Jurnal Teknik Sipil dan Arsitektur

ANALYSIS OF MATERIAL REQUIREMENTS IN COLUMN STRUCTURAL WORK USING CONVENTIONAL METHOD

2026-01-07T16:01:50+07:00

In infrastructure development, it is important to plan material requirements for column structure work. Columns are important elements in bearing the loads they receive, so accurate concrete volume calculations will ensure the columns have the required strength and stability in accordance with SNI 2847:2013 standards [1]. Columns are vertical structural elements in buildings that function to withstand vertical loads and channel them to the foundation [2]. The quality of a building structure depends on the accuracy of material requirement calculations. Errors in calculations can result in significant financial and material losses. Therefore, a study will be conducted related to the analysis of column material requirement calculations for elementary school buildings. The purpose of this study is to analyze the material requirements for floors 1, 2, and 3 and to identify the implementation methods used in column work for the Joglo Elementary School Building Construction. This study applies a quantitative descriptive method. Calculation of column work volume requirements was carried out manually as a learning experience. The results of this study are the total requirement for column reinforcement on the 1st floor; 19,635.9 kg, floor 2; 17,407.6 kg, and floor 3; 17,566.8 kg. Column formwork requirements on the 1st floor; 644 m2, 2nd floor; 546 m2, and 3rd floor; 553 m2. Column casting requirements for 1st floor; 67.30 m3, 2nd floor; 57.06 m3, and 3rd floor; 57.79 m3. The method of implementing column work in this project includes reinforcement work, formwork, casting, dismantling of formwork, and column concrete maintenance.

PRODUKTIVITAS BONGKAR MUAT MODA ANGKUTAN BARANG di PERGUDANGAN KOTA PAREPARE

2026-01-07T16:01:51+07:00

Logistics operations, particularly loading and unloading (L/U) activities within warehouses, constitute critical components of the supply chain. Parepare City, a logistics hub in Indonesia, faces operational challenges including prolonged waiting times and facility constraints, leading to goods congestion and diminished L/U productivity. This study aims to characterize warehouse facilities and freight transport modes while quantitatively measuring cargo handling productivity. Employing a mixed-methods approach, data were collected via field observations (including timed L/U cycles), questionnaires, and documentation across four mechanized warehouses (three commercial, one steel material facility). Multiple linear regression analysis (SPSS v.26) was applied. Field measurements revealed peak productivity at the steel warehouse (51 pieces/minute, negligible waiting time), contrasting with significant variability and extended waiting periods (e.g., 119 minutes) observed in commercial warehouses. Regression analysis identified the quantity of goods (X1), equipment performance (X2), and L/U time (X3) as statistically significant predictors of productivity (Y). The strongest model (RÂ² = 79.5%) was derived for the steel warehouse. The study concludes that strategic investment in mechanical handling equipment and enhanced scheduling protocols are imperative to mitigate waiting times and elevate overall productivity. Its novelty resides in addressing a significant gap in the regional logistics literature through an empirical focus on Parepare's unique warehouse operations.

STUDI KINERJA SIMPANG JALAN PAROS MAMUJU – KALUKKU – JALAN AKSES BANDARA TAMPA PADANG

2026-01-07T16:01:52+07:00

The significant growth in the number of vehicles in Mamuju Regency, West Sulawesi, along with the development of infrastructure such as Tampa Padang Airport and Belang-Belang Port, creates the potential for traffic congestion, especially at the intersection of Jl. Poros Mamuju-Kalukku-Jl. Tampa Padang Airport Access. This study aims to analyze the existing conditions and performance of traffic movements at the unsignalized intersection based on the Indonesian Road Capacity Guidelines (PKJI) 2023. The method used is a quantitative approach through a seven-day traffic survey during peak hours. Data collected included traffic volume, intersection geometry, and environmental conditions around the intersection. Analysis using the Indonesian Road Capacity Guidelines (PKJI) 2023 was conducted on the intersection capacity, and intersection performance. The results showed that the peak hour of vehicles occurred on Monday, May 19, 2025 at 07.00-08.00 a.m. The volume of vehicles was 1111 vehicles / hour or 612.6 smp / hour with a degree of saturation (Dj) 0.20, delay (T) 6.8, queue opportunities (Pa) 2-9%. And on Sunday May 25, 2025 at 10:00-11:00 am, the volume of vehicles was 638 vehicles / hour or 412 smp / hour with a degree of saturation (Dj) 0.14, delay (T) 5.9, queue opportunities (Pa) 1-6%. Performance assessment based on PKJI 2023 parameters provides an overview of the traffic service of the intersection in the level of service (LOS) B category, which means that the traffic flow conditions are good.

PENGARUH PENAMBAHAN SERAT KULIT DURIAN DAN PECAHAN KACA TERHADAP KEKUATAN TEKAN PADA BETON RINGAN

2026-01-07T16:01:53+07:00

Beton ringan banyak digunakan dalam konstruksi karna beratnya yang ringan, namun kelemahan utamanya terletak pada kuat tekan yang rendah. Inovasi diperlukan untuk meningkatkan sifat mekaniknya sekaligus memanfaatkan limbah ramah lingkungan. Penelitian ini bertujuan untuk menganalisis pengaruh penambahan serat kulit durian (sebagai pengganti agregat kasar) dan pecahan kaca (sebagai pengganti agregat halus) terhadap kuat tekan dan workability beton ringan. Metode yang digunakan adalah eksperimental laboratorium dengan membuat benda uji kubus 15x15x15 cm. Variasi campuran terdiri dari beton normal (kontrol), serta dua variasi beton modifikasi: Variasi 1 (substitusi 2% kulit durian dan 4% pecahan kaca) dan Variasi 2 (substitusi 3% kulit durian dan 5% pecahan kaca). Hasil pengujian menunjukkan bahwa nilai slump beton modifikasi turun menjadi 9 cm dari 10 cm pada beton normal, mengindikasikan penurunan workability. Hasil uji kuat tekan pada umur 7 hari membuktikan bahwa beton normal mencapai kuat tekan rata-rata 5,40 MPa. Sementara itu, kuat tekan pada Variasi 1 dan Variasi 2 masing-masing hanya sebesar 3,00 MPa dan 3,20 MPa. Disimpulkan bahwa penambahan serat kulit durian dan pecahan kaca menyebabkan penurunan pada workability dan kuat tekan beton ringan, meskipun Variasi 2 dengan komposisi substitusi lebih tinggi menunjukkan nilai kuat tekan yang sedikit lebih baik.
Kata kunci: Beton ringan, Kulit durian, Pecahan kaca, Kuat tekan, Workability.

ANALISIS RENCANA ANGGARAN BIAYA PADA PROYEK PENINGKATAN SALURAN SEKUNDER IRIGASI ALEBBONG KABUPATEN SIDENRENG RAPPANG

2026-01-07T16:01:54+07:00

This study discusses the importance of managing the cost budget in construction projects that must be planned efficiently and effectively, so that project implementation can meet the main requirements, namely cost, time, and quality. The Alebbong Irrigation Area has an area of 20 Ha, but often experiences damage such as landslides so that channel repair and rehabilitation are required. This research method uses a RAB calculation analysis that refers to the need for secondary channel work and complementary buildings at the project site. The data used includes labor requirements, wages, and material costs calculated based on applicable standards. The results of the study show that the total RAB for the work is Rp 457,757,860.26 consisting of channel work and Tapping I and II work with a total volume of 2,675.503 m^3 which is rehabilitated. From this study, the cost budget plan is quite significant between the results of the RAB calculation analysis of previous studies. Therefore, it is recommended that before conducting the RAB analysis, complete data and more detailed planning drawings are needed so that the cost estimation results are more accurate.

EVALUASI SKENARIO MANAJEMEN LALU LINTAS PADA U-TURN JALAN TEUKU UMAR DENGAN METODE ANALYTIC HIERARCHY PROCESS

2026-01-07T16:01:55+07:00

Jalan Teuku Umar is main road segment in Bandar Lampung city that has a crucial role to support the mobility and economic activity. However, high traffic volume and U-Turn existence can contribute to traffic jam which may decrease the performance of the traffic. This study aims to evaluate the traffic management scenarios, which can be applied on Jalan Teuku Umar, using Analytic Hierarchy Process method. The evaluation can be a consideration for policy making in traffic management. Furthermore, the scenarios that is evaluated in this study are U-Turn closing, U-Turn N-S and S-N relocating to 30 m to north and 40 m to south, respectively, and U-Turn S-N relocating 195 m to north. Those scenarios are compiled from the latest study using microsimulation approach. The study is conducted using 6 (six) criteria, which consist of traffic performance, cost, comfort, saety, environment impact and social impact. The survey involves several experts to respond the questionnaire. The results show that traffic performance is dominant criteria and the third scenario, which relocating U-Turn S-N 195 m to north, is chosen as the most appropriate management scenario for the U-Turn. The study is expected to be a reference for local government to formulate the policy related traffic management, hence the traffic system becomes more effective, efficient and sustainable.

GENDER DISPARITIES IN WORK-RELATED TRAFFIC ACCIDENTS: ADVANCING SAFE SYSTEM STRATEGIES IN BATAM CITY

2026-01-07T16:01:55+07:00

Work-related traffic accidents represent a significant public health and economic issue in rapidly urbanising areas like Batam City, Indonesia. As a major industrial and trade hub, Batam experiences high volumes of commuter traffic, exacerbating road safety challenges. Despite this, a critical gap exists in current research and policy where gender-specific vulnerabilitiesâ€”including differences in risk perception, vehicle choice, and travel patternsâ€”are often overlooked. This study aims to fill this gap by investigating these nuanced gender disparities in work-related traffic accidents in Batam. Furthermore, it seeks to propose actionable strategies for systematically integrating gender considerations into the established Safe System framework, thereby providing evidence-based recommendations for stakeholders. A quantitative research design was employed, utilising a structured questionnaire distributed via Google Forms to a cohort of 498 randomly sampled workers in Batam City. The collected data were analysed using descriptive statistics and simple linear regression in SPSS. The analysis specifically examined the relationship between positive safety perceptions and experiences (BTHD) and workers' perceived vulnerability and wariness (BTHC) during their commute. The results revealed a statistically significant positive relationship (B = 0.626, p < .001). Counter-intuitively, this indicates that as respondents' positive safety perceptions increased, their self-reported level of wariness and alertness also rose. This key finding suggests that a sense of safety among Batam's workforce is not a passive state leading to complacency but is actively constructed upon a state of heightened awareness. The study concludes that achieving the goal of zero fatalities requires the Safe System approach to evolve beyond physical infrastructure to incorporate these complex psychological drivers and gender-specific factors. These findings offer policymakers critical insights for developing more inclusive, equitable, and effective road safety interventions.

IDENTIFIKASI PENYEBAB TIMBULNYA LIMBAH PROYEK KONSTRUKSI DI KOTA AMBON

2026-01-07T16:01:57+07:00

Construction waste is a common issue faced in development projects, primarily due to inefficient material usage, technical errors, and lack of supervision. In Ambon City, the increase in construction activities has not always been accompanied by proper waste management. This study aims to identify the most dominant types of construction waste and analyze the main factors causing the generation of such waste from the perspective of stakeholders, namely contractors, consultants, and government agencies. The method used is a descriptive quantitative approach through a two-stage questionnaire distribution. The first stage was conducted to determine the most dominant type of waste, while the second stage measured the intensity of the factors causing waste generation based on project phases: planning, procurement, and implementation. A total of 77 respondents were involved in this study. Data analysis techniques included validity tests, reliability tests, as well as mean analysis and ranking using the SPSS program. The results show that ceramic tiles are the most dominant type of waste. The main contributing factor is the large number of unusable ceramic tile cuts due to mismatched room dimensions, followed by incomplete working drawings and careless material handling. Waste management strategies derived from respondent feedback have been validated by experts and deemed feasible for on-site implementation.

EVALUASI PENERAPAN SISTEM MANAJEMEN KESELAMATAN DAN KESEHATAN KERJA (SMK3) (Studi Kasus : Pembangunan Gedung Workshop Cikarang)

2026-01-07T16:01:57+07:00

Occupational safety and health are crucial aspects in the implementation of construction projects, especially large-scale projects such as the construction of the Workshop Building in Cikarang. Workplace accidents that still frequently occur on-site highlight the importance of evaluating the implementation of the Occupational Safety and Health Management System (OSHMS). This study aims to measure the level of OSHMS implementation, identify the barriers to its implementation, and evaluate the strategies used to overcome these barriers. The method used in this study is descriptive evaluative with a quantitative approach, where data was collected through the distribution of questionnaires to 80 respondents consisting of workers and project management teams. The research instruments were tested using validity and reliability tests, and the results were analyzed using mean calculations and the Relative Importance Index (RII). Data was processed using SPSS software. The research results indicate that the level of SMK3 implementation is in the â€œVery Goodâ€ category, with the highest average score of 4.7 and an RSI of 0.94 on the indicator of understanding and implementation of safety procedures. The obstacles faced were categorized as â€œLess Hindering,â€ with the lowest average score of 1.89 and an RSI of 0.38 related to management commitment to SMK3. Meanwhile, strengthening strategies such as safety briefings and SOP evaluations were categorized as â€œVery Effective,â€ with the highest average score of 4.63 and an IKR of 0.925. The conclusion of this study is that the implementation of SMK3 in this project has been optimal, with minimal obstacles and effective control strategies

PERBANDINGAN UJI CBR LAPANGAN MENGGUNAKAN DCP DAN CBR LABORATORIUM PADA RUAS JALAN DALAM NEGERI HUTUMURI

2026-01-07T16:01:58+07:00

The strength of the subsoil plays a very important role in the planning of road pavement structures. If the soil strength is insufficient, the road pavement may experience damage. Therefore, a soil investigation is necessary to identify the characteristics and bearing capacity of the soil. One method for measuring the soil's bearing capacity is through the calculation of the CBR (California Bearing Ratio) value. This study aims to examine the soil characteristics and compare the CBR values obtained from field measurements using a DCP (Dynamic Cone Penetrometer) with those obtained from laboratory testing. Based on the AASHTO classification, the soil in the road section in Hutumuri is classified as A-2-4, A-2-5, and A-2-7. The results of this study show that the lowest ratio between laboratory CBR and field CBR is 1:1.13 at point 3, while the highest ratio is 1:1.19 at point 1. Based on the obtained ratio, it appears that to determine the CBR value without conducting laboratory CBR testing, one can use a multiplier of 1.13 to 1.19 times the field CBR value obtained from the DCP test.

ANALISIS POLA RUANG DAN TIPOLOGI ARSITEKTUR MARITIM DI PESISIR PANTAI LEATO SELATAN KOTA GORONTALO

2026-01-07T16:01:59+07:00

Coastal areas are strategic regions that reflect the interaction between humans and the maritime environment. In Leato Selatan Village, Gorontalo City, there is a coastal community settlement with distinctive spatial characteristics and architectural forms as a result of adaptation to local geographical and cultural conditions. This study aims to analyze the spatial patterns of the settlement and the maritime architectural typology in the area. The method used in this study is a descriptive qualitative approach with data collection techniques through field observations, in-depth interviews, visual documentation, and literature studies. The analysis was conducted on the spatial arrangement, building orientation, and architectural elements that reflect adaptation to the coastal environment. The results of this study identified the spatial patterns in South Leato Village as coastal fishing settlements and classified the maritime architectural typology that reflects local wisdom and socio-ecological factors in South Leato Village.

ANALISIS PENGARUH PEMASANGAN CONTROLLED MODULUS COLUMN (CMC) PADA DAYA DUKUNG DAN PENURUNAN TANAH LUNAK

2026-01-07T16:02:00+07:00

The construction of a structure on soft soil has the potential for structural failure. This phenomenon occurs because the low bearing capacity of soft soil is accompanied by high compressibility, resulting in large settlements and low stability. This problem needs to be solved by soil improvement. In the Indrapuraâ€“Kisaran STA 112 + 500 Toll Road Construction Project, soil will be filled more than the ground's bearing capacity. Therefore, a soil improvement method using a Controlled Modulus Column (CMC) is necessary. The analysis method used in this study uses analytical methods and the finite element method (FEM). The analysis was performed by comparing the bearing capacity and settlement in conditions without improvement (preloading) and with improvement using CMC. The installation of CMC with a spacing of 1 meter, a diameter of 0.42 meters, an LTP thickness of 1 meter, and a concrete quality of 16.41 MPa showed an increase in soil bearing capacity of 30%. The rise in ground bearing capacity also affected soil compressibility, resulting in a reduction of up to 68% in soil settlement. Therefore, installing CMC on soft soil effectively increases bearing capacity and reduces settlement. Ground stability is improved, with the safety factor rising to 2.11.

Keyword: bearing capacity, Controlled Modulus Column (CMC), settlement, soft soil, soil improvement

ANALYSIS OF FACTORS INFLUENCING THE MODE CHOICE PREFERENCE OF INTERNATIONAL TOURISTS IN THE KUTA RAYA AREA

2026-01-07T16:02:00+07:00

Kuta Raya is one of Baliâ€™s main tourist destinations, characterized by high mobility among international tourists and various transportation mode options. This study aims to analyze the factors related to international touristsâ€™ preferences in choosing transportation modes in the Kuta Raya area. Data were collected through questionnaires distributed to 134 international tourists visiting Kuta, Seminyak, and Legian. The analysis employed the Crosstab method with the Chi-Square (?Â²) test to identify statistical relationships between tourist characteristics, travel factors, and mode choice. The results indicate that driving license ownership (SIM A), frequency of visit, transportation cost, and parking cost have a significant relationship (p < 0.05) with touristsâ€™ mode choice. Meanwhile, variables such as gender, age, income, and comfort show no significant relationship. These findings suggest that cost-related aspects and travel experience are the main considerations influencing international touristsâ€™ transportation mode preferences in the Kuta Raya area.

PREFERENCES AND PRIORITIES IN SPATIAL EXPANSION OF TYPE-21 HOUSES

2026-01-07T16:02:01+07:00

Type-21 houses are among the most popular forms of housing for low-income communities due to their affordability and the support of government subsidy programs. However, the limited building area encourages occupants to undertake spatial transformations to meet functional needs and accommodate the dynamics of domestic activities. This study aims to identify the preferences and priorities of spatial development in Type-21 housing as a basis for understanding residentsâ€™ adaptive spatial patterns. Data were collected through questionnaires, interviews, and field observations involving 24 Type-21 houses located in four residential areas in Magelang. Samples were selected purposively, focusing on privately owned houses that had undergone renovation. The analysis was conducted by assigning scores to the sequence of space priorities based on interview results and observations of layout changes at each renovation stage. The findings reveal that the top three space priorities are the living room, master bedroom, and main bathroom/WC, which represent the basic functions originally provided by developers. However, the kitchen emerged as an additional primary need, considered essential by all respondents. Subsequent priorities include the terrace, additional bedrooms, and laundry areas, which develop according to the economic capacity and family size of each household. These results indicate that spatial development in small-scale housing occurs progressively and adaptively,

THE COMPOSITION OF THE WISMA KILANG FACADE AS A BASIS FOR THE RECONSTRUCTION OF JENGKI ARCHITECTURE IN BALIKPAPAN

2026-01-07T16:02:02+07:00

Jengki architecture represents a modern architectural style that flourished in Indonesia during the 1950s and 1960s. One of its remaining examples is Wisma Kilang, located at Pantai Kilang Mandiri, Balikpapan. This building serves as a silent witness to the cityâ€™s visual transformation over time and once stood out for its distinctive form that shaped the architectural trends of its era. However, modernization has brought significant alterations to the building, primarily driven by contemporary functional demands and owner preferences. The faÃ§ade, in particular, has undergone substantial changes in its components, materials, and overall composition, posing a potential threat to the continuity of Jengki architectural identity. This study aims to identify faÃ§ade components and analyze their compositional characteristics to understand the phenomena of consistency and transformation. A qualitative-descriptive method with a rationalistic paradigm was applied in field data collection. Data were analyzed through morphological visual analysis and triangulation. The research examined six Wisma Kilang buildings, focusing on roof structures, fences, columns, and openings. Findings indicate several faÃ§ades have changed, especially in doors, windows, and canopy roofs, due to renovation and functional adaptation. Nevertheless, two buildings maintain a consistent faÃ§ade composition, which may serve as a preliminary reference for reconstructive and preservation efforts of historical buildings within the faÃ§ade context in the future

PRELIMINARY STUDY ON THE PERMEABILITY AND COMPRESSIVE STRENGTH OF ECO FRIENDLY POROUS CONCRETE UTILIZING INDUSTRIAL WASTE

2026-01-07T16:02:03+07:00

The increasing generation of industrial waste and the growing demand for sustainable construction materials have driven the development of pervious concrete as an environmentally friendly pavement material. Pervious concrete possesses high drainage capability, effectively reducing surface runoff and enhancing groundwater infiltration. This study evaluates the effect of High-Density Polyethylene (HDPE) waste as a partial replacement for coarse aggregate on the compressive strength, density, porosity, and permeability of pervious concrete using split and gravel aggregates at a waterâ€“cement ratio (w/c) of 0.40. HDPE was incorporated at 0%, 5%, 10%, and 15% by weight of coarse aggregate, and testing was conducted at 28 days. The results show that compressive strength decreased from 16.75 MPa to 10.32 MPa for gravel and from 18.92 MPa to 15.41 MPa for split aggregate. Density declined from approximately 2100 kg/mÂ³ to about 1850 kg/mÂ³ with increasing HDPE content. Conversely, porosity increased from 30â€“32% to 37â€“38%, while permeability rose from approximately 29â€“35 mm/s to 44â€“46 mm/s. A strong correlation (RÂ² > 0.80) was found between porosity and permeability, indicating that hydraulic performance is predominantly governed by the interconnected pore structure induced by HDPE modification. Overall, a 5% HDPE substitution achieved the best balance between structural strength and drainage performance without significant strength loss, supporting the implementation of green infrastructure principles in sustainable pavement systems, whereas HDPE contents above 10% were mechanically inefficient.

ANALISIS DAYA DUKUNG DAN PENURUNAN TIANG PANCANG TERHADAP HASIL PDA PADA PROYEK SPAM PEKANBARU-BANGKINANG

2026-01-07T16:02:04+07:00

The drinking water supply system (SPAM) is an infrastructure facility specifically designed to provide clean and safe drinking water that meets established health standards. In this project, the construction buildings utilize foundations in the form of piles and bored piles, which serve as essential structural elements to support and distribute loads from the columns to the underlying hard soil layer. A properly designed foundation ensures the stability and durability of the overall structure. This study aims to analyze and determine the bearing capacity of the foundation using several analytical approaches, namely the Meyerhoff, Reese & Wright, and Luciano Decourt methods, while the settlement analysis is carried out using the Fellenius and Vesic methods. The research was conducted in Kampar Regency, Riau Province, Indonesia. The data used in this analysis include Standard Penetration Test (SPT) data and Pile Driving Analyzer (PDA) test results obtained from field observations. The calculation results indicate that the bearing capacity obtained from the Meyerhoff method is 103 tons, Reese & Wright 176 tons, Luciano Decourt 353 tons, and PDA 204 tons. Meanwhile, the settlement results show values of 10.7 mm for the Fellenius method, 16.05 mm for the Vesic method, and 14.5 mm for PDA measurements.

KARAKTERISTIK MARSHALL CAMPURAN ASPAL PORUS DENGAN PEMANFAATAN LIMBAH BONGGOL JAGUNG SEBAGAI FILLER

2026-01-07T16:02:05+07:00

Porous asphalt is a mixture of hot asphalt with an open gradation, characterized by a high proportion of coarse aggregates and a low proportion of fine aggregates, creating large air voids of around 18% - 25% in the mixture structure. These air voids are designed to allow water flow during rain, thus reducing the occurrence of surface water pooling on roads. Currently, porous asphalt is being developed as an alternative material for the construction of wearing courses. This study aims to analyze the use of corn cob waste as a filler in porous asphalt mixtures. The study tests the optimum asphalt content (OAC) in mixtures using corn cob ash filler that passes through a No. 200 sieve (0.075 mm) by 1%, with variations of asphalt content at 4%, 4.5%, 5%, 5.5%, and 6%. The determination of optimum asphalt content follows the guidelines set by the Bina Marga Specifications (Revision 2, 2018) and the Australian Asphalt Pavement Association (AAPA 2004), using three main parameters: Marshall, Cantabro Loss (CL), and Asphalt Flow Down (AFD). The results showed that the values of the three main parameters, namely Void in Mixture (VIM) at asphalt contents of 4% - 4.5% (20.81% and 18.25%), met the required range of 18% - 25%, Cantabro Loss (CL) at asphalt contents of 4.5% - 6% (29.10%, 23.61%, 18.69%, 14.29%) met the requirement of ? 35%, and Asphalt Flow Down (AFD) at 4% - 4.5% (0.15% and 0.25%) met the requirement of ? 0.3. The optimum asphalt content (OAC) in this study was found to be 4%.

ANALISIS STABILITAS LERENG DINDING PENAHAN TANAH MENGGUNAKAN SOFTWARE GEO5 PADA AKSES JALAN PLTMH LAMPUNG

2026-01-07T16:02:05+07:00

Micro Hydro Power Plant (PLTMH) is one of the solutions in meeting the needs of renewable energy, especially in remote areas that have abundant water resource potential. This study aims to analyze slope stability and analyze the budget plan for building a retaining wall with a cantilever wall or gravity wall type. The method used in this study is using GEO5 software and calculating the budget plan (RAB). The results of this study using retaining wall analysis using GEO5 Software with the Cantilever Wall type get the Safety Factor results: 1.87> 1.10, the results of retaining wall analysis using GEO5 Software with the Gravity Wall type get the Safety Factor results: 2.03> 1.10. And the results of the RAB recapitulation using the Cantilever Wall type compact the results: Rp 6,469,724,186, and the results of the RAB recapitulation using the Gravity Wall type compact the results: Rp 2,445,607,393. So the most efficient RAB result is using the Gravity Wall type.

PENGARUH PEMANFAATAN LIMBAH SANDAL JEPIT TERHADAP PARAMETER MARSHALL PADA CAMPURAN ASPAL PORUS

2026-01-07T16:02:06+07:00

The rapidly growing industrial sector in Indonesia, ranging from home-based industries to large-scale enterprises, has the potential to generate inorganic waste containing hazardous chemicals that are difficult to decompose and may have adverse impacts on the environment. This study specifically examines waste produced from the slipper manufacturing process by a home-based industry located at Jl. Wadungasri No. 43, Waru, Sidoarjo, as an additive material in porous asphalt mixtures. Porous asphalt is a modern technology within the category of flexible pavement designed to address water puddling issues on road surfaces, owing to its physical structure that contains voids allowing water to pass through. The research methodology employed in this study follows the approach proposed by the Australian Asphalt Pavement Association (AAPA, 2004), in which the Optimum Asphalt Content (OAC) obtained was 4.72%. The testing conducted using an OAC of 4.72% involved substituting waste material into the total mixture with variations of slipper waste content at 0%, 1.5%, 3%, and 4.5%. In accordance with the porous asphalt parameters specified by the Australian Asphalt Pavement Association (2004), at an Optimum Asphalt Content (OAC) of 4.72% and with a recycled flip-flop waste variation of 1.5%, the average Cantabro Loss (CL) obtained was 28.34%, the average Air Flow Density (AFD) was 0.19%, the average Marshall Stiffness (MQ) was 614.1 kg/mm, the average stability was 1217.7 kg, and the average Voids in Mix (VIM) was 20.5%. At an OAC of 4.72% and a waste variation of 3%, the average CL obtained was 33.44%, the average AFD was 0.13%, the average MQ was 621.3 kg/mm, the average stability was 896.2 kg, and the average VIM was 21.5%. At an OAC of 4.72% and a waste variation of 4.5%, the average CL obtained was 36.76%, the average AFD was 0.07%, the average MQ was 529.4 kg/mm, the average stability was 554.6 kg, and the average VIM was 24.9%.

Keyword: AAPA 2004, Open Graded, Flip Flops Waste, Marshall Test.

PENGARUH SUBSTITUSI ABU SEKAM PADI PADA SEMEN DAN ABU BONGGOL JAGUNG PADA AGREGAT HALUS TERHADAP KUAT TEKAN DAN KUAT LENTUR BETON

2026-01-07T16:02:07+07:00

This study aims to investigate the effect of rice husk ash (RHA) as a partial replacement of cement and corn cob ash (CCA) as a partial replacement of fine aggregate on the compressive and flexural strength of concrete at 28 days. The concrete was designed with a target strength of 20 MPa. RHA was used at 6% by weight of cement, while CCA was varied at 4%, 5%, 6%, and 7% by weight of fine aggregate. Testing was performed using cylindrical specimens for compressive strength and beam specimens for flexural strength at 28 days. The control concrete (without additives) had a compressive strength of 10.191 MPa. The addition of 6% RHA and 4% CCA increased compressive strength to 13.135 MPa, rising to 13.531 MPa at 5% CCA, and reaching a peak of 13.701 MPa at 6% CCA, an increase of 34.4% compared to the control. However, at 7% CCA, compressive strength decreased to 12.059 MPa. For flexural strength, the control concrete reached 3.081 MPa, while the highest value of 3.595 MPa was obtained at 7% CCA, an increase of 16.7%. The results indicate that RHA and CCA can improve the mechanical properties of concrete, with different optimum percentages for compressive and flexural strength

Keyword: Concrete, Rice husk ash, Corn cob ash, Compressive strength, Flexural strength

TINGKAT KEPATUHAN TENAGA KERJA KONSTRUKSI DALAM IMPLEMENTASI PELAKSANAAN K3 PADA PROYEK KONSTRUKSI DI KOTA SURAKARTA

2026-01-07T16:02:08+07:00

Surakarta (Solo), as one of the major cities in Central Java, is experiencing rapid development in the construction sector, both for commercial, residential, and infrastructure projects. The implementation of SMKK (Vocational Occupational Safety and Health) in construction projects in Surakarta is certainly a very important aspect to create a safe, healthy work environment, and avoid potential work accidents. Occupational Safety and Health (K3) is an important aspect in construction projects to prevent work accidents and increase worker productivity. However, the level of compliance with K3 in the field remains a significant challenge. This study aims to analyze the level of worker compliance with K3 in construction projects and the factors that influence it. The research method uses a quantitative approach by distributing questionnaires to construction workers and field observations. Testing in this study uses descriptive statistical methods. This study shows that worker compliance with K3 in Surakarta City is in the good category with an average of 3.078. The Top Management Commitment to K3 variable has the highest compliance level (3.13), while the K3 Regulations and Procedures variable has the lowest compliance value (3.01). For other variables are the Use of PPE (3.113), Worker Communication (3.093), Work Environment (3.09), Worker Competence (3.027). From these results, to increase the level of compliance of construction workers in implementing K3, further efforts are needed in the form of increased education and stricter supervision.

KAJIAN PENILAIAN KONDISI JEMBATAN MENGGUNAKAN PEDOMAN PEMERIKSAAN JEMBATAN 2022 DAN BRIDGE HEALTH INDEX (BHI)

2026-01-07T16:02:09+07:00

Indonesia remains committed to prioritizing national infrastructure development in an effort to boost regional economic growth. Proper optimization of funds is necessary, given the high maintenance costs. Thus, proper procedures and systematic implementation are essential. To achieve the best results, a bridge management system is needed. However, in its application, the bridge management system in Indonesia still faces assessment challenges (bias) that can affect the results. Therefore, several approaches are needed to complement development and provide input. To evaluate the assessment system in the 2022 Bridge Inspection Guidelines, this study aims to adopt the Bridge Health Index (BHI) method. This study attempts to identify the advantages and disadvantages of both approaches, which are expected to contribute significantly to the development of bridge management systems in Indonesia. Based on the results of the analysis, the BHI method provides a priority order for handling based on bridge condition values, while for the 2022 Guidelines, the priority order cannot yet be determined because there is still a bias between the condition values of one bridge and another, so further analysis is needed. Based on the comparison results, damage to the core elements of the bridge will be prioritized when these elements are weighted. The ranking results can be made clearer by using a numerical assessment range and a weighting scheme, which reduces bias. This perspective is important to provide input for developers and contribute to the growth of Indonesia's bridge management system in the future.

PERKUATAN GESER BALOK BETON BERTULANG MENGGUNAKAN GFRP (STUDI KASUS: GOR BAROMBONG MAKASSAR)

2026-01-07T16:02:10+07:00

Shear failure is recognized as a brittle and sudden collapse mode, making it a critical issue that necessitates effective strengthening solutions for reinforced concrete beam structures. The main objective of this study is to evaluate the effectiveness and feasibility of Glass Fiber Reinforced Polymer (GFRP) composite as external reinforcement to address the shear strength deficit in reinforced concrete beams. The case study focuses on the West Tribune beams of GOR Barombong Makassar, which experienced shear failure due to a combination of low material quality, exposure to an aggressive marine environment, and increased capacity demands resulting from the seismic standard update from SRPMM to SRPMK. The research methodology utilized analytical calculations based on the ACI 440.2R-08 guidelines. Analysis results indicate that the existing shear strength of the beams is 424.23 kN, while the required additional strength varies from 21.57 kN to 53.93 kN to meet the design shear strength. Six GFRP U-Wrap strengthening configurations were analyzed, demonstrating the capability to provide additional shear strength ranging from 26.68 kN to 55.31 kN. The application of a specific GFRP configuration at the beam supports successfully increased the total shear capacity by 6.3% to 13.0%, proving that GFRP is an effective and efficient shear strengthening solution, and is superior due to its non-corrosive properties, making it suitable for aggressive environments.

INTEGRATION OF AERIAL IMAGERY AND BATHYMETRY FOR DIGITAL ELEVATION MODELING OF THE WONOKROMO RIVER BEND

2026-01-07T16:02:11+07:00

Penelitian ini bertujuan untuk menghasilkan model elevasi yang akurat pada segmen belokan Sungai Wonokromo melalui integrasi fotogrametri udara berbasis Unmanned Aerial Vehicle (UAV) dan pengukuran batimetri. Banjir di wilayah Surabaya Selatan dipengaruhi oleh kombinasi pasang surut, penyempitan geometri sungai, serta sedimentasi pada tikungan yang menurunkan kapasitas aliran, sehingga diperlukan informasi topografi dan batimetri yang lebih detail. Akuisisi data dilakukan menggunakan Unmanned Aerial Vehicle (UAV) yang menghasilkan 653 citra dengan 20 GCP dan 8 ICP, serta survei kedalaman sungai menggunakan echosounder frekuensi 200 kHz. Alur pemrosesan meliputi penyelarasan citra, pembuatan dense cloud, konstruksi DSM/DTM, pembuatan ortofoto, dan integrasi data batimetri yang telah dikoreksi ke tinggi ortometrik menggunakan model geoid SRGI. Evaluasi ketelitian menunjukkan nilai CE90 sebesar 0,064 m dan LE90 sebesar 0,073 m, memenuhi standar ketelitian Kelas 1 untuk pemetaan skala 1:1.000. Ortofoto yang dihasilkan memiliki GSD 2 cm dan mampu merepresentasikan detail morfologi tikungan sungai dengan sangat baik. DEM topobatimetri yang terintegrasi menghasilkan model elevasi menyeluruh dari darat hingga dasar sungai, yang dapat dimanfaatkan untuk analisis pola aliran, identifikasi area erosi–deposisi, serta evaluasi perubahan bentuk meander Sungai Wonokromo. Hasil ini menunjukkan bahwa dataset yang dihasilkan sangat layak digunakan untuk analisis hidromorfologi dan perencanaan mitigasi banjir di kawasan tersebut.

ROLES OF ENVIRONMENTAL CONDITIONS AND ULTRASONICATION IN RELEASING ORGANIC MATTER FROM BIOLOGICAL ACTIVATED CARBON

2026-01-07T16:02:12+07:00

Biological activated carbon (BAC) is widely used in drinking water treatment because it combines adsorption on activated carbon with biodegradation carried out by the attached microbial community. However, environmental shifts such as changes in pH, temperature, or physical disturbances may cause previously adsorbed organic matter (OM) to detach from the activated carbon. This phenomenon can increase dissolved organic carbon in treated water and potentially affect downstream processes. This study examined how pH, temperature, and ultrasonication influence the release of OM from BAC. The BAC was extracted using DOC-free tap water under different pH conditions (5.8, 7.0, and 8.6) and temperatures (5°C, 20°C, and 30°C), with and without the application of ultrasonication. After treatment, dissolved organic carbon (DOC) and UV absorbance at 260 nm (UV260) were measured to characterize the released OM. The results show that higher pH promotes OM detachment, with both DOC and UV??? values increasing markedly under alkaline conditions. Temperature also played a strong role; warmer conditions enhanced OM release, indicating that higher kinetic energy and increased molecular mobility facilitate detachment. Ultrasonication consistently intensified the release across all conditions, suggesting that the disruption of biofilms and the reopening of blocked pores contribute to this effect. The findings highlight the sensitivity of BAC to operational changes and underscore the importance of monitoring OM release to maintain the reliability of drinking water treatment systems.

PENGARUH BEBAN GEMPA TERHADAP RESPON STRUKTUR GEDUNG TUA TERBENGKALAI (STUDI KASUS: GEDUNG KLABAT PLAZA MANADO)

2026-01-07T16:02:12+07:00

Penelitian ini bertujuan untuk mengevaluasi pengaruh beban gempa berdasarkan zonasi terbaru terhadap respons struktur Gedung Klabat Plaza Manado, yaitu sebuah bangunan tua yang telah lama terbengkalai dan berada pada wilayah dengan tingkat aktivitas seismik tinggi. Kajian dilakukan melalui investigasi lapangan meliputi pengumpulan data kondisi fisik bangunan, pengujian mutu beton menggunakan rebound hammer, pengujian kuat leleh tulangan baja melalui metode Leeb Hardness Test, serta pemindaian tulangan untuk mengidentifikasi konfigurasi aktual elemen struktural. Selanjutnya, pemodelan struktur dilakukan menggunakan SAP2000 v.26 dengan mengadopsi parameter beban gempa sesuai SNI 1726:2019 melalui analisis respons spektrum dan analisis nonlinier pushover. Hasil analisis respons spektrum menunjukkan bahwa simpangan maksimum pada kedua arah masih memenuhi batas interstorey drift yang disyaratkan standar, sehingga secara elastis struktur masih memiliki kekakuan lateral yang cukup. Namun, hasil analisis pushover mengungkap bahwa struktur berada pada level kinerja Damage Control, dengan beberapa kolom lantai dasar melampaui batas Collapse Prevention (CP). Kondisi ini menunjukkan bahwa struktur rentan mengalami mekanisme strong beam–weak column yang berbahaya pada saat terjadi gempa besar. Elemen kritis terutama ditemukan pada kolom dasar, balok kantilever, dan balok nonprismatis yang mengalami konsentrasi gaya dalam signifikan. Secara keseluruhan, gedung masih dapat dipertahankan apabila dilakukan perkuatan yang tepat, khususnya pada elemen kolom dasar dan sistem penahan gaya lateral. Penelitian ini memberikan dasar teknis penting bagi upaya rehabilitasi bangunan tua serta pengambilan keputusan pengelolaan aset bangunan di kawasan rawan gempa.

ASSESSMENT OF FLASH FLOOD POTENTIAL USING THE FLASH FLOOD POTENTIAL INDEX (FFPI) KRUZDLO MODEL (CASE STUDY: WAY ILAHAN SUB-WATERSHED, LAMPUNG)

2026-01-07T16:02:13+07:00

A flash flood is a rapidly occurring flood with a high discharge rate and significant destructive power. Flash floods result from a combination of natural factors and human activities and have serious consequences for society, such as loss of life, infrastructure damage, and environmental impact. This study aims to map the potential hazard areas of flash floods in the catchment area of Way Ilahan, Tanggamus Regency, Lampung Province using the Flash Flood Potential Index (FFPI) method based on GIS with the Kruzdlo model (2010). This method processes spatial data such as slope maps, vegetation density, land use, and soil texture. Through this approach, flash flood hazard classes can be identified based on regional characteristics analyzed within a GIS system using raster processing techniques. The study results indicate that 363.63 hectares of the Way Ilahan catchment area fall into the high-category flash flood hazard class, while 19,089.18 hectares are categorized under the medium-level hazard class. Through this mapping, relevant stakeholders such as local governments and communities can take more effective preventive measures to reduce the impact of flash flood disasters.

ALOKASI AIR BAKU DAS PAKIJANGAN DI KABUPATEN BREBES

2026-01-07T16:02:14+07:00

The Pakijangan River Basin in Brebes Regency plays a critical role in supplying raw water for domestic, agricultural, and environmental needs. However, the absence of continuous streamflow records and increasing pressure on water resources pose significant challenges to effective management. This study aims to quantitatively estimate water allocation within the basin through a water balance approach. The methodology includes field surveys of existing conditions, analysis of water demand and availability, and water balance simulation using the RIBASIM (River Basin Simulation) model integrated with the Sacramento rainfall-runoff method. Rainfall data were obtained from two representative manual stations: Klampok and Slatri. Simulation results indicate that the Pakijangan Basin remains in surplus throughout the year, with dependable flow sufficient to meet all domestic and non-domestic water demands. With a distribution efficiency indicator (K factor) of 1, the basin even has the capacity to supply neighboring basins (Pemali River Basin) at a rate of 0.1 mÂ³/s. These findings serve as a valuable foundation for sustainable, equitable, and efficient water resource planning and management in the region

ANALISIS REKAYASA LALU LINTAS SIMPANG EMPAT MANNA KAMPUS GODEAN, JALAN YOGYAKARTA - DEMAKIJO, NGESTIHARJO, KASIHAN, BANTUL

2026-01-07T16:02:14+07:00

Yogyakarta – Demakijo Road, better known as Godean Road, is a primary collector road in the Special Region of Yogyakarta that connects the city of Yogyakarta, Bantul Regency, and Sleman Regency. Along Yogyakarta – Demakijo, there are several 3-arm and 4-arm road intersections that connect to the surrounding areas. This study analyzes the traffic performance and provides engineering recommendations for the Manna Kampus Godean Four-Arm Intersection on Yogyakarta-Demakijo Road, Ngestiharjo, Kasihan, Bantul. The research was prompted by the policy of closing right-turn access via water barriers, forcing vehicles to make U-turns and creating weaving movements. The analysis method employed the 2023 Indonesian Road Capacity Manual (PKJI) to evaluate the performance of the four existing weaving sections. The results indicate that all sections suffer from a very high degree of saturation (DS), exceeding 1.5, signifying overcapacity conditions. Traffic delays were also recorded, ranging from 2.01 to 2.95 seconds/pcu. To achieve the ideal DS of ? 0.85, simulations recommend widening the weaving sections to 11-16 meters. However, a cost analysis reveals that land acquisition alone would require a minimum budget of IDR 70 billion, coupled with potential social conflicts. As an alternative, reactivating the traffic signals (APILL) could be considered but necessitates further in-depth study on vehicle movement characteristics.