Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil is a journal that publishes research results, scientific reviews, theory and applications as well as other information in the fields of science, technology and applied science; especially civil engineering, environmental engineering, and urban management. Jurnal komposit: Jurnal Ilmu-ilmu Teknik Sipil issued biannually, on February and August each year. Articles are written in English or Bahasa Indonesia. Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil has been accredited by SINTA 3 according to the Decree of the Directorate General of Research and Development, Ministry of Higher Education, Research and Technology of the Republic of Indonesia, Nomor : 0110/C3/DT.05.00/2026, dated 03 Februari 2026, about Scientific Journal Accreditation Rankings for 2nd Period of 2025. --- --- --- Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil adalah jurnal yang mempublikasikan hasil-hasil penelitian, ulasan ilmiah, teori dan aplikasi serta informasi lain di bidang ilmu pengetahuan, teknologi, dan sains (IPTekS), terutama teknik sipil, lingkungan, dan pengelolaan wilayah-kota. Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil terbit dua kali dalam setahun, pada bulan Februari dan Agustus setiap tahunnya. Artikel yang diterbitkan di dalam Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil dapat dituliskan dalam Bahasa Inggris atau Bahasa Indonesia. Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil telah terakreditasi dengan peringkat SINTA 3, sesuai SK Direktur Jenderal Riset dan Pengembangan Nomor 295/C/C3/KPT/2026 tanggal 2 Januari 2026 tentang Peringkat Akreditasi Jurnal Ilmiah Periode 2 Tahun 2025. --- --- --- ISSN : 26153513 E-ISSN : 2655934X Garuda : https://garuda.kemdiktisaintek.go.id/journal/view/19739 Profil Sinta: https://sinta.kemdiktisaintek.go.id/journals/profile/9515 DOI Current Issue (Vol. 10 (1) 2026): http://dx.doi.org/10.32832/komposit.v10i1 Dikelola oleh (managed by): Program Studi Teknik Sipil Fakultas Teknik dan Sains - Universitas Ibn Khaldun Bogor Jl. KH. Sholeh Iskandar KM. 2 Kd. Badak, Kec. Tanah Sareal - Kota Bogor
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Analisis Time Cost Trade Off sebagai Strategi Percepatan Proyek untuk Efisiensi Pembangunan Gedung Laboratorium Teknik 4 Institut Teknologi Sumatera
Project delays in construction are complex issues that have a significant impact on increasing costs and completion time. This study aims to analyze the optimal project acceleration strategy for the construction of the Engineering Laboratory Building (GLT) 4 at ITERA, which is experiencing delays, by applying the Time Cost Trade Off (TCTO) method. This quantitative research compares three alternative acceleration strategies: adding working hours (overtime), adding work shifts, and adding labor and heavy equipment. Primary data was obtained through interviews with the contractor, while secondary data included the time schedule, the Budget Plan (RAB), and other project documents. The analysis was conducted by compiling a critical work network, calculating normal duration and costs, and analyzing the crash duration and crash cost for each alternative. The results show that the project's normal condition has a duration of 224 days with a total cost of Rp 16,927,594,301. All three acceleration strategies proved effective in reducing both duration and cost. The strategy of adding labor and heavy equipment proved to be the most optimal, resulting in a duration of 163 days (time efficiency of 27.23%) with the highest cost efficiency of 5.75%. The alternative of adding work shifts resulted in the fastest duration of 161 days (time efficiency of 28.13%), but with lower cost efficiency (4.92%). Meanwhile, adding overtime hours was the weakest alternative with a duration of 178 days (time efficiency of 20.54%) and a cost efficiency of 3.51%. The research confirms that adding resources (labor and equipment) provides the most beneficial time-cost trade-off for this project, where the indirect cost savings from shortening the heavy equipment rental period are greater than the additional direct costs.
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Optimalisasi Daya Dukung Tanah Lempung dengan Campuran Spent Bleaching Earth (SBE) dan Kapur Tohor
Clay soil has high water content, high plasticity, and low bearing capacity, which often causes structural problems in construction projects, as observed at the research location on Jl. Siak II, Masjid Raya Province of Riau area, where structural settlement occurred due to insufficient soil bearing capacity. This study aims to improve the physical properties and bearing capacity of clay soil through stabilization using a mixture of Spent Bleaching Earth (SBE) and quicklime. Laboratory tests were performed using a mixture variation of 22.5% SBE and 25% quicklime with curing durations of 0, 4, and 7 days and a soaking period of 4 days. The laboratory program included water content, specific gravity, sieve analysis, Standard Proctor compaction, and California Bearing Ratio (CBR) tests. The untreated soil exhibited a water content of 29.45%, a specific gravity of 2.43 g/cm³, 40.44% retained on sieve No.200, and a maximum dry density of 1.57 kN/m³ at an optimum moisture content of 20.8%. The CBR value of the untreated soil increased with curing time, reaching 13.99% on the 7th day. For the stabilized soil, the highest CBR improvement was achieved by the mixture of soil + SBE + quicklime with 7 days of curing, reaching 29.36%, while the best CBR under 4-day soaking occurred in the mixture of soil + quicklime with a CBR value of 20.75%. These findings indicate that the combined use of SBE and quicklime is effective in enhancing the bearing capacity of clay soil, with optimal performance observed after 7 days of curing.
Faktor Dominan Penghambat Pelaksanaan Proyek pada Industri Konstruksi
The construction sector in Indonesia has experienced significant growth in recent years, marked by frequent project delays across various construction projects. Project delays are a pressing issue in the Indonesian construction industry. Investors are increasingly concerned about this issue, necessitating a comprehensive study to uncover potential solutions. Therefore, a comprehensive study of construction project delays in Indonesia is needed. This study examines in-depth the parties involved in construction project implementation, namely project owners, consultants, and contractors. This study examines twenty (20) main factors causing project delays summarized from several leading journals in previous research from 2024-2016. These inhibiting factors are grouped into three main groups: Owners, Contractors, and Consultants. Literature research in previous journals was conducted to identify the inhibiting factors causing project delays. This analysis ranks project delays to identify the most dominant parties causing construction project delays. The results of this study found that all parties involved have the potential to be inhibitors and causes of delays, thus identifying and assessing the greatest potential causes of project delays. These findings are expected to be a guideline for proposing new strategies in implementing construction projects. Key words: Dominant Factors, Inhibitors of Project Implementation, Construction Industry
The Influence of Perceived Accessibility and Highway Nuisance on Residential Satisfaction: Case Study in Serang-Panimbang Toll Road
Investment in roads such as toll roads is considered a catalyst for regional connectivity. On the other hand, there are negative and positive externalities that are felt in the area where the infrastructure is being developed. This research was conducted to identify the influence of perceived accessibility and highway nuisance experienced by residential areas due to the presence of new road infrastructure, specifically the Serang-Panimbang Toll Road. This research studied the extent of the impact of the perceived trade-off between increased accessibility and nuisance highway activities on residential satisfaction and the desire to move. The Structural Equation Modeling - Partial Least Square (SEM-PLS) method was used to examine the framework of influences shaping residential satisfaction. The analysis was based on a survei collected from 603 respondents lived within a 1000m radius of the Serang-Panimbang Toll Road Section 1, covering 3 districts/cities: Serang City, Serang Regency, and Lebak Regency. The constructs include components of perceived highway nuisance, perceived accessibility, perceived and residential characteristics, and socioeconomic characteristics. The results show that perceived highway disturbances (such as perceived noise, air pollution, and interaction restrictions/barrief effect), residential characteristics, and socioeconomic characteristics do not have a significant effect on residential satisfaction. However, increasing perceived accessibility (such as perceived destination attributes, activity distribution, travel resistance, and transportation supply) and perceived occupancy are important factors in increasing residential satisfaction. The results also show that perceived residential satisfaction still increases the moving intention.
Analisis Kepuasan dan Preferensi Pengguna terhadap Moda Angkutan Umum dan Transportasi Online di Rantepao, Kabupaten Toraja Utara
Rantepao, as the capital of North Toraja Regency, experiences high social and economic activities that require an effective transportation system to support daily mobility. This study aims to analyze user satisfaction and preference toward online transportation and public transport in Rantepao. Data were collected through a questionnaire survey involving 200 respondents, consisting of 100 online transportation users and 100 public transport users. The analyzed variables include safety, service availability, fare, and service quality. Data analysis was conducted using multiple linear regression to examine factors influencing user satisfaction and binary logistic regression to analyze mode choice preference. The results indicate that user satisfaction with public transport is significantly influenced by fare, while satisfaction with online transportation is influenced by service availability, fare, and service quality. The binary logistic regression results show that service availability and safety increase the likelihood of choosing online transportation, whereas fare tends to encourage the selection of public transport. These findings highlight the importance of service characteristics in shaping transportation satisfaction and mode preference in Rantepao.
Analisis Penerapan Value Engineering (VE) pada Proyek Konstruksi Menurut Persepsi Owner
The implementation of VE in the construction sector is an approach carried out systematically by a team from many disciplines that focuses on value and function. The implementation of VE in construction projects has the potential for significant savings from the project budget. In the construction world, project owners are often faced with various constraints such as budget constraints, increasing material costs, and the need for time efficiency. VE offers a solution to overcome these constraints with a functional analysis-based approach that aims to increase value by reducing unnecessary costs without reducing the quality of the final product. The implementation of VE carried out in construction projects, the techniques and alternatives used vary, this is due to the approach used, cultural conditions, and different procurement systems. The purpose of this study is to identify VE practices in Indonesia, examine the success factors in these practices, knowledge and experience of VE, and the constraints often faced in VE practices. The research method was carried out by distributing questionnaires to respondents who had knowledge of VE. The data obtained from the questionnaire were analyzed using descriptive analysis. The results of the analysis show that the implementation of VE in Indonesia is carried out on projects that are being proposed and on projects that are underway, the knowledge and experience of construction actors are the main success factors, construction actors have sufficient knowledge about VE, and the lack of knowledge about VE is the main obstacle in the implementation of VE in Indonesia.
Analisis Kepuasan Pengguna Jalan pada Akses Pendidikan di Kabupaten Toraja Utara
This study aims to analyze the level of road user satisfaction on three access roads leading to educational areas in North Toraja Regency, namely the Rantepao–Palopo, Rantepao–Sa’dan–Batusitanduk, and Rantepao–Bolu corridors. Data were collected through questionnaires administered to 312 respondents who actively use these routes. The research instrument was tested using validity and reliability tests, and all variables were found to be valid and reliable. Descriptive analysis revealed variations in user perceptions across road classes. The Customer Satisfaction Index (CSI) was employed to measure overall satisfaction and indicated that the national road section achieved the highest satisfaction score, followed by the provincial and district roads. Multiple linear regression analysis was conducted to determine which service attributes significantly influenced user satisfaction. The results show that, for the provincial road, traffic flow, environmental comfort, and traffic management significantly influenced satisfaction, while for the district road, pavement condition and traffic flow were the primary determinants. Importance–Performance Analysis (IPA) was used to identify priority improvements for each road section, demonstrating that different strategies are needed depending on the characteristics of each road class and user perception. The findings of this study are expected to support decision-making and planning efforts aimed at improving road service quality in educational access areas in North Toraja.
Rekayasa Nilai dalam Tahap Reviu Perencanaan Konstruksi (Studi Kasus: Pelabuhan Perikanan Terintegrasi di PPN Pengembangan Bali)
The ongoing construction of the project requires a fairly large allocation of funds, and it is necessary to reconsider whether the design used is optimal. This can be done by reviewing the project planning design so that it is possible to make cost savings by identifying and reducing unnecessary costs without reducing the level of quality, reliability and function of the project itself. Carrying out value engineering techniques, namely carrying out cost analyzes by comparing the costs per item with the details of each job from the contractor's offer to find the cheapest price up to the negotiation stage for cost savings and efficiency. The AHP (Analytic Hierarchy Process) method can be used as a solution to problems in finding decisions, and for assessment using a Likert scale questionnaire. Value engineering in the planning review by taking a case study of an ongoing project in the Pengambengan area of ​​Bali, namely the integrated fishing port project. There are 3 alternatives compared to the planning budget, namely breakdown analysis techniques (Work Breakdown Structure), cost modeling techniques (Cost modeling techniques), and Delphi techniques (Delphi Teqhnique). In value engineering, you can see the price comparison for each work item for planning reviews. The results for the final review based on value engineering RAB planning estimate Rp. 1,626,877,637,500. The stages in the AHP method analysis are determining the objective of the analysis, namely value engineering in selecting contractors, determining the analysis criteria: Cost Budget Plan, Detailed Drawings, Technical Specifications, and Implementation Time, as well as determining alternative options
Analisis Kinerja Konsultan Manajemen Konstruksi Proyek EPC pada Pembangunan Fasilitas Pengolahan Batu Bara di Tanjung Enim, Sumatera Selatan
Engineering, Procurement, and Construction (EPC) projects face complex challenges such as multidisciplinary coordination, tight schedules, material procurement risks, and design change dynamics, which require the crucial role of Construction Management Consultants (CMCs) in ensuring the achievement of time, cost, and quality targets. This study analyzes the influence of expert competence, quality management, and communication on CMC performance in the coal processing facility construction project in Tanjung Enim, South Sumatra. The study employs a quantitative approach using research instruments developed based on indicators of expert competence, quality management, and communication. Instrument validation was conducted using item analysis with Pearson's product-moment correlation coefficient, while reliability was measured using Cronbach's Alpha coefficient. Data were analyzed using partial correlation and multiple regression techniques. The results of the study indicate: (1) Expert competence has a significant positive effect on KMK performance (ry1 = 0.377 > 0) with the regression equation Ŷ = 19.843 + 0.144 X1; (2) Quality management has a significant effect (ry2 = 0.543 > 0) with the equation Ŷ = 19.040 + 0.174 X2; (3) Communication makes an important contribution (ry3 = 0.471 > 0) with the equation Ŷ = 19.590 + 0.152 X3. Multiple regression analysis shows that the three variables together explain 82% of the variance in performance (ry123 = 0.9272 > 0) with the equation Ŷ = 3.9547 + 0.200 × X1 + 0.1995 × X2 + 0.2237 × X3. These findings confirm that the performance of construction management consultants on EPC projects is significantly influenced by expert competence, quality management, and communication. The study recommends the need for standardization of competencies, implementation of an integrated quality management system, and development of an effective communication model to improve the performance of CMC on similar projects.
Perbandingan Biaya dan Waktu Pelaksanaan Konstruksi Bekisting Konvensional dan Sliding Form pada Pekerjaan Konduit di Bendungan Cijurey Paket 1
In the Cijurey Dam Package I conduit construction project, formwork technology is an important aspect because it is entirely the responsibility of the contractor, so the implementation risks need to be minimized. Initially, the concrete casting method used conventional formwork that was made directly at the project site. However, developments in the construction world demand more efficient methods, leading to the emergence of alternatives such as the use of prefabricated formwork. One type used is sliding formwork. This study aims to evaluate the cost and time effectiveness between conventional formwork and sliding formwork, as well as analyze the reasons for their selection in the Cijurey Dam Package I conduit work. The research method was carried out by calculating the estimated cost and duration of conventional formwork, then comparing the results with the data on the use of sliding formwork in the project. The results show that the Cijurey Dam Package I Construction Project used sliding formwork at a cost of Rp 185.185,00 per square meter, with a cost difference of Rp 342.819.286,34 or about 12,37% cheaper than the calculation using conventional formwork, which averaged - average of Rp 211.332,06. In addition to cost and time considerations, sliding formwork has a faster construction time of 2 hours per tunnel block conduit compared to conventional formwork.
Perbandingan Biaya dan Waktu Pelaksanaan Deck on Pile dengan Cakar Ayam Modifikasi pada Pembangunan Dermaga Jakarta International Container Terminal 2
Indonesia as a maritime country is required to be able to follow the development of the international world to become the world's maritime axis, by developing medium and large ports and encouraging investment in the maritime sector on a large scale. Trisakti Terminal, Tanjung Priok branch, North Jakarta is a busy terminal among ten other terminals managed by PT. Pelabuhan Indonesia I (Persero) which serves general cargo and dry bulk types both domestically and internationally. This study aims to compare the efficiency values ​​obtained from the application of deck on slab foundations with modified spread footing foundation (Cakar Ayam Modifikasi). In the construction work of modified spread footing foundation, the cost of the work is Rp51,099,780,000, with an implementation time of 240 calendar days, while in the construction of Deck on Pile the total cost of the work is Rp88,160,700,000, with an implementation time of 240 calendar days, strict supervision is needed after concrete piling because the remaining implementation time is 14 weeks. The cost efficiency of the modified spread footing foundation work on Deck on Pile is 40%, while the time efficiency of the modified spread footing foundation work on Deck on Pile is 11%.
Pengaruh Konsep Park and Ride pada Manajemen Lalu Lintas di Kawasan Terminal Bubulak Bogor
Bogor City is an area located in West Java Province, Indonesia. This area is located 50 km south of Jakarta and 120 km southwest of Bandung City. With an annual population growth rate of ± 1.53 percent, the population of Bogor City in 2020 is ± 1,081,009 according to the Bogor City Central Statistics Agency (BPS). The city of Bogor has an area of 118.5 square kilometers. This research was conducted to determine the feasibility level of the Park and Ride development plan in Bogor City, especially at Bubulak Terminal. Traffic counting and identification surveys were carried out on main roads which were then processed using Microsoft Excel to determine parking accumulation and determine fluctuations in motorbikes and cars. Next, the interview data was processed to determine the number of people's interest in the development of Park and Ride based on gender, age, trip duration, purpose of trip, parking duration, monthly fuel expenditure, desire for parking rates and those who agreed to use Park and Ride at the time the survey was conducted. At 06.00-21.00 WIB on the road in the Bubulak Terminal area. From the results of data processing using Microsoft Excel, it was found that the characteristics of Park and Ride facility users and also the number of requests for Park and Ride facility users for motorbikes was 2349, while for cars it was 272 with a planned lifespan of up to 2021, this proves the need for increased interest in construction of Park and Ride at Bubulak Terminal, Bogor City. Keywords: Park and Ride, Bubulak Bus Station, Urban Transportation.
Penilaian Kondisi Permukaan Jalan Metode Pavement Condition Index (PCI) pada Ruas Jalan Kapten Piere Tendean Kota Tegal
Roads have a crucial role in supporting mobility movement and allocation of goods and services, significantly impacting economic, social, and cultural growth. Damaged road conditions can impade activities and increase the risk of accidents. Road safety is influenced by various factors, including the road itself. Kapten Piere Tendean Street, part of the North Ring Road, is one of the vital routes is currently experiencing various types of damage, partly due to the increasing traffic volume. This papper aims to evaluate the surface condition of Kapten Piere Tendean street using the Pavement Condition Index (PCI) method for identify categories and levels of road damage as a basis for repair recommendations. The identification results show 13 types of damage, with the highest being shoving at 36%. At STA 0+00 – 0+100, the PCI score is 7, categorized as failed, while at STA 1+300 – 1+400, the PCI score is 92, categorized as excellent, with 32% of segments classified as very good. The average PCI score for the 2.9 km road length is 61, indicating the road is in good condition. The repair recommendations refer to Bina Marga guidelines, addressing the largest damage (shoving) with pothole patching (P5) and leveling (P6).
Optimalisasi Penerapan Sistem Rainwater Harvesting (RWH) di Lingkungan Politeknik Negeri Bandung dalam Rangka Konservasi Sumber Daya Air
This study aims to optimize the Rainwater Harvesting (RWH) system at Bandung State Polytechnic as a strategy for water resource conservation and strengthening the Green Campus concept. The research was conducted by identifying the existing condition of the RWH system at 25 campus building points, analyzing hydrological potential using BMKG rainfall data from 2014–2024, as well as evaluating efficiency and developing technical optimization recommendations. The existing RWH system is dominated by tanks with a capacity of 1,050–2,000 liters, which do not yet function optimally due to limited capacity, channel blockages, and variations in pipe diameter. The analysis shows an average annual rainfall of 2,831 mm with a potential rainwater catchment of up to 70 m³ per month, sufficient to meet 25–30% of the campus's non-potable water demand. System optimization is proposed by increasing tank capacity to 5,000–10,000 liters, using 3–4 inch pipes, and implementing multi-layer filtration and automated control, thus increasing system efficiency to 40–60%. The integrated system prototype in classrooms and laboratories has been proven to reduce PDAM water consumption by 40% and surface runoff by up to 35%. The research outcomes support the achievement of UI GreenMetric water conservation indicators and contribute to the realization of Sustainable Development Goals (SDGs) points 6 and 13. This study provides recommendations for an adaptive RWH system replication model for other educational institutions in Indonesia to manage water resources sustainably and efficiently.​
Implementasi dan Pengendalian Sistem Manajemen Keselamatan dan Kesehatan Kerja (SMK3) terhadap Kinerja K3 pada Proyek Konstruksi
Occupational Safety and Health (OSH) is a crucial aspect in construction projects, which are characterized by a high risk of workplace accidents. Improving OSH performance requires effective implementation of the Occupational Safety and Health Management System (OSHMS) as well as continuous control mechanisms. This study aims to analyze the effect of OSHMS implementation and control on OSH performance in construction projects. A quantitative approach was employed using a survey method by distributing questionnaires to respondents directly involved in construction project activities. The collected data were analyzed using the Partial Least Squares–Structural Equation Modeling (PLS-SEM) method. The results indicate that OSHMS implementation has a positive and significant effect on OSH performance. In addition, OSHMS control also has a positive and significant effect on OSH performance, although its influence is lower than that of OSHMS implementation. These findings suggest that the implementation and control of OSHMS are complementary aspects in improving OSH performance in construction projects.
Local Entrepreneurs Involvement in the Procurement of Goods and Services by the Regional Government (Case Study: Construction Service Business Entities in Banten Province)
The Banten Provincial Government continues to encourage the involvement of local business actors in procurement of goods and services. This is an effort to encourage job opportunities and economic equality in Banten Province. In 2024, the construction business sector will contribute 11.69 percent to the Banten Province economy. The objectives of this study are: 1) To analyze the distribution of local entrepreneurs' involvement in construction and consulting projects in Banten Province. 2). To determine the level of local entrepreneurs' involvement in construction and consulting projects in Banten Province. 3). constraints that influence the involvement of local entrepreneurs in construction services & consulting services projects in Banten Province. The research method is literature study and in-depth interviews with purposive sampling. The research location is Banten Province. Data analysis is descriptive analysis and the relative importance index (RII) calculation method. Construction Service Business Entities (BUJK) in Banten Province have 2,261 BUJK. The distribution of local business involvement in construction projects is generally concentrated in Tangerang Regency, namely 607 BUJK or 26.847%. Contractor services in Banten Province are 92.26% and Consultant services are 7.74%, where the amount varies in each Regency/City. The level of involvement of local business actors in Banten Province in construction projects is 70.01%. Meanwhile, the involvement of local consultant entrepreneurs is 29.99%. The obstacle for local entrepreneurs not being able to get involved in their own business environment (company domicile) is 60.4% because the work is only controlled by certain individuals and 18.9% stated that local entrepreneurs lack the finances to carry out government projects.
Penerapan Metode Building Information Modeling (BIM) 5D dalam Pembangunan Rumah Tinggal
Technological advances in the construction world are beneficial, among others, to support modeling, planning, cost estimation, mass changes, building continuity, and building management. A technology that is widely used in the construction industry is Building Information Modeling (BIM). Accuracy in estimating construction costs is necessary to achieve an effective value during the planning process. Budgeting for development projects still uses traditional methods for much better results. Therefore, this study uses the concept of 5D dimensional BIM to analyze the volume and cost using the concept (BIM) with conventional methods on the work of the 2-story structure of a type 170 house in Balikpapan City. The results of the research on the construction structure of a 2-story home in the city of Balikpapan using the 5D BIM concept with a concrete volume of 2661.69 kg for Rp 46,812,00389.24 and a concrete volume of 27.13 m3 for Rp 56,203,185.16. The difference in iron volume is 19.52%. Meanwhile, the difference in concrete volume is 15.60%, which means that the calculation using the 5D Building Information Modeling (BIM) concept supported by Autodesk Revit software is lower than planned.
Evaluasi Aksesibilitas Fasilitas Penyandang Tunadaksa dan Tunanetra di Stasiun Duri Menggunakan Metode Promethee
Duri Station is a transit station for KRL passengers Commuter Line Tangerang-Duri PP, KRL relations Commuter Line loop line Cikarang, and Commuter Line Soekarno-Hatta Airport with an average passenger capacity of ±10,000 passengers/day. Overcrowding often occurs and causes the movement of passengers and people with disabilities to become hampered. This research aims to evaluate the suitability of special facilities for the disabled and visually impaired at Duri Station, rank proposals for improvements and development of special facilities for the disabled and visually impaired at Duri Station, and provide recommendations to Duri Station regarding special facilities for the disabled and visually impaired that need immediate improvement and development. This research uses the method purposive sampling to select respondents based on specific criteria used as samples in this research. Data processing is carried out using the method PROMETHEE to assess and rank the facilities that need immediate repair and improvement at Duri Station. The research results show that several facilities at Duri Station, such as platforms, waiting rooms, disabled toilets, prayer rooms, lifts, ramps, guideways/guiding block, and the disability counter does not comply with the provisions stated in PM No. 63 of 2019 and PUPR Ministerial Decree no. 14/PRT/M 2017. Ranking using method PROMETHEE resulting in a priority ranking for improving facilities for the disabled according to users, namely increasing sufficient free space in disabled toilets for wheelchair users to maneuver 180° and to open and close doors with a value net flow of -0.396. The main priority for the blind that needs to be improved and improved is the availability of priority seats in the Duri Station waiting room with mark net flow of -0.663.
Evaluasi Jaringan Drainse Perkotaan di Jalan Raya Kemang, Kabupaten Bogor
Inundation on Jalan Raya Kemang (the Parung-Bogor road section in the Kemang area) is a common problem, especially during the high-intensity rainy season, disrupting public mobility and causing traffic congestion. This study aims to identify the factors causing the inundation and to evaluate the existing conditions of the drainage network system in the area. The methods used include hydrological and hydraulic analysis. Hydrological analysis is utilized to calculate the design flood discharge, while hydraulic analysis is used to analyze the capacity of the existing drainage channels.The results of the hydrological analysis show that the total design flood discharge from upstream to downstream is 1.08 m³/s. The hydraulic analysis on the existing channel dimensions of (1.2 x 1) meters indicates a channel capacity of 1.51 m³/s. Theoretically, the channel dimensions are capable of accommodating the design discharge. However, field observations show that the main factor causing the inundation is the presence of mud and sand sedimentation, approximately 30 cm high, inside the channels. This sedimentation causes a significant reduction in flow capacity. After accounting for the sedimentation, the channel capacity decreases to 0.962 m³/s, which is smaller than the design discharge at the inundation point (0.977 m³/s), causing water to overflow onto the road. Furthermore, the lack of drainage inlets is also a contributing factor to the inundation.It is concluded that the inundation on Jalan Raya Kemang is not caused by inadequate channel dimensions but rather by high sedimentation and a lack of drainage inlets
Analisis Tingkat Kepadatan Timbunan Batu Menggunakan Pengujian Water Replacement di Ruas Tol Probowangi Paket 3B
This study evaluates the compaction level of mountain-excavated rock fill used as subgrade material on the Probolinggo–Banyuwangi Toll Road, package 3B (STA 23+925–STA 25+550), using the water replacement method. The analysis was conducted by comparing in-situ density with the maximum laboratory dry density to determine the Compaction Ratio (CR) as an indicator of compaction performance. The results from testing on 22 locations indicate CR values ranging from 101.1% to 103.9%, with an average of 102.52%, confirming that field compaction was effective, homogeneous, and exceeded the minimum Standard Proctor requirement (≥100%). The material moisture content was close to the Optimum Moisture Content (OMC), while the predominance of 50–60 cm rock sizes promoted effective particle interlocking. This condition resulted in a stable and dense subgrade with high bearing capacity under traffic loading. These findings confirm the technical feasibility of utilizing locally sourced excavated rock as subgrade fill material, providing a scientific basis for material efficiency, resource optimization, and enhanced quality of toll road construction
Analisis Stabilitas Tanggul Sungai Tondano, Kab. Minahasa, Sulawesi Utara
The Tondano River embankment serves a critical function in safeguarding residential areas and agricultural lands in Minahasa Regency against flood risks. However, according to data from the Regional Disaster Management Agency (2022), approximately 30% of the embankment segments have exhibited structural distress, including longitudinal cracking and subsidence, primarily triggered by internal seepage and toe erosion on the downstream slopes. This study evaluates the structural stability of the embankment at six critical cross-sections (P54, P78, CP7, P126, CP24, and P170) utilizing GEO5 2022 software, employing both the Spencer and Morgenstern-Price limit equilibrium methods. The analytical results indicate that under existing conditions, several sections failed to meet the minimum required safety factor (SF < 1.5), with critical values falling as low as 0.67 at CP7 and 0.76 at P126. While the implementation of Type III-n sheet piles with a 12-meter penetration depth was modeled at P54 and P126, the resulting deformations exceeded the structural capacity, necessitating the integration of gabion structures to provide additional passive resistance. This combined reinforcement strategy successfully increased the safety factor to 1.91 for P54 and 1.86 for P126. Based on these findings, the study proposes three distinct design classifications: Type 1 (integrated sheet pile and gabion system), Type 2 (stand-alone sheet pile), and Type 3 (unreinforced). Additionally, the installation of riprap protection is highly recommended across all downstream slopes to mitigate long-term erosive effects.
Perencanaan Angkutan Khusus Mahasiswa Universitas Pendidikan Nasional
The National Education University (Undiknas) Denpasar Bali, is facing transportation challenges due to the increasing number of students, consisting of 6,592 students. The high use of private vehicles by 43% of students causes traffic jams and environmental degradation around the campus. To overcome this problem, good transportation planning is needed, including the provision of campus buses. This research analyzes student characteristics, determines routes, analyzes special transportation operational systems and vehicle operational costs. Methodology This study uses quantitative and descriptive methods with primary and secondary data. Of the potential students who agree to move using special transportation, 95% agree and 5% disagree. This special transportation uses one route, namely: Jl. Sunset road – Jl. Bypass Ngurah Rai – Jl. Diponogoro – Jl. Raya Sesetan – Jl. Sidakarya – national educational university with a distance of 19.7 km. Special transportation operates with mini buses that can accommodate 16 people with operating times running from 08.00 WITA to 17.00 WITA. With a planned speed of 40 km/hour, travel time 30 minutes, circulation time 69 minutes, number of routes = 7, headway 30 minutes and number of vehicles = 3 vehicles. And the analysis that has been carried out shows that the vehicle operating costs on the student route (Route I) are Rp. 18,719,525 per vehicle/km.
Analisis Potensi Keruntuhan Bendungan Bringe Akibat Overtopping dan Pemetaan Area Terdampak dengan Menggunakan HEC-RAS 6.6.0
Dams are vital infrastructure that play an important role in irrigation water supply, flood control, and water resource conservation. However, dam failure can lead to catastrophic flooding that threatens human lives and causes significant material losses. This study aims to analyze the potential failure of Bringe Dam due to the overtopping mechanism and to identify the characteristics and distribution of flood inundation in downstream areas using the HEC-RAS 6.6.0 software. The simulation results show that the dam failure due to overtopping produced a peak outflow discharge of 103.69 m³/s with a breach formation time of approximately 1.24 hours. The maximum inundation area reached 77.49 hectares, affecting several villages downstream, with a maximum water depth of 8.11 m and an average depth of 2.07 m in the affected areas. Based on these results, it can be concluded that Bringe Dam poses a high hazard potential in the event of a failure caused by overtopping. Therefore, mitigation measures such as increasing spillway capacity, monitoring water surface elevation regularly, and developing an emergency response plan and evacuation routes for downstream communities are highly recommended.
Hambatan dalam Penerapan Konstruksi Berkelanjutan pada Penyelenggaraan Infrastruktur
The construction industry has an important role in economic growth, but construction activities have a significant impact on the environment, so the implementation of sustainable construction is very important. This study aims to evaluate the extent of the application of sustainable principles in infrastructure implementation in East Nusa Tenggara Province and identify the main obstacles. The data collection method used questionnaires and interviews with 33 Commitment Making Officials (PPK). The data obtained was analyzed using mean and standard deviation statistical analysis as well as content analysis to obtain the constraints. The results of the analysis show that the percentage of sustainable construction implementation in NTT is 77.32%, which is included in the predicate of "Intermediate" according to the Regulation of the Minister of PUPR No. 9 of 2021. The general planning stage recorded the highest percentage (83.12%), while the demolition stage recorded the lowest percentage (60.61%). The main obstacles found include lack of data on marginalized groups, budget constraints at various stages, and low understanding of implementers on the concept of sustainable construction. Improved coordination between parties and better resource allocation are needed to optimize sustainability practices throughout the life cycle of infrastructure projects in NTT.
Pengaruh Bioaspal terhadap Modulus Kekakuan Bitumen Asbuton (Dynamic Shear Rheometer dan Pendekatan Model Matematis Ullidtz)
This study investigates the effect of bio-binder addition on the stiffness modulus of Buton asphalt (Asbuton) bitumen using the Ullidtz mathematical approach and Dynamic Shear Rheometer (DSR) testing. Asbuton B 50/30 was modified with bio-binders derived from pyrolysis of coconut shells (BTK) and rice straw (BJe). The optimum bio-binder content was determined based on penetration and softening point values comparable to Pen 60/70 asphalt as the control binder. The results indicate that 6.5% BTK and 8% BJe effectively increased penetration and reduced the softening point under RTFOT conditions, demonstrating a significant softening effect. The calculated stiffness modulus (Sbit) from the Ullidtz model and DSR measurements exhibited a consistent decreasing trend with increasing temperature (20–45°C), reflecting the viscoelastic behavior of asphalt. However, the Ullidtz approach generally underestimated stiffness values compared to DSR results, particularly at higher temperatures and for modified binders. An adjustment factor of 1.16 was applied to improve the agreement between both methods. The findings confirm that bio-binders have strong potential as sustainable modifiers to control the stiffness of Asbuton bitumen. While the Ullidtz approach provides a practical preliminary estimation, DSR testing remains more reliable for accurately characterizing the mechanistic and viscoelastic behavior of modified asphalt binders.