Jurnal Ilmiah Rekayasa Sipil

Perbandingan Efektivitas Metode E-tendering dan E-purchasing dalam Pengadaan Proyek Konstruksi Pemerintah

Putria Rahmadani — 2025-10-14

This research aims to compare the effectiveness and efficiency of two electronic procurement systems, namely e-tendering and e-purchasing, in the procurement of goods and services for government projects in Padang City, West Sumatra Province. The lack of comparative studies on the effectiveness of both procurement systems from the perspective of construction service providers highlights a significant research gap to be further explored in the context of construction project implementation. This study employs a mixed-method approach, incorporating a quantitative method through a questionnaire with a Likert scale distributed to 34 construction service providers, and a qualitative method via semi-structured interviews with these providers. Data analysis in this study uses paired sample t-tests to test the significant differences in perceptions between the two systems. The results of this research indicate that e-tendering has a higher average value compared to e-purchasing, signaling a statistically significant difference. E-purchasing is considered superior in efficiency. In contrast, e-tendering excels in aspects of effectiveness, transparency, fairness, and accountability, making it more suitable for complex procurements that require in-depth evaluation. This study concludes that the choice of procurement system needs to align with the characteristics and complexity of the project. E-tendering is more appropriate for competitive procurements, while e-purchasing is suitable for standard and repetitive processes.

Pengaruh Dinding Pada Perilaku Struktur Portal Beton Bertulang Akibat Beban Gempa

Bartholomeus Bartholomeus — 2025-10-30

A building structure is a series of construction elements that function to support and provide stability to the building. In a single building unit, walls are one of the elements that cannot be separated from the unit. Walls are usually used as partitions or room dividers as well as building enclosures. Based on several previous studies, it is explained that the presence of infill walls in a building can contribute significantly to structural stiffness in resisting existing lateral loads. This study aims to compare the behavioral analysis of structures consisting of Open Frame Structures (SRB), Partially Open Frame Structures (SRBS), and Closed Frame Structures (SRT) due to earthquake loads. In this case, for SRBS and SRT structures, walls are modeled as Strats determined based on the FEMA 356 Method and the Sukrawa and Budiwati Method. The behaviors reviewed include structural stiffness based on deformation on each floor, structural period, and base shear that occurs. As a research material, a three-story reinforced concrete building structure serving as a Flat located in West Nias Regency will be reviewed. The earthquake load analysis used is a dynamic load analysis of the response spectra for medium soil, based on the building's location. Structural analysis was conducted using a structural analysis program that uses the Finite Element Method (FEM)

Rekomendasi Tindakan Keterlambatan Proyek Pada Rentang Dan Periode Durasi

Syafriandi Syafriandi — 2025-10-30

A problem in construction projects is delays. The duration of the delay varies, some are only a few days, a weeks or months from the contract plan. Knowing early about of project delay is very important in order to determine what recommendations will be given to minimize delays. This research aims to find the period and range of delay duration and recommendations for actions to be taken. The research method was carried out by questionnaires to 11 respondents, who are members of Perkumpulan Ahli Penjadwalan Proyek Indonesia (PAPPI) with the positions of project manager, site manager and scheduler; have a minimum of 5 years of experience in the field and a minimum education of S1. The questionnaire contains 19 questions that respondents must answer regarding indicators of causes of project delays, periods delays, duration ranges dan recommended action. The research results showed that the cause of the delay was if the project completion time moved behind the contract target, a project delay period of less than 1 week with a duration range of 1 to 6 days (condition 1), a delay period of between 1 to 2 weeks with a duration range of 7 to 13 days (condition 2) and a delay period of 2 weeks and above with a duration range of more than 14 days (condition 3). Recommended for condition 1 are to carry out supervision so that performance effectiveness can be improved, for condition 2 to accelerate duration and condition 3 must be rescheduled by re-analyzing the duration of work, work dependency and find new methods/strategies. The recommendations make it easier for the project team to take management action so that the project avoids delays.

Analisis Efisiensi Pengendalian Lalu Lintas di Simpang Empat Jalan Padang Bypass � Jalan Moh. Hatta

Buyung Oktorizal — 2025-10-30

Padang Bypass Road Intersection � Jalan Moh. Hatta in Padang City is an intersection with high traffic volume, because it connects access to Minangkabau International Airport, Teluk Bayur Harbor, Andalas University, and Pasar Raya Padang. Traffic management at this intersection uses APILL with four phases. Increased vehicle flow causes delays and queues, An assessment of signalized intersection performance was considered essential. The evaluation applied the MKJI 1997 procedure based on survey data collected during the morning peak period. The results demonstrated a saturation degree (DS) above 0.85, classified as level of service (LOS) E., which indicates a saturated dense condition. The average delay per approach reaches more than 85 sec/pcu, and the queue length is between 133�173 m. The existing cycle time (141 seconds) is lower than the calculation results (185 seconds) and the optimum cycle (193 seconds). Improvements are recommended through adjusting signal times, increasing geometric capacity, and coordinating between intersections. Key words: Signalized intersection, degree of saturation, performance, delay, queue length.

Analisis Willingness dan Ability to Pay Pelajar Pengguna Sepeda Motor ke Sekolah Untuk Skema Parkir Berbayar Virtual

Gusri Yaldi — 2025-10-31

The road traffic accident (RTA) is one of the negative impacts from transport sector, especially RTA involving motorcycles. According to WHO, the fatality due to RTA is dominated by motorcycles by up to 74%. The motor vehicle number in Indonesia grows by 4.83% per annum. Yet, the motorcycle growth rate is higher which is 5.14% annually. The latest recorded motor vehicle number is more than 157 million units, and motorcycles contributes more than 132 million units or equals to 84.21%. This figure could further increase the RTA number, in particular among students who use motorcycles to schools. Therefore, efforts to control the usage of motorcycles must be undertaken. For example, by managing the parking supply at schools. This research is aimed at analyzing the students Willingness to Pay (WTP) and Ability to Pay (ATP) towards three different paid virtual parking schemes in senior higher schools in Padang city. The students were randomly selected and then interviewed by means of surveys developed by using revealed and stated preference approaches. The results suggest that the students spent about 13.67% of their monthly allowance for transportation to schools or about IDR3152 per day. It consists of petrol and parking costs. The average daily parking cost is IDR598. The WTP for each paid virtual parking schemes proposed to the students are IDR2709, IDR2616, and IDR3191 for on-street parking (fix parking fare), on-street parking (progressive parking fare), and off-street parking (progressive parking fare) respectively. Meanwhile, the students ATP for parking is IDR2697. The students tend to use motorcycles despite increasing transportation expenses due to the paid virtual parking schemes up to 22.64% of their monthly allowances. This finding suggests that there is a motorcycle dependence among students.

Mitigasi Kecelakaan di Perlintasan Sebidang Kereta Api: Pendekatan Deskriptif pada Jalur Kereta Api Penumpang Aktif di Sumatera Barat

Laela Susdiani — 2025-10-31

Tingginya kecelakaan kereta api di pintu perlintasan sebidang perlu menjadi perhatian serius karena terjadi kecelakaan yang berulang di jalur kereta api Padang�Pariaman, Padang�BIM, dan Kayu Tanam�BIM yang melibatkan kendaraa n roda dua dan roda empat. penelitian ini bertujuan untuk mengidentifikasi dan menganalisis faktor-faktor risiko kecelakaan kereta api di perlintasan sebidang, Selanjutnya rekomendasi mitigasi yang dapat diterapkan oleh para pemangku kepentingan. Riset ini menggunakan pendekatan deskriptif kuantitatif, dimana data yang diperoleh dari intansi terkait dan observasi lapangan di deskripsikan dalam bentuk table dan gambar sehingga diketahui faktor yang mempengarhui terjadi kecelakaan kereta api di perlintasan sebidang.Upaya penanganan/mitigasi kecelakaan kereta api di pintu perlintasan sebidang dilakukan secara komprehensif baik perbaikan infrastruktur/prasarana keselamatan, low enforcement, Pendidikan keselamatan, dukungan teknologi peingatan dini dan kolabirasi antar pihak

Pengaruh Penambahan Kapur Terhadap Karakteristik Fisik Dan Mekanik Tanah Lempung Di Kabupaten Sorong

Chariol Filipe Pasoi — 2025-10-31

Clay has low permeability and plastic properties, so it needs to be repaired to support the lower construction structures. Sorong Regency is an area with soil conditions characterized by clay, so soil repair is needed before it is used as a construction site. Chemical stabilization using lime is one of the effective techniquesf. The purpose of this study is to determine the physical and mechanical properties of the soil, as well as analyze changes after the addition of lime (5%, 10%, 15%), as well as determine the optimal percentage of lime to improve the stability of the original soil of Sorong Regency. In the implementation of this study, a quantitative method with an experimental test design in the laboratory was used to analyze the data, so that conclusions and answers to research problems can be obtained which include: (1) how the physical and mechanical properties of the original soil change, (2) how the physical and mechanical properties of the original soil change after the addition of lime with a mixture variation of 5%, 10% and 15% and (3) what percentage of the optimal addition of lime can provide the best stability on their original soil. The method in this laboratory test uses SNI standards to test the physical properties (filter analysis, moisture content, specific gravity and atterberg limits) and mechanical properties (standard supervisors and california bearing ratios) of soil samples. The results of the study showed that the soil in Sorong Regency was classified as clay (A-7-6) with a melting limit of 44.93% and a plasticity index of 23.50%. The addition of lime up to 15% is effective in reducing moisture content and plasticity, as well as increasing soil density. The highest CBR value of 5.529% was achieved with 10% lime, making it the optimal percentage for stabilization.

Tinjauan Aksesibilitas Antarmoda Bus Transpadang dan Angkutan Kota Mini Bus di Kota Padang

Ghina Pujadany — 2025-11-01

The increasing number of vehicles in Padang City shows the high dependence of the community on private vehicles, which are far more dominant than the use of public transportation. This study aims to assess the level of intermodal transportation accessibility between Transpadang buses and city transportation in each sub-district, and formulate strategies to improve the interconnection between these modes of public transportation. The method used in this study involved mapping using Google Maps software. The survey was conducted by calculating the travel distance, travel time, number of transits, and costs required to reach between sub-districts from a total of 11 sub-districts in Padang City. The data collected was then analyzed by dividing the accessibility level into three main categories: speed, number of transits, and travel cost. The values of the three categories were summed to produce an accessibility level score for each sub-district. The results show that Nanggalo sub-district has the lowest level of accessibility compared to other sub-districts. This is mainly due to the high number of transits and travel costs, which fall into the low accessibility category.To provide a solution to this problem, an analysis was conducted using the Logical Framework Analysis (LFA) method. This approach is complemented by the development of a matrix as a strategic planning tool. The resulting strategic recommendations include the development of more efficient direct routes, the addition of strategic transfer points to facilitate movement between lines, increasing service frequency, adjusting intermodal schedules to be more integrated, and improving transportation facilities in terms of comfort and safety.The success of this strategy is highly dependent on the active involvement of various stakeholders.

Analisis Dampak Aktivitas Keramba Jaring Apung Terhadap Kualitas Air Danau Maninjau

Rima Novira — 2025-11-01

Danau Maninjau di Kabupaten Agam, Sumatera Barat merupakan danau vulkanik yang berperan penting sebagai sumber air baku, energi, pariwisata, dan perikanan, khususnya melalui budidaya ikan menggunakan sistem Keramba Jaring Apung (KJA). Namun pertumbuhan KJA yang masif dan tidak terkendali telah menimbulkan tekanan serius terhadap kualitas air danau. Limbah organik dari sisa pakan ikan dan ekskresi menyebabkan peningkatan beban nutrisi seperti fosfat dan amonia, yang memicu proses eutrofikasi dan penurunan kadar oksigen terlarut (DO). Fenomena seperti tubo (kematian ikan massal) yang terjadi hampir setiap tahun menandakan terganggunya keseimbangan ekosistem laut. Penelitian ini bertujuan untuk menganalisis dampak aktivitas KJA terhadap parameter fisik dan kimia kualitas air Danau Maninjau serta menyusun solusi mitigasi berbasis teknik sipil. Metode yang digunakan adalah pendekatan kuantitatif-deskriptif melalui pengukuran lima parameter utama, yaitu suhu, pH, total padatan terlarut (TDS), konduktivitas listrik (EC), dan potensi oksidasi-reduksi (ORP), pada 16 titik sampling yang mencakup area budidaya dan area kontrol. Data primer dari pengukuran lapangan diperkuat dengan data sekunder dari Dinas Lingkungan Hidup Kabupaten Agam (2021�2024) dan dibandingkan dengan baku mutu air kelas II sesuai PP No. 22 Tahun 2021 serta Perda Kabupaten Agam No. 5 Tahun 2014. Hasil penelitian menunjukkan bahwa nilai pH melebihi ambang batas, DO mengalami penurunan signifikan, dan terdapat peningkatan konsentrasi fosfat dan BOD dari tahun ke tahun. Sebagai solusi, diusulkan pendekatan teknik sipil berupa desain ulang unit KJA, pembangunan IPAL mikro, sistem pemantauan kualitas udara real-time, rehabilitasi serupa dan zonasi ulang area budidaya. Penelitian ini diharapkan menjadi ilmiah dalam mendukung pengelolaan danau yang adaptif, terintegrasi, dan berkelanjutan.

Pengaruh Beban Terhadap Stabilitas Lereng Menggunakan Metode Janbu di Area Perumahan Indrapuri Pekanbaru

Rendy Fikri Kurniawan — 2025-11-01

Derofizha Permata Housing, located on Jalan Indrapuri, Tenayan Raya Sub-district, Pekanbaru City, is located in an area with hilly land contours that form natural slopes. The unstable slope geometry condition and additional load from infrastructure development and residential buildings are factors that trigger landslide potential. Therefore, slope stability analysis is crucial in planning sustainable development in the area. This study aims to evaluate the effect of load on slope stability using the Janbu Method. The Janbu Method is a boundary equilibrium approach that considers circular and non-circular landslide planes by dividing the slope into several slices and calculating the balance of forces and moments. Data were collected through geotechnical investigations at 12 slope points scattered in a residential area. The soil parameters used included cohesion, deep shear angle, and soil volume weight. The analysis was conducted by comparing the slope safety factor values before and after being subjected to loads. The results showed that the surface load had a significant influence on the decrease of the slope safety factor. The percentage decrease in stability ranged from 4.12% to 18.07%, with an average decrease of 12.52%. The point with the highest decrease indicates a potential collapse that needs serious attention in civil engineering planning. The study concludes that the addition of surface load can significantly reduce slope stability, making it necessary to strengthen the slope or limit the additional load in the vulnerable zone. These results can serve as a reference for housing planners and developers in anticipating landslide risks in hilly areas.

Analisis Kinerja Simpang Bersinyal Menggunakan Metode PKJI 2023 Dan Simulasi PTV Vissim (Studi Kasus: Simpang Gatot Subroto � Buluh Indah, Kota Denpasar

Gede Sumarda — 2025-11-02

The Gatot Subroto�Buluh Indah intersection in Denpasar City is a four-leg signalized intersection that connects the Gatot Subroto Street with Buluh Indah Street, serving as a strategic route to the city center and surrounding residential areas. Traffic problems such as congestion, long delays, and extended queues, particularly during peak hours, highlight the need for a comprehensive evaluation of intersection performance and its traffic control system. This study aims to analyze the existing conditions using microscopic simulation with PTV Vissim based on queue length and delay indicators, and to compare the results with manual calculations using the Indonesian Highway Capacity Manual (PKJI) 2023. In addition, this research formulates recommendations for signal timing optimization through cycle length adjustments to improve traffic efficiency. The simulation results show that the existing condition operates at a low service level, with an average delay of 105.17 seconds/pcu and the longest queue reaching 435.09 meters, categorized as LOS F. The PKJI 2023 analysis produced a maximum degree of saturation (Dj) of 1.94 and an average delay of up to 454.38 seconds/pcu, confirming that the intersection performs inefficiently. Signal optimization using the PKJI 2023 cycle length reduced queue length by up to 47% and decreased average delay by 58% during the morning phase. These findings indicate that combining PKJI 2023 with PTV Vissim provides both a representative evaluation and practical solutions for improving traffic management. Furthermore, the outcomes of this study not only offer practical recommendations for the Denpasar City Transportation Agency but also contribute to the development of intersection performance evaluation methods by integrating manual analysis and microscopic simulation.

Analisis Kekuatan Geser Pada Perencanaan Jalan Tol Sentul - Karawang

Kevin Hutama Syahputra — 2025-11-02

In the planning of the Sentul-Karawang Toll Road, the soil used is Clay Shale. This type of soil has large shrinkage and swelling properties when there is a change in water content, because the strength of a structure will be directly influenced by the ability of the base soil to receive and transmit the working load. The Sentul-Karawang Toll Road Planning Project is currently in the implementation stage with a length of 59,061 KM. from the transverse parameters, it is planned for an inner shoulder width of 1 m, an outer shoulder width of 3 m and a traffic lane width of 4 m. From this study, an analysis was conducted at two locations, namely Sta.4+150 and Sta.9+350 to recommend the necessary treatment for Clay Shale soil. The embankment location will use 1m replacement reinforcement and 10 layers of 200kN Woven Geotextile. The purpose of the Geotextile itself is reinforcement to increase the tensile strength of the soil. From the results of the analysis using Plaxis 2D, the safety factor (SF) value was obtained. The results of the analysis at Sta.9+350 with a 3m embankment height required 1m replacement treatment, the static safety factor value was 5.5 and the earthquake safety factor was 2,702. While Sta. 4+150 embankment with a height of Hmax = 30 m embankment using 10 layers of 200kN Woven geotextile reinforcement obtained a static safety factor value of 2,336 and an earthquake safety factor of 1,178. It can be concluded that the results of the analysis using Plaxis 2D using Geoxtextile Woven 200 kN effectively increase the shear strength of Clay Shale soil.

Faktor-Faktor Derteminan Daya Saing Kontraktor Konstruksi di Sumatera Barat

Budi Ilyas — 2025-11-04

The competitiveness of contractors plays a crucial role in supporting the successful implementation of infrastructure development programs, particularly in regions such as West Sumatra where both central and local government projects are intensively carried out. This study aims to identify and analyze the main factors influencing contractor competitiveness in West Sumatra. A quantitative research design was adopted, utilizing a structured questionnaire distributed to contractors, consultants, electronic procurement services (LPSE), and users of contractor services, with a total of 121 valid responses. From an extensive literature review, 53 variables were identified, which were subsequently reduced to 22 relevant variables. Exploratory Factor Analysis (EFA) was conducted, followed by Horn Parallel Analysis (HPA) to confirm factor validity. The results indicate that 16 variables significantly influence competitiveness and can be grouped into three major factor constructs: (1) Resource Factors, (2) Marketing and Relationship Factors, and (3) Management and Strategy Factors. Further evaluation using Measurement Model Analysis (MMA) with Smart PLS confirmed the convergent and discriminant validity of the constructs, demonstrating that these three factors have a direct impact on contractor competitiveness. The ranking analysis highlights financial capacity, human resources, government relations, organizational structure, and technology as the most critical elements. The findings provide theoretical contributions by strengthening the conceptual understanding of competitiveness factors in the construction sector and practical implications for contractors in West Sumatra to enhance their strategies in a highly competitive environment. Moreover, improving local contractors� competitiveness will contribute to increasing national construction competitiveness.