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All Journal Bumi Lestari Teknik Sipil dan Arsitektur Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Journal of Degraded and Mining Lands Management Rekayasa Sipil Jurnal Teknik Journal of Geoscience, Engineering, Environment, and Technology RACIC : Rab Construction Research Jurnal Rekayasa Sipil Seminar Nasional Lahan Suboptimal JURNAL SAINTIS APTEK Jurnal Teknik Sipil dan Arsitektur Matriks Teknik Sipil Journal of Infrastructure and Civil Engineering SAINSTEK Jurnal Teknologi & Rekayasa Sipil SLUMP TeS : Jurnal Teknik Sipil Journal of Infrastructure and Construction Technology
Muhamad Yusa
Jurusan Teknik Sipil, Fakultas Teknik, Universitas Riau, Pekanbaru, Provinsi Riau, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics Transportation Other

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ANALISIS KETERLAMABATAN DENGAN METODE STOKASTIK DAN MITIGASI RISIKO (Studi Kasus : Proyek Instalasi Pengolahan Air Limbah B1 Kota Pekanbaru) zulfiandri - zulfiandri; Ari Sandhyavitri; Muhamad Yusa
Racic : Rab Construction Research Vol. 9 No. 2 (2024): DESEMBER
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v9i2.4439

Abstract

The issue of environmental pollution has become a strategic issue because of its chain effects on all aspects of life. The construction of the City of Pekanbaru wastewater treatment facility is aimed at the treatment of domestic wastewater due to the density of the population and economic activity so that the quality of the environment is awakened. In this study, the risk of delay in the construction of a sewage treatment facility B1 in Pekanbaru was identified using the Relative Importance Index. (RII). The actual work duration is delayed against the duration of the original plan. Risk analysis uses a stochastic approach to the duration of work. In this analysis, the probability distribution function triangle distribution with 3-point estimate is used. This risk simulation uses @risk software with a maximum of 100,000 iterations. Work in the critical trajectory plays a crucial role in setting the project completion timetable. Initially, the estimated time of execution of the work was 1,075 days. After the analysis (Risk Pert Before Mitigation) the execution time with a 95% confidence rate reached 1,370 days, suggesting a potential delay of 295 days.
PENGEMBANGAN RUMUS KORELASI CLEGG IMPACT VALUE DAN NILAI CALIFORNIA BEARING RATIO PADA TANAH KELANAUAN UNTUK TIMBUNAN Frengki Ashari Aritonang; Muhamad Yusa; Ferry Fatnanta
Racic : Rab Construction Research Vol. 10 No. 2 (2025): DESEMBER
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v10i2.6147

Abstract

In embankment construction, material selection is critical and must meet technical requirements to ensure quality and safety. The California Bearing Ratio (CBR) value is commonly used to determine the soil bearing capacity in supporting loads applied above it. However, field CBR testing is relatively time-consuming, especially for large- scale projects. Therefore, a faster yet accurate alternative testing method is needed. One such alternative is the use of the Clegg Impact Hammer (CIH). This study aims to analyze and develop a correlation formula between the Clegg Impact Value (CIV) and field CBR values, using the Dynamic Cone Penetrometer (DCP) on ML (silt) and MH (elastic silt) soils for embankment construction. The research was conducted in Pomalaa, Southeast Sulawesi through field testing and laboratory testing (soil physical properties). Field tests included DCP and CIH, while laboratory tests covered moisture content and Atterberg limits. The results showed that the silty soils had a moisture content ranging 13.11%-46.95%, liquid limit 32.65%-90.09%, plastic limit 26.62%-59.26%, and plasticity index 5.53%- 33.63%. Field testing (DCP and CIH) showed the best correlation in MH soil at a depth of 20 cm, with an R² value of 0.6979. The resulting correlation formula is %CBR= 0.5896(CIV)1.02. With a correlation coefficient categorized as “strong,” this correlation has the potential to be used as a rapid method for determining CBR values in the field.
EVALUASI KAPASITAS DAYA DUKUNG AKSIAL DAN LATERAL HELICAL PILE MENGGUNAKAN METODE EMPISRIS DAN ANALISIS BATAS TERADAP HASIL PENGUJIAN AKSIAL DAN LATERAL DI LAPANGAN Farian Albajili; Muhamad Yusa; Ferry Fatnanta
Racic : Rab Construction Research Vol. 11 No. 1 (2026): JUNI
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v11i1.6744

Abstract

The construction of deep foundations in operational industrial facilities faces challenges due to the presence of existing buildings and active machinery. Helical piles offer a stable, environmentally friendly, and vibration-free solution that is safe for surrounding structures. This study compares the results of empirical methods and limit analysis in the design of helical piles with field test results of axial loads. The research began with the collection and correction of Standard Penetration Test (SPT) data to a depth of 15 m to determine soil technical parameters. Based on these data, helical pile models with various design configurations were analyzed using empirical methods, limit analysis, and field testing. The results indicate that limit analysis provides axial load capacities that are closer to field test results compared to other empirical methods. The highest capacity was obtained for pile type D1-H1-S1-M piles, which have larger helix and shaft diameters, while differences in test locations meant that pile type D2-H2-S3-SH piles could not be directly compared to the others
TER TINJAUAN TEKNIS DAN EKONOMIS PENANGANAN PERSIMPANGAN JALAN (STUDI KASUS JL. KAHARUDIN NASUTION – JL. PASIR PUTIH KOTA PEKANBARU) Rafli Arie Pradhana; Ari Sandhyavitri; Muhammad Ikhsan; Leo Sentosa; Muhamad Yusa; Ferry Fatnanta
Racic : Rab Construction Research Vol. 11 No. 1 (2026): JUNI
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v11i1.6972

Abstract

Pekanbaru City, as the provincial capital, has experienced significant population growth, resulting in increased mobility and severe traffic congestion, particularly at urban intersections. This study evaluates the performance and feasibility of management alternatives for the problematic Kaharudin Nasution-Pasir Putih intersection. The analysis uses the Indonesian Road Capacity Guidelines (PKJI 2023) for technical performance assessment and the LAPI ITB 1996 method for economic analysis, focusing on Vehicle Operating Costs (VOC), Benefit Cost Ratio (BCR), and Net Present Value (NPV) for the short (5 years), medium (10 years), and long (15 years) terms. The existing condition indicates a poor Level of Service (LOS D) with a Degree of Saturation (DS) of 0.76. Four alternatives were evaluated: Traffic Light Optimization, Road Widening, Adding 1 Lane, and Construction of an Overpass. The results indicate that Alternatives 1, 2, and 3 offer only short- to medium-term improvements. The construction of the Flyover (Alternative 4) is the only feasible long-term solution (15 years), proven to be economically feasible with BCR and NPV values of 1.46 and 55.6 billion rupiah, in the 10th year 3.19 and 270.3 billion rupiah, and in the 15th year 4.79 and 482.3 billion rupiah. which means the benefit value is greater than the costs incurred, so that the construction of the flyover is economically feasible to be implemented to minimize the increasing financial losses due to traffic delays.
EVALUASI KAPASITAS SISI UDARA BERBASIS RUNWAY OCCUPANCY TIME PADA BANDAR UDARA SULTAN SYARIF KASIM II PEKANBARU Michael Exaudi Siregar; Leo Sentosa; Muhamad Yusa; Ari Sandhyavitri; Gunawan Wibisono; Ferry Fatnanta
Racic : Rab Construction Research Vol. 11 No. 1 (2026): JUNI
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v11i1.8194

Abstract

Sultan Syarif Kasim II Airport serves as the main gateway to Pekanbaru City and is planned as a primary hub airport. This study evaluates the existing airside capacity, runway–taxiway limiting factors, traffic forecast, and capacity improvement alternatives. The analysis used airside geometry data, field operational observations, annual aircraft movements, and socioeconomic data. The results show that traffic is dominated by narrow-body jets; therefore, the capacity limitation is mainly affected by the inefficient runway–taxiway configuration, which increases runway occupancy time. The existing mixed-operation capacity is 15 movements/hour, equivalent to 43,800 regular movements/year. The proposed development alternatives can increase the capacity to 30 movements/hour, equivalent to 125,925 regular movements/year.
PENGARUH PASIR, ABU TERBANG, DAN AIR PADA KARAKTERISTIK MEKANIS TANAH LEMPUNG Soewignjo Agus Nugroho; Ferry Fatnanta; Syawal Satibi; Muhamad Yusa; Agus Ika Putra; Gunawan Wibisono
Matriks Teknik Sipil Vol 13, No 1 (2025): Juni
Publisher : Program Studi Teknik Sipil FT UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mateksi.v13i1.101745

Abstract

The shear strength and bearing capacity of soil are influenced by its type, mineral composition, and particle size. Both cohesion and the friction angle play significant roles in determining soil strength, while density is crucial for supporting forces. This study examines the effects of grain size, soil minerals, and water content on the shear strength and bearing capacity of soil. Various tests such as California Bearing Ratio, Direct Shear, and Unconfined Compression Test are conducted on sand and clay, compacted with different numbers of strikes and water contents. The study also explores the impact of organic soil and fly ash on shear strength. Additionally, immersion tests are performed to assess how water absorption affects the soil’s properties. Results show that compression at the optimum moisture content (OMC) produces the highest strength, while compression at higher moisture levels results in greater strength loss compared to drier conditions. At a constant water content, increased soil density leads to higher bearing capacity. Conversely, excess water content reduces the soil's strength. The presence of clay, fly ash, and organic material increases water absorption capacity. In sandy soils, the distribution of grain size significantly influences shear behavior. The addition of clay enhances both the friction angle and soil cohesion, while higher fly ash content tends to reduce the friction angle and improve soil cohesion. Interestingly, cohesion appears to be unaffected by the sand's gradation.  Keywords: bearing capacity, clay, fly ash, shear strength, sand.
Co-Authors Abdul Halim Muqorrobin Abdullah Ihsan Alkubuwi Agisman, Fandy Agus Ika Putra Agus Nugroho, Soewignjo Ahmad Muhammad Akbar, Bagus Muhammad Alex Kurniawandy Ananda, Rizki Fajri Andy Hendri, MT, Andy Anggara, Vebrian Annisa Soraya Hasibuan Ari Sandhyavitri Arifan Farhan Arifin Arifin Ary Iqbal Azizah . Bambang Sujatmoko Daly Riandi Daniel Irfan Dian Paramita Edria Dianjani Eka Saputra Eko Soebowo Elianora - Endala Siboro Esther RA Fadli Dirga Subardi Farian Albajili Ferry Fatnanta Fitri Herawati Frans Rezal Frengki Ashari Aritonang Frimadofi Frimadofi Genta Putra Adietama Gina Khusnul Khotimah Gunawan Wibisono Gunawan Wibisono Gustika, Rani Ardeylina Hanif, Ardian Hasibuan, Putra S Hendra Saputra Himmatul Azizah Indradi Wijatmiko Jannika Suhelmi Jufri, Afdirman Koichi Yamamoto, Koichi Kusairi, Muhammad Leo Sentosa Lisa Trisnawati Lita Darmayanti Michael Exaudi Siregar Muhamad Azizi Muhammad Ikhsan Muhammad Naufal Muhammad Riyan Sabri Muhammad Shalahuddin Muhammad Shalahuddin Muhammad Taufik MUHAMMAD TAUFIK Muhardi Muhardi Muhardi Muhardi Nova, Septi Devita Nurul Qomar Oki Chandra Ongko, Andarsin Panji Tegar Aji Pratama, Deni Rafika Rani Zainuddin Rafli Arie Pradhana Rahmatul Irfan Rakhmat Minanggi Purba, Rakhmat Minanggi Ridho Ilahi Rinaldi Rinaldi Ronny Tigor Sitanggang Ropiska Alfareza Satibi, Syawal Sihaloho, Dodi Seprades Simanjuntak, Lambok Jadiaman Soewignjo Agus Nugroho Soewignjo Agus Nugroho Sutikno, Sigit Vebrian Anggara Wahyu Frisnel Wardani, Khusnul Setia Yondriadi Yondriadi Yoyon Kurniawan zulfiandri - zulfiandri Zulkifli Zulkifli