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Muhamad Yusa
Jurusan Teknik Sipil, Fakultas Teknik, Universitas Riau, Pekanbaru, Provinsi Riau, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Transportation

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Journal : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Pemanfaatan Limbah Beton K 250 Sebagai Substitusi Agregat Kasar Pada Campuran Laston Lapis Antara (AC-BC) Ananda, Rizki Fajri; Shalahuddin, Muhammad; Yusa, Muhamad
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Pavement construction requires aggregate which is non renewable material. Concrete waste such as from cubic test might be recyded. This study investigated marshall characteristic of Asphalt concretebinder course (AC-BC) which used of concrete waste as coarse aggregate substitute. Concrete waste was mixed with fresh aggregate at ratio of 100:0, 75:25, 50:50, 25:75 and 0:100 Asphalt contentvariation are 5%, 5.5%, 6%, 6.5% and 7%. The optimum aggregate contents for each variation are 6.08%, 5.83%, 5.87%, 5.10%, 5.55% respectively. The result show that all variation fulfilled the specification The 75:25 variation is recommended as mixture ratio with high stability value of 1445 Kg, Flow 3.40 mm, VMA 15.30%, VFA 77.50%, VIM 3.40%, MQ 440 Kg/mm and also asphalt content is affordable with 5.87% of optimum asphalt content.Keywords: AC-BC, Concrete Waste, Coarse Agregate
ANALISIS POTENSI LIKUIFAKSI BERDASARKAN UJI PENETRASI STANDAR (SPT) (STUDI KASUS: PEMBANGUNAN FLY OVER JL. TUANKU TAMBUSAI – JL. SOEKARNO HATTA PERKANBARU) Gustika, Rani Ardeylina; Yusa, Muhamad; Fatnanta, Ferry
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Indonesia is the country that located and surrounded by three great continental plates, where the earthquakes are usually happens. This kind of phenomenon has some direct impacts, which one of them is soil liquefaction. Soil liquefaction is a phase transition process from solid to liquid phase due to increasing the pore water pressure that caused by cyclic loading. This study aims to identify the susceptibility of materials to liquefaction phenomenon using the grain size distribution curve, to analyze the safety factor (FS) and liquefaction potential index (LPI). In order to do this study, one bore holes were observed by using standard penetration test (SPT) to evaluate the liquefaction potential phenomenon. The values taken for the peak ground acceleration (PGA) are 0,250 g, 0,288 g and 0,315 g while the values of 5,00, 6,45 and 7,90 were taken as moment magnitude (Mw). The results of this study shows that the materials are susceptible to liquefied based on grain size distributions. Furthermore, the location has a potential of liquefaction, and give values between 0,250-11,084 with a low to very high of LPI category.Keywords: soil liquefaction, susceptibility, safety factor, liquefaction potential index.
Analisis Potensi Likuifaksi Berdasarkan Data Cone Penetration Test Dengan Metode Shibata Dan Teparaksa (Studi Kasus: Sekolah Al-Azhar Pekanbaru) Herawati, Fitri; Yusa, Muhamad; Putra, Agus Ika
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Liquefaction is a condition where the ground loses the shear strength because increased pore water effect from cyclic loads (earthquake loads) very quickly and in a moment. The influence of soil characteristics, Cyclic Stress Ratio (CSR), Cyclic Resistance Ratio (CRR), Factor of Safety (FS), Liquefaction Potential Index (LPI), and settlement soil are crucial to determine the potential liquefaction.The liquefaction analysis using Cone Penetration Test (CPT) data has developed, namely from a mechanical sondir (CPTm) developed into an electrical sondir (CPTe). The calculation method used is the Shibata and Teparaksa Method (1988). The purpose of this research to compare the potential liquefaction based on the results of CPTm and CPTm which was converted to CPTe. This research data is secondary data for the results of CPTm testing taken from the results of soil testing at the time of the construction of the AlAzhar Pekanbaru School Jl. Swakarya, Pekanbaru City. According to the analysis, it can be conclude a higher liquefaction potential is obtained when using CPTm data that has been converted (CPTe). As a results it shows that the Liquefaction Potential Index (LPI) calculated based on converted CPTm data (CPTe) is dominantly greater than the LPI value based on CPTm data with a LPIm / LPIe ratio <1. Keywords: Keywords : Liquefaction, LPI, Shibata and Teparaksa (1988), Electrical Sondir,Mechanical Sondir.
Pengaruh Gradasi Dan Bentuk Butiran Pasir Terhadap Kuat Gesernya Simanjuntak, Lambok Jadiaman; Yusa, Muhamad; Fatnanta, Ferry
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Gradation and grain shape of sand are some of the factors that influence the shear strength of sand. This needs to be considered, so that the effect can be maximized for construction related to sand. The purpose of this research is to find out how to analyzethe shape of the sand grains and analyze the behavior of the angle of friction (ϕ) due to the influence of the grading and shape of the grains. The test is carried out by dividingthe gradation, which consists of three variations with a relative density of 70%. Gradation 1 is dominated by medium granules as much a 100%, gradation 2 is dominated by coarse granules as much a 60%, and gradation 3 is dominated by finegranules as much a 60%. The shape of the sand grains is divided into two forms, namely the group of angular and rounded grains, which are distinguished based on themorphological parameters of the granules namely roundness (R), sphericity (S) and regularity (ρ). The morphological parameters of the granules are analyzed usingimageJ. The results showed that the analysis of grains shape of sand using imageJ, obtained levels of grain shape from the two sands, namely sub-angular and subrounded.The effect of gradation on angle of friction (ϕ) is gradation dominated bycoarse grains of 60%, namely gradation variation 2, and which has a long grain distribution, namely gradation variation 3 has a higher angle of friction (ϕ) compared to gradation variation 1. Comparison of the angle of friction (ϕ) between the grainshape of sand, that is sand with a sub-angular shape has a higher the angle of friction (ϕ) compared to sand with a sub-rounded shape.Keywords: Sand, gradation, particle shape, imageJ, roundness (R), sphericity (S), regularity (ρ), angle of friction (ϕ).
Analisis Perkuatan Lereng Menggunakan Finite Element Method Ongko, Andarsin; Nugroho, Soewignjo Agus; Yusa, Muhamad
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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Abstract

Landslides are ones of disasters which oftenly occurred in Indonesia. This research aims to analyze some slope reinforcements which are modeled by using a based finite element method software, i.e. plaxis v.8.2. As initial data, slope`s dimension was measured from real field, and soil samples were taken to obtain the soil properties. Those data were used as input parameters in modeling. The slope was modeled in several conditions, i.e. existing condition, variation of ground water table, reinforcement with backfill model, terraces model, and soil nailing model. The results shown that safety factor has decreased due to the increment of ground water table. The highest safety factor was reached when the slope was reinforced with soil noiling model, with the magnitude of 2,044.Keywords : landslides, finite element method, soil nailing, safety factor.
Potensi Likuifaksi Pada Tanah Pasir Di Atas Tanah Gambut Dengan Variasi Kuari Melalui Uji Model Laboratorium Ridho Ilahi; Agus Ika Putra; Muhamad Yusa
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
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Abstract

Indonesia is a country that surrounded by three continental plate. The wave dispersion of this tectonic plate caused the bearing capacity of soil decreased until liquefaction is emerged. Some of area in Sumatera, like Aceh, Padang, Bengkulu and also Pekanbaru is nearby with the boundary fault, which is very risk to get the geotechnical problems caused by liquefaction. This research are using shaking table models have function to determine how big is the effect of sand from varies area and vibration acceleration for liquefaction potential. The vibration acceleration varies is using 0,25 g and 0,32 g. The sand from varies area are came from Danau Bingkuang, Garuda Sakti and Sungai Tonang that has different percentage of fine course, medium course and rough course. According to test results, conclusions that can be determined are that Danau Bingkuang has mostly fine course as 54,27% is get the maximum increasing pore water pressure and maximum soil settlement, and include as the one of most potentially to liquefied.Keywords: Liquefaction, Shaking Table, Quarry, ru Rasio, Embankment.
Analisis Konduktivitas Hidrolik Dengan Metode Bouwer and Rice (1976) Panji Tegar Aji; Sigit Sutikno; Muhamad Yusa
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Abstract

Land fires are frequent disasters, especially on peatlands. One of the efforts to prevent fire on peatlands is by building canal blocks. The effectiveness of the canal block needs to be analyzed for its effectiveness to find out whether the canal block can prevent peatland fires. Hydraulic conductivity is one of the parameters used to determine the effectiveness of canal block construction. Hydraulic conductivity is the ability of the soil to drain water through it. The purpose of this study is to find out how much the hydraulic conductivity value of peatlands in Lukun Village and to find out whether the canal blocking construction in Lukun Village is effectively built. The results of this study indicate the value of hydraulic conductivity with the Rice and Bower (1976) method is 0.366 m / day - 14.146 m / day. The value of hydraulic conductivity also shows that the construction of canal blocks in Lukun Village is effective in preventing peatland fires.Keywords: Hydraulic Conductivity, Peatland, Rice and Bouwer (1976)
Potensi Likuifaksi Pada Tanah Timbunan Pasir Di Atas Tanah Gambut Dengan Variasi Berat Beban Melalui Uji Model Laboratorium Oki Chandra; Agus Ika Putra; Muhamad Yusa
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
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Abstract

Five major earthquakes with magnitudes of more than 8 have affected Sumatra island 250 years ago (Natawidjaja, 2007). Riau province in the middle of Sumatra island is quite prone to get the impact of earthquake. The propagation of these earthquake waves causes geotechnical problems such as liquefaction. Liquefaction research has been done but the liquefaction potential in sand embankment on peat soil has never been done. The peatland in Riau Province is 3.9 million hectares out of 8.7 million hectares of Riau. So that many buildings in the Riau Province is above the peat land bankfilled with sand. This study uses a laboratory model of shaking table with speeds of 0.25 g and 0.32 g. A 0.5x1.0 meter acrylic box is installed on a shaking table and filled with 10 cm thick peat soil, then banckfilled it with 15 cm thick of sand. The peat soil and sand embankment are saturated, then the load is evenly distributed with variations of 40 kg/m2, 80 kg/m2, and 120 kg/m2. Evaluation of liquefaction potential is based on observation of the increment of pore water pressure measured by installing two vertically bankfilled pipe with a depth of 7.5 cm. On the sides of the acrylic box is also installed two rulers to observe the soil settlement. The results of this study indicate that as the given load increased, soil settlement and increase of pore water also increased. The weight of the load is also directly proportional with soil vertical pressure and pore water pressure ratio value.Keywords: liquefaction,sand, peat soil, pore water pressure, shaking table
Studi Eksperimen Pengaruh Gelombang Dan Kecepatan Terhadap Pembentukan Tidal Flat Pantai Gambut Genta Putra Adietama; Sigit Sutikno; Muhamad Yusa
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Tidal flat forms as the results of sedimentation processes which are mainly influenced by the coastal hydrodynamic. Tidal flat formation on the coastal peat is a unique phenomenon that has  bee occurring at western part of Bengkalis Island, Riau Province, Indonesia. This study aimed to shed light some of aspect of its development. The method used in this research was laboratory test which simulate the tidal flat formation with five different wave variations. Simulations were carried out using coastal peat soil and seawater, collected from Meskom Village, Bengkalis Island, Riau Province, Indonesia. The equipment used in this simulation is a flume with a size of 500 cm x 25 cm x 7.6 cm, a wave generator, and a velocimeter. The results showed that tidal flat only formed as the result of small wave height i.e. 0.01 meters - 0.02 meters and a period between 1.43 seconds - 0.65 second, wave length of 0.149-1.25m and low current speed of 0.094-0.138m/s. Keywords: tidal flat, peat, wave, current
Rancangan Lereng Tambang Batu Bara Terbuka Dengan Metode Probabilistik Frans Rezal; Muhamad Yusa; Gunawan Wibisono
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
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Coal was a fossil fuel. The general sense was a combustible sedimentary rock, formed from the deposition of organic matter, primarily the remains of plants and were formed through the process of coalification.One of the coal deposits was in Bangko Tengah Suban Jeriji, Muara Enim Regency, South Sumatra Province. This research examines the design of the mine pit geometry by taking into account safety andeconomic factors with probabilistic methods. The geometry of mining that was used in this design include high levels of 18 meters and a width of berm 29 meters.The result of analysis show slopes for the singleslope 1:0.50 for overburden, interburden, and underburden, 1:0.75 for seam D, and 1:1.00 for seam E. The oveall slope have a depth of 200 meters with an angle of 27o for Highwall and 12o for Lowwall. The Safetyfactor obtained in this design are 2.101 with PoF 0% for Highwall and 3.575 with PoF 0% for Lowwall. There are 4 inter-ramp on this design with safety factor 1.260, 1.569, 3.495, and 3.455. All of inter-ramphave PoF 0%. The value of the stripping ratio of this design is 12.812.Keyword: Single Slope, Overall slope, FK, PoF.
Co-Authors Abdul Halim Muqorrobin Abdullah Ihsan Alkubuwi Agus Ika Putra Agus Ika Putra Ananda, Rizki Fajri Annisa Soraya Hasibuan Ari Sandhyavitri Arifan Farhan Ary Iqbal Azizah . Bagus Muhammad Akbar Daniel Irfan Dian Paramita Eka Saputra Eko Soebowo Elianora Elianora Endala Siboro Esther RA Fadli Dirga Subardi Ferry Fatnanta Fitri Herawati Frans Rezal Frimadofi Frimadofi Genta Putra Adietama Gina Khusnul Khotimah Gunawan Wibisono Gunawan Wibisono Gustika, Rani Ardeylina Himmatul Azizah Indradi Wijatmiko Jannika Suhelmi Lisa Trisnawati Lita Darmayanti Muhamad Azizi Muhammad Naufal Muhammad Riyan Sabri Muhammad Shalahuddin Muhammad Shalahuddin Muhammad Taufik Muhardi Oki Chandra Ongko, Andarsin Panji Tegar Aji Rafika Rani Zainuddin Ridho Ilahi Ronny Tigor Sitanggang Ropiska Alfareza Satibi, Syawal Simanjuntak, Lambok Jadiaman Soewignjo Agus Nugroho Sutikno, Sigit Vebrian Anggara Wahyu Frisnel Yoyon Kurniawan