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Yuki Achmad Yakin
Institut Teknologi Nasional
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Environmental Science

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Analisis Stabilitas Lereng dengan Perkuatan Soil nailing dikombinasikan dengan Macmat HS dan Shotcrete menggunakan Metode Numerik Plaxis 2D Yuki Achmad Yakin; Desti Santi Pratiwi; Favian Alif Nur Javier
Jurnal Serambi Engineering Vol 7, No 2 (2022): April 2022
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v7i2.4066

Abstract

Lereng adalah suatu bidang pada permukaan bumi yang terbentuk karena kemiringan sudut tertentu terhadap bidang horizontal. Lereng dapat diklasifikasikan menjadi lereng alami dan lereng buatan. Stabilitas lereng memiliki peran penting dalam upaya keselamatan manusia dan kekuatan bangunan yang akan dibangun di sekitar wilayah lereng. Soil nailing merupakan suatu bentuk perkuatan dalam upaya untuk meningkatkan stabilitas lereng guna menghindari potensi longsor. Soil nailing pada umumnya dikombinasikan dengan surface protection untuk mencegah erosi dan melindungi lereng yang sudah diperkuat agar tidak terjadi keruntuhan. Penelitian ini bertujuan untuk mengkaji pengaruh kemiringan pada lereng yang diperkuat setinggi 5meter dari 20 meter kemiringan total terhadap stabilitas lereng menggunakan PLAXIS 2D. Hasil analisis menunjukan alternatif kemiringan lereng 1V:1H sudah memenuhi kondisi aman sehingga tidak perlu dilakukan perkuatan sedangkan lereng dengan alternatif kemiringan 2V:1H, 3V:1H dan 4V:1H diperlukan perkuatan soil nailing untuk meningkatkan nilai faktor keamanan sehingga memenuhi kondisi aman. Penggunaan Macmat HS dan Shotcrete tidak berdampak besar terhadap nilai faktor keamanan. Penggunaan Shotcrete menaikkan nilai faktor keamanan lebih besar dibandingkan Macmat HS karena perbedaan tingkat kekakuan dari kedua material tersebut.
Analisis Pengaruh Lapisan Saprolite pada Timbunan di Atas Tanah Lunak Menggunakan Metode Numerik (PLAXIS 2D) Yuki Achmad Yakin; Desti Santi Pratiwi; Arinal Ghalibaldi Gazali
Jurnal Serambi Engineering Vol 7, No 3 (2022): Juli 2022
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v7i3.4681

Abstract

Embankment within soil causes changes in tension within it, which causes deformation to occur and results in stabilization in the soil. The type of soil, method of filling, and degree of density can affect the soil’s technical properties. When embankment work forming a new slope, it is important to analyze the slope’s stability. This study analyzes the effect of elevation, slope, saprolite layer thickness, and depth of replacements using PLAXIS 2D software. The results of the analysis show there are effects from elevation, namely the higher the embankment the greater the decrease and the smaller the safety factor becomes. The slope also has effects and influence, that is the steeper the embankment, the smaller the decrease and the greater the safety factor. Furthermore, there are effects from the replacement’s depth. Namely the thicker the replacement depth results in the decrease in the Short-Term condition becoming larger and the decrease in the Long-Term condition getting smaller.
Evaluasi Tanah Pasir Lepas Terhadap Potensi Likuefaksi di Area Bandara Kulon Progo Berdasarkan Peta Gempa Indonesia tahun 2017 Yuki Achmad Yakin; Desti Santi Pratiwi; Virhan Maulana Fachrezy
Jurnal Serambi Engineering Vol 8, No 2 (2023): April 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i2.6008

Abstract

Java Island is traversed by the Pacific Ring of Fire, making Java Island an earthquake-prone area. One of the problems caused by earthquake is the danger of liquefaction. Kulon Progo is in a zone of high liquefaction vulnerability. Liquefaction is the loss of soil shear strength due to changes in soil properties from solid to liquid caused by cyclic loads that occur so that the pore water pressure increases beyond the vertical stress and causes the effective stress to be zero. Liquefaction mostly occurred in sand loose and saturated condition. Peak Ground Acceleration values (PGA) and earthquake magnitude are sourced from Peta Gempa Indonesia 2017 and use soil data from the Standard Penetration Test (SPT) test results. In evaluating the potential for liquefaction at the study site, the analysis method Youd Idriss, Idriss Boulanger, and Tokimatsu Yoshimi was used. The results of the comparison between soil resistance or Cyclic Resistance Ratio (CRR) with cyclic loads that occur or Cyclic Stress Ratio (CSR) show the same results. In part 1 it can be seen that the average depth of liquefied soil starts from a depth of 1.7 – 4 meters or as deep as 2.3 m, while in part 2 it can be seen that the average depth of liquefied soil starts from a depth of 3.3 – 4 meters or as deep as 0.7m.
Pengaruh Magnitude Moment Terhadap Potensi Likuefaksi Tanah Loose Sand Jenuh Air Menggunakan Model UBC3D-PLM Yuki Achmad Yakin; Desti Santi Pratiwi; Farhan Tri Jaelani
Jurnal Serambi Engineering Vol 8, No 2 (2023): April 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i2.6009

Abstract

Liquefaction is a decrease in the shear strength of the soil caused by an increase in pore water pressure until it is equal to the strength value of the soil. The Plaxis 2D application with the UBC3D-PLM model is used in this study to analyze the effect of the magnitude moment on soils with liquefaction potential, the effect of the magnitude moment on the increase in pore water pressure ratio, the effect of different soil densities, and the effect of the depth of loose soil on the potential for liquefaction. The effect of moment magnitude on liquefaction potential is obtained from the results of data modeling analysis. The analysis results show that the potential for liquefaction increases with the magnitude of the moment. On the other hand, the liquefaction probability is lower when the moment magnitude is smaller. This study shows that an earthquake with a magnitude of 6.95 (Mw) occurs in loose and medium-dense soils. Meanwhile, an earthquake with a moment magnitude of 5.5 (Mw) only occurs on soils with loose density. Meanwhile, the earthquake with a moment magnitude of 4.27 (Mw) did not experience liquefaction at any soil density.
Evaluasi Tanah Pasir Lepas Terhadap Potensi Likuefaksi di Area Bandara Kulon Progo Berdasarkan Peta Gempa Indonesia tahun 2017 Yuki Achmad Yakin; Desti Santi Pratiwi; Virhan Maulana Fachrezy
Jurnal Serambi Engineering Vol 8, No 2 (2023): April 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i2.6008

Abstract

Java Island is traversed by the Pacific Ring of Fire, making Java Island an earthquake-prone area. One of the problems caused by earthquake is the danger of liquefaction. Kulon Progo is in a zone of high liquefaction vulnerability. Liquefaction is the loss of soil shear strength due to changes in soil properties from solid to liquid caused by cyclic loads that occur so that the pore water pressure increases beyond the vertical stress and causes the effective stress to be zero. Liquefaction mostly occurred in sand loose and saturated condition. Peak Ground Acceleration values (PGA) and earthquake magnitude are sourced from Peta Gempa Indonesia 2017 and use soil data from the Standard Penetration Test (SPT) test results. In evaluating the potential for liquefaction at the study site, the analysis method Youd Idriss, Idriss Boulanger, and Tokimatsu Yoshimi was used. The results of the comparison between soil resistance or Cyclic Resistance Ratio (CRR) with cyclic loads that occur or Cyclic Stress Ratio (CSR) show the same results. In part 1 it can be seen that the average depth of liquefied soil starts from a depth of 1.7 – 4 meters or as deep as 2.3 m, while in part 2 it can be seen that the average depth of liquefied soil starts from a depth of 3.3 – 4 meters or as deep as 0.7m.
Pengaruh Magnitude Moment Terhadap Potensi Likuefaksi Tanah Loose Sand Jenuh Air Menggunakan Model UBC3D-PLM Yuki Achmad Yakin; Desti Santi Pratiwi; Farhan Tri Jaelani
Jurnal Serambi Engineering Vol 8, No 2 (2023): April 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i2.6009

Abstract

Liquefaction is a decrease in the shear strength of the soil caused by an increase in pore water pressure until it is equal to the strength value of the soil. The Plaxis 2D application with the UBC3D-PLM model is used in this study to analyze the effect of the magnitude moment on soils with liquefaction potential, the effect of the magnitude moment on the increase in pore water pressure ratio, the effect of different soil densities, and the effect of the depth of loose soil on the potential for liquefaction. The effect of moment magnitude on liquefaction potential is obtained from the results of data modeling analysis. The analysis results show that the potential for liquefaction increases with the magnitude of the moment. On the other hand, the liquefaction probability is lower when the moment magnitude is smaller. This study shows that an earthquake with a magnitude of 6.95 (Mw) occurs in loose and medium-dense soils. Meanwhile, an earthquake with a moment magnitude of 5.5 (Mw) only occurs on soils with loose density. Meanwhile, the earthquake with a moment magnitude of 4.27 (Mw) did not experience liquefaction at any soil density.
Co-Authors Arinal Ghalibaldi Gazali Desti Santi Pratiwi Desti Santi Pratiwi Farhan Tri Jaelani Favian Alif Nur Javier Virhan Maulana Fachrezy