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All Journal Rekayasa Sipil Bearing : Jurnal Penelitian dan Kajian Teknik Sipil
Alfaries, M. Rifki
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Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Simulation of the Potential Liquification of Puger Sand Soil on a Small Scale in the Laboratory Alihudien, Arief; Alfaries, M. Rifki; Rizal, Nanang Saiful
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.02.10

Abstract

Puger is a nearshore area in the Jember district. On the Indonesian liquefaction zone atlas map, Puger is a high liquefaction zone.  Liquefaction can occur when water-saturated soil loses its strength and behaves like a liquid due to seismic vibrations. Thus, an in-depth understanding of soil behavior and the structures above it due to liquefaction events is needed to mitigate disasters.  This study aims to effectively simulate the liquefaction potential of Puger sand material on a small laboratory scale to identify soil behavior that can cause structural damage due to liquefaction phenomena. The method used in this experiment is that water-saturated sand samples are placed in a container and subjected to vibration using a shaker to simulate the effects of an earthquake. Parameters observed include changes in density, soil deformation, and pore pressure during and after vibration. The simulation results show that the pore pressure increases sharply at a certain depth, reducing the cohesion between sand grains and causing a decrease in soil strength. This can be seen from the increase in pore pressure, which automatically decreases the effective soil stress in the soil.
Studi Penggunaan Dynamic Cone Penetrometer untuk Mendukung Perencanaan Perkerasan Jalan di Lingkungan UM Jember Budi, Galih Alnabawi Putra Amelinda Setia; Gunasti, Amri; Alfaries, M. Rifki
Bearing : Jurnal Penelitian dan Kajian Teknik Sipil Vol 10, No 2 (2025): Bearing : Jurnal Penelitian dan Kajian Teknik Sipil
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jbearing.v10i2.10495

Abstract

This study aims to analyze the bearing capacity of the subgrade in the vicinity of Muhammadiyah University of Jember using the Dynamic Cone Penetrometer Test (DCPT) method as a basis for planning road pavement thickness. The testing was conducted at several locations by recording the cone penetration values due to falling loads (mm/impact) and converting them into California Bearing Ratio (CBR) values through an empirical approach. The test results showed that the average DCP value at point 1 was 76.58 mm/impact with a CBR of 2.19%, while at point 2 it was 79.67 mm/impact with a CBR of 2.08%. Both values indicate that the subgrade is classified as soft to very soft soil with low bearing capacity. Linear regression analysis between the DCP and CBR values produced a correlation coefficient (R) of 0.974 and a coefficient of determination (R²) of 0.948, indicating a very strong and significant relationship between the two parameters. Based on these results, it can be concluded that the DCPT method is effective for quickly and economically determining field CBR values and can serve as a reference in planning pavement thickness at the University of Muhammadiyah Jember.
Co-Authors Amri Gunasti Arief Alihudien, Arief Budi, Galih Alnabawi Putra Amelinda Setia Nanang Saiful Rizal