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All Journal Potensi : Jurnal Sipil Politeknik
Dewi Amalia
Department of Civil Engineering, Politeknik Negeri Bandung, Bandung 40559, Indonesia
Civil Engineering, Building, Construction & Architecture Engineering Transportation

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The Effect of Polyacrylamide Polymer Stabilization Soil on the Magnitude of Settlement and Stability of Bridge Approach Slabs Mulyadi Yuswandono; Dewi Amalia; Rahmat Permana; Hendry; Muhammad Bayu Arofah; Raihan Maulana Sulaiman; Suliman Badawi Ahmed
Potensi: Jurnal Sipil Politeknik Vol. 26 No. 1 (2024): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v26i1.5840

Abstract

The main problems that often occur in embankments built on soft soil are subsidence of the subgrade and stability of the embankment. This research aims to determine the effect of applying silty clay soil stabilized by PAM on subgrade subsidence and embankment operation stability. Apart from that, this research also analyzes the effect of variations in slope on subgrade subsidence and embankment stability. Analysis uses the finite element method with Plaxis 2D V20 software. From the analysis results it is known that the use of 0.2% PAM stabilized silty clay backfill material; 0.4%; 0.6%; 0.8%; and 1% has a higher Safety Factor (SF) value than the selected embankment, where the SF increase is 28.72%; 29.90%; 30.81%; 32.75%; and 33.10%, respectively. The use of silty clay material stabilized by PAM (0.2%; 0.4%; 0.6%; 0.8%; and 1%) succeeded in reducing settlement occurring in the field respectively by 10.23%; 6.77%; 5.79%; 4.41%; and 1.09%. This means saving on the need for stockpiled materials. Variations in slope affect the decrease in the stability of the subgrade and embankments, where the smaller the slope angle, the smaller the subsidence of the subgrade and the greater the value of the embankment stability safety figure obtained.
Influence of Scouring Phenomenon on Slope Stability in Substructure Construction of Cipeles Bridge Riskia Jordy; Dewi Amalia; Agastyasa Ghea Amarta
Potensi: Jurnal Sipil Politeknik Vol. 26 No. 1 (2024): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v26i1.5848

Abstract

Slope stability represents a crucial aspect of terrain integrity, safeguarding against potential landslides and ensuring structural resilience. Instabilities arise primarily from diminished safety margins and landslide occurrences triggered by alterations in slope dimensions or geometry induced by river water scouring. Such scouring processes engender heightened slope steepness, exacerbating vulnerability to failure. Utilizing Finite Element Method (FEM) software, specifically Plaxis 2D Version 22, back calculation analysis, or reverse analysis, offers a robust approach to assess safety factors and collapse patterns resulting from scour-induced alterations. Our investigation reveals a pronounced expansion of slope failure zones attributable to scour phenomena, encompassing both primary and secondary scour instances. Concurrently, there is a discernible reduction in Safety Factor (SF) values and y-displacement magnitudes along the slope, with the most notable declines observed under condition 3 (displacement-y value reaches 79,53 mm). These alterations stem from geometric transformations within the slope, culminating in increased steepness and corresponding destabilization.
Co-Authors Agastyasa Ghea Amarta Hendry Muhammad Bayu Arofah Mulyadi Yuswandono Rahmat Permana Raihan Maulana Sulaiman Riskia Jordy Suliman Badawi Ahmed