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All Journal Dinamika Teknik Sipil Journal of Civil Engineering and Planning (JCEP)
Wiati, Irene Tresna
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Transportation

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Reconstruction of Natural Slope Stability by Limit Equilibrium Methods and Finite Element Methods Irwan, Andesta Granitio; Wiati, Irene Tresna
Dinamika Teknik Sipil: Majalah Ilmiah Teknik Sipil Vol. 16/No.2/Desember 2023
Publisher : Departement of Civil Engineering, Faculty of Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/dts.v16i2.23276

Abstract

Slope stability analysis is particularly important for natural slopes that are relatively undesigned to be technically safe. Natural slopes are prone to collapse depending on the condition of the slope material and rainfall. A comprehensive stability analysis using numerical methods to calculate the factor of safety and probability of collapse can be used as a reference to assess the safety of a slope. This study discusses boundary equilibrium and finite element in the analysis of slope safety factor and landslide probability by reconstructing the slope with landslide history. The reconstruction of the slope is based on the actual slope condition with saturated material due to rain that has a safety factor of 0.5 using mathematical methods which are then analyzed numerically in this study. The results of the factor of safety on the saturated condition slope have a value that is not much different from the actual condition with a 100% probability of landslide. The results of low shear strength values in each slice of the limit equilibrium analysis for saturated conditions also indicate that the slope is in an unsafe condition which is supported by the development of shear and tensile strains in the finite element method analysis in the slope slide plane area which causes the stress distribution in the actual landslide area to be unstable. 
The Quality Testing of Rangkui River Water in Pangkalarang Area, Pangkalpinang City Wiati, Irene Tresna; Erika Fitri Wardani
Journal of Civil Engineering and Planning (JCEP) Vol. 6 No. 1 (2025)
Publisher : Program Studi Sarjana Teknik Sipil Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/jcep.v6i1.9860

Abstract

The availability of clean water is very important for improving public health. Clean water sources can come from the ground, rivers, dug wells, and so on. The Pangkalarang community also really needs clean water. Currently, they only use dug well water that does not meet health requirements. The quality of clean water in this area is affected by seawater intrusion that pollutes groundwater. Pangkalarang has a surface water source in the form of Rangkui River water whose quality must be known if it is to be used as clean water. So researchers consider it necessary to conduct laboratory tests on river water samples. The parameters tested were pH (5.83) so that the pH of the water is categorized as an acidic liquid because the pH value is less than 7), COD (the highest value is 39.8 mg/L while the standard value is 10 mg/L), BOD (the highest value is 4.52 mg/L while the standard value is 2 mg/L), heavy metal content Zn (value <0.0377 mg/L and while the standard value is 0.01 mg/L), and Eschericia Coli bacteria content (the highest value is 350 MPN/100 ml while the standard value is 0 MPN/100 ml) according to PP Number 22 of 2021 concerning the Implementation of Environmental Protection and Management. Based on laboratory tests, Rangkui River water does not meet health requirements. Therefore, researchers do not recommend the river water as a source of clean water.
Co-Authors Andesta Granitio Irwan Erika Fitri Wardani