Identification of Safety Factors and Soil Deformation Against Potential Landslide Hazard by Disturbed and Undisturbed Soil Boring Sampling in Kandangan Village …

DMN Sandi, CB Santoso, Z Erwanto… - … Conference on Architecture …, 2023 - Springer
International Conference on Architecture and Civil Engineering Conference:, 2023Springer
Abstract Kandangan Village, Pesanggaran District, Banyuwangi Regency, is a village at the
foot of the Betiri mountains, and the geographical conditions are hills. The area consists of
forests, plantations, residential areas and agricultural land. The condition of the Kandangan
Village area is in the hills, resulting in the village frequently experiencing landslides.
Landslides are movements of masses of soil or rock resulting from disturbances in slope
stability. Factors that trigger landslides include morphology, geological structure, land use …
Abstract
Kandangan Village, Pesanggaran District, Banyuwangi Regency, is a village at the foot of the Betiri mountains, and the geographical conditions are hills. The area consists of forests, plantations, residential areas and agricultural land. The condition of the Kandangan Village area is in the hills, resulting in the village frequently experiencing landslides. Landslides are movements of masses of soil or rock resulting from disturbances in slope stability. Factors that trigger landslides include morphology, geological structure, land use, soil type, geological structure, climatology (rainfall) and seismicity (Utomo and Widiatmaka 2013). Identification of safety factors and soil deformation for potential landslide hazards is carried out with the aim of obtaining input data for modeling landslide-prone zoning. There are three main stages in research to identify safety factors and soil deformation against potential landslide hazards. The first stage is a location survey. A location survey is carried out to record the coordinates using GPS and take soil samples at the specified location points. Soil samples were taken using the test pit and boring method. Soil samples taken were disturbed and undisturbed soil samples. The second stage is physical and mechanical testing of the soil in the laboratory. The tests carried out include sieve analysis, unit weight, specific gravity, permeability, water content and direct shear tests. The third stage is to carry out finite element analysis with Plaxis 2D software to obtain data on safety factors and soil deformation. The output results from modeling using Plaxis 2D obtained the lowest safety figure at the HB 1 location with a value of 2731 and the highest safety figure at the K point location with a value of 45,525. The results of the deformation analysis from the Phi-c Reduction analysis show that the lowest deformation value is at the HB 1 location of 1.15 m and the highest deformation value is at the HB 3 point of 108.53 × 103 m.
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