STUDY ON THE EFFECT OF STRIKE OF MATERIAL LAYER ALMOST PARALLEL TO THE SLOPE FACE ON THE STABILITY OF LOW-WALL SLOPE

• Main Author: Ikhsan Pradana, M.
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/85205
• Institution: Institut Teknologi Bandung

Slope analysis is conducted to ensure the slope is safe. In general, slope stability analysis is done in 2 dimensions, but if the conditions in the field show that the slope is not symmetrical from one side to the other, the slope stability analysis in 2 dimensions is considered less representative. In this study, several modelling for slope stability analysis using the limit equilibrium method and finite element method in 3 dimensions (3D) were carried out related to the low-wall slope owned by PT XYZ with different strike angles of the slope forming material to the slope face strike of ???? (0°, 5°, 10°, 15°, 20° and 30°). Modelling for the LEM analysis was conducted using slide3, giving results in the form of a plan view of the size and location of the landslide as well as results in the form of values of the factor of safety (FK), landslide height, and landslide volume. While modelling for FEM was carried out using RS3 providing results in the form of a plan view of deformation on the slope seen from above and three cross-sections, as well as displacement values measured from 8 predetermined monitoring points. Based on the analysis results obtained, there is an influence of the ???? angle on the value of the low-wall slope safety factor where the FK value will tend to decrease until the most critical ???? angle and then will increase again. Then, the ???? angle also affects the deformation value of the low-wall slope where the deformation value of the slope will be more critical on one side of the slope than the other side of the slope. A stabilisation method is proposed that can be used for the slope case, which is to leave the slope material in front of the intersection of the material layer with the crest of the slope at each level, which is proven to increase the factor of safety.