Effects of water content to slope stability in Pangkalan Lima Puluh Kota

Abstract

The objective of the study was to investigate the relationship between soil water content and steepness stability in the three locations of Pangkalan District of Lima Puluh Kota. The sample data in the form of soil is tested to obtain a plastic and liquid Boundary so that it can be investigated soil strength and its relation to the water content. The test is done by determining the sample strength parameters in the initial conditions, then the water content of the sample is modified according to the plastic and liquid boundaries, as well as the unit volume. The figures for slope stability analysis were analyzed using laboratory and cross-sectional results. Test results show that the water content is the most important factor affecting the stability of the slope. Slope stability becomes critical when the water content is close to its liquid limit. However, the water content less than the plastic limit also results in a less strong soil parameter for the sample being remolded. To reduce slope failure, it is recommended to establish water control facilities in the area.