Testing The Difference Value of Compressive Strenght for Distrub and Undistrub Soil in Sibolga Hill Landslide

Abstract One of the parts in soil parameters that can determine the shear strength of soil is the soil compressive strength value which is obtained from the Unconfined Compression Strength (UCS) test. The value of the shear strength of soil is half value of soil compressive strength. This research uses experiment method that is done in the laboratory, using distrub and undistrub soil sample models which originate from landslide in the area of Aek Parombunan, Pancuran gerobak and Angin Nauli Village of Sibolga. The results that want to be obtained in this research are seeing the differences great value of “qu” (soil compressive strength value) which represents the soil samples that are tested, so that great and little value of “qu” can determine the consistency properties of soil, and it can be used for data to evaluate the ability of soil to support the load above it, and it can be used for initial data as an early warning of potential landslide.