SLOPE STABILITY ANALYSIS OF KM 44-52 TAWAELI-TOBOLI ROADWAY, DONGGALA REGENCY, CENTRAL SULAWESI PROVINCE, USED KINEMATIC METHOD AND ROCK MASS CLASSIFICATION

• Main Author: RAMSES (NIM : 12012076), MUCHAMAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29057
• Institution: Institut Teknologi Bandung

<p align="justify">The research area is located on the national road of KM 44-52 Tawaeli-Toboli, Donggala Regency, Central Sulawesi Province. Geographically, it is located at 119° 59' 50.2"E and 00° 43' 21.5"S to 120° 00' 25.2"E and 00° 43' 36.8"S. Geologically, the research area included in the Metamorphic Rocks Complex of Sulawesi. Based on petrographic analysis, the lithology in the research area are actinolite schist and biotite gneiss. <br /> <br /> Slope stability analysis used in the research are Kinematic Method, rock mass classification of Rock Mass Rating (RMR) and Slope Mass Rating (SMR). The slope of the research object divided into eleven points, i.e., SC-181, SC-182, SC-185(A), SC-185(B), SC-188, SC-191, SC-220, SC-226, SC-231, SC-248 and SC-249. Kinematic method is a method to determine the type of slope failures. Based on this method, it is found that the type of planar failure occurs only at SC-182, the type of wedge failure occurs at SC-181, SC-182, SC-185(A), SC-185(B), SC-220, SC-248 and SC-249, and the type of toppling failure is found at SC-181, SC-182, SC-185(B), SC-226, SC-231 and SC-248. RMR calculations show that all of the segments get the RMR value range from 63.6 to 75.0. It is concluded that the whole rock mass included in class II (good rock). Meanwhile, the cohesion and the angle of internal friction in the rock mass are 0.3-0.4 MPa and 35°-45° with safe cut slope 65°. Based on the obtained SMR value, the research area divided into three classes: (1) Class II (good), i.e., SC-181, SC-226, SC-231 and SC-248 (category IIa), and SC-185(B), SC-188, SC-191 and SC-249 (category IIb) with the slope is in stable condition; (2) Class III (normal), i.e., SC-185(A) and SC-220 (category IIIb) with the slope is in partially stable condition; and (3) Class IV (bad), i.e., SC-182 (category IVb) with the slope is in unstable condition.<p align="justify">