Stability of Rock Slope Using Kinematic Analysis: A Case Study at Bukit Gemilang, Sungai Besi, Kuala Lumpur

Abstract

Discontinuities are crucial for assessing the stability of rock slopes, with their geometric properties such as direction and orientation serving as key indicators. Conventionally, compasses have been used to measure the direction and orientation of these discontinuities, but this method requires considerable time for data collection. Recent advancements in remote sensing technology, particularly Terrestrial Laser Scanners (TLS), provide a more efficient alternative for measuring rock slope discontinuities. This study focuses on the stability of the rock slope at Bukit Gemilang, located in the Universiti Pertahanan Nasional Malaysia (UPNM) campus in Sungai Besi, Kuala Lumpur. Investigating this area is crucial because of the risks it poses to students and staff who pass by, particularly given the lack of prior studies reported in the literature. The paper aims to determine the orientation of the discontinuity features of the Bukit Gemilang rock slope using both conventional and TLS methods. Statistical tests indicate no significant difference between the data collected from the two methods, suggesting that TLS is a reliable tool for obtaining preliminary information on rock slope stability. This data is then utilized for kinematic analysis using Rocscience Dips software, which indicates low probabilities of planar, wedge, and toppling failures at 16.16%, 7.84%, and 4.04%, respectively. This suggests that the rock slope is considered stable. However, to enhance safety for road users on Bukit Gemilang, it is recommended to consider the installation of dowel bars and wire mesh in certain areas within the fractured rock zone.