Landslides are the downward movement of materials under the influence of gravity when shear stress exceeds the shear strength of the material. It includes various movements resulting in complex type of slope failures which commonly occurred on cut slopes of Ghat roads in mountaneous region. The study area chosen for the geotechnical investigation is Kolli hills situated in the tail end of the Eastern Ghats in Namakkal district of Tamil Nadu, India. The ghat road section of 20 km stretch along with 70 hairpin bends, connects the foothills at Karavallikkombai to Sholaikkadu at the top is selected for the present study. The hill is situated at a fault zone which is extended from Mettur dam, Salem district, Tamil Nadu. In this study, undisturbed soil samples were collected from 10 landslide locations and tested for its index and engineering properties. Based on the test results, static slope stability analysis using Modified Bishop method and dynamic slope stability analysis using Simplified Newmark method were carried out to find out factor of safety of the slopes which is used to derive the slope stability assessment of the study area. The landslide hazard zone assessment was carried out to identify the landslide prone areas.

当剪切应力超过材料的剪切强度时，滑坡是材料在重力作用下的向下运动。它包括各种运动，导致复杂类型的边坡破坏，这通常发生在山区的高止山脉道路的切坡上。进行岩土工程研究的研究区域是位于印度泰米尔纳德邦Namakkal区东高止山脉尾端的Kolli山。本研究选择了20公里的高止山脉路段和70个发夹弯，将Karavallikkombai的山麓与顶部的Sholaikkadu连接起来。该山丘位于断层带，该断层带从泰米尔纳德邦塞勒姆地区的Mettur大坝延伸。在这项研究中，从10个滑坡位置采集了未扰动的土壤样品，并对其指标和工程特性进行了测试。根据测试结果，进行了修正Bishop方法的静态边坡稳定性分析和Simplified Newmark方法的动态边坡稳定性分析，以找出边坡的安全系数，从而得出研究区域的边坡稳定性评估结果。进行了滑坡危险区评估，以确定易发生滑坡的地区。