Abstract

• The research aims to mention the landslide hazard and mitigation measures in the Zwekabin Range. This study road is located at the eastern part of the Zwekabin Range near Khalauknos Village, Hpa-an Township, Kayin State. This area is mainly composed of cherty limestone and lime-mudstone of Moulmein Limestone (Permian in age). Moreover, the area lies in the Zwekabin-Belin Fault Zone, a right-lateral strike-slip fault. Hilly terrain with steep slopes is found in the most of places at the study route and structurally unstable. The big landslide occurred on 15th, July in 2018 on the road at Zwekabin Range. Rock mass characterization and slope stability analysis are carried out for potential of landslides in the research area to know causes of landslides and preventing systems. In the study, although the behaviors of the rocks are not quite different along the road, the strength and engineering properties of the rocks are varied from place to place. Plane failures and wedge failures commonly occur. Most of the slopes are dangerous attaining stability because some rocks are very weak in geological condition as well as slope condition. According to the slope mass rating (SMR) analysis, most of the slopes are completely unstable and unstable slope conditions. In addition, all slopes have not been supported by suitable retaining structure and systematic drained system. Therefore, preventing systems and controlling techniques should be made to mitigate the causes of landslide.