Abstract

• The Myitkyina-Kanpetii car road connects mainly Myitkyina-Waingmaw-Sadon-Kanpetii to China. It is about 80miles (96km) long that runs in east-west direction. Myanmar-China Border Gate is linked by this road consequently it transports goods for Kachin State so the economy of local people depends on it. During the rainy season, landslides often occurred along this road so local people encounter transportation and economic difficulties. This road is constructed on granitic batholiths thus two-third of the area is covered with granitic rocks. Based on field data, petrographic result and previous paper records, weathered granitic rocks are classified into two profile types: Type-A (without core-stones) and Type-B (with core-stones). Both types induce rockfalls and rock slope failures especially wedge failure and circular failure. We can deduce two potential landslides places for the study area. The first one is between the Bum Taung (N 25º 22' 54.8'' and E 97º 44' 7.7'') and Sadon village (N 25º 23' and E 97º 53' 12.1''). Another is between the Laphi village (N 25º 25' 30'' and E 97º 59' 20'') to Wai Mo village (N 25º 24' 30'' and E 98º 03'). The main facts to induce landslides are a period of high rainfall, increase pore water pressure and reduce soil cohesion, steep slope nature, road construction across the slope, deforestation, lack proper drainage system, and need effective retaining wall.