Soil Engineering and Foundation

›› 2013, Vol. 27 ›› Issue (3): 16-19.

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Rainfall Infiltration on the Stability of the No.2 Landslide at Sichuan Tibet Highway

XU Guotao1,WANG Peiqing1,2,HE Qiang1, LU Wenbin1   

  1. (1.Department of Water Conservancy and Civil Engineering, Tibet Agricultural and Animal Husbandry College, Linzhi  Xizang 860000;2.Institute of Geotechnical Engineering, Hohai University, Nanjing 210098)
  • Received:2013-03-15 Online:2013-06-20 Published:2013-06-26

Abstract: The 102 Landslide Group is located in Yigong Town, Bomi County of Linzhi, Tibet. They are on the right bank of Purlung Tsangpo River, which is the first tributary of Brahmaputra River. This landslide group is near the 102 Service Station of SichuanTibet Highway, and is about 60 km to the east of Bomi and 100 km to the west of Linzhi. The No.2 Landslide has the largest scale among this landslide group. The laboratory testing, such as, grain size distribution, Proctor test, permeability and direct shear tests are performed on samples from the landslide zone. Both the tests results and the FLAC3D numerical simulations show that the failed body is composed of glacial moraine and alluvial deposits. The rainfall is one of the main factors triggering the landslide.

Key words: 102 Landslide Group, Soil Mechanical Tests, Rainfall Infiltration, Safety Factor, Stability Analyses