›› 2009, Vol. 30 ›› Issue (4): 1023-1028.

• Geotechnical Engineering • Previous Articles     Next Articles

Study of the stability analysis and three dimensional numerical simulation of #IV-#VI ridges in left bank at Jingping First Hydropower Station

XU Pei-hua 1,2，HUANG Run-qiu2，CHEN Jian-ping1，YAN Ming2，GONG Mang-fu3，ZHOU Jiang-ping4   

  1. 1. National Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China; 2. College of Construction Engineering, Jilin University, Jilin 130026, China; 3. Chinese Hydropower Engineering Consulting Group Co., Chengdu Institute of Investigation and Design, Chengdu 610072, China; 4. Ertan Hydropower Development Company Ltd., Chengdu 610021, China
  • Received:2007-09-11 Online:2009-04-10 Published:2011-01-30

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Abstract:

At #IV-#VI ridges in the left bank slope of Jingping First Hydropower Station, there are numbers of deep cracks and faults, such as F2, F5 and F9, which result in huge latent instable block in this area. So the stability of huge block becomes an important problem under the conditions of excavation and flood discharge. The cracks’ distribution character and the influence on slope’s stability are summarized; and the deformation model of #IV-#VI ridges under the condition of flood discharge is analyzed based on plentiful geologic investigation data. Additionally, the change of stress, especially the zone of tension stress is analyzed at the course of excavation by means of three-dimensional numerical simulation, in which the influence of excavation on slope stability is studied. It is the conclusion that there is no evidence difference to stress and whole stability of the ridges after excavation. On the other hand, the deformation of #IV-#VI ridges is analyzed and computed under the changed hydrogeological geology condition by FLAC3D. The calculation based on parameter and water table sensitivity indicates that the whole slope’s stability is more sensitive to rock mass parameters than different water table.

Key words: deep cracks, atomization by flood discharge, deformation failure mechanism, numerical simulation

CLC Number: 

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