›› 2011, Vol. 32 ›› Issue (S1): 583-0589.

• Geotechnical Engineering • Previous Articles     Next Articles

In-situ stress field evolution of deep fracture rock mass at dam area of Baihetan hydropower station

HAN Gang1, 2, ZHAO Qi-hua1, 2, PENG She-qin1, 2   

  1. 1. College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China; 2. State Key Laboratory of Geo-Hazard Prevention and Geo-Environment Protection, Chengdu University of Technology, Chengdu 610059, China
  • Received:2010-07-12 Online:2011-05-15 Published:2011-05-16

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Abstract: The in-situ stress field evolution process, formation cause, formation time and evolution trend of deep fracture is analysed. Combined with deep fractures characteristic，tectonic evolution, valley evolution and near surface action theory, the formation and evolution process are summarized by stress field change and strain energy release with numerical simulation. The results show that: deep fractures in-situ stress field is fundamentally changed after vertical unloading; but deep fractures are not formed in this in-situ stress environment; the primary reason of deep fractures formation is lateral unloading and residual tensile stress caused by difference resilience; the formation time of deep fractures is about after Ⅲ terraces appearance

Key words: deep fractures, in-situ stress field evolution, strain energy, near surface action

CLC Number: 

  • TU 452
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