›› 2007, Vol. 28 ›› Issue (4): 836-842.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Back analysis and multiple-factor influencing mechanism of high geostress field for river valley region of Laxiwa Hydropower Engineering

YUAN Feng-bo1, LIU Jian1, LI Pu-jian2, QIAO Li-ping1，LI Peng1   

  1. 1. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Northwest Investigation Design and Research Institute, China Hydropower Engineering Consulting Group Corporation, Xi’an 710065, China
  • Received:2006-07-18 Online:2007-04-10 Published:2013-09-05

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Abstract: The Laxiwa Hydropower Engineering is located at high mountains and valley regions, existing high geostress in the rock masses due to the multiple-factor influences such as tectonic stress, gravity, river and weathering erosion, etc. In the river valley region, discal phenomena of drilling cores and laminated exfoliation of surrounding rock in the exploration tunnels are obvious. The determination of the 3-D geostress field in the valley region is difficult and complicated, which are tightly related to the tectonic movements in different geological period and the evolution history of river valley. In this study, detailed back analysis of the 3-D ground stress field for the engineering region is finished. Based on the results derived from the back analysis, the spatial distributing characteristics and magnitudes of the 3-D geostress field are studied. Furthermore, focused on the formation mechanisms of the geostress field, the multiple-factor influencing effects are analyzed. The paper provides a valuable reference and engineering case for the study of high geostress field and the establishments of hydropower projects located at Western China, especially for those with strong geological actions.

Key words: Laxiwa Hydropower Engineering, river valley, high geostress field, back analysis, formation mechanism.

CLC Number: 

  • TU 452
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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