›› 2010, Vol. 31 ›› Issue (2): 593-598.

• Geotechnical Engineering • Previous Articles     Next Articles

Study of deformation response of a high rock slope excavation at an intake for a large hydropower station

ZHU Ji-liang 1, 2, 3, HUANG Run-qiu1, ZHANG Shi-yuan2, XU De-min1   

  1. 1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China; 2. Guangxi Electric Power Industry Investigation Design and Research Institute, Nanning 530023, China; 3. Center for Hydrogeology and Environment Geology, CGS, Baoding 071051, China
  • Received:2008-07-29 Online:2010-02-10 Published:2010-03-24

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Abstract:

Through the abundant geological investigation of construction tracing in situ, the intake slope with vertical height of 106 m at a large hydropower station in Southwest China. the deformation of the high rock slope with great gradient is studied under the conditions of complex geology and high in-situ stress. Through systematical study, the basic laws and special characteristics of its deformation responses are acquired and classified as follows: ①During the slope excavation, it is found that there is strong synchronism between the slope deformation and its excavation process. ②The slope deformation is mainly influenced by excavation. ③The slope deformation generally is weakening with the distance between the excavation plane and the monitoring position, whose responding features of ultimate stability have three stages; that is, rapid increase stage of deformation, slow enhancing stage and the stable stage. ④The high slope deformation can be classified into 3 types, the shallow surface relaxation, the harmonized gradual change and rebound fluctuation. The main one is the shallow surface relaxation.

Key words: hydropower station, intake, high slope, excavation, deformation response

CLC Number: 

  • TU 457
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