›› 2007, Vol. 28 ›› Issue (8): 1565-1570.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

3D elastoplastic finite element simulation on excavation and reinforcement of the diversion tunnel outlet slope at the left bank of Jinping-I Hydropower Project

CHEN Yi-feng, ZHOU Chuang-bing, YU Zhi-xiong, ZHANG Wen-jie, JIANG Qing-hui   

  1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
  • Received:2005-08-29 Online:2007-08-10 Published:2013-10-15

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Abstract: The diversion tunnel outlet slope at the left bank of the Jinping-I Hydropower Project is naturally steep, with deep fractures, compressive fracture zones between layered strata, and release fractures oriented parallel to slope surface heavily developed. After excavation of the rock mass near the slope toe that maintains the stability of the slope, negative effects will occur on the stability of the cut slope and the upper rock mass developed with deep fractures. Based on an elastoplastic constitutive model of rock mass reinforced with rock bolts and cables, numerical simulations are performed by elastoplastic FEM to evaluate the stability of the slope during slope excavation, reinforcement and under seismic loading, and to evaluate the effectiveness of a suggested construction procedure of “anchoring before excavation and anchoring immediately after excavation”. Finally, several suggestions that may be helpful to construction of the slope, are presented.

Key words: Jinping-I Hydropower Project, diversion tunnel outlet slope, excavation, reinforcement, elastoplastic FEM

CLC Number: 

  • TU 472
  • 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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