Paper Title:
Analysis on Causes of Deformation and Failure of Large Scale Underground Powerhouse
  Abstract

Jinoping No.1 is a dominant reservoir cascade hydropower station which locates at the downstream of Yalong river. The underground powerhouse locates at the right bank of the dam, lithology is marble that belongs to the second member of Zagunao group. It is constructed at region with very complicated geological conditions and high geo-stress. Concrete cracking, spalling and steel buckling and bending occurred at the downstream crown after supporting. This paper analysed the causes of deformation and failure through geological analysis and numerical simulation, and concluded that deformation and failure mainly occurred at the region where the quality of surrounding rock belongs to Ⅲ1 and had nothing to do with the unstable block cut by cracks; stress field of surrounding rock varied continueously with the proceeding of successive excavation of underground powerhouse, so the compressive stress and shear stress concentration occurred which caused the compression and shear failure of downstream crown and made it bending to the free face. It is significant to the further enforcement of this project and to the research on other similar underground caverns theoretically and practically.

  Info
Periodical
Chapter
Chapter 1: Frontiers of Building Engineering
Edited by
Dongye Sun, Wen-Pei Sung and Ran Chen
Pages
644-650
DOI
10.4028/www.scientific.net/AMM.71-78.644
Citation
J. Y. Dong, J. H. Yang, G. X. Yang, F. Q. Wu, "Analysis on Causes of Deformation and Failure of Large Scale Underground Powerhouse", Applied Mechanics and Materials, Vols. 71-78, pp. 644-650, 2011
Online since
July 2011
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Price
$32.00
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