JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2014, Vol. 31 ›› Issue (6): 89-94.DOI: 10.3969/j.issn.1001-5485.2014.06.0182014, 31(06):89-94

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Stability Analysis for the Inlet Slope of Diversion Tunnel ofJinchuan Hydropower Project

ZHOU Shi1, HUANG Yi-sheng1, ZHU Min2, YANG Yue-shu3, LIANG Yu-hang4   

  1. 1.College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang443002, China;
    2.Foziling Pumped Storage Co., Ltd., Liu’an 230088, China;
    3.College of CivilEngineering & Architecture, China Three Gorges University, Yichang 443002, China;
    4.Sichuan Branch of China Datang Corporation, Guangyuan 628000, China
  • Received:2013-04-15 Revised:2014-06-06 Published:2014-06-01 Online:2014-06-06

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Abstract: The geological condition of slope at the inlet of Jinchuan Hydropower Project’s diversion tunnel is complex with several groups of developed faults and fissures, which gave rise to high and steep slope after excavation and brought about stability problem. In the present paper, sensitivity computations on pre-stressed anchor cable, lock anchor cable and anchor pile were carried out by using finite element software ADINA, and optimized measures of anchor reinforcement were presented. In subsequence, finite difference software FLAC3D was employed to build a three-dimensional model of excavated and anchored slope. The safety and stability of slope under natural condition, excavating condition, reinforcing condition and other three conditions are calculated. The calculation results demonstrated the rationality of the anchoring scheme, and revealed the unstable position under different conditions. This research has guiding significance for engineering construction.

Key words: inlet slope of diversion tunnel, excavation, anchoring, finite element, finite difference

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