›› 2011, Vol. 32 ›› Issue (S1): 495-0500.

• Geotechnical Engineering • Previous Articles     Next Articles

Stability analysis of rock slope considering weak-layers replacement

XU Nu-wen1, 2, TANG Chun-an1, 2, TANG Shi-bin2, ZHANG Yong-bin2, SHA Chun3   

  1. . Institute of Rock Instability and Seismicity Research, Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China; 2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China; 3. HydroChina Chengdu Engineering Corporation, Chengdu 610072, China
  • Received:2010-12-02 Online:2011-05-15 Published:2011-05-16

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Abstract: The geological structures at left bank slope of Jinping First Stage Hydropower Station are very complicated. Many deep cracks and faults, such as f2, f5 and lamprophyres X, are the most significant factors that influence the stability of the rock slope. Based on the strength reduction method (SRM), realistic failure process analysis(RFPA) is used in the full failure processes evaluation of rock slope after excavation and its corresponding weak-layers replacement. From comparison results of numerical simulation, it can be observed that the safety factor increases by 0.430 after weak-layers replacement in deep rock mass, which illustrates the structural safety can be greatly improved if weak-layers replacement is conducted before excavation and support of rock slope. Furthermore, by using RFPA-SRM, not only the failure mechanisms and fracturing patterns, but also the safety factors can be obtained. The results can in turn be used for stability assessment and construction process determination of rock slope before construction.

Key words: Jinping First Stage Hydropower Station, rock slope, weak-layers replacement, stability, RFPA

CLC Number: 

  • TD 31
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