Researches on the Stability of Deeply-Buried Water Diversion Tunnel Based on Strength Reduction Method

Abstract:

In view of the complexity of the deeply-buried water diversion tunnel and adopting the advantage of slope strength reduction method, this research takes advantage of strength reduction method to study the stability of diversion tunnel. Based on the instance of Jinping II hydropower, this paper analyzes Yantang Formation III surrounding rocks buried 2500m deep below the ground, adopts the Mohr-Coulomb criterion, takes the cavern displacements or relative displacement as buckling critical criterion, and finally concludes that the safety factor is 1.5 in this instance, not far from 1.2 in the norm. It is thus reasonable to use strength reduction method to study the stability of the deeply-buried water diversion tunnel. The method can get safety factor easily and objectively and can provide scientific basis for evaluating the deeply-buried water diversion tunnel and the design for the supporting structure.

• Periodical: Applied Mechanics and Materials (Volumes 303-306)
• Pages: 2876-2879
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.303-306.2876
• Online since: February 2013
• Authors: He Jun
• Keywords: Analysis of Stability, Deeply-Buried Water Diversion Tunnel, Safety Coefficient, Strength Reduction Method

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