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Three Dimensional Numerical Simulation Analysis on Underground Powerhouse Complex Construction

Zhenwei Qian

Abstract

Considering topographical and geologic conditions in an underground powerhouse complex in the West China,3-D nonlinear finite element method is used to simulate overall process of stage excavation in caverns,reveal stress field,displacement field and failure area distribution of surrounding rock and structures,detect destabilization locations and modes,discover surrounding rock displacement and stability during stage excavation of main caverns,including machine hall cavern,penstock tunnel,tailrace surge chamber and tailrace tunnel.These analysis results provide references for design and construction of similar projects.

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Available abstract

Key concepts: Excavation, Penstock, Geology, Geotechnical engineering, Displacement (psychology), Stress field, Stage (stratigraphy), Finite element method