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Elastic-plastic numerical analysis of excavation process of the hydropower underground powerhouse

Jia Guo

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Abstract

The excavation process of an underground power plant was simulated by using three-dimensional elastic-plastic finite element method.The changes of the displacement and stress of the surrounding rock around the cave is analyzed.The calculation and analysis result show that the stability of the cave is poor and the rock excavation deformation is larger as the surrounding rock is much more broken,the supporting structure should be constructed in time.

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What this paper is about

The excavation process of an underground power plant was simulated by using three-dimensional elastic-plastic finite element method.The changes of the displacement and stress of the surrounding rock around the cave is analyzed.The calculation and analysis result show that the stability of the cave is poor and the rock excavation deformation is larger as the surrounding rock is much more broken,the supporting structure should be constructed in time.

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Available abstract

The excavation process of an underground power plant was simulated by using three-dimensional elastic-plastic finite element method.The changes of the displacement and stress of the surrounding rock around the cave is analyzed.The calculation and analysis result show that the stability of the cave is poor and the rock excavation deformation is larger as the surrounding rock is much more broken,the supporting structure should be constructed in time.

Key concepts: Excavation, Geotechnical engineering, Geology, Cave, Displacement (psychology), Finite element method, Deformation (meteorology), Hydropower

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