Stability Analysis of Tunnel Rock Mass under Curtain Grouting Construction

 

Zeng Yi1,2, Zhang Junwei1,2, Li Jinping3, Quan Xiaojuan4

1. School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu, 610500, China
2. Key Laboratory of Structure Engineering of Universities in Sichuan
3. CCCC First Highway Consultants Co., Ltd, Xi’an 710075, China
4. School of Civil Engineering, Southwest Jiaotong University, Chengdu, 60031, China

 

 ABSTRACT

There will appear the following accident events, for example, drift sand, tunnel collapse and even the inrushing water caused by the underground water, when tunnel construction through these fault-fracture zones. To ensure tunnel running through the fault-fracture zones safely, some measures had been taken, including the advanced curtain grouting, full face excavation tunneling method, partial excavation method, and the surrounding rock reinforced by advance small tube. In this paper, the finite element method is used to analyze the displacement field of the surrounding rock, the stress field of the surrounding rock and the distribution characteristic of plastic zone. Finally, it is estimated the stability of tunnel in different position.

Keywords: Tunnel; Curtain grouting; Stability; Advance reinforcement; Finite element method.

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