基于离散元孔隙密度流法的地铁隧道收敛变形注浆整治分析

doi:10.19952/j.cnki.2096-5052.2021.03.11

Hazard Control in Tunnelling and Underground Engineering

2021, Vol. 3

Issue (3): 100-110 DOI: 10.19952/j.cnki.2096-5052.2021.03.11

Research Article

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Analysis of grouting treatment for convergence deformation of metro tunnel based on discrete element pore density flow method

ZHANG Hongyong¹, ZHANG Yanjie², LIU Chun^1*, SHI Bin¹, CAO Zheng²

1. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, Jiangsu, China;
2. School of Engineering, China University of Geosciences(Wuhan), Wuhan 430000, Hubei, China

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Abstract To simulate the effect of grouting to control large lateral deformation and its mechanism analysis, the discrete element pore density flow method was proposed. Through the improvement of the discrete element software MatDEM, the numerical simulation of the fluid-solid coupling process of tunnel grouting was realized. Based on the instance data of the Shanghai Tunnel Project, the discrete element analysis of tunnel grouting under sudden load was carried out. The numerical simulation of the tunnel lateral convergence value was very close to the test result. Numerical analysis showed that as the sudden load increased, the horizontal convergence of the tunnel showed a nonlinear growth trend; the pore density flow method was used to analyze the recovery effect of grouting on the transverse deformation of the tunnel. The results showed that with the sudden load and grouting as the distance increased, the influence of grouting on the recovery percentage of the tunnel lateral convergence decreased nonlinearly. This method can be further applied to the numerical analysis and mechanism research of tunnel grouting under complex conditions.

Key words： discrete element numerical simulation convergence deformation tunnel grouting MatDEM

Received: 08 May 2021 Published: 20 September 2021

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	ZHANG Hongyong
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Cite this article:

ZHANG Hongyong,ZHANG Yanjie,LIU Chun, et al. Analysis of grouting treatment for convergence deformation of metro tunnel based on discrete element pore density flow method[J]. Hazard Control in Tunnelling and Underground Engineering, 2021, 3(3): 100-110.

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http://tunnel.sdujournals.com/EN/10.19952/j.cnki.2096-5052.2021.03.11 OR http://tunnel.sdujournals.com/EN/Y2021/V3/I3/100

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