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

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摘要为模拟注浆治理横向大变形效果及机理分析,提出离散元孔隙密度流法,通过改进研发离散元软件MatDEM,实现隧道注浆流固耦合过程数值模拟。基于上海隧道工程实例数据,开展突发堆载下隧道注浆的离散元分析,数值模拟的隧道横向收敛值和现场实测结果十分接近。进一步数值分析表明:随着突发荷载的增大,隧道水平收敛值呈现出非线性增长趋势;采用孔隙密度流法分析注浆对隧道横向变形的恢复效果,结果表明随着突发堆载和注浆距离的增大,注浆对隧道水平收敛恢复比例的影响非线性减小。此方法可进一步应用于复杂条件下隧道注浆的数值分析和机理研究。

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	张鸿勇
	张艳杰
	刘春
	施斌
	曹政

关键词: 离散元数值模拟收敛变形隧道注浆 MatDEM

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

收稿日期: 2021-05-08 修回日期: 2021-06-23 发布日期: 2021-09-20

中图分类号:

TU47

基金资助: 国家自然科学基金项目（41761134089，41977218）；中央高校基本科研业务费（14380103）

通讯作者: 刘春(1984— ),男,福建顺昌人,博士,副教授,硕士生导师,主要研究方向为计算工程地质. E-mail: chunliu@nju.edu.cn

作者简介: 张鸿勇(1998— ),男,湖南衡阳人,硕士研究生,主要研究方向为流固耦合数值模拟.E-mail: MF20290037@smail.nju.edu.cn.

引用本文:

张鸿勇, 张艳杰, 刘春, 施斌, 曹政. 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[J]. 隧道与地下工程灾害防治, 2021, 3(3): 100-110.
ZHANG Hongyong, ZHANG Yanjie, LIU Chun, SHI Bin, CAO Zheng. Analysis of grouting treatment for convergence deformation of metro tunnel based on discrete element pore density flow method. Hazard Control in Tunnelling and Underground Engineering, 2021, 3(3): 100-110.

链接本文:

http://tunnel.sdujournals.com/CN/Y2021/V3/I3/100

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