Particle flow simulation of seepage erosion around shield tunnel

ZHANG Dong-mei; GAO Cheng-peng; YIN Zhen-yu; WANG Ru-lu; YANG Tian-liang

doi:10.16285/j.rsm.2017.S1.053

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Particle flow simulation of seepage erosion around shield tunnel

更新时间：2026-06-25

- Particle flow simulation of seepage erosion around shield tunnel
- Vol. 38, Issue S1, Pages: 429-438(2017)
- 作者机构：
  
  1. 同济大学岩土及地下工程教育部重点实验室,上海,200092
  2. 同济大学地下建筑与工程系,上海,200092
  3. 上海地铁维护保障有限公司,上海,200070
  4. 上海市地质调查研究院,上海,200072
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.S1.053
  CLC： U452
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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ZHANG Dong-mei, GAO Cheng-peng, YIN Zhen-yu, et al. Particle flow simulation of seepage erosion around shield tunnel[J]. 2017, 38(S1): 429-438.
DOI：

ZHANG Dong-mei, GAO Cheng-peng, YIN Zhen-yu, et al. Particle flow simulation of seepage erosion around shield tunnel[J]. 2017, 38(S1): 429-438. DOI： 10.16285/j.rsm.2017.S1.053.

摘要

建造在砂土环境中的盾构隧道渗漏水会将砂土颗粒带入隧道内部，导致隧道周围砂土流失，引起隧道的不均匀变形与沉降。建立了隧道–土体离散元计算模型，模拟隧道不同部位发生局部渗流侵蚀时隧道中心位移、隧道表面土压力分布及地表沉降的变化。结果表明，隧道中心位移、地表沉降量均与颗粒流失比例呈线性增加关系；受颗粒流失及流失缝周围形成的颗粒力拱影响，隧道表面土压力重分布，会使流失缝宽度进一步扩大而加剧渗流侵蚀进程，且渗流侵蚀发生于隧道底部产生的影响大于渗流侵蚀发生于隧道腰部与顶部。

Abstract

For tunnels built in silty sand

the tunnel leakage can carry the fine particles into tunnels and generate seepage erosion

which will result in the tunnel settlement and damage the tunnel serviceability. This paper presents the tunnel displacement

soil stress distribution and ground settlement due to seepage erosion by using the discrete element method(DEM) simulation. The results show that the tunnel displacement and ground settlement increase linearly with the particles loss ratio. Particle arch formed around the erosion seam will redistribute the soil pressure; and it can lead to further expansion of the erosion seam and accelerate the seepage erosion process. And the seepage erosion in the inverse of the tunnel is more risky to tunnel serviceability than that in the tunnel waist and crown.

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