›› 2017, Vol. 38 ›› Issue (S1): 429-438.doi: 10.16285/j.rsm.2017.S1.053

• 数值分析 • 上一篇    下一篇

隧道渗流侵蚀的颗粒流模拟

张冬梅1,2,高程鹏2,尹振宇1,2,王如路3,杨天亮4   

  1. 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
  • 收稿日期:2017-02-11 出版日期:2017-06-22 发布日期:2018-06-05
  • 作者简介:张冬梅,女,1975年生,博士,教授,博士生导师,从事盾构隧道结构安全评价与控制、盾构隧道施工与环境相互影响。
  • 基金资助:

    国家自然科学基金(No. 51478344,No. 5127837);国土资源部地面沉降监测与防治重点实验室开放基金(No. KLLSMP201501)。

Particle flow simulation of seepage erosion around shield tunnel

ZHANG Dong-mei1,2, GAO Cheng-peng2, YIN Zhen-yu1,2, WANG Ru-lu3, YANG Tian-liang4   

  1. 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. Maintenance Management of Shanghai Metro Co., Ltd., Shanghai 20070, China; 4. Shanghai Institute of Geological Survey, Shanghai 200072, China
  • Received:2017-02-11 Online:2017-06-22 Published:2018-06-05
  • Supported by:

    This work was supported by the National Science Foundation of China (51478344, 5127837) and Key Laboratory of land subsidence monitoring and prevention, Ministry of Land and Resources of the People’s Republic of China (KLLSMP201501).

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。

关键词: 颗粒流;隧道&ndash, 砂土结构模型;渗流侵蚀;数值模拟

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.

Key words: particle flow, tunnel-soil calculation model, seepage erosion, numerical simulation

中图分类号: 

  • U 452

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