砂土隧道施工对下卧管线影响的试验和数值模拟分析

王正兴; 缪林昌; 王冉冉; 王非; 王小龙

doi:10.11779/CJGE201401019

砂土隧道施工对下卧管线影响的试验和数值模拟分析 English Version

1. 东南大学,江苏南京 210096; 2. 江苏省电力设计院,江苏南京 210014

基金项目: 国家自然科学基金项目（51278099）

详细信息

作者简介:
王正兴(1981- )，男，江苏海门人，博士研究生，工程师，主要从事隧道施工对管线性状影响的研究。E-mail: johnston_2002@163.com。

通讯作者:
缪林昌

中图分类号: TU470
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- 文章访问数: 431
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出版历程
- 收稿日期: 2013-06-24
- 发布日期: 2014-01-20

Physical model tests and PFC^3D modeling of soil-pipe interaction in sands during tunnelling

1. Southeast University, Nanjing 210096, China; 2. Jiangsu Electric Power Design Institute, Nanjing 210014, China

摘要

摘要: 对砂土中隧道施工引起管线性状变化进行了室内模型试验,分析了管土相互作用的一些宏观特性,为进一步进行三维颗粒流细观模拟提供必要的参数和宏观依据。在室内模型试验的基础上,建立了隧道垂直下穿既有管线颗粒流分析模型,验证了室内模型试验的宏观现象。在此基础上分析了隧道施工过程中管土相互作用的机理、管周土体的应力与位移以及管线的剪应变和弯矩。分析结果可为工程实践中确定管线加固位置提供理论依据。
- 模型试验 /
- 颗粒流 /
- 隧道施工 /
- 管土相互作用 /
- 砂土 /
- 位移
Abstract: A series of 1g physical model tests are carried out to investigate the tunnelling effects on existing pipelines. A tunnel is excavated directly underneath the existing pipeline. The tunneling-induced pipeline deformation mechanism and the stress field around the pipeline are studied. In addition, three-dimensional discrete element back-analyses (PFC^3D) are conducted to improve the understanding of soil-pipe interaction problem. Based on the measured and computed results, change of the tunneling-induced stress, displacement, shear strain and bending moment in the existing pipeline are analyzed. The findings in this study can give theoretical basis for the reinforcement design of pipelines.
- physical model test /
- PFC /
- tunnelling /
- soil-pipe interaction /
- sand /
- displacement

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参考文献(21)

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