软土盾构隧道开挖面支护压力极限上限解

吕玺琳; 王浩然

doi:10.11835/j.issn.1674-4764.2011.02.013

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软土盾构隧道开挖面支护压力极限上限解

更新时间：2023-11-28

- 软土盾构隧道开挖面支护压力极限上限解
- Upper Bound Solution of the Limit Support Pressure during Shield Tunneling in Soft Clay
- 土木与环境工程学报（中英文） 2011年33卷第2期页码：65-69
- 作者机构：
  
  同济大学岩土及地下工程教育部重点实验室,地下建筑与工程系,上海,200092
- 作者简介：
- 基金信息：
  
  国家自然科学基金青年科学基金(50908171);上海市晨光计划(10CG23);同济大学青年优秀人才培养行动计划(2009KJ097)
- DOI：10.11835/j.issn.1674-4764.2011.02.013
  中图分类号：
- 纸质出版：2011
- 稿件说明：
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吕玺琳, 王浩然. 软土盾构隧道开挖面支护压力极限上限解[J]. 土木与环境工程学报（中英文）, 2011,33(2):65-69.

Lü Xi lin, WANG Hao ran. Upper Bound Solution of the Limit Support Pressure during Shield Tunneling in Soft Clay[J]. Journal of Civil and Environmental Engineering, 2011, 33(2): 65-69.
吕玺琳, 王浩然. 软土盾构隧道开挖面支护压力极限上限解[J]. 土木与环境工程学报（中英文）, 2011,33(2):65-69. DOI： 10.11835/j.issn.1674-4764.2011.02.013.

Lü Xi lin, WANG Hao ran. Upper Bound Solution of the Limit Support Pressure during Shield Tunneling in Soft Clay[J]. Journal of Civil and Environmental Engineering, 2011, 33(2): 65-69. DOI： 10.11835/j.issn.1674-4764.2011.02.013.

摘要

考虑到天然软黏土非均质性和各向异性特点

采用极限分析上限法在不排水条件下对盾构隧道开挖面稳定进行了研究

推导了极限支护压力的计算公式.土体非均质性和各向异性对极限支护压力的影响有相互放大作用

在当土体非均质性和各向异性较强时

极限支护压力与隧道埋深的关系存在一个极大值.分析结果表明

在分析软土盾构隧道开挖面稳定性时

土体的非均质性和各向异性影响较大

不能忽略.

Abstract

Considering the nonhomogeneity and anisotropy of the undrained shear strength of soft clay

the face stability of shield tunnel was studied by upperbound limit analysis

and the formula for calculating the limit support pressure was obtained. The influences of nonhomogeneity and anisotropy on the limit support pressure amplify with each other.The relationship between limit support pressure and tunnel depth also depends on the nonhomogeneity and anisotropy; the limit support pressure reaches maximum value at a certain tunnel depth when nonhomogeneity and anisotropy are strong enough. These results show the nonhomogeneity and anisotropy of clays cannot be neglected when analyzing the stability of tunnel face.

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