水资源与水工程学报2024，Vol.35Issue(3)：201-206,216,7.DOI:10.11705/j.issn.1672-643X.2024.03.23
内水渗漏软化基底对盾构隧洞衬砌管片受力性能的影响分析
Bearing performance of shield tunnel lining segments affected by softened base due to internal water leakage
摘要
Abstract
There is a risk of foundation softening caused by internal water leakage during the operation of hydraulic shield tunnels,which will affect the loading capacity and deformation of lining segments.Based on an engineering hydraulic shield tunnel,a three-dimensional finite element numerical model of tunnel segments,peastone grouting and surrounding rock was built to analyze the variation of bearing perform-ance of lining segments under uniform and non-uniform softened base caused by internal water leakage with class-V surrounding rock.Results show that under the actions of internal and external loads,the cir-cumferential stress,vertical displacement of segments and the stress of assembling pin increase with the increase of the softening depth of the base.The peak tensile stress of the invert segment is 1.88 MPa un-der uniform softening condition,which increases the risk of segment cracking.The base softening leads to the increase of the peak stresses of the assembling pins,but only has a slight influence on the vertical dis-placement of the segments.The research can provide a technical basis for the safe operation monitoring of hydraulic shield tunnels.关键词
水工盾构隧洞/衬砌管片/基底软化/内水渗漏/数值分析Key words
hydraulic shield tunnel/lining segment/base softening/internal water leakage/numerical analysis分类
交通工程引用本文复制引用
赵顺波,崔豪,何银涛,杨亚彬,张智晓,袁林..内水渗漏软化基底对盾构隧洞衬砌管片受力性能的影响分析[J].水资源与水工程学报,2024,35(3):201-206,216,7.基金项目
河南省一流学科创新团队项目(CXTDPY-6) （CXTDPY-6）
河南省高等学校基础研究重点科研项目(22A560012) （22A560012）
郑州市科技协同创新专项(HSZ2021013) （HSZ2021013）
