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

作　　者：赵顺波[1] 崔豪 何银涛 杨亚彬[1] 张智晓 袁林 ZHAO Shunbo;CUI Hao;HE Yintao;YANG Yabin;ZHANG Zhixiao;YUAN Lin(Collaborative Innovation Center for Efficient Utilization of Water Resources,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;Anyang Zhongzhou Water Supply Co.,Ltd.,Anyang 455000,China)

机构地区：[1]华北水利水电大学黄河流域水资源高效利用省部共建协同创新中心,河南郑州450046 [2]安阳中州供水有限公司,河南安阳455000

出　　处：《水资源与水工程学报》2024年第3期201-206,216,共7页Journal of Water Resources and Water Engineering

基　　金：河南省一流学科创新团队项目(CXTDPY-6);河南省高等学校基础研究重点科研项目(22A560012);郑州市科技协同创新专项(HSZ2021013)。

摘　　要：水工盾构隧洞在运行过程中存在内水渗漏导致基底软化的风险,基底软化将对隧洞管片受力变形产生影响。依托实际水工盾构隧洞工程,构建了由管片、灌浆体和围岩组成的三维有限元数值模型,针对Ⅴ类围岩条件下因渗漏导致基底均匀和不均匀软化的状况,研究了管片的受力性能变化规律。结果表明:在内外荷载作用下,管片的环向应力、竖向位移和定位销应力均随基底软化深度的增加而增大,均匀软化条件下仰拱管片出现峰值为1.88 MPa的拉应力,存在管片开裂风险;基底软化导致定位销应力增大,而管片竖向位移的变化幅度较小。研究成果可为水工盾构隧洞的安全运行监测提供科学依据。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 performance 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 circumferential 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 under 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 displacement 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 

分 类 号：U451[建筑科学—桥梁与隧道工程] TV672[交通运输工程—道路与铁道工程]