市政技术2023，Vol.41Issue(12)：81-88,146,9.DOI:10.19922/j.1009-7767.2023.12.081
双线盾构隧道二次注浆对既有隧道结构影响研究
Study on the Impact of Secondary Grouting in a Double-Iine Shield Tunnel on the Existing Tunnel Structure
摘要
Abstract
Based on Sanshibu Station—Hucheng Road Station section of east extension of Hefei metro line 2 parallel through the existing metro line 2,a sophisticated shield tunnel model was established by FLAC3D software to ana-lyze the impact of the through on the existing tunnel structural settlement under different secondary grouting pres-sures.The findings show that secondary grouting has a significant impact on the settlement of existing tunnel struc-tures.The higher the grouting pressure is,the more significant impact.In order to ensure the existing structural safety,it is recommended to maintain the grouting pressure within 0.3～0.4 MPa for secondary grouting;The mixing ratio of the secondary grouting slurry is cement∶water glass∶water=0.5∶0.5∶1.0;During the through,the maximum settlement value is basically the same as the simulation value.And both exhibit a decreasing trend over time.These research provide engineering reference for new shield tunnels through the existing tunnel structures design.关键词
盾构隧道/二次注浆/既有隧道/注浆压力/数值模拟/结构沉降Key words
shield tunnel/secondary grouting/the existing tunnel/grouting pressure/numerical simulation/struc-tural settlement分类
交通工程引用本文复制引用
杨玉庄,贾森林,张荣锋,郑群,程绍恭..双线盾构隧道二次注浆对既有隧道结构影响研究[J].市政技术,2023,41(12):81-88,146,9.基金项目
安徽省住房城乡建设科学技术计划(2022-YF024) （2022-YF024）
安徽省自然科学基金资助项目(2208085ME149) （2208085ME149）
