双线盾构隧道开挖参数对诱发地表沉降的影响分析  

Analysis of influence of excavation parameters of double-lineshield tunnel on induced surface settlement

作　　者：王海丰 张佳鑫 赵明喆 王帅飞 姬晓奕 WANG Haifeng;ZHANG Jiaxin;ZHAO Mingzhe;WANG Shuaifei;Jl Xiaoyi(China Com munications Construction Infrastructure Maintenance Group Com pany Limited,Beijing100011,China;University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]中交基础设施养护集团有限公司,北京100011 [2]北京科技大学,北京100083

出　　处：《建井技术》2023年第6期77-84,共8页Mine Construction Technology

基　　金：兵团财政科技计划资助(2023AB016-02)。

摘　　要：以南昌市轨道交通2号线沈桥站至殷王站盾构区间隧道工程为研究对象,通过ABAQUS有限元软件对注浆层厚度、深径比和2条平行隧道间距离对地表沉降的影响进行了综合探讨。研究发现:注浆层厚度与地表沉降量呈反比关系,最佳注浆层厚度为0.30m;深径比的增加会导致地表横向沉降发生先增加后减少的趋势,与土体的拱效应密切相关;此外,2条平行隧道间距的增大与左右隧道地表沉降量的增加呈正相关,在较小的间距下,隧道相互干扰影响增强,呈现“V”形沉降凹槽,而在较大的间距下,相互干扰影响减弱,呈现“W”形沉降凹槽。Taking the shield tunnel project from Shenqiao Station to Yinwang Station of Nanchang RailTransit Line 2 as the research object,the influence on land surface settlement of grouting layer thick-ness,depth-diameter ratio and distance between two parallel tunnels on land surface settlement wasstudied by ABAQUS finite element software.The results showed that the thickness of grouting layerwas inversely proportional to the surface settlement,and the optimal grouting layer thickness was0.30 m.With the increase of depth-diameter ratio,the transverse settlement of the surface would firstincrease and then decrease,which was closely related to the arch effect of the soil.In addition,the increase of the spacing of the two parallel tunnels was positively correlated with the increase of the surface settlement of the left and right tunnels.At a smaller spacing,the mutual interference of the tunnels was enhanced,showing a“V”shaped settlement groove,while at a larger spacing,the mutualinterference was weakened,showing a“w”shaped settlement groove.

关 键 词：盾构挖掘 地表沉降 数值模拟 注浆层厚度 深径比 平行隧道间距离 

分 类 号：TD325.2[矿业工程—矿井建设]