回填土区浅埋盾构隧道开挖地层响应分析  

Response Analysis of Shallow Buried Shield TunnelExcavation Stratum in Backfill Soil Area

作　　者：徐世红 牛云峰 阳文通 陈锐 谭芝文 Xu Shihong;Nu Yunfeng;Yang Wentong;Chen Rui;Tan Zhiwen(China Construction Tunnel Co.,Ltd.,Chongqing 401320,China;Chongqing Rail Transit(Group)Co.,Ltd.,Chongqing 401320,China;Tie'eryuan Consulting Supervision Company,Chengdu 610000,China)

机构地区：[1]中建隧道建设有限公司,重庆市401320 [2]重庆市轨道交通(集团)有限公司,重庆市401320 [3]中铁二院咨询监理有限责任公司,成都市610000

出　　处：《北方交通》2023年第7期75-78,共4页Northern Communications

基　　金：中国建筑第五工程局有限公司科研课题(cscec5b-2020-06);重庆市建设科研计划项目(城科字2021第8-2)。

摘　　要：为分析回填土地层中浅埋盾构隧道的土舱压力设置对地层变形的影响问题,根据重庆轨道交通五号线北延伸段工程区间隧道施工过程建立盾构施工数值模型,设置监测断面,对不同开挖阶段和不同土舱压力下的地层变形情况和沉降曲线进行了提取和分析。研究结果表明:在依托工程条件下,盾构隧道掘进施工过程中引起的地表沉降槽幅宽在3倍洞径左右,土舱压力取值为0.125MPa左右时对地层变形的影响最小。In order to analyze the influence of soil chamber pressure setting of the shallow buried shield tunnel in the backfill soil stratum on the stratum deformation,the numerical model of shield construction is established based on the construction process of the northern extension section of Chongqing rail transportation line 5,and the monitoring section is set up,so as to extract and analyze the stratum deformation and settlement curves under different excavation stages and soil chamber pressure.The research results show that,under the conditions of the project,when the width of the ground surface settlement groove caused by the shield tunneling construction is about 3 times of the tunnel diameter,and the soil chamber pressure is set at around 0.125MPa,the influence on the stratum deformation is minimal.

关 键 词：地铁 盾构隧道 有限元 数值模型 回填土区 土舱压力 地层变形 

分 类 号：U45[建筑科学—桥梁与隧道工程]