寒区隧道施工中地表沉降变形监测与数值模拟研究  

Analysis of Monitoring and Numerical Simulation of Surface Settlement &Deformation During Tunnel Construction in Cold Regions

作　　者：张雨龙 Zhang Yulong(China Railway 18th Engineering Group Third Engineering Co.,Ltd.,Zhuozhou 072750,China)

机构地区：[1]中铁十八局集团第三工程有限公司,河北涿州072750

出　　处：《市政技术》2023年第9期113-119,共7页Journal of Municipal Technology

摘　　要：为了研究寒区隧道地表沉降变形特性,以长春市地铁7号线一期工程东南湖大路站—赛德广场站区间隧道为研究对象,采用现场监测和数值模拟等方法对寒区隧道施工中支护与地表变形进行了探究。研究结果表明:设置超前支护结构后,隧道地表整体沉降趋势满足Peck曲线规律,最大沉降值为25.7 mm;拱顶沉降分为缓慢增长阶段、快速增长阶段和平稳增长阶段;最大主应力整体上呈受拉状态,拱顶和拱底处最小主应力也呈受拉状态。现场地表布设了监控量测点,数值模拟地表沉降与实测数据的变化趋势相似,结果均满足规范要求,可为类似工程提供一定的参考。In order to study the surface settlement and deformation characteristics of tunnels in cold regions,the tunnel between Southeast Huda Road Station-Saide Square Station of the first phase of Changchun Metro Line 7 was taken as the research object.The support and surface deformation was investigated by field monitoring and numerical simulation methods during tunnel construction in cold regions.The research results indicate that the overall settlement trend of the tunnel surface follows the“Peck curve”law with a maximum value of 25.7 mm after setting the advanced support structure;The settlement at the top is divided into slow growth stage,rapid growth stage and stable development stage;The maximum principal stress is mostly in tension,while the minimum principal stress at the top and bottom of the arch is in tension too.Monitoring measurement points are set up on the site surface.The surface settlement by numerical simulation consistent with the changing trend by monitoring measurement data.The results meet the standard requirements which can provide a certain reference for similar projects.

关 键 词：寒区隧道 地表沉降 拱顶沉降 现场监测 数值模拟 

分 类 号：U45[建筑科学—桥梁与隧道工程]