浅埋偏压隧道变形监测方法及变形规律研究  

Research on Deformation Monitoring Method and Deformation Law of Shallowly Buried Tunnels with Bias-pressure

作　　者：刘志强 LIU Zhi-qiang(Zhili Science and Technology Inc.,Hunan,Changsha 410205,China)

机构地区：[1]湖南致力工程科技有限公司,长沙410205

出　　处：《价值工程》2019年第25期179-180,共2页Value Engineering

摘　　要：为研究浅埋偏压断层公路隧道洞口段变形观测方法及变形规律,采用全站仪对边测量及高差测量的方法,对雅溪冲隧道进口地表沉降、围岩收敛及拱顶下沉进行变形监测,得出如下结论:1浅埋偏压断层公路隧道洞口段围岩变形分为急剧变形、缓慢变形及基本稳定三个阶段;2周边位移、拱顶下沉及地表下沉变形趋势同步;3围岩稳定性,可通过变形速率、变形-时间曲线的变化趋势来综合判定;④采用环形开挖预留核心土施工的隧道,可采用全站仪进行观测.In order to research on the method of deformation monitoring and deformation law of tunnel portal section of fault tunnel of highway shallow buried bias pressure,the means of total -station instrument for opposite side measurement and elevation difference measurement was utilized.After monitoring the ground settlement,convergence of surrounding rocks and dome sinking of the Yaxichong tunnel,I got the conclusions drawn as follows: First,the surrounding rock deformation of tunnel portal section of fault highway tunnel of shallow buried bias pressure was divided into three stages: dramatical deformation,slow deformation and basic stability.Second,there was a synchronic trend of peripheral displacement,dome sinking and surface submerging and deformation.Third,the stability of surrounding rocks could be judged comprehensively by the tendency of deformation rate and deformation-time curve.Fourth,I found that it was accessible to observe tunnels conducted by construction with circular excavation and core soil reservation by total-station.

关 键 词：高速公路 隧道监控量测 浅埋偏压 洞口 变形规律 

分 类 号：U452.11[建筑科学—桥梁与隧道工程]