地基InSAR在施工隧道洞口边坡监测中的应用  

Application of Ground-based InSAR in Slope Monitoring of Tunnel Portal During Construction

作　　者：余飞[1] 金林 徐乔 YU Fei;JIN Lin;XU Qiao(CCCC Second Highway Survey and Design Institute Co.,Ltd.,Wuhan,Hubei 430056,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,湖北武汉430056

出　　处：《施工技术（中英文）》2023年第13期79-83,125,共6页Construction Technology

基　　金：湖北省重点研发计划(2021BAA185);中交二公院科技研发项目(KJFZ-2020-012)。

摘　　要：地基InSAR是近年发展起来的基于地基SAR获取地表形变的一种新的技术手段,分辨率高、可实时监测,实现毫米级甚至亚毫米级形变监测精度,为近距离滑坡实时监测与预警提供了先进的技术手段。针对施工隧道洞口段边坡稳定性监测问题,采用了一种在三维激光雷达扫描辅助下基于地基InSAR的隧道洞口边坡形变监测方法,并对该方法的流程和关键技术进行了详细介绍,最后在湖北咸宁某高速公路的施工隧道洞口开展了应用测试。试验表明,地基InSAR可以满足隧道洞口施工掘进过程中持续实时的高精度变形监测,有效探测到隧道钻爆时隧道洞口边坡的微小影响,并获得敏感区域的形变区域及时间变化历程,能为隧道施工过程中的洞口稳定性评估和应急抢险提供重要的基础资料。Ground-based InSAR is a new technical means to obtain surface deformation based on groundbased SAR developed in recent years.It provides an advanced technical means for real-time monitoring and early warning of close-range landslides because of its high resolution,real-time monitoring,and millimeter-level or even sub-millimeter-level deformation monitoring accuracy.Aiming at the problem of slope stability monitoring at the portal section of construction tunnel,a method of slope deformation monitoring at the portal section of the tunnel based on ground-based InSAR with the assistance of threedimensional lidar scanning is adopted,and the technical process and key technologies are elaborated.Finally,an application test was carried out at the portal section of construction tunnel of a highway in Xianning City of Hubei Province.The test shows that the ground-based InSAR can meet the continuous real-time high-precision deformation monitoring during the tunneling process of the tunnel portal,effectively detect the slight influence of the tunnel portal slope during the tunnel drilling and blasting,and obtain the deformation area and time change process of the sensitive area,which can provide important basic data for the stability evaluation and emergency rescue of the tunnel portal during the tunnel construction process.

关 键 词：地基 INSAR 隧道 边坡 变形 监测 

分 类 号：TU753[建筑科学—建筑技术科学]