曲线形态隧道区间水平位移监测方法探讨  

Discussion on Monitoring Method of Horizontal Displacement in Curved Tunnel Section

作　　者：安江雷 高建东[1] 徐炜 AN Jianglei;GAO Jiandong;XU Wei(Jiangsu Province Surveying&Mapping Engineering Institute,Nanjing 210013,China)

机构地区：[1]江苏省测绘工程院,江苏南京210013

出　　处：《地理空间信息》2022年第12期148-150,共3页Geospatial Information

基　　金：国家重点实验室开放基金资助项目(SKLGED2020-4-2-E)。

摘　　要：紧邻地铁隧道的基坑开挖会引起隧道周围地层移动,导致地铁隧道的变形和位移,因此根据地铁隧道实际情况选择合适的监测方法,是确保地铁安全运行的重要技术手段。以曲线形态地铁隧道监测保护为例,探讨曲线形态隧道区间水平位移监测方法及精度评定,提出利用监测点拟合出轨道圆心,通过计算监测点半径变化量来评定水平位移监测结果,可为类似工程的变形监测提供参考。The excavation of foundation pit adjacent to the subway tunnel will cause the ground around tunnel to move,resulting in the deformation and displacement of subway tunnel.Choosing the appropriate monitoring method according to the actual situation of subway tunnel is an important technical means to ensure the safe operation of the subway.Taking the monitoring and protection of subway tunnel in curve form for example,we discussed the horizontal displacement monitoring method and accuracy evaluation of curved tunnel section.We proposed that the monitoring point to fit the center of orbit should be used and the horizontal displacement monitoring result should be evaluated by the radius variation of monitoring point.This study can provide ideas and references for deformation monitoring of similar projects.

关 键 词：基坑开挖 曲线隧道 水平位移 精度评定 

分 类 号：P258[天文地球—测绘科学与技术]