自动化监测技术在天津地铁3号线金狮桥站—天津站站盾构穿越高速铁路工程中的应用

为解决对盾构施工影响范围内的高速铁路沉降监测问题,以天津地铁3号线金狮桥站—天津站站盾构施工为依托,对既有城际铁路进行自动化监测。主要研究内容及结论为:1)介绍该工程穿越城际铁路情况及高铁监测特点和需求,说明高铁监测中必须实施自动化监测手段;2)高铁监测项目较多,对路基及钢轨沉降自动化监测重点项目进行研究;3)结合铁路特点进行静力水准和自动全站仪2套自动化系统的测点布设以及在实施过程中的注意事项,说明只有充分考虑环境特殊性才能有效发挥每种自动化监测手段的预期效果;4)通过数据比较,发现两者稳定性较好,说明采用智能型电子全站仪加棱镜监测手段解决目前钢轨自动化监测难题的手段是可靠的,为以后的高铁钢轨自动化监测提供一种新思路。

Application of Automatic Monitoring Technology in Construction of Shield-bored Metro Tunnel Crossing Underneath High-speed Railway in Urban Area

The shield-bored tunnel from Jinshiqiao Station to Tianjin Railway Station Station on No.3 Line of Tianjin Metro crosses underneath Beijing-Tianjin high-speed railway. During the construction of the shield-bored tunnel, automatic monitoring is made for the high-speed railwy.The main content of the article is as follows：1 ）The details of the shield boring crossing underneath the existing high-speed railway lines,as well as the features and requirements of the monitoring of the high-speed railway,are presented.It is concluded that automatic monitoring must be made for the high-speed railway.2 ） Many items of the high-speed railway should be monitored.In the paper,the automatic monitoring of the subgrade and steel rail of the high-speed railway is studied.3）The layout of the monitoring points of the hydrostatic leveling monitoring and that of the total station monitoring,as well as the issues to which special attention should be paid,are presented in detail.It is concluded that the effect of each monitoring method cannot be maximized until the particularity of the specific environment is considered.4）The analysis on the monitoring data shows that the automatic monitoring system consisting of intelligent electronic total station monitoring and prism monitoring is reliable in the monitoring of the high-speed railway.The paper can provide a new concept for the automatic monitoring of the steel rails of high-speed railways in the future.