顶进节段法最终接头测控技术研究与应用

Research and application of closure joint measurement and control technology by jacking segmental method

大连湾海底隧道采用顶进节段法最终接头,顶进节段无安装测量塔条件,且全程为水下施工,传统定位设备难以使用,给最终接头顶推水下定位提出了新的技术难题,为此研究以拉线位移计、摄像位移计、磁致位移传感器三者组合而成的最终接头水下定位系统,实现最终接头顶推施工全程高精度定位。

The closure joint of Dalian Bay immersed tunnel adopts the jacking segmental method.There is no condition for installing measurement towers in the jacking segment,and the entire process is underwater construction.Traditional positioning equipment is difficult to use,which poses new technical challenges for underwater positioning by jacking the closure joint.Therefore,a underwater positioning system for the closure joint,which is composed of a combination of a wire displacement meter and a camera displacement meters,and a magnetic displacement sensor,is studied to achieve the high-precision positioning throughout the entire process of the closure joint jacking construction.