港珠澳大桥沉管隧道运行情况

Operational condition of the immersed tunnel in Hongkong-Zhuhai-Macao Bridge project

通过监测数据分析论述港珠澳大桥岛隧工程沉管隧道自2013年5月—2017年10月整个施工期的运行状况,监测内容包括沉降、差异沉降、管节纵向结构挠度、管节接头张合量、节段接头张合量、节段接头水压以及隧道整体情况。结果表明,沉管管节实际差异沉降得到较好的控制,复合地基+组合基床使得沉降得到改善,隧道整体运行情况与结构反应良好,整体与接头基本没有渗漏水情况。

Through monitoring data, we analyzed the operational conditions of the immersed tunnel of Hongkong -Zhuhai-Macao island and tunnel project in the whole construction period since May 2013 to Oct. 2017. The monitored informationincludes settlement and differential settlement, element longitudinal deflection, element joint opening and closing, segmentedjoint opening and closing, segmented joint water pressure, and the overall condition of the tunnel. The results show that theactual differential settlement of the immersed tunnel section is well controlled. The composite foundation and the combinedfoundation bed make the settlement improved. The overall operation of the tunnel is in good response with the structure, andthere is no leakage of water at the whole and the joint.