港珠澳大桥珠海连接线拱北隧道高水压条件曲线管幕顶管始发接收技术

High Water Pressure Curve Screen Pipe Jacking and Receiving Technology of Gongbei Tunnel of Zhuhai Connecting Line of the Hong Kong-Zhuhai-Macao Bridge

拱北隧道暗挖段曲线管幕工程是港珠澳大桥珠海连接线的关键控制性工程,地处珠三角海陆交互相沉积地层,地质条件复杂、地下水丰富且水压大,因此顶管的始发、接收是本工程的重难点。通过曲线管幕群管始发、接收施工中遇到的问题及成功经验,对始发、接收端土体加固措施、止水装置、止水措施及顶管关键技术进行分析,总结出一套科学、成熟的始发和接收关键技术及组织模式。

Gongbei tunnel excavation section curve pipe roof project is the key control project in Zhuhai connecting line of Hong Kong-Zhuhai-Macao Bridge, located in the Pearl River Delta marine deposits formation with complex geological conditions, abundant water and water pressure, so pipe jacking originating, receiving is the key and difficulty of the project. In this paper, through the curve pipe curtain group tube originating, receiving problems encountered in the construction and successful experiences, the originating and receiving end soil reinforcement measures, sealing device and sealing measures pipe jacking and key technology were analyzed, it summed up a set of science, mature originating and receive key technology and organization pattern.