矩形顶管通道地铁站内斜交接收关键技术

Key Technology of Oblique Receving by Rectangle Pipe Jacking Passage within Metro Station

摘要: 福州地铁4号线金牛山站2号出入口矩形顶管工程采用地铁站内斜交接收施工工艺，隧道轴线与接收井洞口平面呈15˚斜角，斜交接收工况下顶管机和土体稳定性直接关系接收的成败。本文以矩形顶管斜交接收工程为研究背景，详细分析了接收端洞口采用钢管棚及拉伸钢板桩补强加固土体、环箍注浆止水、顶管分次接收及管节切割洞门封堵等斜交接收关键技术和经验，可为矩形顶管隧道斜交接收的同类工程提供参考。

Abstract: Jinniu station of Fuzhou metro Line 4, which using rectangle pipe jacking method to construct No2 exit, applies the technology of oblique receving within metro station. Tunnel axis and receiving shaft plane with inclination angle of 15˚. The stability of soil around pipe jacking machine with oblique receving method directly affect whether receving is successful or not. This research takes oblique receving method by rectangle pipe jacking as a reference, it fully analyzed the key technology of oblique soil receving such as soil reinforcement by steel pipe shed and stretch steel sheet pile, water stoppage by hoop grouting, pipe jacking receiving in stages, pipe joint cutting and sealing of shaft. The successful construction of the project gives reference to similar project using oblique receving method by rectangle pipe.