顶管施工中自锁式液压千斤顶止退装置的研制与应用  

Development and Application of Self-locking Stop Device of Hydraulic Jack for Pipe Jacking Construction

作　　者：徐经纬 Xu Jingwei

机构地区：[1]上海隧道工程有限公司

出　　处：《隧道与轨道交通》2023年第4期41-45,70,共6页Tunnel and Rail Transit

摘　　要：顶管止退装置是顶管法隧道掘进施工、拼装管节时,防止顶管机和已经拼装的管节在开挖面土压力的作用下向掘进反方向移动的结构。研究设计出一种自锁式液压千斤顶止退装置,能够在保证顶管施工管节有效止退的前提下,调节止退推力可达到与开挖面土压力平衡,并且具有机械式自锁功能。其结构简单、稳定性高,可保证在液压系统失效时实现机械结构止退,并且利用该止退装置也可实现顶管短距离微顶进。该止退装置主要适用于深埋、大顶管隧道工程中,也可扩展应用于其他轨道交通暗挖工程中。The jacking stop device is a structure that prevents the jacking machine and the assembled pipe segments from moving in the opposite direction of jacking under the soil pressure on the excavation face during the assembly of the pipe segment.A self-locking stop device of a hydraulic jack is designed.On the premise of guaranteeing effective stop of pipe segments in jacking construction,the thrust of the stop device can be adjusted to balance the earth pressure on the excavation face.The stop device is featured with a simple structure,and high stability,with a mechanical self-locking function.It can realize the stop function in case of the failure of the hydraulic system,and can also realize short-distance jacking.The stop device is mainly suitable for deep-buried and large pipe-jacking tunnels and can be applied to other underground excavation projects of rail transit.

关 键 词：顶管法 顶管止退装置 机械自锁 推力可调 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]