高水压顶管隧道管节修复装置的设计与应用

以富春江顶管工程为例,介绍了一种可快速拆卸的用于深埋顶管隧道对管节局部破损进行修复的装置。装置结构简单、紧凑,易于在圆形截面的隧道中进行快速拼装。该装置最高耐水压力0.8 MPa,可对地下水位以下30~80 m顶管隧道中出现沿轴线长0.4 m环状破损的管节进行注浆修复。这种设计能够有效解决深埋顶管隧道小面积局部破损、小范围漏水涌砂等问题,为深埋顶管等方法构筑的圆形隧道提供应急修复保障。

Design and Application of a Pipe Section Repair Device for High Water Pressure Pipe Jacking Tunnel

Taking Fuchun River pipe jacking engineering as an example, this paper introduces a quick-detachable device for local damage on pipe section in deep buried pipe jacking tunnel, which has simple and compact structure and is easy to be assembled in the tunnel with circular cross-section. With the maximum tolerance of water pressure of 0.8MPa, this device can repair damaged pipe section less than 0.4m along the axis at 30~80m below the groundwater level by grouting in pipe jacking tunnel to effectively deal with small area local damage and small scale water leakage & sand gushing, and it can provide emergency repair supports for circular cross-section tunnel constructed with pipe jacking method.