天津大直径盾构隧道明挖段防水施工技术

Waterproofing Technique of the Open Excavated Section of the Large Diameter Shield Tunnel,Tianjin

天津某大直径盾构隧道明挖段结合工程实际情况,采用了三重管高压喷射注浆法来进行止水帷幕的施工。介绍了该工程的地质水文情况、高压旋喷桩止水施工技术,以及隧道明挖段主体结构的底板与侧墙、顶板、变形缝、施工缝等处的防水施工工艺。

Based on the construction situation, the open excavated section of the large diameter shield tunnel, Tianjin adopts triple-pipe high-pressure jet grouting method for the construction of waterstop curtain. The article introduces geological and hydrological conditions, high-pressure rotary jet grouting pile and waterproofing construction technology of the open excavated section with the focus on the location of bottom plates, side walls, roofs, deformation joints and construction joints.