隧道防水板与初支之间空洞预埋高压注浆管注浆处理

Grouting Treatment of Pre-buried High-pressure Grouting Pipe Between Tunnel Waterproofing Plate and Primary Branch

作为隧道初期支护保护的主要手段之一,隧道二次衬砌作业的开展可有效提升围岩及其支护的稳定性。但是因一些因素影响,致使二次衬砌出现背后孔洞问题。二衬背后空洞的存在,不仅影响到隧道整体结构的稳定性,亦会加大隧道施工的安全风险。以隧道二衬背后孔洞分类的分析为切入点,进一步阐述预埋高压注浆管施工技术在背后空洞问题治理中的应用。

As one of the main means of tunnel initial protection,the secondary lining operation of the tunnel can effectively improve the stability of surrounding rock and its support. However,due to some factors,the problem of holes behind the secondary lining occurred. The existence of voids behind the second lining not only affects the stability of the overall structure of the tunnel,but also increases the safety risk of tunnel construction. This article takes the analysis of the hole classification behind the second lining of the tunnel as an entry point,and further expounds the application of the pre-buried high-pressure grouting pipe construction technology in the treatment of the back hole problem.