地下水自动回灌高铁隧道保护应用研究

Application Research on Groundwater Recharge Automatically High-speed Rail Tunnel Protection

地下水回灌是应对基坑降水所引起的周边建构筑物变形的有效方法之一,本文通过地下会回灌技术在临近高铁隧道基坑中的成功应用,选择隧道坐落的承压含水层作为回灌目的层,在高铁隧道控制要求极其严格的条件下,通过一整套的自动化回灌控制系统,将坑外承压水水位始终控制在较小的范围波动,将整个基坑降水对隧道结构的影响见到了最低,在确保隧道结构变形满足要求的前提下,基坑顺利开挖至基底。

Groundwater recharge is dealing with the foundation pit precipitation caused by the deformation of the buildings/structures surrounding one of the effective method,this article through underground near will recharge technology in high-speed rail tunnel excavation,the successful application of tunnel is located in the confined aquifer is chosen as the injection layer,in the high speed rail tunnel control very strict conditions,through a complete set of automatic injection control system,to control the pit outside the confined water level always smaller range of fluctuation,the whole foundation pit precipitation influence on tunnel structure meet the minimum,to ensure the tunnel structure deformation and meet the requirements under the premise of foundation pit excavation to the basement.