地下水对通过含水砂层段暗挖隧道施工的影响及控制方案研究

Study on the Influence and Control Scheme of Groundwater on the Undercut Tunnel Construction Passing Through Water Bearing Sand Section

地下水对城市轨道交通建设具有不可忽视的重要影响。以青岛地铁嘉灵区间为依托工程,在分析地下水类型的基础上,研究地下水对区间隧道安全的影响,并提出控制方案。研究结果表明:区间经过区域地下水水量较大,应对暗挖区间隧道采用洞内止水帷幕注浆,必要时进行地面高压旋喷注浆止水。

Groundwater has an important influence on urban rail transit construction. Taking the Qingdao metro Jialing transit tunnel as the basics project, based on the analysis of groundwater type,this paper studies the influence of groundwater on the safety of interval tunnels, and puts forward the control scheme. The results show that there is a large amount of groundwater in the transit tunnel area, at the same time, underground tunnel shall be excavated with cut-off wall, When necessary, it should carry out high-pressure jet grouting to stop water on the ground.