Research on Construction Technology of Precipitation Reinforcement for Shallow Buried Water-Rich Pebble Soil Layer Tunnel
In the tunnel construction in the plateau mountain environment,shallow buried tunnel construction in the valley environment is often involved.Due to the accumulation and erosion of rainfall and mountain underground water flow,affected by hydrogeological conditions,the formation in this area is mainly pebble soil,and the formation is rich in water,and even resulting in underground gushing formation and other bad construction environment.The effect of simply grouting reinforcement is not ideal for the treatment of flowing water in underground gushing formation.In this paper,a study was conducted on the surface reinforcement and dewatering technology of shallow buried tunnels.The results show that the use of bite pile water cutoff curtain+well point dewatering+grouting reinforcement+underground excavation construction technology can effectively solve the problem of groundwater development and has active effect on treating underground surging water.The verification test results show that the grouting process has a significant effect on improving the uniaxial compressive strength of the surrounding rock in the original formation.
shallow buried tunnelweak surrounding rocksurface groutingcurtain groutingwell point precipitation
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