Surface Deep Hole Grouting Technology for Excavation of Large-section Underground Station Tunnels
The construction of subway stations in dense cities is affected by existing buildings.When ex-cavating small guide tunnels for underground stations,advance support is usually used to reinforce the ground above the guide tunnels.A certain underground excavation station adopts the reverse construction method of one-time buckled arch underground excavation.The construction efficiency of grouting in the hole is limited.Therefore,the deep hole grouting technology on the surface of underground excavation sta-tions was proposed,which not only ensured the quality of ground reinforcement,but also saved the con-struction period.This article discusses in detail the surface deep hole grouting technology under the one-time arch buckling and underground excavation reverse method at the Southeast Lake Road Station.Through the analysis of on-site excavation deformation data,the settlement deformation values and change patterns of the station main body and existing pipelines were revealed,verifying the rationality of surface deep hole grouting reinforcement technology.The results can provide technical support for similar projects.
万方数据
维普
