Construction Technology of Advanced Pipe Curtain for Large Cross-Section Tunnel in Rich Water Gravel Clay Stratum
This article combines the geological conditions and structural form of the large cross-section tunnel in the area of Banxuegang Science and Technology City of Shenzhen.Firstly,the advantages of pipe curtain pre-support technology are analyzed,and its main process flow,key construction parameters,construction measurement methods,and correction methods are proposed.Additionally,the key technologies of pipe curtain construction are summarized.Secondly,the main process of excavating tunnel by bench methods is advised,and the rationality of the construction plan is verified through the analysis of tunnel deformation monitoring results during the construction process.The practice of this project shows that the technologies of pipe curtain pre-support and bench methods for tunnel excavation have shortened the construction period by 3 months compared to conventional construction methods,which ensures the safe construction of the large cross-section tunnel,and achieves good social and economic benefits.
large cross-section tunnelgravel cohesive soiladvanced pipe curtainbench tunneling method
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