Research on Formation Deformation of Arch Prestressed Anchor in Different Supporting Directions in Underground Excavation Station Construction
In traditional underground station construction,temporary support is set up in the hole to help resist the deformation of surrounding rock,which has many problems such as long construction period,diffi-cult demolition and high cost.Based on the background of new underground subway station,this paper studies the formation deformation of large section tunnel construction with partial step method and prestressed bolt support by numerical calculation.The research structure shows that the arch roof settlement is the main as-pect of station settlement in excavation construction,and the station settlement tends to be stable after the arch support is completed.The construction method of partial step method and vertical layout of prestressed anchor at arch is more favorable to the formation deformation control.The vertical layout of prestressed an-chor at arch is more favorable,and the arch roof settlement is 7.7 mm after the station excavation.The verti-cal arrangement of prestressed anchor in the arch is more beneficial to the deformation control of surrounding structures,and the arch roof settlement is 10.4 mm after the station excavation is completed.The research re-sults can provide reference for similar projects.
mined metro stationprestress anchorsupport directionactive supportstratum deformation
万方数据
维普
