Analysis on the Structural Design Essentials of Subway Station by Top-down Bored Excavation Reverse Method with Cast-in-situ Arch
With the rapid development of urban subway,subway lines usually pass through densely populated and busy areas with numerous surface transportation and buildings,as well as complex underground pipelines in the bustling downtown area.The construction of subway stations by undermining method has obvious advantages in avoiding pipeline relocation,reducing traffic impact and improving construction environment and so on.However,it also has the characteristics such as limited construction conditions,complex structural force conversion,and unfavorable deformation control.Based on Dawanglu Station project of Beijing Subway Line 14,the necessary conditions for using the full-face excavation method due to limited conditions are analyzed.The force system and key technologies of the construction process and stratum deformation control are systematically analyzed and summarized using theoretical analysis,numerical calculation,and on-site monitoring for the top-down bored excavation method with cast-in-situ arch.The stress and deformation laws of this type of station construction are revealed.
万方数据
维普
