地铁抗拔桩荷载-位移模型简化研究及应用  

Simplified study and application of load-displacement model foruplift piles in metro

作　　者：蒋强福 Jiang Qiangfu

机构地区：[1]中铁二院昆明勘察设计研究院有限责任公司,云南昆明650200

出　　处：《现代城市轨道交通》2023年第8期60-65,共6页Modern Urban Transit

摘　　要：为满足地铁设计需求,文章基于常见抗拔桩荷载-位移曲线,首先提出三折线简化模型,给出抗拔桩顶抗拉弹簧刚度计算式,并采用8组实测数据进行验证,确保简化模型合理、可靠;其次,采用Midas Gen建立3个地铁车站三维模型作对比分析;最后通过计算表明,考虑抗拔桩的模型1边界条件更接近工程实际,构件内力及变形均相对合理,建议地铁车站计算时考虑抗拔桩作用。Based on the load-displacement curve of conventional uplift piles,a simplified model of three lines and the calculation formula of tensile spring stiffness at the top of uplift pile are proposed,in order to satisfy the design requirements of metro.It is verified with 8 groups of measured data to ensure that the simplified model is reasonable and reliable.The Midas Gen is used to establish 3D overall models of 3 metro stations for comparative analysis.The calculation results show that the boundary conditions in model 1,that considers uplift piles,are closer to the engineering practice,and the internal forces and displacements of components are relatively reasonable.Considering the effect of uplift piles in the calculation of metro stations is suggested.

关 键 词：地铁车站 抗拔桩 荷载-位移模型 简化研究 应用 

分 类 号：U231.3[交通运输工程—道路与铁道工程]