滴水湖地下交通枢纽工程抗拔桩设计研究  

Study on Uplift Pile Design for Underground Traffic Hub Project of Dishui Lake

作　　者：俞震中 

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海200125

出　　处：《中国市政工程》2018年第3期24-26,共3页China Municipal Engineering

摘　　要：针对滴水湖地下交通枢纽工程的抗浮设计问题展开研究,比较软土地区扩底钻孔灌注桩与常规等径钻孔灌注桩布桩方案的适用性、灵活性与经济性。通过采用允许不同材质间可滑动摩擦的接触单元进行有限元模拟,揭示桩体和土体的应力分布及在桩顶竖向上拔力作用下对桩身周边土体的影响,并以现场足尺试验的结果与数值分析相比,进一步分析扩底桩实际抗拔承载力与规范推荐值间的差距。相关结论可供类似工程参考。In view of the anti-floating design problem of the underground transportation hub in Dishui Lake area, the applicability, flexibility &economy of the bored pile & the conventional equal diameter bored pile are compared in the soft soil area. Through the finite element simulation of the contact element which allows the sliding friction between different materials, the stress distribution of the pile & soil and the effect of the vertical uplift of the pile on the soil surrounding the pile body are revealed. Comparing the results of field full-scale tests with numerical analysis, the gap between the actual pull-out capacity of the enlarged bottom piles& the recommended values of the specifications is further analyzed. The related conclusions can be used as reference for similar projects.

关 键 词：钻孔扩底桩 抗拔桩 承载力分析 数值分析 足尺试验 

分 类 号：TU473[建筑科学—结构工程]