不同砂土密度对竖直桩轴向抗拔承载力的影响  

Influence of Sand Density on Axial Uplift Capacity for Vertical Piles

作　　者：徐和[1] 陈竹昌[1] 

机构地区：[1]同济大学地下工程系

出　　处：《特种结构》1996年第2期53-57,共5页Special Structures

基　　金：上海市建设技术发展基金

摘　　要：本文介绍了在室内钢圆筒中，采用不同砂土干容重，进行了模型单桩的轴向抗拔力的模型试验，模型极采用外径Ｄ为３５ｃｍ、入土深度Ｌ＝１００ｃｍ的硬质铝合金桩。由试验结果计算获得了砂土内摩擦角与桩的侧向抗拔系数间的关系曲线，并将本次试验所得之抗拨系数Ｋｕ值与有关文献推荐的Ｋｕ值进行了比较。讨论了考虑临界埋深比与不考虑时计算结果间的差异。同时还应用临界埋深比获得的Ｋｕ值，计算其它模型桩与现场桩的抗拔承载力，其结果与实测值相当的吻合。The model tests of axial uplift capacity for veritcal piles in sand at drydensities ranging fram 1. 42to 16.5SKN/m3 have been performed in circular steel tank.The model piles used in this investigation were D=3. 5cm in outside diameter and embedment depth L=100cm, which were made of hard alloy aluminium.The relationship curves between angles of iniernal friction and lateral uplift coeffiof cients deained fram experimental results are presented in the paper.After the effect of critical depth were considered, a serfies of curses for estimatlviguplift capacities related to friction angle of sand & and slenderness raiio of pile L/D areproposed in the paper.

关 键 词：竖直桩 砂土 密度 承载力 模型试验 

分 类 号：TU473.11[建筑科学—结构工程]