戴国亮，  龚维明
（东南大学土木工程学院，南京 210096）

[摘要]  为了研究压桩和托桩下的摩阻力相关关系，在广东佛山某公路桥梁桩基的同一根钻孔灌注桩上分别进行了自平衡静载试验（模拟托桩加载）以及传统静载原位试验（模拟压桩加载），对桩侧摩阻力、荷载一位移曲线等进行了比较，结果表明托桩加载的平均摩阻力为压桩加载的0. 72倍，可为类似工程提供参考。
[关键词]  桩；自平衡测试法；静载试验；摩阻力

Field test of friction resistance and negative skin friction of cast-in-situ piles
Dai  Guoliang, Gong Weiming
(College of Civil Engineering, Southeast University, Nanjing 210096, China)
   
Abstract: To research the relationship between friction resistance of top-loaded pile and that of down-loaded pile, self-balanced load test (to simulate down-loaded pile) and traditional static load test(to simulate top-loaded pile) were conducted on the same pile of a highway bridge in Foshan, Guangdong. On the basis of test results, the friction resistance of pile and curve of load versus displacement were compared. The ratio of friction resistance of down-loaded pile to that of top-loaded pile is O.72, which can provides reference for other related projects.
Keywords: pile; self-balanced test method; static load test; friction resistance of pile