(1上海建科建设监理咨询有限公司  200032;2 同济大学地下建筑与工程系  上海 200092)
【提要】  结合上海地区十多组钻孔桩静载试验资料，分析钻孔桩侧摩阻力性状，研究了钻孔桩桩侧土体临界位移值的分布特征，并与打入桩进行对比，分析了其影响因素，探讨了钻孔桩与打入桩承载力发挥过程的不同。统计计算了上海地区钻孔桩桩侧摩阻力分布系数，指出该值由于受施工工艺的影响而较传统值偏小。
【关键词】  钻孔桩  桩土临界位移  桩侧摩阻力分布系数  施工工艺 荷载传递
Study on Behavior of Side Resistance of Bored Pile in Shanghai/Zhou Hongbo1,Chen Zhuchang2 (1 Shanghai Jianke Project Management Co.,Ltd.,Shanghai 200032,China; 2 Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China)
Abstract:Based on the load test data of over ten bored piles in Shanghai, the behavors of side resistance of bored piles are analyzed.The distribution characteristics of critical slip between bored pile and soil are studied and the effect factors are presented according to the comparison with the behaviors of driven piles.The difference of development process of bearing capacity between driven pile and bored pile is discussed.Based on the load tests,the distribution coefficient of skin friction is calculated and the average of calculated value is lower than the traditional value induced by the construction technology.
Keywords:bored pile; critical slip; distribution coefficient; skin friction; construction technology; load transfer