【作者】 楼晓明； 周建武； 杨敏；

【Author】 LOU Xiao-ming, ZHOU Jian-wu, YANG Min Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

【机构】 同济大学地下建筑与工程系；

【摘要】 对API新老规范法中砂性土极限抗力分布和p-y曲线的特性进行了对比分析;结合工程实例,分别用这两种p-y曲线法计算的桩顶水平位移和弯矩分布与实测值进行了比较分析.其中桩顶水平位移采用位移计测定,弯矩由钢筋应变计得到,桩型为预制方桩.通过对比分析,表明原规范法的极限土抗力要较新法保守,新法的p-y曲线对于深度的敏感性要强于原规范,且新法易于编程计算;新老规范法的计算值均要大于实测值,其中新法较原规范法更接近实测值.更多还原

【Abstract】 Characteristic of lateral ultimate resistance and p - y curves of sand have been analyzed through com- paring the former p - y curve with present one of API. Combined with practice case, the horizontal displacement and moment of the piles have been compared between computed by p - y curves and measured values. In the practice case, the horizontal displacement of prefabricated square pile is surveyed by displacement meter, the moment is obtained by strain gauges. Based on the above analysis, it can be concluded that the lateral ultimate resistance of former p - y curve was more conservative than the present one of API, and that the present p - y curves is more sensitive to depth and more suit for calculation, and that the head displacement and moment of pile which computed by the present p - y curve is demonstrated more close to measured ones.更多还原