摘要
现有水平承载高桩的计算方法（虚拟嵌固点法、联邦德国规范法以及ｍ法）不宜用于大变位水平承载高桩的计算。Ｐ－Ｙ曲线法能全面地反映桩的工作性状，可以认为是目前计算大变位水平承载高桩的较好的实用方法。砂土中单桩的Ｐ－Ｙ曲线可采用美国ＡＰＩ规范１７版法。群桩的计算，在多数情况下可从群桩中取出一排桩进行计算。将排桩中的前桩看作单桩，前桩以外的所有桩都按“后桩”处理。一旦前桩的Ｐ－Ｙ曲线确定，就可用作者提出的式（８）由前桩的Ｐ－Ｙ曲线将土反力修正后得“后桩”的Ｐ－Ｙ曲线，按单桩进行后续计算，进而计算群桩承载力。这种计算方法可供有关桩基工程设计时参考使用。
There are numerous methods for calculating the bearing capacity of a high pile subjected to a horizontal load. Those meth- ods are not suitably to calculate the large displacement of a high pile under a horizontal load. The behavior of a pile can be re- flected completely by the P-Y curve. A P-Y curve method can be considered as a better one practical method. For single pile in sand, we can employ the P-Y curve that was carried in the American API code (version 17). In a one row pile group, the displacement of a front pile is close to that of a single pile. Other piles in the one row pile group can be regarded as a back pile. A modified P-Y curve for a back pile in pile group is put forward (see formula (8) in this paper). So, a back pile is calculated as same as a single pile. This procedure may be a reference for designers.
出处
《土木工程学报》
EI
CSCD
北大核心
2000年第4期74-79,共6页
China Civil Engineering Journal
