中外规范桩基承载力计算对比

Comparison of bearing capacity of pile foundation calculated by Chinese and foreign codes

针对目前海外码头工程桩基承载力的计算因选用不同国家规范而存在一定差异的问题,对中国、美国、欧洲及新西兰规范的土层参数、安全系数的取值进行对比分析,得出各国规范关于桩基承载力计算所适用的地层情况和取值建议。以巴布亚新几内亚莱城港某码头为例,对比各国规范的单桩轴向抗压承载力计算结果。结果表明,当砂土层的标贯击数较小时,对于桩侧阻力的计算选择欧洲规范更加保守;在砂土层中,计算桩端阻力选择新西兰规范最安全。

In view of the problem that currently the bearing capacity of pile foundation calculated by different national codes for overseas terminal projects has certain differences,we carry out a comparative analysis of the values of soil layer parameters and safety factors for Chinese,American,European and New Zealand codes,and obtain the stratum conditions and value recommendations applicable to the calculation of pile foundation bearing capacity in each code.Taking a pier in Lae Port of Papua New Guinea as an example,we compare the calculation results of the axial compressive bearing capacity of a single pile calculated by Chinese and foreign codes.The results show that when the beating counts of standard penetration test of the sand layer are few,and the pile-side resistance calculated by the European code is more conservative.In the sand layer,the pile-end resistance calculated by the New Zealand code is the safest.