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本文是根据国内港工中79根试桩资料,统计分析的单桩压缩系数的经验公式;介绍为什么取桩顶定值沉降量与极限荷载建立关系的理由.提出我国主要软基建港地区参数B取值的参考范围.对B值的分析采用均值μ的区间估计,既适应目前的设计状况,也为以后高桩结构按可靠度分析做了边界参数值的准备.指出当桩的极限荷载R_1大于350~T时选取B时要折减的原因.对循环荷载和复压试桩对B值的影响进行了探讨.可供设计和有关规范修改时参考.
This article is an empirical formula of the compression coefficient of single pile according to the data of 79 test piles in domestic port engineering. It explains the reason why setting the settlement value of pile top and the ultimate load establish the relationship. Reference range of values. The analysis of B values adopts the interval estimation of the mean μ, which not only adapts to the current design conditions, but also prepares the boundary parameter values for the reliability analysis of the high-piles structure. The ultimate load of the pile is indicated when R_1 The reason for the reduction when B is selected to be greater than 350~T is discussed. The influence of cyclic load and recompression test piles on the B value is discussed. For reference when designing and modifying the relevant specifications.