高桩码头基桩的轴向刚度

根据数理统计的方法确定桩土的轴向刚度与桩土极限阻力之间的比例关系,基桩的轴向刚度采用桩土轴向一维有限元法计算。该方法能反映桩身轴向刚度、桩入土长度、桩侧各分层土以及桩尖支承土对桩轴向刚度的影响,能适用于各类桩型和不同入土长度的桩基情况,并适合与m法配套用于桩基采用有限元计算。统计表明:该方法计算的桩轴向刚度比规范法更接近实测结果。当无桩轴向刚度试桩资料时,可为高桩码头结构计算时确定桩轴向刚度提供参考。

Piled wharf foundation pile's axial rigidity

According to the statistical method,the relationship between pile-soil axial rigidity to the pile-soil ultimate resistance is ascertained,so that the pile′s axial rigidity can be calculated by the one-dimensional finite element method.By the method,the pile′s axial rigidity,the buried depth of pile,and the influence of all soil layers along the pile and pile tip′s supporting soil on the axial rigidity of pile can be reflected.So it is applicable to pile foundation of various pile kinds and different buried depths and also supports the m method applied to finite element calculation.Statistics shows that the result concerning the axial rigidity of pile from this method is closer to the measured data comparing to the method stipulated in the code.It may serve as references for determining the axial rigidity when there is no pile testing data.