桩极限承载力反演方法与精度研究

Research on Inversion Method and Accuracy of Ultimate Bearing Capacity of Piles

基于上海地区典型地貌特征和试桩实测资料,统计黄强法与延伸线法计算出的桩侧摩阻力及端桩比的分布情况,并与试桩实测值进行比较,从而选择按照黄强法打五折计算桩侧摩阻力。并反演得出桩极限承载力。分析其相对误差,并与规范值做对比,研究表明按此方法计算出的极限承载力精确性高于现有规范,并较接近实测值,既可保证安全性又可节省工程成本。

Based on the typical geomorphic characteristics of the Shanghai region and the measured data of test piles,the distribution of pile side friction resistance and end pile ratio were calculated by the Huang Qiang method and the extension line method and compared with the measured values of the test pile.Therefore,the pile side friction resistance was calculated according to the Huang Qiang method with a 50%discount.And the ultimate bearing capacity of the pile wasobtainedby inversion.Thenthe relative error ofthecalculatedvalueswasanalyzed and compared with the standard value.Research shows that the accuracy of the ultimate bearing capacity calculated using this method is higher than that of existing standards and closer to the measured value,which can ensure safety and save engineering costs.