桩周软弱土层下限深度分析

Analysis of Lower Limit Depth of Soft Soil Layer around Pile

介绍了桩侧负摩阻力产生机理及传统计算方法。在进行基桩设计时,由于国家相关规范对桩周软弱土层下限深度未作出明确定义,尤其对于存在多层软弱土层的情况,其下限深度的取值存在较大争议。结合具体工程的变形监测数据,对存在多层软弱土层的桩周软弱土层下限深度的取值进行了分析,并给出了相应的取值建议。通过与实际监测结果进行对比,该取值方法计算结果较为合理。

The mechanism of negative skin friction on pile side and the traditional calculation method were introduced, in the design of pile foundation, due to the relevant national norms on the lower limit of the soft soil layer of the pile was not clearly defined, especially for the existence of multi-layer soft soil, there was a big controversy about the value of the lower limit depth based on the deformation monitoring data. In this paper, In the presence of multilayer soft soil layers, the value of the lower limit depth of soft soil layer around the pile was analyzed, and the corresponding suggestions were given. Compared with the actual monitoring results, the calculation results of this method were reasonable