基于改进p-y曲线法的单桩水平受荷计算

A calculation of horizontal loaded single pile based on improved p-y curve method

在Winkler地基梁模型的基础上,基于改进p-y曲线法提出了一种在复杂水平荷载作用下求解部分埋置水平受荷单桩在软黏土中弯矩和位移的计算方法。该方法考虑了土体的塑性、土抗力与水平位移之间的非线性,且采用差分法进行求解并编写相应的Matlab程序,便于给出精确的理论解答。通过构制不同的地层结构,对比桩身位移、弯矩的变化,获得了最佳的地层结构,结果表明地表表层土强化处理很重要。最后将计算结果与现场试验数据进行对比,吻合程度较好。说明所提方法可在达到工程精度要求的基础上,减小所需土体参数的获取难度,降低工程成本。

Based on the Winkler foundation beam model and the improved p-y curve method,this paper presents a method to calculate the bending moment and displacement of a partially embedded single pile under complex lateral loading.In this method,the nonlinearity between the soil plasticity,soil resistance and the horizontal displacement is taken into account,the finite difference method for solving this problem is used,and the corresponding Matlab program is given.And then an accurate theoretical solution can be carried out easily by the developed method.In order to obtain the best stratigraphic texture from the different stratigraphic textures constructed,the displacement and the bending moment of the pile are compared.The results show that the treatment of surface soil is very important.The validity of the proposed method is demonstrated through the comparison between the calculation results of the proposed method and the field experimental results.The use of the developed method can meet the engineering accuracy requirements,and reduce the difficulty of soil parameters acquisition and the engineering cost at the same time.