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针对淤土地基灌注桩水平荷载作用下桩体受力特性,通过现场水平承载力破坏性试验,对不同桩长、桩径和桩基上部土体的两个试验区进行对比研究,由现场实测得到的桩体桩身轴力与弯矩分布情况,得知桩径增加和桩基上部土体改善有助于提高水平承载力,但桩径的增加对水平承载力的提高效果更为显著;利用ABAQUS数值计算对水平承载特性进行研究,并与现场试验结果进行对比分析,对比表明:现场实测数据和数值模拟的拟合程度较好,说明有限元在桩基水平承载能力研究方面具有合理性,为进一步利用有限元研究桩体水平承载力提供了一定的理论基础。
According to the stress characteristics of the pile under the horizontal load of silt subsoil, the two test areas with different pile lengths, pile diameters and soil above the pile foundation are compared by field destructive tests of horizontal bearing capacity. It is found that the increase of pile diameter and the improvement of soil mass on the top of the pile will help to improve the horizontal bearing capacity. However, the increase of pile diameter has a more significant effect on the horizontal bearing capacity. The ABAQUS numerical calculation is used to study the horizontal bearing characteristics and compared with the field test results. The comparison shows that the measured data and the numerical simulation are fit well, which shows that the finite element method is reasonable in studying the horizontal bearing capacity of the pile foundation , Which provides a theoretical basis for further research on the horizontal bearing capacity of the pile using finite element method.