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应用土拱理论是计算桩承式路堤中桩体荷载分担比的主要方法。目前土拱的模型多为均质和单一化的几何模型,缺少对土拱真实形状和内部性状的分析。基于多拱理论模型,将路堤中的土拱视为由无穷多个连续拱组成,通过几何分析,并引入静力平衡条件,得到了桩承式路堤中不同部位土体竖向应力的改进的多拱理论解析解,以及沿深度的应力分布规律。对桩承式路堤中土体应力进行了分析,并和模型试验结果进行了对比,计算结果和实测结果具有很好的一致性。研究表明,加强对土拱应力分布规律的研究有助于更好地理解和研究桩承式路堤的工作性状。
The application of soil arching theory is the main method to calculate the load-sharing ratio of pile in piled embankment. At present, the models of soil arching are mostly homogeneous and simple geometric models, which lacks the analysis of the real shape and internal traits of soil arches. Based on the multi-arch theory model, the soil arches in the embankment are regarded as an infinite number of continuous arches. Through geometric analysis and the introduction of static equilibrium conditions, the vertical stress in different parts of the pile-supported embankment is improved Multi-arch theory analytical solution, and along the depth of the stress distribution. The stress of soil in pile-supported embankment is analyzed and compared with the model test results. The calculated results are in good agreement with the measured results. The research shows that strengthening the research on the law of stress distribution of soil arches helps to better understand and study the working characteristics of piled embankments.