斜坡基桩水平极限承载力及影响因素模型试验和数值模拟

发布时间：2018-03-22 19:54

本文选题：水平荷载　切入点：极限承载力　出处：《岩土力学》2014年09期 　论文类型：期刊论文

【摘要】：斜坡上的基桩具有承重和阻滑的双重功能,其受力变形性状远比平地上的情形复杂。采用模型试验和数值模拟相结合的方法研究了其水平承载特性及影响因素。模型试验结果表明:临坡距对基桩的水平承载变形性能有较大影响。同一级荷载下,临坡距较大的桩身水平位移小于临坡距较小的基桩;临坡距较大基桩的临界荷载和极限承载力也大于临坡距小的基桩。数值模拟研究结果表明:基桩水平极限承载力随着斜坡坡比的增大而减小,随着临坡距的增大而增大,与模型试验的结果基本一致。对比分析了斜坡和平地基桩水平承载变形性能的差别,得出了可考虑坡比和临坡距的斜坡基桩水平极限承载力简便计算方法,可为有关规范的修订以及工程设计提供参考。
[Abstract]:The pile on the slope has the dual function of bearing load and preventing slippage. The behavior of stress and deformation is much more complicated than that on flat ground. The horizontal bearing characteristics and influencing factors are studied by combining model test and numerical simulation. The results of model test show that the distance between the adjacent slope and the foundation pile is horizontal bearing. Under the same first order load, the load deformation property is greatly affected. The horizontal displacement of the pile with larger slope distance is smaller than that of the foundation pile with smaller adjacent slope distance. The results of numerical simulation show that the horizontal ultimate bearing capacity of pile decreases with the increase of slope ratio, and increases with the increase of slope distance. The results of the model test are basically consistent with the results of the model test. The difference of the horizontal bearing capacity deformation performance of the slope foundation pile is compared and analyzed, and a simple calculation method for the horizontal ultimate bearing capacity of the slope foundation pile considering slope ratio and the adjacent slope distance is obtained. It can provide reference for the revision of relevant codes and engineering design.
【作者单位】：中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;
【基金】：十二五国家科技支撑计划资助项目(No.2011BAB10B02) 国家自然科学基金项目(No.51079142)
【分类号】：TU473.1

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