桶形基础极限承载力特性研究

通过有限元计算，分析了不同长径比下横向和竖向承载力、载荷位移曲线以及耦合载荷作用下的极限承载力特性，并与实验结果进行了对照。结果表明：当竖向压力小于某临界值时，基础的横向极限承载力随着竖向压力的增加而增加；但是当竖向压力增大到超过该临界值以后，横向极限承载力反而会随竖向压力的增大而降低。随着长径比的增加，基础承载力，特别是横向承载力有比较明显的提高。

THE CHARACTERISTICS OF THE BEARING CAPACITY OF BUCKET FOUNDATION

The finite element software(ABAQUS) was used to simulate the bearing capacity of the bucket foundations with different height-to-diameter ratios. The characteristics of the bearing capacity of the foundations under the vertical loading,the horizontal loading and the coupling loadings were analyzed. The numerical results were compared with that of experiments. It is shown that under a critical vertical loading,the horizontal bearing capacity increases with the increase of the vertical loading,but decreases with the increase of the vertical loading when the latter is larger than the critical loading. The bearing capacity,especially the horizontal bearing capacity, increase obviously with the increase of the height-to-diameter.