斜坡上单桩的统一极限抗力分布模式研究?

假定土体为理想弹塑性体,基于统一极限抗力分布模式,利用最小势能原理,计算不同坡角时的桩前土体极限抗力,得到斜坡上单桩水平承载力的弹塑性解,并编制了相应的MATLAB计算程序。通过室内模型试验,验证了基于统一极限抗力分布模式计算得到的斜坡上单桩的水平承载力和桩身弯矩是合理的。结果表明:单桩的水平承载力随斜坡坡角的增加而降低,坡角为45°时桩顶的水平位移是坡角为15°时的1.45倍,斜坡坡角的大小对单桩的水平承载特性有较大的影响。

Study on the Unified Limit Force Profile of Single Pile in Sloping Ground

Based on the unified limit resistance distribution mode, the ultimate resistance of a single pile under different slope angles was calculated by using the minimum potential energy principle. The elastoplastic solution for the horizontal bearing capacity of a single pile in the slope was obtained by compiled MATLAB program. In order to verify the calculated horizontal bearing capacity and pile bending moment of single pile in the slope, a model test was carried out. The results show that the horizontal bearing capacity of a single pile decreases with the increase of the slope angle. The horizontal displacement of the pile in a 45° slope is 1.45 times that in a 15° slope. The variation of slope angle has a great influence on the horizontal bearing characteristics of the single pile.