论文部分内容阅读
在托板桩复合地基承载力分析中,托板桩桩身中性点位置是计算桩侧负摩阻力和下拉荷载的关键。采用有限元分析了托板尺寸、桩间距、填土厚度和桩端土层刚度等对中性点位置的影响,研究表明,托板桩桩身中性点深度不同于常规桩,中性点位置受托板尺寸和桩端土的刚度的影响显著,而受填土高度和桩间距的影响相对较小。通过对一具体工程进行数值模拟,计算结果(中性点的深度为0.33L)与实测值(中性点的深度为0.36L)相符合。
In the analysis of bearing capacity of composite foundation of pile pallar pile, the neutral point position of pallet pile body is the key to calculate the negative frictional resistance and the pull-down load of piles. The influence of the size of pallets, the spacing of piles, the thickness of filling soil and the stiffness of soil layer on the neutral point was analyzed by finite element method. The results show that the neutral point depth of piled piles is different from those of conventional piles and neutral points The location of pallet size and the stiffness of pile tip soil are significant, while the influence of fill height and pile spacing is relatively small. Through numerical simulation of a specific project, the calculation result (the depth of the neutral point is 0.33L) is consistent with the measured value (the depth of the neutral point is 0.36L).