论文部分内容阅读
通过有限元数值模拟研究了季节冻土区冻土层对黄土地基水平受荷桩承载力的影响规律。研究表明:单桩水平承载力受冻土层厚度和桩径影响显著,随冻土层厚度的增大而增大,但增加的幅度减小;随桩径的增大而近似线性地增加,且冻土层厚度越大,随桩径增大的幅度越大。提出了基于变形控制的不同冻土层厚度、不同桩径水平受荷桩承载力特征值修正系数。基于计算结果进一步对修正系数进行拟合,得到了季节冻土区黄土地基水平受荷桩承载力特征值修正系数表达式,可供冬季检测单桩水平承载力参考。
The influence of permafrost on the bearing capacity of horizontal piles under loess foundation was studied by finite element numerical simulation. The results show that the horizontal bearing capacity of single pile is significantly affected by the thickness and pile diameter of frozen soil layer, and increases with the increase of the thickness of frozen soil layer. However, the increase amplitude decreases with the increase of pile diameter, And the greater the thickness of the frozen soil layer, with the pile diameter increases the greater the magnitude. Based on the deformation control, the eigenvalue correction factors of the bearing capacity of the piles under different thickness of frozen soil and different pile diameters are proposed. Based on the calculation results, the correction coefficients were further fitted to obtain the expression of eigenvalue correction factors for bearing capacity of horizontal piles under seasonal frozen ground, which can be used to refer to the horizontal bearing capacity of piles in winter.