倾斜荷载下条形基础地基承载力系数研究

Study on bearing capacity factor of strip foundation under inclined loads

地基承载力研究是具有重要意义的工程课题。针对倾斜荷载下条形地基承载力问题,通过极限分析上限定理和扇形条分法,构建了条形基础剪切破坏模式下地基承载力的计算方法,建立了倾斜荷载下条形地基极限承载力、承载力系数的表达式。并研究了荷载倾斜角、内摩擦角、粘聚力等参数对条形地基承载力系数的影响。结果表明:地基承载力系数随着倾斜角度的增大而减小;随着粘聚力,内摩擦角的增大而增大;内摩擦角影响显著,粘聚力影响较小。

Subgrade bearing capacity is an important engineering issue.Aiming at the problem of bearing capacity of strip foundation under inclined loads,and through the analysis of upper limit theorem and fan slices method,this paper established the calculation method of strip footing foundation bearing capacity in shear failure mode,proposed the expression of the limit bearing capacity of strip foundation under inclined loads and the bearing capacity coefficient,and studied the influences of load parameters such as slope angle,angle of internal friction,cohesive force etc.on the bearing capacity coefficient.Results show that the bearing capacity coefficient of foundation decreases with the increase of inclined angles,increases with the addition of the cohesive force and internal friction angle.The effect of internal friction angle is remarkable while the effect of cohesive force is not evident.