k_0≠1时条形荷载下地基承载力解析计算

The analytical solution of the bearing capacity for foundations under strip load with k_0≠1

在考虑侧向土压力系数k_0≠1的情况下,根据均布荷载作用下弹性应力解和摩尔-库伦破坏准则,推导出条形荷载下地基承载力的精确公式,修正了现有的地基承载力公式的不足之处。解析过程表明当M点处于基础中心点竖直方向以下时,地基中塑性区开展到最大深度。同时,将该公式的计算结果与现有公式的计算结果进行了对比,证明了该公式的精确性。在此基础上,讨论了侧向土压力系数对于地基承载力的影响。

With the consideration of the coefficient of horizontal pressure k_0 ≠1,the precise fomulaof bearing capacity of the foundation under the strip load was deduced based on the elastic stress solution and the Mohr-Coulomb failure criterion under the uniform load.The newly developed formula modified the shortcomings of the existing formulasfor the bearing capacity of the foundation with coefficient of horizontal pressure k_0 ≠1.The analytical process showed that when the M point was below the vertical center of the foundation,the plastic zone of the foundation was extended to the maximum depth.Meanwhile,the calculation results of the formulas were compared with the calculation results of the existing formula,which proved the accuracy of the formula.In addition,the effects of lateral earth pressure coefficient on the bearing capacity of foundation were also discussed.