论文部分内容阅读
利用滑移线法计算了粗糙条形基础极限承载力,计算时考虑了土的黏聚力c、内摩擦角φ和土体重度g的共同作用,避免了对破裂面形状的人为假定,并满足所有边界条件。将数值计算结果与其他学者的解答进行了对比,证明了解答的准确性。分析了地基承载力系数N_γ的影响因素,证实了N_γ除了与地基摩擦角φ有关外,还与超载比l有关。绘制了不同j值下N_γ随l的关系曲线,给出了N_γ的拟合公式,计算结果表明拟合公式的误差在±4%以内。最后对传统叠加方法计算承载力与精确解之间的误差进行了计算,总结了不同j值时误差e随l的变化规律,发现叠加计算结果比精确解小,且最大误差出现在l介于0.1~1之间。
The slip-line method is used to calculate the ultimate bearing capacity of the rough strip foundation. The cohesion c, the internal friction angle φ and the soil mass g are taken into account in the calculation, which avoids the artificial assumption of the shape of the fracture surface. Meet all the boundary conditions. Comparing the numerical results with those of other scholars, we prove the accuracy of the solution. The influencing factors of the bearing capacity coefficient N_γ are analyzed. It is proved that N_γ is related to the overload ratio l in addition to the foundation friction angle φ. The relationship curve of N_γ with l under different values of j is plotted, and the fitting formula of N_γ is given. The calculation results show that the error of the fitting formula is within ± 4%. Finally, the error between the calculation of bearing capacity and the exact solution of the traditional superposition method is calculated. The variation law of the error e with the different value of j is summarized. It is found that the superposition calculation result is smaller than the exact solution and the maximum error is between 1 0.1 ~ 1 between.