The static allowable stress field of foundation under strip foundation is constructed by means of stress columns, and the calculation method of the lower bound foundation bearing capacity based on the two-parameter parabolic Mohr yield criterion is proposed. Moreover, the influence of the amount of stress columns and material mechanical parameters on the lower bound bearing capacity is analyzed. The results show that a better solution can be obtained by optimizing the static allowable stress field. However, the improvement of lower bound solution might be inefficient if the stress column amount is large enough. The stresses of the superimposition area show a reduction with the improvement of stress field; on the other hand, the superposed stresses are enhanced ever faster as the involved stress column increases. The tensile-compressive strength ratio has a moderate effect on the lower bound solution. Finally, the reliability of the proposed method is verified by some rock foundation loading tests.

中文翻译：

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基于抛物线莫尔破坏准则的带状基础下地基承载力下界解

利用应力柱构造了带状地基下地基的静态容许应力场，提出了基于两参数抛物线莫尔屈服准则的地基下界承载力计算方法。此外，分析了应力柱的数量和材料力学参数对下限承载力的影响。结果表明，通过优化静态许用应力场可以获得更好的解决方案。但是，如果应力柱数量足够大，则下界解的改进可能效率不高。叠合区域的应力随着应力场的改善而减小。另一方面，随着所涉及的应力柱的增加，叠加应力的增加速度越来越快。拉伸压缩强度比对下限溶液具有适度的影响。最后，通过岩石基础载荷试验验证了该方法的可靠性。