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采用多块体上限方法,通过自编程序分析研究了双层黏土地基极限承载力问题。计算了不同参数h0/B以及cu1/cu2时的地基承载力系数Nc’,并与其它文献的计算结果进行了对比,深入探讨了双层黏土地基极限承载力系数Nc’受上述参数影响的规律。基于多块体上限法求解所获得的双层黏土地基破坏面信息,研究了不同参数h0/B及cu1/cu2下双层地基破坏面的变化规律,从而给出了地基承载力系数Nc’随上述参数变化的内在原因。
The multi-block upper bound method is used to analyze the ultimate bearing capacity of double-layered clay foundation by self-programmed program. The coefficient of bearing capacity Nc ’of foundation with different parameters h0 / B and cu1 / cu2 is calculated and compared with the results of other literatures. The law of ultimate bearing capacity coefficient Nc’ of double-layered clay foundation is affected by the above parameters . Based on the multi-block upper bound method, the failure surface information of double-layered clay foundations was obtained. The variation rules of the failure surface of double-layered foundation with different parameters h0 / B and cu1 / cu2 were studied. The above reasons for the change of parameters.