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应用多块体上限方法探讨了考虑黏土黏聚力强度非均质及各向异性特点时的地基承载力计算问题。分析了考虑黏聚力强度非均质及各向异性时多块体上限方法的计算实现问题,为检验多块体上限方法的计算结果,将多块体上限方法的计算结果做了对比,从而验证了方法的优越性与可靠性;应用多块体上限方法计算了较广泛黏聚力强度非均质及各向异性参数下的地基承载力系数Nc′,给出相应的的计算曲线,分析研究了Nc′随非均质及各向异性参数变化的规律;最后分析探讨了黏聚力强度非均质对地基破坏面的影响情况,从而揭示了非均质对Nc′影响的内在原因。
The multi-block upper bound method is used to investigate the calculation of the bearing capacity of foundations considering the heterogeneity and anisotropy of cohesive strength of clay. The calculation and implementation of multi-block upper bound method considering cohesion strength heterogeneity and anisotropy are analyzed. In order to verify the calculation results of multi-block upper bound method, the calculation results of multi-block upper bound method are compared to The superiority and reliability of the method are verified. The coefficient of bearing capacity Nc ’under the condition of wider cohesion strength heterogeneity and anisotropy is calculated by using multi-block upper bound method, and the corresponding calculation curve is given. The variation of Nc ’with heterogeneous and anisotropic parameters was studied. Finally, the influence of cohesion strength heterogeneity on the failure surface of the foundation was analyzed, and the inherent causes of the influence of heterogeneity on Nc’ were revealed.