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在工程实践中,现行的地基容许承载力的确定方法是根据变形或强度二个独立的标准而建立的.在计算地基变形时,特别是在容许值[S]较大的情况下,基底压力可能已大于临塑荷载p_0,这就使得计算背离了所依据的线弹假定.对于按强度计算的临界荷载p1/4,更是存在着人们所共知的力学状态上的矛盾.因之,应用非线性本构关系,按变形或强度标准来评价地基的力学行为就有着明显的优越性.本文就是以模型试验为依据,来揭示此类地基容许承载力的特点.
In engineering practice, the current method of determining the allowable bearing capacity of foundations is based on two independent criteria, deformation or strength. In the calculation of the deformation of the foundation, especially in the case of large allowable values [S], the substrate pressure May have been greater than the plastic load p_0, which makes the calculation deviate from the underlying linear bomb assumptions.For the critical load calculated by the strength of p1 / 4, there is a contradiction between the well-known mechanical state.So, Application of nonlinear constitutive relations, according to the deformation or strength criteria to evaluate the mechanical behavior of the foundation has obvious advantages.This paper is based on model tests to reveal the characteristics of such foundation allowable bearing capacity.