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针对工程上涉及的大量缩孔现象,从土的基本工程性质出发,考虑土的应变软化特性和不相适应流动法则,推导了建立在弹性-软化-塑性模型基础上的柱形孔和球形孔收缩的弹性区、软化区和塑性区的解析解,给出了卸载压力与塑性区半径和软化区半径之间的关系。研究了反映软化特性的参数对计算结果的影响,并与理想弹塑性材料进行比较,克服了在弹塑性交界处p/p_0与r/r_0出现突然转折的缺点。
Aiming at a large number of shrinkage cavities involved in engineering, starting from the basic engineering properties of soil, taking into account the strain-softening behavior of soil and the incompatible flow laws, cylindrical and spherical holes based on the elastic-softening-plastic model The relation between the unloading pressure and the radius of the plastic zone and the radius of the softened zone is given by the analytical solutions of the contracted elastic, softening and plastic zones. The influence of softening characteristic parameters on the calculation results was studied and compared with the ideal elastoplastic materials to overcome the shortcomings of the sudden transition of p / p_0 and r / r_0 at the elastic-plastic boundary.