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决定饱和岩土材料变形的有效应力以及孔压系数B的表达式主要有2种不同的形式,为辨析其合理性,分析了不排水条件下,孔压增量和净围压增量作用下固相与骨架的体积压缩系数之间的关系,以及分别由孔压增量和净围压增量作用引起的液相、固相和骨架的体积增量,指出了和B的两种形式的表达式在推求过程中各自存在的问题,并通过不排水和排水条件下的变形等效关系,建立了新的有效应力和孔压系数B的表达式。
The effective stress that determines the deformation of saturated geomaterials and the expression of pore pressure coefficient B mainly have two different forms. To analyze its rationality, under the condition of undrained condition, the effect of pore pressure increment and net confining pressure increment The relationship between the solid phase and the volumetric compression factor of the framework, and the volumetric increase of the liquid phase, the solid phase and the skeleton caused by pore pressure increment and net confining pressure increment, respectively, indicate that both forms The expressions in the process of deducing their own problems, and through the equivalent relationship between deformation under undrained and drained conditions, the establishment of a new effective stress and pore pressure coefficient B expression.