多孔饱和介质的二元扰动分析

Analysis of Duality Disturbance for Porous Saturated Media

目的推广Terzaghi有效应力原理,建立多孔饱和材料的二元扰动模型.方法基于二元扰动理论(TDD),建立多孔饱和介质的扰动基本方程.通过引入基于孔隙比的扰动函数D,给出骨料之间的接触压应力和流体压应力与接触面积的函数关系.结果在有效应力、中性应力、接触应力、流体应力和表观应力的计算中,考虑了饱和多孔介质在渗流过程中,接触面积、液面高度以及全比重的影响.给出了在排水条件下,各种应力的定量计算的公式,在此基础上,以典型算例验证了多孔饱和介质的二元扰动理论模型.结论多孔饱和介质的二元扰动模型加深了微观机理的理解,精化了相关问题的分析,具有更广泛的实用性.

Model of duality disturbance for porous saturated media is established using theory of duality disturbance（TDD）.The basic equation of duality disturbance is given and the disturbance is set up in terms of void ratio.The relations of contact stress among contact groups and neutral stress with contact area are presented.The effects of contract area,fluid height of fluid surface,total weight ratio on effective stress,neutral stress,contact stress,fluid stress and observed stress are considered.A typical seepage problem of porous saturated media is analyzed by the model of duality disturbance.It can be seen that model of duality disturbance for porous saturated media is of wider availability,and helpful to understand and analyze micro-mechanism of observed behavior for porous saturated media.