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针对应力比结构性参数存在的问题,建立了结构性黄土初始结构性参数与含水率、围压之间的关系,在变形过程中建立了更为合理的结构性参数与广义剪应变的关系,并将其引入结构性黄土的强度理论中。在此基础上,通过数值计算对边坡结构性参数分布的变化规律及潜在滑动面的确定进行了评价。研究结果表明:建立的初始结构性参数可以反映黄土边坡的结构性参数初始分布场;结构性参数变化的上限是初始结构性参数,下限为结构性完全丧失后的结构性参数,且其值等于1.0;在结构性黄土边坡稳定性分析中,通过结构性参数的分布规律可在一定程度上确定边坡的潜在滑动面,但仅适用于塑性区域呈明显的带状集中分布的情况。
Aiming at the existing problems of the structural parameters of stress ratio, the relationship between the initial structural parameters of structural loess and water content and confining pressure was established. The relationship between the more reasonable structural parameters and the generalized shear strain was established in the deformation process. And introduce it into the strength theory of structural loess. On this basis, the variation regularity of structural parameters of slope and the determination of potential sliding surface are evaluated by numerical calculation. The results show that the initial structural parameters can reflect the initial distribution of structural parameters of the loess slope. The upper limit of the structural parameter variation is the initial structural parameter, and the lower limit is the structural parameter after structural loss completely, and its value Is equal to 1.0. In the stability analysis of structural loess slope, the potential sliding surface of the slope can be determined to a certain extent by the distribution of structural parameters, but it is only suitable for the case that the plastic zone is obviously ribbon-shaped distribution.