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本文论述了饱和尾矿砂在不排水静荷载作用下的液化特性,研究发现:影响静力液化特性的因素主要取决于砂样的孔隙比,但也受固结应力条件,特别是潜在破裂面上的初始剪应力的影响;触发静力液化的条件与发生静力液化后的稳态条件,都与砂样的孔隙比存在单一关系。文中提出根据触发条件确定发生静力液化临界孔隙比的方法,并建议采用静力液化安全指数评价静力液化后果。
This paper discusses the liquefaction characteristics of saturated tailings sand under non-drainage static loads. It was found that the factors affecting the static liquefaction characteristics mainly depend on the porosity ratio of sand samples, but they are also affected by the conditions of consolidation stress, especially on the potential rupture surfaces. The influence of the initial shear stress; the triggering static liquefaction conditions and the steady-state conditions after static liquefaction have a single relationship with the void ratio of the sand sample. This paper proposes a method to determine the critical void ratio of static liquefaction based on the triggering conditions, and proposes to use the static liquefaction safety index to evaluate the effect of static liquefaction.