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以路基改良土作为研究对象,研究其在冻融受载耦合条件下的损伤演化规律.土体在冻融循环条件下的受载损伤,就可以等效为土体在2种加载下的损伤.以寒区路基工程为背景,考虑冻融与荷载的耦合作用,通过室内试验,研究了冻融循环作用下路基改良填料的强度和变形特性,在此基础上探索改良土路基内部土体发生在细观层次上的损伤形态和演化过程,建立冻融受载损伤模型.
Taking the subsoil of improved soil as the research object, the damage evolution of the subsoil under freezing-thawing coupled loading was studied, and the damage of the soil under the freeze-thaw cycle was equivalent to that of the soil under the two loadings Taking the roadbed engineering in the cold area as the background, considering the coupling effect of freezing and thawing and the load, the strength and deformation characteristics of the subgrade filler under the action of freeze-thaw cycles were studied through indoor experiments. Based on this, At the meso-level of damage morphology and evolution, a freeze-thaw injury model was established.