【作者】 常彬； 沈晏仟； 罗昔联； 顾兆林；

【Author】 Chang Bin;Shen Yanqian;Luo Xilian;Gu Zhaolin;School of Human Settlements and Civil Engineering;

【机构】 西安交通大学人居环境与建筑工程学院；

【摘要】 土体在干燥过程中产生干缩裂缝的现象十分常见,主要是土体内部张拉应力作用造成的。土体的干裂破坏了土体结构连续性,造成了其性质的改变,对土质材料或与其相关的构筑物强度及安全性有极大的影响。本文以土遗址干裂破坏行为为研究对象,以土体干燥收缩理论为基础指导,通过室内实验及数值模拟的方法,研究与分析黏粒含量及干密度对土体干裂的影响,通过离散元软件建立数值模型,为土体干裂破坏的预测与演化机理研究提供了新的思路。更多还原

【Abstract】 In the process of drying, the dry shrinkage cracks are mainly caused by the matric suction generated by the void structure in the soil. When the tensile stress inside the soil exceeds the tensile strength of the soil, the soil will crack. The dry crack of soil destroys the continuity of soil structure and changes its properties, which has great influence on the strength and safety of soil materials or related structures. Based on dry soil site damage as the research object, based on the theory of soil drying shrinkage guidance, through the indoor experiment and numerical simulation methods, the clay content and dry density of soil research and analyzed the influence of desiccation, and numerical model was established by discrete element software, for the prediction of soil desiccation destruction and evolution mechanism of the research provides a new train of thought.更多还原