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通过大型动力三轴试验,研究了循环荷载作用下堆石料的颗粒破碎特性及其影响因素,首次根据堆石颗粒在混合料中所发挥的作用以及堆石料发生颗粒破碎后不同粒径范围颗粒含量的变化量,将堆石料的颗粒破碎形式划分为棱角破碎和骨架破碎。进而,基于堆石料发生颗粒破碎前后级配的分形维数定义了堆石料的颗粒破碎率,建立了循环荷载作用下堆石料颗粒破碎率与其动剪应变及体积应变关系表达式。
Through the large-scale dynamic triaxial test, the particle crushing properties of rockfill materials under cyclic loading and their influencing factors were studied. According to the role of rockfill particles in the mixture and the particle content in different particle size range after crushing of rockfill materials Of the amount of change, the rockfill particles broken form is divided into angular crushing and skeleton crushing. Furthermore, the fractal dimension of rockfill materials is defined based on the fractal dimension of the gradation before and after the crushing of rockfill materials, and the relation between the crushing rate of rockfill materials and its dynamic shear strain and volume strain under cyclic loading is established.