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中文摘要：
高应力作用下堆石料的颗粒破碎严重,其对堆石体变形的影响不可忽视。采用水泥净浆浇筑不同粒径和不同强度椭球颗粒的方法,探讨了一种人工模拟堆石料的制备方法。通过系列的三轴试验研究了不同破碎率情况下模拟堆石料应力变形和破碎体应变的特性。结果表明,试验中相对破碎率同颗粒强度和围压力的相对大小直接相关。颗粒破碎对堆石体的应力应变特性具有十分重要的影响。堆石体的破碎体应变均为正值,且随轴向应变的增加而增大,两者近似呈双曲线关系。破碎体应变和破碎率之间存在近似的幂函数关系。
英文摘要：
Particle breakage of rockfill materials is serious under high pressure, and its influence on deformation of rockfill cannot be ignored. A method is presented to make artificial rockfill materials with ellipse-shaped particles, which are moulded in various sizes and strengths with cement pastes. Based on a series of triaxial tests, the behaviour of stress-strain and breakage volumetric strain of artificial rockfill materials is analyzed. The test results show that the relative breakage is correlative to the particle strength and confining pressure. The stress-strain behaviour of rockfill is seriously influenced by the particle breakage. The breakage volumetric strain of rockfill is positive and increases with the increase of axial strain in a trend of hyperbolic curve. The relationship between the breakage volumetric strain and the relative breakage can be fitted by a power function.
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