摘要
利用室内大型三轴试验,对堆石等粗粒料的颗粒破碎进行了分析。结果表明,颗粒破碎率随围压的增加而增加,呈非线性状态,二者之间的关系可以用双曲线表示。颗粒破碎的增加将导致粗粒料的抗剪强度降低,峰值内摩擦角与颗粒破碎率之间呈幂函数关系,不论颗粒的岩性、强度、大小、形状、级配和初始孔隙比等情况如何,试验资料都落在一个狭窄的区域,如果围压和材料的试验参数已知,则可估计颗粒破碎率。
Particle breakage of coarse aggregates is analyzed based on large-scale triaxial tests. Particle breakage index increases with the increase of confining pressures. The relationship between particle breakage index and confining pressure can be expressed by hyperbolic curves. The increasing of particle breakage will result in decreasing of the strength of coarse aggregates. The relationship between peak internal friction angle and particle breakage index can be presented as power function. Irrespective of the compressive strength of rock, particle size, angularity, gradation and initial void ratio, the experimental data fall within a narrow band. As a result, particle breakage index can be evaluated as long as confining pressures and the coefficients are obtained.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第4期562-566,共5页
Rock and Soil Mechanics
关键词
粗粒料
大型三轴试验
颗粒破碎
抗剪强度
Aggregates
Compressive strength
Geotechnical engineering
Internal friction
Measurements
Particle size analysis
Pressure
Rock mechanics
Rock pressure
Shear strength
