Effect of Particle Shape and Confining Pressure on Breakage and Deformation of Artificial Rockfill

被引：14
|
作者：
Yang, Gui [1 ]
Yan, Xing [1 ]
Nimbalkar, Sanjay [2 ]
Xu, Jianbao [1 ]
机构：
[1] Hohai Univ, Coll Civil & Transportat Engn, Key Lab, Minist Educ Geomech & Embankment Engn, Nanjing 210098, Jiangsu, Peoples R China
[2] Univ Technol Sydney, Fac Engn & Informat Technol, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia
来源：
INTERNATIONAL JOURNAL OF GEOSYNTHETICS AND GROUND ENGINEERING | 2019年 / 5卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Particle shape; Artificial rockfill; Particle breakage; Secant modulus; Triaxial shear test; SHEAR-STRENGTH; TRIAXIAL COMPRESSION; BEHAVIOR; SIZE; ASSEMBLIES; ROUNDNESS; MODEL;
D O I：
10.1007/s40891-019-0164-z
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
The rockfill exhibits a substantial amount of particle breakage when subjected to higher range of stresses. The deformations of rockfill under such excessive stresses often lead to failure and cannot be ignored. The degree of particle breakage is related to the type of the material as well as the particle shape. Based on this, artificially simulated rockfill materials with three different aggregate shapes (prism, cube, and cylinder) were prepared by cement paste-casting method. Through a series of medium-sized triaxial shear tests, the effects of confining pressure and particle shape on the fracture characteristics of the artificial rockfill and its secant modulus were investigated. The useful relationships between particle sphericity and roundness with deformation modulus and particle breakage rate were proposed.
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页数：10
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