摘要
针对近年来堆石料力学特性缩尺效应试验研究成果较少的现状,开展了系列不同级配、不同最大粒径料的大三轴试验。试验料最大颗粒粒径分别为20,40,60 mm,级配采用同一分形维数控制,分别为2.3,2.6和2.7,代表了粗料、中间料和细料,共9组级配。制样标准采用同一相对密实度控制。研究表明:采用同一分形维数级配设计和同一相对密实度制样,堆石料内摩擦角、初始切线模量、体积模量总体上表现出随着颗粒最大粒径增大而增大的规律。但与变形模量相比,抗剪强度缩尺效应较小。
Due to few experimental achievements on scale effect of mechanical properties of rockfill materials,series of triaxial tests are made with different gradations and maximum diameters.The maximum diameters are 20,40 and 60 mm.The 9 groups of gradations are designed with the same fractal dimensions under differecnt maximum diameters.The values of fractal dimensions are 2.3,2.6 and 2.7,respectively,which represents coarse materials,medial materials and fine materials.The sample preparation standard is designed under the same relative density.The results show that the internal friction angles,initial tangent moduli and bulk moduli increase with the increase of the maximum diameters.
作者
武利强
叶飞
林万青
WU Li-qiang;YE Fei;LIN Wan-qing(Zhejiang Institute of Hydraulics and Estuary(Zhejiang Institute of Marine Planning and Design),Hangzhou 310020,China;Zhejiang Provincial Key Laboratory of Hydraulic Disaster Prevention and Mitigation,Hangzhou 310020,China;Zhejiang Water Conservancy and Hydropower Engineering Quality and Safety Management Center,Hangzhou 310012,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2020年第S02期141-145,共5页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金青年基金项目(51609215)
关键词
堆石料
力学特性
分形维数
缩尺效应
制样标准
rockfill material
mechanical property
fractal dimension
scale effect
sample preparation standard
