摘要
为探究筑坝堆石料颗粒破碎现象,选取不同粗粒含量和含水量的堆石料作为研究对象,开展室内击实试验,分析土体的压实特性、颗粒破碎特性及分形特征,并揭示其力学响应机理。试验结果表明:随含水量的增加,堆石料的干密度先增大后减小。而最大干密度和最优含水量分别与粗粒含量呈现正相关和负相关。堆石料中出现明显的颗粒破碎现象,随粗粒含量和含水量的增加其颗粒破碎率随之增大。粗粒含量与含水量分别与分形维数成反比和正比关系,相较于含水量,粗粒含量对分形维数的影响更显著。
To explore the phenomenon of particle breakage of rockfill materials for dam construction,rockfill materials with different coarse grain content and water content are selected as the research object,and indoor compaction tests are carried out to analyze the compaction characteristics,particle breakage characteristics and fractal characteristics of soil,and reveal its mechanical response mechanism.The test results are as follows.The moisture content increases,the dry density of rockfill is firstly increased and then decreased.Maximum dry density and optimal water content are positively correlate and negatively correlate with the coarse grain content,respectively.There is obvious particle breakage in rockfill,and the particle breakage rate increases with the increase of coarse particle content and water content.There is a certain internal relationship between fractal dimension and particle breakage rate.The coarse grain content and water content are inversely and proportional to the fractal dimension,respectively.Compared with the water content,the coarse grain content has a more significant effect on the fractal dimension.
作者
李东
李晨晨
沈兴刚
LI Dong;LI Chenchen;SHEN Xinggang(Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650093,China;College of Architecture and Civil Engineering,Kunming University,Kunming,Yunnan 650214,China)
出处
《水利与建筑工程学报》
2024年第1期47-53,共7页
Journal of Water Resources and Architectural Engineering
基金
云南省地方本科高校基础研究联合专项(202101BA070001-137,202301BA070001-012)
昆明学院人才引进项目(XJ20220015)。
关键词
筑坝堆石料
粗粒含量
压实特性
颗粒破碎
粒度分形
dam rockfill materials
coarse grain content
compaction characteristics
particle breakage
fractal characteristics
