摘要
红层泥岩填料中泥岩碎块石的含量直接影响压实后填筑体的流变、渗透、强度以及地基变形特性。通过配置不同含水率、不同粗细比的泥岩试样,开展红层泥岩击实后粒径的分布情况及其破碎率和分形维数的研究,探讨分形理论在该种岩土体中的规律和特性。结果表明,泥岩颗粒破碎后的粒径分布具有典型分形特征,分形维数区间分布在2.418~2.529。随着含水率的增加,红层泥岩的破碎率和分形维数均增加。当P5初始含量较大时,含水率对分形维数的增长影响较大,但初始粗颗粒的增多减缓了分形维数伴随含水率增加而上升的幅度。破碎率和分形维数均是随着含水率的增加而增大,且与P5初始含量成反比关系,两者具有一定的相关性,满足高斯公式的正态分布关系。
The content of breakstone in red-bed mudstone has a direct influence on the rheological property, perme- ability, strength and subgrade deformation of the fillings after compaction. To investigate the fractal features of red- bed mudstone, we analyzed the particle size distribution, crushing rate, and fraetal dimension of red-bed mudstone specimens of different moisture contents and coarse grain to fine grain ratios after compaction test. Results reveal that the particle size distribution of crushed mudstone is of typical fractal features, with the fractal dimension ran- ging between 2.418 and 2.529. With the increase of moisture content, the rate of crushing and the fractal dimension both increase correspondingly. When the initial content of P5 is relatively large, moisture content has a big influence on the growth of fraetal dimension, but with the increase of initial coarse grain, the growth of fractal dimension slows down. Therefore we conclude that the rate of crushing and the fractal dimension have some correlation follow- ing the Gaussian normal distribution. They both increase with the increase of moisture content, and are in negative relationship with the initial content of P5.
作者
胡云鹏
冯文凯
谢吉尊
孙立军
HU Yun-peng FENG Wen-kai XIE Ji-zun SUN Li-jun(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology, Chengdu 610059, China General Geo-environment Monitoring Station of Sichuan Province, Chengdu 610081 ,China)
出处
《长江科学院院报》
CSCD
北大核心
2017年第3期115-118,125,共5页
Journal of Changjiang River Scientific Research Institute
基金
国家自然科学基金项目(41172278
41572291)
四川省教育厅重点项目(12ZA010)
关键词
红层泥岩
击实试验
颗粒破碎
破碎率
分形特征
正态分布
red-bed mudstone
compaction test
crushing of particles
rate of crushing
fractal features
normal distribution
