粗粒掺量对土石混合料强度特性的影响  

Effects of Coarse Fraction Content and Grain Size on Strength Properties of Soil and Rock Mixtures

作　　者：闫云明 王雯璐 Yan Yunming;Wang Wenlu(College of Resource & Environment,Henan Universitute of Engineering,Zhengzhou 451191,China)

机构地区：[1]河南工程学院资源与环境学院,河南郑州451191

出　　处：《科技通报》2017年第9期142-145,共4页Bulletin of Science and Technology

基　　金：河南省教育厅攻关项目(2011A170001);国家重点基础研究发展计划"973"项目(2010CB731503)

摘　　要：为探讨粗粒含量对土石混合料抗剪强度的影响,对粗粒含量为0%、30%、50%、70%、100%共5组土石混合料试样进行饱和固结排水三轴压缩试验。结果表明,土石混合料的骨架作用明显,抗剪强度受粗细颗粒的共同作用影响;土石混合料抗剪强度随粗粒含量增大先增大后减小,粗粒含量为70%左右时抗剪强度最大;在极小的压缩变形条件下,土体凝聚分量就能达到最大值,而摩擦分量的最大值则需要在很大的应变下才能发挥出来。To study the infuence of contents of coarse soil particles on the strength properties of soil androck mixtures.Five sets of triaxial compression tests were conducted with coarse soil particle contents of0%,30%,50%,70%,100%.Test results show that the framework action is prominent and the shearstrength is mostly influenced by the actions of coarse soil particle and fine particle on earth and rockmixtures;with the increase of the contents of coarse soil particle,the shear strength would first increaseand then decrease,and the shear strength would be maximum when the content of coarse soil particle is70%;compared to the set with relatively smaller coarse soil particle sizes the shear strength is greaterbut not obvious in the set with relatively larger coarse soil particle sizes.Soil cohesion component canreach the maximum in the condition of the minimal compression deformation,while,great strain isneeded to reach the maximum of the maximum friction component.

关 键 词：土石混合料 粗粒含量 应力路径 抗剪强度 

分 类 号：TU411[建筑科学—岩土工程]