直剪条件下土石混合体力学性能研究  

Study on Soil-rock-mixture Mechanics Performance under the Condition of Direct Shear

作　　者：张宏宇[1] 

机构地区：[1]山西省交通科学研究院,太原市030006

出　　处：《北方交通》2014年第9期83-85,88,共4页Northern Communications

摘　　要：土石混合体在土木工程中广泛应用,基于大型直剪试验系统,研究了土石混合体在大型直剪条件下的力学性质,研究表明:随着垂直压力的增加,土石混合体的峰值剪应力在增加;随着粗颗粒含量的增加,土石混合体的内摩擦角在增加,对于粘聚力而言,当粗颗粒含量大于33%时,二者正相关,否则,负相关。内摩擦角以及粘聚力都随着含水率的增加而降低。Soil-rock-mixture has been applied wildly in civil engineering.Based on large direct shear test system,study has been done on soil-rock-mixture mechanics performance under direct shear condition.And the study shows that：with the increase of vertical pressure,the peak shear stress of soil-rock-mixture also increases;with the increase of coarse grain content,the internal friction angle of soil-rock-mixture also increases.For cohesive force,when the coarse grain content is above 33%,the two are in positive correlation;otherwise,the two are in negative correlation.The internal friction angle and cohesive force are decreases as the moisture content increases.

关 键 词：土石混合体 大型直剪试验 粗颗粒含量 含水率 

分 类 号：U416.03[交通运输工程—道路与铁道工程]