石膏对黄土力学性能的影响研究  

Effect of Gypsum on the Mechanical Properties of Loess

作　　者：寇小娜[1] 崔自治[1] 卜勇 周伟红[1] 

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021 [2]宁夏建筑科学研究院有限公司,宁夏银川750021

出　　处：《人民黄河》2015年第9期106-108,共3页Yellow River

基　　金：教育部"长江学者和创新团队发展计划"创新团队项目(IRT1067)

摘　　要：为了探索石膏对黄土强度的作用规律,以石膏含量、干密度、含水量为因子,设计正交试验方案,通过全自动三轴仪试验研究石膏对黄土力学性能的影响。结果表明,黄土的强度随干密度、石膏含量的增大而增大,随含水量的增大而减小;应变随干密度、石膏含量的增大而减小,随含水量的增大而增大。3个因子中干密度的影响最显著,其次是石膏含量和含水量。石膏含量是影响黄土力学性能的重要因素,黄土中添加石膏能使黄土的强度提高、变形减小、水敏性降低。In order to explore the regularity of gypsum on the strength of loess, taking gypsum content, dry density and moisture content as factors, an orthogonal experimental scheme L9 （3^4 ） was carried out to study the effect of gypsum on the mechanical properties of loess by using automatic triaxial apparatus. The results show that, the strength of loess increases with the increase of dry density and gypsum content, decreases with the increase of moisture content; the strain decreases with the increase of dry density and gypsum content, increases with the increase of moisture content. The most significant influencing factor is dry density, followed by gypsum content and moisture content. Gypsum is an important factor affecting the mechanical properties of loess, which can increase the strength, decrease the deformation and reduce the water sensitivity of loess.

关 键 词：力学性能 干密度 含水量 石膏 黄土 

分 类 号：TU43[建筑科学—岩土工程] P642.131[建筑科学—土工工程]