水泥固化土的室内三轴试验研究  

Laboratory triaxial test of cement stabilized soil research

作　　者：杨廷玉[1] 张国忠[1] 张同伟[1] 马千惠[1] 肖永[1] 陈德鹏[1] 王琦[1] 

机构地区：[1]佳木斯大学建筑工程学院,黑龙江佳木斯154007

出　　处：《黑龙江工程学院学报》2015年第6期26-29,共4页Journal of Heilongjiang Institute of Technology

基　　金：黑龙江省大学生创新创业训练计划项目资助(20140222038);佳木斯大学重点项目资助(12Z1201522)

摘　　要：对水泥固化土进行三轴试验研究其力学特性,分析水泥固化剂掺量、养护时间对水泥固化土的应力-应变、强度及刚度的影响,并分析其产生的原因。研究结果表明:随着轴向应变的增加,偏应力不断增加,在轴向应变相同时偏应力随着水泥固化剂掺量和养护时间的增加而增加;破坏应力随着水泥固化剂掺量和养护时间的增加而增加;强度提高系数随着水泥固化剂掺量的增加而增加;随着轴向应变的增加,刚度不断衰减,加载初期刚度衰减较快,随着轴向应变的增加曲线逐渐趋于平稳,在轴向应变相同时刚度随着水泥固化剂掺量和养护时间的增加而增加;水泥固化剂的掺入使得土体的强度、刚度及抵抗变形的能力较未加固土明显增强,且随着水泥固化剂掺量和养护时间的增加而增强。Triaxial compression tests are carried out to investigate the mechanical properties of cement stabilized soils. In this study, influences of cement content and curing time on the strength and stiffness of cement stabilized soils are taken into account, and influence mechanism is analyzed. Test results show that deviatoric stress of cement stabilized soils increases with increasing axial strain, and also increases with increasing cement content and curing time at same strain. Failure stress increases with increasing cement content and curing time. Strength increasing coefficient increases with increasing cement content. As axial strain increases, stiffness involves a continuous attenuation. At the beginning, stiffness has a sharp decline, and then the attenuation rate gradually tends to a smooth stage as axial strain increases. At the same time, stiffness increases with increasing cement content and curing time. The inclusion of cement in soils significantly enhances the strength, stiffness and non-deformability of soils, which are proportional to the cement content and curing time.

关 键 词：三轴试验 水泥固化土 水泥 强度 刚度 

分 类 号：TU411[建筑科学—岩土工程]