干湿循环条件下紫色土抗剪强度与膨胀率研究  

On Dry-Wet Circulation under the Condition of the Purple Soil Area Planting Soil Shear Strength and Expansion Rate

作　　者：李妍[1] 彭义[1] 

机构地区：[1]西南大学工程技术学院,重庆400715

出　　处：《西南师范大学学报（自然科学版）》2015年第4期70-73,共4页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(51208078)

摘　　要：紫色土是四川盆地分布最广泛的土种,富含磷、钾等矿物质.紫色土具有一定的膨胀性,在经历季节性干湿循环过程中抗剪强度和膨胀率都有所衰减.以重庆地区原状紫色土为研究对象,通过进行干湿循环试验,研究其抗剪强度和膨胀率与干湿循环次数、干湿循环幅度以及含水量之间的关系,为紫色土地区相关工程设计提供参考.Purple soil of Sichuan Basin is the most widely distributed species .Because of rich in phosphor-us ,potassium and other minerals ,purple soil is very rich planting soil .Purple soil has some swelling ,af-ter seasonal dry-wet circulation shear strength and expansion rate are in the process of decay .Purple soil in Chongqing area as the research object .Through under dry-wet cycle test ,studied the shear strength and expansion ratio and the dry-wet cycles ,dry-wet circulation rate and the relationship between the moisture content .Provide the basis for purple soil region related engineering design values .

关 键 词：紫色土 干湿循环 抗剪强度 无荷载膨胀率 

分 类 号：TU443[建筑科学—岩土工程]