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
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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。Abstract: 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 .
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