典型膨胀土抗剪强度参数试验统计规律研究

Study on Statistical Law of Shear Strength Parameter Test of Typical Expansive Soil

目前关于膨胀土抗剪强度参数的试验研究较多,主要集中在含水量、黏粒含量、干湿循环、上覆压力等单一因素对膨胀土抗剪强度参数的影响,而从多因素角度对膨胀土抗剪强度参数影响的研究很少。该文将以湖北襄阳地区典型膨胀土室内试验为基础,以取样深度、含水量、饱和度、塑限指数和自由膨胀率为影响因子,采用matlab软件建立了上述影响因子与抗剪强度参数的统计关系,并以某膨胀土边坡作为工程实例进行计算分析,分析结果表明其统计规律较适合该地区膨胀土抗剪强度参数的取值。

At present,there are many experimental studies on the shear strength parameters of expansive soils,mainly focusing on the effects of water content,clay content,dry-wet cycle,overlying pressure and other single factors on the shear strength parameters of expansive soils,while there are few studies on the effects of multiple factors on the shear strength parameters of expansive soils.Based on the laboratory tests of typical expansive soils in Xiangyang area,Hubei Province,and taking the sampling depth,water content,saturation,plastic limit index and free expansion rate as influencing factors,this paper establishes the statistical relationship between the above influencing factors and shear strength parameters by using MATLAB software,and calculates an expansive soil slope as an engineering example.The analysis results show that the statistical law is more suitable for the selection of shear strength parameters of expansive soils in this area.