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为了建立膨胀土的物化特性判定分析方法,采用物化特性指标pH、Zeta电位、比表面积、阳离子交换量和电导率,结合南宁市周边工程,对采集土样的物化特性指标及力学指标进行分析对比,采用Fisher法对采集的膨胀土物化特性指标进行判别分类,结果表明:1物化特性指标仪器分析简单,数据准确,重现性好;2膨胀土的物化特性指标和力学指标之间具有一定的相关性,可以使用膨胀土的物化指标对膨胀土进行判别分类;3采用Fisher判别分析方法得到的基于膨胀土物化特性的分类方法,可以对南宁地区的膨胀土进行准确的判定和分类。
In order to establish the physical and chemical properties of expansive soil, the physical and chemical properties of the collected samples were analyzed and compared with the physical and chemical properties of pH, Zeta potential, specific surface area, cation exchange capacity and conductivity, combined with the surrounding projects in Nanning City Fisher’s method was used to distinguish and classify the physical and chemical properties of expansive soils. The results showed that: 1 Physical and chemical properties were simple, accurate and reproducible; 2 There was a certain degree of physical and chemical properties between expansive soil and mechanical properties The expansive soils can be discriminated and classified according to the physical and chemical indexes of the expansive soils; 3 The classification method based on the physicochemical properties of expansive soils obtained by Fisher’s discriminant analysis method can accurately determine and classify the expansive soils in Nanning.