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西乡盆地膨胀上分为三种类型:Ⅰ类为具有弱膨胀潜势的黄褐—褐黄色膨胀土;Ⅱ类为具有中等膨胀潜势的褐黄—浅棕红色膨胀土;Ⅲ类为具有强膨胀潜势的灰绿—灰白色膨胀土。根据西乡盆地膨胀土的基本常规指标(粘粒粒组含量、液限和塑性指数),与西多盆地膨胀土胀缩特性指标的相关性,应用多变量数学分析建立判别函数式,来判别西乡盆地膨胀土。上述研究对西乡地区的建设具有重要的意义。
There are three types of expansion in the Xixiang Basin: Type I is yellow-brown-brown-yellow expansive soil with weak expansion potential; Type II is a brownish yellow-light brown-red expansive soil with moderate expansion potential; Class III has Strong swelling potential of gray-green - gray expansive soil. According to the basic routine indicators of expansive soil in the Xixiang Basin (cohesion group content, liquid limit and plasticity index), and the correlation of swelling and shrinkage characteristics of expansive soil in the Xiduo Basin, a multivariate mathematical analysis was used to establish the discriminant function formula to determine Xixiang Basin expansive soil. The above studies are of great significance to the construction of the Xixiang area.