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通过高压固结试验,采用三种不同的数据处理方法求取膨胀土的结构屈服压力;通过直剪试验获得膨胀土的结构强度,并分析其与结构屈服压力的关系。结果表明:随着含水量的降低,结构屈服压力的增量要比结构强度的增量快;结构强度增量同结构屈服压力增量均呈线性相关关系;在施加正应力和剪应力的共同作用下,膨胀土的结构在正应力还没有达到结构屈服压力时就开始出现破坏。
Through the high-pressure consolidation test, three different data processing methods were used to calculate the structural yield pressure of expansive soils. The structural strength of expansive soils was obtained by direct shear tests and the relationship between them was analyzed. The results show that with the decrease of water content, the increment of structure yield pressure is faster than that of structural strength. The increment of structural strength is linearly correlated with the increase of structural yield pressure. Under the common application of normal stress and shear stress Under the action, the structure of expansive soil begins to break down when the normal stress has not reached the structural yield pressure.