Expansive Soil Subgrade Slope Stability Analysis And The Slope Of Integrated Management

On the basis of the test result of a section of Jing-Xiang freeway's swelling soil examination, the paper analyses the mechanical mechanism of swelling soil side slope's collapse and establishes the geometry shape of swelling soil subgrade's collapse. On the other hand, the paper applies this result to analyses and calculates the stability of swelling soil's subgrade. Thirdly, the paper point out that the key reasons of swelling soil subgrade's collapse are swelling soil's expand-shrink property , cranny property, strength decrease property and weak frame surface property. As the result of this, the paper provides theoretical foundation for evaluating the stability of swelling soil subgrade's side slope.Finally, the author point out that the ratio of side slope's selection should considered with factual project items and adopt corresponding disposal methods so as to prevent side slope's collapse.