Loess Cutting Slope Form Of A Reasonable Cross-sectional Study

Due to the special quality of the loess, complicated geology and geography, many heavy cuts and high embankments will be needed when building high-grade highways in the loess areas. At present, we mainly depend on our experience during designing special subgrade in the areas because of lacking in sufficient scientific support and specific confirmed methods. On the basis of on-the-spot investigation and information, this article puts forward the stratum separation scheme and field criterion for projects in Gansu loess areas; presents the geological structure model of the natural slope in this area for the first time; counts and analyses the parameter of the loess; analyses the stability of loess cut with the method of ultimate balance and finite element; recommends different transect forms for the cut subgrade in Gansu's loess areas; evaluates these forms with grey system theory concerning stability, economy and anti-scour capability; finally, puts forward the design method and procedures ofreasonable heavy cuts transect.