Some cracks in buttress and deformation of wall were found during construction of high fill slope in Chongqing.

The results show that: With the increase of slope height and the reduction of slope gradient, the influence of vehicle load on slope stability become more and more small, and gradually stabilized; vehicle load on the top of slope has less influence on the stability of high fill slope than vehicle load on on the step of slope.

The 98km long main channel of Baojixia division project goes through Baoji city,Guozhen,Caijiapo etc industrial center and densely populated areas in Shaanxi Province along the edge of the slope, and border upon the Longhai Railway、XiBao middle road、XiBao highway, the stability of the loess high slope is extremely important.

According to the basic characteristic of some loess high slope,the texts deep into analyzed the breakage\'s influence factor and the model of the loess high slope,and make use of the engineering geology analysis method and number analysis method to evaluate the stability proceeds,finally get the conclusion that the slope be placed in unsteady settle.

Study on prediction model to estimate stability of high loess slope considering water content;

Optional design of high loess slope in highway based on reliability method;

Based on the characteristics of cutting high loess slopes and the assumption of arc-model slip surface in lower part,straight in the middle,and uprightness in the upper,a general expression of safety factor for step-shaped cutting high loess slope is deduced by the traditional concept of safety.