Abstract:

Fill road embankment aside riverbank or widen riverbank as road embankment is often used in highway extend. The road embankment along riverbank built has what influences to the stability of riverbank, and has what characteristics of the stability, deformation and destroy mode to the road embankment. These are the main problems to be solved in river levee highway extend. Based on the results of local reconnaissance and in-situ as well as laboratory test, a finite element model is built to carry out analogy calculation and analysis of the stability of the riverbank and the road embankment under different water level before and after the road embankment built. The results indicate that: the build of road embankment is propitious to enhance the stability of the riverbank, the safety factors are increased about 26%; the embankment built aside riverbank is easy to generate differential settlement and big settlement. The total settlement could increase 35% as the widen of embankment. the road embankment can occur whole shear destroy on the slope far from the dam, and the seepage has little influence to the stability and would not change the destroy mode of the embankment. Numerical simulation can disclose the stability and destroy mode of the road embankment before the project built. Simulation results could offer reference and gist for the next engineering countermeasure design.

Key words: road embankment, seepage, stability, deformation, destruction, numerical simulation