Study On The Stability Of Near-river Embankment Which Also Serves As A Highway

It is often encountered in water conservancy engineering levees to make use of levees,so it is necessary to study the stability of riverside levees.Based on the limit equilibrium theory and finite element method,the stability of the embankment under the condition of using the Mandao River embankment as the highway in the widening and rebuilding project of Jiandu Road in Jiangdu District is studied in this paper.1.In the case of construction period and sudden drop of water level,the total stress method is used to calculate the safety factor of embankment anti-slide stability,and the results are as follows:the minimum safety factor of stability is greater than 3 grade under all kinds of working conditions,allowable value K under normal working condition isl.20,allowable value K under abnormal working condition is 1.10,which meet the requirements of the specification.After the implementation of the highway,because of the increase of the pressure on the top of the river embankment,the safety factor of anti-slide stability of embankment slope near the water side is decreased.The safety factor of anti-slide stability of embankment slope near the water side is decreased.2.Using finite element model,the influence of vehicle dynamic load on slope stability is studied for two typical embankment sections,and the results are as follows:(1)For Jiandu Road in the Jiangdu District,after the reconstruction of the original Mandao river embankment and the main road of the embankment,the effect of vehicle dynamic load on the displacement of embankment after reconstruction of embankment is very small during the running period of embankment.And the maximum displacement of the top of the embankment caused by the vehicle dynamic load is about 1.1mm.In the course of vehicle dynamic loading,the maximum value of each stress component in the embankment of Jiandu Road is not more than 0.09MPa,so it is not harmful to the embankment.(2)Through the plane finite element analysis,the vehicle dynamic load has certain influence on the stability safety factor of the highway roadbed slope.The minimum stability safety factor can be reduced to 1.011;The reduction of the safety factor of vehicle dynamic load to the slope of the riverside highway by 1.011.And the minimum stability safety factor to the opposite land side decreases by 0.301;The effect of vehicle dynamic load on the slope stability of Mandao River can be neglected.3.The results obtained by the two methods are in good agreement.In general,under the condition of considering or not considering the dynamic load of the vehicle,the preliminary design of the road slope in this section is stable and meets the safety requirements of the code.