| Global plate tectonics and the dynamic conditions of the decision issued by the earthquake in China is a country. In recent years,mainland China earthquake's a growing trend,and has activities in high frequency, intensity, source characteristics of shallow and wide distribution, earthquakes and other natural disasters,the gravity constitutes one of China's basic national conditions. Road embankment is the most common structure,with the characteristics of the amount over a broad,one was damage,the damage is universal, in terms of its damage on the roads,bridges and other key structures better than poor. Therefore, in order to cause long-term development of China's highways carried out fill embankment structure under seismic loads is the dynamic response characteristics of road sector is an urgent need to resolve.In this paper, seismic problems at home and abroad roadbed on the basis of a number of outcome studies produced similar to the overall structure of embankment fill model,using large-scale shaking table physical simulation test system to study a variety of operating conditions fill embankment structure model of ground motion response to characteristics. Analysis of seismic waves in horizontal and vertical seismic wave, the fill embankment structure within the model and the dynamic response of acceleration and displacement, as well as gravity retaining wall earth pressure change characteristics ,Gravity retaining wall on the pressure changes of the ground-breakong for the theoretical analysis.On the seismic performance of highway subgrade, the first time a large seismic array test system to carry out related experimental research, research methods and research results are so innovative. Through the trial,clear fill subgrade dynamic load parameters on the response of different characteristics and rules of research,on improving the seismic design of embankment,subgrade structure to improve seismic performance to ensure smooth highway safety and operations of great significance. |
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