【摘要】 为分析交通荷载在低路堤及其路基中的扩散和传递变化规律,从路基土工程特性和耦合动力学的角度,建立路基动力分析耦合力学模型,推导出耦合运动方程,以江苏连盐高速公路为研究背景,探讨不同工况下路基的动力响应规律.结果表明:车重、路堤高度、加载方式、路面基层刚度对路基振动影响明显,而车速对路基的影响不大,并将数值解和现场实测值进行比较,验证了所建路基耦合动力模型及计算方法的可靠性.更多还原

【Abstract】 To analyse the transmission rule of vehicle load in low embankment in view of the engineering characteristics of roadbed soil and coupling kinetics,a coupling mechanic model for dynamic analyses of roadbed is established.The differential equation for coupling motion is derived.Based on the background of Lianyungang-Yancheng Freeway in Jiangsu province,the variation laws of dynamic response of roadbed under different conditions are investigated.The calculational results show that the vehicle′s weight,height of embankment,mode of load and stiffness of base layer of pavement have prominent influences on the vibration of roadbed,but not the velocity.Through the comparison between the numerical values and the spot measured values,the reliabilities of constructed coupling dynamic model of roadbed and method of calculation are validated.更多还原