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针对路桥过渡段的动力响应问题,通过建立轨道路基动力分析模型,结合商业软件FLAC对某客运专线加筋土路桥过渡段、级配碎石路桥过渡段进行了仿真分析,将2种过渡段的计算结果进行对比分析、并将加筋土路桥过渡段的计算结果与实测数据进行比较,结果表明该模型能反映系统振动特性,并从理论上论证了加筋土路桥过渡段比级配碎石路桥过渡更能阻止动应力与振动加速度在路基中的传播,能使路基受到更小的动荷载影响。
Aiming at the dynamic response of road-bridge transition section, the dynamic analysis model of railway subgrade is established, and the commercial software FLAC is used to simulate the transition section of graded broken road and bridge with transitional section of reinforced earth road and bridge of passenger dedicated railway. The results of comparison show that the model can reflect the vibration characteristics of the system and demonstrate that the transition zone of reinforced earth road and bridge is more stable than the graded broken stone Road and bridge transition can prevent the dynamic stress and vibration acceleration in the subgrade spread, can make the subgrade by a smaller dynamic load.