道路在动态荷载作用下孔隙水压力的数值模拟

Pore Water Pressure Numerical Analysis of Road under Load with Dynamic Characteristic

现行的路面设计方法没有考虑动力荷载的影响,动荷效应在道路的损伤中起着不可忽略的作用,研究动态荷载作用下的道路工作特性具有重要的意义.结合某高速公路实验场的原始测试资料,运用天津市软土特性与工程环境重点实验室的FLAC^(3D)(Fast Lagrangian Analysis of Continua)三维数值分析程序建立了道路动态分析模型,分析了动态特性交通荷载作用下孔隙水压力的变化规律,得出了同一点孔隙水压力的变化随荷载幅值及荷载振动程度的增强而增大,随道路材料阻尼比的增加而减小等几点重要结论;对于天津市软土路基工程特性更深入的研究具有重要意义,同时对于道路的设计与施工也有一定的参考价值.

The effect of dynamic load on the road damage which has great significance on research to the working character is not considered in the current pavement design. Combined with actual observation record, the road dynamic analytic model is built using Tianjin soft soil characteristic and project environment key laboratory FLAC software and the change law of pore water pressure is analyzed under dynamic traffic load. Some conclusions is drawn which has reference value for not only the soft soil roadbed project characteristic more thorough research but also design and construction of road.