【摘要】 为了探索土工格室加固风积沙上路床对风积沙路基动应力响应的影响，依托S21阿乌沙漠高速公路工程，分别对土工格室加固风积沙上路床和砾类土上路床2种不同上路床结构的路基进行了动应力测试。采用现场试验与理论分析相结合的方法，针对行车动荷载对土工格室加固风积沙路基影响过程及规律展开研究。研究结果表明：风积沙路基顶面动应力随行车荷载的增加呈线性增大的趋势、随行车速度的增加呈线性减小的趋势，且车辆轴重的影响大于车速；动应力在风积沙路基的纵向呈指数函数形式衰减；动应力在土工格室加固风积沙层的竖向衰减系数约为砾类土层的2倍。根据动应力衰减曲线和自重应力线确定了沙漠高速公路路基工作区深度的计算方法，研究结果可为沙漠高速公路路基设计提供参考。更多还原

【Abstract】 In order to explore the influence of geocell-reinforced aeolian sand on dynamic stress response of roadbed, dynamic stress tests were conducted on two different roadbed structures of geocell reinforced aeolian sand roadbed and gravel soil roadbed respectively based on the S21 Awu Desert Expressway Project. A combination of field test and theoretical analysis was used to study the process and the law of the influence of driving dynamic traffic load on the geocell reinforced aeolian sand roadbed. The research results show that the dynamic stress on the top surface of aeolian sand roadbed shows an increasing linear trend with the increase of traffic load and a linearly decreasing trend with the increase of traffic speed, and the influence of vehicle axle weight is greater than that of vehicle speed. The longitudinal decay of dynamic stresses in the aeolian sand roadbed is an exponential function, and the vertical attenuation coefficient of dynamic stress in geocell-reinforced aeolian sand layer is about twice that of gravel soil layer. The calculation method of the depth of the working area of the desert expressway roadbed is determined according to dynamic stress decay curve and self-weight stress line. The study results can provide a reference for the design of desert expressway roadbeds.更多还原