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为了研究上硬下软型双层路基动力稳定性在交通运营期内多个影响因素排序的技术问题,在室内模型试验、动三轴试验以及扫描电镜试验的基础上,将试验数据、专家打分法与三标度法相结合,以车辆荷载参数、土层分布特征及力学参数、土体物理参数和循环作用参数为准则层,构建出层次结构模型。借助MATLAB程序对判断矩阵进行计算处理,获得各影响因素的权重大小,其重要性程度由大到小依次为荷载循环次数、硬壳层厚度、荷载循环频率、车重、硬壳层硬度、软土含水率、行车速度和硬土含水率,软土层是控制路基稳定性的关键层。
In order to study the technical problems of the sequencing of several influencing factors on the dynamic stability of the soft and hard double subgrade under traffic operation period, based on the indoor model test, the dynamic triaxial test and the scanning electron microscope test, the test data and the expert scoring Method and three-scale method, the vehicle load parameters, soil distribution characteristics and mechanical parameters, soil physical parameters and cycling parameters as a guideline layer to build a hierarchical structure model. With the aid of MATLAB program, the judgment matrix is calculated and processed, and the weight of each influencing factor is obtained. The order of importance is the number of load cycle, the thickness of hard shell, the frequency of load cycle, the weight of car, the hardness of hard shell, Soil moisture content, driving speed and hard soil moisture content, soft soil layer is the key to control the stability of subgrade.