碎石化条件等级路水泥混凝土路面加铺层结构优化

该文采用有限元法建立了碎石化条件下混凝土路面二维平面应变模型,对标准轴载和超载条件下不同类型加铺层结构的力学响应进行计算,综合比较路面弯沉、层底拉应力、层底拉应变等各项指标,提出半刚性基层加薄层沥青罩面可作碎石化条件下的加铺层结构;通过优化比较,得出采用半刚性基层加沥青面层可满足设计要求,并对各种基层材料的抗干、温缩,抗水损害等性能进行了比较。

Overlay Structure Optimization of Cement Concrete Pavement of Rubblization-class Road

The article uses the finite element method to set up the 2-D plane strain model and calculates the mechanics respond of the different overlaying structures under the conditions of standard shaft load and overload.The article comprehensively compares various indexes of pavement deflection,bed tensile stress and bed tensile strain,and puts forward that the semi-rigidity based plus thin asphalt overlaying can be taken as the overlay structure under the condition of rubblization.After the optimization and comparison,the semi-rigidity base plus asphalt surface can satisfy the design requirement.The article compares the performances of anti-drying,temperature contracting and anti-water damages of various base materials.