小交通量农村公路不同路面结构形式性能评价及分析

Performance Evaluation and Analysis of Different Pavement Structure Forms of Small-Volume Rural Highway

摘要: 目前国内路面结构形式研究主要聚焦于高速公路等高等级路面，关于小交通量农村道路的研究较少。本文通过铺筑三种不同路面结构形式的小交通量道路，利用便携式路面弯沉仪(PFWD)对其进行测试，测试结果表明：采用水泥稳定碎石作为半刚性基层的贯入式路面比采用级配碎石的柔性基层贯入式路面，其动态弹性模量高出49.5%，采用水泥稳定碎石半刚性基层大粒径路面的动态弹性模量比贯入式的高49.5%。采用动态变形模量仪(LFG)对路面动态变形模量随机选点进行了测试并与PFWD测试结果进行对比发现，当弹性模量小于200 MPa时，二者检测结果较为相近，具有良好的幂函数相关性。

Abstract: The domestic research on pavement structure is mainly focused on expressway and other high-grade pavement. There are few researches on the rural roads with small traffic volume. In this paper, there are three different types of pavement structure of small traffic roads paved. The portable pavement deflectometer (PFWD) was used to detect the deflection. The test results show that: the dynamic elastic modulus of the embedded pavement with cement stabilized macadam as semi-rigid base is 49.5% higher than that with graded macadam; the dynamic elastic modulus of cement stabilized macadam with semi-rigid base course is 49.5% higher than that of the penetration type. Dynamic deformation modulus (LFG) was used to test the random selection of pavement dynamic deformation modulus and the results were compared with those of PFWD, finding that when the modulus of elasticity is less than 200 MPA, the test results of the two methods are similar and have good power correlation.