宕渣土路基上路面结构的受力特性研究

Research on mechanical characteristics of dang-slag roadbed pavement structure

为了证明宕渣土的优良性能,文章基于有限元软件ABAQUS建立了现场96区模型,并结合现场96区段内2个实测点的承载板弯沉试验,反演出了宕渣土基层顶面当量回弹模量。在此基础上通过三维双圆荷载计算模型对结构层底的拉应力和沥青路面的弯沉值进行了分析。结果表明,即使将5%水泥稳定碎石结构层的厚度减少9cm,采用宕渣土路基的路面结构仍要优于采用34cm厚5%水泥稳定碎石层的设计路面。

In order to prove that dang-slag roadbed has good performance, two test points within 96 sections have been chosen to carried out the bearing plate deflection tests. Based on the test data, the model of district 96 is established by the finite element software ABAQUS, then the modulus of resili- ence of dang-slag roadbed is inversed. Through 3D double circular load computation model, the bot- tom stress of structure and the deflection value of asphalt pavement are analyzed. The results show that even if the thickness of the 5% cement stable macadam structure layer is reduced by 9 cm, the dang-slag roadbed pavement structure is still superior to the 5 % cement stable macadam structure lay- er with a thickness of 34 cm.