低剂量水泥稳定碎石在渝湛高速公路中的应用

针对传统半刚性路面基层刚度过大、容易诱发各种早期破坏的问题,采取了柔化半刚性基层的方法,即合理地降低基层的模量。一方面,这样并不会降低路面的结构承载力;另一方面,基层模量与沥青混凝土面层模量的合理匹配,使面层内的剪应力和层底拉应力均控制在较低的应力水平,避免了早期损坏的发生。同时,结合国道主干线渝湛高速公路高桥~遂溪公路的建设,系统地提出了低剂量水泥稳定碎石的施工方法和控制指标,对于国内类似工程具有指导意义,同时也为道路设计理论的发展提供有益的借鉴。

Application of Low Content Cement Stabilized Gravel to Yu-Zhan Expressway

Aiming at too great stiffness of semi-rigid layer will cause all kinds of road damages,a reasonable measure to decrease the modulus of semi-rigid layer is put forward.It may not only guarantee the carrying capacity but also help to keep appropriate modules ratio between asphalt layer and semi-rigid layer,avoid shear stress and tension stress too sharply and the related shear failure in the asphalt layer.During the construction of Yu-Zhan Expressway,the low content cement stabilized gravel is successfully applied.The method and control index of construction are presented.The results show that the method is a significant innovation to the road design.In the future it is helpful to direct other same constructions and provide references for the pavement design theory.