灌注式半柔性路面在陕西省干线公路应用研究

Research on the Application of Injecting Semi Flexible Pavement on Trunk Highways in Shaanxi Province

摘要: 通过对灌注式半柔性路面材料、设备、结构及施工工艺研究，根据大孔隙沥青混合料材料特性，提出采用均衡设计方法进行配合比设计，解决了大孔隙沥青混合料连通孔隙率及稳定度调控难题；采用自主研发的灌浆材料进行半柔性路面材料性能评价，通过高温稳定性、低温抗裂性及水稳定性分析，水料比对半柔性路面材料路用性能影响显著，结合实验路服役性能评价结果，推荐水料比不超过0.35；通过半柔性路面实验路服役性能观测，半柔性路面具备优良的抗车辙性能。通过对陕西省国省干线半柔性路面材料、结构设计及施工工艺研究，总结出适应陕西省国省干线渠化重载交通半柔性路面材料、结构及施工工艺关键技术，为陕西省同类项目实施提供有益借鉴。灌注式半柔性路面结构不仅节约了沥青等不可再生资源用量而且减少全寿命周期的养护费用，有效降低了重复建设对环境的破坏作用，半柔性路面是一种较理想的环保耐久型路面结构。

Abstract: By studying the materials, equipment, structure, and construction technology of cast-in-place semi flexible pavement, and based on the characteristics of macroporous asphalt mixtures, a balanced design method is proposed for mix proportion design, which solves the problem of controlling the connectivity porosity and stability of macroporous asphalt mixtures; the performance evaluation of semi flexible pavement materials was conducted using self-developed grouting materials. Through analysis of high temperature stability, low temperature crack resistance, and water stability, it was found that the water material ratio has a significant impact on the road performance of semi flexible pavement materials. Based on the results of experimental road service performance evaluation, it is recommended that the water material ratio should not exceed 0.35; through the observation of the service performance of semi flexible pavement experiments, it was found that the semi flexible pavement has excellent anti rutting performance. By studying the materials, structural design, and construction technology of semi flexible pavement for the national and provincial trunk lines in Shaanxi Province, key technologies suitable for the channelized heavy load transportation of the national and provincial trunk lines in Shaanxi Province have been summarized, providing useful reference for the implementation of similar pro- jects in Shaanxi Province. The injection type semi flexible pavement structure not only saves the use of non renewable resources such as asphalt, but also reduces the maintenance cost throughout the entire life cycle, effectively reducing the environmental damage caused by repeated construction. Semi flexible pavement is an ideal environmentally friendly and durable pavement structure.