摘要
传统公路工程路面施工技术工艺要求道路路面水泥稳定粒料(底)基层的施工厚度一般要求碾压成型后摊铺厚度宜不小于160mm,最大摊铺厚度不大于200mm;对于与时俱进的工程施工领域已不能满足施工要求,结合新疆国道579项目以及乌奎高速互通项目的施工过程,通过机械改良、设计优化、技术优化等技术手段,改良出适合超大厚度(>30cm)水泥稳定土(底)基层整体摊铺的施工技术,该技术主要采用超大摊铺厚度、抗水稳级配离析、高震动振捣功率的水稳摊铺机摊铺,大吨位、高振幅、高震频震动进口压路机压实,大型灌砂筒(f200mm)压实度检测,采用薄膜+土工布覆盖+洒水养生7~10天,取芯检验整体性等一系列施工过程,开展超大厚度水稳的一次摊铺施工;通过施工过程不断优化施工工艺,改良施工技术,提高施工质量。
Traditional highway engineering pavement construction technology requires that the construction thickness of the cement stabilized aggregate(bottom)base layer of the road surface generally requires that the paving thickness after rolling should not be less than 160mm,and the maximum paving thickness should not exceed 200mm;For the advanced engineering construction field that no longer meets the construction requirements,combined with the construction process of Xinjiang National Highway 579 Project and the Wukui Expressway Interchange Project,through mechanical improvement,design optimization,technical optimization and other technical means,the construction technology suitable for the overall paving of ultra thick(>30cm)cement stabilized soil(bottom)base layer is improved.This technology mainly uses a water stabilized paver with ultra thick paving thickness,anti water stable gradation segregation,and high vibration vibration vibration power for paving.The imported roller with large tonnage,high amplitude,and high vibration frequency is used for compaction,and the compaction degree of the large sand filling cylinder(f200mm)is tested.The film+geotextile cover+watering and curing are used for 7~10 days,and the core is taken.Conduct a series of construction processes such as checking the integrity,and carry out a one-time paving construction with super thick water stability;Continuously optimize construction techniques,improve construction techniques,and enhance construction quality through the construction process.
作者
陈赞赞
CHEN Zanzan(Xinjiang Beixin Road and Bridge Group Co.,Ltd.,Urumqi,Xinjiang,830000,China)
