水泥混凝土桥面铺装薄层加铺技术研究
发布时间:2018-04-10 11:37
本文选题:桥面铺装 + 细粒式SMA ; 参考:《重庆交通大学》2014年硕士论文
【摘要】:桥面铺装层作为桥梁行车体系的重要组成部分,,其质量的好坏对于行车对桥面板的荷载冲击和满足行车的安全性与舒适性以及对桥梁结构的保护具有至关重要的影响。桥面铺装层应具有足够的强度和良好的整体性,并具有足够的抗裂、抗冲击和耐磨性能等,但在实际工程中,为了减轻桥梁荷载和需维护工程,在特殊情况下需要采用厚度更小的进行桥面铺装,但此薄层铺装技术还处于研究试验阶段。也正是因为处于试验阶段且采用何种更加细粒式的铺装材料进行薄层加铺成为了本论文的研究重点,也在一定程度上使得本论文更具挑战性和艰巨性。 主要研究内容及成果:针对薄层铺装的特殊要求,通过对现有桥面铺装的病害分析,对薄层铺装对防水粘结、细粒式改性沥青混合料类型及薄层施工技术展开了研究;研究采用了溶剂型AMP-100和均相橡胶沥青以解决薄层铺装与水泥混凝土桥面板之间的层间防水粘结问题,通过性能对比研究,采用均相橡胶沥青作为防水粘结材料;以直投法的沥青混合料改性技术解决小规模生产中的沥青改性问题;选用了细粒式SMA-5解决薄层铺装施工中的最大粒径问题,采用贝雷法对级配进行优化设计,得到了骨架密实结构以及考虑铺装层厚度变化对沥青混合料力学和路用性能的影响确定了最佳铺装层厚度为30mm;比较系统地研究桥面铺装施工工艺的基本要求和桥面板处理的方法,以及对同步热预拌碎石防水粘结层和SMA桥面面层铺装在施工过程中出现的常见问题进行了研究与总结。
[Abstract]:As an important part of the bridge driving system, the quality of bridge deck pavement has a vital impact on the impact of traffic load on the deck, safety and comfort of driving and the protection of bridge structure.Bridge deck pavement should have sufficient strength, good integrity, and sufficient anti-cracking, impact and wear resistance, etc., but in practical projects, in order to reduce the bridge load and maintenance works,In the special case, the bridge deck pavement with smaller thickness is needed, but the thin layer surfacing technology is still in the stage of research and test.It is precisely because of what kind of finer grain paving material is in the experimental stage that it becomes the focus of this paper, and to some extent makes this paper more challenging and arduous.Main research contents and achievements: according to the special requirements of thin layer pavement, through the analysis of the existing bridge deck pavement disease, the thin layer pavement to waterproof bond, fine grain modified asphalt mixture type and thin layer construction technology were studied.Solvent-based AMP-100 and homogeneous rubber asphalt are used to solve the problem of interlayer waterproof bond between thin layer pavement and cement concrete bridge slab. Through performance comparison, homogeneous rubber asphalt is used as waterproof bond material.The bituminous mixture modification technology of direct casting method is used to solve the problem of asphalt modification in small-scale production, the fine grain type SMA-5 is used to solve the maximum particle size problem in thin layer pavement construction, and the method of Bayley is used to optimize the gradation design.The optimum thickness of asphalt mixture is determined to be 30mm considering the influence of the thickness of pavement on the mechanical and road performance of asphalt mixture, and the basic requirements of bridge deck pavement construction technology and the bridge pavement construction technology are systematically studied.The method of panel processing,The common problems in the construction process of waterproof bonding layer and SMA bridge deck pavement of synchronous hot ready-mixed crushed stone are studied and summarized.
【学位授予单位】:重庆交通大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:U443.33
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