广西某特大桥混凝土桥面铺装研究

发布时间：2018-05-26 10:13

本文选题：锚钉突出 + 平整度　；参考：《长沙理工大学》2015年硕士论文

【摘要】：便捷的交通是经济发展的首要前提,改革开放以来我国公路里程逐年增加,隧道、桥梁等大型工程也随之增加。由于我国对桥梁的研究比较晚,尤其在桥面铺装方面研究不够深入、施工质量控制不到位以及车辆超载严重的情况下,我国很多桥梁通车不久就出现桥面铺装早期破坏,桥面铺装的频繁维修不仅带来巨大的经济损失而且影响交通的顺畅。因此,有必要对桥面铺装的设计和施工引起足够的重视。广西某特大桥由于某些原因,其水泥混凝土调平层出现锚钉突出以及平整度差等问题,严重影响沥青混凝土桥面铺装施工。根据现场勘测以及前期调研,参考国内外桥面铺装的施工经验提出三种解决方案:(1)将水泥混凝土调平层破损和开裂的区域凿除,全桥拉毛、清理干净并喷洒防水剂,再按桥面设计标高分幅浇筑钢纤维混凝土;(2)对水泥混凝土调平层进行修整,再浇筑一层水泥混凝土将突出锚钉置于其内,并提高桥面平整度,最后按要求摊铺沥青混凝土铺装层;(3)将水泥混凝土调平层局部凿除并用AC-13C沥青混凝土局部调平,消除突出锚钉和平整度对沥青混合料摊铺和碾压的影响,对桥面设计标高进行调整后再施工双层沥青混凝土桥面铺装。三种铺装方案都能解决某特大桥现存问题对桥面铺装的影响,而从施工难度、工程造价、使用性能等方面进行比选,最终确定方案三为最佳方案,并从铺装材料和施工现场两方面对桥面铺装质量进行控制。其中方案三所涉及的沥青混凝土桥面调平、桥面线形和标高的调整可为国内同类混凝土桥梁类似问题的处理措施提供参考。
[Abstract]:Convenient transportation is the first prerequisite of economic development. Since the reform and opening up, highway mileage has increased year by year, tunnels, bridges and other large-scale projects have also increased. Due to the late research on bridges in our country, especially in the bridge deck pavement research is not deep enough, the construction quality control is not in place and the vehicle overload is serious, many bridges in our country will appear early destruction of bridge deck pavement soon after the opening of traffic. The frequent maintenance of bridge deck pavement not only brings huge economic losses but also affects the smooth traffic. Therefore, it is necessary to pay enough attention to the design and construction of bridge deck pavement. Due to some reasons, some problems such as outburst of anchor nails and poor smoothness of cement concrete leveling layer of a large bridge in Guangxi have seriously affected the construction of asphalt concrete bridge deck pavement. According to the site survey and previous investigation, and referring to the construction experience of bridge deck pavement at home and abroad, three solutions were put forward: 1) to cut out the damaged and cracked area of cement concrete leveling layer, to pull the whole bridge, to clean up and spray water repellent. Then according to the design of the bridge deck, the steel fiber reinforced concrete (SFRC) is built in a scale according to the design of the bridge deck. The leveling layer of the cement concrete is trimmed, and a layer of cement concrete is poured into it to place the prominent anchor nail in it and to improve the smoothness of the bridge deck. Finally, according to the requirements of spreading asphalt concrete pavement, the cement concrete leveling layer is partially chiseled out and AC-13C asphalt concrete is locally leveled to eliminate the influence of outburst anchor nails and smoothness on the paving and rolling of asphalt mixture. After adjusting the design elevation of bridge deck, double-deck asphalt concrete deck pavement is constructed. The three kinds of pavement schemes can all solve the influence of the existing problems on the deck pavement of a large bridge, and compare and select from the aspects of construction difficulty, project cost, performance, etc., and finally determine that the third scheme is the best scheme. The quality of bridge deck pavement is controlled from two aspects: pavement material and construction site. The adjustment of the pitch concrete bridge deck and the alignment and elevation of the bridge deck in the third scheme can provide a reference for the treatment of similar concrete bridge problems in China.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U443.33

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