钢桥面铺装层预防性养护技术研究

发布时间：2018-03-16 19:32

本文选题：钢桥面铺装层　切入点：雾封层　出处：《东南大学》2015年硕士论文　论文类型：学位论文

【摘要】：钢桥面铺装层在其运营过程中由于环境、使用寿命、材料和施工等因素会导致表面损害。雾封层与碎石封层技术能够防止路表水下渗,延缓道路老化,碎石封层技术还能提高路表抗滑性能,在国内外沥青路面预防性养护工程中应用广泛。目前将雾封层与碎石封层技术运用于钢桥面铺装预防性养护的工程实践较少,鉴于此,主要对钢桥面铺装用雾封层与碎石封层技术展开研究。首先根据钢桥面铺装层表面损害特点,制定钢桥面铺装用雾封层与碎石封层性能评价指标,包括封层后表面构造深度、抗滑性能、防渗水性能与封层耐久性能四个方面,并分别设定了各项指标的优、良、差三级分级标准。然后,分别对钢桥面铺装用雾封层和碎石封层进行研究。对于钢桥面铺装用雾封层,通过试验确定其最佳乳化沥青有效用量及涂刷遍数,并对其性能进行评价。试验结果表明,雾封层可以有效改善钢桥面铺装用环氧沥青混凝土及改性沥青SMA铺装层表面防渗水性能,但不能改善其表面构造深度及抗滑性能；含砂雾封层不仅防渗水性能较好,且能稍许提高环氧沥青铺装层表面构造深度及抗滑性能；此外,本文设计的钢桥面铺装用雾封层均具有较好的耐久性能。对于钢桥面铺装用碎石封层,选择2种级配形式即单粒径碎石封层(S型碎石封层)、级配碎石封层(G型碎石封层),并分别通过经验公式得到其理论最佳碎石用量和最佳环氧沥青用量。两种碎石封层可以改善钢桥面铺装用环氧沥青铺装层表面抗滑性能,并弥补其表面构造深度的不足；采用S型碎石封层后铺装层表面渗水性能比G型碎石封层后更好,但从渗水系数指标改善率来看,无论S型或G型碎石封层都不能提高铺装层表面防渗水性能。由G型碎石封层加上表面雾封层的封层组合结构,能够提高钢桥面铺装层表面构造深度,改善抗滑性能及防渗水性能,并具有良好的耐久性能。最后对钢桥面铺装层预防性养护时机选择方法及施工关键技术进行了研究。采用效益费用法,可得钢桥面环氧沥青铺装层实施碎石封层预防性养护的时机选择区间为其投入使用后41个月～63个月之间。在雾封层施工过程中须把控雾封层材料的喷洒量及专用喷洒机的施工工艺。在碎石封层施工过程中,要精确控制、监测碎石与沥青撒布量。根据研究结果提出了钢桥面铺装层预防性养护施工质量验评标准。
[Abstract]:Steel bridge deck pavement will cause surface damage due to the environment, service life, material and construction factors during its operation. Fog seal and gravel sealing technology can prevent underwater infiltration of road surface and delay road aging. The technology of gravel sealing can also improve the skid resistance of pavement surface and is widely used in the preventive maintenance engineering of asphalt pavement at home and abroad. At present, the application of the technology of fog seal and gravel seal in the engineering practice of preventive maintenance of steel bridge deck pavement is relatively few, in view of this, Based on the characteristics of surface damage of steel bridge deck pavement, the performance evaluation indexes of fog seal layer and gravel seal layer for steel bridge deck pavement are established, including the depth of surface structure after sealing. Four aspects of anti-skid performance, anti-seepage performance and durability of sealing layer are set, and three grading standards of excellent, good and poor are set respectively. Then, The foggy sealing layer and gravel sealing layer for steel bridge deck pavement were studied respectively. The optimum effective amount of emulsified asphalt and the number of brush times were determined by test for the fog seal layer of steel bridge deck pavement, and its performance was evaluated. The surface water resistance of epoxy asphalt concrete and modified asphalt SMA pavement for steel bridge deck pavement can be effectively improved by fog sealing layer, but it can not improve the surface structure depth and skid resistance, and the sand fog sealing layer not only has good water seepage prevention performance, but also can not improve the surface structure depth and anti-slip performance. In addition, the fog seal for steel bridge deck pavement designed in this paper has good durability. Two kinds of gradation forms are selected, that is, single diameter gravel seal layer and S-type gravel seal layer, gradation gravel sealing layer and G type crushed stone seal layer. The theoretical optimum amount of crushed stone and the best amount of epoxy asphalt are obtained respectively by empirical formula. The sealing layer can improve the surface skid resistance of epoxy asphalt pavement for steel bridge deck pavement. And to make up for the shortage of surface structure depth, the surface water permeability of S type gravel seal layer is better than that of G type stone seal layer, but the improvement rate of water permeability coefficient index is analyzed. Neither S-type nor G-type macadam seal layer can improve the surface impermeability of paving layer. The surface structure of steel bridge deck pavement can be improved by the combination of G type gravel seal layer and surface fog seal layer. This paper improves the anti-slide performance and anti-seepage performance, and has good durability. Finally, the selection method of preventive maintenance time and key construction technology of steel bridge deck pavement are studied, and the benefit cost method is adopted. It can be obtained that the time interval of preventive maintenance of macadam seal layer for epoxy asphalt pavement of steel bridge deck is between 41 months and 63 months after it is put into use. In the construction of fog sealing layer, the amount of spraying material and its special use should be taken into account. Construction technology of sprayer. In the course of construction of gravel seal layer, It is necessary to control accurately and monitor the quantity of gravel and asphalt distribution. According to the research results, the quality inspection and evaluation standard of steel bridge deck pavement preventive maintenance construction is put forward.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.7

【相似文献】