轻型组合钢桥面聚合物超薄磨耗层试验研究
发布时间：2019-04-08 16:49
【摘要】：为解决钢桥面疲劳开裂和铺装层易损坏这两大难题，作者所在的研究团队在理论研究及材料性能研究的基础上，提出钢桥面板+STC组合桥面结构。为了保护STC层不受行车磨损及外界环境因素的影响，同时改善表面抗滑性能，有必要研究与之性能相匹配的桥面磨耗层。鉴于TPO作为桥面磨耗层时性能优良，，本研究将TPO应用在钢桥面板+STC组合桥面结构上，组成钢板+STC+TPO的轻型组合钢桥面铺装体系。本文针对钢板+STC+TPO的轻型组合钢桥面铺装体系开展试验研究，考察TPO粘结性能和耐久性能。主要研究工作如下： （1）在充分分析借鉴国内外薄层聚合物磨耗层的应用现状的基础上，提出将性能优异的TPO用于钢桥面+STC组合桥面结构。 （2）为解决桥面铺装由于层间粘结力不足引起的结构性损坏，本文对聚氨酯环氧树脂粘结剂自身的粘结性能展开研究；采用斜剪、压剪、拉拔试验测试TPO-STC结构的层间粘结性能；通过组合梁弯拉试验测试TPO-STC结构层间的相对位移评价结构的层间连续性。试验结果表明，聚氨酯环氧树脂能够提供足够的剪切强度，使上下层间粘结完好；TPO与STC层间粘结状态良好，常温和高温条件下都能保持良好的粘结强度、剪切强度，且表面进行处理后，表面粘结强度、剪切强度提高；TPO粘结性能优良，TPO-STC的树脂部分能够承受荷载作用在TPO-STC界面产生的微小位移，保持TPO-STC结构处于共同受力状态。 （3）通过研究TPO-STC组合结构的高温稳定性能、水稳定性能和高温老化性能对TPO耐久性能进行评价。试验结果显示，TPO能提供足够的摩擦值和表面构造深度，为车辆安全通行提供有力保障；高温老化、冻融循环对摩擦值、表面构造深度的影响较小，试验过程中未出现车辙现象，同时界面仍能保持很高的拉拔强度，使TPO-STC结构共同受力。 （4）基于本文试验分析结果以及相关工程经验，文章提出TPO应用于轻型组合铺装体系的施工技术要求，对施工过程中树脂材料的储存与拌合、STC面板处置、撒布法施工及技术要求等方面进行了详细介绍，为实际工程应用提供了施工技术指导。
[Abstract]:In order to solve the two difficult problems of steel bridge deck fatigue cracking and pavement damage, the author's research team put forward the steel deck STC composite bridge deck structure on the basis of theoretical research and material performance research. In order to protect the STC layer from the influence of driving wear and environmental factors, and to improve the anti-skid performance of the surface, it is necessary to study the wear layer of bridge deck matching its performance. In view of the excellent performance of TPO as the wear layer of bridge deck, this paper applies TPO to the steel deck STC composite deck structure to form the light-weight composite steel deck pavement system of steel plate STC TPO. In this paper, an experimental study on the light-weight composite steel deck pavement system of steel plate STC TPO is carried out, and the bond and durability of TPO are investigated. The main research work is as follows: (1) on the basis of analyzing the application status of thin-layer polymer wear layer at home and abroad, TPO with excellent performance is proposed to be used in steel bridge deck STC composite bridge deck structure. (2) in order to solve the structural damage of bridge deck pavement caused by insufficient bonding force between layers, the adhesive properties of polyurethane epoxy resin binder were studied in this paper. The interlaminar bond behavior of TPO-STC structure was tested by oblique shear, compression shear and pull-out test, and the interlaminar continuity of TPO-STC structure was evaluated by flexural-tensile test of composite beam. The experimental results show that the polyurethane epoxy resin can provide enough shear strength to make the bonding between the upper and lower layers intact. The bonding state between TPO and STC layer is good, and good bond strength and shear strength can be maintained at room temperature and high temperature. After surface treatment, the surface bond strength and shear strength are improved. The bonding property of TPO is excellent. The resin part of TPO-STC can withstand the small displacement caused by load on the interface of TPO-STC and keep the structure of TPO-STC in the state of common force. (3) the high temperature stability, water stability and high temperature aging properties of TPO-STC composite structure were studied to evaluate the durability of TPO. The test results show that TPO can provide enough friction value and surface structure depth to provide a strong guarantee for the safe passage of vehicles. High temperature aging, freezing-thawing cycle has little effect on friction value and surface structure depth. No rut phenomenon appears in the test process. At the same time, the interface can still maintain a high drawing strength, which makes the TPO-STC structure under common stress. (4) based on the test and analysis results of this paper and related engineering experience, this paper puts forward the technical requirements for the application of TPO in light-duty composite pavement system, the storage and mixing of resin materials in the construction process, and the disposal of STC panel. The construction and technical requirements of spreading method are introduced in detail, which provides technical guidance for practical engineering application.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.33
本文编号：2454752
[Abstract]:In order to solve the two difficult problems of steel bridge deck fatigue cracking and pavement damage, the author's research team put forward the steel deck STC composite bridge deck structure on the basis of theoretical research and material performance research. In order to protect the STC layer from the influence of driving wear and environmental factors, and to improve the anti-skid performance of the surface, it is necessary to study the wear layer of bridge deck matching its performance. In view of the excellent performance of TPO as the wear layer of bridge deck, this paper applies TPO to the steel deck STC composite deck structure to form the light-weight composite steel deck pavement system of steel plate STC TPO. In this paper, an experimental study on the light-weight composite steel deck pavement system of steel plate STC TPO is carried out, and the bond and durability of TPO are investigated. The main research work is as follows: (1) on the basis of analyzing the application status of thin-layer polymer wear layer at home and abroad, TPO with excellent performance is proposed to be used in steel bridge deck STC composite bridge deck structure. (2) in order to solve the structural damage of bridge deck pavement caused by insufficient bonding force between layers, the adhesive properties of polyurethane epoxy resin binder were studied in this paper. The interlaminar bond behavior of TPO-STC structure was tested by oblique shear, compression shear and pull-out test, and the interlaminar continuity of TPO-STC structure was evaluated by flexural-tensile test of composite beam. The experimental results show that the polyurethane epoxy resin can provide enough shear strength to make the bonding between the upper and lower layers intact. The bonding state between TPO and STC layer is good, and good bond strength and shear strength can be maintained at room temperature and high temperature. After surface treatment, the surface bond strength and shear strength are improved. The bonding property of TPO is excellent. The resin part of TPO-STC can withstand the small displacement caused by load on the interface of TPO-STC and keep the structure of TPO-STC in the state of common force. (3) the high temperature stability, water stability and high temperature aging properties of TPO-STC composite structure were studied to evaluate the durability of TPO. The test results show that TPO can provide enough friction value and surface structure depth to provide a strong guarantee for the safe passage of vehicles. High temperature aging, freezing-thawing cycle has little effect on friction value and surface structure depth. No rut phenomenon appears in the test process. At the same time, the interface can still maintain a high drawing strength, which makes the TPO-STC structure under common stress. (4) based on the test and analysis results of this paper and related engineering experience, this paper puts forward the technical requirements for the application of TPO in light-duty composite pavement system, the storage and mixing of resin materials in the construction process, and the disposal of STC panel. The construction and technical requirements of spreading method are introduced in detail, which provides technical guidance for practical engineering application.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.33
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