Structure Design Of Steel-box Beam Bridge Pavement Based On Epoxy Resign Grouted Asphalt Concrete

Steel deck bridge pavement technology is the key to the construction of box-girder bridge, more and more steel box-girder bridge is building in our country, but has not yet formed an effective form of pavement materials and structures, and the pavement has not reached the designed service life but appears the disease such as process or cracking easily.In this paper, relying on the Hubei province item of science and technology projects, research on unti-process or unti-cracking technology of Wuying Steel box girder highway bridge pavement. Through ANSYS finite element simulation, provide a new design program of steel bridge deck pavement based on the modulus gradient. Firstly, paving matrix asphalt concrete that use high viscous modified asphalt which has the void fraction of 25% and the thickness of 3cm. Secondly, grouting the high compress strength and toughness epoxy resin materials in the porous concrete under the normal temperature and pressure. On the one hand, the grouting epoxy resin material changed from plastic to 3D IPN status, which enhanced its mechanical and road performance, on the other hand, as the good bongding properties of epoxy resin slurry which enhanced the cooperative deformation capacity between the slurry and the steel deck, Thirdly, Spraying a stress absorbing and waterproofing layer which can prevent reflection cracks composed by high viscosity modified asphalt and 5～10mm particle of the basalt stones. Finally, paving 4cm thickness SMA13 that also using high viscous modified asphalt to improve the traffic comfort and safety. Then analysised the strength formation mechanism of epoxy resin grouted asphalt concrete throuth microscopic angle.Produced the asphalt concretes which has the void fraction of 20~30% througth the mineral aggregate gradation design and bitumen-aggregate ratio optimization, aim at the brittle problem that exist in the ordinary epoxy resin grouting material, adding flexibilizer adopted measures to deal with their toughness, through the optimization design of grouting materials, produced high strength, high tenacity and easily irrigated porous asphalt concretes to suit different asphalt concretes that have different void fraction. Through the comparison of marshall stability, water stability performance of epoxy resin grouted asphalt concrete(EGA), we choose the asphalt concrete which has the void fraction of 25% used as basal body. Researched high temperature stability, low temperature property, shear resistant property and fatigue performance of EGA, and compared with the other typological asphalt concrete such as ChemCo EA, TAF EA, SMA and AC, tested the interface shear resistance properties between the asphalt concrete which has the filling rate of 20-100% and steel deck and road performance of the composite structure. All this showed that EGA has the best performance among the other asphalt concretes when its filling rate is 80%. And this article also showed that the EGA has the best coordinated deformation ability togerther with the deck after compared the fatigue test among the the other schemes. This article provided the construction technology for Wuying highway steel deck bridge pavement, it also supplied us a new method to resolve the ubiquitous technical problems exist in the steel box girder bridge pavement such as process or cracking currently with low construction cost and convinent construction process.