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Application and construction conditions of FRP combined bridge

Date: 2019-09-29 Popularity:
FRP combined bridge
What is the use of FRP combined bridge? The following is a brief introduction.
FRP combined bridge has the advantages of light weight and high strength, corrosion resistance, aging resistance, flame retardant, insulation, beautiful appearance, convenient construction, no need to apply antirust layer, high internal and external surface smoothness, and strong ability to adapt to the environment. Only the pipe box needs to be bolted to the support frame during work, and the joints and box cover also need to be fastened with bolts, which saves time and labor during installation; due to its good corrosion resistance and other properties, the thermal conductivity of the glass fiber reinforced plastic bridge , Only a few hundredths of metal materials, so the thermal stress generated when working in a large temperature difference environment is much smaller than metal. That is to say, its thermal deformation rate is very low, and it is more suitable for long-term use on bridges placed in the open air and in harsh temperatures.
The construction environmental conditions are: the temperature is higher than 15 ℃, and the relative humidity is not greater than 80%. The inner lining layer and the head are formed by hand paste, and the strength layer of the barrel section is wound with a tape. The overlap width between adjacent tapes should be at least 50mm. The overlap positions should be staggered with each other to apply a certain tension to the tape. Manholes, spouts, and other parts such as nozzles and nozzle flanges must be molded by contact molding. When the thickness of the laminate is more than 4mm, it should be formed by layer curing. The surface of the product can be demolded with a hardness value greater than 30, and knocking is prohibited during demolding, and it should be placed stably after demolding. All mechanically processed sections on the product must be sealed with the same resin formulation. The connection parts of the glass fiber reinforced plastic composite bridge parts must be sanded. The shaved area should exceed the bonding surface. The joints should be filled with the same formula resin cement and reinforced with equal strength.