A kind of high compression elastic cushion material and its application

Abstract

The invention relates to the technical field of hydraulic engineering, in particular to the technical field of PCCP tube pre-stress carbon fiber reinforcement. The invention particularly discloses a high-compression elastic cushion material and application thereof. The high-compression elastic cushion material is of a layered porous structure formed by mixing, volatilizing and curing single-component polyurea, a volatilizable solvent and polyphenyl granules. The high-compression elastic cushion material has the characteristics of high tensile strength, compressibility, low elastic modulus, seepage prevention, thermal insulation, ageing resistance and the like, can be used for reinforcing a PCCP tube pre-stress carbon fiber, overcomes the defects in the prior art, and can fully play the advantages of high carbon fiber strength during reinforcement of adhesion of carbon fiber cloth to the inner side of a PCCP tube.

Description

technical field [0001] The invention relates to the technical field of hydraulic engineering, in particular to the technical field of PCCP pipe prestressed carbon fiber reinforcement. Background technique [0002] The prestressed concrete cylinder pipe (Prestressed Concrete Cylinder Pipe, abbreviated as PCCP pipe) refers to the high-strength concrete core with a steel cylinder wound with a hoop prestressed steel wire, and then spraying a dense cement mortar protective layer on it. into water pipes. It is a composite pipe composed of thin steel plate, high-strength steel wire and concrete. It comprehensively exerts the tensile strength and easy sealing of steel and the compression and corrosion resistance of concrete. It has the characteristics of high sealing, high strength and high impermeability. Widely used It is widely used in long-distance water transmission lines, pressure inverted siphons, urban water supply projects, industrial pressurized water pipelines, sewer pip...

AI Technical Summary

Problems solved by technology

However, a large number of experimental studies and engineering practices have shown that the current carbon fiber reinforcement technology has some inherent defects. Because the elastic modulus of carbon fiber is much lower than its strength, it requires a large deformation to exert its strength, and it is difficult to suppress the deformation and cracks of the PCCP pipe structure. The development of PCCP pipes leads to insignificant reinforcement effect

For example, when the carbon fiber is at a lower stress level, the PCCP pipe concrete will crack or the prestressed steel wire will break, so that the high strength advantage of the carbon fiber material cannot be effectively exerted.

These defects greatly reduce the effect of carbon fiber reinforcement on PCCP pipes

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