Glass fiber reinforced plastic prestressed concrete cylinder pipe (PCCP) and manufacturing method thereof

Abstract

The invention discloses a glass fiber reinforced plastic prestressed concrete cylinder pipe (PCCP) with media inside and outside a pipeline all being corrosive media. The manufacturing method includes the steps that a glass fiber reinforced plastic inside liner is formed by vinyl resin soaked fibers in a winding mode; a vertical type pouring technology is adopted in a resin mortar layer, and quartz sand particles and phthalateunsaturated polyester resin are mixed and stirred and then are poured into a cavity between the glass fiber reinforced plastic inside liner and a steel sleeve to be formed in a vibration molding mode; a concrete structural layer is poured into a cavity between the steel sleeve and a concrete structural layer outer mold by the adoption of the vertical type pouring technology to be formed in a vibration molding mode; a glass fiber reinforced plastic prestressed layer is formed by the way that fiber glass filaments soaked by the phthalate unsaturated polyester resin are manufactured and laid outside the concrete structural layer through a winding technology. Compared with a glass reinforced plastic pipe, the ring stiffness can be improved by 10 times, the cost is lowered by 20%, the rough rate coefficient is 45% smaller than that of a PCCP, and the defects that the stiffness of a fiber reinforced plastic pipe is low, the cost of the fiber reinforced plastic pipe is high, the PCCP can not achieve corrosion resistance, pipe explosion can happen easily and the hydraulic characteristic is poor are overcome.

Description

technical field [0001] The invention relates to a glass fiber reinforced plastic prestressed steel sleeve concrete pipe suitable for corrosive media inside and outside the pipe and a manufacturing method thereof. Background technique [0002] At present, the most used pipes in water supply and drainage projects are prestressed steel sleeve concrete pipes (PCCP pipes) and glass fiber reinforced plastic pipes. For example, in the South-to-North Water Diversion Project, the main water delivery pipes are these two pipes. [0003] PCCP pipe has the characteristics of high rigidity, high strength and relatively low cost. But at present, even in fresh water transportation, PCCP pipes have two defects: (1) The outer protective layer of cement mortar has poor impermeability, and the prestressed steel wire is easy to rust. Once any part of the steel wire is rusted and broken, the entire pipe will be damaged. Sudden collapse caused pipe bursts, and maintenance is more difficult than o...

AI Technical Summary

Problems solved by technology

But at present, even in fresh water transportation, PCCP pipes have two defects: (1) The outer protective layer of cement mortar has poor impermeability, and the prestressed steel wire is easy to rust. Once any part of the steel wire is rusted and broken, the entire pipe will be damaged. Sudden collapse caused pipe bursts, and maintenance is more difficult than other pipes. For example, five consecutive pipe burst accidents occurred in the "Great Artificial River" project in Libya. The cause of the accident was that chlorides caused the corrosion of the prestressed steel wire of the PCCP pipe; (2 ) The roughness coefficient of the inner wall of the concrete is relatively high, and the hydraulic characteristics are poor, which has a certain impact on the flow of the pipeline

When the internal and external media of the pipeline are corrosive media, such as seawater desalination projects, the above two conventional pipelines have defects in use

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