A kind of fabric reinforced concrete-steel pipe-frp composite pipe and its manufacturing method

Abstract

The invention discloses a fabric-reinforced concrete-steel pipe-FRP composite pipe, which comprises an FRP round pipe coaxially arranged from inside to outside, a thin-walled steel pipe, and fabric-reinforced concrete, and fine particles are poured between the FRP round pipe and the thin-walled steel pipe Concrete; the outer surface of the interface is provided with a steel collar through a stud, and a sealing rubber pad is provided under the steel collar. In the present invention, the inner layer of the pipe is made of resin fiber reinforced material, which has the advantages of corrosion resistance, fatigue resistance, and light weight. The inner wall of the formed pipe is smooth, does not grow microorganisms, has a large water flow, and has a long service life, which reduces the later maintenance cost. ;Because the steel pipe is used in the middle interlayer, the composite pipe has higher pressure bearing capacity and greater rigidity; the fabric reinforced concrete on the outer layer has a further restraint effect on the inner steel pipe and FRP, which makes the pressure bearing capacity and compression resistance of the pipe The capacity is further enhanced, and the fabric reinforced concrete has good corrosion resistance and impermeability, making the service life of the pipe longer.

Description

technical field [0001] The invention relates to a fabric-reinforced concrete-steel pipe-FRP composite pipe and a manufacturing method thereof, belonging to the technical field of pipe materials. Background technique [0002] With the continuous development of cities and the continuous improvement of environmental protection requirements, buried water pipelines, drainage and sewage pipelines are widely used in urban underground pipe networks. The traditional reinforced concrete pipe wall is relatively rough, and it is easy to adhere to the polluting liquid. Long-term use will reduce the flow area of ​​the pipe and increase the resistance between the liquids. In addition, concrete pipelines are prone to water seepage, poor sealing, and prone to corrosion problems during use, and the corrosion method is chronic corrosion, which is not easy to be discovered by inspectors. Another type of stress corrosion cracking is to make the pipeline under corrosion, tension When the stress ...

AI Technical Summary

Problems solved by technology

However, during the use of this kind of composite pipe, due to the effect of the vehicle load, the buried pipe may cause cracks or increase the cracks of the composite pipe due to excessive pressure, which will affect the normal use of the pipe, and then affect people's daily life.

In addition, this kind of pipe is also prone to technical problems such as corrosion problems, poor corrosion resistance, and short service life.

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