A kind of in-situ thermoplastic forming lining pipe and its construction technology

Abstract

The invention discloses an in-situ thermoplastic forming lining pipe and a construction process. The in-situ thermoplastic forming lining pipe comprises an outer pipe. The outer pipe comprises a blocking layer and a supporting layer. The blocking layer is located on the outer side of the supporting layer and used for water prevention and corrosion prevention. The supporting layer comprises a fiberreinforced layer. A fiber network and thermosetting resin are included in the fiber reinforced layer. The fiber network is located in the thermosetting resin. A secondary curing layer is fixed to theinner side face of the supporting layer and comprises a light-cured resin layer and a thermoset resin layer, the thickness of the light-cured resin layer ranges from 0.2 mm to 1 mm, and the thicknessof the thermoset resin layer ranges from 0.5 mm to 2 mm. After the light-cured resin layer is hardened due to UV-irradiation, the round pipe form of the outer pipe can be supported. An inner pipe isfurther included and is made of a thermoset PVC or resin material, the outer diameter of the inner pipe is larger than the inner diameter of the inner pipe and the inner diameter of the outer pipe, and the difference value is 1 / 10-1 / 8 of the diameter of the outer pipe. The lining pipe can effectively support a pipeline and bear stress, and stress concentration can be avoided.

Description

technical field [0001] The invention relates to an inner lining pipe used for repairing an in-situ underground pipeline, in particular to a trenchless repairing lining pipe used for underground pipelines and a construction process. Background technique [0002] In-situ thermoplastic forming is the application of thermoplastic forming process on the engineering site to install the factory-produced liner on the inner wall of the pipeline to be repaired. The high strength of the liner can alone withstand all external loads of underground pipelines, including hydrostatic pressure, earth pressure, and traffic loads. Some products can be applied to the full structural repair of low-pressure pressure pipelines. Due to the excellent sealing performance of the pipeline, it can be used for the repair of high-pressure pressure pipelines when the strength of the main pipe of the high-pressure pipeline is not severely damaged. The non-excavation repairing process of in-situ thermoplast...

AI Technical Summary

Problems solved by technology

However, the condition of the original pipeline is mostly very bad, and breakage is a relatively common problem

The pressure of the liquid in the pipeline is high, which will form a stress concentration on the liner at the original pipeline. In the position of stress concentration, it is easy to cause damage to the liner

Images