Method for repairing and reinforcing underground round large pipeline by utilizing fiber cloth composite material

Abstract

The invention discloses a method for repairing and reinforcing an underground round large pipeline by utilizing a fiber cloth composite material and belongs to the technical field of reinforcement of underground pipelines. The method comprises the following steps: (1) firstly, cleaning and washing defects of an inner wall of the round large pipeline and an original anticorrosive material; (2) secondly, polishing and repairing the defects of the inner wall of the pipeline; (3) then sticking and anchoring a crescent-shaped block material to a corresponding part of the inner wall of the pipeline and modifying a round cross section of the inner wall of the pipeline to an oval cross section; and (4) finally, sticking the fiber cloth composite material for reinforcing on the inner wall of the pipeline along the annular direction by utilizing a humid and cured toxin-free epoxy resin adhesive. According to the method disclosed by the invention, the round pipeline is modified into the oval pipeline; the bearing force of the oval pipeline is greater than that of the round pipeline and the curvature of the lower part of the cross section of the oval pipeline is small, so that a water flow speed is rapid and solid matters in the pipeline are easy to wash away, and the probability of blocking the pipeline is reduced.

Description

technical field [0001] The invention relates to a method for repairing and strengthening an underground circular large pipeline with a fiber cloth composite material, and belongs to the technical field of underground pipeline reinforcement. Background technique [0002] my country's water resources are short, and the per capita water resources are about 2,100 cubic meters, which is a quarter of the world's average level. However, recent statistics for 408 large and medium-sized cities in China show that the average leakage rate of their water supply systems is 21.5%, and the highest leakage rate is over 70%, which is a huge waste of water resources. In developed countries, the pipeline network leakage rate has long been lower than 10%, for example, in Osaka, Japan, it was 6.6% in 1990. Due to the rapid urbanization construction in China for many years, the urban population has increased rapidly, the pressure of water supply pipes has increased, the bearing capacity of pipe ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for repairing and strengthening underground large circular pipelines with fiber cloth composite materials. The bearing capacity of the pipe wall cannot be significantly improved, and the degree of reinforcement is limited

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