Steel-pipe-insertion local strengthening trenchless repair method for drainage pipeline with large pipe diameter

Abstract

Aiming at the problem existing in the current method for repairing a mountain city pipeline and the inadaptability of a method for repairing a drainage pipeline with large pipe diameter, the invention provides a steel-pipe-insertion local strengthening trenchless repair method for a drainage pipeline with large pipe diameter. In the method, one steel pipe is inserted into a pipeline to be repaired at a distance, and the upper side of the middle of a steel casing pipe is additionally provided with a crescent rib to improve the strength. When used by matching with a coating repair method, the method can be used for non-structural repair of the pipeline and can also be used for structural repair of the pipeline. The method is more convenient for construction without large-scale construction equipment, materials are saved, and the repair price is cheep. The method is suitable for repairing the pipeline with a pipe diameter of more than 800mm.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a repair technology for large-diameter drainage pipes. Background technique [0002] Rupture and collapse of urban drainage pipes in mountainous areas are common due to changes in working conditions and long-term sewage corrosion. The transformation caused problems such as huge changes in the thickness of the overlying soil layer, vehicle load, and pipe quality, and the problem of pipe damage was more prominent. In contemporary cities, the underground pipe network is becoming more and more complex, the urban road traffic is heavy, and the excavation of drainage pipes has a serious impact on the lives of citizens. There is an urgent need for rapid repair technology of underground drainage pipes without excavation. However, drainage pipes in mountainous cities are often buried deep and the construction distance is small. Many non-excavation rapid repair techno...

AI Technical Summary

Problems solved by technology

However, the drainage pipes in mountainous cities are often buried deep and the construction distance is small. Many non-excavation rapid repair technologies applicable to plain cities are not applicable to mountainous cities or the repair cost is greatly increased.

For example, the original solidified hose lining repair method widely used in foreign countries requires large-scale construction equipment, and the main raw materials rely on imports, so the repair cost itself is very high. However, many drainage pipes in mountainous cities are located in places with inconvenient transportation, and large-scale construction equipment is difficult to reach.

The high-density polyethylene pipe lining method requires the excavation of a large working pit, the construction cost is high, and it affects traffic, so it is not suitable for the repair of large buried deep pipelines

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