Method for repairing and constructing trenchless large caliber water feeding penstock

A water supply pressure and pipeline repair technology, which is applied to pipe components, pipes/pipe joints/fittings, mechanical equipment, etc., can solve the problems of inconvenient connection of branch pipes, affecting construction quality, and large loss of hot water, etc., and achieves light weight, The effect of mature construction technology and small resistance to conveying liquid

Active Publication Date: 2008-01-23
上海水务建设工程有限公司
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Problems solved by technology

However, there are still some shortcomings in the existing trenchless pipeline repair methods, such as the patent No. ZL200410054201.6 "pipeline non-excavation reverse reverse lining repair technology", its obvious shortcomings such as: impregnation with thermosetting materials Large-diameter

Method used

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with embodiments.

[0034] This embodiment is the repair construction of a water supply pipeline with a diameter of 900 mm. The inner lining pipe is a glass fiber reinforced plastic sand pipe and A3 steel pipe. The inner lining pipe has a diameter of 800 mm. The specific construction method and steps are as follows:

[0035] a. Excavate and make work pits, cut the damaged pipelines that need to be repaired, and drain the water in the tunnels;

[0036] b. Use digital imaging pipeline inspection equipment to inspect the situation in the old pipeline;

[0037] c. Develop a pipe scraping plan based on the inspection and understanding of digital imaging pipeline inspection equipment;

[0038] d. Use a dedicated pipe scraper to remove the rust, scale and bumps in the old pipe;

[0039] e. Use a dedicated pipe cleaner to remove dirt, rust and garbage in the pipe;

[0040] f. Use digital imaging pipeline inspectio...

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PUM

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Abstract

The invention provides a construction method for repairing a pressure water supply pipe with big diameter without excavating. The method comprises such procedures as clearing scale in the old pipe, laying an inner lining pipe, connecting, inspecting and pressure testing the pipe, etc. The method is characterized in that, the laying of the inner lining pipe is to pass a glass steel & sand pipe and a steel pipe in diameter slightly smaller than that of the former mother pipe into the former mother pipe, a glass steel & sand pipe is used at pipe section without branch, and a steel pipe is used at pipe section needing branch; between the inner lining pipe sections, a joint of sealing and connecting function is provided. The construction method in the invention is relatively simple, the process is mature, economic and practical, and a repaired pipe has the advantages of the small resistance in delivering liquid, the good resistance to corrosion, the long service life and the no water pollution.

Description

Technical field [0001] The invention relates to a non-excavation repair method for a water supply pressure pipeline, in particular to a construction method for laying a "pipe-in-pipe" in a large-diameter water supply pressure pipeline to repair a damaged pipeline. Background technique [0002] Due to the impact of ground vehicle vibration, poor pipeline foundation and corrosion, underground pipelines will have cracks, breakages, pipe joint misalignment and pipe corrosion, so timely repairs are needed. [0003] The common slotted pipeline repair construction method needs to "open the intestines" to the road. This construction method not only has a long construction period and high cost, but also has a great impact on traffic, and generates a large amount of waste, which is harmful to the living environment , The repair construction of large-caliber water supply pressure pipes has a particularly serious impact on roads, traffic and the environment. [0004] The trenchless pipeline ...

Claims

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Application Information

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IPC IPC(8): F16L55/162
Inventor 陶伟元蔡燕飞顾卫东王伟杨达伟戴炼炼张艳蒋炜
Owner 上海水务建设工程有限公司
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