Method for repairing large-diameter concrete water supply pipeline

A technology for water supply pipes and concrete, applied in the direction of pipe components, pipes/pipe joints/fittings, mechanical equipment, etc., to facilitate transportation, ensure construction effects, and reduce hollowing

Active Publication Date: 2014-01-29
CHINA THREE GORGES CORPORATION +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for repairing large-diameter concrete water supply pipes, which

Method used

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  • Method for repairing large-diameter concrete water supply pipeline
  • Method for repairing large-diameter concrete water supply pipeline
  • Method for repairing large-diameter concrete water supply pipeline

Examples

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Embodiment 1

[0036] A method for repairing a large-diameter concrete water supply pipeline. Firstly, after the large-diameter concrete water supply pipeline 1-1 is shut off, enter the pipeline through an inspection hole, conduct a detailed inspection of the water leakage, determine the repair location, and formulate a repair plan;

[0037] Then select an appropriate location on the large-diameter concrete water supply pipeline 1-1 (taking into account transportation, grouting and other factors) and excavate the working pit 3-1 in sections. The specific size of the working pit 3-1 can meet the steel liner section 2 The hoisting and transportation of -1 shall prevail; and the inner wall of the large-diameter concrete water supply pipeline 1-1 to be repaired shall be chiseled, rinsed with wind and water, and pretreated at concentrated or obvious leaking parts (use plugging agent or The grouting method is used to seal the water leakage, and the aqueduct is buried to lead the water into the stee...

Embodiment 2

[0047]A method for repairing a large-diameter concrete water supply pipeline. Firstly, after the large-diameter concrete water supply pipeline 1-1 is shut off, enter the pipeline through an inspection hole, conduct a detailed inspection of the water leakage, determine the repair location, and formulate a repair plan;

[0048] Then select an appropriate location on the large-diameter concrete water supply pipeline 1-1 (taking into account transportation, grouting and other factors) and excavate the working pit 3-1 in sections. The specific size of the working pit 3-1 can meet the steel liner section 2 The hoisting and transportation of -1 shall prevail; and the inner wall of the large-diameter concrete water supply pipeline 1-1 to be repaired shall be chiseled, rinsed with wind and water, and pretreated at concentrated or obvious leaking parts (use plugging agent or The grouting method is used to seal the water leakage, and the aqueduct is buried in the larger water leakage part...

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Abstract

A method for repairing a large diameter concrete water-supply pipe; firstly checking the water leakage situation of a large diameter concrete water-supply pipe (1-1), then roughening and scouring the concrete surface of a pipe section to be repaired, and excavating a working pit (3-1) for the segment. The method comprises the following steps: (1) disposing a plurality of steel liner pipe sections (2-1) in the large diameter concrete water-supply pipe (1-1); (2) assembling and welding the plurality of steel liner pipe sections (2-1) section by section to form a steel liner pipe (1-2), and fixing the steel liner pipe (1-2) to the wall of the large diameter concrete water-supply pipe (1-1); (3) arranging a plurality of grouting holes (3-4) and a plurality of water drainage and ventilation holes (3-5) in the steel liner pipe (1-2), plugging the ends of the steel liner pipe (1-2) while reserving a plurality of grouting observation holes (3-9); (4) grouting the segment; and (5) plugging the working pit (3-1), then conducting a test by running water through to check the repair result. The above method facilitates construction, has a low cost, and is durable, safe and reliable.

Description

technical field [0001] The invention relates to a method for repairing water leakage of concrete pipelines, in particular to a method for repairing large-diameter concrete water supply pipelines in water conservancy and hydropower projects. Background technique [0002] After the concrete water supply pipeline has been in operation for a certain period of time, due to various reasons, water leakage occurs to varying degrees, which has a certain impact on the quality of water supply; when the water leakage is serious, it may also seriously threaten the safety of water supply and must be repaired. At present, the commonly used concrete water supply pipeline repair methods usually include traditional lining method, interspersed lining method, composite material flipping lining method and coating method. [0003] The traditional lining method, also called the intubation method, is the earliest non-excavation underground pipeline repair method, which is suitable for the repair of...

Claims

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Application Information

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IPC IPC(8): F16L55/164
CPCF16L55/16455F16L55/1652
Inventor 陈先明王宗敏张雪峰丁家仁王永平刘宣进
Owner CHINA THREE GORGES CORPORATION
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