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Method for repairing trenchless coating lining of large-diameter drainage pipeline

A technology for drainage pipes and repair methods, which is applied in the direction of pipe components, pipes/pipe joints/fittings, mechanical equipment, etc., which can solve problems such as prominent safety risks, large environmental pollution, and pipe leakage, and achieve small safety risks and resource investment Less, the effect of improving the tensile strength

Active Publication Date: 2021-03-02
中国水利水电第七工程局成都水电建设工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention aims to solve defects such as pipeline leakage, corrosion, and disjoint, and avoid problems such as large environmental pollution and prominent safety risks caused by excavation and repair construction. It is aimed at pipelines without structural damage or potential corrosion leakage hazards. Conservative pre-rehabilitation of pipelines provides a repair method

Method used

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  • Method for repairing trenchless coating lining of large-diameter drainage pipeline

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Embodiment Construction

[0035] The present invention is further described below in conjunction with specific embodiment, and specific embodiment is the further description of the principle of the present invention, does not limit the present invention in any way, and the identical or similar technology of the present invention all does not exceed the scope of protection of the present invention.

[0036] In conjunction with the accompanying drawings.

[0037] The non-excavation coating lining repair method for large-diameter drainage pipelines includes the following steps:

[0038] (1) Construction preparation: Before the official construction, it is necessary to go through the administrative approval procedures for road-occupying construction, and carry out traffic evacuation and construction site layout according to the approval situation.

[0039] (2) Ventilation detection: Set up a blower fan and an exhaust fan at the two wellheads of the construction section to continuously supply air and ventil...

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Abstract

The invention discloses a method for repairing a trenchless coating lining of a large-diameter drainage pipeline. The method comprises the steps of pre-construction preparation, repairing constructionand construction quality detection. The method specifically comprises the steps of construction preparation, ventilation detection, pipeline plugging, construction guide and drainage, pipeline dredging, repair point interpretation, in-pipe grouting, interface crack treatment, interface surface treatment, coating repairing construction, edge sealing maintenance, quality inspection and site cleaning. According to the method, a two-component composite waterproof film coating material is formed by a high-molecular polymer emulsion and inorganic powder, so that a high-strength tough waterproof film is formed, and the double advantages of high elasticity of an organic material and good durability of an inorganic material are achieved; a fiberglass mesh layer is additionally arranged, so that the overall tensile strength of the waterproof film can be greatly improved; and a three-base-layer construction process is adopted and comprises bottom layer construction, mesh laying and surface layerconstruction, and the three-base-layer construction process has the advantages that a repaired base layer is firm, and covering and combining are stable.

Description

technical field [0001] The invention relates to the technical field of drainage pipeline repair construction, in particular to a non-excavation coating lining repair method for large-diameter drainage pipelines. Background technique [0002] With the rapid development of urban construction, the number of various public underground pipelines and the scale of structures are also expanding, and the available underground space is getting smaller and smaller, especially for old urban areas that have been built and have no large-scale comprehensive renovation plan. The laying of drainage pipes is becoming more and more difficult. At the same time, with the passage of time, structural defects such as misalignment, leakage, and corrosion of the original pipes have become more and more serious. It will become inevitable in the process of urban development to deal with them accordingly. choose. If the traditional slotting construction method is used for pipeline replacement, it will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/16F16L55/175
CPCF16L55/16F16L55/175
Inventor 李春雷张立军付祖俊胡荣华王建军石叶秦慧程赵全峰范维维徐谦何彪郑良邱涛冯均才邓成冬吴娜陈昱弛胡长令徐晶钟毅贾东浩陈章
Owner 中国水利水电第七工程局成都水电建设工程有限公司
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