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Post-grouting expansive underground pipeline joint plugging structure

An underground pipeline, expansive technology, applied in the direction of pipes/pipe joints/pipe fittings, pipes, landfill technology, etc., can solve the problems of easy cracking of joints, uneven settlement, leakage, etc. Simple structure and convenient installation

Pending Publication Date: 2022-08-05
CHINA FIRST METALLURGICAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different structural foundation forms of pipelines and inspection wells, there will be uneven settlement, joints are prone to cracking, and leakage occurs

Method used

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  • Post-grouting expansive underground pipeline joint plugging structure
  • Post-grouting expansive underground pipeline joint plugging structure
  • Post-grouting expansive underground pipeline joint plugging structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0033] The difference from Embodiment 1 is that a pressure sensor is arranged in the cavity, and the pressure sensor transmits the collected pressure to the controller. When the pressure decreases to a certain value, the controller transmits the alarm information to the alarm device. In order to deal with leakage problems in a timely manner.

[0034] The invention is applied to the joint positions of underground drainage (sewage) pipelines and inspection wells to fill the gaps between pipelines and reserved holes. After the injected slurry solidifies, the strength will be further improved, and there will be no leakage after plugging, high durability, and deformation coordination ability. powerful.

Embodiment 3

[0036] A method for plugging a post-grouting expansive underground pipeline joint, the method adopts the post-grouting expansive underground pipeline joint of Embodiment 1 or Embodiment 2 to block, and the method comprises the following steps:

[0037] 1. Determine the size of the flexible pipe body 1 according to the size of the pipe (the inner diameter D of the flexible pipe body 1 is determined according to the size of the pipe);

[0038] 2. Set the flexible pipe body 1 on the outer wall of the pipeline 5 and install it in the reserved hole of the inspection well 4 together;

[0039] 3. Through the grouting hole 2, inject the slurry into the inner cavity 3. Under the action of pressure, the flexible pipe body 1 fills the gap between the pipe 1 and the wall of the hole;

[0040] 4. Detect the reliability of filling and plugging, and determine whether secondary pressure grouting is required;

[0041] 5. After the slurry solidifies, the plugging is completed.

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Abstract

The post-grouting expansive underground pipeline joint plugging structure comprises an annular expansion pipe, the inner wall of the annular expansion pipe makes contact with a pipeline, and the outer wall of the annular expansion pipe makes contact with the well wall of a water inlet and / or a water outlet of an inspection well; the annular expansion pipe comprises a flexible pipe body and a grouting opening, a cavity is formed in the flexible pipe body, the grouting opening is formed in the flexible pipe body, and pressurized grout is injected into the cavity through the grouting opening, so that the gap between the inspection well and the pipeline is filled with the flexible pipe body. The post-grouting expansion type plugging technology is adopted, and the problem of joint leakage can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of pipeline plugging, and in particular relates to a post-grouting expansion underground pipeline joint plugging structure. Background technique [0002] With the process of urbanization, the large-scale increase of urban population, and the stricter requirements for environmental protection and emission control, the level of underground pipeline construction and system control requirements have been continuously improved. The existing underground drainage (sewage) pipelines and inspection wells are blocked by using cement mortar to block and spread evenly. Due to the different structural foundations of pipelines and inspection wells, uneven settlement will occur, joints are prone to cracking, and leakage occurs. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a post-grouting expansion underground pipeline joint plugging structure, which adopts the post-grouting expans...

Claims

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Application Information

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IPC IPC(8): F16L5/02
CPCF16L5/02Y02W30/30
Inventor 杨乾辉余巍蔡婷王瑶
Owner CHINA FIRST METALLURGICAL GROUP
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