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Double-pipe sinking construction method and heating pipeline system

A construction method and immersed pipe technology, applied in the direction of pipes/pipe joints/pipes, pipe laying and maintenance, mechanical equipment, etc.

Active Publication Date: 2021-05-18
CHINA ELEVENTH CHEM CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the way of laying pipelines in trenches using the immersed tube method is mostly single-tube immersed tube construction, which cannot meet the requirements for laying water supply and return double pipes in heating projects

Method used

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  • Double-pipe sinking construction method and heating pipeline system
  • Double-pipe sinking construction method and heating pipeline system
  • Double-pipe sinking construction method and heating pipeline system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] see Figure 1 to Figure 3 As shown, the double-pipe immersed pipe construction method provided by the application includes the following steps:

[0039] Step 1: Construction technical preparation;

[0040] Step 2: cleaning of work belt and construction of cofferdam;

[0041] Step 3: pipeline transportation and layout;

[0042] Step 4: pipe group butt welding;

[0043] Step 5: Non-destructive testing;

[0044] Step 6: Repair the mouth and damage of the pipeline;

[0045] Step 7: Excavating pipe trenches and sinking pipe groups;

[0046] Step 8: Backfilling the pipe trench;

[0047] Step 9: Landform Restoration.

[0048] Among them, in the steps of excavating pipe trenches and sinking pipe groups, it is different from the step of excavating and laying on both sides of the pipe at the same time in the construction of single-pipe immersed pipes. Excavate the immersed pipe on one side, then repeat the above operation for the other pipe. If double-pipe immersed pipe ...

Embodiment 2

[0061] The double-tube immersed pipe construction method in the second embodiment is an improvement on the basis of the above-mentioned embodiment. The technical content disclosed in the above-mentioned embodiment will not be described repeatedly, and the content disclosed in the above-mentioned embodiment also belongs to the content disclosed in the second embodiment. .

[0062] In the optional solution of this embodiment, when the distance between the first pipe and the second pipe is not allowed to deviate, it is necessary to use pipe clips to fix the first pipe and the second pipe. And the pipe clamp can adjust the distance between the first pipe and the second pipe so that the distance can meet the requirement. Specifically, the distance between the closest points on the outer surfaces of the first pipe and the second pipe arranged side by side is 500mm.

[0063] In the optional scheme of this embodiment, in step 4, the assembly of pipelines is carried out in strict acco...

Embodiment 3

[0082] Embodiment 3 of the present application provides a heating pipeline system, which is obtained by adopting the double-pipe immersed pipe construction method of any one of the above-mentioned embodiments, and can meet the requirement of double-pipe circulation of water supply and return water in heating projects.

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Abstract

The invention relates to the technical field of pipeline construction, in particular to a double-pipe sinking construction method and a heating pipeline system. The double-pipe sinking construction method comprises the following steps of 1, preparing a construction technology; 2, cleaning an operation zone and building a cofferdam; 3, transporting and arranging pipelines; 4, assembling and welding the pipelines; 5, conducting nondestructive testing; 6, repairing pipeline orifices and damage; 7, digging pipe ditches and sinking a pipeline set, including the steps of placing the first pipeline and the second pipeline at preset positions in a spaced mode, digging one pipe ditch in the side, away from the second pipeline, of the first pipeline to a first preset depth so as to enable the first pipeline to sink under gravity, and digging the other pipe ditch in the side, away from the first pipeline, of the second pipeline to a first preset depth so as to enable the second pipeline to sink under gravity to be flush with the first pipeline; 8, backfilling the pipe ditches; and 9, restoring the landform. According to the scheme, single-side digging is conducted on each of the two sides of the pipeline set, the sinking process is convenient to control, and the pipeline sinking position is more accurate.

Description

technical field [0001] The present application relates to the technical field of pipeline construction, in particular to a double-pipe immersed pipe construction method and a heating pipeline system. Background technique [0002] The central heating method with combined heat and power as the heat source has become the main way of urban heating and heating. The distance from the thermal power plant to the urban area is generally 10-50km, and the primary network laying of thermal pipelines is an important link in the construction of central heating projects. [0003] For the terrain where the groundwater is very rich, clear water can be seen on the surface, or the underground is quicksand or sandy soil, the pipe trench cannot be formed, and the immersed pipe method is required to lay the pipe in the trench. In the prior art, the way of laying pipelines in the ditch using the immersed tube method is mostly single-tube immersed tube construction, which cannot meet the requiremen...

Claims

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Application Information

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IPC IPC(8): F16L1/036F16L1/06F16L1/09
CPCF16L1/036F16L1/06F16L1/09Y02E10/10
Inventor 叶晓辉卢铮张永昌刘冰赵慧霞任国义张洪超
Owner CHINA ELEVENTH CHEM CONSTR
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