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Pipe Curtain Freezing Method Supporting Structure and Its Construction Method

A technology of support structure and construction method, which is applied in earthwork drilling, wellbore lining, tunnel lining, etc. It can avoid problems such as body disturbance, and achieve the effect of omitting the positioning process, ensuring the safety of construction and operation, and improving the freezing efficiency.

Active Publication Date: 2018-08-21
CHINA RAILWAY TIMES BUILDING DESIGIN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this pipe curtain method is: when the pipe curtain jacking distance is long, the steel pipe will inevitably rotate during the jacking process, and the lock is more likely to break, resulting in water-stop failure; There is a certain disturbance of the soil in the middle, which is not conducive to the sealing of the opening of the pressure-maintaining and drag-reducing mud outside the pipe.

Method used

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  • Pipe Curtain Freezing Method Supporting Structure and Its Construction Method
  • Pipe Curtain Freezing Method Supporting Structure and Its Construction Method
  • Pipe Curtain Freezing Method Supporting Structure and Its Construction Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: with reference to attached figure 1 . A pipe curtain freezing method support structure, which includes a plurality of pipe curtain steel pipes 2 (also known as jacking pipes) and freezing pipes 3; the diameter of the pipe curtain steel pipes 2 is 0.3m to 2m, and the plurality of pipe curtain steel pipes 2 are rectangular or circular layout; the freezing pipe 3 is arranged between the adjacent pipe curtain steel pipes 2, and the frozen soil curtain 4 is formed by the freezing pipe 3 between the adjacent pipe curtain steel pipes 2, that is, after the freezing pipe 3 is actively frozen, the freezing pipe 3 3. The original soil 1 between the outer pipe curtain steel pipes 2 forms a frozen soil curtain 4; the separated pipe curtain steel pipes 2 are filled with concrete 5, that is, the pipe curtain steel pipes 2 are filled with concrete 5 at intervals; the pipe curtain steel pipes 2 can also be Grouting instead of concrete. The pipe curtain freezing method su...

Embodiment 2

[0034] Embodiment 2: with reference to attached figure 2 . A construction method of the pipe curtain freezing method support structure described in technical scheme 1, is characterized in that comprising the following steps:

[0035] ⑵ After the pre-preparation is ready, build the pipe jacking work well and the receiving well according to the working conditions;

[0036] (2) According to the project situation, select the pipe curtain steel pipe with an appropriate diameter, and use the pipe jacking method to lay out the pipe curtain steel pipe in a circular or rectangular manner. The jacking sequence of the pipe curtain steel pipe is symmetrical from bottom to top based on the central axis of the cross section;

[0037] ⑶ Arrange frozen pipes between adjacent pipe curtain steel pipes, and the number of frozen pipes is determined according to the distance between pipe curtain steel pipes;

[0038] ⑷ According to the requirements of working conditions, fill concrete in the st...

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Abstract

The invention relates to a pipe roof freezing method supporting structure and a construction method thereof. The pipe roof freezing method supporting structure comprises multiple pipe roof steel pipes and freezing pipes, wherein the multiple pipe roof steel pipes are arranged in a rectangular shape or in an annular shape; the freezing pipes are arranged between adjacent pipe roof steel pipes; frozen soil curtains are formed between the adjacent pipe roof steel pipes by the freezing pipes; and each pipe roof steel pipe is filled with concrete or concrete fills the portion between spaced pipe roof steel pipes. In the case of construction, a working shaft and an arriving shaft are firstly constructed, jacking of the steel pipes, arrangement of the freezing pipes, filling of the steel pipes and active freezing of the freezing pipes are then carried out, excavation while supporting is carried out in the supporting structure, and finally, after a complete inner structure is constructed, the supporting structure is removed. The pipe roof steel pipe supporting mode is combined with the frozen soil curtain supporting mode, a large-stiffness water tightness pipe roof freezing method supporting structure is formed, the number of the pipe roof steel pipes is greatly reduced, the frozen soil curtains are used for replacing the pipe roof steel pipes for supporting, the construction period and the cost are effectively saved, and stiffness of the supporting structure is greatly improved.

Description

technical field [0001] The invention relates to a pipe curtain construction project, in particular to a pipe curtain freezing method support structure and a construction method thereof. Background technique [0002] During the construction of underground connection channels, the usual method is: the jacked pipe curtain steel pipe is connected with the outer lock of the pipe, and after the pipe curtain is formed, water-stopping agent or mortar is injected into the lock to form a sealed water-stop pipe curtain; Under the protection of the pipe curtain support structure, after the soil inside the pipe curtain is reinforced, it is supported while excavating until the pipe curtain section is excavated and penetrated, and then the structure is poured. The disadvantage of this pipe curtain method is: when the pipe curtain jacking distance is long, the steel pipe will inevitably rotate during the jacking process, and the lock is more likely to break, resulting in water-stop failure;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/38E21D11/14E21D11/10
CPCE21D11/10E21D11/14E21D11/38
Inventor 胡俊张皖湘汪磊陈孟春冯松涛郑伟
Owner CHINA RAILWAY TIMES BUILDING DESIGIN INST CO LTD