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Method for diagnosing and repairing low-temperature unfrozen defect caused by soft and hard interface freezing pipe fracture

A repair method, a technology of freezing pipes, which is applied in the field of low-temperature unfrozen defect detection, which can solve the problems of low-temperature unfrozen defects that are difficult to quickly and accurately repair, the temperature at the fracture site of the frozen pipe fracture cannot be accurately monitored, and the pressure of leaked brine seeping into soft-hard composite formations is difficult to monitor And other issues

Pending Publication Date: 2021-11-19
CHINA TUNNEL CONSTR GUANGDONG +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a detection device and method for the low-temperature unfrozen defects caused by the fracture of the frozen tube at the soft-hard interface, so as to solve the problem that the volume of the low-temperature unfrozen defect caused by the fracture of the frozen tube at the soft-hard interface is difficult to detect, and the leakage of salt water seeps into the soft It is difficult to monitor the pressure of the hard composite formation, the temperature at the fracture site of the frozen pipe fracture cannot be accurately monitored, and it is difficult to quickly and accurately repair the low-temperature unfrozen defects caused by the fracture of the frozen pipe at the soft-hard interface

Method used

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  • Method for diagnosing and repairing low-temperature unfrozen defect caused by soft and hard interface freezing pipe fracture
  • Method for diagnosing and repairing low-temperature unfrozen defect caused by soft and hard interface freezing pipe fracture
  • Method for diagnosing and repairing low-temperature unfrozen defect caused by soft and hard interface freezing pipe fracture

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Experimental program
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Effect test

Embodiment 1

[0056] Diagnose the low-temperature unfrozen defects caused by the fracture of the frozen pipe at the soft-hard interface and repair devices, including: fiber grating temperature measurement system, dynamic water drainage and seepage pressure detection system, permafrost gap volume detection system, and repair freezing system.

[0057] like figure 1 The above-mentioned systems shown schematically are used as devices, and the above-mentioned systems should be installed and integrated in a hard protective case in practical application.

[0058] The first part of the subsystem: fiber grating temperature measurement system

[0059] As an example, figure 1 The medium fiber grating temperature measurement system includes a first optical fiber 101, a second optical fiber 102, a third optical fiber 103, a fourth optical fiber 104, a first grating 105, a second grating 106, a fiber grating encapsulant 107, a fiber grating connecting line 108, an optical fiber Raster controller 109 . ...

Embodiment 2

[0081] Step 1, prefabrication stage

[0082] In the stratum interface of the excavated subway tunnel, each frozen pipe 501 of the frozen pipe system is arranged, and the stratum interface involves the concrete segment 701, the rock layer 702, the soft soil layer 703, the concrete segment-rock interface 704, and the rock-soft soil interface 705; Prefabricated fiber grating temperature measurement system, power water cleaning and drainage and seepage pressure detection system, and permafrost gap volume detection system under each freezing pipe 501 of the freezing pipe system;

[0083] Prefabricate and repair the freezing system under each freezing pipe 501 of the freezing pipe system;

[0084] Each freezing pipe of the freezing pipe system is prefabricated with a flow sensor 502 and a liquid storage separation tank 503;

[0085] Step 2, Probing Phase

[0086] 2.1 Run the first part of the subsystem: fiber grating temperature measurement system

[0087] Fiber optics are laid a...

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Abstract

The invention provides a method for diagnosing and repairing a low-temperature unfrozen defect caused by soft and hard interface freezing pipe fracture. The method comprises a prefabrication stage, a detection stage and a repair stage, and a fiber bragg grating temperature measurement system, a power water cleaning and draining and seepage pressure detection system, a frozen soil gap volume detection system and a freezing repair system are operated. The method has the advantages that the volume of the low-temperature unfrozen defect caused by the soft and hard interface freezing pipe fracture is rapidly detected, the saline leakage pressure is accurately detected, the temperature of a soft and hard stratum interface easy-to-break pipe is accurately monitored, and the low-temperature unfrozen defect caused by the soft and hard interface freezing pipe fracture is rapidly repaired.

Description

Technical field [0001] The invention relates to the field of detecting low-temperature unfrozen defects caused by the leakage of salt water caused by the fracture of frozen pipes in soft and hard strata of subways. Background technique [0002] The freezing method of construction in soft and hard composite strata can easily cause the frozen pipe to break, causing the leakage of salt water, causing high-concentration salt water to gradually dissolve into the pores and fissures of the surrounding soft soil layers, rock layers and other unevenly soft and hard rock and soil bodies. In the water, the salt content of free water in soft and hard formations increases sharply, causing the freezing temperature of the brine in soft and hard formations to drop, forming low-temperature unfrozen defects and triggering secondary disasters. [0003] The current emergency treatment methods after the frozen pipe breaks mainly include extending the freezing time to strengthen the freezing effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/08E21D11/00E21F17/18E21F16/02
CPCE21D9/001E21D11/08E21D11/00E21F17/18E21F16/02
Inventor 易觉弓毅伟范秀江吕明豪朱劲锋牟军东邹宝平董涛詹海鸿李奕张玉亮陈杰华李强赵胜利姜叶翔羊逸君马笑遇邝光霖叶怡珺陈泉林
Owner CHINA TUNNEL CONSTR GUANGDONG
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