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Device for diagnosing and repairing low-temperature unfrozen defect caused by breakage of freezing pipe at soft-hard interface

A defect diagnosis and freezing pipe technology, applied in safety devices, measuring devices, drainage and other directions, can solve the problem that the temperature of the fractured fracture position of the frozen pipe cannot be accurately monitored, the leakage of salt water into the soft and hard composite formation pressure is difficult to monitor, and the low temperature unfrozen defect is difficult. Quick and accurate repairs, etc.

Pending Publication Date: 2021-12-14
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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  • Device for diagnosing and repairing low-temperature unfrozen defect caused by breakage of freezing pipe at soft-hard interface
  • Device for diagnosing and repairing low-temperature unfrozen defect caused by breakage of freezing pipe at soft-hard interface
  • Device for diagnosing and repairing low-temperature unfrozen defect caused by breakage of freezing pipe at soft-hard interface

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 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.

[0040] Such as 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.

[0041] The first part of the subsystem: fiber grating temperature measurement system

[0042] 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

[0064] Step 1, Prefabrication Stage

[0065] 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;

[0066] Prefabricate and repair the freezing system under each freezing pipe 501 of the freezing pipe system;

[0067] Each freezing pipe of the freezing pipe system is prefabricated with a flow sensor 502 and a liquid storage separation tank 503;

[0068] Step 2, Probing Phase

[0069] 2.1 Run the first part of the subsystem: fiber grating temperature measurement system

[0070] Fiber optics are laid a...

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Abstract

The invention provides a device for diagnosing and repairing a low-temperature unfrozen defect caused by breakage of a freezing pipe at a soft-hard interface. The device comprises a fiber bragg grating temperature measurement system, a power water cleaning and draining and seepage pressure detecting system, a frozen soil interstitial volume detection system and a freezing repairing system. The device has the advantages that the volume of the low-temperature unfrozen defect caused by breakage of the freezing pipe at the soft-hard interface is rapidly detected, saline leakage pressure is accurately detected, the temperature of an easy-to-break pipe at a soft-hard stratum interface is accurately monitored, and the low-temperature unfrozen defect caused by breakage of the freezing pipe at the soft-hard interface is rapidly repaired.

Description

technical field [0001] The invention relates to the field of detection of 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 construction of soft and hard composite strata can easily lead to the fracture of the frozen pipe, resulting in the leakage of brine, so that the high concentration of brine gradually dissolves in the pores and cracks of the surrounding soft soil layer, rock layer and other soft and hard uneven rocks and soils. In the water, the salt content of free water in soft and hard formations increases sharply, resulting in a drop in the freezing temperature of brine in soft and hard formations, forming low-temperature unfrozen defects, and causing secondary disasters. [0003] The current emergency treatment methods after the freezing pipe breaks mainly include methods such as prolonging the freezing time to enhance the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02E21F16/02
CPCG01D21/02E21F16/02
Inventor 董涛易觉邹宝平牟军东范秀江弓毅伟吕明豪詹海鸿朱劲锋张玉亮陈杰华叶怡珺陈泉林
Owner CHINA TUNNEL CONSTR GUANGDONG
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