Device for preventing medium around underground pipeline from collapsing

Abstract

The invention relates to a device for preventing a medium around an underground pipeline from collapsing, and belongs to the technical field of underground pipeline defect prevention, and diagnosis and treatment. The device mainly comprises a fixing chain, fixing supports, geotechnical cloth, a reverse filter layer and lock catches, wherein the fixing supports are located on the inner side of thefixing chain and are connected with the fixing chain, the reverse filter layer wrapped in the geotechnical cloth is arranged between the fixing supports, and the lock catches are arranged at the two ends of the fixing chain. The device for preventing the medium around the underground pipeline from collapsing is installed on the periphery of the underground pipeline, the geotechnical cloth and thereverse filter layer are arranged on the device, so that when a leakage point occurs in the pipeline, only water is allowed to flow back and forth around the pipeline, and solid particles are prevented from being lost. According to the device, when the leakage point and water leakage of the underground pipeline occur, surrounding soil bodies and other media are guaranteed not to be lost along withflowing of the water, so that the device plays an essential role in protection of the underground pipeline and a road, a bridge and a building above the pipeline.

Description

technical field [0001] The invention relates to a device for preventing subsidence of medium around underground pipelines, which is suitable for the prevention and treatment of underground pipeline defects, and belongs to the technical field of underground pipeline defect prevention, diagnosis and treatment. Background technique [0002] Underground pipelines are an important part of urban infrastructure, which carry a variety of material flows, energy flows and information flows, and are one of the important material foundations for the survival and development of cities. Underground pipelines include water supply, drainage, electricity, heat, telecommunications, and industrial pipelines. They are like the "nerves" and "blood" in the human body. They are responsible for transmitting information and energy day and night. The foundation of development is called the "lifeline" of the city. [0003] Underground metal pipeline transportation has the advantages of safety, high e...

AI Technical Summary

Problems solved by technology

[0006] Ultrasonic guided wave testing is a large-scale, wide-coverage and rapid preliminary detection method. After using ultrasonic guided wave technology to detect, it can make a preliminary judgment and rating on the safety of the pipeline system, and can distinguish between normal parts and dangerous parts. The position of the defect; however, this kind of detection cannot be qualitative, that is, it cannot determine what kind of defect it is, and the quantification of the defect is only an approximate evaluation, and the location of the detected defect is also rough and not very accurate. Need to use other tools or methods to make the final judgment and evaluation

When the defect area on the pipeline to be tested is large, the detection results of the ultrasonic guided wave technology will be more sensitive. For defects with a relatively small area on the transverse section of the pipeline, or defects in the form of a single point or a transverse strip, it is difficult to Detection; when the diameter of the pipeline changes in the direction of the pipeline length, this variable cross-section structure will affect the accuracy of the ultrasonic guided wave testing technology, and will also affect the detection length; when there are multiple types of defects in the pipeline to be tested, Ultrasonic guided wave testing technology is difficult to detect and distinguish

[0007] "Pipeline pig" detection, only a few units are studying the detection technology in the pipeline pig, and it is still in its infancy; the pipeline pig (pig) is a kind of detection equipment that travels with the medium in the running pipeline, and the pipeline pig is used for non-destructive Inspection is mainly used for thickness measurement (the thickness of the pipeline will be lost after corrosion) and crack inspection; the existing underground metal pipeline is not suitable for internal inspection of pipeline pigs, for example, the inner diameter of the pipeline often changes, and the bending radius of the elbow is small , the interior of the pipeline was not cleaned during construction, and there are often some debris and sundries; the inspection equipment inside the pipeline is expensive and has not been popular in the market, and ordinary inspection work is not suitable

[0008] According to the above description, the existing technologies and methods for leak detection of underground pipelines have different disadvantages. The common disadvantages are when the pipeline leaks are small, the pipeline is buried in a complex stratum in the field, and there are multiple types of pipelines coexisting around the pipeline, etc. In other cases, existing technologies cannot detect pipeline leaks

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