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Qualitative and quantitative defect detection method for thin-walled centrifugal concrete steel tube tower

A quantitative detection method, the technology of concrete steel pipes, applied in the direction of measuring devices, material inspection products, test and manufacturing objects, etc., to achieve the effect of simple construction

Active Publication Date: 2020-03-13
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention provides a method for qualitative and quantitative detection of defects in a thin-walled centrifugal concrete steel pipe tower to solve the technical problems raised in the background technology

Method used

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  • Qualitative and quantitative defect detection method for thin-walled centrifugal concrete steel tube tower
  • Qualitative and quantitative defect detection method for thin-walled centrifugal concrete steel tube tower
  • Qualitative and quantitative defect detection method for thin-walled centrifugal concrete steel tube tower

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Embodiment 1

[0035]Embodiment 1, bonding state ultrasonic detection

[0036] Ultrasonic testing principle: When the ultrasonic wave is perpendicular to the smooth plane surface, a reflected wave opposite to the direction of the incident wave will be generated in the first medium, and a transmitted wave in the same direction as the incident wave will be generated in the second medium.

[0037] Let the sound pressure of the incident wave be P 0 (sound intensity is I 0 ), the voltage of the reflected wave is P r (sound intensity is I r ), the sound pressure of the transmitted wave is P t (sound intensity is I t ).

[0038] The sound pressure P of the reflected wave and the sound pressure P of the incident wave on the interface 0 The ratio is called the sound pressure reflectivity of the interface, expressed by r, that is, r=P r / P 0 .

[0039] Transmitted wave sound pressure P on the interface t and incident wave sound pressure P 0 The ratio is called the sound pressure transmitta...

Embodiment 2

[0090] Embodiment 2 welding reinforcement scheme

[0091] The reinforcement method of welding reinforcement plates on the weld seam is more suitable for the thin-walled centrifugal concrete steel pipe structure studied by the present invention. While meeting the strength requirements, it can simplify the difficulty of field operations and improve work efficiency.

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Abstract

The invention provides a qualitative and quantitative defect detection method for a thin-walled centrifugal concrete steel tube tower. The method comprises the following steps: S1, introducing an advanced phased array defect imaging detection technology into steel tube pole weld joint detection, accurately judging the property, size and severity of defects, and achieving nondestructive evaluationof standard exceeding defects of a steel tube pole; S2, studying the influence of the welding temperature on the performance of the thin-walled centrifugal concrete steel tube tower; S3, testing the bonding condition of a concrete-filled steel tube by means of nondestructive testing; S4, determining a safety evaluation method for the allowable defect size of a defect-containing thin-walled centrifugal concrete steel tube tower; and S5, researching reinforcement schemes for the defect-containing thin-walled centrifugal concrete steel tube tower; and checking the strength of the defect-containing thin-walled centrifugal concrete steel tube tower under different reinforcement schemes, and comparing and analyzing the feasibility and economy of the different reinforcing schemes.

Description

technical field [0001] The invention relates to the technical field of concrete steel pipe towers, and mainly relates to a defect qualitative and quantitative detection method for thin-walled centrifugal concrete steel pipe towers. Background technique [0002] The guyless pole tower has been widely used on transmission lines due to its simple structure, beautiful appearance, small footprint, and convenient installation. In line with the principles of advanced technology, safety, reliability, and cost-effectiveness, the application of rod body materials is gradually developing towards high-strength steel, such as Q345 steel and Q460 steel pipe rods used in some lines. The economics and safety of steel pipe poles with different structural forms are very different. Therefore, it is necessary to compare the economical efficiency of different forms of pole towers in the design stage, and strictly control the quality in the manufacturing and installation stage to ensure the safe ...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01N33/207G01N33/38G01N29/06G01N29/04
CPCG01N33/00G01N33/207G01N33/383G01N29/069G01N29/043G01N2291/0232G01N2291/0234G01N2291/0289G01N2291/044G01N2291/2675G01N33/0078
Inventor 耿进锋时洪飞肖寒姚德贵崔大田陈伟汪毅张武能马东方马磊
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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