Hydraulic early warning method and device for concrete structure

A technology of concrete structure and early warning device, applied in the direction of optical testing flaws/defects, etc., can solve the problems of strain gauge damage, high technical cost, disorder, etc., and achieve the effects of no signal interference, not easy to damage, and low cost.

Active Publication Date: 2012-06-20
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, these cracks cannot be observed by human eyes, but there are indeed immeasurable safety hazards, so the structure should be inspected regularly with the help of corresponding instruments
Taking the bridge structure as an example, most of the bridge detection and early warning devices used domestically and internationally are equipped with stress gauges or strain gauges, etc., and transmit the real-time sta

Method used

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  • Hydraulic early warning method and device for concrete structure
  • Hydraulic early warning method and device for concrete structure
  • Hydraulic early warning method and device for concrete structure

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Embodiment

[0023] Such as figure 1 As shown, the early warning tube that meets the material requirements is used, after the colored liquid mixed with fluorescent powder is poured in, the two ends are inflated and pressurized to a pressure that can fully make the liquid spray out, and the seal is sealed. In this way, the early warning tube is ready, and then some scratches are added on the surface of the early warning tube. When the early warning tube is buried in the concrete, the friction force can be increased to further prevent slippage between the concrete and the early warning tube. In addition, the early warning pipe should not be too thick, otherwise it will affect the structural bearing capacity. The early-warning pipe should be buried in a position that is more likely to be damaged. For example, according to the characteristics of compression bending damage, the lower part of the beam bears the largest tensile force when the beam is bent, and the concrete usually cracks from the...

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Abstract

The invention discloses a hydraulic early warning method and a device for a concrete structure, which belong to the technical field of civil engineering. A hydraulic early warning pipe is utilized, colored liquid mixed with fluorescent powder is filled in the middle of the hydraulic early warning pipe, high-pressure gas is filled in two ends of the hydraulic early warning pipe, and the hydraulic early warning pipe is buried in the concrete after being sealed. When concrete cracks reach a dangerous value, the early warning pipe is exactly broken, the colored liquid is ejected out under the high pressure to color the concrete, and then an early warning function is achieved. By means of the hydraulic early warning method and the device for the concrete structure, early warning of the concrete structure can be timely achieved when harmful tiny cracks appear, and various shortcomings of an existing detection early warning method can be simultaneously reduced. The hydraulic early warning method and the device for the concrete structure are simple, easy to operate, not easy to damage, capable of carrying out continuous long-time early warning and low in cost, and have no need for power supply.

Description

technical field [0001] The invention relates to a method in the technical field of civil engineering, in particular to a hydraulic early warning pipe for early warning of concrete structures and a method for early warning. Background technique [0002] As we all know, the damage of reinforced concrete structure is not a sudden bending fracture, but some micro-cracks gradually develop into larger cracks, which leads to the overall damage of the structure. The cracks of reinforced concrete structural members can be divided into three types according to their characteristics: one is the small cracks on the surface, that is, the crack width is small, the length is short and shallow; the other is medium cracks, the width is about 0.2mm, and the length is limited to the tension The cracks have penetrated into the structure to a certain depth; the third is the penetrating crack, the crack width exceeds 0.3mm, the larger the crack width, the easier the steel bar is corroded, especia...

Claims

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Application Information

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IPC IPC(8): G01N21/88
Inventor 段桂珍方从启
Owner SHANGHAI JIAO TONG UNIV
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