A rapid detection device for the thickness of the steel bar protective layer inside the uneven concrete surface

Abstract

The utility model belongs to the field of steel bar detection, and relates to a rapid detection device for the thickness of the steel bar protective layer inside the uneven concrete surface, comprising: a steel bar scanner, an auxiliary compensation plate and an unevenness comparison plate, wherein the auxiliary compensation plate is placed on the uneven concrete surface, and the steel bar scanner is placed on the upper surface of the auxiliary compensation plate. The utility model can quickly and accurately obtain the actual steel bar protective layer thickness.

Description

Technical Field

[0001] The utility model belongs to the field of steel bar detection, in particular to a rapid detection device for the thickness of a steel bar protective layer inside an uneven concrete surface. Background Art

[0002] In municipal construction projects, power cables in power projects appear frequently in society. In recent years, the electricity consumption in urban areas of my country has been growing significantly year by year, and the application of power pipes and work pits is also very common. During the service of pipes and work pits, it is very necessary to study the detection and evaluation of steel bars in power pipes and work pits.

[0003] Concrete for power engineering projects is mainly poured on-site. The surface unevenness of the concrete in the pipes and work pits is high. During the scanning process of the rebar detector, the sliding wheel is often locked or shifted, which makes on-site detection very difficult. Since the elevations of the pipes are different in different parts, when the whole is cast in place, due to the self-leveling characteristics of the concrete, the concrete protective layer of the pipe reinforcement often has large positive and negative deviations, which will lead to large errors in the detection. At the same time, if the protective layer is too large, it will affect the mechanical properties of the pipe structure, and if the protective layer is too small, there will be hidden dangers in the durability of the pipe.

[0004] Currently, there is no detection equipment that can simply and quickly detect the thickness of the internal steel bar protection layer on an uneven concrete surface. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the prior art and provide a device suitable for non-destructive testing of the thickness of the steel bar protective layer inside the uneven concrete surface. The method is simple and convenient to operate.

[0006] The technical solution for implementing the utility model is as follows:

[0007] A rapid detection device for the thickness of the steel bar protective layer inside an uneven concrete surface comprises: a steel bar scanner, an auxiliary compensation plate and an unevenness comparison plate, wherein the auxiliary compensation plate is placed on the uneven concrete surface, and the steel bar scanner is placed on the upper surface of the auxiliary compensation plate.

[0008] Moreover, 5 to 9 unevenness comparison plates are provided, and the surface size is 100mm×100mm-200mm×200mm. The top surface of the unevenness comparison plate is a rough surface, and the morphology of the rough surface simulates the concrete surface to be measured.

[0009] Moreover, the unevenness comparison plate is a 3D printed plate.

[0010] Moreover, the auxiliary compensation plate is a PVC plate with a surface size of 30 mm×100 mm and a thickness of 2-5 mm.

[0011] Moreover, the steel bar scanner is embedded with a steel bar protective layer thickness compensation correction module, and the steel bar protective layer thickness compensation correction module integrates the compensation plate thickness to the steel bar protective layer thickness correction value C p And the correction value C of the steel bar cover thickness caused by surface unevenness r .

[0012] The advantages and positive effects of the utility model are:

[0013] The utility model applies the auxiliary compensation plate and the unevenness comparison plate to the non-destructive detection of the thickness of the steel bar protective layer inside the uneven concrete surface, which can reasonably correct the thickness of the protective layer. The method used by the steel bar scanner is a non-destructive detection method, which is convenient and fast, and overcomes the economic waste caused by traditional broken detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a physical picture of the unevenness comparison board.

[0016] In the figure: 1 is a steel bar scanner, 2 is an auxiliary compensation plate, 3 is an uneven concrete surface, and 4 is a steel bar. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as those commonly understood by those skilled in the art to which this application belongs.

[0018] like Figure 1 As shown, a rapid detection device for the thickness of the steel bar protective layer inside the uneven concrete surface comprises: a steel bar scanner 1, an auxiliary compensation plate 2 and an unevenness comparison plate, wherein the auxiliary compensation plate is placed on the uneven concrete surface 3, and the steel bar scanner is placed on the upper surface of the auxiliary compensation plate. The steel bar scanner is embedded with a steel bar protective layer thickness compensation correction module, and the steel bar protective layer thickness compensation correction module integrates the compensation plate thickness to the steel bar protective layer thickness correction value C p And the correction value C of the steel bar cover thickness caused by surface unevenness r .

[0019] The steel bar scanner sends an electromagnetic signal, which is reflected at the steel bar. The steel bar scanner receives the electromagnetic signal and converts it into a test value C of the steel bar protective layer thickness detected by the steel bar scanner. a , according to the compensation plate thickness to the steel bar protection layer thickness correction value C pAnd the correction value C of the steel bar cover thickness caused by surface unevenness r Correction is performed to obtain the corrected actual steel bar protective layer thickness value C i .

[0020] Figure 2 This is a physical picture of the unevenness comparison plate. According to the results of the unevenness corresponding correction values, 5 types of unevenness are selected as the final comparison plate model. 5 to 9 sample sections with different flatness (100mm×100mm-200mm×200mm) are taken at the construction site. In the laboratory, 9 concrete specimens (100mm×150mm) are prepared by simulating the on-site construction method. The concrete surface is subjected to interface treatment to obtain specimens with different unevenness. The sample three-dimensional geometric model is obtained by scanning with a laser scanner with an accuracy of 0.2mm; the image is repaired by Geomagic studio to obtain a complete test surface; the coordinate value of the uneven surface of the sample is obtained by CAD software; the arithmetic mean formula is used as well as Under the 95% guarantee rate, the correction value C corresponding to the unevenness is obtained r .

[0021] The auxiliary compensation plate refers to the PVC auxiliary compensation plate with a size of 30mm×100mm. The correction value C of the compensation plate thickness to the steel bar protective layer thickness p It refers to the thickness of the PVC auxiliary compensation board with a size of 30mm×100mm, and the thickness range is 2-5mm.

[0022] The method of using this device is:

[0023] 1) Compare the uneven concrete surface with the prefabricated unevenness comparison plate to obtain the corresponding correction value C of the steel bar cover thickness caused by the surface unevenness r =5mm;

[0024] 2) Measure the thickness of the auxiliary compensation plate and obtain the correction value C of the compensation plate thickness to the steel bar protective layer thickness p =5mm, and place the auxiliary compensation plate on the uneven concrete surface;

[0025] 3) The rolling steel bar scanner detects the test value C of the steel bar protective layer thickness a =40mm;

[0026] 4) According to the following formula, the corrected actual steel bar protective layer thickness value C is obtained: i =30mm:

[0027] C=C a -C p -C r

[0028] C—Corrected actual steel bar cover thickness value

[0029] C a —Rebar scanner detects the test value of the thickness of the steel bar protective layer

[0030] C p —Correction value of compensation plate thickness to steel bar cover thickness

[0031] C r —Correction value of steel bar cover thickness caused by surface unevenness

[0032] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rapid detection device for the thickness of the steel bar protective layer inside the uneven concrete surface, characterized in that: include: A steel bar scanner, an auxiliary compensation plate and an unevenness comparison plate, wherein the auxiliary compensation plate is placed on the uneven concrete surface, and the steel bar scanner is placed on the upper surface of the auxiliary compensation plate.

2. The rapid detection device for the thickness of the steel bar protective layer inside the uneven concrete surface according to claim 1 is characterized in that: The unevenness comparison plates are provided in 5 to 9 pieces, and the surface size is 100mm×100mm-200mm×200mm. The top surface of the unevenness comparison plate is a rough surface, and the morphology of the rough surface simulates the concrete surface to be measured.

3. The rapid detection device for the thickness of the steel bar protective layer inside the uneven concrete surface according to claim 2 is characterized in that: The unevenness comparison plate is a 3D printed plate.

4. The rapid detection device for the thickness of the steel bar protective layer inside the uneven concrete surface according to claim 3 is characterized in that: The auxiliary compensation plate is a PVC plate with a surface size of 30 mm×100 mm and a thickness of 2-5 mm.

5. The rapid detection device for the thickness of the steel bar protective layer inside the uneven concrete surface according to claim 4 is characterized in that: The steel bar scanner is embedded with a steel bar protective layer thickness compensation correction module, which integrates the compensation plate thickness to the steel bar protective layer thickness correction value C p And the correction value C of the steel bar cover thickness caused by surface unevenness r .

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