Detection device and detection method for reinforcement depth of complex hydraulic concrete structure
A technology for hydraulic concrete and detection device, which is applied in measurement devices, material analysis using radiation diffraction, instruments, etc., can solve the problems of not knowing the dielectric constant of concrete and violating non-destructive testing.
Active Publication Date: 2020-10-27
HOHAI UNIV
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Problems solved by technology
[0003] At present, the radar method is used to detect the parameters of concrete structure reinforcement, and the dielectric constant method is used to estimate the wave velocity of radar waves in the concrete medium. However, in actual engineering, the structures to be tested are generally old concrete structures, and the current dielectric constant of the concrete is not known. If It is not accurate to use the concrete dielectric constant in the design state as the material parameter of old concrete, and to obtain an accurate dielectric constant can only be drilled and cored on site, which violates the original intention of non-destructive testing
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Embodiment
[0030] Embodiment: The complex hydraulic concrete structure steel bar embedding depth detection method of the present invention, the schematic diagram of its realization process is as follows Figure 4 As shown, the specific steps are as follows:
[0031] (1) Make reinforced concrete specimen 15, the reinforcement arrangement diagram of specimen 15 is as follows image 3 As shown, the depth of reinforcement (the distance from the concrete surface to the upper surface of the reinforcement) is divided into 6 levels of 20mm, 40mm, 60mm, 80mm, 100mm, and 120mm. The test piece 15 is different from the conventional cuboid structure. The present invention is tentatively defined as an arc surface body structure. The thickness between two parallel arc surfaces is 156 mm, the width is 500 mm, and the horizontal length is 1000 mm. Three steel bars 16 are buried with diameters of Φ16. , carry out double-sided detection, the burial depth of steel bar 16 along the measuring line direction ...
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The invention discloses a detecting device and detecting method of the complex hydraulic concrete structure reinforcing steel bar burial depth. The device comprises a cart, an antenna which is locatedon the cart and a guide device which is connected with the cart, the guide device is installed on to-be-detected reinforced concrete through a support, the antenna is connected with a radar instrument host, the cart is connected with a driving device, and the cart moves along the guide device through the driving device. By means of the detecting device of the complex hydraulic concrete structurereinforcing steel bar burial depth, complex features of a hydraulic concrete structure like hook faces and free faces are fully considered, and through mechanical properties of all devices and a radardetecting technology, and the detecting device and detecting method are applicable to flawless detection of the reinforcing steel bar burial depth of the complex hydraulic concrete structure in any direction.
Description
technical field [0001] The invention relates to a detection device and a detection method for the burial depth of steel bars in complex hydraulic concrete structures, and belongs to the field of non-destructive detection of the burial depth of steel bars in concrete structures. Background technique [0002] The burial depth of steel bars is an important parameter of hydraulic reinforced concrete structures. Whether it meets the requirements will affect the safety and durability of structures. At present, the non-destructive testing methods for the burial depth of concrete reinforcement mainly include electromagnetic induction method and radar method. Among them, the steel bar detector based on the principle of electromagnetic method needs some restrictive conditions in the detection process. However, it is often difficult to predict the diameter of steel bars in practical engineering applications. As a non-destructive testing method, the radar method has been widely used in...
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IPC IPC(8): G01N23/20G01N23/20008
CPCG01N23/20G01N23/20008G01N2223/052G01N2223/3303G01N2223/615
Inventor 苏怀智陈健曹其光韩彰谢威
Owner HOHAI UNIV