In-service transformer-station concrete component load-bearing safety detection device and detection method thereof

Abstract

The invention discloses an in-service transformer-station concrete component load-bearing safety detection device which comprises a crack magnifier of a multi-mark scale lens. The invention is characterized by also comprising an upper cylinder which cooperates with the crack magnifier; and the scale lens of the crack magnifier comprises the following scales: (1) the basic scale is a crack width mark; and (2) related scale mark lines of the bearing strength attrition rate and the remaining safe life limit of the corresponding component are arranged above and below the crack width mark, and the scale value between every two related scale mark lines is calculated and determined according to the functional relationship between the crack width of the corresponding component and the load-bearing capacity loss as well as the safe life. The invention calibrates the component load-bearing loss and evaluates the service life by utilizing the crack magnifier of the multi-mark scale lens corresponding to different types of bars in the transformer station; the same lens can be used for carrying out the load-bearing safety calibration on different reinforced components; and when the concrete grades of the component are different, the corresponding multi-mark scale lens can be replaced for use, thereby being very convenient.

Description

technical field [0001] The invention relates to a new detection technology for bearing safety of old concrete rods in in-service substations, which is different from conventional detection methods. Background technique [0002] For general building concrete beam-column components, the load-carrying safety needs to be determined by the concrete strength and the corrosion section loss of the steel bar; the concrete strength is tested by coring the frame structure for compressive strength test, and the steel bar corrosion detection is evaluated by directly exposing the steel bar by drilling holes The loss percentage of steel bar cross-section (steel bar corrosion detector can only estimate the corrosion probability), but the above-mentioned detection technology cannot be used for the concrete members of substations in service. Since the members are thin-walled members, generally with a wall thickness of about 5cm, it is difficult to obtain standard core samples ( 10cm high and ...

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Problems solved by technology

[0002] For general building concrete beam-column components, the load-carrying safety needs to be determined by the concrete strength and the corrosion section loss of the steel bar; the concrete strength is tested by coring the frame structure for compressive strength test, and the steel bar corrosion detection is evaluated by directly exposing the steel bar by drilling holes The loss percentage of steel bar cross-section (steel bar corrosion detector can only estimate the corrosion probability), but the above-mentioned detection technology cannot be used for the concrete members of substations in service. Since the members are thin-walled members, generally with a wall thickness of about 5cm, it is difficult to obtain standard core samples ( 10cm high and wide) for the compressive strength test, and the concrete structure operating at the substation is generally forbidden to drill holes in each component, so that the direct detection of steel bars is limited; generally only scrapped components are transported to the laboratory for testing on new ones The simply supported bearing test is judged according to the standard, but not necessarily every substation has scrapped members or the number is extremely limited, and the bearing safety test results of scrapped members cannot fully represent the bearing safety of other members in the substation

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