Reinforcing steel bar protective layer thickness control device and construction process

Abstract

The invention discloses a reinforcing steel bar protective layer thickness control device. The thickness control device comprises vertical reinforcing steel bars, transverse reinforcing steel bars, base point positioning parts and protective layer positioning parts, wherein the base point positioning parts are fixed to the two adjacent vertical reinforcing steel bars in pairs, each base point positioning part comprises a clamp, fastening bolts, gaskets, a fastening material, a limiting movable hole, a limiting hole and scale marks, one ends of the clamps are effectively connected to the vertical steel bars through the fastening bolts, the gaskets and the fastening materials, the clamps are provided with the limiting movable holes, the scale marks are arranged on the front surfaces of the clamps, the scale marks are located above openings in the outer sides of the limiting movable holes, the limiting holes are formed in the flat sides of the clamps, and the limiting holes are perpendicular to the vertical steel bars and the transverse steel bars, the protective layer positioning parts extend into the limiting movables of the clamps, and limiting screws penetrate through the limitingholes and fix the protective layer positioning parts. The invention further provides a manufacturing process of the reinforcing steel bar protection layer thickness control device. According to the control device, the assembly performance is good, and high precision is achieved in the aspect of controlling the thickness of the protective layer.

Description

technical field [0001] The invention relates to the fields of bridge engineering and construction engineering, in particular to a thickness control device and a construction process of a steel bar protective layer. Background technique [0002] With the continuous development of my country's economy, in recent years, the state advocates "green and environmentally friendly" prefabricated structures. Most prefabricated structures are formed by prefabricating concrete components in factories and assembling on site. The national quality supervision department supervises the thickness of the protective layer of prefabricated concrete components. Very strict. [0003] In the prefabrication process, using traditional devices to control the thickness of concrete is difficult to achieve the expected pass rate of the steel protective layer, which often leads to the following problems: (1) During installation, the formwork will squeeze and collide with the cushion blocks, and the struct...

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Problems solved by technology

[0003] In the prefabrication process, using traditional devices to control the concrete thickness is difficult to achieve the desired pass rate of the steel bar cover, which often leads to the following problems: (1) The extrusion and collision of the formwork on the pad during installation, the structure cannot be used after the concrete is poured. Repeated use makes it difficult to control the qualification rate of the steel bar cover; (2) the positioning of the existing cover control device is poor, and the actual cover thickness is difficult to accurately control; (3) there are fewer types of pads on the market, When the thickness of the protective layer is small or the thickness of the protective layer is large, it is necessary to use a welding extension device (such as welding a section of bent transverse short steel bars with pads) in order to achieve the effect of controlling the thickness of the protective layer. The cumbersome process and high cost of uniform or other devices will greatly reduce the control accuracy of the protective layer thickness and the cost performance of the device; (4) The thickness of the concrete protective layer of different components in the same project or components in different projects is often different, This requires the construction unit to purchase or make a variety of pads. If the pads with a size difference of 5mm or 10mm do not have obvious recognition, it is easy to use the wrong pads, which will greatly affect the quality of reinforced concrete.

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