Precast concrete unit vertical butt matching turnover formwork process method

Abstract

The invention discloses a precast concrete unit vertical butt matching turnover formwork process method. The process method includes that an impression A is poured on the top surface of the lower segment of a vertical segmental precast installed concrete unit, an impression B is poured on the top portion of the impression A after the impression A is turned over, and the turned-over impression B is used as a soffit formwork of upper segment precast construction of the concrete unit. The precast concrete unit vertical butt matching turnover formwork method has the advantages that matching precision is high; through two times of pouring and turning-over of the impressions, duplication of the top surface of the lower segment of the segmental precast concrete unit is achieved, a duplicated impression is used as the soffit formwork of the upper segment of the concrete unit, and seam crossings of the upper segment and the lower segment are guaranteed to be fully matched with each other. The precast concrete unit vertical butt matching turnover formwork method is convenient to operate, low in equipment request, low in impression height, free of large-tonnage cranes, low in equipment request, and easy to achieve.

Description

technical field [0001] The invention belongs to a manufacturing method of building concrete components, and in particular relates to a vertical butt joint matching turning process method of prefabricated concrete components. Background technique [0002] Impression: Concrete components that are prefabricated and installed vertically in sections are generally divided into upper, lower or more sections. There is a raised (depressed) part on the top surface of the lower section, and a concave (raised) part is provided on the bottom surface of the upper section. The convex (concave) and concave (convex) portions of the upper section fit together. During the construction process, a layer of concrete is poured on the top surface of the lower section, and the convex (depressed) shape is printed in the concrete. The impression is formed when the section of concrete imprinted with raised (recessed) shapes is removed from the formwork. [0003] Before the invention of this technolog...

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Problems solved by technology

[0006] Disadvantages and deficiencies of existing construction technology: ①Low matching accuracy

For the upper and lower sections of the prefabricated concrete components on the prepared bottom tire, the top surface of the lower section will have a dimensional deviation from the design value during the prefabrication process, and the bottom surface of the upper section will also have a dimensional deviation from the design value during the prefabrication process. It causes the problem of incomplete matching between the top surface of the lower section and the bottom surface of the upper section

② Inconvenient operation and high equipment requirements

For the process of prefabricating the upper section directly on the lower section, when the height of the upper and lower sections of the precast concrete member is high and the weight of the upper section is heavy, a large-tonnage crane with a high lifting height is required, which greatly increases the construction cost and difficulty

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