A combined concrete formwork system and its construction method

Abstract

The invention belongs to the technical field of large-volume concrete crack control, and in particular relates to a combined concrete formwork system and a construction method, aiming at controlling large-volume concrete cracks. It includes a bottomless box and a power system. The front side wall, left side wall and rear side wall of the bottomless box are fixed, and the right side wall approaches or moves away from the bottomless box under the action of the power system. The right side wall Including the fixedly connected upper steel mold and the lower water-stop rubber strip, the top of the upper steel mold is symmetrically cantilevered at both ends to set up sliding components and supporting power systems, so that the right side wall can slide on the slide rails on the top of the front and rear side walls, and the displacement can be achieved. f(x) Control the deformation of the absorbed concrete, eliminate the internal temperature stress of the concrete, and prevent the concrete from cracking; at the same time, through the displacement f(x) Controls the amount of left shift of the right side wall on the property's front and rear side walls f (x） max , which can effectively ensure that the size of the concrete structure meets the design requirements.

Description

technical field [0001] The invention belongs to the technical field of large-volume concrete crack control, and in particular relates to a combined concrete formwork system and a construction method thereof. Background technique [0002] With the continuous development of concrete structures towards higher heights and larger spans, the size of concrete structures is also increasing, which makes the temperature rise faster and faster during the concrete pouring process, and the peak temperature is also higher and higher , leading to the continuous increase of temperature stress and internal stress concentration phenomenon, once the stress is not released, cracks will be generated inside the concrete, which will lead to cracking of the concrete, which is especially prominent in the pier structure. [0003] At present, the formwork used in concrete pouring is generally fixed according to the design structure size, so that the internal temperature stress of the concrete cannot b...

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Problems solved by technology

[0003] At this stage, the formwork used in concrete pouring is generally fixed according to the design structure size, so that the internal temperature stress of the concrete cannot be released, and it is easy to cause concrete cracking

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