Large-span box girder forming die and forming process

Abstract

The invention discloses a wet joint dabbing-free conveniently assembled and disassembled large-span box girder forming die and a forming process using the die for casting a box girder to overcome theshortcomings of the prior art. The box girder forming die is conveniently assembled and disassembled. Besides, the actual die is not easy to damage or deform and high in reuse rate. Side plates of thebox girder have heat insulation and shock absorption functions, on one hand, weather resistance is greatly enhanced, on the other hand, part of surface stress formed in the casting and vibrating process can be offset, and the surface quality of the box girder is comprehensively improved. A wet joint baffle plate is matched with a reticulated stainless steel plate, an original manual dabbing process can be omitted, a wet joint connecting surface is more uniform and reliable, manpower, material resources and construction period are reduced by the forming process provided according to a designedformwork, construction cost is reduced, and the forming process has higher economic values.

Description

technical field [0001] The invention belongs to the field of bridge construction, and in particular relates to a forming die for a large-span box girder and a forming process thereof. Background technique [0002] Box girder is a kind of middle beam in bridge construction. It is a reinforced concrete structure. It is named because the interior is hollow and looks like a box. It is divided into single box and multi-box according to the number of hollows. [0003] According to relevant construction regulations, the wet joints of box girders need to be chiseled before pouring, and the chiseled area is not less than 80%. Problems, such as: Improper chiseling method, using steel bar point poking; roughening before initial setting of concrete, premature chiseling leads to loose concrete, etc., resulting in unqualified box girder inspection, unreliable wet joint construction, affecting construction quality and safety . [0004] In addition, the ordinary box girder formwork is rep...

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Problems solved by technology

[0003] According to relevant construction regulations, the wet joints of box girders need to be chiseled before pouring, and the chiseled area is not less than 80%. Problems, such as: Improper chiseling method, using steel bar point poking; roughening before initial setting of concrete, premature chiseling leads to loose concrete, etc., resulting in unqualified box girder inspection, unreliable wet joint construction, affecting construction quality and safety

[0004] In addition, the ordinary box girder formwork is repeatedly fixed and separated before and after each pouring. On the one hand, it consumes a lot of manpower. Single-layer steel plate is easy to affect the solidification of concrete at low temperature, resulting in poor surface quality and uneven strength of the box girder

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