Formwork system for prefabricating waffle slab through ultra-high-performance concrete (UHPC), and construction method of formwork system

Abstract

The invention discloses a formwork system for prefabricating a waffle slab through ultra-high-performance concrete (UHPC), and a construction method of the formwork system. The construction method ofthe formwork system comprises the steps that (1) UHPC pouring grooves are assembled; (2) steel bar positioning lines are arranged, and steel bars are bound; (3) UHPC pouring block datum lines are arranged; (4) pouring blocks and pouring belts are assembled to form pouring grids; (5) the pouring grids are built on the pouring grooves according to the datum lines; (6) UHPC is poured and vibrated, and the UHPC surface is trowelled; (7) a formwork is removed after room-temperature curing; and (8) steam curing is conducted. The formwork removal process comprises the steps that (1) bolts at pouringside plates of the pouring belts are loosened; (2) the whole pouring grid is separated from the pouring grooves, and then the pouring belts and bolts at the pouring blocks are loosened; (3) the pouring side plates slide away from sliding grooves; and (4) the UHPC waffle slab is separated from a pouring bottom plate. The formwork system, the construction method and the formwork removal process havethe advantages that various moduli can be changed, cyclic utilization is achieved, formwork removal is convenient, batch prefabrication is realized, construction is efficient and convenient, and environmental protection and safety are achieved, the overall accuracy can be guaranteed, and the UHPC wafer slab prefabrication problem is solved.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a formwork system and construction method of UHPC prefabricated waffle panels. Background technique [0002] Bridge rapid construction (Accelerated Bridge Construction, ABC) originated in the United States, mainly through the factory prefabrication of components, the use of special transportation equipment to transport components to the site and install them, to achieve a technology that speeds up the construction of bridges on site. Steel-concrete composite beams have excellent mechanical properties that the upper concrete slab is under compression and the lower steel girder is under tension, and it is easy to realize the assembly of steel beams and precast concrete slabs. It was first considered by engineers and used in rapid bridge construction. However, because the traditional concrete slab is thick and has a large self-weight, it is difficult to meet the hoisting ...

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Problems solved by technology

[0004] In order to solve the above problems, the object of the present invention is to provide a UHPC prefabricated waffle slab formwork system and a bottom-up pouring construction method to solve the inconvenience of removing the formwork of the existing waffle slab formwork system, and it is difficult to realize the parameter adjustment and adjustment of the formwork. recycling problem

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