High-temperature steam curing construction method for prefabricated bridge deck of UHPC steel-concrete composite beam without coarse aggregate

Abstract

The invention provides a high-temperature steam curing construction method for a prefabricated bridge deck of a UHPC steel-concrete composite beam without coarse aggregate. The method comprises the following steps that 10, steel bars are blanked and machined, specifically, the steel bars are machined and distributed in a centralized mode in a factory; 20, a mold is installed, specifically, a formwork of the bridge deck is installed, and the formwork comprises a bottom mold, a transverse side mold and a longitudinal side mold; 30, the steel bars and embedded parts are installed, specifically, an upper layer of steel bar net and a lower layer of steel bar net which are arranged in a spaced mode are installed on the formwork through the steel bars, and the embedded parts are installed on the formwork; and 40, concrete is mixed, specifically, a premix package with the concrete prefabricated and an additive and steel fiber formula package are included, and the premix package and the formula package are put into a stirrer till the concrete is mixed and discharged out of a station. According to the high-temperature steam curing construction method for the prefabricated bridge deck of the UHPC steel-concrete composite beam without the coarse aggregate, the self-weight load of the structure can be reduced, the design is lighter and more economical, and the common problem of cracking of the bridge deck and the like can be well solved.

Description

【Technical field】 [0001] The invention relates to the technical field of building construction, in particular to a high-temperature steam-cured construction method for prefabricated bridge decks of UHPC steel-concrete composite beams without coarse aggregate. 【Background technique】 [0002] According to incomplete statistics, as of 2016, there are about 101 bridges using UHPC in the United States, 93 in Malaysia, 87 in Canada, 55 in Europe, 7 in Oceania, 21 in Japan, and 4 in South Korea. As of the end of 2016, at least more than 30 bridges in China have adopted UHPC, of ​​which 5 are used for the main structure (such as main girder or arch rib), and most of the remaining bridges use UHPC for steel-UHPC light composite deck and structural maintenance Reinforced or wet seams. [0003] Although UHPC concrete technology has been used for a long time at home and abroad, there are very few applications in the prefabricated bridge deck of steel-concrete composite beams. Its prom...

AI Technical Summary

Problems solved by technology

However, the traditional orthotropic steel bridge deck and steel-concrete composite beam structure have problems such as high structural self-weight load, bulky design, high cost, and easy cracking of the bridge deck.

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