Long-span steel-concrete composite bridge structure and construction process thereof

Abstract

The invention discloses a long-span steel-concrete composite bridge structure and construction process thereof. Thus, the problems in the prior art of restricted bridge span and large integral steel using amount of bridges can be solved. The bridge structure and construction process can realize factory prefabrication and have beneficial effects of saving construction periods and steel using amount. The schemes include as follows: the bridge structure includes a steel main beam, a concrete bridge deck and bridge piers; the steel main beam includes multiple sections which can be assembled; the steel main beam adopts a box type section structure in a width direction; the two sides of the box type section structure are provided with outer longitudinal beams connected to the box type section structure; the concrete bridge deck is arranged on the top of the steel main beam and connected to the steel main beam; and steel diagonal bracings are arranged between the bridge piers and the steel main beam.

Description

technical field [0001] The invention relates to the field of bridge structures, in particular to a long-span steel-concrete composite bridge structure and construction technology. Background technique [0002] A steel-concrete composite bridge is a bridge made of steel and concrete. The key to composite bridges is "combination", that is, to take effective measures to make the concrete bridge deck and steel girder work together. [0003] So far, according to statistics, the total number of bridges in my country exceeds one million, while the total number of steel bridges is less than ten thousand, accounting for less than 1%. In France, steel bridges and steel-concrete composite bridges account for 85% of the total bridges, in Japan this proportion is about 50%, and in the United States it is 30%. This gap shows that there is still a lot of room for improvement in the development of steel structure bridges in my country. [0004] Since 2010, with the strengthening of my co...

AI Technical Summary

Problems solved by technology

When the span of the steel-concrete composite beam is further increased, the beam height at the top of the pier needs to be further increased, and its height is generally more than 7.5 meters. The stability of the steel structure will become a controlling factor in the design. It is difficult to manufacture, and the steel consumption of the bridge increases sharply, which reduces the economy of the bridge

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