Bridge total external prestress concrete segment spliced light thin-walled box girder

Abstract

The invention relates to the field of civil engineering bridges, in particular to a bridge total external prestress concrete segment spliced light thin-walled box girder formed by splicing a plurality of prefabricated segments. The bridge total external prestress concrete segment spliced light thin-walled box girder comprises pier top segments, turning segments and external prestress steel penetrating the pier top segments and the turning segments. The bridge total external prestress concrete segment spliced light thin-walled box girder has the beneficial effects that a brand new box girder structural form is created, a vacancy in the prestress technology in China is filled up, and the problems that the theory is vague and the standard is vacant in the domestic external prestress concrete bridge structural design are solved with the concept of a 'multi-span hidden type extradosed cable-stayed bridge'; the external prestress steel is totally arranged outside girder body concrete, corrugated pipes do not need to be embedded, and the grouting construction is not needed; and the concrete pouring quality is high, the splicing and bridge forming speed is high, and the splicing speed of seven days for one span can be achieved for medium and small span bridges.

Description

technical field [0001] The invention relates to the field of civil engineering bridges, in particular to a lightweight thin-walled box girder assembled from prestressed concrete segments of the entire bridge. Background technique [0002] The bridge prestressed concrete box girder includes a closed-section beam body composed of top plate, bottom plate, web plate, and diaphragm, and the main parts such as longitudinal prestressing that are arranged and anchored to the beam body to provide load-bearing support. Its structure is simple and its overall performance is superior, and it has always been one of the most commonly used main girder structures in bridge engineering. European and American countries attach great importance to the development of its industrialized segmental prefabrication and assembly technology. By the 1990s, systematic research had been carried out on key technologies such as structural structure, construction method, and construction technology, and a co...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned domestic bridge prestressed concrete section assembled box girder problems such as fuzzy theory, lack of norms, low level of standardization and industrialization, many hidden dangers in safety and durability, low efficiency and high price, the present invention provides an overall external prestressed bridge Concrete Segment Assembled Lightweight Thin-walled Box Girder

Images