Lower bearing type tied-arch bridge structure unit and arch bridge structure and construction method thereof

Abstract

The invention discloses a lower bearing type tied-arch bridge structure unit and an arch bridge structure and a construction method thereof. The lower bearing type tied-arch bridge structure unit comprises pier columns, pier column connecting tie beams, supporting bases, arch ribs, arch feet, tie beams and hanging rods, wherein the supporting bases and the arch ribs are installed on the tops of the pier columns, the arch feet are arranged at the bottoms of the two ends of the arch ribs, the tie beams are connected between the two ends of the arch ribs, and the hanging rods make the tie beams and the arch ribs connected. The number of the arch ribs is two, the two arch ribs are arranged transversely in parallel at an interval, and wind bracing transverse rods are connected between the two arch ribs; end cross beams are connected between the arch feet on the corresponding sides of the two arch ribs; the tie beams are of a steel framework concrete structure comprising a tie beam steel framework, pre-stress steel bars and tie beam concrete poured on the outer side of the tie beam steel framework and the outer sides of the pre-stress steel bars; the tie beams on the two arch ribs are connected through a group of middle cross beams. According to the unit, the technical problems that when a traditional steel tube concrete arch bridge is constructed, the concrete disengaging effect islikely to occur, the navigation width is small during construction, and a platform cannot be erected or constructed in a channel are solved.

Description

technical field [0001] The invention relates to a structural unit of an under-supported tied-rod arch bridge, an arch bridge structure and a construction method thereof. Background technique [0002] The under-supported tied arch bridge is a non-thrust arch composite system, which is an externally statically indeterminate structure, and has two characteristics: the large spanning capacity of the arch bridge and the strong adaptability to the foundation of the simply supported girder bridge. When the bridge is restricted and the bridge needs to ensure a large clearance (under the bridge clear span and clear height), the thrustless arch composite system bridge is a superior bridge type. [0003] In recent years, tied arch bridges have been widely used in highway and railway projects due to their advantages such as large spans, light structures, beautiful shapes, and low building materials. The ordinary reinforced concrete arch bridge makes the foundation bear a large horizont...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of under-supporting tie-bar arch bridge structural unit and arch bridge structure and its construction method, to solve the problem that the traditional concrete-filled steel pipe arch bridge is prone to concrete emptying effect during construction and the navigable width is narrow during construction, which cannot Technical Problems of Building Construction Platforms in Channels

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