Concrete-filled steel tube arch bridge and construction method

Abstract

The invention relates to a concrete-filled steel tube arch bridge. The concrete-filled steel tube arch bridge includes side arch ribs, main arch ribs, suspension bars, tie bars and a bridge pier and abutment structure. Side span structures include side arch supports, side span cast-in-place reinforced concrete arch ribs, cast-in-place side arch end cross beams, side span cast-in-place cross beamsbetween ribs, cast-in-place side arch rib tie beams, cast-in-place side upright posts, flexible prestressed tie bars and cast-in-place bridge deck slabs. Mid-span structures include abutments, mid-span concreted-filled steel tube arch ribs, main arch hollow cross beams between ribs, precast hollow longitudinal beams, flexible prestressed tie beams, tie-bar steel plate boxes, truss-type permanent upper wind braces, K-shaped permanent intermediate wind braces, temporary wind braces, arch foot pre-embedded sections, inner steel strand whole-bundle-squeezed inhaul cable suspension bars and outer steel strand whole-bundle-squeezed inhaul cable suspension bars. The concrete-filled steel tube arch bridge has the beneficial effects that steel tube arch rib fixation brackets involved in the concrete-filled steel tube arch bridge can improve the stability during installation and construction of steel tube arch ribs, and the accuracy of butt joint can be guaranteed effectively.

Description

technical field [0001] The invention relates to a steel pipe concrete arch bridge and a construction method, which belongs to the field of bridge engineering and is suitable for the construction of a Feiyan type steel pipe concrete arch bridge. Background technique [0002] The construction of long-span bridges requires the use of high-strength, lightweight and easy-to-construct engineering materials, and it is hoped that the structure has good ductility and recovery performance. The use of steel tube concrete composite materials in arch bridges can greatly reduce the self-weight of the bridge, and can also improve the structural dynamic performance to a large extent. The arch ribs of CFST arch bridges are mainly compression members, and their stability has always been a concern of bridge engineers. The lateral stiffness of long-span arch bridges is generally small, and large displacements will occur under wind loads, which may affect the normal operation of the bridge stru...

AI Technical Summary

Problems solved by technology

[0004] During the construction of concrete-filled steel tube arch bridges, it is often difficult to install and fix the arch foot formwork

In the construction process of concrete-filled steel tube arch bridges, it is often difficult to guarantee the butt joint accuracy of steel tube arch ribs, it is difficult to control the structural stability during the construction process, and the labor investment in the installation process of steel tube arch ribs is large, the economy is poor and the construction process is safe. problems such as poor sex

The conventional tie-rod system and suspender construction method of the concrete-filled steel tube arch bridge cannot meet the construction requirements, and the construction steps of the traditional drop frame technology are cumbersome and difficult to organize

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