Precise assembly construction structure of large-span stiff skeleton concrete arch bridge

Abstract

The invention discloses a precise assembly construction structure of a large-span stiff skeleton concrete arch bridge, and belongs to the technical field of bridge construction. The precise assembly construction structure comprises a mountain body, arch feet, arch rings, tower frames, a connecting steel cable, hanging rods, bridge columns and a road surface, wherein the tower frames are arranged at the top of the mountain body; the connecting steel cable is used for connecting the two tower frames; and the hanging rods are arranged at the bottom of the connecting steel cable. According to theprecise assembly construction structure, the arch rings of the concrete arch bridge are composed of the two fixed arch rings and one connecting arch ring, so that the length of each independent half arch ring is shortened, the transportation difficulty, the requirements for equipment and the construction difficulty are reduced, the construction period can be shortened, and the construction processis simplified; according to the invention, the tower frames can be used as cableway brackets for mounting the semi-arch ring when the arch bridge is constructed, and can also be used as bridge towerframes after the construction is finished; and the bridge columns and the arch rings are dragged by utilizing the connecting steel ropes and the hanging rods, so that the effect of sharing the supporting force is achieved, and the stability of the bridge is improved.

Description

technical field [0001] The invention relates to the technical field of bridge construction, and more specifically relates to a precisely assembled construction structure of a large-span skeleton concrete arch bridge. Background technique [0002] Stiff concrete structure is a main form of steel-concrete composite structure, which is a special composite material formed by adding section steel inside reinforced concrete. Since the shaped steel core exists like a skeleton, it can effectively improve the ductility of the concrete and greatly improve the seismic performance of the concrete; and the lateral restraint of the concrete on the steel ensures that the mechanical properties of the steel can be exerted and will not quit work early due to instability. Due to its high bearing capacity, high rigidity, good fire resistance and good seismic performance, it has been more and more used in long-span structures and high-rise buildings and super high-rise buildings in earthquake zo...

AI Technical Summary

Problems solved by technology

[0004] In the construction of railways, it is often applied to large-span skeleton concrete arch bridges. Long-span skeleton concrete arch bridges are usually used in the construction of cross-river or cross-river situations. On both sides of the mountain, the two pre-cast half-spans are then rotated to form a complete arch ring. However, the construction process of the long-span skeleton concrete arch bridge in this way is complicated and requires high equipment. The length of the half-span arch circle is long, it is inconvenient to transport in the mountains, and the construction is difficult, and there are certain safety risks

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