Combined bridge tower of ultra-large-span pedestrian landscape curve-shaped cable-stayed bridge and construction method

Abstract

Aiming at the requirements of an ultra-large-span pedestrian landscape curve-shaped cable-stayed bridge, a door-type bridge tower structure of a traditional cable-stayed bridge is reformed, and a uniparted hyperboloid-shaped bridge tower body, a sightseeing tower cap, a bowl-shaped thin-wall shell skirt room and an annular sightseeing platform plate form the combined bridge tower of the ultra-large-span pedestrian landscape curve-shaped cable-stayed bridge. The bowl-shaped thin-wall shell skirt room and the uniparted hyperboloid-shaped bridge tower form a cylinder-in-cylinder structure; the cylinder-in-cylinder structure has high torsion resistance; it can be ensured that the curved cable-stayed bridge tower structure bears huge unbalanced torsion internal force, and the rotation failure of a bridge tower support is avoided. The uniparted hyperboloid-shaped bridge tower body and the sightseeing tower cap form a sightseeing tower type bridge tower structure; the curved cable-stayed bridge tower and the sightseeing tower are combined into a whole; and therefore, a foundation is shared, and manufacturing cost is saved. The large-scale uniparted hyperboloid-shaped cylindrical bridge tower structure has high lateral stiffness, cable-tower-beam coupling vibration in the pouring construction process of curved cable-stayed bridge cantilevers can be reduced, and midspan deflection deformation under the action of live loads can be reduced.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a construction technology of a cable-stayed bridge pylon structure, in particular to a composite bridge pylon and a construction method of a curvilinear cable-stayed bridge with a super-long-span pedestrian landscape. Background technique [0002] Curved bridges have special aesthetics. Building curved bridges in lake view parks or wetland parks can coordinate with the ecological environment of scenic spots and facilitate tourists to enjoy the beautiful scenery along the way. [0003] When the span of the curved girder bridge across the river is relatively large, the girder bridge will encounter considerable difficulties in structure and construction. If a large-span curved cable-stayed bridge is used, it will be very suitable. [0004] As early as 1977, Lin Tongyan, a Chinese-American, proposed the design scheme of the curved cable-stayed bridge of Ruck Bridge in the United States...

AI Technical Summary

Problems solved by technology

[0005] The super-large-span curved cable-stayed bridge is a combination of curved main girder and cable-stayed bridge. The structure is complex. The curved main girder must bear the combined action of bending moment, shear force and torque at the same time, and its bridge tower structure bears huge unbalanced torsional internal forces. , leading to the rotation failure of the bridge tower support, and the design calculation and analysis of its cables are difficult, which makes it very difficult to control the internal force balance in the construction stage

[0006] Until today, there is still no curved cable-stayed bridge with super long span built in the world. Ruck Bridge has become the most famous unbuilt bridge in the world. The cable-tower-beam of the bridge-stayed bridge produces coupled vibration, which makes it very difficult to control the cantilever assembly construction of the post-tensioned prestressed space cable-stayed cable surface

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