Ground-anchored-self-anchored suspension combined system bridge

Abstract

The invention relates to a ground-anchored-self-anchored suspension combined system bridge which belongs to the technical field of constructional engineering and particularly relates to a design of a long-span bridge under a complex geologic condition in bridge engineering. The ground-anchored-self-anchored suspension combined system bridge is characterized in that after a tower and a lateral hole pier are constructed, a concrete main girder of a cable-stayed bridge begins to be assembled through a cantilever; after the cantilever is assembled to a lateral hole, a main cable is suspended, one end thereof is anchored on a permanent anchor block, the other end thereof is anchored on a concrete girder external anchor block, and the anchor blocks are pulled on a temporary anchor through temporary anchor cables; the end of a main girder provided with the permanent anchor block is horizontally supported on a bridge abutment; each segment of a main steel girder in a span is hoisted through a cable crane; after folding, the temporary anchor cables are dismantled in batches, and the main cable is completely anchored at the end part of the main girder to finish the system switching from the temporary anchor to a self-anchor. The invention has the effects and advantages that material performance is fully exerted, and by aiming at the complex geologic condition, the huge anchor is saved, the construction cost is lowered, the construction period is shortened, and the risk in the construction process is reduced.

Description

technical field [0001] The invention belongs to the technical field of construction engineering and relates to the design of bridges in bridge engineering, in particular to the design of long-span bridges. Background technique [0002] At present, the following types of bridges are usually used in the design of long-span bridges: [0003] 1. Cable-stayed bridge [0004] The cable-stayed bridge with the largest span that has been built now is the Tatara Bridge in Japan, with a span of 890m. However, when the cantilever span of the cable-stayed bridge reaches about 500m during construction, its aerodynamic stability is really worrying. At the same time, its axial horizontal pressure will increase rapidly with the increase of the cantilever span. Buckling instability will occur near the tower. [0005] 2. Suspension Bridge [0006] The suspension bridge with the largest span is the Akashi Kaikyo Bridge in Japan, with a main span of 1991m. However, the amount of steel used ...

AI Technical Summary

Problems solved by technology

The proposed schemes are all ground anchor systems, which require huge anchors, which are difficult to construct and expensive to construct.

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