Ground-anchored-self-anchored suspension combined system bridge

A system and ground anchor technology, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as high engineering cost, difficult construction, and huge anchorage, and achieve the goal of reducing engineering cost, saving materials, and reducing risks Effect

CN101736685AInactive Publication Date: 2010-06-16DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-06-16
Estimated Expiration
Not applicable · inactive patent

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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.
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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 ...

Examples

Embodiment Construction

[0029] The specific implementation manner of the present invention will be described in detail below in combination with the technical scheme and accompanying drawings.

[0030] After the main girder of the cable-stayed bridge is assembled in place, the main cable is suspended. One end of the main cable is anchored to the permanent tunnel anchor, and the other end is anchored to the temporary anchor block. The intermediate steel box girder is hoisted, and after the main girder is closed, the temporary anchor cables are removed to complete the conversion of the main cable system, and then the cable force of the whole bridge is adjusted.

[0031] Main girder section: part of the main girder of the cable-stayed bridge adopts the concrete box girder section, and the part of the suspension bridge adopts the steel box girder section.

[0032] Material properties: C50 concrete is used for part of the main girder and wet joints of the cable-stayed bridge, and C30 concrete is used for ...