Cable-stayed bridge construction method

A construction method and technology of cable-stayed bridges, applied to cable-stayed bridges, bridges, bridge parts, etc., can solve problems such as reducing the economy of bridge construction, restricting the development of long-span bridges, and increasing the load of towers and anchorages, etc., to achieve Avoid the instability of large cantilever, reduce the difficulty of implementation, and optimize the effect of beam section

Active Publication Date: 2015-07-15
DONGHONG CONSTR
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Problems solved by technology

[0006] However, the former will increase the self-weight of the beam, resulting in an increase in the load of the tower and anchorage; the latter increases the bridge structure, increases the difficulty of construction, and reduces the economy of bridge construction
These factors restrict the development of long-span bridges

Method used

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Embodiment Construction

[0052] figure 1 Shows the force diagram of a beam section in a cable-stayed bridge, where the cable 3 connecting the beam section 41 is slanted to the pylon 2, the beam section 41 is subjected to the pulling force T of the cable 3, and the pulling force T can be decomposed into horizontal direction The force H and the vertical force V. When the traditional construction method is adopted, that is, the main girder of the cable-stayed bridge is installed from near the tower to the mid-span, the force H accumulates as the length of the main girder installation increases, that is, the continuous accumulated compressive stress is formed on the main girder, and the design must be large enough In order to ensure the rigidity of the main beam, the span of the bridge is restricted. In the construction method of the present invention, the remote tower is installed first, and the load is transferred to the tower through the cable. The opposite force on the other side of the tower and beam ...

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Abstract

The invention provides a cable-stayed bridge construction method. According to the design idea, in the conventional construction method, a cable-stayed bridge main beam is arranged on a far tower position firstly instead of being arranged from a near-tower position to mid-span, and the load is delivered onto a tower through a cable. Opposite force on the other sides of tower and the beam is synchronously delivered onto a beam and a tower on the other side or an anchorage, and the beam carries tensile stress, so that the rigidity of the main beam is enhanced greatly. When the cable-stayed bridge construction method is applied to a long-span bridge, the beam section does not need to be increased, and the dead weight can be reduced by applying a high-strength material. Compared with other bridge types, the spanning capability and economical efficiency of a bridge constructed on the basis of the method are superior.

Description

Technical field [0001] The invention relates to the field of bridge construction, in particular to a construction method of a cable-stayed bridge. Background technique [0002] Cable-stayed bridge, also known as cable-stayed bridge, is a kind of bridge in which the main girder is directly pulled on the tower with many cables. It is composed of a pressure-bearing tower, a tensioned cable and a pressure-bearing beam body. A kind of structural system. It can be regarded as a multi-span elastically supported continuous beam with cables instead of buttresses. The cable-stayed bridge is mainly composed of pylons, main beams, and stayed cables. [0003] The long-span cable-stayed bridge has the risk of instability and damage before closing. The following two methods are usually adopted to reduce this risk: [0004] 1. Enlarge the section to improve rigidity; [0005] 2. Increase wind resistance and stability structure. [0006] However, the former will increase the self-weight of the beam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D19/14
CPCE01D11/04E01D19/14E01D21/00
Inventor 张跃平
Owner DONGHONG CONSTR
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