A construction method for a cable-stayed bridge

A construction method and technology for cable-stayed bridges, applied in cable-stayed bridges, bridges, bridge parts, etc., can solve problems such as restricting the development of long-span bridges, reducing bridge construction economy, increasing tower and anchor loads, etc. The effect of avoiding the instability of the large cantilever, reducing the difficulty of implementation, and optimizing the beam section

Active Publication Date: 2017-04-05
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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  • A construction method for a cable-stayed bridge
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  • A construction method for a cable-stayed bridge

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Embodiment Construction

[0052] figure 1The force diagram of a beam section in the cable-stayed bridge is shown, in which the cable 3 connecting the beam section 41 is cabled to the tower 2, and the beam section 41 is subjected to the tension T of the cable 3, and the tension T can be decomposed into the 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, and the force H is continuously accumulated with the increase of the length of the main girder installation, that is, a continuous accumulation of compressive stress is formed on the main girder, which must be designed to be large enough. The cross-section of the bridge ensures the rigidity of the main girder, which in turn limits the span of the bridge. The construction method of the present invention is firstly installed at the far tower, and the load is transmitted to the tower through ...

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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 cable-stayed bridge construction method. Background technique [0002] Cable-stayed bridge, also known as cable-stayed bridge, is a bridge in which the main beam is directly pulled on the bridge tower with many cables. a structural system. It can be regarded as a multi-span elastic supporting continuous beam with stay cables instead of buttresses. Cable-stayed bridges are mainly composed of pylons, main beams and stay cables. [0003] Long-span cable-stayed bridges are at risk of instability and failure before closing. There are two common approaches to reducing this risk: [0004] 1. Enlarge the section to improve rigidity; [0005] 2. Increase the wind-resistant and stable structure. [0006] However, the former will increase the self-weight of the beam, resulting in an increase in the load of the tower and the anchorage; the latter will increase the bridge structure,...

Claims

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Application Information

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