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Method for elastically restraining main beam displacement of ultrahigh-span cable-stayed bridge

An elastic constraint, cable-stayed bridge technology, applied in bridges, bridge parts, bridge construction, etc., can solve the problems of the impact of the main beam and the limit device, the large end displacement of the super-span cable-stayed bridge, etc., to improve the stress of the bridge structure. , Improve stability and safety, the effect of relative displacement mitigation

Inactive Publication Date: 2014-04-23
CHINA MAJOR BRIDGE ENERGINEERING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the large end displacement of super-long-span cable-stayed bridges, the existing restraint schemes cannot solve the problem of limiting the displacement of the main girder to a reasonable range, controlling the internal force of the main tower, and avoiding the impact between the main girder and the limit device. question

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  • Method for elastically restraining main beam displacement of ultrahigh-span cable-stayed bridge
  • Method for elastically restraining main beam displacement of ultrahigh-span cable-stayed bridge
  • Method for elastically restraining main beam displacement of ultrahigh-span cable-stayed bridge

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Embodiment Construction

[0022] In the present invention, after the construction of the main tower 3 is completed, a permanent support is installed on the top surface of the main tower beam 4, the zero section of the main beam 5 is installed, a temporary consolidation is set between the main tower beam 4 and the main beam 5, and the main cantilever assembly is continued. From the beam to the maximum cantilever, install the spring device 1 on the top surface of the main tower beam 4 before the main beam 5 is closed, the upper connecting plate 6 of the spring device 1 is connected to the bottom surface of the main beam 5, and the lower connecting plate 8 is connected to the top surface of the main tower beam 4, After the main girder is closed, the temporary consolidation is released, and then the follow-up construction is carried out.

[0023] refer to figure 1 , figure 2 , the present invention arranges support 2 on the main tower beam top surface. A spring device 1 is arranged between the main towe...

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Abstract

The invention relates to a method for elastically restraining main beam displacement of an ultrahigh-span cable-stayed bridge. The method comprises the following steps: after construction of main towers, arranging permanent supports on the top surfaces of main tower transverse beams; arranging zero segments of main beams; arranging temporary concretion between the main tower transverse beams and the main beams; assembling cantilevers with the main beams into largest cantilevers; before folding of the main beams, arranging spring devices on the top surfaces of the main tower transverse beams; connecting upper connecting plates of the spring devices with the bottom surfaces of the main beams, and connecting lower connecting plates with the top surfaces of main tower transverse beams; after folding of the main beams, removing the temporary concretion; performing subsequent construction. The spring devices are arranged among the main tower transverse beams of the ultrahigh-span cable-stayed bridge along the longitudinal direction of the bridge, elastic restraint is provided for the main beams by using the spring recovery force, and the main beams are controlled to perform longitudinal displacement under the action of static power load. The displacement of the main beams can be effectively controlled, the inner stress of the main tower is reduced, the extension and contraction amounts of a beam end extension and retraction device and a rail extension and retraction adjusting device are reduced, and the driving stability and safety of the bridge surface are improved. The method is applied to the Hu-Tong highway-railway dual-purpose cable-stayed bridge being 1,092 meters in length.

Description

technical field [0001] The invention relates to a method for elastically constraining the displacement of a main girder of a super-large-span cable-stayed bridge. Background technique [0002] The cable-stayed bridge is a bridge-type structure with a large spanning capacity. With the development of bridge construction technology, the span of the cable-stayed bridge has been continuously updated. 6-lane roads and 4-lane railways have large spans and heavy loads. Under the action of live loads and wind loads, the main girder will have large beam end displacements. It is necessary to adopt an appropriate plan to constrain the displacement of the main girder. According to the traditional practice, the damping constraint scheme, the limit constraint scheme or the damping + limit constraint scheme are generally adopted between the tower beams. The above constraint scheme has the following disadvantages: [0003] (1) The damping constraint scheme, the damper installed between the...

Claims

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Application Information

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IPC IPC(8): E01D19/00E01D19/04E01D21/00
Inventor 高宗余徐伟梅新咏肖海珠张燕飞彭振华徐力郑清刚张建强胡文军罗扣侯健龚俊刘厚军
Owner CHINA MAJOR BRIDGE ENERGINEERING
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