Prestressed jacking method of main cable saddle of suspension bridge

A prestressed, main cable saddle technology, applied to suspension bridges, bridge forms, bridges, etc., to achieve the effect of leaving no hidden dangers in quality

Active Publication Date: 2019-06-21
中交四公局第六工程有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to solve a series of problems existing in the demolition process of the pre-embedded components currently used for jacking the main cable saddle of the suspension bridge, and to provide a prestressed jacking method for the main cable saddle of the suspension bridge, without affecting the quality of the bridge tower and Complete the push of the main saddle under the premise of appearance

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  • Prestressed jacking method of main cable saddle of suspension bridge
  • Prestressed jacking method of main cable saddle of suspension bridge
  • Prestressed jacking method of main cable saddle of suspension bridge

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specific Embodiment approach

[0021] (1) if figure 1 , figure 2 As shown, the top of the bridge tower 1 is provided with a main cable saddle 2 . When adjusting the main cable shape of the suspension bridge, it is necessary to push the main cable saddle along the direction of the bridge. When the present invention is pouring the bridge tower, 4 prestressed pipelines 3 running through the bridge tower concrete along the bridge direction are preset in the tower top concrete. There is a certain distance between the two prestressed pipes in each group, and the two groups of prestressed pipes are arranged symmetrically on both sides of the bridge tower along the centerline of the 1st bridge.

[0022] (2) if image 3 , Figure 4 As shown, after the main cable of the suspension bridge is erected and before the main cable type is adjusted, the prestressed steel strands 4 are respectively inserted into the four prestressed pipes 3, and the four prestressed steel strands 4 are directed towards the middle span of...

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Abstract

The invention provides a prestressed jacking method of a main cable saddle of a suspension bridge. The prestressed jacking method comprises the following steps: presetting 4 prestressed pipes, runningthrough bridge tower concrete along the bridge direction, in tower top concrete, inserting a prestressed steel strand into each prestressed pipe, connecting a tensioning jack to the end, facing the midspan of the bridge, of each prestressed steel strand, hoisting two jacking supports to the sidespan sides of a bridge tower by using a hoisting machine, and anchoring the ends, facing the sidespan of the bridge, of two steel strands in each group of prestressed pipes to one jacking support; simultaneously tensioning the steel strands by using the 4 tensioning jacks, and tensioning and fixing thetwo jacking supports to the side walls of the tower bridge; arranging jacking jacks on the two jacking supports respectively, and jacking the main cable saddle on the top of the tower bridge throughthe jacks so as to adjust the line shape of a main cable. By the prestressed jacking method, after jacking, the tensioning jacks are loosened, the jacking supports are detached and the prestressed pipes are plugged, so that the quality and the appearance of the tower bridge are not damaged.

Description

technical field [0001] The invention belongs to the technical field of suspension bridge construction and relates to a method for pushing the main cable saddle of the suspension bridge when the main cable shape of the suspension bridge is adjusted. Background technique [0002] After the main cable of the suspension bridge is erected, the main cable type needs to be adjusted. During the adjustment process, it is necessary to push the main cable saddle on the top of the bridge tower, and adjust the force of the bridge tower and the main cable by pushing the main cable saddle. linear. The current method of pushing the main cable saddle is to pre-embed the steel grid on the top of the bridge tower. Part of the steel grid is embedded in the concrete of the bridge tower, and a part is exposed to the outside of the bridge tower. The exposed part is used as a supporting structure for jacks. Provide support when applying jacking force to the main saddle. [0003] After the top of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D11/02E01D19/14
Inventor 杨德月孟祥源党彦锋单晓东杨浩张志龙王远航武彦杰刘佳刘洋段海海
Owner 中交四公局第六工程有限公司
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