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Steel box girder unloading construction method

A construction method and technology of steel box girder, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as inability to achieve, achieve the effect of ensuring safety, reducing working time at heights, and reducing the risk of installers

Active Publication Date: 2020-06-05
SINOHYDRO BUREAU 11 CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, the current unloading method relies on the high-altitude in-situ assembly method supported by the tire frame to construct and unload the steel box girder. When there is no support or tire frame for arranging the jack, the above method will not be realized

Method used

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  • Steel box girder unloading construction method
  • Steel box girder unloading construction method

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Embodiment Construction

[0055] Such as figure 1 , figure 2 As shown, the unloading construction method of the steel box girder comprises the following steps:

[0056] Step 1, the preloading and unloading device 3 is placed on the segmental assembly bridge erecting machine 1, and the segmental assembly bridge erection machine 1 moves to the bridge pile 10;

[0057] Step 2, install the unloading device 3 on the segmental assembly bridge erecting machine 1;

[0058] Step 3, hoisting the segmental steel box girder 12;

[0059] Step 4, docking the upper boom 4 and the lower boom 6, and suspending the segmental steel box girder 12;

[0060] Step 5, assembling and welding the fixed segmental steel box girder 12 to form a full-span steel box girder and unload it;

[0061] In step 6, the bottom surface of the whole-span steel box girder is separated from the balance beam 9 .

[0062] Further, in step 1, the following steps are included:

[0063] Step 1.1, assemble the unloading device 3, the unloading ...

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Abstract

The invention belongs to the technical field of steel bridge construction, and particularly relates to a steel box girder unloading construction method which comprises the following steps that 1, an unloading device is preassembled on a segment assembling bridge girder erection machine, and the segment assembling bridge girder erection machine moves to a bridge rectifier; 2, the unloading device is installed on the segment assembling bridge girder erection machine; 3, hoisting the segmental steel box girder; 4, butting the upper suspender and the lower suspender, and suspending the segmental steel box girder; 5, assembling and welding the fixed section steel box girder to form a whole-span steel box girder, and unloading the whole-span steel box girder; and 6, separating the bottom surfaceof the whole-span steel box girder from the balance beam. The method has the beneficial effects that the sinking speed can be effectively controlled, so that the unloading process is stable, balanced, synchronous, unified and orderly, and the construction quality and the personnel safety can be reliably guaranteed.

Description

technical field [0001] The invention belongs to the technical field of steel bridge construction, and in particular relates to a steel box girder unloading construction method. Background technique [0002] The unloading of the steel box girder is a key process in the construction. Its purpose is to remove the bracket or tire frame used to support the steel box girder during the construction process, and finally convert it into steel due to the force of the bracket or tire frame during the assembly and welding process. The self-loading of the box girder structure makes the steel box girder body completely separated from the support, and keeps the elevation of the steel box girder and the linearity after completion of the bridge consistent with the design size and shape. The unloading process is carried out after the assembly and welding of the steel box girder is completed. During the unloading process, each support point is required to be coordinated in a reasonable order, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D2/04
CPCE01D2/04E01D21/00
Inventor 卢俊生孙建国李有道王显鹤闫现啟
Owner SINOHYDRO BUREAU 11 CO LTD
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