Construction method of steel cofferdam used for reinforcing underwater pier

A construction method and bridge pier reinforcement technology, applied in bridge reinforcement, bridge, bridge maintenance, etc., can solve problems such as limited construction space, secondary damage to bridges, impossibility of implementation, etc., achieve small construction area occupied, short preparation period, and auxiliary equipment little effect

Inactive Publication Date: 2009-11-11
四川盛大交通科研设计有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction of the steel cofferdam for pier reinforcement is affected by the completed bridge, and the available construction space is very limited. In this case, the method of splicing and sinking the steel cofferdam for pier reinforcement with a large floating crane cannot be implemented
The construction method of inserting steel pipe piles around the pier foundation that needs to be reinforced, and then setting up a construction platform on the water to carry out the overall subsid

Method used

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  • Construction method of steel cofferdam used for reinforcing underwater pier
  • Construction method of steel cofferdam used for reinforcing underwater pier
  • Construction method of steel cofferdam used for reinforcing underwater pier

Examples

Experimental program
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Effect test

Embodiment 2

[0046] The construction method of the steel cofferdam for underwater pier reinforcement of the present invention, in addition to completing the assembly of the first segment of the steel cofferdam 4 on the steel frame 2, the steel cofferdam 4 is assembled with the steel cofferdam sinking block 9 Put water under the first section or inject water into it so that the top surface is 1-1.5m above the water surface, and then complete the assembly of the second section of the steel cofferdam 4 on the steel frame 2, and use the cofferdam The second section of the steel cofferdam 4 is lowered by the block block 9 until the bottom surface of the second section is located at the top surface of the first section, and then the connection between the first section and the second section is completed and merged into the water Sink until the top surface of the second section is 1-1.5m above the water surface, and repeat this until the assembly of all sections of the entire steel cofferdam 4 is...

Embodiment 3

[0048] The construction method of the steel cofferdam for underwater pier reinforcement of the present invention is the same as that of the embodiment except that the steel girder 10 forming the steel frame 2 is composed of a steel composite beam, and the crane 5 placed on the bridge deck 13 is a crawler crane. 1 is the same.

Embodiment 4

[0050] The construction method of the steel cofferdam for underwater pier reinforcement of the present invention is the same as that of Embodiment 1 except that the steel girder 10 forming the steel frame 2 is made of steel pipe girders, and the crane 5 placed on the bridge deck 13 is a gantry crane. .

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PUM

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Abstract

The invention relates to a construction method of a steel cofferdam used for reinforcing an underwater pier, which utilizes a steel frame hung on a bridge girder body to complete the on-site assembly and the overall subsidence construction of the steel cofferdam used for reinforcing the underwater pier and comprises the following construction steps of: A. designing and processing the steel frame according to the characteristics of the cross section of the pier with need of reinforcement and the characteristics of the steel cofferdam; B. arranging a hanging strip on the girder body at the top of the pier with need of reinforcement and completing the installation of the steel frame; C. using a crane to hoist and hang the cross-bridge directional steel cofferdam block sections block by block on the steel frame; D. using the crane to hoist and hang the bridge directional steel cofferdam block sections block by block on the steel frame; E. completing the connection among the steel cofferdam block sections hung on the steel frame and arranging guide devices on the inner wall of the steel cofferdam; F. arranging a pulley block used for the sinking of the steel cofferdam on the steel frame and the steel cofferdam; and G. starting the pulley block used for the sinking of the steel cofferdam and leading the steel cofferdam to sink in place. The method resolves the difficult problem in the construction of the steel cofferdam used for reinforcing the underwater pier.

Description

Technical field: [0001] The invention belongs to the field of bridge construction, and in particular relates to a construction method of a steel cofferdam for underwater pier reinforcement. Background technique: [0002] Due to design defects, construction quality accidents, earthquakes or other natural disasters, ship collisions and overloading, more and more completed bridges need to be reinforced. If there are cracks or other diseases in the underwater pier body of the bridge pier that has been built, it is best to first install a steel cofferdam within a certain range around the pier with problems, and then pour water between the outer wall of the pier and the steel cofferdam. Concrete is used to reinforce it. In traditional construction, the steel cofferdam is used as a temporary facility for the underwater foundation construction of the bridge, and is sunk in place before the construction of the bridge structure. Under normal circumstances, the sinking construction o...

Claims

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Application Information

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IPC IPC(8): E02D19/04E01D22/00
Inventor 王祥张佐安牟行勇甘洪冯强林羊勇何雁罗洋
Owner 四川盛大交通科研设计有限公司
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