Winter maintenance method for short-line-matching box girder construction

A technology of short-line matching and box girder construction, which is applied in the direction of erecting/assembling bridges, bridges, bridge construction, etc., can solve the problems of poor surface quality, easy cracks on the surface of box girders, and long construction period of box girders, etc., to achieve reasonable setting, Improve construction efficiency and save construction period

Active Publication Date: 2017-07-11
CCCC SHEC FOURTH ENG
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of long construction period of box girder in the prior art, easy cracks on the surface of box girder, poor surface quality and other problems, and provides a winter maintenance method for box girder construction of short-line matching method, us

Method used

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Embodiment 1

[0032] A kind of winter maintenance method of short-line matching method box girder construction of this embodiment, it is the maintenance method in short-line matching box girder prefabricated pedestal,

[0033] The steps are as follows:

[0034] Step (1) Pouring of box girders: Pouring of box girders at the pouring place. The formwork of the pouring box girders is all steel formwork, and the outer surface of the steel formwork is fully covered with thermal insulation materials. At the same time, a thermometer is inserted into the thermal insulation material of the steel formwork. Specifically In this embodiment, the insulation material in step (1) is rubber and plastic sponge. By covering the outer surface of the steel formwork with insulation material, it can effectively avoid the large temperature difference between the inside and outside of the poured box girder, which will cause cracks in the poured box girder. occur;

[0035] Step (2) Insulation treatment of the roof o...

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Abstract

The invention provides a winter maintenance method for short-line-matching box girder construction, and belongs to the field of engineering construction. The winter maintenance method includes the step (1) of pouring of a pouring box girder, the step (2) of heat preservation of a top plate of the pouring box girder, the step (3) of moving of the pouring box girder to a matching position to use the pouring box girder as a matching box girder after the strength of the pouring box girder meets requirements, and manufacturing of a new pouring box girder at a pouring position by repeating the steps (1) and (2), the step (4) of heat preservation of the matching box girder, and the step (5) of removing of a heat preservation hood and multiple heat preservation layers on the top plate of the matching box girder after the required temperature in the heat preservation hood is obtained, using of the new pouring box girder as a new matching box girder through the step (3) after the matching box girder reaches the room temperature and is hoisted, and repeating of the steps (4) and (5) to complete winter maintenance of short-line-matching box girder construction. By adopting the technical scheme, shrinkage cracks are not prone to being generated on the surfaces of the box girders, the quality is guaranteed, the box girders are arranged reasonably and simply in the construction maintenance process, and the construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of engineering construction, and more specifically relates to a winter maintenance method for box girder construction using a short-line matching method. Background technique [0002] In concrete construction, the quality of the project is limited by the ambient temperature, especially in winter construction. Due to the low ambient temperature, it has a great impact on the maintenance and quality of the entire construction; after the concrete is poured, the temperature and humidity should be guaranteed during the maintenance process. In place, affected by the low temperature, the hydration of the cement is hindered, the free moisture in the concrete begins to freeze, and the volume increases, which will easily cause cracking of the concrete and seriously affect the construction quality. When the average daily outdoor temperature is lower than 5°C for 5 consecutive days, it belongs to winter construction. In ...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D2/04E04G21/24
CPCE01D2/04E01D21/00E04G21/246
Inventor 夏辉周桥种爱秀张六一刘立海杨康孙发明尤琦
Owner CCCC SHEC FOURTH ENG
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