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

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 ...

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, using the method of the present invention The technical solution makes the surface of the box girder less prone to shrinkage cracks, and the surface quality is guaranteed. At the same time, the setting of the box girder during the construction and maintenance process is reasonable and simple, saving the construction period