Precast box beam concrete construction method in winter in cold region

A technology of cold area and construction method, applied in the direction of manufacturing tools, ceramic molding machines, etc., can solve the problems of unsteady maintenance temperature and humidity, imperfect construction technology in winter, etc., and achieve scientific construction technology, guaranteed strength, and simple operation. Effect

Pending Publication Date: 2017-09-15
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention provides a winter prefabricated box girder concrete construction method in cold regions. The winter prefabricated box girder concre

Method used

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  • Precast box beam concrete construction method in winter in cold region

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Embodiment

[0062] As mentioned above, according to the air temperature in the box girder prefabrication area, especially for the construction under cold winter conditions, a set of construction technology has been formulated by using the steam curing greenhouse combined with the temperature controller to automatically control the temperature and humidity. The construction steps are as follows:

[0063] ① Prefabrication and pouring preparation stage of box girder, mainly including inspection of steam boiler and pipeline, temperature measurement of on-site sand and gravel aggregate, steam delivery of steam boiler, concrete mixing water heating and other preparatory work:

[0064] (1.1) Collect the local weather forecast, record and measure the temperature t1 during construction, try to avoid pouring concrete when the temperature is low; try to choose the daytime when the temperature is high for the pouring time, and cover the raw materials such as sand and gravel yards with sheds to avoid ra...

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Abstract

The invention provides a precast box beam concrete construction method in winter in a cold region. The precast box beam concrete construction method comprises the following steps: preparing to pour, manufacturing a template and pouring the template, carrying out quality testing, preparing to maintain, carrying out maintenance, and carrying out natural curing. According to the precast box beam concrete construction method, steam is adopted to heat and stir concrete aggregate; after pouring forming, a steam maintenance greenhouse is adopted to carry out constant-temperature and constant-humidity maintenance on the precast box beam structure, so that the normal implementation of the precast box beam concrete construction in the cold winter is ensured, the concrete strength is also ensured, and the standard maintenance condition is basically met; and the related temperature control adopts the manner that temperature sensors are pre-embedded in and out of a component, the operation is simple, the temperature control is accurate and sensitive, and the construction technology is more scientific.

Description

technical field [0001] The invention relates to a winter prefabricated box girder concrete construction method in a cold region, belonging to the field of concrete prefabricated component production. Background technique [0002] During the construction of bridges and highways, box girder components are generally prefabricated first, and then transported to the construction site for assembly. The prefabricated box girder is affected by the structure (the existence of the box makes the concrete structure have an internal cavity), if the construction measures are not taken properly, not only the strength of the component concrete will not keep up, but it will also easily cause the temperature difference between the inside and outside of the concrete during curing. Project quality accidents such as concrete cracks or hidden dangers to the project quality. [0003] In view of the problems existing in concrete construction in winter, the main methods currently used are: adjustin...

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Application Information

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IPC IPC(8): B28B23/02B28B11/24C04B28/00
CPCC04B28/00B28B11/245B28B23/02
Inventor 陈波赵继勇居浩李刚高传彬李波
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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