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Concrete construction method for extreme cold area in low temperature season

A technology for alpine regions and concrete, applied in water conservancy projects, hydroelectric power stations, buildings, etc., can solve the problems of long construction period and other problems, and achieve the effect of wide geographical scope and industry scope, strong operability, and easy supply.

Inactive Publication Date: 2008-12-10
中国安能建设集团有限公司
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AI Technical Summary

Problems solved by technology

For a long time, due to the lack of scientific methods and means, construction is often stopped during the low temperature season in these alpine regions, and the construction period of the project is relatively long

Method used

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  • Concrete construction method for extreme cold area in low temperature season
  • Concrete construction method for extreme cold area in low temperature season
  • Concrete construction method for extreme cold area in low temperature season

Examples

Experimental program
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Effect test

Embodiment Construction

[0042] The basic process of concrete construction technology in the low temperature season in the alpine region is shown in figure 1 .

[0043] 1. Construction operation steps:

[0044] 1. Selection of raw materials:

[0045] (1) Do a good job in the inspection and analysis of sand and gravel aggregates. In particular, it directly affects the design of concrete mix ratio parameters and technical indicators such as fineness modulus, needle-like content, firmness and alkali activity of concrete quality. Medium and coarse sand with good gradation should be selected, and fine sand should be avoided; gravel or pebbles with good firmness and alkali activity can be used. If pebbles are used, pebbles with large needle-like flake content should be avoided. In the mixing station (building), a sand and gravel aggregate finished material storage yard should be set up to filter and stabilize the sand and gravel aggregate to ensure that the water content of the aggregate used for concret...

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Abstract

The invention provides a concrete construction method for high-cold areas in low temperature seasons. In the construction method, a whole set of construction standards and specifications for the selection of raw materials, the mixture ratio design of concrete, concrete position, heat preservation during transportation, concrete mixture and pouring, temperature monitoring, concrete maintenance after pouring and other aspects is formulated, so the method solves problems caused by the conventional concrete construction of hydropower projects in high-cold areas and low temperature seasons.

Description

technical field [0001] The invention relates to a concrete construction method for hydropower projects, in particular to a concrete construction method for hydropower projects in low temperature seasons. Background technique [0002] The quality of concrete is an important part of the quality of construction projects. The durability of concrete is an important determinant of the life of concrete engineering structures. The concrete surface damaged by freezing and thawing will expand and shrink, disintegrate, weather and erode. After a long time, the overall concrete structure may be seriously damaged. Some projects cannot operate normally because the concrete structure is damaged by freezing and thawing. [0003] In high-altitude cold regions such as Tibet and Qinghai, the daily average temperature is low and the temperature difference between day and night is very large. It is basically in winter from November to March of the next year, and the low temperature season last...

Claims

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Application Information

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IPC IPC(8): E02B9/00E04G21/02
CPCY02E10/20
Inventor 林伟赵秀玲詹登民田维忠
Owner 中国安能建设集团有限公司
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