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Method for enhancing durability of pier column under freeze thawing or chlorine salt erosion environment

A technology of durability and pier column, which is applied to the pier column of concrete cast-in-place construction, improves the durability of the pier column under the environment of freezing and thawing or chloride salt erosion, and can solve the loss of the concrete protection function of the pier column and the failure of the performance to reach the design goal. , organic coating peeling and other problems, to achieve the effect of shortening offshore operation time, significant technical and economic benefits, and saving maintenance costs

Inactive Publication Date: 2014-08-20
SHANDONG HI SPEED QINGDAO HIGHWAY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of permeable formwork lining can significantly improve the freeze-thaw cycle resistance and chloride ion erosion resistance of the surface concrete, but the depth of improvement is limited, often only a few millimeters
The quality of coating application and silane impregnation is not only affected by the quality of the concrete within the protective layer, but also by the site operating conditions, and its performance often does not meet the design goals
Especially at sea, marine organisms such as barnacles and oysters can seriously damage the integrity of the coating, which can lead to large-scale peeling off of the organic coating in just a few years, making it lose its protective function on the pier concrete

Method used

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  • Method for enhancing durability of pier column under freeze thawing or chlorine salt erosion environment
  • Method for enhancing durability of pier column under freeze thawing or chlorine salt erosion environment
  • Method for enhancing durability of pier column under freeze thawing or chlorine salt erosion environment

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Embodiment Construction

[0024] combine figure 1 , figure 2 and image 3 , a formwork for improving the durability of piers in a freeze-thaw or chlorine salt erosion environment, including pier formwork 1, 8 and a sheath 4 with high freeze-thaw durability and / or chlorine salt erosion resistance; preferably, the above-mentioned sheath An energy-absorbing material layer can be pasted on the inner side of the cover, and the above-mentioned energy-absorbing material layer can be a plastic foam layer. The above-mentioned sheath is fixed on the inner wall of the pier formwork, and adopts a detachable connection structure with the pier formwork. When the concrete pouring of the pier column is completed and the form removal condition is met, the sheath has been combined with the pier column concrete 7, and the pier column formwork is removed to separate the pier column formwork from the sheath, and the sheath is left on the surface of the pier column.

[0025] A method for improving the durability of pier...

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Abstract

The invention discloses a template and method for enhancing the durability of a pier column under a freeze thawing or chlorine salt erosion environment; the template comprises a pier column template and a sheath which is provided with high freeze thawing durability and / or chlorine salt erosion resistance, wherein the sheath is fixed on the inner wall of the pier column template; a detachable connecting structure is adopted between the sheath and the pier column template; when pier column concrete is cast and a mold releasing condition is satisfied, the sheath and the pier column concrete are combined together; the pier column template is detached, so that the pier column template is separated from the sheath; and the sheath is left on the surface of the pier column. According to the invention, through using the prefabricated sheath with excellent durability as a pier column protective measure, the durability of the pier column can be obviously enhanced, the cofferdam transferring speed can be increased in the construction period, the offshore operation time is greatly reduced, a large amount of maintenance cost can be saved in the operation period, and obvious technical and economic benefits are obtained.

Description

technical field [0001] The invention relates to a formwork for improving the durability of pier columns under freeze-thaw or chloride-salt erosion environments, and a method for improving the durability of pier columns under freeze-thaw or chloride-salt erosion environments, and is especially suitable for freeze-thaw cycles or chlorine-salt erosion environments. Concrete cast-in-place construction piers under erosive conditions. Background technique [0002] The beam-column structure is the main form of cross-river, cross-river, sea-crossing or offshore engineering. A large number of engineering examples show that the part in the tidal range area and wave splash area is the first to be corroded due to freeze-thaw cycle damage or chloride corrosion. , thereby shortening the normal service life of the structure. When designing the durability of the structure, some protection measures have been taken for the tidal range area and the splash area, such as the use of high-perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00
Inventor 郭保林邵新鹏罗玉萍马立国栾桂玺赵宁刘士林陈桂芳魏功槐郑子腾
Owner SHANDONG HI SPEED QINGDAO HIGHWAY
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