Frost-uplifting resistant structure of pile foundation in permafrost region and construction method thereof

A technology for permafrost areas and pile foundations, applied in infrastructure engineering, protective devices, buildings, etc., can solve problems such as uneven deformation of buildings, unusability, accumulation, etc.

Pending Publication Date: 2020-10-20
COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The frost heaving force of the permafrost active layer will cause the pile body to move upwards, which is a common phenomenon of freezing and pulling in permafrost regions, and this freezing and pulling effect will accumulate with the prolongation of the use time of the pile foundation, which will easily cause the building foundation or Other engineering foundations produce uneven deformation and cause damage to buildings, etc., and eventually cannot be used

Method used

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  • Frost-uplifting resistant structure of pile foundation in permafrost region and construction method thereof
  • Frost-uplifting resistant structure of pile foundation in permafrost region and construction method thereof

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Embodiment Construction

[0024] like Figure 1~2 As shown, a structure for resisting freezing and pulling out of pile foundations in permafrost regions includes pile foundations 2 placed in permafrost layers 1 . The pile foundation 2 on the permafrost upper limit 6 is provided with a casing 4, and the hole wall of the pile foundation 2 where the casing 4 is located is provided with a protective layer 5; Non-frost heave filling 3.

[0025] Wherein: the diameter of the casing 4 is equal to the diameter of the pile foundation 2 under the upper limit 6 of frozen soil.

[0026] The lower end of casing 4 is below permafrost upper limit 6.

[0027] The aperture of the pile foundation 2 where the casing 4 is located is greater than the diameter of the pile foundation 2 under the permafrost upper limit 6 .

[0028] In the permafrost layer 1, the permafrost below the upper limit of 6 will not cause the pile foundation 2 to freeze and pull out, and only consider the tangential frost heaving force formed by th...

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Abstract

The invention relates to a frost-uplifting resistant structure of a pile foundation in a permafrost region. The frost-uplifting resistant structure comprises the pile foundation placed in a permafrostlayer, and is characterized in that a casing is arranged on the position, at the upper limit of frozen soil, of the pile foundation, and a protective layer is arranged on the hole wall of the position, where the casing is located, of the pile foundation; and a non-frost-heaving filling material with the shrinkable volume is arranged between the protective layer and the casing. The invention further discloses a construction method of the structure. According to the frozen and uplift resistant structure, the frozen and uplift resistant effect is good, the cost is low, the construction is simple, and the problem of freezing and uplifting of the pile foundation in the permafrost region can be effectively solved.

Description

technical field [0001] The invention relates to the field of engineering in permafrost regions, in particular to a structure for resisting freezing and pulling out of pile foundations in permafrost regions and a construction method thereof. Background technique [0002] The foundation diseases in the permafrost region are serious, and the pile foundation freezing and pulling is one of the foundation diseases, and the freezing and pulling of the pile foundation in the permafrost region is mainly caused by the seasonal freezing and thawing process of the active layer of the permafrost, which is different from the active layer soil. It is closely related to the frost heaving property of the body. The frost heaving force of the permafrost active layer will cause the pile body to move upwards, which is a common phenomenon of freezing and pulling in permafrost regions, and this freezing and pulling effect will accumulate with the prolongation of the use time of the pile foundation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D31/14E02D27/35
CPCE02D27/35E02D31/14
Inventor 陈继芮鹏飞吴青柏武贵龙刘国军
Owner COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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