CN210127498U - Permafrost region pile foundation anti-freezing-pulling structure - Google Patents
Permafrost region pile foundation anti-freezing-pulling structure Download PDFInfo
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- CN210127498U CN210127498U CN201920463544.XU CN201920463544U CN210127498U CN 210127498 U CN210127498 U CN 210127498U CN 201920463544 U CN201920463544 U CN 201920463544U CN 210127498 U CN210127498 U CN 210127498U
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Abstract
The utility model relates to an anti structure that pulls out of freezing of permafrost region pile foundation, including arranging the intraformational pile foundation of permafrost in, its characterized in that: the pile foundation on the upper limit of the frozen soil is provided with a pile casing, and the hole wall of the pile foundation where the pile casing is located is provided with a protective layer; and a non-frost heaving filler with a contractible volume is arranged between the protective layer and the protective sleeve. The utility model discloses frost-resistant effectual, the cost is low, the construction is simple, can effectively solve the frozen problem of pulling out of permafrost region pile foundation.
Description
Technical Field
The utility model relates to a permafrost region engineering field especially relates to an anti structure of pulling out that freezes of permafrost region pile foundation.
Background
The permafrost region has serious foundation diseases, wherein the frost heaving of the pile foundation is one of the foundation diseases, and the frost heaving of the pile foundation in the permafrost region is mainly caused by the seasonal freezing and thawing process of the permafrost active layer and is closely related to the frost heaving property of the soil body of the active layer. The frost heaving force of the permafrost movable layer can enable the pile body to move upwards, namely the common frost heaving phenomenon in a frost region, and the frost heaving effect is accumulated along with the prolonging of the service time of the pile foundation, so that the building foundation or other engineering foundations are easily subjected to uneven deformation to cause damage to buildings and the like, and finally the permafrost movable layer cannot be used.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a frost-resistant structure of pulling out of permafrost region pile foundation frost resistance that effectual, the cost is low, the construction is simple is provided.
In order to solve the problem, a permafrost region pile foundation anti-freezing structure of pulling out, including arranging permafrost intraformational pile foundation in, its characterized in that: the pile foundation on the upper limit of the frozen soil is provided with a pile casing, and the hole wall of the pile foundation where the pile casing is located is provided with a protective layer; and a non-frost heaving filler with a contractible volume is arranged between the protective layer and the protective sleeve.
The diameter of the pile casing is equal to the diameter of the pile foundation under the upper limit of the frozen soil.
The lower end of the pile casing is positioned below the upper limit of the frozen soil.
The pile foundation aperture where the pile casing is located is larger than the diameter of the pile foundation under the upper limit of the frozen soil.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses fill non-frost heaviness nature filler between a protecting section of thick bamboo and protective layer, the effect of protective layer lies in that the prevention soil granule gets into inside the non-frost heaviness nature filler.
2. The utility model discloses under well lower extreme of protecting a section of thick bamboo is in frozen soil upper limit, along with the influence of freezing and thawing in season, frozen soil upper limit directly acts on the filler to the frozen expansive force that surface portion produced, because the filler has certain volume shrinkage property, the frozen expansive force has been cushioned to the volume shrinkage, makes frozen expansive force can not act on the pile foundation to the pile foundation can not produce the frozen-out phenomenon yet.
3. In order to reduce the frost heaving nature on seasonality freeze thawing soil layer, the utility model discloses pass through the drilling construction grooving at the contact surface on pile foundation and permafrost movable layer, the inslot intussuseption is filled with non-frost heaving nature material, forms a buffer area between pile week natural soil layer and pile foundation, changes the frost heaving force, especially tangential frost heaving force, can effectively solve the frozen-out problem of permafrost region pile foundation.
4. The utility model discloses it is effectual, the cost is low, the construction is simple to pull out to freeze proof.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partial enlarged view a of the present invention.
In the figure: 1-permafrost layer; 2-pile foundation; 3-a filler; 4, protecting the cylinder; 5, a protective layer; 6-upper limit of frozen soil.
Detailed Description
As shown in figures 1-2, the anti-frost-heaving structure of the permafrost region pile foundation comprises a pile foundation 2 arranged in a permafrost layer 1. The pile foundation 2 on the upper limit 6 of the frozen soil is provided with a pile casing 4, and the hole wall of the pile foundation 2 where the pile casing 4 is positioned is provided with a protective layer 5; and a non-frost heaving filler 3 with a contractible volume is arranged between the protective layer 5 and the protective sleeve 4.
Wherein: the diameter of the casing 4 is equal to the diameter of the pile foundation 2 below the upper limit 6 of the frozen soil.
The lower end of the casing 4 is below the upper limit 6 of the frozen soil.
The aperture of the pile foundation 2 where the pile casing 4 is located is larger than the diameter of the pile foundation 2 under the upper limit 6 of the frozen soil.
In the permafrost layer 1, the permafrost below the upper limit of the permafrost 6 cannot cause the frost heaving of the pile foundation 2, and only the tangential frost heaving force formed by the permafrost above the upper limit of the permafrost 6 is considered to cause the frost heaving of the pile foundation 2.
A construction method of a permafrost region pile foundation anti-freezing-pulling structure comprises the following steps:
⑴ when hole is formed by the pile pouring machine in permafrost 1, the upper part is a surface layer enlarged hole whose drill is bigger than the lower part, the diameter of the drilled hole is bigger than the diameter of the pile, the lower part is a conventional drilled hole whose diameter is the same as the diameter of the pile, the depth of the enlarged hole is bigger than the thickness of the active layer, i.e. it is deeper than the upper limit of frozen soil 6, the lower end of the upper part is over the upper limit of frozen soil 6.
⑵ a casing 4 with the same diameter as the lower part is arranged on the upper part, the lower end of the casing 4 is aligned with the hole wall of the lower part, and the inner wall of the casing 4 is flat and smooth.
⑶ A protective layer 5 is laid on the upper part of the hole wall, and the protective layer 5 is used for preventing soil particles in the permafrost layer 1 from entering the filler 3.
⑷ the filler 3 having non-frost heaving volume contractible property is filled between the casing 4 and the protective layer 5.
⑸ placing the tied reinforcement cage in the hole, pouring concrete to form pile foundation 2. at this moment, a buffer layer is formed between pile foundation 2 and the movable layer soil around the natural enlarged hole, when frost heaving is generated, the buffer layer shrinks, thawing frost heaving force, when frost heaving is weakened, the buffer layer volume rebounds gradually to restore the volume, thus solving the problem of pile foundation frost heaving through the volume circulation expansion of the buffer layer.
Claims (4)
1. The utility model provides a structure that permafrost region pile foundation anti-freezing was pulled out, includes pile foundation (2) of arranging in permafrost layer (1), its characterized in that: the pile foundation (2) positioned on the upper limit (6) of the frozen soil is provided with a pile casing (4), and the hole wall of the pile foundation (2) where the pile casing (4) is positioned is provided with a protective layer (5); and a non-frost heaving filler (3) with a contractible volume is arranged between the protective layer (5) and the protective cylinder (4).
2. The permafrost region pile foundation frost-uplift resistant structure of claim 1, wherein: the diameter of the pile casing (4) is equal to the diameter of the pile foundation (2) below the upper limit of the frozen soil (6).
3. The permafrost region pile foundation frost-uplift resistant structure of claim 1, wherein: the lower end of the protective cylinder (4) is positioned below the upper limit (6) of the frozen soil.
4. The permafrost region pile foundation frost-uplift resistant structure of claim 1, wherein: the aperture of the pile foundation (2) where the pile casing (4) is located is larger than the diameter of the pile foundation (2) under the upper limit of the frozen soil (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920463544.XU CN210127498U (en) | 2019-04-08 | 2019-04-08 | Permafrost region pile foundation anti-freezing-pulling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920463544.XU CN210127498U (en) | 2019-04-08 | 2019-04-08 | Permafrost region pile foundation anti-freezing-pulling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210127498U true CN210127498U (en) | 2020-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920463544.XU Active CN210127498U (en) | 2019-04-08 | 2019-04-08 | Permafrost region pile foundation anti-freezing-pulling structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794291A (en) * | 2019-04-08 | 2020-10-20 | 中国科学院寒区旱区环境与工程研究所 | Anti-freeze-drawing structure of pile foundation in permafrost region and construction method thereof |
| CN113089733A (en) * | 2021-04-28 | 2021-07-09 | 东北农业大学 | Anti frozen swelling destroys elastic pile basis |
-
2019
- 2019-04-08 CN CN201920463544.XU patent/CN210127498U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111794291A (en) * | 2019-04-08 | 2020-10-20 | 中国科学院寒区旱区环境与工程研究所 | Anti-freeze-drawing structure of pile foundation in permafrost region and construction method thereof |
| CN113089733A (en) * | 2021-04-28 | 2021-07-09 | 东北农业大学 | Anti frozen swelling destroys elastic pile basis |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20200716 Address after: 730000 No.318, Donggang West Road, Chengguan District, Lanzhou City, Gansu Province Patentee after: NORTHWEST INSTITUTE OF ECO-ENVIRONMENT AND RESOURCES, CAS Address before: Chengguan District of Gansu city of Lanzhou province Donggang West Road 730000 No. 320 Patentee before: Institute of environment and Engineering in cold and dry areas, Chinese Academy of Sciences |
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| TR01 | Transfer of patent right |