CN112064627A - Freeze-proofing taper cylinder pile foundation in frozen soil area and construction process thereof - Google Patents
Freeze-proofing taper cylinder pile foundation in frozen soil area and construction process thereof Download PDFInfo
- Publication number
- CN112064627A CN112064627A CN201910496673.3A CN201910496673A CN112064627A CN 112064627 A CN112064627 A CN 112064627A CN 201910496673 A CN201910496673 A CN 201910496673A CN 112064627 A CN112064627 A CN 112064627A
- Authority
- CN
- China
- Prior art keywords
- pile foundation
- frozen soil
- conical
- soil area
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/14—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against frost heaves in soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to an anti-freezing tapered cylinder pile foundation in a frozen soil area, which is a tapered cylinder pile foundation with the upper part being a tapered cylinder; and a hole is formed between the conical column pile foundation and the backfilling hole wall. The invention also discloses a construction process of the pile foundation. The invention has simple structure, low cost and convenient construction, and effectively avoids the occurrence of the phenomenon of pile foundation freeze-drawing.
Description
Technical Field
The invention relates to the field of engineering of frozen soil areas, in particular to an anti-freezing tapered cylinder pile foundation for a frozen soil area and a construction process thereof.
Background
The Chinese territory is vast, wherein the frozen soil area accounts for about 75 percent of the Chinese territory, the application of the pile foundation in the frozen soil area is wide, and the pile foundation frozen-out is one of the foundation diseases in the frozen soil area. The frost heaving of the soil body is closely related to the frost heaving property of the soil body, and the frost heaving of the pile foundation in the frozen soil area is mainly caused by the seasonal freeze-thaw process.
In the freezing and thawing process of frozen soil, when the temperature is reduced to be lower than the freezing temperature of the soil body, water is transferred to the freezing soil body and phase change occurs, and the volume is increased. In the process, liquid water in the soil body is solidified and filled into gaps of soil particles in the form of ice, and frost heaving of the soil body is caused to generate frost heaving force when volume expansion of water phase change in the soil body is enough to cause relative displacement between the soil particles.
In the frozen soil active layer freeze thawing process, the level frost heaving force around the traditional cylinder pile foundation increases, and pile foundation and frozen soil active layer contact surface friction resistance increases, and the pile foundation is tightly "embraced" by peripheral active layer frozen soil, and the tangential frost heaving force that pile foundation and frozen soil active layer contact surface formed makes the pile body upwards take place the displacement, forms the pile foundation and freezes and pulls out the phenomenon. The freeze-drawing effect is accumulated along with the prolonging of the service time of the pile foundation, which easily causes the uneven deformation of a building foundation or other engineering foundations to cause damage to buildings and the like, and finally cannot be used.
Disclosure of Invention
The invention aims to solve the technical problem of providing the anti-freezing conical column pile foundation for the frozen soil area, which has a simple structure and does not have the freezing and pulling phenomenon.
The invention aims to solve another technical problem of providing a construction process of the freeze-proof tapered cylinder pile foundation in the frozen soil area.
In order to solve the problems, the invention provides an anti-freezing tapered cylinder pile foundation in a frozen soil area, which is characterized in that: the pile foundation is a conical column pile foundation with the upper part being a conical column body; and a hole is formed between the conical column pile foundation and the backfilling hole wall.
The construction process of the freeze-proofing tapered cylinder pile foundation in the frozen soil area is characterized by comprising the following steps of: after drilling in the frozen soil layer, placing a steel reinforcement cage in the drilled hole, and simultaneously placing a conical column template above the drilled hole; then pouring concrete; removing the conical cylindrical steel template after the concrete reaches the design strength to form a conical cylindrical pile foundation; at the moment, a hole is formed between the backfilling hole wall and the conical column pile foundation; and finally, backfilling the pores to finish the pile foundation construction.
The upper diameter of the conical cylindrical steel template is smaller than the lower diameter of the conical cylindrical steel template, and the lower diameter of the conical cylindrical steel template is equal to the diameter of the drill hole.
Compared with the prior art, the invention has the following advantages:
1. the upper part of the pile foundation is a conical cylinder body, the friction resistance of the contact surface of the pile foundation and the frozen soil active layer is increased in the process of freezing and thawing of the frozen soil at the periphery of the pile foundation, the pile foundation is tightly held by the frozen soil of the peripheral active layer, but because the diameter of the upper part of the conical cylinder body is smaller than that of the lower part of the conical cylinder body, the pile foundation cannot be displaced upwards when the tangential frost heaving force formed by the contact surface of the pile foundation and the frozen soil active layer acts again, and the pile foundation cannot be frozen and pulled out.
2. The invention has simple structure, low cost and convenient construction.
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 schematic view of the construction process of the present invention.
In the figure: 1-frozen soil layer; 2-conical column pile foundation; 3-pores; 4-conical cylindrical steel template; and 5, a reinforcement cage.
Detailed Description
As shown in fig. 1, the anti-freezing tapered cylinder pile foundation in the frozen soil area refers to a tapered cylinder pile foundation 2 with a tapered cylinder at the upper part; a hole 3 is arranged between the conical column pile foundation 2 and the backfill hole wall.
The construction process of the freeze-proofing tapered column pile foundation in the frozen soil area comprises the following steps: after drilling in the frozen soil layer 1, placing a reinforcement cage 5 in the drilled hole, and simultaneously placing a conical column template 4 above the drilled hole; then pouring concrete; removing the conical cylindrical steel template 4 after the concrete reaches the design strength to form a conical cylindrical pile foundation 2; at the moment, a hole 3 is formed between the backfilling hole wall and the conical column pile foundation 2; finally, the hole 3 is backfilled to finish the pile foundation construction (see figure 2).
Wherein: the upper diameter of the conical cylindrical steel template 4 is smaller than the lower diameter, and the lower diameter is equal to the diameter of the drilled hole.
The upper portion of awl cylinder pile foundation 2 is the awl cylinder, and in its 1 freeze thawing process of peripheral frozen soil layer, awl cylinder pile foundation 2 is embraced by peripheral active layer frozen soil, and awl cylinder pile foundation 2 and frozen soil active layer contact surface friction resistance increase, but because of the diameter above the awl cylinder is less than following diameter, the tangential frozen expansive force that awl cylinder pile foundation 2 and frozen soil active layer contact surface formed can't make the pile body upwards take place the displacement, makes the pile foundation can not take place to freeze and pulls out the phenomenon.
Examples of the applications
The permafrost region of a research station (positioned in the abdominal land of the Qinghai-Tibet plateau, 34 degrees to 51.2 degrees in northern latitude, 56.4 degrees in east longitude and 92 degrees, and 4628 meters in altitude) for comprehensive observation of the permafrost project and environment of the north foot river of the Qinghai-Tibet plateau is located, and when foundation iron fence transformation is carried out in 2017, the foundation of the fence is completely constructed by the conical column pile foundation, and no frozen-out phenomenon is found after the transformation.
Claims (3)
1. The utility model provides a frozen soil area prevents frostbite and pulls out awl cylinder pile foundation which characterized in that: the pile foundation is a conical column pile foundation (2) with the upper part being a conical column body; and a hole (3) is formed between the conical column pile foundation (2) and the backfill hole wall.
2. The construction process of the frost-proof tapered column pile foundation in the frozen soil area as claimed in claim 1, wherein: after drilling in the frozen soil layer (1), placing a steel reinforcement cage (5) in the drilled hole, and simultaneously placing a conical column template (4) above the drilled hole; then pouring concrete; removing the conical cylindrical steel template (4) after the concrete reaches the design strength to form a conical cylindrical pile foundation (2); at the moment, a pore (3) is formed between the backfilling pore wall and the conical column pile foundation (2); and finally, backfilling the hole (3) to finish the pile foundation construction.
3. The construction process of the freeze-proofing tapered column pile foundation in the frozen soil area as claimed in claim 2, wherein: the upper diameter of the conical cylindrical steel template (4) is smaller than the lower diameter, and the lower diameter is equal to the diameter of the drilled hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910496673.3A CN112064627A (en) | 2019-06-10 | 2019-06-10 | Freeze-proofing taper cylinder pile foundation in frozen soil area and construction process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910496673.3A CN112064627A (en) | 2019-06-10 | 2019-06-10 | Freeze-proofing taper cylinder pile foundation in frozen soil area and construction process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112064627A true CN112064627A (en) | 2020-12-11 |
Family
ID=73658200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910496673.3A Withdrawn CN112064627A (en) | 2019-06-10 | 2019-06-10 | Freeze-proofing taper cylinder pile foundation in frozen soil area and construction process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112064627A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865990A (en) * | 2021-09-27 | 2021-12-31 | 吉林大学 | Device for simulating drawing test of concrete pile in frozen soil layer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817380A (en) * | 2012-02-20 | 2012-12-12 | 中国科学院寒区旱区环境与工程研究所 | Measure for enhancing electric transmission line tower footing frozen soil foundation stability |
| CN205134353U (en) * | 2015-11-17 | 2016-04-06 | 西安建筑科技大学 | Prevent frostbite and pull out and melt a heavy assembly type ventilation stake foundation structure |
| RU170150U1 (en) * | 2015-12-30 | 2017-04-17 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" (ТИУ) | Vertical earthing switch for permafrost soils |
| CN206298902U (en) * | 2016-12-19 | 2017-07-04 | 西安建筑科技大学 | A kind of concrete pile foundation structure with inside and outside ventilation duct |
| CN108225651A (en) * | 2018-01-09 | 2018-06-29 | 石家庄铁道大学 | A kind of permafrost region tapered pile tangent coordinate system distribution tests Experimental Method in Laboratory and its experimental rig used |
| CN208056133U (en) * | 2018-01-09 | 2018-11-06 | 石家庄铁道大学 | A kind of experimental rig of unitary variant assessment tapered pile anti_freeze uplift performance |
-
2019
- 2019-06-10 CN CN201910496673.3A patent/CN112064627A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817380A (en) * | 2012-02-20 | 2012-12-12 | 中国科学院寒区旱区环境与工程研究所 | Measure for enhancing electric transmission line tower footing frozen soil foundation stability |
| CN205134353U (en) * | 2015-11-17 | 2016-04-06 | 西安建筑科技大学 | Prevent frostbite and pull out and melt a heavy assembly type ventilation stake foundation structure |
| RU170150U1 (en) * | 2015-12-30 | 2017-04-17 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" (ТИУ) | Vertical earthing switch for permafrost soils |
| CN206298902U (en) * | 2016-12-19 | 2017-07-04 | 西安建筑科技大学 | A kind of concrete pile foundation structure with inside and outside ventilation duct |
| CN108225651A (en) * | 2018-01-09 | 2018-06-29 | 石家庄铁道大学 | A kind of permafrost region tapered pile tangent coordinate system distribution tests Experimental Method in Laboratory and its experimental rig used |
| CN208056133U (en) * | 2018-01-09 | 2018-11-06 | 石家庄铁道大学 | A kind of experimental rig of unitary variant assessment tapered pile anti_freeze uplift performance |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865990A (en) * | 2021-09-27 | 2021-12-31 | 吉林大学 | Device for simulating drawing test of concrete pile in frozen soil layer |
| CN113865990B (en) * | 2021-09-27 | 2024-04-19 | 吉林大学 | Device for simulating drawing test of concrete pile in frozen soil layer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204982931U (en) | Freeze proof bloated photovoltaic support basis | |
| CN104762955B (en) | A kind of Belled Pile construction method based on freezing process | |
| CN101096852B (en) | Method for anti-floating of underground building | |
| CN109487777B (en) | Method for reinforcing deep soft soil foundation by adopting pressure grouting to form combined anchor pile | |
| CN104343111A (en) | Composite foundation for reinforcing thick sand soil layer by using node piles | |
| CN112392039A (en) | Cold region anti-freezing pile pulling body structure | |
| CN112064627A (en) | Freeze-proofing taper cylinder pile foundation in frozen soil area and construction process thereof | |
| CN212612585U (en) | Anti-freezing pile foundation in severe cold area | |
| CN111910621A (en) | Structure for cooling frozen soil by combining cast-in-place bored concrete pile in perennial frozen soil area with heat pipe | |
| CN107663863A (en) | A kind of Permafrost Area pile foundation and its construction technology | |
| CN104164895A (en) | Basement generating no water buoyant force | |
| CN203361150U (en) | Composite anti-floating anchor pile | |
| CN102943480B (en) | Loess foundation pit supporting method | |
| CN204000846U (en) | Floral tube slip casting uplift pile | |
| CN207794115U (en) | A kind of recyclable water sealing structure of foundation pit freezing supporting | |
| CN207362837U (en) | A kind of concrete filled steel tube carrier pile | |
| RU2441115C1 (en) | Pile with increased resistance to swelling | |
| CN220486413U (en) | Microporous bored concrete pile rock anchor rod composite foundation of photovoltaic power station | |
| CN212153412U (en) | Anchor pulling anti-slide pile suitable for karst cavity | |
| CN205259175U (en) | Lower part enlarges compound foundation pile of diameter section | |
| CN214219626U (en) | Joint reinforcement pressure-bearing water-rich sandy gravel stratum deep-buried station system | |
| CN116752554B (en) | High slope support system based on controlled cement grouting and implementation method | |
| CN204899393U (en) | Prevent transmission line cement pole up -pull structure | |
| CN214884227U (en) | Prevent that ground from sinking and causing construction equipment of damage to municipal drainage pipe network | |
| CN210127498U (en) | Permafrost region pile foundation anti-freezing-pulling structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201211 |
|
| WW01 | Invention patent application withdrawn after publication |