CN102345292A - Composite prestressed uplift pile with expansion heads - Google Patents
Composite prestressed uplift pile with expansion heads Download PDFInfo
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- CN102345292A CN102345292A CN2011102044941A CN201110204494A CN102345292A CN 102345292 A CN102345292 A CN 102345292A CN 2011102044941 A CN2011102044941 A CN 2011102044941A CN 201110204494 A CN201110204494 A CN 201110204494A CN 102345292 A CN102345292 A CN 102345292A
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- steel strand
- enlarged footing
- strand cable
- prestress steel
- uplift pile
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Abstract
The invention discloses a composite prestressed uplift pile with expansion heads, which comprises a cement stirring pile, a concrete cylindrical core and a carrying table top, wherein the concrete cylindrical core is arranged in the cement stirring pile, and the carrying table top is arranged at the upper end of the cement stirring pile. The composite prestressed uplift pile is characterized in that a prestress steel cable is coaxially arranged inside the concrete cylindrical core, at least one expansion head is arranged on the prestressed steel cable, and the upper end of the prestressed steel cable passes out of the carrying table top and is fixed through a connecting element after being tensioned. The composite prestressed uplift pile has the advantages that good anti-floating and uplift effects are realized, the preparation is simple, and the steel consumption is low.
Description
Technical field
The present invention relates to building field, be specifically related to uplift pile.
Background technology
Building pile foundation is main with pressure-bearing usually, because the development and use of the underground space in recent years, underground garage newly-built in a large number causes the pile foundation anti-floating to become new hot issue.Traditional uplift pile great majority adopt the nonprestressed reinforcement concrete structure, and reinforcing bar makes the pile body radial contraction when longitudinal tensile; Cause the soil and the frictional force of stake to reduce; Simultaneously, behind the pile body crack in tension, be embedded in the easy corrosion of underground reinforcing bar, can influence the pressure-bearing and the tension of stake equally.In recent years, the industry is constantly released prestress steel strand cable resistance to plucking, anti-floating stake, but its complex manufacturing process, and steel using amount is also more.
Summary of the invention
The technical problem that the present invention will solve provides a kind of composite prestressed uplift pile that has enlarged footing, has anti-floating, resistance to plucking effect preferably, and preparation is simple, and steel using amount is few.
The present invention realizes through following technical scheme:
A kind of composite prestressed uplift pile that has enlarged footing; Comprise cement mixing method; Concrete column core in the cement mixing method; Be arranged at the cushion cap face of cement mixing method upper end; Characteristics are the concrete column in-core prestress steel strand cables that have been coaxially set; At least be provided with an enlarged footing on the said prestress steel strand cable, steel strand cable upper end is provided with the fixed connecting piece after the stretch-draw, and said steel strand cable upper end and connector thereof are positioned at the cushion cap face.
The further improvement project of the present invention is that when the prestress steel strand cable was provided with an enlarged footing, said enlarged footing was arranged at the lower end of prestress steel strand cable.First enlarged footing that is arranged at the lower end is a concrete precast element, and said concrete precast element is provided with the hole, and the lower end of prestress steel strand cable is passed said hole and connected fixing.
The present invention further improvement project is that when the prestress steel strand cable was provided with an above enlarged footing, said enlarged footing set gradually from the lower end of prestress steel strand cable from bottom to top.
When the prestress steel strand cable was provided with two enlarged footings, first enlarged footing was arranged at the lower end of prestress steel strand cable, and first enlarged footing is a concrete precast element, and second enlarged footing that is positioned at first enlarged footing top is bonded in the prestress steel strand cable; Or second enlarged footing that is positioned at first enlarged footing top still is concrete precast element, and said concrete precast element is provided with the hole, and the lower end of prestress steel strand cable is passed said hole and connected fixing.
Prestress steel strand cable top is provided with sleeve pipe, bottom and column core bonding (being roughly 1/2nd following positions of pile foundation height).
The present invention compared with prior art has following obvious advantage:
One, because steel strand cable bottom is provided with enlarged footing, concrete prefabricated intensity is high, has significantly reduced concentrating of local stress.
Two, the concrete on enlarged footing and top thereof and cement mixing method are linked to be semi-rigid integral body, on the frictional force of pulling out spread to the peripheral soil body, improved the bearing capacity of prestressing force composite pile.
Three, the intensity of steel strand cable be general reinforced steel bar strength 5-8 doubly, saved a large amount of steel.
Description of drawings
Fig. 1 is the vertical cross-sectional schematic of the present invention (being provided with an enlarged footing).
Fig. 2 is the vertical cross-sectional schematic of the present invention (being provided with two enlarged footings).
The specific embodiment
As shown in Figure 1, the present invention includes cement mixing method 1, the concrete column core 2 in the cement mixing method 1 is arranged at the cushion cap face 3 of cement mixing method upper end.
Still as shown in Figure 1; Prestress steel strand cable 4 (steel strand cable 4 and the 2 concentric settings of column core) has been coaxially set in the concrete column core 2; The lower end of said steel strand cable 4 is provided with first enlarged footing 6; Steel strand cable 4 upper ends are provided with the fixed connecting piece after the stretch-draw, and said steel strand cable upper end and connector thereof are positioned at the cushion cap face.Connector adopts anchor clamp in the present embodiment.
Still as shown in Figure 1, first enlarged footing 6 is a concrete precast element, and said concrete precast element is provided with the hole, and the lower end of prestress steel strand cable 4 is passed said hole and connected fixing (connector adopts anchor clamp in the present embodiment, also can use the extruding anchor) through connector.
Still as shown in Figure 1, prestress steel strand cable 4 tops are provided with sleeve pipe 8, bottom and column core 2 bondings.
The present invention prepares process: at first preparation has first enlarged footing (concrete precast element) of centre bore; Steel strand cable lower end is passed the centre bore of first enlarged footing and connected fixing with anchor clamp; Remove the steel strand cable roughly the sleeve pipe at 1/4th following positions (the steel strand cable itself has sleeve pipe, and sliding agent is arranged in the sleeve pipe.If the steel strand cable is not established outer tube, then need add sleeve pipe and pipe in-lubricant in addition), said steel strand cable passed from bottom to top vibrate into pipe; Then, will vibrate into pipe and put into cement mixing method, pipe is upwards moved back on limit vibration, limit; Simultaneously to the pipe in fluid concrete, until desired location.Pour into a mould the cushion cap face again, treat that column core, cushion cap face reach setting intensity post tensioning steel strand cable,, adopt the hole (steel strand cable upper end and connector are embedded in the cushion cap face) on the expansion concrete pouring cushion cap face more then with anchor clamp locking steel strand cable.
As shown in Figure 2, the lower end of said prestress steel strand cable 4 is provided with two enlarged footings (first enlarged footing 6, second enlarged footing 9) from bottom to top successively.Preparation process: said steel strand cable passed from bottom to top vibrate into pipe, then, will vibrate into pipe and put into cement mixing method; Pipe is upwards moved back on limit vibration, limit, and fluid concrete in pipe impacts downwards with a hammer more simultaneously; Make concrete to bulging all around, thereby form second enlarged footing.All the other are implemented like embodiment 1.
Claims (7)
1. composite prestressed uplift pile that has enlarged footing; Comprise cement mixing method; Concrete column core in the cement mixing method; Be arranged at the cushion cap face of stake upper end; It is characterized in that: the concrete column in-core prestress steel strand cable that has been coaxially set; Steel strand cable upper end is provided with the fixed connecting piece after the stretch-draw, and said steel strand cable upper end and connector thereof are positioned at the cushion cap face.
2. a kind of composite prestressed uplift pile that has enlarged footing as claimed in claim 1 is characterized in that: be provided with an enlarged footing on the said prestress steel strand cable at least.
3. a kind of composite prestressed uplift pile that has enlarged footing as claimed in claim 2, it is characterized in that: when the prestress steel strand cable was provided with an enlarged footing, said enlarged footing was arranged at the lower end of prestress steel strand cable.
4. a kind of composite prestressed uplift pile that has enlarged footing as claimed in claim 3; It is characterized in that: first enlarged footing that is arranged at the lower end is a concrete precast element; Said concrete precast element is provided with the hole, and the lower end of prestress steel strand cable is passed said hole and connected fixing.
5. a kind of composite prestressed uplift pile that has enlarged footing as claimed in claim 2, it is characterized in that: when the prestress steel strand cable was provided with an above enlarged footing, said enlarged footing set gradually from the lower end of prestress steel strand cable from bottom to top.
6. a kind of composite prestressed uplift pile that has enlarged footing as claimed in claim 5; It is characterized in that: when the prestress steel strand cable is provided with two enlarged footings; First enlarged footing is arranged at the lower end of prestress steel strand cable, and second enlarged footing that is positioned at first enlarged footing top is bonded in the prestress steel strand cable; Or second enlarged footing that is positioned at first enlarged footing top still is concrete precast element, and said concrete precast element is provided with the hole, and the lower end of prestress steel strand cable is passed said hole and connected fixing.
7. a kind of composite prestressed uplift pile that has enlarged footing as claimed in claim 1 or 2, it is characterized in that: prestress steel strand cable top is provided with sleeve pipe, bottom and column core bonding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110204494.1A CN102345292B (en) | 2011-07-21 | 2011-07-21 | A kind of composite prestressed uplift pile with enlarged footing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110204494.1A CN102345292B (en) | 2011-07-21 | 2011-07-21 | A kind of composite prestressed uplift pile with enlarged footing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102345292A true CN102345292A (en) | 2012-02-08 |
| CN102345292B CN102345292B (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110204494.1A Active CN102345292B (en) | 2011-07-21 | 2011-07-21 | A kind of composite prestressed uplift pile with enlarged footing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644279A (en) * | 2012-04-28 | 2012-08-22 | 从卫民 | Uplift pile with prestress reinforced plastic rods |
| CN103015412A (en) * | 2012-12-24 | 2013-04-03 | 从卫民 | Composite uplift pile provided with prestress core material with variable cross-section |
| CN103015411A (en) * | 2012-12-24 | 2013-04-03 | 从卫民 | Composite compression pile provided with prestress core material |
| CN104294823A (en) * | 2014-10-13 | 2015-01-21 | 安徽天筑建设（集团）有限公司 | Anti-floating pile structure of pre-stressed pipe pile and construction method |
| CN105256831A (en) * | 2014-03-21 | 2016-01-20 | 刘献刚 | Building structure of underground space |
| CN105256830A (en) * | 2014-01-24 | 2016-01-20 | 刘献刚 | Building structure of underground space |
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| JPH09111758A (en) * | 1995-10-17 | 1997-04-28 | Kajima Corp | Cast-in-place concrete pile and construction method thereof |
| CN1619063A (en) * | 2004-12-08 | 2005-05-25 | 重庆交通科研设计院 | Post stress method stake body prestressed antislid stake and construction method |
| CN101148875A (en) * | 2007-11-05 | 2008-03-26 | 山东省机械施工有限公司 | Composite pile and construction method thereof |
| CN101550695A (en) * | 2009-02-10 | 2009-10-07 | 叶长青 | Construction method of reinforcing broken stump by using prestress steel twist-beam replacement grouting method |
| CN101761074A (en) * | 2008-10-10 | 2010-06-30 | 上海强劲基础工程有限公司 | Method for improving bearing capacity and tensile capacity of tubular pile end |
| CN101798810A (en) * | 2009-02-20 | 2010-08-11 | 上海强劲基础工程有限公司 | Cement-soil composite pile inserted into reinforced concrete core materials |
| CN202194130U (en) * | 2011-07-21 | 2012-04-18 | 从卫民 | Compound pre-stressed anti-pulling pile with enlarged head |
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2011
- 2011-07-21 CN CN201110204494.1A patent/CN102345292B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043133A (en) * | 1976-07-21 | 1977-08-23 | Yegge Lawrence R | Structure and method of constructing and test-loading pile anchored foundations |
| JPS59195933A (en) * | 1983-04-18 | 1984-11-07 | Ishikawajima Harima Heavy Ind Co Ltd | Prestressed concrete pile |
| JPH093888A (en) * | 1995-06-20 | 1997-01-07 | Minoru Tomita | Reverse friction pile |
| JPH09111758A (en) * | 1995-10-17 | 1997-04-28 | Kajima Corp | Cast-in-place concrete pile and construction method thereof |
| CN1619063A (en) * | 2004-12-08 | 2005-05-25 | 重庆交通科研设计院 | Post stress method stake body prestressed antislid stake and construction method |
| CN101148875A (en) * | 2007-11-05 | 2008-03-26 | 山东省机械施工有限公司 | Composite pile and construction method thereof |
| CN101761074A (en) * | 2008-10-10 | 2010-06-30 | 上海强劲基础工程有限公司 | Method for improving bearing capacity and tensile capacity of tubular pile end |
| CN101550695A (en) * | 2009-02-10 | 2009-10-07 | 叶长青 | Construction method of reinforcing broken stump by using prestress steel twist-beam replacement grouting method |
| CN101798810A (en) * | 2009-02-20 | 2010-08-11 | 上海强劲基础工程有限公司 | Cement-soil composite pile inserted into reinforced concrete core materials |
| CN202194130U (en) * | 2011-07-21 | 2012-04-18 | 从卫民 | Compound pre-stressed anti-pulling pile with enlarged head |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644279A (en) * | 2012-04-28 | 2012-08-22 | 从卫民 | Uplift pile with prestress reinforced plastic rods |
| CN103015412A (en) * | 2012-12-24 | 2013-04-03 | 从卫民 | Composite uplift pile provided with prestress core material with variable cross-section |
| CN103015411A (en) * | 2012-12-24 | 2013-04-03 | 从卫民 | Composite compression pile provided with prestress core material |
| CN103015411B (en) * | 2012-12-24 | 2015-05-20 | 从卫民 | Composite compression pile provided with prestress core material |
| CN105256830A (en) * | 2014-01-24 | 2016-01-20 | 刘献刚 | Building structure of underground space |
| CN105256831A (en) * | 2014-03-21 | 2016-01-20 | 刘献刚 | Building structure of underground space |
| CN104294823A (en) * | 2014-10-13 | 2015-01-21 | 安徽天筑建设（集团）有限公司 | Anti-floating pile structure of pre-stressed pipe pile and construction method |
| CN104294823B (en) * | 2014-10-13 | 2016-08-24 | 杭州江润科技有限公司 | A kind of construction method of pile for prestressed pipe anti-floating pile raft structure |
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| Publication number | Publication date |
|---|---|
| CN102345292B (en) | 2016-01-27 |
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