CN202194130U - Compound pre-stressed anti-pulling pile with enlarged head - Google Patents

Compound pre-stressed anti-pulling pile with enlarged head Download PDF

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Publication number
CN202194130U
CN202194130U CN2011202585863U CN201120258586U CN202194130U CN 202194130 U CN202194130 U CN 202194130U CN 2011202585863 U CN2011202585863 U CN 2011202585863U CN 201120258586 U CN201120258586 U CN 201120258586U CN 202194130 U CN202194130 U CN 202194130U
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Prior art keywords
steel strand
enlarged footing
strand cable
prestress steel
pile
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CN2011202585863U
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从卫民
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从卫民
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Abstract

The utility model discloses a compound pre-stressed anti-pulling pile with an enlarged head. The compound pre-stressed anti-pulling pile comprises a cement-soil mixing pile, a concrete cylindrical core in the cement-soil mixing pile, and a bearing platform arranged on the upper end of the cement-soil mixing pile, and is characterized in that a pre-stressed steel string which is at least provided with an enlarged head, the upper end of the pre-stressed steel string penetrates through the bearing platform and is fixedly connected through connecting pieces after being extended. The compound pre-stressed anti-pulling pile has excellent anti-floating and anti-pulling effects, is simple in manufacture, and less in steel used.

Description

A kind of composite prestressed uplift pile that has enlarged footing
Technical field
The utility model relates to building field, is 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 utility model 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 utility model is realized through following technical scheme:
A kind of composite prestressed uplift pile that has enlarged footing; Comprise cement mixing method, the concrete column core in the cement mixing method is 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 utility model 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 utility model 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 utility model 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 utility model (being provided with an enlarged footing).
Fig. 2 is the vertical cross-sectional schematic of the utility model (being provided with two enlarged footings).
The specific embodiment
Embodiment 1
As shown in Figure 1, the utility model comprises cement mixing method 1, and 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 utility model 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.
Embodiment 2
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 is 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. according to claim 1 or claim 2 a kind of composite prestressed uplift pile that has enlarged footing, it is characterized in that: prestress steel strand cable top is provided with sleeve pipe, bottom and column core bonding.
CN2011202585863U 2011-07-21 2011-07-21 Compound pre-stressed anti-pulling pile with enlarged head Active CN202194130U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN2011202585863U CN202194130U (en) 2011-07-21 2011-07-21 Compound pre-stressed anti-pulling pile with enlarged head

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102345292A (en) * 2011-07-21 2012-02-08 从卫民 Composite prestressed uplift pile with expansion heads
CN102787595A (en) * 2012-08-16 2012-11-21 岳建伟 Double-acting self-stressing combined uplift pile and pile forming method
CN102995635A (en) * 2012-12-17 2013-03-27 青岛昊河水泥制品有限责任公司 Prestressed concrete square pile and manufacturing method thereof
CN103015411A (en) * 2012-12-24 2013-04-03 从卫民 Composite compression pile provided with prestress core material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102345292A (en) * 2011-07-21 2012-02-08 从卫民 Composite prestressed uplift pile with expansion heads
CN102787595A (en) * 2012-08-16 2012-11-21 岳建伟 Double-acting self-stressing combined uplift pile and pile forming method
CN102787595B (en) * 2012-08-16 2014-06-04 河南大学 Double-acting self-stressing combined uplift pile and pile forming method
CN102995635A (en) * 2012-12-17 2013-03-27 青岛昊河水泥制品有限责任公司 Prestressed concrete square pile and manufacturing method thereof
CN102995635B (en) * 2012-12-17 2013-09-18 青岛昊河水泥制品有限责任公司 Prestressed concrete square pile and manufacturing method thereof
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

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