CN102747727A - Prestressed concrete centrifugal square pile - Google Patents
Prestressed concrete centrifugal square pile Download PDFInfo
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- CN102747727A CN102747727A CN2012102686539A CN201210268653A CN102747727A CN 102747727 A CN102747727 A CN 102747727A CN 2012102686539 A CN2012102686539 A CN 2012102686539A CN 201210268653 A CN201210268653 A CN 201210268653A CN 102747727 A CN102747727 A CN 102747727A
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Abstract
The invention provides a prestressed concrete centrifugal square pile. The centrifugal square pile comprises a pile body, a reinforcement cage and concrete, wherein both ends of the pile body are provided with metal end plates connected with the reinforcement cage; the reinforcement cage comprises a framework main reinforcement and a reinforcement stirrup; the reinforcement stirrup is spirally and continuously welded on the framework main reinforcement; the pile body is square in appearance and the pile core is a cylindrical through hole; corners on four sides of the pile body are in stress relieving arc shapes; and the radius of the four circular arcs of the pile body is 5-9mm. The prestressed concrete centrifugal square pile has the advantages that the strength assurance rate of the centrifugal square pile is high and the construction damage rate is low; the pile body has a high concrete strength grade of C60-C80; the single pile can provide high bearing capacity; the economical efficiency is high; a prestressed member is used; the pile is light in self weight, convenient to transport and stack, and is not easily damaged during hoisting, transportation and transferring; end plates are adopted at both ends; piles are connected through welding; the piling integrity is good; and the pile body has high flexural rigidity, long pile segment and wide service range.
Description
Technical field
The present invention relates to the improvement of a kind of foundation pile shape and structure, especially a kind of prestress concrete offcenter squared pile.
Background technology
Existing prestress concrete offcenter squared pile and moulding form thereof; Like Chinese patent number be 200710068545.6 " prestress high intensity concrete square pile and manufacturing approach thereof and moulding form "; Its two ends are provided with the square metal end plate that is connected with reinforcing cage; Bevel for welding is established on two square metal end plates, four limits, and central authorities are circular holes, is provided with through wires hole and tension force hole between circular hole and four limits symmetrically; The stirrup of reinforcing cage shape in the shape of a spiral is welded on the main muscle continuously; The profile of pile body and end plate is square, and its four angles are small one and large one two pairs of circular arcs, and its arc chord angle is 90 ° of a pair of arc chord angles, arc radius 25-30mm, and another is to 90 ° of arc chord angles, arc radius 5-10mm; The stake heart is the columnar mesopore identical with end plate central circular hole diameter.The prestress high intensity concrete square pile that the moulding form of this patent of usefulness is processed; Main muscle in the reinforcing cage in its pile body is to be evenly distributed in the concrete of pile body edge; The tension stress that main muscle acts in the concrete in the pile body also is equally distributed; Because the cross section of whole stake is an asymmetrical design, the concrete that the two pairs of arc chord angle places are used is different, causes the concrete cover became uneven of each main muscle outerwrap; Thereby make pile body have open defect, influenced the good looking appearance and the quality of prestressed concrete square pile.
Traditional for another example side's stake, tube-sinking cast-in-situ pile etc.It is relatively low to show as bearing capacity of single pile, and bending resistance (drawing) shear behavior is poor, long construction period, and pile quality does not meet designing requirement; Piling well damage in transportation and the use causes the pile concrete durability bad.The preformed pile smooth in appearance, the frictional force of piling and soil layer is little.Also there be a kind of end that the prestressed centrifugally concrete square pile of end plate is arranged, from heavy and light, material-saving, lifting, convenient transportation, bearing capacity of pile is big.But its main muscle layout is reasonable inadequately, and poor as main muscle, pile body anti-bending strength with prestressed reinforcement or plain bars.End plate four limits do not have the welding groove, have influenced the pile connectivity robustness.The pile body cross section is a quadrangle, and pile body very easily damages for four jiaos in the building operations, causes whole stake to be scrapped, and not only causes waste, but also can influence construction speed.
Summary of the invention
The object of the invention aims to provide a kind of prestress concrete offcenter squared pile, and the production mechanization degree is high, and the quality assurance degree is high; From heavy and light, transportation, stacking are conveniently, and be not fragile when lifting, transportation, transhipment; The construction breakage rate is low, the pile good in integrity, and the pile body bending rigidity is big; Pile body construction length is darker, the wide concrete hollow preformed pile of the scope of application.
For realizing above-mentioned purpose; The technical scheme that the present invention adopts provides a kind of prestress concrete offcenter squared pile; This offcenter squared pile comprises pile body, reinforcing cage and concrete, and the two ends of said pile body are provided with the metal end plate that is connected with said reinforcing cage; Said reinforcing cage comprises skeleton master muscle and stirrup, and said stirrup shape in the shape of a spiral is welded on the said skeleton master muscle continuously; Said pile body profile is square, the stake heart is columnar through hole; Said pile body four limit corners are stress and eliminate circular arc, and wherein: the radius of four circular arcs of said pile body is all 5-9mm.
Effect of the present invention is: the high 30-100MPa of the more common side's stake of the pile strength of this offcenter squared pile, and the more common side's stake of construction breakage rate is low more than 10%; Concrete strength of pile is that C60-C80 is high-grade, and the bearing capacity that single pile can provide is high, good economy performance; Adopt prestressed member, from heavy and light, transportation, stacking are conveniently, and be not fragile when lifting, transportation, transhipment; End plate is adopted at two ends, and stake is adopted with stake and is welded to connect the pile good in integrity; The pile body bending rigidity is big, and pile cutoff is long, and the scope of application is wide.
Description of drawings
Fig. 1 is the structural representation of offcenter squared pile of the present invention;
Fig. 2 is the schematic cross-section of Fig. 1;
Fig. 3 is the structural representation of offcenter squared pile end plate of the present invention and cuff.
Among the figure:
1, reinforcing cage 2, concrete 3, metal end plate 4, main muscle
5, stirrup 6, bevel for welding 7, heading
The specific embodiment
In conjunction with accompanying drawing and embodiment prestress concrete offcenter squared pile structure of the present invention is explained.
Fig. 1, shown in 2; Prestress concrete offcenter squared pile of the present invention; This offcenter squared pile comprises pile body, reinforcing cage 1 and concrete 2, and the two ends of said pile body are provided with the metal end plate 3 that is connected with said reinforcing cage 1; Said reinforcing cage 1 comprises skeleton master muscle 4 and stirrup 5, and said stirrup 5 shape in the shape of a spiral is welded on the said skeleton master muscle 4 continuously; Said pile body profile is square, the stake heart is columnar through hole; Said pile body four limit corners are stress and eliminate circular arc, and the radius of four circular arcs of said pile body is all 5-9mm.
The profile of said metal end plate 3 is identical with the profile of said offcenter squared pile; Bevel for welding 6, central authorities that said metal end plate 3 four limits are provided with 45 degree inclination angles are circular holes identical with the median pore diameter of said offcenter squared pile.
Said skeleton master muscle 4 is a rod iron, and said skeleton master muscle 4 is parallel with the pile body outline line of said offcenter squared pile, and said skeleton master muscle 4 has heading 7 with said metal end plate 3 junctions.
Prestress concrete offcenter squared pile function of the present invention is achieved in that
Said offcenter squared pile comprises reinforcing cage 1 and concrete 2.Reinforcing cage 1 comprises skeleton master muscle 4 and stirrup 5, and stirrup 5 shape in the shape of a spiral is welded on the skeleton master muscle 4 continuously; Offcenter squared pile pile body profile is square, the stake heart is columnar through hole, and its four limits corner is stress and eliminates circular arc, and four circular arc R of said offcenter squared pile are all 5-9mm, and arc chord angle is similarly 90 degree.The pile body four limit corners of offcenter squared pile of the present invention are stress and eliminate circular arc, make piling not fragile when building operations transportation and hammering.
As shown in Figure 3; The two ends of said offcenter squared pile are provided with the metal end plate 3 that is connected with said reinforcing cage 1; The profile of said metal end plate 3 is identical with the pile body profile, and four limits of each metal end plate 3 are provided with the bevel for welding 6 at 45 degree inclination angles, has therefore strengthened the fastness that pile connects.
Said skeleton master muscle 4 as shown in Figure 1 is a rod iron, and said skeleton master muscle 4 is parallel with the pile body outline line of said offcenter squared pile, and said skeleton master muscle 4 has heading 7 with said metal end 3 junctions.
The step that employing the present invention prepares prestress concrete offcenter squared pile is following:
Place a pipe die, the two ends plate at reinforcing cage and two ends is placed wherein fluid concrete; Another piece pipe die that closes, and with the fastening of matched moulds bolt, implement to be put in centrifugal dehydration on the centrifuge behind the prestressed stretch-draw; Promptly form the stake of centrifugal concrete side; Steam-cured again to concrete strength be more than the C45, the demoulding steam to be pressed again or natural curing to concrete strength is more than the C80.
Multiple comparison test is carried out in prestress concrete offcenter squared pile of the present invention and unified specification pile tube and the common side's stake of unified specification obtained following data
Claims (3)
1. prestress concrete offcenter squared pile; This offcenter squared pile comprises pile body; Reinforcing cage (1) and concrete (2); The two ends of said pile body are provided with the metal end plate (3) that is connected with said reinforcing cage (1), and said reinforcing cage (1) comprises skeleton master muscle (4) and stirrup (5), and said stirrup (5) shape in the shape of a spiral is welded on the said skeleton master muscle (4) continuously; Said pile body profile is square, the stake heart is columnar through hole; Said pile body four limit corners are stress and eliminate circular arc, and it is characterized in that: the radius of four circular arcs of said pile body is all 5-9mm.
2. prestress concrete offcenter squared pile according to claim 1 is characterized in that: the profile of said metal end plate (3) is identical with the profile of said offcenter squared pile; Bevel for welding (6), central authorities that said metal end plate (3) four limits are provided with 45 degree inclination angles are circular holes identical with the median pore diameter of said offcenter squared pile.
3. prestress concrete offcenter squared pile according to claim 1; It is characterized in that: said skeleton master muscle (4) is a rod iron; Said skeleton master muscle (4) is parallel with the pile body outline line of said offcenter squared pile, and said skeleton master muscle (4) has heading (7) with said metal end plate (3) junction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102686539A CN102747727A (en) | 2012-07-30 | 2012-07-30 | Prestressed concrete centrifugal square pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102686539A CN102747727A (en) | 2012-07-30 | 2012-07-30 | Prestressed concrete centrifugal square pile |
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| CN102747727A true CN102747727A (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102686539A Pending CN102747727A (en) | 2012-07-30 | 2012-07-30 | Prestressed concrete centrifugal square pile |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572755A (en) * | 2013-11-01 | 2014-02-12 | 中淳高科桩业股份有限公司 | Prestressed concrete precast pile |
| CN104458377A (en) * | 2014-12-13 | 2015-03-25 | 广西科技大学 | Method for manufacturing specimens containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars |
| CN104610850A (en) * | 2014-12-05 | 2015-05-13 | 南通中技桩业有限公司 | Prestressed concrete hollow square pile and its corrosion and wear resistant material |
| CN113026724A (en) * | 2021-01-28 | 2021-06-25 | 张红兵 | Prestressed concrete hollow square pile |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2257737A (en) * | 1991-07-19 | 1993-01-20 | Roxbury Ltd | Hollow reinforced pile sections |
| CN101054800A (en) * | 2007-05-11 | 2007-10-17 | 上海中技桩业发展有限公司 | Prestress high intensity concrete square pile and its production method and moulding die |
| JP2010048039A (en) * | 2008-08-25 | 2010-03-04 | Japan Pile Corp | Prestressed reinforced concrete pile |
| CN202000345U (en) * | 2011-04-19 | 2011-10-05 | 上海中技桩业股份有限公司 | Prestressed concrete hollow square pile |
| CN202039343U (en) * | 2011-05-06 | 2011-11-16 | 上海中技桩业股份有限公司 | Hollow foundation concrete square pile |
| CN202745050U (en) * | 2012-07-30 | 2013-02-20 | 天津建城基业集团有限公司 | Pre-stressed concrete centrifuge square pile |
-
2012
- 2012-07-30 CN CN2012102686539A patent/CN102747727A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2257737A (en) * | 1991-07-19 | 1993-01-20 | Roxbury Ltd | Hollow reinforced pile sections |
| CN101054800A (en) * | 2007-05-11 | 2007-10-17 | 上海中技桩业发展有限公司 | Prestress high intensity concrete square pile and its production method and moulding die |
| JP2010048039A (en) * | 2008-08-25 | 2010-03-04 | Japan Pile Corp | Prestressed reinforced concrete pile |
| CN202000345U (en) * | 2011-04-19 | 2011-10-05 | 上海中技桩业股份有限公司 | Prestressed concrete hollow square pile |
| CN202039343U (en) * | 2011-05-06 | 2011-11-16 | 上海中技桩业股份有限公司 | Hollow foundation concrete square pile |
| CN202745050U (en) * | 2012-07-30 | 2013-02-20 | 天津建城基业集团有限公司 | Pre-stressed concrete centrifuge square pile |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572755A (en) * | 2013-11-01 | 2014-02-12 | 中淳高科桩业股份有限公司 | Prestressed concrete precast pile |
| CN103572755B (en) * | 2013-11-01 | 2016-06-15 | 中淳高科桩业股份有限公司 | Prestressed concrete prefabricated pile |
| CN104610850A (en) * | 2014-12-05 | 2015-05-13 | 南通中技桩业有限公司 | Prestressed concrete hollow square pile and its corrosion and wear resistant material |
| CN104610850B (en) * | 2014-12-05 | 2018-05-01 | 南通中技桩业有限公司 | A kind of pre-stressed concrete hollow square stake and its corrosion-proof wear-resistant material |
| CN104458377A (en) * | 2014-12-13 | 2015-03-25 | 广西科技大学 | Method for manufacturing specimens containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars |
| CN113026724A (en) * | 2021-01-28 | 2021-06-25 | 张红兵 | Prestressed concrete hollow square pile |
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Application publication date: 20121024 |