CN101914913A - Pretensioned prestressed concrete quadrilateral pile and production method thereof - Google Patents
Pretensioned prestressed concrete quadrilateral pile and production method thereof Download PDFInfo
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- CN101914913A CN101914913A CN 201010253293 CN201010253293A CN101914913A CN 101914913 A CN101914913 A CN 101914913A CN 201010253293 CN201010253293 CN 201010253293 CN 201010253293 A CN201010253293 A CN 201010253293A CN 101914913 A CN101914913 A CN 101914913A
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Abstract
The invention discloses a pretensioned prestressed concrete quadrilateral pile, which is characterized by comprising a plurality of main reinforcements, wherein the main reinforcements are welded with spiral reinforcements; the heads of the main reinforcements are greater than the diameters of the main reinforcements; both ends of the main reinforcements are connected with quadrilateral end plates respectively; concrete is poured outside a reinforcement cage frame consisting of the main reinforcements and the spiral reinforcements; the concrete is combined with the reinforcement cage frame into an integral quadrilateral pile body; and the center of the quadrilateral pile body is provided with a central round hole passing through the whole quadrilateral pile body. Aiming to overcome the deficiencies in the prior art, the invention provides the pretensioned prestressed concrete quadrilateral pile which has the advantages of high molding quality, high bearing capacity of a single pile, damage resistance during use of the reinforcement frameworks, high bending resistance bearing capacity, high shearing resistance, convenient stacking, and difficult damage during hoisting, transporting and transferring the pile. The invention also aims to provide a production method of the pretensioned prestressed concrete quadrilateral pile.
Description
Technical field
The present invention relates to a kind of Pretensioned prestressed concrete quadrilateral pile, the invention still further relates to a kind of production method of Pretensioned prestressed concrete quadrilateral pile.
Background technology
In the middle of the construction work at present there being much employed precast concrete pile foundation, mainly contains the solid side's stake of concrete, concrete hollow square pile, prestressed concrete pipe pile, precast concrete castinplace pile etc.Its main performance performance is as follows:
The solid side's stake of precast concrete friction area is big, but it is bigger to exist deadweight, is prone to crack, fracture easily in lifting, transportation, the construction transhipment, it is too much to consume materials such as concrete, steel when manufacturing, be difficult for welding, because concrete strength is lower, defectives such as easy quick-fried stake.
Castinplace pile is subjected to weather effect bigger, rainy day can't construct, the construction period can't guarantee, because castinplace pile, these two kinds of stakes of solid side stake are directly concrete to be filled in the prefabricated reinforcing bar, through natural curing moulding or vibration moulding, its concrete strength generally is lower than C40.The pile concrete resistance to compression and the impervious ability of this explained hereafter are relatively poor, have problems such as durability is relatively poor.Pile quality can not get guaranteeing, and the waste national resources.
There are two kinds of stakes to plant in the market, are respectively prestressed concrete pipe pile and pre-stressed concrete hollow square stake through centrifugal forming.The prestressed concrete pipe pile manufacturing technology of centrifugal forming is very ripe, by the rotation at a high speed on centrifuge of centrifugal pipe die, concrete material is moved along the outer edge moulding of pipe die inner chamber and as high speed centrifugation, is centrifuged into concrete tubular pile at last.Reliable through pile quality behind the centrifugal forming, has the high advantage of concrete strength of pile, but pile tube smooth outer surface, size is little, little with the frictional force of the soil body when making friction pile using under equivalent diameter, the single pile bearing capacity of foundation soil that provides is lower, and owing to the bending resistance of thin-wall pipe pile is not high, in many engineerings, be measure all, thereby improved construction costs to enlarge the pile tube external diameter.
Main in the market side's stake, the patent No. is: ZL200710068545.6, name is called: " prestress high intensity concrete square pile and manufacture method thereof and moulding form ", the patent No. is: ZL99116046.0, name is called " a kind of prestress square pile and manufacture method thereof ", the patent No. is: ZL200820182436.7, it is all to be that the centrifugal pile tube mould of imitation rotates the making offcenter squared pile at a high speed on centrifuge that name is called patents such as " stakes of high-bearing capacity pre-stressed concrete hollow square ", make the making offcenter squared pile become reality, make side's stake of moulding have high strength, high-bearing capacity, be difficult for advantages such as sudden and violent stake during construction.Though than pile tube height, still there are some problems that need solve in it through the frictional force on the prestressed concrete square pile of centrifugal forming and ground and bearing capacity, as:
1, its pile body commissure on the rounding or right angle on four limits, is easy to generate problems such as spillage and the side's of influence forming pile quality just;
2, the main muscle of reinforcement cage skeleton and stirrup roll welding are not firm, loose easily.
3, main muscle does not all wait at 1.0～20mm at when welding burn, reduced greatly reinforcing bar usable floor area, thereby have a strong impact on the functional performance of reinforcing bar.
4, the pile body commissure is knocked damage easily, damages pile body.
Summary of the invention
The objective of the invention is in order to overcome weak point of the prior art, a kind of Forming Quality height, bearing capacity of single pile height are provided, injury-free in use, the horizontal anti-bending bearing capacity of cage of reinforcement is good, shear behavior is high, stacking is convenient, hang stake, transportation, when transhipment survivable Pretensioned prestressed concrete quadrilateral pile;
Another object of the present invention provides a kind of production method of Pretensioned prestressed concrete quadrilateral pile.
In order to achieve the above object, following scheme is adopted in invention:
A kind of Pretensioned prestressed concrete quadrilateral pile, it is characterized in that: comprise many main reinforcements, on described main reinforcement, be welded with spiral reinforcement, described main reinforcement head is greater than the diameter of main reinforcement, on described main reinforcement two ends, be connected with the quadrangle end plate respectively, outside the reinforcing bar cage of main reinforcement and spiral reinforcement composition, be cast with concrete, the quadrangle pile body that described concrete and reinforcing bar cage are combined into one is provided with a center hole that runs through whole quadrangle pile body at described quadrangle pile body center.
Aforesaid a kind of Pretensioned prestressed concrete quadrilateral pile, it is characterized in that on described quadrangle end plate, being provided with a plurality of combination bore described, described combination bore comprises a screw stretch-draw hole and a heavy muscle hole, be provided with the muscle groove between described screw stretch-draw hole and heavy muscle hole, its head of main reinforcement inserts screw stretch-draw orifice ring and is connected to after passing the muscle groove on the heavy muscle hole.
Aforesaid a kind of Pretensioned prestressed concrete quadrilateral pile, it is characterized in that between its adjacent both sides of described quadrangle pile body the arc transition eliminated for stress, the commissure of described quadrangle pile body is in the described circular arc outside, on described quadrangle end plate, be provided with and the corresponding circular arc of described quadrangle pile body, its arc angle of described circular arc θ is that 20～120 °, arc radius R are 2～60mm, and the length of described two other circular arc of quadrangle pile body is the same with commissural arc length.
Aforesaid a kind of Pretensioned prestressed concrete quadrilateral pile is characterized in that being the right angle between its adjacent both sides of described quadrangle pile body, is provided with the right angle corresponding with described quadrilateral pile on described quadrangle end plate.
Aforesaid a kind of Pretensioned prestressed concrete quadrilateral pile is characterized in that being provided with on the groove face of described quadrangle end plate and is the corrugated decorative pattern, and the line of described decorative pattern is apart from being 1.0～10mm, and line is 0.1～6.0mm deeply.
Aforesaid a kind of Pretensioned prestressed concrete quadrilateral pile is characterized in that being provided with radially strip groove from inside to outside on the groove face of described quadrangle end plate, described strip groove length is 2mm～10mm.
A kind of production method of Pretensioned prestressed concrete quadrilateral pile is characterized in that it comprises step:
A) earlier that corresponding quadrilateral pile mold cleaning is clean, and coat interleaving agent;
B) reinforcement cage skeleton is hung to the lower mold body of quadrangle mould, the quadrangle end plate is installed on the main reinforcement two ends of reinforcement cage skeleton;
C) lower mold body that will place reinforcing cage hangs below concrete mixer, and the concrete material that premixing is good is put into mould; The upper die body that closes, and lock lock screw on the upper and lower mould;
D), the reinforcing bar of reinforcement cage skeleton is carried out prestressed stretch-draw with the mould of first-class screw horizontal positioned in the lump;
E) mould that stretch-draw is good hangs and carry out centrifugal forming on centrifuge, after the moulding the surplus pulp-water of inwall is toppled over totally;
F) above-mentioned mould is hung in carry out stream curing in the stream curing pond, vapor (steam) temperature is more than 50 ℃, and curing time is more than 4 hours, and stream curing finishes after-bay, takes upper and lower mould apart, forms finished product;
G) quadrilateral pile that will the form finished product autoclave of packing into carries out the indirect steam maintenance, and vapor (steam) temperature is 160～230 ℃, and steam pressure is more than 0.60MPa, and the time is 6～10 hours, promptly gets final products.
In sum, invention with respect to its beneficial effect of prior art is:
1, because this technology is to adopt centrifugal forming, and its pile concrete density is good, strength grade is higher, can reach C60, more than the C80, thereby improves its load-carrying properties greatly;
2, because the outside is a quadrangle, its effective cross-sectional area is bigger, the bearing capacity of single pile height; Its effective length and cushion cap can correspondingly reduce when design, thereby have improved its economic performance, have saved fund greatly;
3, manufacture craft advanced person makes the main muscle of reinforcing cage and stirrup roll welding firm, avoids the main muscle in the reinforcement cage skeleton to be burnt again, has guaranteed the use of reinforcing bar.
4, avoid its pile body commissure just on the rounding or right angle on four limits, guaranteed square forming pile quality, pile body integrity is good, and the pile body mechanical property is good, and stake can be adopted with being connected of stake and weld or mechanical connection.
5, since the groove of end plate be provided with and be undulatory decorative pattern or, strengthened the welding performance of end plate at the strip groove that is provided with in the radial direction from inside to outside, thereby improved stake with bonding strength.
Description of drawings
Fig. 1 is the schematic perspective view of invention;
Fig. 2 is a phantom drawing of the present invention;
Fig. 3 is the schematic diagram that main reinforcement cooperates with combination bore;
Fig. 4 is the schematic diagram of first kind of embodiment of quadrangle end plate;
Fig. 5 is the schematic diagram of line shape decorative pattern;
Fig. 6 is the schematic diagram of second kind of embodiment of quadrangle end plate;
Fig. 7 is the schematic diagram of strip groove;
Fig. 8 is the commissural schematic diagram of quadrangle pile body;
Fig. 9 is the schematic diagram of the another kind of embodiment of quadrilateral pile of the present invention.
The specific embodiment
Below in conjunction with the description of drawings and the specific embodiment invention is further described:
A kind of Pretensioned prestressed concrete quadrilateral pile shown in Fig. 1 and 9, comprise many main reinforcements 1, on described main reinforcement 1, be welded with spiral reinforcement 2, described main reinforcement 1 its head 11 is greater than the diameter of main reinforcement 1, on described main reinforcement 1 two ends, be connected with quadrangle end plate 3 respectively, outside the reinforcing bar cage that main reinforcement 1 and spiral reinforcement 2 are formed, be cast with concrete, the quadrangle pile body 4 that described concrete and reinforcing bar cage are combined into one is provided with a center hole 5 that runs through whole quadrangle pile body 4 at described quadrangle pile body 4 centers.
On described quadrangle end plate 3, be provided with a plurality of combination bore 6 described among the present invention, described combination bore 6 comprises a screw stretch-draw hole 61 and a heavy muscle hole 62, be provided with muscle groove 63 between described screw stretch-draw hole 61 and heavy muscle hole 62, main reinforcement 1 its head 11 inserts and was connected on the heavy muscle hole 62 after screw stretch-draw hole 61 hoops passed muscle groove 63.
As illustrated in fig. 1 and 2, circular arc 7 transition of eliminating for stress between quadrangle pile body 4 its adjacent both sides described in the present invention, the commissure 12 of described quadrangle pile body 4 is in described circular arc 7 outsides, on described quadrangle end plate 3, be provided with the circular arc corresponding with described quadrangle pile body 4, described circular arc 7 its arc angle θ are that 20～120 °, arc radius R are 2～60mm, and the length of described quadrangle pile body 4 two other circular arcs is the same with commissural arc length.
As shown in Figure 9, quadrangle pile body of the present invention is the right angle between 4 its adjacent both sides, is provided with the right angle corresponding with described quadrilateral pile on described quadrangle end plate 2.
Shown in Figure 4 and 5, on the groove face 301 of described quadrangle end plate 3, be provided with among the present invention and be corrugated decorative pattern 31, the line of described decorative pattern 31 is apart from being 1.0～10mm, line is 0.1～6.0mm deeply.
The another kind of embodiment of quadrangle end plate 3 of the present invention is provided with radially strip groove 32 from inside to outside on the groove face 301 of described quadrangle end plate 3 shown in Fig. 6 and 7, described strip groove 32 length are 2mm～10mm.
A kind of production method of Pretensioned prestressed concrete quadrilateral pile, it comprises step:
H) earlier that corresponding quadrilateral pile mold cleaning is clean, and coat interleaving agent;
I) reinforcement cage skeleton is hung to the lower mold body of quadrangle mould, with the quadrangle end plate be installed on the main reinforcement two ends of reinforcement cage skeleton; Elder generation penetrates the main reinforcement head of reinforcement cage skeleton in the screw stretch-draw hole during installation, rotation quadrangle end plate, again main reinforcement is packed in the heavy muscle hole, at last mounted reinforcement cage skeleton one end is connected with fixed head, the other end fixes with the stretch-draw anchor slab, with stretching screw two ends is coupled together respectively at last;
J) lower mold body that will place reinforcing cage hangs below concrete mixer, and the concrete material that premixing is good is put into mould; The upper die body that closes, and lock lock screw on the upper and lower mould;
K), the reinforcing bar of reinforcement cage skeleton is carried out prestressed stretch-draw with the mould of first-class screw horizontal positioned in the lump;
L) mould that stretch-draw is good hangs and carry out centrifugal forming on centrifuge, after the moulding the surplus pulp-water of inwall is toppled over totally;
M) above-mentioned mould is hung in carry out stream curing in the stream curing pond, vapor (steam) temperature is more than 50 ℃, and curing time is more than 4 hours, and stream curing finishes after-bay, takes upper and lower mould apart, forms finished product; The concrete strength of this moment can reach about 50MPa;
N) quadrilateral pile that will the form finished product autoclave of packing into carries out the indirect steam maintenance, and vapor (steam) temperature is 160～230 ℃, and steam pressure is more than 0.60MPa, and the time is 6～10 hours, promptly gets final products.The concrete strength of this moment can reach more than the 80MPa.
The Pretensioned prestressed concrete quadrilateral pile that the present invention produces is specially hollow quadrilateral pile, and there is the quadrangle end plate at two, and the center is an open circles in the quadrangle end plate, and end plate is provided with heavy muscle hole and stretch-draw hole, and thickness of slab is 18mm.Two end plates links with reinforcing cage, and reinforcing cage is made up of after roll welding the reinforcing bar of equal length.The used main muscle of reinforcing cage is a prestressed steel bar.Be used to make the prestressed centrifugally concrete quadrilateral pile.The two ends plate has the parcel of the common iron plate of 2mm to play the shirt rim effect with the reinforcing cage direction, the reinforcing cage that connects end plate is put into the quadrangle mould, penetration concrete in mould, carry out stretch-draw after closing upper and lower mould tightly, put into centrifugal forming on the centrifuge, whole centrifuging process is divided into low speed, low-medium speed, middling speed, four processes of high speed, behind centrifugal the finishing, it is clean that moisture content after centrifugal squeezing is tilted, gang mould is put into stream curing pond maintenance four hours together, vapor (steam) temperature is 85 ℃, forms an outer quadrangle, and inner chamber is the circular centrifugal stake of quadrangle.This moment, concrete strength was 65MPa, and concrete ductility is best this moment, as must further improving concrete strength, can continue to carry out maintenance with a kind of container of high temperature high voltage resistant, was commonly called as still kettle.Pressure is adjusted into 0.95Map, and the time is 8 hours, and quadrilateral pile concrete strength at this moment can reach about 95MPa, promptly gets this product.Can dispatch from the factory after cooling and transport the building site injection to.
Claims (7)
1. Pretensioned prestressed concrete quadrilateral pile, it is characterized in that: comprise many main reinforcements (1), on described main reinforcement (1), be welded with spiral reinforcement (2), its head of described main reinforcement (1) (11) is greater than the diameter of main reinforcement (1), on described main reinforcement (1) two ends, be connected with quadrangle end plate (3) respectively, outside the reinforcing bar cage that main reinforcement (1) and spiral reinforcement (2) are formed, be cast with concrete, the quadrangle pile body (4) that described concrete and reinforcing bar cage are combined into one is provided with a center hole (5) that runs through whole quadrangle pile body (4) at described quadrangle pile body (4) center.
2. a kind of Pretensioned prestressed concrete quadrilateral pile according to claim 1, it is characterized in that in the described a plurality of combination bore (6) that on described quadrangle end plate (3), are provided with, described combination bore (6) comprises a screw stretch-draw hole (61) and a heavy muscle hole (62), be provided with muscle groove (63) between described screw stretch-draw hole (61) and heavy muscle hole (62), its head of main reinforcement (1) (11) inserts and was connected on the heavy muscle hole (62) after screw stretch-draw hole (61) hoop passed muscle groove (63).
3. a kind of Pretensioned prestressed concrete quadrilateral pile according to claim 1, it is characterized in that between its adjacent both sides of described quadrangle pile body (4) circular arc (7) transition eliminated for stress, the commissure (12) of described quadrangle pile body (4) is in described circular arc (7) outside, be provided with on described quadrangle end plate (3) and the corresponding circular arc of described quadrangle pile body (4), its arc angle of described circular arc (7) θ is that 20～120 °, arc radius R are 2～60mm.
4. a kind of Pretensioned prestressed concrete quadrilateral pile according to claim 1 is characterized in that being the right angle between its adjacent both sides of described quadrangle pile body (4), is provided with the right angle corresponding with described quadrilateral pile on described quadrangle end plate (2).
5. a kind of Pretensioned prestressed concrete quadrilateral pile according to claim 1, it is characterized in that on the groove face (301) of described quadrangle end plate (3), being provided with and be corrugated decorative pattern (31), the line of described decorative pattern (31) is apart from being 1.0～10mm, and line is 0.1～6.0mm deeply.
6. a kind of Pretensioned prestressed concrete quadrilateral pile according to claim 1, it is characterized in that being provided with on the groove face (301) of described quadrangle end plate (3) radially strip groove (32) from inside to outside, described strip groove (32) length is 2mm～10mm.
7. the production method of any one Pretensioned prestressed concrete quadrilateral pile of claim 1 to 6 is characterized in that it comprises step:
A) earlier that corresponding quadrilateral pile mold cleaning is clean, and coat interleaving agent;
B) reinforcement cage skeleton is hung to the lower mold body of quadrangle mould, the quadrangle end plate is installed on the main reinforcement two ends of reinforcement cage skeleton;
C) lower mold body that will place reinforcing cage hangs below concrete mixer, and the concrete material that premixing is good is put into mould; The upper die body that closes, and lock lock screw on the upper and lower mould;
D), the reinforcing bar of reinforcement cage skeleton is carried out prestressed stretch-draw with the mould of first-class screw horizontal positioned in the lump;
E) mould that stretch-draw is good hangs and carry out centrifugal forming on centrifuge, after the moulding the surplus pulp-water of inwall is toppled over totally;
F) above-mentioned mould is hung in carry out stream curing in the stream curing pond, vapor (steam) temperature is more than 50 ℃, and curing time is more than 4 hours, and stream curing finishes after-bay, takes upper and lower mould apart, forms finished product;
G) quadrilateral pile that will the form finished product autoclave of packing into carries out the indirect steam maintenance, and vapor (steam) temperature is 160～230 ℃, and steam pressure is more than 0.60MPa, and the time is 6～10 hours, promptly gets final products.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166788A (en) * | 2011-01-26 | 2011-08-31 | 江苏建华管桩有限公司 | Production method of pretensioning prestressed concrete dynamic load piles |
| CN102491702A (en) * | 2011-11-07 | 2012-06-13 | 江苏建华管桩有限公司 | Concrete pile and preparation method thereof |
| CN102505680A (en) * | 2011-10-24 | 2012-06-20 | 天津开发区福林发展有限公司 | Prestressed reinforced concrete special-shaped precast pile |
| CN103114573A (en) * | 2013-02-07 | 2013-05-22 | 江苏固丰管桩集团有限公司 | Prestressed reinforced concrete solid square pile and manufacturing technique thereof |
| CN103114581A (en) * | 2013-01-28 | 2013-05-22 | 杨发 | Manufacture method of prestressed reinforced concrete piles |
| CN103950101A (en) * | 2014-04-21 | 2014-07-30 | 南通华柱水泥制品有限公司 | Manufacturing method for high-strength concrete pile |
| CN112248220A (en) * | 2020-10-16 | 2021-01-22 | 盐城市双强管桩有限公司 | Method for manufacturing steel mould of pre-tensioned prestressed concrete prefabricated screw pile |
| CN113152449A (en) * | 2021-04-16 | 2021-07-23 | 建华建材（中国）有限公司 | End plate sheet, precast pile, tensioning structure and method, pile splicing structure and method |
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| CN201512785U (en) * | 2009-09-22 | 2010-06-23 | 许发寿 | Hollow square-pile welding end plate |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166788A (en) * | 2011-01-26 | 2011-08-31 | 江苏建华管桩有限公司 | Production method of pretensioning prestressed concrete dynamic load piles |
| CN102505680A (en) * | 2011-10-24 | 2012-06-20 | 天津开发区福林发展有限公司 | Prestressed reinforced concrete special-shaped precast pile |
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| CN103114573A (en) * | 2013-02-07 | 2013-05-22 | 江苏固丰管桩集团有限公司 | Prestressed reinforced concrete solid square pile and manufacturing technique thereof |
| CN103950101A (en) * | 2014-04-21 | 2014-07-30 | 南通华柱水泥制品有限公司 | Manufacturing method for high-strength concrete pile |
| CN112248220A (en) * | 2020-10-16 | 2021-01-22 | 盐城市双强管桩有限公司 | Method for manufacturing steel mould of pre-tensioned prestressed concrete prefabricated screw pile |
| CN112248220B (en) * | 2020-10-16 | 2022-01-18 | 盐城市双强管桩有限公司 | Method for manufacturing steel mould of pre-tensioned prestressed concrete prefabricated screw pile |
| CN113152449A (en) * | 2021-04-16 | 2021-07-23 | 建华建材（中国）有限公司 | End plate sheet, precast pile, tensioning structure and method, pile splicing structure and method |
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Application publication date: 20101215 |