CN101936002A - Prestressed concrete hollow square pile and production method thereof - Google Patents
Prestressed concrete hollow square pile and production method thereof Download PDFInfo
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- CN101936002A CN101936002A CN 201010253308 CN201010253308A CN101936002A CN 101936002 A CN101936002 A CN 101936002A CN 201010253308 CN201010253308 CN 201010253308 CN 201010253308 A CN201010253308 A CN 201010253308A CN 101936002 A CN101936002 A CN 101936002A
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Abstract
The invention discloses a prestressed concrete hollow square pile comprising a plurality of independent main steel reinforcements. Both ends of each main steel reinforcement are respectively fixedly connected with square end plates; the main steel reinforcements are externally sleeved with steel reinforcement cage racks; each steel reinforcement cage rack comprises a spiral steel reinforcement, and the spiral steel reinforcement is welded with a plurality of auxiliary steel reinforcements; concrete is poured outside the main steel reinforcements and the steel reinforcement cage racks and is combined with the main steel reinforcements and the steel reinforcement cage racks into an integral square pile; and the center of the integral square pile is provided with a central circular hole penetrating through an integral square pile body. The invention aims at providing the prestressed concrete hollow square pile which has the advantages of good molding quality, high single-pile bearing capacity, undamaged steel reinforcement framework before the steel reinforcement framework is used, convenient production, good horizontal anti-bending bearing capacity, high shearing resistant property, convenient stacking and difficult knock damage during pile hoisting, transportation and transferring. The invention also aims at providing a production method of the prestressed concrete hollow square pile.
Description
Technical field
Invention relates to a kind of pre-stressed concrete hollow square stake, the invention still further relates to a kind of production method of pre-stressed concrete hollow square stake.
Background technology
Employed precast concrete hollow square pile mainly contains two kinds in the middle of the construction work at present: the solid side's stake of concrete, concrete hollow square pile.Its main performance embodies 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, and it is too much to consume materials such as concrete, steel when manufacturing.Its production technology is for directly to be filled into concrete in the prefabricated reinforcing bar, and through natural curing moulding or vibration moulding, internal void is more, and its compressive strength is below the C40.The side stake 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.
Centrifugal forming side's stake in the market is the pre-stressed concrete hollow square stake, the patent No. is: ZL200710068545.6, name is called: " prestress high intensity concrete hollow 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 pre-stressed concrete hollow square stake of centrifugal forming and ground and bearing capacity, as: the pile body commissure on the diagonal angle on four limits, is easy to generate problems such as spillage just; The main muscle and the stirrup roll welding of reinforcing cage are not firm; Main muscle is burnt when welding easily; The stress loss of cage of reinforcement is bigger, with reinforcing cage end face different in size, the whole out-of-flatness of bundle reinforcing bar, when reinforcing cage is installed than heaviness etc.
Summary of the invention
The objective of the invention is in order to overcome weak point of the prior art, provide that a kind of Forming Quality is good, bearing capacity of single pile is high, injury-free before use, convenient for production, the horizontal anti-bending bearing capacity of cage of reinforcement is good, shear behavior is high, stacking is convenient, hang stake, be difficult for knocking when transportation, transhipment the pre-stressed concrete hollow square stake of damage;
Another object of the present invention is for a kind of production method of pre-stressed concrete hollow square stake is provided.
In order to achieve the above object, following scheme is adopted in invention:
A kind of pre-stressed concrete hollow square stake, it is characterized in that: comprise many independently main reinforcements, on described main reinforcement two ends, be fixedly connected with square endplate respectively, outside described main reinforcement, be arranged with the reinforcing cage frame, described reinforcing bar cage comprises spiral reinforcement, on described spiral reinforcement, be welded with many auxiliary reinforcements, outside described main reinforcement and reinforcing bar cage, be cast with concrete, the barrette that described concrete and main reinforcement and reinforcing bar cage are combined into one is provided with a center hole that runs through whole side's pile body at described barrette center.
Aforesaid a kind of pre-stressed concrete hollow square stake is characterized in that being provided with on the groove face of described square endplate and is the corrugated decorative pattern, and the line of described decorative pattern is apart from being 0.1～10mm, and line is 0.1～6.0mm deeply.
Aforesaid a kind of pre-stressed concrete hollow square stake is characterized in that being provided with radially strip groove from inside to outside on the groove face of described square endplate, groove length is 2mm～20mm.
Aforesaid a kind of pre-stressed concrete hollow square stake is characterized in that being the right angle between its adjacent both sides of barrette, is provided with the right angle corresponding with described barrette on described square endplate.
Aforesaid a kind of pre-stressed concrete hollow square stake, it is characterized in that between its adjacent both sides of described barrette the arc transition eliminated for stress, the commissure of described barrette is in the described circular arc outside, on described square endplate, be provided with the circular arc corresponding with described barrette, 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 barrette is the same with commissural arc length.
Aforesaid a kind of pre-stressed concrete hollow square stake, it is characterized in that on described square endplate, being provided with a plurality of combination bore, described combination bore comprises a screw stretch-draw hole and a heavy muscle hole, between described screw stretch-draw hole and heavy muscle hole, be provided with the muscle groove, its head of described main reinforcement is greater than the diameter of main reinforcement, and 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.
A kind of production method of pretensioning prestressed concrete hollow square pile is characterized in that may further comprise the steps:
A, elder generation clean out corresponding side's pile die, coat interleaving agent;
B, reinforcement cage skeleton is hung in the lower mold body of square pile die, in described reinforcement cage skeleton, place many main reinforcements, at the fixedly connected square endplate in described main reinforcement two ends, 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;
C, above-mentioned lower mold body is hung below concrete mixer, the concrete material that premixing is good is put into mould, and the upper die body that closes is locked the lock screw on the upper and lower die body;
D, the square pile die of first-class screw level is in the lump put well, reinforcement cage skeleton is answered limit stretch-draw in advance;
E, the mould that stretch-draw is good are put to centrifuge and are carried out centrifugal forming, after the moulding the surplus pulp-water of inwall are toppled over totally;
F, above-mentioned mould 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, and form removal forms finished product just;
G, the above-mentioned first finished product steaming and cultivating equipment of packing into is carried out the indirect steam maintenance, vapor (steam) temperature is 150～230 ℃, and steam pressure is more than 0.6MPa, and the time is 6～10 hours, promptly forms the pretensioning prestressed concrete hollow square pile.
In sum, invention with respect to its beneficial effect of prior art is:
1, manufacture craft advanced person of the present invention, after the reinforcement cage skeleton structure that adopts, make the not direct and spiral reinforcement welding of main reinforcement, the real main reinforcement of avoiding is burnt when welding, thereby make main reinforcement even when stressed, can not cause the main reinforcement fracture, guarantee the use of main reinforcement because of the damage of welding.When stretch-draw, there is not simultaneously the loose existing picture of reinforcing cage, ensured the integrality of reinforcing cage, guaranteed that the transmission of stress is even, make the pile foundation material when construction, be not easy to destroy, further obtained guarantee its application life.
2, because real main reinforcement just penetrates when mounted, reduce weight when mounted, reduced when welding and worn the muscle time, thereby reduced working strength of workers, improved production efficiency.
3, because this technology is to adopt centrifugal forming, and its pile concrete density is good, strength grade is higher, more than C60～C80, thereby improves its durability greatly; 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;
4, avoid its pile body commissure just on the arc chord angle 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, main reinforcement penetrates after the reinforcing cage moulding, quality problems such as end slope, the main reinforcement that equipment or human factor cause when having stopped welding is different in size, reinforcing cage distortion.Guarantee the integral end surface evenness of pile foundation material, solved the eccentric force problem of pile foundation material.
6, 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 the schematic diagram of the three-dimensional another kind of embodiment of invention;
Fig. 3 is a phantom drawing of the present invention;
Fig. 4 is the schematic diagram that main reinforcement cooperates with combination bore;
Fig. 5 is the schematic diagram of first kind of embodiment of quadrangle end plate;
Fig. 6 is the schematic diagram of line shape decorative pattern;
Fig. 7 is the schematic diagram of second kind of embodiment of quadrangle end plate;
Fig. 8 is the schematic diagram of strip groove;
Fig. 9 is the schematic diagram of reinforcing bar cage;
Figure 10 is the commissural schematic diagram of barrette.
The specific embodiment
Below in conjunction with the description of drawings and the specific embodiment invention is further described:
A kind of pre-stressed concrete hollow square stake as shown in figs. 1 and 10, comprise many independently main reinforcements 1, on described main reinforcement 1 two ends, be fixedly connected with square endplate 2 respectively, outside described main reinforcement 1, be arranged with reinforcing cage frame 3, described reinforcing bar cage 3 comprises spiral reinforcement 31, on described spiral reinforcement 31, be welded with many auxiliary reinforcements 32, described auxiliary reinforcement 32 its length are littler than the length of main reinforcement 1, outside described main reinforcement 1 and reinforcing bar cage 3, be cast with concrete, the barrette 6 that described concrete and main reinforcement 1 and reinforcing bar cage 3 are combined into one is provided with a center hole 4 that runs through whole side's pile body 6 at described barrette 6 centers.
As illustrated in Figures 5 and 6, be provided with on the groove face 201 of described square endplate 2 among the present invention and be corrugated decorative pattern 21, the line of described decorative pattern 21 is apart from being 0.1～10mm, and line is 0.1～6.0mm deeply.
The another kind of embodiment of square endplate 2 is shown in Fig. 7 and 8 among the present invention, is provided with radially strip groove 22 from inside to outside on the groove face 201 of described square endplate 2, and groove 22 length are 2mm～20mm.
As shown in Figure 2, be the right angle between its adjacent both sides of barrette among the present invention, on described square endplate 2, be provided with the right angle corresponding with described barrette.
The another kind of embodiment of barrette as shown in Figure 1 among the present invention, circular arc 7 transition of eliminating for stress between described barrette 6 its adjacent both sides, the commissure 12 of described barrette 6 is in described circular arc 7 outsides, on described square endplate 2, be provided with the circular arc corresponding with described barrette, its arc angle of described circular arc θ is that 20～120 °, arc radius R are 2～60mm, and the length of described barrette 6 two other circular arcs is the same with commissural arc length.
On described square endplate 2, be provided with a plurality of combination bore 5 among the present invention, described combination bore 5 comprises a screw stretch-draw hole 51 and a heavy muscle hole 52, between described screw stretch-draw hole 51 and heavy muscle hole 52, be provided with muscle groove 53, described main reinforcement 1 its head 11 is greater than the diameter of main reinforcement 1, and main reinforcement 1 its head 11 inserts and was connected on the heavy muscle hole 52 after screw stretch-draw hole 51 hoops passed muscle groove 53.
A kind of production method of pretensioning prestressed concrete hollow square pile may further comprise the steps:
H, elder generation clean out corresponding side's pile die, coat interleaving agent;
I, reinforcement cage skeleton is hung in the lower mold body of square pile die, in described reinforcement cage skeleton, place many main reinforcements, at the fixedly connected square endplate in described main reinforcement two ends, elder generation penetrates the main reinforcement head of reinforcement cage skeleton in the screw stretch-draw hole during installation, rotation quadrangle end plate is packed main reinforcement in the heavy muscle hole again, and 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, above-mentioned lower mold body is hung below concrete mixer, the concrete material that premixing is good is put into mould, and the upper die body that closes is locked the lock screw on the upper and lower die body;
K, the square pile die of first-class screw level is in the lump put well, reinforcement cage skeleton is answered limit stretch-draw in advance;
L, the mould that stretch-draw is good are put to centrifuge and are carried out centrifugal forming, after the moulding the surplus pulp-water of inwall are toppled over totally;
M, above-mentioned mould 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, and form removal forms finished product just; The concrete strength of this moment can reach about 50MPa;
N, the above-mentioned first finished product steaming and cultivating equipment of packing into is carried out the indirect steam maintenance, vapor (steam) temperature is 150～230 ℃, and steam pressure is more than 0.6MPa, and the time is 6～10 hours, promptly forms the pretensioning prestressed concrete hollow square pile.The concrete strength of this moment can reach more than the 80MPa.
The pretensioning prestressed concrete hollow square pile that the present invention produces is specially hollow square 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 main reinforcement, and reinforcing cage is made up of the reinforcing bar and the reinforcement cage skeleton of equal length.Main muscle in the reinforcement cage skeleton is a prestressed steel bar, is used to make the prestressed centrifugally concrete hollow square 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 side's stake 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. pre-stressed concrete hollow square stake, it is characterized in that: comprise many independently main reinforcements (1), on described main reinforcement (1) two ends, be fixedly connected with square endplate (2) respectively, outside described main reinforcement (1), be arranged with reinforcing cage frame (3), described reinforcing bar cage (3) comprises spiral reinforcement (31), on described spiral reinforcement (31), be welded with many auxiliary reinforcements (32), outside described main reinforcement (1) and reinforcing bar cage (3), be cast with concrete, the barrette (6) that described concrete and main reinforcement (1) and reinforcing bar cage (3) are combined into one is provided with a center hole (4) that runs through whole side's pile body (6) at described barrette (6) center.
2. a kind of pre-stressed concrete hollow square stake according to claim 1, it is characterized in that on the groove face (201) of described square endplate (2), being provided with and be corrugated decorative pattern (21), the line of described decorative pattern (21) is apart from being 0.1～10mm, and line is 0.1～6.0mm deeply.
3. a kind of pre-stressed concrete hollow square stake according to claim 1 is characterized in that being provided with radially strip groove (22) from inside to outside on the groove face (201) of described square endplate (2), groove (22) length is 2mm～20mm.
4. a kind of pre-stressed concrete hollow square stake according to claim 1 is characterized in that being the right angle between its adjacent both sides of barrette, is provided with the right angle corresponding with described barrette on described square endplate (2).
5. a kind of pre-stressed concrete hollow square stake according to claim 1, it is characterized in that between its adjacent both sides of described barrette (6) circular arc (7) transition eliminated for stress, the commissure (12) of described barrette (6) is in described circular arc (7) outside, on described square endplate (2), be provided with the circular arc corresponding with described barrette, its arc angle of described circular arc θ is that 20～120 °, arc radius R are 2～60mm, and the length of two other circular arc of described barrette (6) is the same with commissural arc length.
6. a kind of pre-stressed concrete hollow square stake according to claim 1, it is characterized in that on described square endplate (2), being provided with a plurality of combination bore (5), described combination bore (5) comprises a screw stretch-draw hole (51) and a heavy muscle hole (52), between described screw stretch-draw hole (51) and heavy muscle hole (52), be provided with muscle groove (53), its head of described main reinforcement (1) (11) is greater than the diameter of main reinforcement (1), and its head of main reinforcement (1) (11) inserts and was connected on the heavy muscle hole (52) after screw stretch-draw hole (51) hoop passed muscle groove (53).
7. the production method of any one pretensioning prestressed concrete hollow square pile of claim 1 to 6 is characterized in that may further comprise the steps:
A, elder generation clean out corresponding side's pile die, coat interleaving agent;
B, reinforcement cage skeleton is hung in the lower mold body of square pile die, in described reinforcement cage skeleton, place many main reinforcements, at the fixedly connected square endplate in described main reinforcement two ends, 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;
C, above-mentioned lower mold body is hung below concrete mixer, the concrete material that premixing is good is put into mould, and the upper die body that closes is locked the lock screw on the upper and lower die body;
D, the square pile die of first-class screw level is in the lump put well, reinforcement cage skeleton is answered limit stretch-draw in advance;
E, the mould that stretch-draw is good are put to centrifuge and are carried out centrifugal forming, after the moulding the surplus pulp-water of inwall are toppled over totally;
F, above-mentioned mould 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, and form removal forms finished product just;
G, the above-mentioned first finished product steaming and cultivating equipment of packing into is carried out the indirect steam maintenance, vapor (steam) temperature is 150～230 ℃, and steam pressure is more than 0.6MPa, and the time is 6～10 hours, promptly forms the pretensioning prestressed concrete hollow square pile.
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| CN2010102533089A CN101936002B (en) | 2010-08-16 | 2010-08-16 | Prestressed concrete hollow square pile and production method thereof |
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| CN2010102533089A CN101936002B (en) | 2010-08-16 | 2010-08-16 | Prestressed concrete hollow square pile and production method thereof |
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| CN102211353A (en) * | 2011-05-26 | 2011-10-12 | 宿迁市固丰管桩有限公司 | Process for manufacturing centrifugal concrete pile |
| CN102383420A (en) * | 2011-08-17 | 2012-03-21 | 江苏建华管桩有限公司 | High-strength concrete prefabricated pile doped with fiber-reinforced plastic bar |
| CN102518129A (en) * | 2011-12-29 | 2012-06-27 | 天津建城基业集团有限公司 | Post pressure-grouting pre-stressed hollow square pile and manufacturing method thereof |
| CN102704471A (en) * | 2012-05-22 | 2012-10-03 | 张俊峰 | Prestress solid concrete preformed pile |
| CN102979086A (en) * | 2012-12-17 | 2013-03-20 | 青岛兴河建材有限公司 | Prestressed concrete square pile and manufacturing method thereof |
| CN102995628A (en) * | 2012-12-17 | 2013-03-27 | 青岛兴河建材有限公司 | Precast reinforced concrete square pile and manufacturing method thereof |
| CN103225299A (en) * | 2013-03-29 | 2013-07-31 | 南通中技桩业有限公司 | Built-in anticorrosion structure for prestressing hollow square pile |
| CN103266595A (en) * | 2013-06-03 | 2013-08-28 | 建华建材（中国）投资有限公司 | Rigid pile for composite foundation treatment and production method thereof |
| CN104895051A (en) * | 2011-08-12 | 2015-09-09 | 朱月琴 | Full pre-stressing precast concrete solid square pile and production method thereof |
| CN105442591A (en) * | 2015-11-06 | 2016-03-30 | 威海齐德新型建材有限公司 | High-performance low-prestressed concrete hollow square pile |
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| CN102211353A (en) * | 2011-05-26 | 2011-10-12 | 宿迁市固丰管桩有限公司 | Process for manufacturing centrifugal concrete pile |
| CN104895051A (en) * | 2011-08-12 | 2015-09-09 | 朱月琴 | Full pre-stressing precast concrete solid square pile and production method thereof |
| CN102383420A (en) * | 2011-08-17 | 2012-03-21 | 江苏建华管桩有限公司 | High-strength concrete prefabricated pile doped with fiber-reinforced plastic bar |
| CN102383420B (en) * | 2011-08-17 | 2014-01-15 | 江苏建华管桩有限公司 | High-strength concrete prefabricated pile doped with fiber-reinforced plastic bar |
| CN102518129A (en) * | 2011-12-29 | 2012-06-27 | 天津建城基业集团有限公司 | Post pressure-grouting pre-stressed hollow square pile and manufacturing method thereof |
| CN102518129B (en) * | 2011-12-29 | 2014-09-10 | 天津建城基业集团有限公司 | Post pressure-grouting pre-stressed hollow square pile and manufacturing method thereof |
| CN102704471A (en) * | 2012-05-22 | 2012-10-03 | 张俊峰 | Prestress solid concrete preformed pile |
| CN102979086B (en) * | 2012-12-17 | 2013-09-04 | 青岛兴河建材有限公司 | Prestressed concrete square pile and manufacturing method thereof |
| CN102995628A (en) * | 2012-12-17 | 2013-03-27 | 青岛兴河建材有限公司 | Precast reinforced concrete square pile and manufacturing method thereof |
| CN102979086A (en) * | 2012-12-17 | 2013-03-20 | 青岛兴河建材有限公司 | Prestressed concrete square pile and manufacturing method thereof |
| CN103225299A (en) * | 2013-03-29 | 2013-07-31 | 南通中技桩业有限公司 | Built-in anticorrosion structure for prestressing hollow square pile |
| CN103266595A (en) * | 2013-06-03 | 2013-08-28 | 建华建材（中国）投资有限公司 | Rigid pile for composite foundation treatment and production method thereof |
| CN103266595B (en) * | 2013-06-03 | 2016-02-24 | 建华建材（中国）投资有限公司 | A kind of rigid pile for complex ground treatment and production method thereof |
| CN105442591A (en) * | 2015-11-06 | 2016-03-30 | 威海齐德新型建材有限公司 | High-performance low-prestressed concrete hollow square pile |
| CN109227885A (en) * | 2018-11-14 | 2019-01-18 | 汤始建华建材(天津)有限公司 | A kind of prefabricated hollow square pile system of processing and processing technology |
| CN109227885B (en) * | 2018-11-14 | 2024-03-08 | 汤始建华建材(天津)有限公司 | Prefabricated hollow square pile machining system and machining process |
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