CN201158097Y - Large diameter pretensioned prestressing concrete tubular pipe - Google Patents
Large diameter pretensioned prestressing concrete tubular pipe Download PDFInfo
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- CN201158097Y CN201158097Y CNU2008200560200U CN200820056020U CN201158097Y CN 201158097 Y CN201158097 Y CN 201158097Y CN U2008200560200 U CNU2008200560200 U CN U2008200560200U CN 200820056020 U CN200820056020 U CN 200820056020U CN 201158097 Y CN201158097 Y CN 201158097Y
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Abstract
The utility model relates to a large-diameter pre-tensioned prestressed concrete pipe pile. The pipe pile is constituted by a plurality of tensioning steel bars which are longitudinally and circularly arranged, and spiral stirrups which are wound on the tensioning steel bars; concrete is then poured; the centrifugal forming is carried out by a centrifuge; and the tensioning pre-stressing force adopts a tensioning disc structure. The large-diameter pre-tensioned prestressed concrete pipe pile has the advantages that the diameter of the concrete pipe pile is as large as 800mm-1600mm, and the length of single joint is as long as 7m to 39m; and the production cost is low.
Description
Technical field
The utility model relates to the concrete tubular pile of using in the building foundation engineering, particularly a kind of large diameter pretensioned prestressing concrete tubular pipe.
Background technology
In architectural engineering, for urban skyscraper, bridge, port and pier,, need on ground, drive piles for satisfying the bearing capacity on basis, in order to reduce construction costs, generally adopt reinforced concrete pipe pile; In order to improve the impulsive force that concrete tubular pile bears piling machine, improve the penetrability of pile tube, generally adopt deformed bar to make concrete tubular pile (PHC), be about to reinforcing bar and make cylinder frame, insert in the punching block, cast concrete carries out stretch-draw to it after closing up punching block, make reinforcing bar bear prestressing force, again by carrying out maintenance behind the centrifuge centrifugal forming.
But, the present this reinforced concrete pipe pile of producing, generally all be diameter below 1200 millimeters, single-unit length is in 10 meters.Along with more and more large of container ship in the world, the depth of water to harbour requires also more and more higher simultaneously, even reach 20 meters, the above free part of pile body mud face will reach 23 meters, enter build-in point (10 times stake footpaths) as if guaranteeing that joint area buries, promptly 12 meters～14 meters, the single-unit length of stake just need reach 35 meters～37 meters, at present the domestic prestressed concrete pipe pile that meets above condition that lacks.Pile tube as the requirement of engineering larger diameter can only be selected steel-pipe pile for use, and the cost of steel-pipe pile is 2～3 times of concrete tubular pile, but also need pay very big anti-corrosion measure expense for a long time.
The utility model content
Technical problem of the present utility model is to provide that a kind of diameter is big, the great diameter and long degree pretensioned prestressed concrete pipe pile of single-unit length overlength.
In order to solve above technical problem, the utility model provides a kind of large diameter pretensioned prestressing concrete tubular pipe, this pile tube constitutes by the tension reinforcing steel bar of many vertical circular arrangement with around the tie hoop of tension reinforcing steel bar, insert punching block, the cast strong concrete, behind prestressed stretch-draw, by the centrifuge centrifugal forming, it is characterized in that again:
The outer diameter D of described concrete tubular pile is 800 millimeters～1600 millimeters, and length is 7 meters～39 meters, or:
1) pile tube outer diameter D=800 millimeter, wall thickness t=110 millimeter, stretch-draw muscle diameter d=10 millimeters～13 millimeters, totally 15～30, the long L of single-unit pile tube is 7 meters～39 meters;
2) pile tube outer diameter D=1000 millimeter, wall thickness t=130 millimeter, stretch-draw muscle diameter d=9 millimeters～14 millimeters, totally 32～40, the long L of single-unit pile tube is 7 meters～39 meters;
3) pile tube outer diameter D=1200 millimeter, wall thickness t=150 millimeter, stretch-draw muscle diameter d=10 millimeters～14 millimeters, totally 30～45, the long L of single-unit pile tube is 7 meters～39 meters;
4) pile tube outer diameter D=1300 millimeter, wall thickness t=150 millimeter, stretch-draw muscle diameter d=10 millimeters～14 millimeters, totally 24～48, the long L of single-unit pile tube is 7 meters～39 meters;
5) pile tube outer diameter D=1400 millimeter, wall thickness t=150 millimeter, stretch-draw muscle diameter d=10 millimeters～14 millimeters, totally 25～50, the long L of single-unit pile tube is 7 meters～39 meters.
The stretch-draw prestressing force of this concrete tubular pile adopts stretch-draw dish structure.
Pre-stretch-draw is an important process to reinforcing bar in the PHC stake is produced, and the anti-bending strength of pile tube is played a decisive role.Generally, promptly draw steel reinforcement cage, reach the regulation pulling force, stress is locked at (punching block plays the reaction frame effect) on the punching block with nut with screw rod producing the most of tensioning head method that adopts of the pile tube of diameter below 600 millimeters.This technology is fairly simple, but because tensioning head is thick inadequately, and it and punching block inwall always have certain interval, screw rod is longer in addition, like this stretch-draw oil cylinder piston and tension rod, punching block axis be not in same in the heart, adding all deformed bar length can not be absolute consistent, every reinforcing steel bar bear is also slightly variant, just cause end plate to tilt easily, cause end plate and pile tube axis out of plumb.This situation is also not too obvious to small-bore pile tube reaction, but produces the heavy caliber pile tube of 1300 millimeters of diameters, 1400 millimeters of diameters, if centre deviation a bit extends to the end plate external diameter and will cause tangible inclination.In order to solve this shortcoming, adopt stretch-draw dish structure, the impetus that makes stretch-draw is not to concentrate on the screw rod of center, but be distributed on the periphery of stretch-draw dish, mesh the rigidity stretch-draw dish stretch-draw that is tightened on the pile end board by rigid disc on the stretch-draw machine, by large-scale locking nut tension stress is locked at the punching block port again, guarantee that stretching force is subjected to evenly, end plate is difficult for tilting, and keeps vertical with the pile tube axis.
Described stretch-draw dish structure, be in concrete cast punching block, the built-in one stretch-draw dish more smaller than punching block internal diameter, the stretch-draw dish is connected with steel reinforcement cage end plate high-strength bolt, the stretch-draw dish stretches out the outer position of punching block and is equipped with locking nut, locking nut is identical with the diameter of stretch-draw dish, and locking nut is fixed on stretching force on the punching block, and punching block plays the reaction frame effect.Employing stretch-draw dish structure is guaranteed to stretch stressed even, and end plate is difficult for tilting, and is particularly suitable for the heavy caliber pile tube.
Superior effect of the present utility model is:
1) diameter of concrete tubular pile of the present utility model is big, is 800 millimeters～1600 millimeters, and single-unit length length is 7 meters～39 meters;
2) production cost of the present utility model is low.
Description of drawings
Fig. 1 is the structural representation of the utility model pile tube;
Fig. 2 (comprising Fig. 2 A, Fig. 2 B) for the A-A of Fig. 1 to view;
Fig. 3 is the structural representation of the utility model stretch-draw dish;
Fig. 4 is traditional tensioning head method stretch-draw prestressing force structure chart;
The number in the figure explanation
The 1-tension reinforcing steel bar; The 2-tie hoop;
3-end plate apron ring; The 4-dowel;
5-stretch-draw dish; 6-steel reinforcement cage end plate;
The 7-punching block; The 8-locking nut;
The 9-tensioning head.
The specific embodiment
See also shown in the accompanying drawing, the utility model will be further described.
Cracking resistance moment of flexure according to pile tube requires the establishment framework of steel reinforcement, insert punching block 7 cast and stir the concrete that forms by the strong concrete match ratio, close up punching block framework of steel reinforcement is applied prestressing force synchronously, with centrifuge by low speed, middle low speed, middling speed and requirement centrifugal forming at a high speed, the band punching block carries out the steam curing first time, after the demoulding pile tube is carried out the HTHP maintenance second time, prestressed concrete pipe pile is made.
As depicted in figs. 1 and 2, large diameter pretensioned prestressing concrete tubular pipe, this pile tube constitutes by the tension reinforcing steel bar 1 of many vertical circular arrangement with around the tie hoop 2 of tension reinforcing steel bar, insert punching block 7, the cast strong concrete is behind prestressed stretch-draw, again by the centrifuge centrifugal forming
The outer diameter D of described concrete tubular pile is 800 millimeters～1600 millimeters, and length is 7 meters～39 meters, or:
1) pile tube outer diameter D=800 millimeter, wall thickness t=110 millimeter, stretch-draw muscle diameter d=10 millimeters～13 millimeters, totally 15～30, the long L of single-unit pile tube is 7 meters～39 meters;
2) pile tube outer diameter D=1000 millimeter, wall thickness t=130 millimeter, stretch-draw muscle diameter d=9 millimeters～14 millimeters, totally 32～40, the long L of single-unit pile tube is 7 meters～39 meters;
3) pile tube outer diameter D=1200 millimeter, wall thickness t=150 millimeter, stretch-draw muscle diameter d=10 millimeters～14 millimeters, totally 30～45, the long L of single-unit pile tube is 7 meters～39 meters;
4) pile tube outer diameter D=1300 millimeter, wall thickness t=150 millimeter, stretch-draw muscle diameter d=10 millimeters～14 millimeters, totally 24～48, the long L of single-unit pile tube is 7 meters～39 meters;
5) pile tube outer diameter D=1400 millimeter, wall thickness t=150 millimeter, stretch-draw muscle diameter d=10 millimeters～14 millimeters, totally 25～50, the long L of single-unit pile tube is 7 meters～39 meters.
Pre-stretch-draw is an important process to reinforcing bar in the PHC stake is produced, and the anti-bending strength of pile tube is played a decisive role.Generally, as shown in Figure 4, promptly draw steel reinforcement cage, reach the regulation pulling force, stress is locked at (punching block plays the reaction frame effect) on the punching block 7 with locking nut 8 with screw rod producing most of tensioning head 9 methods that adopt of the pile tube of diameter below 600 millimeters.This technology is fairly simple, but because tensioning head 9 is thick inadequately, and it and punching block 7 inwalls always have certain interval, screw rod is longer in addition, like this stretch-draw oil cylinder piston and tension rod, punching block axis be not in same in the heart, adding all deformed bar length can not be absolute consistent, every reinforcing steel bar bear is also slightly variant, just cause end plate to tilt easily, cause end plate and pile tube axis out of plumb.This situation is also not too obvious to small-bore pile tube reaction, but produces the heavy caliber pile tube of 1300 millimeters of diameters, 1400 millimeters of diameters, if centre deviation a bit extends to the end plate external diameter and will cause tangible inclination.In order to solve this shortcoming, adopt stretch-draw dish structure, the impetus that makes stretch-draw is not to concentrate on the screw rod of center, but be distributed on the periphery of stretch-draw dish 5, mesh the rigidity stretch-draw dish stretch-draw that is tightened on the pile end board by rigid disc on the stretch-draw machine, by large-scale locking nut 8 tension stress is locked at punching block 7 ports again, guarantee that stretching force is subjected to evenly, end plate is difficult for tilting, and keeps vertical with the pile tube axis.
As shown in Figure 3, the stretch-draw prestressing force of this concrete tubular pile adopts stretch-draw dish structure.Described stretch-draw dish structure, be in concrete cast punching block 7, the built-in one stretch-draw dish 5 more smaller than punching block 7 internal diameters, stretch-draw dish 5 is connected with steel reinforcement cage end plate 6 usefulness high-strength bolts, and stretch-draw dish 5 stretches out punching block 7 external positions locking nut 8, locking nut 8 is identical with the diameter of stretch-draw dish 5, withstand punching block 7 by the tensioning head that has oil cylinder during stretch-draw, pulling stretch-draw dish 5 is simultaneously by aerophor trip lock jack panel 8, whole prestressing force are fixed on the punching block 7, and punching block 7 plays the reaction frame effect.Employing stretch-draw dish 5 structures are guaranteed to stretch stressed even, and end plate is difficult for tilting, and is particularly suitable for the heavy caliber pile tube.
Claims (2)
1, a kind of large diameter pretensioned prestressing concrete tubular pipe, this pile tube constitutes by the tension reinforcing steel bar of many vertical circular arrangement with around the tie hoop of tension reinforcing steel bar, inserts punching block, the cast strong concrete, behind prestressed stretch-draw, by the centrifuge centrifugal forming, it is characterized in that again:
The outer diameter D of described concrete tubular pile is 800 millimeters～1600 millimeters, and length is 7 meters～39 meters, or:
1) pile tube outer diameter D=800 millimeter, wall thickness t=110 millimeter, stretch-draw muscle diameter d=10 millimeters～13 millimeters, totally 15～30, the long L of single-unit pile tube is 7 meters～39 meters;
2) pile tube outer diameter D=1000 millimeter, wall thickness t=130 millimeter, stretch-draw muscle diameter d=9 millimeters～14 millimeters, totally 32～40, the long L of single-unit pile tube is 7 meters～39 meters;
3) pile tube outer diameter D=1200 millimeter, wall thickness t=150 millimeter, stretch-draw muscle diameter d=10 millimeters～14 millimeters, totally 30～45, the long L of single-unit pile tube is 7 meters～39 meters;
4) pile tube outer diameter D=1300 millimeter, wall thickness t=150 millimeter, stretch-draw muscle diameter d=10 millimeters～14 millimeters, totally 24～48, the long L of single-unit pile tube is 7 meters～39 meters;
5) pile tube outer diameter D=1400 millimeter, wall thickness t=150 millimeter, stretch-draw muscle diameter d=10 millimeters～14 millimeters, totally 25～50, the long L of single-unit pile tube is 7 meters～39 meters.
The stretch-draw prestressing force of this concrete tubular pile adopts stretch-draw dish structure.
2, by the described large diameter pretensioned prestressing concrete tubular pipe of claim 1, it is characterized in that:
Described stretch-draw dish structure, be in concrete cast punching block, the built-in one stretch-draw dish more smaller than punching block internal diameter, the stretch-draw dish is connected with steel reinforcement cage end plate high-strength bolt, the stretch-draw dish stretches out the outer position of punching block and is equipped with locking nut, locking nut is identical with the diameter of stretch-draw dish, and locking nut just is fixed on stretching force on the punching block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200560200U CN201158097Y (en) | 2008-03-07 | 2008-03-07 | Large diameter pretensioned prestressing concrete tubular pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200560200U CN201158097Y (en) | 2008-03-07 | 2008-03-07 | Large diameter pretensioned prestressing concrete tubular pipe |
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| Publication Number | Publication Date |
|---|---|
| CN201158097Y true CN201158097Y (en) | 2008-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200560200U Expired - Fee Related CN201158097Y (en) | 2008-03-07 | 2008-03-07 | Large diameter pretensioned prestressing concrete tubular pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101837608A (en) * | 2010-04-08 | 2010-09-22 | 上海中技桩业股份有限公司 | Prestressed tube tensioning mold |
-
2008
- 2008-03-07 CN CNU2008200560200U patent/CN201158097Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101837608A (en) * | 2010-04-08 | 2010-09-22 | 上海中技桩业股份有限公司 | Prestressed tube tensioning mold |
| CN101837608B (en) * | 2010-04-08 | 2011-09-28 | 上海中技桩业股份有限公司 | Prestressed tube tensioning mold |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201402, Shanghai, Fengxian District Pu Wei Road No. 50 Patentee after: SHANGHAI ZHEZHONG GROUP CO., LTD. Address before: 201402, Shanghai, Fengxian District Pu Wei Road No. 50 Patentee before: Shanghai Zheshi Building Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081203 Termination date: 20160307 |