CN201330396Y - Prestressed concrete hollow square pile with high bearing capacity - Google Patents
Prestressed concrete hollow square pile with high bearing capacity Download PDFInfo
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- CN201330396Y CN201330396Y CNU2008201824367U CN200820182436U CN201330396Y CN 201330396 Y CN201330396 Y CN 201330396Y CN U2008201824367 U CNU2008201824367 U CN U2008201824367U CN 200820182436 U CN200820182436 U CN 200820182436U CN 201330396 Y CN201330396 Y CN 201330396Y
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Abstract
The utility model relates to a presstressed concrete hollow square pile with high bearing capacity, which aims to resolve the problem that existing hollow square piles are easy to blast during construction. The prestressed concrete hollow square pile with high bearing capacity comprises a steel square end plate, steel square tubular ferrules welded with the end plate and a reinforced concrete hollow pile body fixedly connected between the two end plate ferrules, wherein the pile body is formed by sequentially filling and solidifying a square-outer and circular-inner reinforced concrete layer and a plurality of annular concrete layers from outside to inside, wherein a reinforcement cage with two ends fixedly connected with the end plate is arranged inside the square-outer and circular-inner reinforced concrete layer. Two or more than two axial prestressed reinforced bars with two ends fixedly connected with the end plate are circumferentially and uniformly distributed in each annular concrete layer. The utility model changes structural mechanics property of conventional hollow piles, greatly increases bearing capacity of single pile with high penetrating power, can remarkably preventing pile blasting in construction, and reduces breakage rate of the pile.
Description
Technical field
The utility model relates to a kind of build concrete member, particularly relates to the stake of a kind of high-bearing capacity pre-stressed concrete hollow square.
Background technology
In building construction process, the stake of utilization side is constructed and Ground Treatment is a kind of comparatively ripe foundation basic construction technology of present stage.Its employed side's stake is Prefabricated Reinforced Concrete Square Pile and pre-stressed concrete hollow square stake.
Prefabricated Reinforced Concrete Square Pile is solid side's stake, is directly concrete to be filled in the prefabricated reinforcing bar, through the natural curing moulding.Owing to shaken the restriction of factors such as puddling and construction technology, there are shortcomings such as waste of material height such as concrete strength is low, steel in this type of stake.
The pre-stressed concrete hollow square stake is by fill concrete in prefabricated reinforcing cage, and through technology such as centrifugal, steam-cured and make.Because adopt traditional once filling, a centrifugation technique, this causes that useful cross section can only reach the 25%-50% in whole cross section, also there is very big hollow position in the stake.Because its stressed cross-sectional area is little, so the bearing capacity poor-performing of single pile structure correspondence is not ideal enough to the penetration power of hardpan in the piling process, the quick-fried stake situation that causes because of minimum construction deviation is comparatively general.Simultaneously,, in order to satisfy high tonnage carrying designing requirement, often need to use many multi-column pier foundations of cushion caps altogether in the construction, increased the weight of the expense of bearing platform construction, cause that construction cost is too high, waste is excessive owing to be subjected to the restriction of single pile bearing capacity.Therefore, how to improve the single pile bearing capacity of pre-stressed concrete hollow square stake, reduce construction cost, just become the technical problem that needs to be resolved hurrily in the prior art.
Summary of the invention
The purpose of this utility model is at the deficiencies in the prior art, and the high-bearing capacity pre-stressed concrete hollow square stake of non-explosive stake in a kind of construction is provided.
For achieving the above object, the stake of the utility model high-bearing capacity pre-stressed concrete hollow square, comprise steel square end plate, with a steel square tube shape cuff of plate welding, be connected in the concrete hollow pile body between the two ends sleeve-board hoop, pile body is from outside to inside by there being the be connected steel bar concrete layer of square-outside and round-inside of reinforcing cage of end plate and multilayer annular concrete layer of two ends successively to fill out the heart successively and be set in together in one deck.Concrete density height in its pile body, wall thickness is thick, and hollow aperture is little, is through secondary and the above heart, centrifugal, the steam-cured gained filled out.So design has simple in structurely, and the concrete compactness is big, the intensity height, and square pile lining thickens, and has improved the stressed cross-sectional area of single pile, and non-explosive stake makes it have stronger supporting capacity, stratum penetration capacity and whole conforming advantage in the construction.
As optimization, the reinforcing cage of described concrete hollow pile body is formed by connecting by many axial prestress reinforcing bar and spiral reinforcements arranged side by side; The steel end plate is all welded at the two ends of the reinforcing cage axial prestress reinforcing bar of described concrete hollow pile body; Or the steel end plate is all welded at axial prestress reinforcing bar and spiral reinforcement two ends; Or axial prestress reinforcing bar two ends all weld the steel end plate, and the steel cuff is all welded at the spiral reinforcement two ends.So design, the reinforcing cage of described concrete hollow pile body is formed by connecting by many axial prestress reinforcing bar and spiral reinforcements arranged side by side, and then few with muscle, structural performance is good.The steel end plate is all welded at the two ends of the steel disk cage axial prestress reinforcing bar of described concrete hollow pile body, and convenient the manufacturing in axial prestress reinforcing bar density hour, is difficult to the soundness that guarantees that end plate steel cuff and pile body are connected.The steel end plate is all welded at axial prestress reinforcing bar and spiral reinforcement two ends, and the soundness that then is connected is stronger, and stability is better.The steel end plate is all welded at axial prestress reinforcing bar two ends, and the steel cuff is all welded at the spiral reinforcement two ends, and then soundness is the strongest, stability is also best, particularly can significantly strengthen end plate steel cuff and pile body bonding strength, during piling, the crack occur between avoiding.
As optimization, be fixed with the oblique rollering steel muscle between every axial prestress reinforcing bar and the two ends end plate inboard anchor ring corresponding with interior one deck annular concrete layer.So design, because along with increasing considerably of pile body wall thickness, the axial prestress reinforcing bar also can carry bigger pile body from heavy load, and in the case, end plate is compared easier to be impaired in work progress with the rigidity joint face between the pile body with the pile body other parts; So, adopt the technical scheme that is fixed with the oblique rollering steel muscle between every axial prestress reinforcing bar and the two ends end plate inboard anchor ring corresponding with interior one deck annular concrete layer, be in order to strengthen between end plate and the pile body, particularly the bonding strength between end plate and the axial prestress reinforcing bar is strengthened the overall structure performance.
As optimization, be connected at circumferential equally distributed two ends axial prestress reinforcing bar of end plate of many more than two or two all in described every layer of annular concrete layer.So design; multilayer annular concrete layer all is to fill out the heart successively behind the row to solidify; transition interface that inevitably can influential bulk strength between each layer; moreover; be subjected to the protection of periphery reinforcing cage and the extruding of interior round power; though the internal layer concrete is difficult for inwardly to external diffusion; but because pile body is inwardly thickeied significantly from reinforcing cage; still occur the possibility of transverse crack, adopted this " in described every layer of annular concrete layer all many more than two or two be connected the axial prestress reinforcing bar of end plate " technical scheme for this reason at circumferential equally distributed two ends.
Its preparation method can be: 1, according to the specification requirement of pile body, make reinforcing cage, end plate, cuff, punching block, connect end plate and insert in the punching block at the two ends of reinforcing cage socket cuff, standby standard concrete, inject and be full of punching block equably by drawing-in device, the capping punching block; After the stretch-draw punching block is placed on the centrifuge, carry out centrifugally, topple over surplus slurry behind centrifugal the finishing; Implementing plug in the punching block bottom handles; Secondary is carried out in stake fill out the heart; The punching block of filling out behind the heart places on the centrifuge once more, carries out centrifugally, topples over surplus slurry behind centrifugal the finishing; Repeating to implement plug in the punching block bottom handles, fills out the heart, centrifugal, until reaching the wall thickness requirement; Require to carry out steam-cured according to strength grade of concrete; Put into the stockyard after the demoulding, the stake depanning, carry out natural curing.Can also be: 2, according to the specification requirement of pile body, make reinforcing cage, end plate, cuff, punching block, connect end plate and insert in the punching block at the two ends of reinforcing cage socket cuff, standby standard concrete, inject and be full of punching block equably by drawing-in device, the capping punching block; After the stretch-draw punching block is placed on the centrifuge, carry out centrifugally, topple over surplus slurry behind centrifugal the finishing; Require to carry out steam-cured according to strength grade of concrete; Implementing plug in the punching block bottom handles; Pile body is carried out secondary fill out the heart; The punching block of filling out behind the heart places on the centrifuge once more, carries out centrifugally, topples over surplus slurry behind centrifugal the finishing; Repeating to implement plug in the punching block bottom handles, fills out the heart, centrifugal and steam-cured, until reaching the wall thickness requirement; Put into the stockyard after the demoulding, the stake depanning, carry out natural curing.
The stake of the utility model high-bearing capacity pre-stressed concrete hollow square has broken through the wall thickness limit that present pre-stress hollow square pile production technology can reach, along with reducing significantly of the hollow aperture of hollow square pile, the lifting surface area of hollow square pile is increased, its structural mechanical property is significantly promoted, single pile bearing capacity improves a lot, hardpan is had stronger penetration capacity, and the situation that occurs quick-fried stake in the construction greatly reduces.Have easy, the reliable in quality of technology, change the structural mechanical property of former hollow pile, improve the bearing capacity of stake, reduce the breakage rate of stake, the advantage that market application foreground is wide.
Description of drawings
Description of drawings
Fig. 1 is vertical sectional structure schematic diagram of the utility model high-bearing capacity pre-stressed concrete hollow square stake;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is vertical sectional structure schematic diagram of second kind of embodiment of the utility model high-bearing capacity pre-stressed concrete hollow square stake;
Fig. 4 is the horizontal sectional structure schematic diagram of the third embodiment pile body part of the utility model high-bearing capacity pre-stressed concrete hollow square stake.
The specific embodiment
Embodiment one, shown in Fig. 1-2, the stake of the utility model high-bearing capacity pre-stressed concrete hollow square comprise steel square end plate 1, with the steel square tube shape cuff 2 of end plate 1 welding, be connected in the concrete hollow pile body 3 between two ends plate 1 cuff 2, pile body 3 is from outside to inside by there being the be connected steel bar concrete layer 5 of square-outside and round-inside of reinforcing cage of end plate 1 and two-layer annular concrete layer 51 of two ends successively to fill out the heart successively and be set in together in one deck.The reinforcing cage of described concrete hollow pile body 3 is formed by connecting by many axial prestress reinforcing bar 31 and spiral reinforcements arranged side by side; Steel end plate 1 is all welded at the two ends of the reinforcing cage axial prestress reinforcing bar 31 of described concrete hollow pile body.
Embodiment two, as shown in Figure 3, the stake of the utility model high-bearing capacity pre-stressed concrete hollow square comprise steel square end plate 1, with the steel square tube shape cuff 2 of end plate 1 welding, be connected in the concrete hollow pile body 3 between two ends plate 1 cuff 2, pile body 3 is from outside to inside by there being the be connected steel bar concrete layer 5 of square-outside and round-inside of reinforcing cage of end plate 1 and two-layer annular concrete layer 51 of two ends successively to fill out the heart successively and be set in together in one deck.The reinforcing cage of described concrete hollow pile body 3 is formed by connecting by many axial prestress reinforcing bar 31 and spiral reinforcements arranged side by side; Steel end plate 1 is all welded at the two ends of the reinforcing cage axial prestress reinforcing bar 31 of described concrete hollow pile body.Be fixed with oblique rollering steel muscle 32 between the corresponding inboard anchor ring of every axial prestress reinforcing bar 31 and two ends end plate 1 and interior one deck annular concrete layer 51.
Embodiment three, as shown in Figure 4, the stake of the utility model high-bearing capacity pre-stressed concrete hollow square comprise steel square end plate 1, with the steel square tube shape cuff 2 of end plate 1 welding, be connected in the concrete hollow pile body 3 between two ends plate 1 cuff 2, pile body 3 is from outside to inside by there being the be connected steel bar concrete layer 5 of square-outside and round-inside of reinforcing cage of end plate 1 and two-layer annular concrete layer 51 of two ends successively to fill out the heart successively and be set in together in one deck.The reinforcing cage of described concrete hollow pile body 3 is formed by connecting by many axial prestress reinforcing bar 31 and spiral reinforcements arranged side by side; Steel end plate 1 is all welded at the two ends of the reinforcing cage axial prestress reinforcing bar 31 of described concrete hollow pile body.Be connected at circumferential equally distributed two ends axial prestress reinforcing bar 31 of end plate 1 of many more than two or two all in described every layer of annular concrete layer 51.
Claims (4)
1, a kind of high-bearing capacity pre-stressed concrete hollow square stake, comprise steel square end plate, with a steel square tube shape cuff of plate welding, be connected in the concrete hollow pile body between the two ends sleeve-board hoop, it is characterized in that pile body is from outside to inside by there being the be connected steel bar concrete layer of square-outside and round-inside of reinforcing cage of end plate and multilayer annular concrete layer of two ends successively to fill out the heart successively and be set in together in one deck.
2, hollow abnormal shape side stake on the pretensioned prestressing coagulation according to claim 1 is characterized in that the reinforcing cage of described concrete hollow pile body is formed by connecting by many axial prestress reinforcing bar and spiral reinforcements arranged side by side; The steel end plate is all welded at the two ends of the reinforcing cage axial prestress reinforcing bar of described concrete hollow pile body; Or the steel end plate is all welded at axial prestress reinforcing bar and spiral reinforcement two ends; Or axial prestress reinforcing bar two ends all weld the steel end plate, and the steel cuff is all welded at the spiral reinforcement two ends.
3, hollow abnormal shape side stake on the pretensioned prestressing coagulation according to claim 2 is characterized in that being fixed with the oblique rollering steel muscle between every axial prestress reinforcing bar and the two ends end plate inboard anchor ring corresponding with interior one deck annular concrete layer.
4,, it is characterized in that all having in described every layer of annular concrete layer be connected at the circumferential equally distributed two ends axial prestress reinforcing bar of end plate of more than two or two many according to hollow abnormal shape side stake on claim 1 or the 2 or 3 described pretensioned prestressing coagulations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201824367U CN201330396Y (en) | 2008-12-31 | 2008-12-31 | Prestressed concrete hollow square pile with high bearing capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201824367U CN201330396Y (en) | 2008-12-31 | 2008-12-31 | Prestressed concrete hollow square pile with high bearing capacity |
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| Publication Number | Publication Date |
|---|---|
| CN201330396Y true CN201330396Y (en) | 2009-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201824367U Expired - Lifetime CN201330396Y (en) | 2008-12-31 | 2008-12-31 | Prestressed concrete hollow square pile with high bearing capacity |
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| CN (1) | CN201330396Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851916A (en) * | 2010-06-01 | 2010-10-06 | 上海中技桩业股份有限公司 | Concrete precast pile |
| CN104631450A (en) * | 2015-01-19 | 2015-05-20 | 德翰智慧科技有限公司 | Prestressed concrete pile |
-
2008
- 2008-12-31 CN CNU2008201824367U patent/CN201330396Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851916A (en) * | 2010-06-01 | 2010-10-06 | 上海中技桩业股份有限公司 | Concrete precast pile |
| CN101851916B (en) * | 2010-06-01 | 2013-10-16 | 上海中技桩业股份有限公司 | Concrete precast pile |
| CN104631450A (en) * | 2015-01-19 | 2015-05-20 | 德翰智慧科技有限公司 | Prestressed concrete pile |
| CN104631450B (en) * | 2015-01-19 | 2017-07-07 | 德翰智慧科技有限公司 | Prestressed-concrete pile |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091021 |