CN101041964A - Pretensioned prestressing concrete shape tube pile and method for producing same - Google Patents
Pretensioned prestressing concrete shape tube pile and method for producing same Download PDFInfo
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- CN101041964A CN101041964A CN 200710067995 CN200710067995A CN101041964A CN 101041964 A CN101041964 A CN 101041964A CN 200710067995 CN200710067995 CN 200710067995 CN 200710067995 A CN200710067995 A CN 200710067995A CN 101041964 A CN101041964 A CN 101041964A
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Abstract
The invention discloses a pretensioned prestress concrete special tubular pile, comprising a tubular pile (1) made from steel bar concrete with end plates at two ends while the pile extends axially from inner and outer radiuses, horizontal baffles uniformly arranged axially in the inner hole of the tubular pile (1), and an annular horizontal baffle (2) made from steel bar concrete and integrated with the steel bar concrete of tubular pile (1), while the axial distance of the horizontal baffles (2) are different. The production uses general method to produce tubular pile (1), as well as produces annular horizontal baffles (2), that produces a steel bar cage of annular horizontal baffles (2), fixing axial distance of baffle (2) on the steel bar cage and mounting horizontal baffle template, while irrigating tubular pile (1) and annular horizontal baffle (2) at same time. The inventive tubular pile can effectively improve rigidity, flexibility, bending resistance and crack resistance of tubular pile, and confirm the concrete quality of pile structural layer, without improving sink force and protrusion.
Description
Technical field
The present invention relates to a kind of build concrete member and preparation method thereof, specifically is a kind of Pretensioned prestressing concrete shape tube pile and preparation method thereof.
Background technology
The Pretensioned spun concrete piles of prior art is the prestressed concrete prefabricated units that adopt a kind of hollow cylinder that pretensioned prestressing technology and the moulding of concrete centrifugal method make.It generally is divided into prestressed concrete pipe pile (being called for short the PC stake), prestressed high strength concrete pile tube (being called for short the PHC stake) and thin tubular piles produced by prestressed concrete (being called for short the PTC stake).In numerous pile foundations, Pretensioned spun concrete piles has that bearing capacity of single pile is higher, advantages such as scope is wide, strong to the adaptive faculty of geological conditions, the bore forming environment is better, speed of application is very fast are selected in design for use.It has been widely used in the ground of all kinds building and has handled.At present, the Pretensioned spun concrete piles that uses in the civil engineering all is to produce and use with relevant national building standard atlas or other relevant province standard atlas with industry standard " pretensioning prestressed concrete thin-wall pipe pile " JC888-2001 by national standard " Pretensioned spun concrete piles " GB13476-1999.
But along with it applies the continuous expansion of face, the Pretensioned spun concrete piles that waits inside and outside footpath to extend vertically of prior art progressively presents following shortcoming: its rigidity and ductility and bending resistance, anti-crack ability still are apparent not enough, when especially this pile tube is used in the subgrade basis as in the piling construction process, often, promote the use of thereby influence it because operating modes such as soil compaction effect or soil excavation make that pile tube produces over-large displacement, stake is split and even engineering accident such as broken pile often has generation.
Chinese patent successively discloses the artificial two kinds of special-shaped pile tubes that improve the single pile ultimate bearing capacity and design of invention: every axially spaced-apart one segment distance on the pile tube pile body, and be provided with one and radially outward become big projection, it is trapezoidal that its shape can be, and also can be the ring shape.Objectively analyze, still have following deficiency if overcome the shortcoming of above prior art with this pile tube: the pile sinking power that 1, needs in the piling construction process is hammer force or embraces the pressure increase, is prone to the phenomenon that produces the crushing concrete tubular pile because of pile sinking power greater than the strength of materials of no protruding pile tube wall; 2, in the piling construction process, outer lug the soil body of process to be subjected to outer lug ground disturbance repeatedly, be prone to the various factors that are unfavorable for pile sinking such as pore water pressure raising, thereby influence pile sinking progress and quality; 3, outer lug in pile tube is made because centrifuging process makes concrete produce structural stratification is inevitable, common pile tube is layer of concrete, screed and cement paste layer from the outer wall to the inwall, but after outer lug has been arranged, then be prone to layer of concrete focus on the outer lug place and make tube pile structure layer (outer wall) thus concrete quality descends and to influence the phenomenon of pile tube bearing capacity; Though 4, since the outer lug angle greater than 90 ° because size is less, so, during the demoulding the local quality of concrete is still had certain influence.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of rigidity that can effectively improve pile tube and ductility and bending resistance, anti-crack ability is provided, avoids engineering accidents such as pile tube over-large displacement, cracking and even fracture to take place substantially and can guarantees the Pretensioned prestressing concrete shape tube pile of tube pile structure layer concrete quality when not increasing pile sinking power, the no outer lug disturbance soil body, making.
Another technical problem that the present invention will solve is that a kind of preparation method of above-mentioned Pretensioned prestressing concrete shape tube pile is provided.
Technical scheme of the present invention is, a kind of Pretensioned prestressing concrete shape tube pile with following structure is provided, comprise the tubulose pile body that the two ends that make of steel concrete have the inside and outside footpath of waiting vertically of end plate to extend, in the endoporus of tubulose pile body, axially be interval with tabula.
Described tabula be preferably steel concrete be added with steel fibre or the steel concrete of technical fiber or metal are made and with the steel concrete of tubulose pile body ring bodies tabula in aggregates.
The preferred steel of described metal, the preferred model of described steel is the steel of Q235.
The axially spaced-apart of described tabula distance is preferably equidistant or 2～5 meters of equi-spaced apart.
Another technical scheme of the present invention is, a kind of preparation method of Pretensioned prestressing concrete shape tube pile is provided, and comprises the reinforcing cage of making the tubulose pile body and makes two end plates; In the lower half circle punching block that the reinforcing cage and the two end plates of tubulose pile body is installed in accumbency; The concrete of cast tubulose pile body; The upper semi-circle punching block of tubulose pile body and lower half circle punching block are closed up and tighten up; The presstressed reinforcing steel of stretch-draw tubulose pile body; To the tubulose pile body carry out centrifugal forming, steam-cured, form removal gets finished product; Be characterized in that it also comprises the making tabula.
Described making tabula preferred fabrication steel concrete or be added with steel fibre or the concrete of technical fiber or metal are made and with the steel concrete of tubulose pile body ring bodies tabula in aggregates:
Cast-in-place method is made:
Make the reinforcing cage of a plurality of ring bodies tabulas; Behind the reinforcing cage and end plate of making the tubulose pile body, the reinforcing cage of ring bodies tabula is connected by the axially spaced-apart fixed distance of design on the longitudinal prestressing muscle or spiral bar of reinforcing cage of tubulose pile body; With the reinforcing cage of tubulose pile body and end plate together with installing in the lower half circle punching block of tubulose pile body that within it tabula reinforcing cage is installed in accumbency; The template of tabula is installed; Pour into a mould the concrete of ring bodies tabula simultaneously or be added with steel fibre or the concrete of technical fiber the concrete of cast tubulose pile body; Continue again the upper semi-circle punching block of tubulose pile body and lower half circle punching block to be closed up and tighten up and follow-up operation.
Or the method for watering after prefabricated is made:
Make with the steel concrete of tubulose pile body steel concrete in aggregates or be added with steel fibre or the concrete ring bodies tabula of technical fiber:
Make the reinforcing cage of a plurality of ring bodies tabulas and connect the connecting lacing wire that tubulose pile body reinforcing cage is used; The template of tabula is installed and reserves and connect the connecting lacing wire that tubulose pile body reinforcing cage is used; Fluid concrete or be added with steel fibre or the concrete of technical fiber, moulding, steam-cured, form removal obtains the prefabricated component of its external diameter greater than the ring bodies tabula of tubulose pile body regulation internal diameter; On the longitudinal prestressing muscle or spiral bar of axially spaced-apart apart from the reinforcing cage that is fixedly connected on the tubulose pile body through connecting lacing wire of prefabricated component with the ring bodies tabula by design; The reinforcing cage of tubulose pile body and end plate are installed in together with the prefabricated component that ring bodies tabula within it is installed in the lower half circle punching block of tubulose pile body of accumbency; Continue the concrete of later cast tubulose pile body and follow-up operation again.
Or the ring bodies tabula of the steel concrete of making and tubulose pile body metal in aggregates:
Make the ring bodies tabula of a plurality of metals, its external diameter is greater than the regulation internal diameter of tubulose pile body, it is embedded in a plurality of anchor ribs that are used for the concrete anchoring on the upper and lower end face of the ring bodies tabula in the tube wall of tubulose pile body, a plurality of connecting lacing wires of fixedlying connected with the reinforcing cage of tubulose pile body of being used for are arranged on the excircle of its metal ring body tabula, behind the reinforcing cage and end plate of making the tubulose pile body, on the longitudinal prestressing muscle or spiral bar of axially spaced-apart apart from the reinforcing cage that is fixedly connected on the tubulose pile body through connecting lacing wire of ring bodies tabula with metal by design; The reinforcing cage of tubulose pile body and end plate are installed in together with the prefabricated component that ring bodies tabula within it is installed in the lower half circle punching block of tubulose pile body of accumbency; Continue the concrete of later cast tubulose pile body and follow-up operation again.
In cast-in-place method is made, the template of described ring bodies tabula both sides preferably adopts two blocks of annular steel sheets, its external diameter is equal to the internal diameter of the punching block after the tubulose pile body closes up, in its two annular steel-sheet centre bores finer wire net is arranged, the longitudinal prestressing muscle of reinforcing cage of ccontaining tubulose pile body or the hole or the opening of spiral bar are arranged on the template, and template is fixed on the reinforcing cage of tubulose pile body.
During the method for watering after prefabricated is made, described steel concrete or be added with steel fibre or the external diameter of the prefabricated component of the concrete ring bodies tabula of technical fiber is preferably greater than the regulation internal diameter 40～60mm of tubulose pile body; The external diameter of the ring bodies tabula of described metal is preferably greater than the regulation internal diameter 80～120mm of tubulose pile body.
The preferred anchor bar of described anchor rib, described connecting lacing wire preferably sockets reinforcing bar, is the reinforcing bar of HPB235 or HRB335 as preferred model; The ring bodies tabula preferred fabrication steel ring bodies tabula of described making metal.
After adopting above structure, Pretensioned prestressing concrete shape tube pile of the present invention and preparation method thereof compared with prior art has following remarkable advantage and beneficial effect:
With in the prior art traditional wait vertically in, the Pretensioned spun concrete piles that external diameter extends is compared, the present invention is owing to axially be interval with the tabula of booster action in the endoporus of tubulose pile body, rigidity and the ductility and the bending resistance of pile tube have effectively been improved, anti-crack ability (referring to the test report in the specific embodiment), when this pile tube is used in the subgrade basis as in the piling construction process, substantially avoided the pile tube over-large displacement, engineering accidents such as cracking and even fracture ground takes place, thereby the large tracts of land that has guaranteed this pile tube is promoted the use of, and especially the large tracts of land on the soft foundation of coastal area is promoted the use of.
With prior art every axially spaced-apart one segment distance on the pile tube pile body the one special-shaped pile tube that radially outward becomes big projection is set and compares, the present invention is owing to be tabula in adopting, and pile tube in axial direction waits external diameter, so:
1, not needing to increase pile sinking power in the piling construction process is hammer force or armful pressure, has avoided producing greater than the strength of materials of no protruding pile tube wall because of pile sinking power the phenomenon of crushing concrete tubular pile.
2, in the piling construction process, outer tube wall not can to the soil body of process carry out disturbance repeatedly, avoid occurring the various factors that are unfavorable for pile sinking such as pore water pressure raising, effectively guaranteed pile sinking progress and quality.
3, in pile tube is made because the effect of centrifuging process, cement layer of sand, screed are moved in the position, overcome outer lug in pile tube is made since centrifuging process make concrete produce structural stratification so that make tube pile structure layer (outer wall) thus concrete quality decline influences the phenomenon of pile tube bearing capacity; Tube pile structure layer concrete quality is improved, and bearing capacity strengthens.
4, during the demoulding, no matter be that tubulose pile body and ring bodies tabula are poured into a mould or not cast simultaneously simultaneously, can not influence the quality of tubulose pile body, especially adopt cast simultaneously, can also effectively improve the defective of concrete delamination, favourable to improving the tubulose pile quality on the contrary.
Preparation method of the present invention also has manufacturing process and does not have special technical requirement, its manufacture craft is easy, the efficiency advantages of higher.
Description of drawings
Fig. 1 is the sectional structure schematic diagram of the special-shaped pile tube of the present invention.
Fig. 2 is the sectional view along A-A line among Fig. 1.
Fig. 3 is sectional structure (amplification) schematic diagram of the cast-in-place legal system of employing of the special-shaped pile tube of the present invention when making concrete ring-type body tabula.
Fig. 4 is that the sectional structure schematic diagram of legal system when making concrete ring-type body tabula watered in the employing of the special-shaped pile tube of the present invention after prefabricated.
Fig. 5 is that the sectional structure schematic diagram of legal system when making metal ring body tabula watered in the employing of the special-shaped pile tube of the present invention after prefabricated.
Shown in the figure 1, the tubulose pile body, 2, the ring bodies tabula, 3, the template of tabula, 4, the presstressed reinforcing steel or the spiral bar of pile body, 5, anchor rib, 6, connecting lacing wire, 7, the lower half circle punching block of tubulose pile body.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
As shown in Figure 1 and Figure 2.
Pretensioned prestressing concrete shape tube pile of the present invention comprises that there is the tubulose pile body 1 that waits inside and outside footpath to extend vertically of the end plate that connects usefulness at the two ends that make of steel concrete.
Pretensioned prestressing concrete shape tube pile characteristics of the present invention are axially to be interval with the tabula of booster action in the endoporus of tubulose pile body 1.Described tabula be that steel fibre or technical fiber (market is all on sale) were made or be added with to steel concrete steel concrete is made or metal is made and with the steel concrete of tubulose pile body 1 ring bodies tabula 2 in aggregates.The preferred steel of described metal, the preferred model of described steel is the steel of Q235.
The axially spaced-apart of described tabula distance is not for equidistantly or 2～5 meters of equi-spaced apart.
The preparation method of Pretensioned prestressing concrete shape tube pile of the present invention is as follows:
One of preparation method (referring to Fig. 3): cast-in-place method is made:
Making is provided with the steel concrete of tubulose pile body 1 steel concrete in aggregates or is added with steel fibre or the special-shaped pile tube of the concrete ring bodies tabula 2 of technical fiber:
Make the reinforcing cage of tubulose pile body 1 and make two end plates by the method for prior art; Make the reinforcing cage of a plurality of ring bodies tabulas 2; The reinforcing cage of ring bodies tabula 2 connected by the axially spaced-apart fixed distance of design as welding or butting on longitudinal prestressing (steel) muscle 4 or spiral (steel) muscle 4 of the reinforcing cage of tubulose pile body 1; With the reinforcing cage of tubulose pile body 1 and end plate together with installing in the lower half circle punching block 7 of tubulose pile body 1 that within it tabula reinforcing cage is installed in accumbency; Described punching block has only external mold and does not have internal mold; The template 3 of ring bodies tabula 2 both sides is installed, template 3 adopts two blocks of annular steel sheets (as thick 0.6～0.8mm), the hole of the longitudinal prestressing muscle 4 of reinforcing cage of ccontaining tubulose pile body 1 or spiral bar 4 or opening (not shown) are arranged on the template 3 and be fixed on the longitudinal prestressing muscle 4 or spiral bar 4 of reinforcing cage of tubulose pile body 1, the upper semi-circle (not shown) after the external diameter of two templates 3 is equal to tubulose pile body 1 and closes up and the internal diameter of lower half circle (when all referring to accumbency) outer steel mould, the gauze wire cloth that thin (as diameter 0.1mm) arranged in the centre bore of template 3, routinely as can be known, two templates 3 are parallel each other; The concrete of cast tubulose pile body 1, pour into a mould the concrete of ring bodies tabula 2 simultaneously or be added with steel fibre or the concrete of technical fiber, routinely as can be known, the amount of fluid concrete is all calculated in advance, generally slightly exceeds the radius of the template 3 of the last plane of lower half circle punching block and tabula; The upper semi-circle punching block of tubulose pile body 1 and lower half circle punching block are closed up and tighten up; The presstressed reinforcing steel of stretch-draw tubulose pile body 1; Tubulose pile body 1 and ring bodies tabula 2 are carried out centrifugal forming, promptly become to be provided with and be linked to be the tubulose pile body 1 of its whole centre bore less than the ring bodies tabula 2 of tubulose pile body 1 endoporus with tubulose pile body 1; Steam-cured according to a conventional method again, form removal gets tubulose pile body 1 finished product.In fact the template 3 of described ring bodies tabula 2 is solidly fixed with tubulose pile body 1 and ring bodies tabula 2, a small amount of superfluous water discharge that the finer wire net in the centre bore of template 3 then will be centrifugal goes out.
Two of preparation method: the method for watering after prefabricated is made:
Divide during the described method of watering after prefabricated is made to make and be provided with steel concrete or be added with steel fibre or the special-shaped pile tube of the ring bodies tabula 2 of the steel concrete of technical fiber and make the special-shaped pile tube of the ring bodies tabula 2 that is provided with metal.
Making is provided with the steel concrete of tubulose pile body 1 steel concrete in aggregates or is added with steel fibre or the special-shaped pile tube of the ring bodies tabula 2 of the steel concrete of technical fiber (referring to Fig. 4):
Make the reinforcing cage and the two end plates of tubulose pile body 1; The reinforcing cage of a plurality of ring bodies tabulas 2 of fabrication techniques and connect the connecting lacing wire 6 that tubulose pile body 1 reinforcing cage is used routinely; The template of tabula 2 is installed and reserves and connect the connecting lacing wire 6 that tubulose pile body 1 reinforcing cage is used; Fluid concrete or be added with steel fibre or the concrete of technical fiber, moulding, steam-cured, prefabricated component (being prefabricated ring bodies tabula 2) that form removal obtains ring bodies tabula 2; Described steel concrete or be added with steel fibre or the external diameter of the prefabricated component of the concrete ring bodies tabula 2 of technical fiber greater than the i.e. 40～60mm of bore of the tubulose pile body 1 of design in advance of tubulose pile body 1 regulation internal diameter, treat that promptly the circumferential edges of the prefabricated component of ring bodies tabula 2 after 1 moulding of tubulose pile body has in the inwall that is partially submerged into tubulose pile body 1; On the longitudinal prestressing muscle 4 or spiral bar 4 of axially spaced-apart apart from the reinforcing cage that is fixedly connected on tubulose pile body 1 through connecting lacing wire 6 of prefabricated component with ring bodies tabula 2 by design; The reinforcing cage of tubulose pile body 1 and end plate are installed in together with the prefabricated component that ring bodies tabula 2 within it is installed in the lower half circle punching block 7 of tubulose pile body 1 of accumbency; Described punching block has only external mold and does not have internal mold; The concrete of cast tubulose pile body 1, the amount of fluid concrete is all calculated in advance, generally slightly exceeds the last plane of lower half circle punching block 7; The upper semi-circle punching block of tubulose pile body 1 and lower half circle punching block 7 are closed up and tighten up; The presstressed reinforcing steel of stretch-draw tubulose pile body 1; Tubulose pile body 1 is carried out centrifugal forming, promptly become to be provided with tubulose pile body 1 and be linked to be the tubulose pile body 1 of its whole centre bore less than the ring bodies tabula 2 of tubulose pile body 1 endoporus, steam-cured according to a conventional method again, form removal gets tubulose pile body 1 finished product.
Or make the special-shaped pile tube (referring to Fig. 5) be provided with the ring bodies tabula 2 of the steel concrete of tubulose pile body 1 metal in aggregates such as Q235 steel:
Make the reinforcing cage and the two end plates of tubulose pile body 1; The employing routine techniques makes a plurality of metals such as model is the ring bodies tabula 2 of the steel of Q235, its external diameter is greater than the about 80～120mm of regulation internal diameter of tubulose pile body 1, in other words, after treating that tubulose pile body 1 is made into finished product, ring bodies tabula 2 external diameters of steel radially stretch into the inwall about 1/2nd to 2/3rds of tubulose pile body 1; It is embedded in a plurality of anchor ribs 5 of tightening up with concrete of being used on the upper and lower end face of the steel ring bodies tabula 2 in the tube wall of tubulose pile body 1, it is embedded in a plurality of connecting lacing wires 6 of fixedlying connected with the reinforcing cage of tubulose pile body 1 of being used on the excircle of the ring bodies tabula 2 in the tube wall of tubulose pile body 1; On the longitudinal prestressing muscle 4 or spiral bar 4 of axially spaced-apart apart from the reinforcing cage that is fixedly connected on tubulose pile body 1 through connecting lacing wire 6 of ring bodies tabula 2 with metal material by design; With the reinforcing cage of tubulose pile body 1 and end plate together with installing in the lower half circle punching block 7 of tubulose pile body 1 that within it steel ring bodies tabula 2 is installed in accumbency; The concrete of cast tubulose pile body 1, the amount of fluid concrete is all calculated in advance, generally slightly exceeds the last plane of lower half circle punching block 7; The upper semi-circle punching block of tubulose pile body 1 and lower half circle punching block are closed up and tighten up; The presstressed reinforcing steel of stretch-draw tubulose pile body 1; Tubulose pile body 1 is carried out centrifugal forming, promptly become to be provided with and be linked to be the tubulose pile body 1 of its whole centre bore less than the ring bodies tabula 2 of tubulose pile body 1 endoporus with tubulose pile body 1; Steam-cured according to a conventional method again, form removal gets tubulose pile body 1 finished product.Described anchor rib 5 is the reinforcing bar of HPB235 or HRB335 with connecting lacing wire 6 general employing reinforcing bars such as model.
Provide the present invention below and be provided with rigidity and ductility and bending resistance cracking resistance result of the test and analysis with the special-shaped pile tube of the steel concrete of tubulose pile body 1 steel concrete ring bodies tabula 2 in aggregates:
Way of contrast is adopted in test, gets two kinds of different pile tubes: a kind of is that the standard pile tube PTC500 * 65, the second kinds of prior art is the special-shaped pile tube that the present invention is provided with steel concrete ring bodies tabula 2.Its result of the test relatively is listed in the table below.
Pile tube rigidity and ductility and bending resistance cracking resistance result of the test and comparison
| Pile foundation | Ultimate bending moment | Mode of failure | Compare % | |||||
| Moment of flexure value KN.m | Amount of deflection mm | The maximum wide mm in crack | The crack bar | Crack average headway mm | Cracking resistance | Bending resistance | ||
| The criterion calculation value | 99 | / | / | / | / | One of three | 1 | 1 |
| Standard pile | 107.2 | 18.4 | 0.40 | 3 | 346 | Disconnected many of reinforcing bar | 1.05 | 1.08 |
| Be provided with the pile tube of ring- | 127.3 | 36.3 | 1.0 | 9 | 287 | A reinforcing bar is disconnected | 1.01 | 1.28 |
Annotate: the standard of comparison calculated value is a benchmark.
More as can be known, the actual measurement ultimate bending moment of each pile tube illustrates that all greater than calculated value its manufacture craft and quality are guaranteed from above-mentioned result of the test.But the ductility of rigidity and ultimate bending moment and member just is very different, and promptly first kind of pile tube ultimate bending moment is only big by 8% than calculated value for the standard pile tube, and the secundal viae stake improves nearly 30%.Simultaneously to improve also be clearly to its member ductility, and (test span 7.2m) mid-span deflection 18.4mm only only be equivalent to L/400, and the secundal viae pile element is reaching 36.3mm during first kind of pile tube ultimate limit state, is equivalent to L/200.And the crack Breadth Maximum during the ultimate limit state previous stage also has obvious difference, and first kind of pile tube is about 0.4mm, and the secundal viae stake reaches 1.0mm.The bar number in crack also is respectively first kind 3, second kind 9 successively simultaneously, and average crack spacing is 346mm, 287mm, illustrates that the ductility raising of second kind of special-shaped pile tube of the present invention also is very significant.
Be the sign that reinforcing bar is broken though especially what deserves to be mentioned is the ultimate limit state of two kinds of pile tubes, but the result also has very big difference, seldom only 1 of the disconnected muscle quantity of secundal viae stake of the present invention, so unloading back closing up of cracks is very good, almost estimate less than the crack, and the rigidity recovery is also fine, pile tube still stile is straight, preceding cardinal principle is not identical with doing experiment, and still has certain bearing capacity.The pile tube of prior art is then because many presstressed reinforcing steels are broken, and the stake maximum crack width surpasses more than the 4mm after the ultimate limit state, and the distortion of place, crack stake can not recover, completely without carrying may.
Need to prove, below only provide the present invention and be provided with special-shaped pile tube rigidity and ductility and bending resistance cracking resistance result of the test and analysis with the steel concrete of tubulose pile body 1 steel concrete ring bodies tabula 2 in aggregates, illustrate and adopt the steel concrete tabula positive effect to be arranged improving pile tube rigidity and ductility and cracking resistance and bending resistance.Yet as can be known according to general knowledge, in the tabula 2 of steel concrete, add a certain amount of steel fibre or technical fiber, its intensity must be higher than the intensity of ordinary reinforced concrete tabula 2, in other words, adopt the rigidity of pile tube of the steel concrete tabula add steel fibre or technical fiber and ductility and anti-crack ability and bending resistance must be equal to or be better than adopting rigidity and ductility and the anti-crack ability and the bending resistance of the pile tube of ordinary reinforced concrete tabula.Equally, according to general knowledge as can be known, the intensity of steel is far above the intensity of steel concrete, as the compressive strength design load f=215N/mm of Q235 steel
2, and the steel concrete of pile tube (PC) stake is when to be the strength grade of the steel concrete of tabula be C60, its compressive strength design load fc=27.5N/mm
2.Obviously, the intensity of steel tabula is far above the intensity of ordinary reinforced concrete tabula.In other words, the pile tube rigidity of employing steel tabula and ductility and anti-crack ability and bending resistance also are equal to or are better than adopting rigidity and ductility and the cracking resistance rigidity and the bending resistance of the pile tube of ordinary reinforced concrete tabula.So above-mentioned result of the test can illustrate that fully Pretensioned prestressing concrete shape tube pile of the present invention has advantage described in the foregoing invention content and beneficial effect.
Structure of the present invention and preparation method thereof not only is confined to above embodiment, and allows multiple variation, as: as described in the shape of tabula be not limited to ring bodies, also can (adopt prefabricated after the method for watering make) as pie with holes; The material of described tabula also can adopt engineering plastics (its intensity is higher than the intensity of steel concrete equally); Described tabula also can be the ring bodies tabula that opening is arranged on the inner hole wall that is stretched in tubulose pile body 1 by the steel strainer; The axially spaced-apart distance of described tabula also can be 2～5 meters equidistant distances in addition; In the preparation method, the order of some step is not very strict, can carry out simultaneously as the reinforcing cage of making tubulose pile body 1 and the reinforcing cage of making ring bodies tabula 2, can do one of them arbitrarily earlier yet; The setting of the diameter of the thickness of tabula and the external diameter of ring bodies, centre bore and anchor rib and connecting lacing wire is different and different according to concrete pile tube diameter and functional requirement especially then; Or the like.More than change all in protection scope of the present invention.
Claims (10)
1, a kind of Pretensioned prestressing concrete shape tube pile comprises the tubulose pile body (1) that the two ends that make of steel concrete have the inside and outside footpath of waiting vertically of end plate to extend, and it is characterized in that: axially be interval with tabula in the endoporus of tubulose pile body (1).
2, Pretensioned prestressing concrete shape tube pile according to claim 1 is characterized in that: described tabula be steel concrete be added with steel fibre or the concrete of technical fiber or metal are made and with the steel concrete of tubulose pile body (1) ring bodies tabula (2) in aggregates.
3, Pretensioned prestressing concrete shape tube pile according to claim 2 is characterized in that: described metal finger steel.
4, Pretensioned prestressing concrete shape tube pile according to claim 3 is characterized in that: described steel refer to that model is the steel of Q235.
5, according to any one described Pretensioned prestressing concrete shape tube pile in the claim 1～4, it is characterized in that: the axially spaced-apart of described tabula distance is not for equidistantly or 2～5 meters of equi-spaced apart.
6, a kind of preparation method of Pretensioned prestressing concrete shape tube pile comprises the reinforcing cage of making tubulose pile body (1) and makes two end plates; In the lower half circle punching block that the reinforcing cage and the two end plates of tubulose pile body (1) is installed in accumbency; The concrete of cast tubulose pile body (1); The upper semi-circle punching block of tubulose pile body (1) and lower half circle punching block are closed up and tighten up; The presstressed reinforcing steel of stretch-draw tubulose pile body (1); To tubulose pile body (1) carry out centrifugal forming, steam-cured, form removal gets finished product; It is characterized in that: it also comprises the making tabula.
7, the preparation method of Pretensioned prestressing concrete shape tube pile according to claim 6 is characterized in that: described making tabula refer to make steel concrete be added with steel fibre or the concrete of technical fiber or metal are made and with the steel concrete of tubulose pile body (1) ring bodies tabula (2) in aggregates:
Cast-in-place method is made:
Make the reinforcing cage of a plurality of ring bodies tabulas (2); Behind the reinforcing cage and end plate of making tubulose pile body (1), the reinforcing cage of ring bodies tabula (2) is connected by the axially spaced-apart fixed distance of design on the longitudinal prestressing muscle or spiral bar of reinforcing cage of tubulose pile body (1); With the reinforcing cage of tubulose pile body (1) and end plate together with installing in the lower half circle punching block (7) of tubulose pile body (1) that within it tabula reinforcing cage is installed in accumbency; The template (3) of tabula (2) is installed; Pour into a mould the concrete of ring bodies tabula (2) simultaneously or be added with steel fibre or the concrete of technical fiber the concrete of cast tubulose pile body (1); Continue again the upper semi-circle punching block of tubulose pile body (1) and lower half circle punching block to be closed up and tighten up and follow-up operation;
Or the method for watering after prefabricated is made:
Make with the steel concrete of tubulose pile body (1) steel concrete in aggregates or be added with steel fibre or the concrete ring bodies tabula (2) of technical fiber:
Make the reinforcing cage of a plurality of ring bodies tabulas (2) and connect the connecting lacing wire (6) that tubulose pile body (1) reinforcing cage is used; The template of tabula (2) is installed and reserves and connect the connecting lacing wire (6) that tubulose pile body (1) reinforcing cage is used; Fluid concrete or be added with steel fibre or the concrete of technical fiber, moulding, steam-cured, form removal obtains the prefabricated component of its external diameter greater than the ring bodies tabula (2) of tubulose pile body (1) regulation internal diameter; On the longitudinal prestressing muscle (4) or spiral bar (4) of axially spaced-apart apart from the reinforcing cage that is fixedly connected on tubulose pile body (1) through connecting lacing wire (6) of prefabricated component with ring bodies tabula (2) by design; The reinforcing cage of tubulose pile body (1) and end plate are installed in together with the prefabricated component that ring bodies tabula (2) within it is installed in the lower half circle punching block (7) of tubulose pile body (1) of accumbency; Continue the concrete of later cast tubulose pile body (1) and follow-up operation again;
Or the ring bodies tabula (2) of the steel concrete of making and tubulose pile body (1) metal in aggregates:
Make the ring bodies tabula (2) of a plurality of metals, its external diameter is greater than the regulation internal diameter of tubulose pile body (1), its be embedded in ring bodies tabula (2) in the tube wall of tubulose pile body (1) on, a plurality of anchor ribs (5) that are used for the concrete anchoring are arranged on the lower surface, a plurality of connecting lacing wires (6) of fixedlying connected with the reinforcing cage of tubulose pile body (1) of being used for are arranged on the excircle of its metal ring body tabula (2), behind the reinforcing cage and end plate of making tubulose pile body (1), on the longitudinal prestressing muscle (4) or spiral bar (4) of axially spaced-apart apart from the reinforcing cage that is fixedly connected on tubulose pile body (1) through connecting lacing wire (6) of ring bodies tabula (2) with metal by design; The reinforcing cage of tubulose pile body (1) and end plate are installed in together with the prefabricated component that ring bodies tabula (2) within it is installed in the lower half circle punching block (7) of tubulose pile body (1) of accumbency; Continue the concrete of later cast tubulose pile body (1) and follow-up operation again.
8, the preparation method of Pretensioned prestressing concrete shape tube pile according to claim 7, it is characterized in that: in cast-in-place method is made, the template (3) of described ring bodies tabula (2) both sides adopts two blocks of annular steel sheets, its external diameter is equal to the internal diameter of the punching block after tubulose pile body (1) closes up, in its two annular steel-sheet centre bores finer wire net is arranged, the longitudinal prestressing muscle (4) of reinforcing cage of ccontaining tubulose pile body (1) or the hole or the opening of spiral bar (4) are arranged on the template (3), and template (3) is fixed on the reinforcing cage of tubulose pile body (1).
9, the preparation method of Pretensioned prestressing concrete shape tube pile according to claim 7, it is characterized in that: during the method for watering after prefabricated is made, described steel concrete or be added with steel fibre or the external diameter of the prefabricated component of the concrete ring bodies tabula (2) of technical fiber greater than the regulation internal diameter 40～60mm of tubulose pile body (1); The external diameter of the ring bodies tabula (2) of described metal is greater than the regulation internal diameter 80～120mm of tubulose pile body (1).
10, according to the preparation method of claim 7 or 8 or 9 described Pretensioned prestressing concrete shape tube piles, it is characterized in that: described anchor rib (5) refers to anchor bar; Described connecting lacing wire (6) refers to socket reinforcing bar; The ring bodies tabula (2) of described making metal refers to make steel ring bodies tabula (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710067995A CN101041964B (en) | 2007-04-11 | 2007-04-11 | Method for producing pretensioned prestressing concrete shape tube pile |
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| CN200710067995A CN101041964B (en) | 2007-04-11 | 2007-04-11 | Method for producing pretensioned prestressing concrete shape tube pile |
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| CN101041964B CN101041964B (en) | 2010-05-26 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102102363B (en) * | 2009-12-21 | 2012-07-04 | 德翰智慧科技有限公司 | Foundation pile and construction method thereof |
| CN102561322A (en) * | 2012-03-09 | 2012-07-11 | 天津建城基业集团有限公司 | Anti-bending and anti-shearing enhanced pipe pile |
| CN102680396A (en) * | 2012-05-21 | 2012-09-19 | 上海交通大学 | Device with stirrup and for testing binding force of reinforcing steel bar and concrete |
| CN102680397A (en) * | 2012-05-21 | 2012-09-19 | 上海交通大学 | Device for testing binding force of reinforcing steel bar and concrete |
| CN104047288A (en) * | 2014-07-11 | 2014-09-17 | 北京建筑大学 | Method for improving adhesion between full-thread fiber resin bar body and concrete through fiber |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3899891A (en) * | 1974-01-22 | 1975-08-19 | William F Kelly | Post-tensioned prestressed pile assembly |
| JP2000160552A (en) * | 1998-11-30 | 2000-06-13 | Nippon Concrete Ind Co Ltd | Friction pile |
| CN1730938A (en) * | 2004-08-04 | 2006-02-08 | 邱金和 | power generation device |
| CN100560318C (en) * | 2006-01-05 | 2009-11-18 | 姜中云 | A high bearing capacity prestressed pipe pile and its production method |
| CN201024422Y (en) * | 2007-04-11 | 2008-02-20 | 浙江大学宁波理工学院 | Pretensioned prestressed concrete shaped tube pile |
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2007
- 2007-04-11 CN CN200710067995A patent/CN101041964B/en not_active Expired - Fee Related
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| CN102102363B (en) * | 2009-12-21 | 2012-07-04 | 德翰智慧科技有限公司 | Foundation pile and construction method thereof |
| CN102561322A (en) * | 2012-03-09 | 2012-07-11 | 天津建城基业集团有限公司 | Anti-bending and anti-shearing enhanced pipe pile |
| CN102680396A (en) * | 2012-05-21 | 2012-09-19 | 上海交通大学 | Device with stirrup and for testing binding force of reinforcing steel bar and concrete |
| CN102680397A (en) * | 2012-05-21 | 2012-09-19 | 上海交通大学 | Device for testing binding force of reinforcing steel bar and concrete |
| CN104047288A (en) * | 2014-07-11 | 2014-09-17 | 北京建筑大学 | Method for improving adhesion between full-thread fiber resin bar body and concrete through fiber |
| CN104047288B (en) * | 2014-07-11 | 2016-11-23 | 北京建筑大学 | The method improving Full-thread fiber resin rod body and concrete binding with fiber |
| CN110389060A (en) * | 2019-07-01 | 2019-10-29 | 浙江大学 | A sample preparation device for the bamboo pile-cement-soil contact surface and a shear test device and test method for the study of the friction characteristics of the contact surface |
| CN111648352A (en) * | 2020-06-23 | 2020-09-11 | 中国建筑西南勘察设计研究院有限公司 | A nested connection pipe pile structure |
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