CN1560380A - Structure of precast rainforced concrete tubular pile and manufacture method thereof - Google Patents
Structure of precast rainforced concrete tubular pile and manufacture method thereof Download PDFInfo
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- CN1560380A CN1560380A CNA2004100060526A CN200410006052A CN1560380A CN 1560380 A CN1560380 A CN 1560380A CN A2004100060526 A CNA2004100060526 A CN A2004100060526A CN 200410006052 A CN200410006052 A CN 200410006052A CN 1560380 A CN1560380 A CN 1560380A
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Abstract
The invention is a preprocessed steel bar concrete pipe structure. The structure includes concrete, primary steel bar of steel bar cage, ring or spiral type steel bard cage hooping, the pile head metal connection component at two ends of the pile and other constructing components, the steel cage primary bar is the one with non pretensioned prestressing. The method is: the steel bar cage made up of non pretensioned prestressing steel bar and hooping is produced according to the design; the steel bar cage is connected with the pile head metal components, arranges with each kind of embedded component; the steel bar cage is put into the steel model, pours the concrete in the model, completes the pile perform; the steel model assembled with a pile perform rotates around the spindle, the concrete is centrifugated and compacted and formed; maintenance and demolding. The structure and producing method does not uses pretensioned prestressing and restrain the process with special prestressing steel bar, but with normal steel bar or other additive material, the demands is low, the material is enough.
Description
Technology neck or
The present invention relates to prefabricated reinforced concrete pile tube as the building deep foundation, being meant especially to be used for non-prestressed, the strong concrete pile cutoff structure that non-paddle type mill is planted piling method, is master's high-bearing capacity pile cutoff structure and its making, mounting method as adopting boring socketed pile and construction of Static Pressure Pile method.
Background technology
The paddle type mill precast concrete pile overwhelming majority that present pile foundation is used is prestressed concrete pipe pile, be called for short PHC (precast concrete square pile, because of its production technology falls behind, bearing capacity is low and withdraw from pile foundation engineering gradually), its primary structure: the termination steel plate of pre-tensioned prestressing main reinforcement, helical form reinforcing bar, two ends and steel skirtboard thereof etc., the inserts of pile tube wall is a concrete.Fig. 5 then shows the connection state of two adjacent tubes pile cutoff terminations.Its advantage is as follows:
1. intensity height: specially designed concrete mix and additive, centrifugal molding process and autoclave autoclave curing, concrete crushing strength is greater than 80MPa, therefore pile tube bearing capacity height has extremely strong penetration capacity simultaneously, is fit to all kinds of corresponding pile driver injection operations.
2. good endurance: because the PHC tubular pile concrete adopts centrifugal forming, autoclave curing, so density is good, the intensity height, thus its impermeability and corrosion resistance are very good.
3. steady quality is reliable: production technology maturation, paddle type mill are driven piles the successful Application more than ten years.
4. economical: main material is a concrete, and ample supply and prompt delivery, bearing capacity and price proportion are H shaped steel 1/2～2/3.
5. produce, construct fast: mechanical production line, computer control, the staff operational ton is few, the production efficiency height.Adopt common solder technology between the pile cutoff, lower than the solder technology requirement of H shaped steel, need not resemble H shaped steel and do a large amount of rust preventings, speed of application is fast.
But it also has following shortcoming:
1. the concrete tubular pile that is primarily aimed at paddle type mill piling construction method and designs, make, the tensile stress that produces when adopting the pre-tensioned prestressing structure effectively to resist hammering, but prestressing force production technology difficulty height, production equipment and measuring apparatus investment are huge, and non-general enterprise can do and obtain.
2. prestressed reinforcement neither the common building reinforcing bar, but the high tensile stress reinforcing bar of three times of yield strength serious offense common building reinforcing bars, price is very high, and the source of goods is rare.
3. the high tensile stress reinforcing bar of prestressing force in the concrete and outfit all is to apply for the short-term load of hammering, transportation and lifting generation, it not only can not provide bearing capacity for building, but also to consume concrete part bearing capacity, the potentiality of constructional materials are not given full play of.
4. precast prestressed concrete pipe stake, though have higher bending rigidity, but its reinforcing bar content is on the low side, add that prestressing force in its concrete also is subjected to hammering, transportation, lifting condition influence and cutting pile crown and runs off, big pulling force and flexural stress be can't resist, compressive strength, flexural strength and the extremely low defective of bending rigidity three matching degree caused.But the vertical load that the pile foundation of highrise building is born often is accompanied by higher horizontal force, and these actual conditions cause the shaped steel pile foundation of certain areas not replaced by prefabricated Pretensioned spun concrete piles fully.
Summary of the invention
The structure and the preparation method that the purpose of this invention is to provide a kind of prefabricated reinforced concrete pile tube, it utilizes the above-mentioned advantage of pile for prestressed pipe and overcomes its shortcoming, so that substitute the stake of H shaped steel, prestressed reinforced concrete pipe pile with low integrated cost in non-paddle type mill is planted the piling method construction field.
The object of the present invention is achieved like this, a kind of prefabricated reinforced concrete tube pile structure is provided, the stock that described pile tube forms tube wall is concrete and reinforcing bar, this tube pile structure comprises following material and member: concrete, concrete adds material, the reinforcing cage main reinforcement, annular or spirality reinforcing cage stirrup, the pile crown metal connecting piece at pile cutoff two and other structure accessory, the welding between the pile crown metal connecting piece is adopted in connection between the pile cutoff, bonding, bolt connects or their combined method connects, and it is characterized in that: it is identical that the kind of described pile cutoff reinforcing bar and content and common non-pre-tensioning system are given the stress reinforced concrete post.
Described pile cutoff can be various purposes and buries built-in fitting underground, comprise lifting, anchoring, grouting, antirust, loading test or the like built-in fitting, also can dispose the metal skirt hoop simultaneously and be pile crown metal connecting piece and metal skirt hoop configuration additional anchor member for outside, pile cutoff two or inner cavity surface or both.Described metal skirt hoop then forms prefabricated steel tube concrete pile when growing as if the employing steel pipe manufacturing and with pile cutoff is same.
Described prefabricated reinforced concrete pile tube inside and outside contour section configuration can be that circle also can be a polygon, and its cross dimensions can gradual change or sudden change.
Described prefabricated reinforced concrete pile tube pipe thickness can gradual change or sudden change, and the whole largest tube wall thickness long or local pile cutoff of pile cutoff forms solid pile or pile cutoff when equaling the pile tube radius.
Described prefabricated reinforced concrete pile tube can be made the concavo-convex surfaces externally and internally of various styles or smear various handtailor coatings at surfaces externally and internally, or stretch out various member in shear memories at prefabricated reinforced concrete pile tube surfaces externally and internally, in the prefabricated reinforced concrete pile tube, can fill various concrete materials the later stage.
The pile crown metal connecting piece at described prefabricated reinforced concrete pile tube pile cutoff two ends can be that steel plate or other finished product connect the steel member, above-mentioned pile crown steel plate can be punching steel plate or solid steel plate, also can weld various steel members in the above for purpose such as pile cutoff position centering or steel plate reinforcement in transportation, lifting, the prebored hole.
It can be the special additives of various purposes that described concrete adds material, as strengthen, early strong, diminishing, expansion, anticorrosive or the like, also can be the fibre of various material.
Main reinforcement in described pile crown metal connecting piece and the tube wall can be with being connected of welding, bolted mode or they, and can adopt main reinforcement in welding, the tube wall can stretch out certain-length outside the metal connecting piece with spiral stirrup, other structure accessory and pile crown skirt hoop.
Described pile cutoff main reinforcement can be single layout, also can arrange more and put, also can use tendon, refuting between the main reinforcement connects adopts being connected of overlap joint, welding, bolted mode or they, and the various surfacing measures of antirust function can be taked to comprise in described pile cutoff main reinforcement and stirrup surface.
Described prefabricated reinforced concrete pile tube can be transportation, lifting etc. pile cutoff is produced the situation of short-term, transient load and disposes permanent or interim post-tensioning prestressed steel or wire rope and anchorage element thereof.
The preparation method of prefabricated reinforced concrete pile tube of the present invention comprises following key step (order of individual steps can be carried out simultaneously, also can change or make up):
A: according to the reinforcing cage that is combined into by non-pretensioned prestressing main reinforcement and stirrup that designs and produces in the tube wall;
B: reinforcing cage is connected with the pile crown metal connecting piece, settles various built-in fittings and various constructional reinforcement;
C: concrete, the metering of interpolation material, mixing are stirred;
D: reinforcing cage is packed in the punching block, and concreting in punching block is finished the pile body blank;
E: the above-mentioned punching block of pile body blank that is equipped with is around the rotation of stake axle, concrete centrifugal is compacted, moulding;
F: adopt the combination or the demoulding stream curing once more afterwards of atmospheric steam curing or steam curing at high pressure or their various orders;
G: whether need permanent or interim post-tensioning prestressed steel or wire rope and anchorage element thereof to be installed for pile tube according to transportation, the decision of storage situation;
H: heap storage.
Beneficial effect of the present invention
Because the concrete that pile tube of the present invention adopted exceeds more than 2 times than common precast reinforced concrete pile or the concrete intensity of bored pile, therefore can save 30%～50% concrete amount, the bending rigidity of its horizontal direction i iron than stock size again is big, and the pile cutoff quality can not given stress and decreases because of the cancellation pre-tensioning system, so in non-paddle type mill is planted the pile foundation field of piling method, no matter aspect bearing capacity and the cost aspect all have higher odds ratio shaped steel stake just even better than prestressed concrete pipe pile.Qi You Dian is:
1. owing to do not need prestressed reinforcement in the manufacturing process, need not reinforcing bar is added prestressed Special Equipment, not restricted by this kind capacity of equipment, so can produce desirable large-sized pile tube.
2. pile tube of the present invention can be formulated the number of steel bars of reinforcing cage by the different concrete condition of its suffered load.More economical basic component is provided.
3. pile tube of the present invention is batch production production, reliable in quality, concrete strength, modulus of elasticity are high, and axial bearing capacity is big, bearing capacity, price be than the highest, can substitute expensive shaped steel stake and pile for prestressed pipe fully in non-paddle type mill is planted the pile foundation field of piling method.
4. its tube wall reinforcing bar of pile tube of the present invention and concrete can be identical with prestressed concrete pipe pile, also can be plain bars and concrete, and Feng Jian is by the people, and productibility heightens.
5, because the pattern of pipe pile reinforcing bar cage of the present invention and common stake, post much at one, is made simply, the producer of general construction technology just can make. and when adding some special additive in the concrete, the stream curing operation can shorten time even cancellation.
6. owing to pile tube steel content height of the present invention, bearing capacity improves greatly, mates more with the embedding rock drilled pile that large bearing capacity is provided, so make basic comprehensive cost significantly reduce.
7. owing to pile tube of the present invention, its production equipment and operation greatly reduce than the equipment and the operation of prestressed concrete pipe pile, and cost of production greatly reduces, and speed of production significantly promotes.
8. owing to pile tube of the present invention, its reinforcing cage main reinforcement can directly stretch into pile cap, forms real fixed end pile crown, improves the integral level rigidity of pile foundation greatly, and the horizontal movement under the effect of par power reduces greatly.
9. because pile tube of the present invention, the pile cutoff of its pile crown steel plate and other structure types to be connected compatibility the highest.If pile cutoff top section adopts a pile tube of the present invention, under with the pile cutoff of other structure types, the bending rigidity and the intensity that then can make full use of pile tube of the present invention improve whole horizontal force resistivity.
10. because pile tube of the present invention, aspect design, construction and check all than more convenient, more accurate, the easier satisfied local standard of prior art, the bearing capacity and the cost that just can change easily by size, strength grade and the quantity of adjusting the pile cutoff each several part are to satisfy different designing requirements.So, no matter project scale size, how construction environment changes, in non-paddle type mill is planted the pile foundation field of piling method as long as the adaptable place of prior art, the present invention nearly all can be used, because its resistance to corrosion is higher than the plain edition piling bar, so it is more extensive than the range of application of shaped steel stake.
Description of drawings
Introduce reinforced concrete pipe pile structure of the present invention below in conjunction with accompanying drawing.In institute's drawings attached, the identical member of the digital sign of identical mark.Each accompanying drawing is:
Fig. 1 is a reinforced concrete pipe pile segment structure schematic diagram of the present invention;
Fig. 2 is the cut-away view that dissects along A-A line among Fig. 1;
Fig. 3 is the cut-away view that dissects along B-B line among Fig. 1;
The specific embodiment
Fig. 1 is a reinforced concrete pipe pile segment structure schematic diagram of the present invention.Pile tube can be formed by connecting with known method by one or more pile tube sections.Each pipeline section all has following material and member: concrete and concrete add material 3, reinforcing cage main reinforcement 4, annular or spirality reinforcing cage stirrup 5, the pile crown metal connecting piece 1,2 at pile cutoff two and other structure accessory, reinforcing cage main reinforcement 4 does not comprise the pretensioned prestressing reinforcing bar.Therefore, it is compared with the prestress steel pile tube and can save cost minimizing operation.Fig. 2, Fig. 3 are respectively A-A, the B-B cut-away view among Fig. 1, their together exhibit concrete 3, reinforcing cage main reinforcement 4, annular or spirality reinforcing cage stirrup 5, the relativeness between the pile crown metal connecting piece 1,2 at pile cutoff two and other structure accessory.Pile tube of the present invention can be that a pipeline section is only arranged, and a plurality of pipeline sections that join by known manner also can be arranged.
Described pile cutoff can be various purposes and buries built-in fitting underground, comprise lifting, anchoring, grouting, antirust, loading test or the like built-in fitting, also can dispose the metal skirt hoop simultaneously and be pile crown metal connecting piece and metal skirt hoop configuration additional anchor member for outside, pile cutoff two or inner cavity surface or both.Described metal skirt hoop then forms prefabricated steel tube concrete pile when growing as if the employing steel pipe manufacturing and with pile cutoff is same.
Described prefabricated reinforced concrete pile tube inside and outside contour section configuration can be that circle also can be a polygon, and its cross dimensions can gradual change or sudden change.
Described prefabricated reinforced concrete pile tube pipe thickness can gradual change or sudden change, and the whole largest tube wall thickness long or local pile cutoff of pile cutoff forms solid pile or pile cutoff when equaling the pile tube radius.
Described prefabricated reinforced concrete pile tube can be made the concavo-convex surfaces externally and internally of various styles or smear various handtailor coatings at surfaces externally and internally, or stretch out various member in shear memories at prefabricated reinforced concrete pile tube surfaces externally and internally, in the prefabricated reinforced concrete pile tube, can fill various concrete materials the later stage.
The pile crown metal connecting piece at described prefabricated reinforced concrete pile tube pile cutoff two ends can be that steel plate or other finished product connect the steel member, above-mentioned pile crown steel plate can be punching steel plate or solid steel plate, also can weld various steel members in the above for purpose such as pile cutoff position centering or steel plate reinforcement in transportation, lifting, the prebored hole.
It can be the special additives of various purposes that described concrete adds material, as strengthen, early strong, diminishing, expansion, anticorrosive or the like, also can be the fibre of various material.
Main reinforcement in described pile crown metal connecting piece and the tube wall can be with being connected of welding, bolted mode or they, and can adopt main reinforcement in welding, the tube wall can stretch out certain-length outside the metal connecting piece with spiral stirrup, other structure accessory and pile crown skirt hoop.
Described pile cutoff main reinforcement can be single layout, also can arrange more and put, also can use tendon, refuting between the main reinforcement connects adopts being connected of overlap joint, welding, bolted mode or they, and the various surfacing measures of antirust function can be taked to comprise in described pile cutoff main reinforcement and stirrup surface.
Described prefabricated reinforced concrete pile tube can be transportation, lifting etc. pile cutoff is produced the situation of short-term, transient load and disposes permanent or interim post-tensioning prestressed steel or wire rope and anchorage element thereof.
The preparation method of prefabricated reinforced concrete pile tube of the present invention comprises following key step (order of individual steps can be carried out simultaneously, also can change or make up):
A: according to the reinforcing cage that is combined into by non-pretensioned prestressing main reinforcement and stirrup that designs and produces in the tube wall;
B: reinforcing cage is connected with the pile crown metal connecting piece, settles various built-in fittings and various constructional reinforcement;
C: concrete, the metering of interpolation material, mixing are stirred;
D: reinforcing cage is packed in the punching block, and concreting in punching block is finished the pile body blank;
E: the above-mentioned punching block of pile body blank that is equipped with is around the rotation of stake axle, concrete centrifugal is compacted, moulding;
F: adopt the combination or the demoulding stream curing once more afterwards of atmospheric steam curing or steam curing at high pressure or their various orders;
G: whether need permanent or interim post-tensioning prestressed steel or wire rope and anchorage element thereof to be installed for pile tube according to transportation, the decision of storage situation;
H: heap storage.
Claims (14)
1, a kind of prefabricated reinforced concrete tube pile structure, the stock that described pile tube forms tube wall is concrete and reinforcing bar, this tube pile structure comprises following material and member: concrete, the reinforcing cage main reinforcement, annular or spirality reinforcing cage stirrup, the pile crown metal connecting piece at pile cutoff two and other structure accessory, connection between the pile cutoff adopts welding, bonding, the bolt between the pile crown metal connecting piece to connect or their combined method connects, and it is characterized in that: described pile cutoff reinforcing bar is that non-pre-tensioning system is given the stress reinforcing bar.
2, prefabricated reinforced concrete pile tube as claimed in claim 1, it is characterized in that, described pile cutoff can be various purposes and buries built-in fitting underground, comprise lifting, anchoring, grouting, antirust, loading test or the like built-in fitting, also can dispose the metal skirt hoop simultaneously and be pile crown metal connecting piece and metal skirt hoop configuration additional anchor member for outside, pile cutoff two or inner cavity surface or both.
3, prefabricated reinforced concrete pile tube as claimed in claim 2 is characterized in that, described metal skirt hoop adopts steel pipe manufacturing and then forms pre-manufacture-illegal pre-tensioning system with pile cutoff when long and gives the stress steel tube concrete pile.
4, prefabricated reinforced concrete pile tube as claimed in claim 1 is characterized in that, described prefabricated reinforced concrete pile tube inside and outside contour section configuration can be that circle also can be a polygon, and its cross dimensions can gradual change or sudden change.
5, prefabricated reinforced concrete pile tube as claimed in claim 1 is characterized in that, described prefabricated reinforced concrete pile tube pipe thickness can gradual change or sudden change, and the whole largest tube wall thickness long or local pile cutoff of pile cutoff forms solid pile or pile cutoff when equaling the pile tube radius.
6, as claim 1 or 3 described prefabricated reinforced concrete pile tube and prefabricated steel tube concrete piles, it is characterized in that, described pile tube can be made the concavo-convex surfaces externally and internally of various styles or smear various handtailor coatings at surfaces externally and internally, or stretches out various member in shear memories at prefabricated reinforced concrete pile tube surfaces externally and internally.
7, prefabricated reinforced concrete pile tube as claimed in claim 1 is characterized in that, can later stage fill concrete or other material in the prefabricated reinforced concrete pile tube.
8, prefabricated reinforced concrete pile tube as claimed in claim 1, it is characterized in that, the pile crown metal connecting piece at described prefabricated reinforced concrete pile tube pile cutoff two ends can be that steel plate or other finished product connect the steel member, above-mentioned pile crown steel plate can be punching steel plate or solid steel plate, also can weld various steel members in the above for purpose such as pile cutoff position centering or steel plate reinforcement in transportation, lifting, the prebored hole.
9, prefabricated reinforced concrete pile tube as claimed in claim 1, it is characterized in that, it can be the special additives of various purposes that described concrete adds material, as strengthen, early strong, diminishing, expansion, anticorrosive or the like, also can be the fibre of various material.
10, prefabricated reinforced concrete pile tube as claimed in claim 1, it is characterized in that, main reinforcement in described pile crown metal connecting piece and the tube wall can being connected with welding, bolted mode or they, can adopt welding with spiral stirrup, other structure accessory and pile crown skirt hoop, the main reinforcement in the tube wall can stretch out metal connecting piece outside certain-length.
11, prefabricated reinforced concrete pile tube as claimed in claim 1, it is characterized in that, described pile cutoff main reinforcement can be single layout, also can arrange more and put, also can use tendon, refuting between the main reinforcement connects adopts being connected of overlap joint, welding, bolted mode or they, and the various surfacing measures of antirust function can be taked to comprise in described pile cutoff main reinforcement and stirrup surface.
12, prefabricated reinforced concrete pile tube as claimed in claim 1, it is characterized in that described prefabricated reinforced concrete pile tube can be transportation, lifting, variations in temperature etc. pile cutoff is produced the situation of short-term, transient load and disposes permanent or interim post-tensioning prestressed steel or steel strand rope and anchorage element thereof.
13, the preparation method of prefabricated reinforced concrete pile tube is characterized in that, comprises following key step (step c and step a and step b can be carried out simultaneously, also can change):
A: according to designing and producing the reinforcing cage that main reinforcement in the tube wall and stirrup are combined into;
B: reinforcing cage is connected with the pile crown metal connecting piece, settles various built-in fittings and various constructional reinforcement;
C: concrete, the metering of interpolation material, mixing are stirred;
D: reinforcing cage is packed in the punching block, and concreting in punching block is finished the pile body blank;
E: the above-mentioned punching block of pile body blank that is equipped with is around the rotation of stake axle, concrete centrifugal is compacted, moulding;
F: the pile cutoff concrete is taked maintenance, the demoulding or the demoulding, maintenance or maintenance, the demoulding, maintenance, reach the design strength in this stage until concrete.
G: whether need permanent or interim post-tensioning prestressed steel or wire rope and anchorage element thereof to be installed for pile tube according to transportation, the decision of storage situation.
14, the preparation method of prefabricated reinforced concrete pile tube as claimed in claim 13 is characterized in that, the described concrete curing of step f can be adopted atmospheric steam curing, steam curing at high pressure or their combination.
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| CN 200410006052 CN1560380B (en) | 2004-02-27 | 2004-02-27 | Precast reinforced concrete tubular pile |
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| CN 200410006052 CN1560380B (en) | 2004-02-27 | 2004-02-27 | Precast reinforced concrete tubular pile |
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| CN1560380B CN1560380B (en) | 2010-11-03 |
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| CN2387146Y (en) * | 1999-09-17 | 2000-07-12 | 铁道部科学研究院铁道建筑研究所 | Thin wall and light weight tubular pile |
| CN1411968A (en) * | 2002-11-25 | 2003-04-23 | 蒋元海 | Chemical prestress process for making steep pipe centrifugal concrete product |
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2004
- 2004-02-27 CN CN 200410006052 patent/CN1560380B/en not_active Expired - Fee Related
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