CN103882857A - Pre-tensioning method centrifugal concrete pile with steel strands and manufacturing method - Google Patents
Pre-tensioning method centrifugal concrete pile with steel strands and manufacturing method Download PDFInfo
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- CN103882857A CN103882857A CN201410100176.4A CN201410100176A CN103882857A CN 103882857 A CN103882857 A CN 103882857A CN 201410100176 A CN201410100176 A CN 201410100176A CN 103882857 A CN103882857 A CN 103882857A
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Abstract
The invention relates to a pre-tensioning method centrifugal concrete pile with steel strands. The pre-tensioning method centrifugal concrete pile comprises a concrete pile body, end plates and a steel bar cage. The steel bar cage comprises main prestressing bars and stirrups. The pre-tensioning method centrifugal concrete pile is characterized in that the main prestressing bars are the steel strands, the steel strands of at least one end of the steel bar cage are tightly combined with anchor rings which are provided with stepped through holes, the large hole portions of the stepped through holes are threaded holes, the small hole portions of the stepped through holes are conical holes with the aperture gradually increased from interior to exterior, a plurality of clamping pieces are placed inside the conical holes, a plurality of connecting counter holes are formed in the end plates, a threaded connecting piece is arranged inside each connecting counter hole, the end plates are connected with the threaded holes in the anchor rings through the threaded connecting pieces, and the end plates are further provided with a plurality of threaded connecting holes used for connection. According to the pre-tensioning method centrifugal concrete pile with the steel strands, in the pile manufacturing process, the anchor rings combined at the ends of the steel strands can be fixedly connected with the end plates, and the steel strands used as the main bars in the steel bar cage are tensioned and applied. The invention further relates to a manufacturing method of the pre-tensioning method centrifugal concrete pile.
Description
Technical field
The invention belongs to the technical field of the pile foundation engineering of all kinds of architectural structure systems, relate in particular to a kind of pre-tensioning system centrifugal concrete pile and relative manufacturing process with steel strand.
Background technology
All kinds of building structure generally all relates to pile foundation engineering, on existing market, apply to the product that pile foundation comparison between projects is many and have bored pile, prestressed centrifugally concrete tubular pile (comprising pile tube, square pile), but under the current level of economic development and Building technology condition, architectural design field has entered new developing stage, the requirement of pile foundation is also being improved constantly, the technical performance of existing product cannot meet the needs of fast-developing construction market, and highlights many serious technological deficiencies.
The development of prestressed centrifugally concrete pile, production start from the sixties in last century, when beginning, the main muscle of centrifugal concrete pile prestressing force mainly adopts high tensile steel wire, but high tensile steel wire is because diameter is little and circumference is light face, the defect of existence and grip of concrete deficiency, all technical cannot meet building needs.To the eighties in last century, prestressed centrifugally concrete pile starts to adopt steel bar for prestressed concrete as main muscle, because it is prefabrication, production efficiency is high, main rigidity of soft tissues degree is relatively high, the advantages such as concrete strength is high, it is convenient to construct, the cycle is very fast and be building field a large amount of, extensively adopt and continuity is always used so far dominate in conventional piles Foundation Design at present.But in production and application process, main muscle adopts the centrifugal concrete pile of rod iron to have more problem, and as larger in rod iron fragility, its tensile strength is low, and (its tensile strength design load is 1000MPa, tensile strength peak is 1420MPa), cannot meet current Building technology requirement; In production for the ease of stretch, must adopt the technology of rod iron heading, hot rod iron upsetting is gone out to a mushroom head, so that this heading and pile body end plate, stretch board are blocked and carry out prestressed stretch-draw, but can to cause the intensity at pier nose position to be undermined material impaired due to the heading of hot this rod iron of upsetting; , because rod iron pier nose precision is inconsistent, when stretch-draw, cannot fully contact with end plate meanwhile, cause end plate local failure; Rod iron, because cutting accuracy control is inadequate, causes rod iron length to differ, and there will be Stress non-homogeneity, the phenomenon of even breaking in stretching process; In addition, reinforcing cage is welding fabrication, and rod iron causes Material damage because high temperature freezes.Above-mentioned many disadvantages, causes existing main muscle to adopt the obviously deficiency of the technical performance such as bending resistance, shearing resistance of the centrifugal concrete pile of steel bar for prestressed concrete.In engineering application, produce larger moment of flexure and horizontal force because earthquake, typhoon and other uncertain factors can cause top, buildings pile basis, road and bridge or railway bridge also can produce because of the dynamic load of haulage vehicle larger moment of flexure and horizontal force.In the time that above-mentioned traditional centrifugal concrete pile is used for above-mentioned engineering, often cannot use because bending resistance and shear behavior are not enough, what in highrise building, show is especially serious.In addition,, in the engineering such as bracing of foundation pit, slope retaining, common centrifugal concrete pile is same because bending resistance and shear behavior deficiency cannot scale application.For security consideration, a lot of recent years of China have started to forbid to use centrifugal concrete pile in some pile foundation engineering.
Bored pile is widely used in the pile body in building pile foundation Foundation Design field as another kind, its making is that cast in situs completes, its production process is first to drill through a stake hole in building site, then reinforcing cage is put into a hole, to concrete perfusion in hole, rear natural curing to be formed can be used after reaching for a long time some strength again.This pile body has stronger vitality because it has high bearing capacity and can adapt to complicated geological, but the mud that this castinplace pile is taken out outside man-hour requirement processing is executed in making, and environment pollution is quite serious, less employing in external urban construction; Easy hole wall collapse, broken pile interlayer in bored pile piling process in addition, as solution cavity or cavity, more will cause a large amount of concrete wastes; And its construction costs is higher, larger on building costs impact; Because it is that cast in situs completes and needs long-time natural curing, can not realize batch production and produce, thereby efficiency is low, long in time limit.
Because the tensile strength of steel strand is high, (its tensile strength design load is 1320MPa, tensile strength reaches as high as 1960MPa), in recent years, enterprise of China and scientific research institution are also applied to centrifugal concrete pile to steel strand and have carried out large quantity research, but do not have so far the technical scheme of practical value.A kind of reinforcing cage as disclosed in the patent No. Chinese utility model patent " a kind of pipe pile reinforcing bar cage of being furnished with steel strand " that is ZL201220538453.6 (notification number is CN202865836U), its steel strand and prestressed steel bar are used in conjunction with, because rod iron and steel strand exist tensile strength poor, while applying integrated prestress at the same time, can only be with the low tensile strength control stretch-draw of rod iron, the high-tensile performance of steel strand is brought into play not out, therefore in this patent, steel strand are equal to rod iron role, and the due high-tensile performance of unrealized steel strand, if the tensile strength using steel strand is as control criterion, at the same time when integral tension, rod iron will be broken destruction.In addition, how concrete this patent do not disclose in pre-tensioning system centrifugal concrete pile connection, fixing, tension steel strand, so this patented technology does not substantially have real practical value and operability in pile foundation engineering.
And for example an application number is that the Chinese invention patent application " pre-tensioning system steel strand prestress concrete tubular pile " of CN200510050212.1 (notification number is CN1687534A) has disclosed a kind of like this concrete tubular pile with steel strand, the main muscle of its prestressing force adopts steel strand, on end plate, have stretchable holes, steel strand are made ground tackle through stretchable holes.But how this patent application does not disclose being connected and anchoring and concrete production method thereof of specific implementation steel strand and end plate, and for the field of those of ordinary skill manufacture to(for) pre-tensioning system centrifugal concrete pile, because professional span is large, generally also has no way of finding out about it and how steel strand are applied in the production of pre-tensioning system centrifugal concrete pile; In addition, show according to the accompanying drawing of the technical scheme of its description and this patent application, pile body end face after its moulding has outstanding ground tackle, pile extension can not be realized, this outstanding ground tackle is easily broken in construction piling process, thereby pile body prestressing force is destroyed and the technical performances such as its bending resistance, shearing resistance that detract.So, cannot produce by the technical scheme of its disclosure, also cannot be practically applicable to pile foundation engineering even if produced, this patent has only proposed steel strand to apply to the recapitulative technical though of pre-tensioning system centrifugal concrete pile theoretically at all, but cannot be applied in reality production and construction.
As seen from the above, the prestressed centrifugally concrete pile that a large amount of main muscle that use are rod iron in the market and bored pile all can not meet the needs of current pile foundation engineering, only also a kind of technical though and adopt steel strand at present as the pre-tensioning system centrifugal concrete pile of main muscle, because steel strand are by many stranded the forming of steel wire, be difficult for welding, be difficult for being wound around, itself be difficult for realizing with end plate firm fixing, therefore how steel strand are connected in pre-tensioning system centrifugal concrete pile, fixedly to realize the key of manufacturing the pre-tensioning system centrifugal concrete pile with steel strand, but even to this day, the appearance of the centrifugal concrete pile that there is no that to have main muscle that building practical is worth be steel strand both at home and abroad.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, overcome the be connected and fixed problem of steel strand in pre-tensioning system centrifugal concrete pile, make the main muscle of centrifugal concrete pile inside adopt steel strand to become and may and there is application value realistic, significantly improve the technical performance such as bending resistance, shearing resistance, tension of centrifugal concrete pile.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of pre-tensioning system centrifugal concrete pile with steel strand, comprise the concrete pile body of hollow, be positioned at the end plate of concrete pile end of body, be positioned at the reinforcing cage of concrete pile body, reinforcing cage comprises the main muscle of axial arranged prestressing force, stirrup outside described main muscle around the home, it is characterized in that: the main muscle of described prestressing force is steel strand, the described reinforcing cage at least steel strand of one end is tightly combined with anchor ring, described anchor ring has ladder hole, the macropore portion of ladder hole is screwed hole, the aperture portion of ladder hole is the bellmouth that aperture expands gradually from the inside to the outside, in bellmouth, be placed with multi-disc intermediate plate, the inner surface of each intermediate plate is provided with latch, this multi-disc intermediate plate amalgamation forms the chuck component in order to clip steel strand, the outer peripheral face of this chuck component forms the cone face matching with described bellmouth, in chuck component, be formed centrally internal tooth hole, described each steel strand are all through the interior perforation in corresponding chuck component and locked by interior perforation, have multiple connection counterbores near on the end plate of anchor ring, connect counterbore and steel strand corresponding setting one by one, respectively connect in counterbore and be equipped with a threaded connector, described end plate is connected with the screwed hole on described anchor ring by this threaded connector, on described end plate, also have multiple threaded connection holes in order to connect.
The steel strand at above-mentioned reinforcing cage two ends are tightly combined with described anchor ring by chuck component, and the two ends of steel strand all can be fixed by anchor ring and end plate like this, then end plate is connected and realizes stretch-draw with stretch board, anchor plate, certainly, also can be that the steel strand of only reinforcing cage one end and anchor ring knot merga pass anchor ring and end plate are fixed, again by stretch board, anchor plate connects realizes stretch-draw, the steel strand of the other end are not combined with anchor ring, in production, the steel strand of this other end can adopt alternate manner and anchor plate, stretch board or end plate connect, fixing to realize production, for example: in production the mould of this other end arrange outward two parallel, between be separated with certain space, there is perforation, and be the steel plate that a braced structures is welded and fixed, wherein a block plate props up mould and is fastened with the outer face of mould, play the effect of gripper shoe, the outer end of another block plate is provided with strand tapered anchorage, strand tapered anchorage is conventional components, steel strand are through stuck fixing by strand tapered anchorage after two block plates, thereby complete steel strand fixing of this other end, after concrete pile body completes, cut off the steel strand between this two block plate.
The periphery of the above-mentioned chuck component being made up of multi-disc intermediate plate is provided with cannelure, in this cannelure, is placed with the cranse in multi-disc intermediate plate hoop jail.Cranse can be wire loop or rubber ring, cranse is set and can makes the chuck component of multi-disc intermediate plate composition more firm.
Above-mentioned each chuck component is made up of three described intermediate plates.Through evidence, it is better that each chuck component forms its indices by three intermediate plates, and the location of steel strand and bellmouth is the most firm.
The outer peripheral face of above-mentioned anchor ring the inner is provided with one or more jacks that insert for instrument.Jack is set and facilitates anchor ring to be connected with stretch board or anchor plate, when connection, insertion tool in jack, instrument can be reinforcing bar or other hand-held tool, and the instrument of holding with a firm grip, prevents from being threaded connection part and in rotation process, drives anchor ring rotation.
Above-mentioned threaded connector has head and bar portion, and wherein head is sunken in the macropore portion that connects counterbore, and the bar portion of described threaded connector is provided with external screw thread, after the aperture portion of bar portion through connection counterbore, is threaded with described screwed hole.This threaded connector is actual is bolt.It is to be provided with the concrete pile body end plates of end plate and the connected mode of pile body, and wherein threaded connector is sunken in the macropore portion that connects counterbore, guarantees that threaded connector does not expose outside end plate, can not affect concrete pile and carry out pile extension by end plate.
The head of above-mentioned threaded connector is regular hexagon head.Convenient employing as Wrench rotation threaded connector.
Second technical problem to be solved by this invention is to provide a kind of manufacture and has as described in aforementioned claim the manufacture method of the pre-tensioning system centrifugal concrete pile of steel strand, it is characterized in that: manufacture method comprises following steps
(1), the customized cut-off of steel strand;
(2), make reinforcing cage, at least one end of steel strand is tightly combined with anchor ring by chuck component, at least one end plate is to be threaded connection part to be threaded with the screwed hole on anchor ring;
(3), the end plate of reinforcing cage one end is fixed together by bolt and stretch board or anchor plate, the steel strand of the other end of reinforcing cage and anchor plate or stretch board are fixed together, this reinforcing cage with stretch board is placed in to female die, stretch board is arranged in the die cavity of female die, the outer face laminating of anchor plate and female die;
(4), to female die feeding, upper mold section closes;
(5), stretch-draw, at one end by pulling stretch board to carry out integral tension to reinforcing cage, by Method of Steel Strand Stretching to regulation numerical value;
(6), centrifugal forming;
(7), stream curing;
(8), form removal and remove stretch board and anchor plate on bolt with put being connected of corresponding each end plate, complete pile body and make.
This manufacture method makes the possibility that creates of aforementioned pre-tensioning system centrifugal concrete pile, in the method, between each step, can form good connecting, and manufacturing process is simple and smooth, low cost of manufacture.
In above-mentioned steps 2, the two ends of steel strand are all tightly combined with anchor ring by chuck component, and described end plate has two, and two end plates is connected by the screwed hole on the anchor ring at this threaded connector and reinforcing cage two ends; In described step 3, the end plate of reinforcing cage one end is fixedly connected with stretch board by bolt, the end plate of the reinforcing cage other end is fixedly connected with anchor plate by bolt.
In above-mentioned steps 3, the steel strand of the reinforcing cage other end can not have anchor ring yet, and the steel strand of this end adopt alternate manner to be connected with stretch board or anchor plate, to fix, and for example adopt conventional strand tapered anchorage to fix steel strand.
Stretch-draw in above-mentioned steps 5 need to be used gripper shoe, screw rod and locking nut, described gripper shoe and the laminating of mould opposite side end face, described stretch board is connected with screw rod, the threaded shank of described screw rod is through the perforation in gripper shoe, described locking nut is threaded in screw flight bar portion, pull again screw rod and then pull stretch board and steel strand, Method of Steel Strand Stretching is locked with locking nut after the numerical value of regulation.
Stretch board can adopt following structure to be connected with screw rod, on above-mentioned stretch board, have counterbore, the threaded shank of described screw rod is inner through passing the perforation in gripper shoe after the counterbore stretch board from reinforcing cage again, and the head of described screw rod is sunken in the macropore portion of the counterbore on stretch board.Bolt head is sunken in the counterbore of stretch board, is for increasing concrete feeding space, makes pile crown after moulding, be unlikely to produce the problem that lacks material.
Compared with prior art, the invention has the advantages that: main muscle all adopts steel strand, make the tensile strength of winner's muscle consistent, pile body overall performance increases, the reinforcing cage at least steel strand of one end is tightly combined with anchor ring by chuck component, it is firm that anchor ring is connected with steel strand, anchor ring is in the time doing pulling experiment, more pull anchor ring, it is more firm that steel strand are combined with anchor ring, even if steel strand are broken, anchor ring can slippage yet, the macropore portion of anchor ring ladder hole is screwed hole in addition, therefore the anchor ring that is fixed on steel strand end and end plate can be threaded connection to part in concrete pile manufacturing process is threaded and is fixed together, threaded connection hole on end plate is in order to be bolted with stretch board and anchor plate, again end plate is fixed by bolt and stretch board, just can at one end pass through the stretch-draw to stretch board, realize the steel strand as main muscle in reinforcing cage are carried out to stretch-draw, in stretching process, steel strand can drive chuck component towards the small-bore direction retraction of bellmouth and by firmly fixing to chuck component and bellmouth, and make the further banding of interior perforation at chuck component center stuck steel strand, then carry out centrifugal forming, after completing, moulding unloads stretch board, fixing of anchor plate and end plate, complete the manufacture process of the centrifugal concrete pile with steel strand, pile body in this corresponding manufacturing method is just provided with end plate before moulding, therefore pile body is put an end plate in moulding, pile body is had to self compaction effect, make an end stress equalization, the centrifugal concrete pile that manufacture completes does not protrude the ground tackle portion of end plate, do not affect pile extension and piling, it is a kind of practicable centrifugal concrete pile with steel strand, and the connection of steel strand in this centrifugal concrete pile, locking mode advantages of simple, easy to operate and cost is low, make steel strand apply to centrifugal concrete pile to be achieved and to have the real value of industrial applicability, centrifugal concrete pile of the present invention, because having adopted the high steel strand of performance, improves its bending resistance, shearing resistance, tensile property greatly.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the A place enlarged drawing of Fig. 1;
Fig. 3 is the lateral view of the embodiment of the present invention;
Fig. 4 is that the B-B of Fig. 1 is to sectional view;
Fig. 5 is the perspective view of chuck component in the embodiment of the present invention;
Fig. 6 is the three-dimensional exploded view of chuck component in the embodiment of the present invention;
Fig. 7 be in the embodiment of the present invention anchor ring partly cut open figure;
Fig. 8 is the schematic diagram (removing upper mold section) of manufacturing the manufacture method of aforementioned pre-tensioning system centrifugal concrete pile;
Fig. 9 is the perspective view of manufacturing aforementioned pre-tensioning system centrifugal concrete pile mould therefor.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
As shown in Fig. 1～7, be the preferred embodiments of the present invention.
A kind of pre-tensioning system centrifugal concrete pile with steel strand, comprise hollow concrete pile body 1, be positioned at the end plate 2 of concrete pile body 1 end and be positioned at the reinforcing cage of concrete pile body 1, concrete pile body 1 can be circular stake, also can be barrette, polygonal pile and various pretensioned prestressing centrifugal concrete shaped pile, and end plate 2 has on two end faces that are connected to concrete pile body 1 two ends.Reinforcing cage comprises the main muscle of axial arranged prestressing force, the stirrup 4 outside main muscle around the home, the main muscle of prestressing force is steel strand 3, fixing between stirrup 4 and steel strand 3 can adopt manual colligation, also can adopt automatic binding machine colligation or other mechanical systems to fix, concrete pile body 1 can also axial arrangedly have nonprestressed reinforcement, anchor rib and pile protection hoop, its conventional design that is centrifugal concrete pile.
In the present embodiment, two of steel strand 3 ends are all tightly combined with anchor ring 5 by following chuck component 7, and the outer end of anchor ring 5 flushes with the outer face of described concrete pile body 1 or be lower slightly to avoid anchor ring 5 to protrude from the outer face of concrete pile body 1.Anchor ring 5 has ladder hole, the macropore portion of ladder hole is screwed hole 51, the aperture portion of ladder hole is the bellmouth 52 that aperture expands gradually from the inside to the outside, in bellmouth 52, be placed with multi-disc intermediate plate 6, the inner surface of each intermediate plate 6 is provided with latch 61, these multi-disc intermediate plate 6 amalgamations form the chuck component 7 in order to clip steel strand 3, the outer peripheral face of this chuck component 7 forms the cone face 71 matching with described bellmouth 52, in chuck component 7, be formed centrally internal tooth hole 72, each steel strand 3 are all locked through the interior perforation 72 in corresponding chuck component and by interior perforation 72.
The each chuck component 7 of the present embodiment is made up of three described intermediate plates 6.The periphery of chuck component 7 is provided with cannelure 73, in this cannelure 73, is placed with multi-disc intermediate plate 6 is bound round to firm cranse 74, and cranse 74 can be wire loop or rubber ring.
The outer peripheral face of anchor ring 5 the inners is provided with multiple jacks 53 that insert for instrument.Jack 53 is set and facilitates anchor ring to be connected with end plate 2, when connection, insertion tool in jack, instrument can be reinforcing bar or other hand-held tool, and the instrument of holding with a firm grip, prevents from being threaded connection part and in rotation process, drives anchor ring rotation.
On the end plate 2 at reinforcing cage two ends, have the connection counterbore 21 that number is identical with steel strand radical, connect counterbore 21 and steel strand 3 corresponding setting one by one, each connection in counterbore 21 is equipped with a threaded connector 8, this threaded connector 8 has head 81 and bar portion 82, wherein head 81 is sunken in the macropore portion that connects counterbore 21, the bar portion 82 of threaded connector 8 is provided with external screw thread, after the aperture portion of bar portion 82 through connection counterbore 21, is threaded with screwed hole 51.Certain aforementioned connection counterbore 21 also can be substituted by bellmouth, and the one that bellmouth is actually connection counterbore is equal to replacement.Connect after counterbore when bellmouth replaces, only the profile of the head of threaded connector 8 81 need be become to corresponding taper.
The body of rod that the centrifugal concrete pile that the present invention mentions can be used as electric pole uses, and the ground upper support bar also can be used as in telecomm base station, wind generator system uses, and also can be used as the supporter of other ground surface works, and utilization scope is extremely wide.
As shown in Figure 8,9, a kind of manufacture method as described in aforementioned claim with the pre-tensioning system centrifugal concrete pile of steel strand of manufacturing, this preparation method is all combined with anchor ring 5 as example taking the two ends of steel strand 3, comprises following steps
(1), the customized cut-off of steel strand 3;
(2), make reinforcing cage, the two ends of steel strand 3 are all tightly combined with anchor ring 5 by chuck component 7, the end plate 2 at reinforcing cage two ends is all threaded connection part 8 and is threaded with the screwed hole 51 on anchor ring 5;
(3), the end plate of reinforcing cage one end 2 is fixed together by bolt 15 and stretch board 10, the end plate 2 of the other end of reinforcing cage is fixed together by bolt 15 and anchor plate 11, this reinforcing cage with stretch board 10 is placed in to female die 9a, stretch board is arranged in the die cavity of female die 9a, and anchor plate 11 is fitted with the outer face of female die 9a;
The bar portion 82 of threaded connector 8 is provided with external screw thread, after the connection counterbore 21 of bar portion 82 through end plate, is threaded with the screwed hole 51 on anchor ring 5.
(4), to female die 9a feeding, upper mold section 9b closes;
(5), stretch-draw, at one end, by pulling stretch board 10 to carry out integral tension to reinforcing cage, steel strand 3 are stretched to the numerical value of regulation; In stretching process, steel strand 3 can drive chuck component 7 towards the small-bore direction retraction of bellmouth 52 and by firmly fixing to chuck component 7 and bellmouth 52, and make the further banding of interior perforation 72 the stuck steel strand at chuck component 7 centers;
(6), centrifugal forming;
(7), stream curing;
(8), form removal, remove bolt 15 on the threaded connector 8 on stretch board 10 and anchor plate 11 and put being connected of corresponding each end plate 2, complete the making of pile body.
Stretch-draw in step 5 need to be used gripper shoe 14, screw rod 12 and locking nut 13, gripper shoe 14 and the laminating of mould opposite side end face, on stretch board 10, have counterbore 101, the threaded shank of screw rod 12 is inner through passing the perforation in gripper shoe 14 after the counterbore 101 stretch board from reinforcing cage again, the head of screw rod 12 is sunken in the macropore portion of the counterbore 101 on stretch board 10, locking nut 13 is threaded on the thread rod part of screw rod 12, adopt again machinery to pull screw rod 12 and then pull stretch board 10 and steel strand 3, steel strand 3 are stretched to after the numerical value of regulation and lock with locking nut 13.
Claims (10)
1. one kind has the pre-tensioning system centrifugal concrete pile of steel strand, comprise the concrete pile body (1) of hollow, be positioned at the end plate (2) of concrete pile body (1) end, be positioned at the reinforcing cage of concrete pile body (1), reinforcing cage comprises the main muscle of axial arranged prestressing force, stirrup (4) outside described main muscle around the home, it is characterized in that: the main muscle of described prestressing force is steel strand (3), the described reinforcing cage at least steel strand of one end (3) is tightly combined with anchor ring (5), described anchor ring (5) has ladder hole, the macropore portion of ladder hole is screwed hole (51), the aperture portion of ladder hole is the bellmouth that aperture expands gradually from the inside to the outside (52), in bellmouth (52), be placed with multi-disc intermediate plate (6), the inner surface of each intermediate plate (6) is provided with latch (61), this multi-disc intermediate plate (6) amalgamation forms the chuck component (7) in order to clip steel strand (3), the outer peripheral face of this chuck component (7) forms the cone face (71) matching with described bellmouth (52), in chuck component (7), be formed centrally internal tooth hole (72), described each steel strand (3) are all locked through the interior perforation (72) in corresponding chuck component and by interior perforation (72), have multiple connection counterbores (21) near on the end plate (2) of anchor ring (5), connect counterbore (21) and steel strand (3) corresponding setting one by one, each connection in counterbore (21) is equipped with a threaded connector (8), and described end plate (2) is connected with the screwed hole (51) on described anchor ring (5) by this threaded connector (8), on described end plate (2), also have multiple threaded connection holes (22) in order to connect.
2. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 1, it is characterized in that: the steel strand (3) at described reinforcing cage two ends are tightly combined with described anchor ring (5) by chuck component (7), described concrete pile body (1) two ends are equipped with end plate (2).
3. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 1, it is characterized in that: the periphery of the described chuck component (7) being made up of multi-disc intermediate plate (6) is provided with cannelure (73), in this cannelure (73), is placed with multi-disc intermediate plate (6) is bound round to firm cranse (74).
4. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 1, is characterized in that: described each chuck component (7) is made up of three described intermediate plates (6).
5. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 1, is characterized in that: the inner outer peripheral face of described anchor ring (5) is provided with the jack (53) inserting for instrument.
6. according to the arbitrary described pre-tensioning system centrifugal concrete pile with steel strand of claim 1～5, it is characterized in that: described threaded connector (8) has head (81) and bar portion (82), wherein head (81) is sunken in the macropore portion that connects counterbore (21), the bar portion (82) of described threaded connector (8) is provided with external screw thread, after the aperture portion of bar portion (82) through connection counterbore (21), is threaded with described screwed hole (51).
7. manufacture has a manufacture method for the pre-tensioning system centrifugal concrete pile of steel strand as described in aforementioned arbitrary claim, it is characterized in that: described manufacture method comprises following steps
(1), the customized cut-off of steel strand (3);
(2), make reinforcing cage, at least one end of steel strand (3) is tightly combined with anchor ring (5) by chuck component (7), and at least one end plate (2) is to be threaded connection part (8) to be threaded with the screwed hole (51) on anchor ring (5);
(3), the end plate of reinforcing cage one end (2) is fixed together by bolt (15) and stretch board (10) or anchor plate (11), the steel strand (3) of the other end of reinforcing cage are fixed together with anchor plate (11) or stretch board (10), be placed in female die (9a) by being somebody's turn to do with the reinforcing cage of stretch board (10), stretch board is arranged in the die cavity of female die (9a), and anchor plate (11) is fitted with the outer face of female die (9a);
(4), to female die (9a) feeding, the upper mold section that closes (9b);
(5), stretch-draw, at one end, by pulling stretch board (10) to carry out integral tension to reinforcing cage, steel strand (3) are stretched to the numerical value of regulation;
(6), centrifugal forming;
(7), stream curing;
(8), form removal and remove stretch board (10) and anchor plate (11) on bolt (15) with put being connected of corresponding each end plate (2), complete the making of pile body.
8. preparation method according to claim 7, it is characterized in that: the two ends of steel strand in described step 2 (3) are all tightly combined with anchor ring (5) by chuck component (7), described end plate (2) has two, and two end plates (2) is connected by the screwed hole (51) on the anchor ring (5) at this threaded connector (8) and reinforcing cage two ends; In described step 3, the end plate of reinforcing cage one end (2) is fixedly connected with stretch board (10) by bolt (15), the end plate of the reinforcing cage other end (2) is fixedly connected with anchor plate (11) by bolt (15).
9. preparation method according to claim 7, it is characterized in that: the stretch-draw in described step 5 need to be used gripper shoe (14), screw rod (12) and locking nut (13), described gripper shoe (14) and the laminating of mould opposite side end face, described stretch board (10) is connected with screw rod (12), the threaded shank of described screw rod (12) is through the perforation in gripper shoe (14), described locking nut (13) is threaded on the thread rod part of screw rod (12), pull again screw rod (12) and then pull stretch board (9) and steel strand (3), steel strand (3) are stretched to after the numerical value of regulation with locking nut (13) locking.
10. preparation method according to claim 9, it is characterized in that: on described stretch board (9), have counterbore (101), the threaded shank of described screw rod (12) is inner through passing the perforation in gripper shoe (14) after the counterbore (101) stretch board from reinforcing cage again, and the head of described screw rod (12) is sunken in the macropore portion of the counterbore (101) on stretch board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410100176.4A CN103882857B (en) | 2014-03-17 | 2014-03-17 | A kind of pre-tensioning system centrifugal concrete pile and manufacture method with steel strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410100176.4A CN103882857B (en) | 2014-03-17 | 2014-03-17 | A kind of pre-tensioning system centrifugal concrete pile and manufacture method with steel strand |
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|---|---|---|---|---|
| US4604003A (en) * | 1983-02-22 | 1986-08-05 | Francoeur Ronald A | Method and apparatus for retensioning prestressed concrete members |
| CN2782763Y (en) * | 2005-04-08 | 2006-05-24 | 王伟明 | Pretensioned type steel strand prestressed concrete pipe pile |
| CN101054800A (en) * | 2007-05-11 | 2007-10-17 | 上海中技桩业发展有限公司 | Prestress high intensity concrete square pile and its production method and moulding die |
| CN201660883U (en) * | 2010-06-12 | 2010-12-01 | 江苏建华管桩有限公司 | End plate for uplift pile foundation |
| CN202323715U (en) * | 2011-11-30 | 2012-07-11 | 成都市市政工程（集团）有限责任公司 | Porous steel strand end anchoring device |
| CN102995635A (en) * | 2012-12-17 | 2013-03-27 | 青岛昊河水泥制品有限责任公司 | Prestressed concrete square pile and manufacturing method thereof |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604003A (en) * | 1983-02-22 | 1986-08-05 | Francoeur Ronald A | Method and apparatus for retensioning prestressed concrete members |
| CN2782763Y (en) * | 2005-04-08 | 2006-05-24 | 王伟明 | Pretensioned type steel strand prestressed concrete pipe pile |
| CN101054800A (en) * | 2007-05-11 | 2007-10-17 | 上海中技桩业发展有限公司 | Prestress high intensity concrete square pile and its production method and moulding die |
| CN201660883U (en) * | 2010-06-12 | 2010-12-01 | 江苏建华管桩有限公司 | End plate for uplift pile foundation |
| CN202323715U (en) * | 2011-11-30 | 2012-07-11 | 成都市市政工程（集团）有限责任公司 | Porous steel strand end anchoring device |
| CN102995635A (en) * | 2012-12-17 | 2013-03-27 | 青岛昊河水泥制品有限责任公司 | Prestressed concrete square pile and manufacturing method thereof |
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