CN203821378U - Pre-tensioning method centrifugal concrete pile with steel strands - Google Patents
Pre-tensioning method centrifugal concrete pile with steel strands Download PDFInfo
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- CN203821378U CN203821378U CN201420048043.2U CN201420048043U CN203821378U CN 203821378 U CN203821378 U CN 203821378U CN 201420048043 U CN201420048043 U CN 201420048043U CN 203821378 U CN203821378 U CN 203821378U
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Abstract
The utility model relates to a pre-tensioning method centrifugal concrete pile with steel strands. The pre-tensioning method centrifugal concrete pile comprises a concrete pile body and a steel reinforcement cage which comprises pre-stressed main reinforcements and stirrups. The pre-tensioning method centrifugal concrete pile is characterized in that the pre-stressed main reinforcements are the steel strands; the steel strands which are arranged at least one end of the steel reinforcement cage are closely combined with an anchor ring which comprises stepped through holes; large hole portions of the stepped through holes are thread holes; small hole portions of the stepped through holes are taper holes; a plurality of clamping pieces are placed in every taper hole; the inner surface of every clamping piece is provided with clamping teeth; the plurality of clamping pieces are pieced to form clamping head assemblies which are used for clamping the steel strands; taper surfaces which are matched with the taper holes are formed on the peripheral surfaces of the clamping head assemblies respectively; inner tooth holes are formed in the centers of the clamping head assemblies respectively; the steel strands penetrate the inner tooth holes formed in the corresponding clamping head assemblies to be locked through the inner tooth holes respectively. According to the pre-tensioning method centrifugal concrete pile with the steel strands, the anchor ring which is combined with the end portions of the steel strands can be fixedly connected with tension plate threads in the process of manufacture of the pile body and accordingly the steel strands which serve as the main reinforcements in the steel reinforcement cage can be tensioned and applied and an end plate can be freely installed according to actual needs.
Description
Technical field
The utility model belongs to the technical field of the pile foundation engineering of all kinds of architectural structure systems, relates in particular to a kind of pre-tensioning system centrifugal concrete pile 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.In addition, the prestressed centrifugally concrete pile of existing explained hereafter, must there be end plate at pile body two ends and be fixedly connected as a single entity with pile body, can not separate, and end plate is mainly the effect of playing pile extension, in construction in the case of two of needs or above pile body pile extension, the lower surface of beneath pile body and topmost the end plate of the upper surface of pile body because need just obviously belong to unnecessary parts without pile extension; In the single pile body piling situation that does not need pile extension, the end plate at the two ends of pile body is also unnecessary substantially.So, in construction, two end plates can be wasted in each position, and the cost of every end plate is wanted 100 yuans of left and right, in architecture construction, often needing to use a large amount of centrifugal concrete piles, the cost of its waste or increase is exactly a huge numeral.
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 realization and end plate or stretch board, the firm of anchor plate fixed, 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.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of practicable pre-tensioning system centrifugal concrete pile with steel strand for above-mentioned prior art present situation, this centrifugal concrete pile makes inner main muscle adopt steel strand to become possibility, the significantly technical performance excellence such as the bending resistance of centrifugal concrete pile, shearing resistance, tension, and end plate can be installed according to actual needs.
The utility model 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 reinforcing cage of concrete pile body, reinforcing cage comprises the main muscle of axial arranged prestressing force and the 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.
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 connected with stretch board and be realized stretch-draw, anchor plate by anchor ring like this, certainly, also can be steel strand and anchor ring knot merga pass anchor ring and the stretch board of only reinforcing cage one end, 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 to 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.
As preferably, the outer face of above-mentioned anchor ring flushes with the outer face of described concrete pile body or is lower slightly.Even like this in the situation that end plate not being installed, anchor ring does not expose outside pile body end face yet, do not affect piling, if end plate is installed, even if the outer face of anchor ring slightly exposes outside pile body end face, as long as cavity is set on our end face that contacts with pile body at end plate, in order to hold, to expose the anchor ring of pile body end face also feasible.
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.
The end face of above-mentioned concrete pile body is provided with end plate, have near on the end plate of anchor ring the connection counterbore that number is identical with steel strand radical, connect counterbore and steel strand corresponding setting one by one, each connection in counterbore is equipped with a threaded connector, this threaded connector has head and bar portion, 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.
Compared with prior art, the utility model has the advantage of: 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 can will be fixed on anchor ring and the stretch board of steel strand end in concrete pile manufacturing process, anchor plate is threaded connection part and is threaded and is fixed together, connected mode is identical with end plate, then at one end by 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, anchor plate, on pile body, retain and have the anchor ring fixing with concrete pile body, can be as required at the end-face helical connection end plate of pile body, with threaded connector, the anchor ring of retaining on end plate and pile body is connected and fixed, complete the manufacture process of the centrifugal concrete pile with steel strand, 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, and, owing to being threaded connection between concrete pile end plate and pile body, part is dismountable to be connected, the quantity whether pile body two ends install end plate and installation end plate can freely arrange according to the actual needs of pile extension completely, can save so a considerable end plate expense, effectively reduce the holistic cost that building is manufactured.
Brief description of the drawings
Fig. 1 is the structural representation that the utility model embodiment is unkitted end plate;
Fig. 2 is the A place enlarged drawing of Fig. 1;
Fig. 3 is the lateral view that the utility model embodiment is unkitted end plate;
Fig. 4 is that the utility model embodiment is equipped with the structural representation after end plate;
Fig. 5 is the B place enlarged drawing of Fig. 4;
Fig. 6 is that the utility model embodiment is equipped with the lateral view after end plate;
Fig. 7 is that the C-C of Fig. 4 is to sectional view;
Fig. 8 is the perspective view of chuck component in the utility model embodiment;
Fig. 9 is the three-dimensional exploded view of chuck component in the utility model embodiment;
Figure 10 be in the utility model embodiment anchor ring partly cut open figure.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
As shown in Fig. 1～10, it is preferred embodiment of the present utility model.
A kind of pre-tensioning system centrifugal concrete pile with steel strand, comprise concrete pile body 1, the end plate 2 of hollow 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 and 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 many spaced latches 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 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.
The end face of concrete pile body 1 is provided with end plate 2, near having number and steel strand on the end plate 2 of anchor ring 5) connection counterbore 21 that radical is identical, 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.
Owing to being threaded connection between concrete pile end plate and pile body, part 8 is dismountable to be connected, and during construction is used, while not needing pile extension, in producing, can not need to install end plate at the two ends of concrete pile body if a pile only need be made a call in each position; If need to be with the above concrete pile pile extensions of two or two, the lower surface of beneath pile body and topmost the upper surface of pile body can not need to install end plate, all the other pile body end faces should be installed end plate.
The body of rod that the centrifugal concrete pile that the utility model is mentioned 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.
The manufacture method originally with the centrifugal concrete pile of steel strand comprises following steps:
(1), the customized cut-off of steel strand 3;
(2), make reinforcing cage, steel strand 3 are tightly combined with anchor ring 5 by following chuck component 7;
(3), the anchor ring of reinforcing cage one end 5 being threaded connection to part 8 is fixed together with stretch board, the other end anchor ring 5 of reinforcing cage is threaded connection part 8 and is fixed together with anchor plate, 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; 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 the stuck steel strand at chuck component center;
(6), centrifugal forming;
(7), stream curing;
(8), form removal, remove the threaded connector on stretch board and anchor plate, complete the making of pile body;
(9), need to threaded connector 8, fixed charge method end plate 2 be installed in the one or both ends of pile body according to construction, also can need to not be used in end plate is installed on pile body according to constructing.
Claims (8)
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 reinforcing cage of concrete pile body (1), reinforcing cage comprises the main muscle of axial arranged prestressing force and the 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).
2. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 1, is characterized in that: the steel strand (3) at described reinforcing cage two ends are crossed chuck component (7) and are tightly combined with described anchor ring (5).
3. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 1, is characterized in that: the outer end of described anchor ring (5) flushes with the outer face of described concrete pile body (1) or be lower slightly.
4. 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).
5. 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).
6. 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.
7. according to the arbitrary described pre-tensioning system centrifugal concrete pile with steel strand of claim 1～6, it is characterized in that: the end face of described concrete pile body (1) is provided with end plate (2), have near on the end plate (2) of anchor ring (5) the connection counterbore (21) that number is identical with steel strand (3) 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 described threaded connector (8) is provided with external screw thread, after the aperture portion of bar portion (82) through connection counterbore (21), be threaded with described screwed hole (51).
8. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 7, is characterized in that: the head (81) of described threaded connector (8) is regular hexagon head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420048043.2U CN203821378U (en) | 2014-01-24 | 2014-01-24 | Pre-tensioning method centrifugal concrete pile with steel strands |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420048043.2U CN203821378U (en) | 2014-01-24 | 2014-01-24 | Pre-tensioning method centrifugal concrete pile with steel strands |
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| Publication Number | Publication Date |
|---|---|
| CN203821378U true CN203821378U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420048043.2U Withdrawn - After Issue CN203821378U (en) | 2014-01-24 | 2014-01-24 | Pre-tensioning method centrifugal concrete pile with steel strands |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758120A (en) * | 2014-01-24 | 2014-04-30 | 俞向阳 | Pre-tensioning-mode centrifugal concrete pile with steel strands and manufacturing method |
| CN106049460A (en) * | 2016-07-19 | 2016-10-26 | 周兆弟 | Precast pile capable of using steel strands for connection and connection method |
| CN107366277A (en) * | 2016-05-13 | 2017-11-21 | 周兆弟 | A kind of post-stretching fender post and its moment connection method |
-
2014
- 2014-01-24 CN CN201420048043.2U patent/CN203821378U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758120A (en) * | 2014-01-24 | 2014-04-30 | 俞向阳 | Pre-tensioning-mode centrifugal concrete pile with steel strands and manufacturing method |
| CN103758120B (en) * | 2014-01-24 | 2016-01-06 | 俞向阳 | A kind of pre-tensioning system centrifugal concrete pile and manufacture method with steel strand |
| CN107366277A (en) * | 2016-05-13 | 2017-11-21 | 周兆弟 | A kind of post-stretching fender post and its moment connection method |
| CN106049460A (en) * | 2016-07-19 | 2016-10-26 | 周兆弟 | Precast pile capable of using steel strands for connection and connection method |
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