CN203821377U - 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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- CN203821377U CN203821377U CN201420047253.XU CN201420047253U CN203821377U CN 203821377 U CN203821377 U CN 203821377U CN 201420047253 U CN201420047253 U CN 201420047253U CN 203821377 U CN203821377 U CN 203821377U
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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 with the steel strands comprises a hollow concrete pile body (1) and a reinforcement cage which is arranged inside the hollow concrete pile body (1), wherein the reinforcement cage comprises prestress main reinforcements which are arranged axially and reinforcement stirrups (4) which are arranged outside the main reinforcements in a surrounding mode. The pre-tensioning method centrifugal concrete pile with the steel strand is characterized in that the prestress main reinforcements are the steel strands (3); the steel strands (3) at the reinforcement cage at least one end are tightly combined with a squeezing type anchorage device (5); a connecting sleeve (8) sleeves the periphery of the squeezing type anchorage device (5); the connecting sleeve (8) is provided with a step through hole (81); the squeezing type anchorage device (5) is arranged inside a large hole portion of the step through hole (81); the steel strands (3) penetrate a small hole portion of the step through hole (81). According to the pre-tensioning method centrifugal concrete pile with the steel strands, during the manufacturing process of the pile body, the steel strands which is combined with the squeezing type anchorage device, a tensioning plate and an anchor plate are fixed together due to threaded connection through the connecting sleeve, the steel strands serving as the main reinforcements in the reinforcement cage are tensioned and applied, the anti-bending performance, the shear resistant performance and the tensile performance of the steel strands are greatly improved, and end plates can be freely installed according to actual requirements.
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, during 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 stretching, must adopt the technology of rod iron heading, the hot upsetting of rod iron 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, during stretch-draw, cannot fully contact with end plate meanwhile, cause end plate local failure; Rod iron, because cutting accuracy is controlled not, 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 technical performances such as the bending resistance of the centrifugal concrete pile of steel bar for prestressed concrete, shearing resistance obviously not enough.In engineering application, because earthquake, typhoon and other uncertain factors can cause top, buildings pile basis, produce larger moment of flexure and horizontal force, road and bridge or railway bridge also can produce because of the dynamic load of haulage vehicle larger moment of flexure and horizontal force.When above-mentioned traditional centrifugal concrete pile is used for above-mentioned engineering, often because bending resistance and shear behavior are not enough, cannot use, what in highrise building, show is especially serious.In addition,, in the engineerings 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 be separated, and end plate is mainly the effect of playing pile extension, in construction in the situation that 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; Do not needing in the single pile body piling situation of 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 in building site, to drill through a stake hole, 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, as solution cavity or cavity, more will cause a large amount of concrete wastes in addition; 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, China enterprise 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 the pipe pile reinforcing bar cage > > that is furnished with steel strand as a patent No. be ZL201220538453.6 (notification number is CN202865836U) mono-kind of Chinese utility model patent < < has disclosed, 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 control stretch-draw with the low tensile strength of rod iron, the high-tensile performance performance of steel strand is not out, therefore in this patent, steel strand are equal to rod iron role, and the due high-tensile performance of unrealized steel strand, as using the tensile strength of steel strand as control criterion, at the same time during 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 yet, 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, according to the accompanying drawing of the technical scheme of its description and this patent application, show, 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, by the technical scheme of its disclosure, cannot produce, even if produced also and cannot be practically applicable to pile foundation engineering at all, this patent has only proposed steel strand to apply to the recapitulative technical though of pre-tensioning system centrifugal concrete pile theoretically, but cannot be applied in reality production and construction.
As seen from the above, a large amount of main muscle that use are rod iron in the market prestressed centrifugally concrete pile and bored pile all can not meet the needs of current pile foundation engineering, and adopt steel strand, as the pre-tensioning system centrifugal concrete pile of main muscle, be only also a kind of technical though at present, because steel strand system is 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, fixing and how steel strand being carried out to stretch-draw is to realize the key of manufacturing the pre-tensioning system centrifugal concrete pile with steel strand, even to this day, there is no the appearance with the centrifugal concrete pile that main muscle that building practical is worth is steel strand both at home and abroad.
Utility model content
Technical problem to be solved in the utility model is the pre-tensioning system centrifugal concrete pile with steel strand providing for above-mentioned the deficiencies in the prior art, it overcomes the be connected and fixed problem of steel strand in pre-tensioning system centrifugal concrete pile, make the main muscle of pre-tensioning system 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, 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, the concrete pile body that comprises 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 Extruded anchoring tool by fashion of extrusion, described Extruded anchoring tool periphery is arranged with branch sleeve, this branch sleeve has ladder hole, described Extruded anchoring tool is positioned at the macropore portion of ladder hole, described steel strand pass the aperture portion of ladder hole, described branch sleeve be provided with connection screw thread.
The steel strand at above-mentioned reinforcing cage two ends are tightly combined with Extruded anchoring tool by fashion of extrusion, and the two ends of steel strand all can be connected and realize stretch-draw with stretch board, anchor plate by Extruded anchoring tool and branch sleeve like this, certainly, the steel strand that can be also only reinforcing cage one end are connected and realize stretch-draw with stretch board or anchor plate with Extruded anchoring tool knot merga pass Extruded anchoring tool and branch sleeve, the steel strand of the other end are not combined with Extruded anchoring tool, 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 end of above-mentioned branch sleeve 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, branch sleeve does not expose outside pile body yet, do not affect pile extension or piling, if end plate is installed certainly, even if the outer end of branch sleeve 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 branch sleeve of pile body end face also feasible.
Above-mentioned connection can be for being arranged on the internal thread on the ladder hole macropore portion inner hole wall of branch sleeve with screw thread.
The end face of above-mentioned concrete pile body is provided with end plate, near on the end plate of branch sleeve, have the connection counterbore that number is identical with steel strand radical, connect counterbore and steel strand corresponding setting one by one, each connects and 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, bar portion is threaded through being connected with screw thread on the branch sleeve connecting after the aperture portion of counterbore with steel strand end, the bar portion of described threaded connector is provided with external screw thread, after the aperture portion of bar portion through connection counterbore, be threaded with the internal thread of described branch sleeve.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 or piling by end plate.
Above-mentioned connection also can form the post portion that is threaded for being arranged on one section of external screw thread of the outer end periphery wall of branch sleeve with screw thread, on the end face of described concrete pile body near Extruded anchoring tool, have a plurality of inner fovea parts, post portion is threaded described in having one in each inner fovea part.
The end face of above-mentioned concrete pile body is provided with end plate, near on the end plate of branch sleeve, have the connection counterbore that number is identical with steel strand radical, connect counterbore and steel strand corresponding setting one by one, each connects and 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, bar portion is threaded through being connected with screw thread on the branch sleeve connecting after the aperture portion of counterbore with steel strand end, the bar portion of described threaded connector has screwed hole, after the aperture portion of bar portion through connection counterbore, enter in inner fovea part and screwed hole is threaded togather with the post portion that is threaded.This threaded connector is actual is abnormity nut.It is to be provided with the concrete pile body end plates of end plate and the another kind of 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 or piling by end plate.
The head of above-mentioned threaded connector is regular hexagon head.Convenient employing as Wrench rotation threaded connector.
The outer peripheral face of above-mentioned branch sleeve the inner is provided with one or more jacks that insert for instrument.Jack is set and facilitates branch sleeve to be connected with stretch board or anchor plate, during 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 branch sleeve rotation.
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 Extruded anchoring tool by fashion of extrusion, it is firm that Extruded anchoring tool is connected with steel strand, Extruded anchoring tool is when doing pulling experiment, even if steel strand are broken, Extruded anchoring tool can slippage yet, Extruded anchoring tool is positioned at the macropore portion of the ladder hole of branch sleeve in addition, steel strand are through the aperture portion of ladder hole, therefore can be by being set in the branch sleeve with screw thread with connection of Extruded anchoring tool outside in concrete pile manufacturing process, in connection with there being the steel strand of Extruded anchoring tool to be threaded and to be fixed together with stretch board or end plate, certainly connect and also can be set directly on Extruded anchoring tool and Extrusion anchor ground tackle is directly connected with stretch board or end plate with screw thread, but because adopting converted steel material, makes Extruded anchoring tool, and profile is less, be inconvenient to mold connection screw thread, branch sleeve can adopt the relatively soft material of material to make, and processing connects with screw thread more convenient on branch sleeve, in addition, as connecting thread is directly set on Extruded anchoring tool, when Extruded anchoring tool and steel strand are pushed, connection can be subject to damage or distortion to a certain extent with screw thread, so, sheathedly with connecting, with the branch sleeve of screw thread, steel strand are connected and fixed Extruded anchoring tool is outside, there is obvious advantage.After branch sleeve and stretch board are connected and fixed, at one end by the stretch-draw to stretch board, realization is carried out stretch-draw to the steel strand as main muscle in reinforcing cage, then carry out centrifugal forming, steam-cured, after completing, moulding unloads stretch board, anchor plate, on pile body, retain and have the branch sleeve fixing with concrete pile body, can be as required at the end-face helical connection end plate of pile body, with threaded connector, the branch sleeve 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, pratical and feasible and cost is low, make steel strand apply to the real value that centrifugal concrete pile was achieved and had 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.
Accompanying drawing explanation
Fig. 1 is the structural representation that first embodiment of the utility model is unkitted end plate;
Fig. 2 is the A place enlarged drawing of Fig. 1;
Fig. 3 is the lateral view that first embodiment of the utility model is unkitted end plate;
Fig. 4 is that first embodiment of the utility model is equipped with the structural representation after end plate;
Fig. 5 is the B place enlarged drawing of Fig. 4;
Fig. 6 is that first embodiment of the utility model is equipped with the lateral view after end plate;
Fig. 7 is the structural representation that second embodiment of the utility model is unkitted end plate;
Fig. 8 is the C place enlarged drawing of Fig. 7;
Fig. 9 is the lateral view that second embodiment of the utility model is unkitted end plate;
Figure 10 is that second embodiment of the utility model is equipped with the structural representation after end plate;
Figure 11 is the D place enlarged drawing of Figure 10;
Figure 12 is that second embodiment of the utility model is equipped with the lateral view after end plate;
Figure 13 is that the E-E of Figure 10 is to sectional view;
Figure 14 is that Extruded anchoring tool is attached to the operating principle schematic diagram on steel strand.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
As shown in Fig. 1～6,14, be first 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 outside main muscle 4 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 work mode 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 tightly combined with Extruded anchoring tool 5 by fashion of extrusion, as shown in figure 14, Extruded anchoring tool 5 generally comprises steel extruded sleeve 7, and the hard metal that is positioned over steel extruded sleeve 7 inside increases the cover 71 that rubs, hard metal increases the cover 71 that rubs and can be made into open type or opposite opened, its surfaces externally and internally is all shaped with screw thread, by hydraulic jack, by being sleeved on from the inside to the outside hard metal on steel strand 3, increasing rub cover 71 and steel extruded sleeve 7 and pressed from extrusion die 72, hard metal is increased rub cover 71 and steel extruded sleeve 7 to combine with steel strand 3 are firm.
Extruded anchoring tool 5 peripheries are arranged with branch sleeve 8, this branch sleeve 8 has ladder hole 81, Extruded anchoring tool 5 is positioned at the macropore portion of ladder hole 81 and is shelved on the macropore portion bottom surface of ladder hole 81,3 of steel strand are through the aperture portions of ladder hole 81, branch sleeve 8 be provided with connection screw thread.The outer end of branch sleeve 8 flushes with the outer face of concrete pile body 1 or is lower slightly to avoid protruding from the outer face of concrete pile body 1.
The outer peripheral face of branch sleeve 8 the inners is provided with one or more jacks 84 that insert for instrument.Jack is set and facilitates branch sleeve to be connected with stretch board or anchor plate, during 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 branch sleeve rotation.
Near on the end plate 2 of branch sleeve 8, have the connection counterbore 21 that number is identical with steel strand 3 radicals, connect counterbore 21 and steel strand 3 corresponding setting one by one, each connects and in counterbore 21, is equipped with a threaded connector 6, this threaded connector 6 has head 61 and bar portion 62, wherein head 61 is sunken in the macropore portion that connects counterbore 21, and bar portion 62 is threaded through being connected with screw thread on the branch sleeve 8 connecting after the aperture portion of counterbore 21 with steel strand 3 ends.The head 61 of threaded connector 6 is regular hexagon head.
Connection in the present embodiment is the internal thread 82 being arranged on the ladder hole macropore portion inner hole wall of branch sleeve 8 with screw thread.The bar portion 62 of threaded connector 6 is provided with external screw thread, after the aperture portion of bar portion 62 through connection counterbore 21, is threaded with internal thread 82.
Owing to being threaded connection between concrete pile end plate and pile body, part 6 is dismountable to be connected, and during construction is used, while not needing pile extension if a pile only need be made a call in each position, in producing, can not need to install end plate at the two ends of concrete pile body; 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.
As shown in Fig. 7～13, be second embodiment of the present utility model.
The difference of the present embodiment and first embodiment is: being connected with screw thread is that the one section of external screw thread that is arranged on branch sleeve 8 outer end periphery walls forms the portion 83 that is threaded, on the end face of concrete pile body 1 near Extruded anchoring tool 5, there are a plurality of inner fovea parts 11, in each inner fovea part 11, there is the post portion 83 that is threaded, the bar portion 62 of threaded connector 6 has screwed hole 63, after the aperture portion of bar portion 62 through connection counterbore 21, enters in inner fovea part 11 and screwed hole 63 is threaded togather with the post portion 83 that is threaded.
The body of rod that the centrifugal concrete pile with steel strand 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 is used, 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), branch sleeve 8 is gone here and there on steel strand, steel strand 8 and Extruded anchoring tool 5 are squeezed into one, adapter sleeve jacket casing 8 is located to Extruded anchoring tool 5 peripheries, Extruded anchoring tool 5 is positioned at the macropore portion of ladder hole 81 and is shelved on the macropore portion bottom surface of ladder hole again;
(3), make reinforcing cage;
(4), the branch sleeve of reinforcing cage one end 8 being threaded connection to part 6 is fixed together with stretch board, the other end branch sleeve of reinforcing cage is threaded connection part and anchor plate is fixed together, or, the other end steel strand of reinforcing cage do not have branch sleeve, steel strand adopt alternate manner to connect, fix, for example adopt fixedly steel strand of above-mentioned strand tapered anchorage, should be placed in female die with the reinforcing cage of stretch board, stretch board is arranged in the die cavity of female die, the outer face laminating of anchor plate and female die;
(5), to female die feeding, upper mold section closes;
(6), 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;
(7), centrifugal forming;
(8), stream curing;
(9), form removal, remove the threaded connector on stretch board and anchor plate, pile body manufacture completes;
(10), according to construction, need to threaded connector 6, fixed charge method end plates be installed in the one or both ends of pile body, also can need to not be used in end plate is installed on pile body according to construction.
Claims (10)
1. a pre-tensioning system centrifugal concrete pile with steel strand, the concrete pile body (1) that comprises 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 Extruded anchoring tool (5) by fashion of extrusion, described Extruded anchoring tool (5) periphery is arranged with branch sleeve (8), this branch sleeve (8) has ladder hole (81), described Extruded anchoring tool (5) is positioned at the macropore portion of ladder hole (81), described steel strand (3) pass the aperture portion of ladder hole (81), described branch sleeve (8) be provided with connection screw thread.
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 tightly combined with described Extruded anchoring tool (5) by fashion of extrusion.
3. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 1, is characterized in that: the outer end of described branch sleeve (8) flushes with the outer face of described concrete pile body (1) or be lower slightly.
4. according to the arbitrary described pre-tensioning system centrifugal concrete pile with steel strand of claim 1～3, it is characterized in that: described connection is the internal thread (82) being arranged on the ladder hole macropore portion inner hole wall of branch sleeve (8) with screw thread.
5. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 4, it is characterized in that: the end face of described concrete pile body (1) is provided with end plate (2), near on the end plate (2) of branch sleeve (8), have 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 connects and in counterbore (21), is equipped with a threaded connector (6), this threaded connector (6) has head (61) and bar portion (62), wherein head (61) is sunken in the macropore portion that connects counterbore (21), the bar portion (62) of described threaded connector (6) is provided with external screw thread, after the aperture portion of bar portion (62) through connection counterbore (21), be threaded with described internal thread (82).
6. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 5, is characterized in that: the head (61) of described threaded connector (6) is regular hexagon head.
7. according to the arbitrary described pre-tensioning system centrifugal concrete pile with steel strand of claim 1～3, it is characterized in that: described connection forms for being arranged on one section of external screw thread of the outer end periphery wall of branch sleeve (8) the post portion (83) that is threaded with screw thread, described concrete pile body (1) is near having a plurality of inner fovea parts (11) on the end face of Extruded anchoring tool (5), and post portion (83) is threaded described in having one in each inner fovea part (11).
8. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 7, it is characterized in that: the end face of described concrete pile body (1) is provided with end plate (2), near on the end plate (2) of branch sleeve (8), have 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 connects and in counterbore (21), is equipped with a threaded connector (6), this threaded connector (6) has head (61) and bar portion (62), wherein head (61) is sunken in the macropore portion that connects counterbore (21), the bar portion (62) of described threaded connector (6) has screwed hole (63), after the aperture portion of bar portion (62) through connection counterbore (21), enter in inner fovea part (11) and screwed hole (63) is threaded togather with the post portion (83) that is threaded.
9. the pre-tensioning system centrifugal concrete pile with steel strand according to claim 8, is characterized in that: the head (61) of described threaded connector (6) is regular hexagon head.
10. 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 branch sleeve (8) is provided with the jack (84) inserting for instrument.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420047253.XU CN203821377U (en) | 2014-01-24 | 2014-01-24 | Pre-tensioning method centrifugal concrete pile with steel strands |
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| CN201420047253.XU CN203821377U (en) | 2014-01-24 | 2014-01-24 | Pre-tensioning method centrifugal concrete pile with steel strands |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758119A (en) * | 2014-01-24 | 2014-04-30 | 俞向阳 | Pre-tensioning-mode centrifugal concrete pile with steel strands and manufacturing method |
| CN104389306A (en) * | 2014-11-03 | 2015-03-04 | 威海齐德新型建材有限公司 | Low-prestress prefabricated concrete solid pile |
| CN105128154A (en) * | 2015-09-17 | 2015-12-09 | 崔景宽 | Thread-connection post-anchoring construction method and machining equipment |
-
2014
- 2014-01-24 CN CN201420047253.XU patent/CN203821377U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758119A (en) * | 2014-01-24 | 2014-04-30 | 俞向阳 | Pre-tensioning-mode centrifugal concrete pile with steel strands and manufacturing method |
| CN104389306A (en) * | 2014-11-03 | 2015-03-04 | 威海齐德新型建材有限公司 | Low-prestress prefabricated concrete solid pile |
| CN104389306B (en) * | 2014-11-03 | 2016-04-20 | 威海齐德新型建材有限公司 | The stake of lower-prestressed prefabricated concrete solid |
| CN105128154A (en) * | 2015-09-17 | 2015-12-09 | 崔景宽 | Thread-connection post-anchoring construction method and machining equipment |
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