CN206796169U - Concavo-convex prefabricated pile die - Google Patents
Concavo-convex prefabricated pile die Download PDFInfo
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- CN206796169U CN206796169U CN201720518916.5U CN201720518916U CN206796169U CN 206796169 U CN206796169 U CN 206796169U CN 201720518916 U CN201720518916 U CN 201720518916U CN 206796169 U CN206796169 U CN 206796169U
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Abstract
The utility model belongs to prefabricated pile Mold Making technical field, is related to a kind of concavo-convex prefabricated pile die.It includes external mold and moulding mould, external mold includes upper die and lower die, horizontal bar and longitudinal rib are respectively equipped with the outer wall of upper die and lower die, horizontal bar intersects and is fixedly connected with longitudinal rib, axial restraint of the oral area of upper mould along upper mould has two upper shutterings being parallel to each other, axial restraint of the oral area of lower mould along lower mould has two lower shutterings being parallel to each other, when upper die and lower die matched moulds, upper shuttering is locked with lower shuttering position correspondence and with matched moulds locking mechanism, moulding mould includes the concave-convex mould board being separately fixed on upper die and lower die inwall, and the concave-convex mould board on upper mould is corresponding with the position of the concave-convex mould board on lower mould.The utility model is easy to make, good sealing effect, and the concavo-convex stake of high intensity can be made.
Description
Technical field
The utility model belongs to prefabricated pile Mold Making technical field, is related to a kind of concavo-convex prefabricated pile die.
Background technology
Concavo-convex prefabricated pile is also variable cross-section prefabricated pile.The cross sectional dimensions and shape edge for referring to pile body are turned round axially and changed
Stake.Non-uniform pile has preferable resistance to plucking and load because their respective structural forms and ordinary straight body stake are different
Can, increasingly favored by construction industry.
Concavo-convex prefabricated pile is made, it is necessary to use special mould, can just produce concavo-convex stake.Tool, as Chinese patent discloses
A kind of ring pile die [application number：CN201610082326.2], including external mold and internal model, external mold include bottom template, side
Template and the tie-strut for being arranged on side template top, fixed support slot is provided with outside internal model or is connected with holding nut, side
Screw rod mounting hole is provided with template, internal model is fixed on inside external mold by screw rod or support bar, internal model is at least 2 sections, interior
Mould includes internal model slubbing and internal model details, internal model slubbing and internal model details cross arrangement.Above-mentioned bamboo joint pile mold design is into interior
Mould and outer die combination, and internal model is fixed in external mold by support bar and screw rod, can realize the function of changing different internal models,
Meet bamboo joint pile production requirement of different shapes；By between external mold side template and L-shaped turnover panel installation and adjustment plate can realize
Exterior sheathing size adjusting, meet the manufacture requirement of different dimensions pile tubes, avoid overlapping investment.
But the program is complicated, complex manufacturing technology, effective sealing can not be realized between internal model and external mold,
Concrete slurry is easily flowed out in the gap between internal model and external mold in concavo-convex prefabricated pile manufacturing process, is led to not effectively more
Change or adjust.Inner template internal model slubbing also can not be sealed effectively with internal model details due to being that activity is adjustable, therefore, use the party
The mould of method easily forms useless stake in actual use process.On the other hand, the production process of bamboo joint pile has corresponding dimensional standard, nothing
The shape of bamboo joint pile need to be changed.It is improved on the concavo-convex prefabricated pile mold foundation that the application applies in early stage, designs making
Simply, concavo-convex prefabricated pile die that is easy to use, avoiding spillage.
Utility model content
The purpose of this utility model is in view of the above-mentioned problems, providing a kind of concavo-convex prefabricated pile die.
To reach above-mentioned purpose, the utility model employs following technical proposal：A kind of concavo-convex prefabricated pile die, including it is outer
Mould and moulding mould, described external mold include upper die and lower die, and head plate is located at the both ends of upper die and lower die, upper die and lower die it is outer
Horizontal bar and longitudinal rib are respectively equipped with wall, horizontal bar intersects and is fixedly connected with longitudinal rib, the oral area of described upper mould
There are two upper shutterings being parallel to each other along the axial restraint of upper mould, the axial restraint of the oral area of lower mould along lower mould there are two mutually
Parallel lower shuttering, when upper die and lower die matched moulds, upper shuttering and lower shuttering position correspondence and with matched moulds locking mechanism
Locking, described moulding mould includes the concave-convex mould board being separately fixed on upper die and lower die inwall, and the bumps on upper mould are made
Template is corresponding with the position of the concave-convex mould board on lower mould.
In above-mentioned concavo-convex prefabricated pile die, described concave-convex mould board is formed in one, and has on concave-convex mould board
The curved raised plate in cross section and depression plate, and raised plate and depression plate are arranged at intervals, the junction of raised plate and depression plate
Using the acclive guide plate transition of tool.
In above-mentioned concavo-convex prefabricated pile die, some spaced bumps are fixed with described upper die and lower die and are made
Template, described concave-convex mould board are fixed on upper die and lower die by welding or being spirally connected.
In above-mentioned concavo-convex prefabricated pile die, described concave-convex mould board is welded on upper die and lower die so as to form two
Mode structure, smooth solder side is formed after weld polishing.
In above-mentioned concavo-convex prefabricated pile die, described concave-convex mould board is made by metallic plate, is rolled into by veneer reeling machine
Outer wall is with being in the shape of arc line shaped, periphery with flange.
In above-mentioned concavo-convex prefabricated pile die, described concave-convex mould board, to form outer wall by suppressing or casting and have
There is the shape of flange in arc line shaped, periphery, on upper mould and/or lower mould at least two pieces of concave-convex mould boards along upper mould and/or under
Being provided at circumferentially spaced for mould makes to form rib forming cavity between two pieces of adjacent concave-convex mould boards.
In above-mentioned concavo-convex prefabricated pile die, flange outer wall and upper die and lower die on described concave-convex mould board it is interior
Wall is bonded, and flange is fixed on upper die and lower die by welding or being spirally connected.
In above-mentioned concavo-convex prefabricated pile die, some running wheels, upper die and lower die are fixed with the outer wall of upper die and lower die
On running wheel position it is corresponding, when upper die and lower die matched moulds, the race of circle is formed after the docking of running wheel on upper die and lower die
Wheel construction, and one end of external mold is also bolted with tensioning and fixes top plate.
In above-mentioned concavo-convex prefabricated pile die, described upper shuttering outer wall is provided with axially arranged along upper shuttering
Recess or protuberance, lower shuttering outer wall are provided with along lower shuttering axially arranged protuberance or recess, on cope plate
Recess or protuberance protrudes above portion with lower template or recess position is corresponding and shape, size match.
In above-mentioned concavo-convex prefabricated pile die, described matched moulds locking mechanism includes locker, described locker energy
Shuttering and lower shuttering is set to compress and form the fixation that is spirally connected.
In above-mentioned concavo-convex prefabricated pile die, described matched moulds locking mechanism includes tie down screw, described locking screw
Boom end has conical head, and tie down screw is screwed onto on lower shuttering, and upper shuttering is provided with the taper corresponding with conical head
Hole.
Compared with prior art, the utility model has the advantage of：It is easy to make, good sealing effect, it can be made high-strength
The concavo-convex stake of degree.
Brief description of the drawings
Fig. 1 is the structural representation of mould；
Fig. 2 is the structural representation of upper mould；
Fig. 3 is another structural representation of mould；
Fig. 4 is the structural representation of concave-convex mould board；
Fig. 5 is another structural representation of concave-convex mould board；
Fig. 6 is the structural representation in Fig. 1 another direction；
Fig. 7 is the structural representation in Fig. 3 another direction；
Schematic diagram when Fig. 8 is upper shuttering and lower shuttering matched moulds；
Another schematic diagram when Fig. 9 is upper shuttering and lower shuttering matched moulds；
Figure 10 is the structural representation of matched moulds locking mechanism；
Figure 11 is another structural representation of matched moulds locking mechanism.
In figure：Upper mould 1, lower mould 2, concave-convex mould board 3, raised plate 4, depression plate 5, guide plate 6, flange 7, rib forming cavity
8th, running wheel 9, upper shuttering 11, lower shuttering 12, recess 14, protuberance 15, locker 19, horizontal bar 16, longitudinal rib 17, conjunction
Top plate 23, head plate 24 are fixed in mold lock locking structure 18, locker 19, tie down screw 20, conical head 21, bellmouth 22, tensioning.
Embodiment
The utility model is described in more detail with reference to the accompanying drawings and detailed description.
Embodiment 1
As shown in Fig. 1-3 and Fig. 6, a kind of concavo-convex prefabricated pile die, including external mold and moulding mould, described external mold include upper
Some horizontal bars 16 and longitudinal rib 17 are respectively equipped with the outer wall of mould 1 and lower mould 2, upper mould 1 and lower mould 2, horizontal bar 16 is with indulging
Intersect and be fixedly connected to muscle 17, wherein, horizontal bar 16 is consistent with the outer wall shape of upper mould 1 and lower mould 2, longitudinal rib 17
Circumferential arranged in parallel along upper mould 1 and lower mould 2 for linear, horizontal bar 16 and longitudinal rib 17 are preferably orthogonal connection.Longitudinal direction
The setting of muscle can prevent the deformation of mold sections shape；The setting of horizontal bar can prevent the deformation of mould in the axial direction, horizontal
Set to muscle 16 and the quantity of longitudinal rib 17 and distributing position according to the size of concavo-convex prefabricated pile.
Mould head plate 24, it act as having prevented that die face deforms during external force effect.Specifically, head plate 24
In the both ends of upper mould 1 and lower mould 2.
Axial restraint of the oral area of upper mould 1 along upper mould 1 has two upper shutterings 11 being parallel to each other, the oral area edge of lower mould 2
The axial restraint of lower mould 2 has two lower shutterings 12 being parallel to each other, when upper die and lower die matched moulds, upper shuttering 11 and lower conjunction
The position correspondence of template 12 is simultaneously locked with matched moulds locking mechanism 18, and moulding mould includes being separately fixed on mould 1 and the lower inwall of mould 2
Concave-convex mould board 3, and the concave-convex mould board 3 on upper mould 1 is corresponding with the position of the concave-convex mould board 3 on lower mould 2.
With reference to shown in Fig. 7, matched moulds locking mechanism 18 can be the structure for including locker 19, and locker 19 can make matched moulds
Plate 11 and lower shuttering 12 compress and form the fixation that is spirally connected.
With reference to shown in Figure 10 and 11, matched moulds locking mechanism 18 can be the structure for including tie down screw 20, tie down screw 20
There can be two kinds of organization plans, as shown in Figure 10, the end of tie down screw 20 has conical head 21, and tie down screw 20 is screwed onto lower conjunction
In template 12, upper shuttering 11 is provided with the bellmouth 22 corresponding with conical head 21, and conical head 21 is cone type, works as rotation
It the more can bore the more tight during tie down screw 20, so as to reach the effect that upper and lower mould is fully locked.As shown in figure 11, tie down screw 20
It can axially be screwed onto on shuttering 11, bellmouth 12 is set on lower shuttering 12, by controlling drilling rod to rotate, makes drilling rod edge
Bellmouth 12 is flexible, reaches the effect of upper and lower mould matched moulds or separation.
The concave-convex mould board 3 of the present embodiment is formed in one, and has the curved raised plate in cross section on concave-convex mould board 3
4 and depression plate 5, during fixed concave-convex mould board 3, the position of raised plate 4 and depression plate 5 on upper mould 1 and lower mould 2 corresponds,
Form tubular structure.Fixed form can be welding, be spirally connected or be bonded.Raised plate 4 and depression plate 5 are arranged at intervals, raised plate 4
Made with the length of depression plate 5 according to the standard of prefabricated pile, the junction of raised plate 4 and depression plate 5, which uses, has acclive lead
To the transition of plate 6, the gradient of guide plate 6 is preferably 45 °.
The preparation method of concave-convex mould board 3 is that metallic plate such as galvanized sheet, steel plate, iron plate, aluminium alloy plate are passed through into press pressure
Type is made, forms raised plate 4 and depression plate 5, so as to make to obtain the concave-convex mould board 3 at concavo-convex interval.Roll bending can also be passed through
Machine is processed, and processing is in the concave-convex mould board 3 with raised plate 4 and the plate 5 that is recessed.
For the processing method of concave-convex mould board 3, the present embodiment does not limit.Those skilled in the art it will also be understood that
Metallic plate can also be substituted for the carbon fiber board of high intensity or the sheet material of other materials, and such replacement belongs to equivalent substitution.
Because concave-convex mould board 3 is integral type structure, thus it is easy to connect with upper mould 1 and lower mould 2.
In conjunction with shown in Fig. 2 and Fig. 6, being fixed with some running wheels 9 on the outer wall of upper mould 1 and lower mould 2, running wheel 9 is along the upper He of mould 1
Lower mould 2 it is circumferentially disposed, running wheel is preferably in semi-circular shape, and the position of upper mould 1 and the running wheel 9 on lower mould 2 is corresponding, when upper mould and
During lower mould matched moulds, running wheel 9 on upper mould 1 and lower mould 2 forms the running wheel structure of circle after docking, and one end of external mold be also spirally connected/
It is welded with tensioning and fixes top plate 23.Tensioning fixed plate is inessential part, and it act as ensuring that mould is indeformable, prevents mould from sealing
Head plate is not easy damage of colliding with.
Preferred scheme, as shown in fig. 6, axial restraint of the oral area of upper mould 1 along upper mould 1 has two upper matched moulds being parallel to each other
Plate 11, the axial restraint of the oral area of lower mould 2 along lower mould 2 has two lower shutterings 12 being parallel to each other, when upper die and lower die matched moulds
When, upper shuttering 11 and the lower position correspondence of shuttering 12 are simultaneously fixedly connected with locker 19, and locker 19 can be mold closing screw.
Mold closing screw is prior art, and here is omitted.
Upper shuttering 11 and lower shuttering 12 can be fixed on upper mould 1 and lower mould 2 by welding or being spirally connected.
In conjunction with shown in Fig. 8 and Fig. 9, the upper outer wall of shuttering 11 is provided with along the axially arranged recess 14 of upper shuttering 11
Or protuberance 15, the lower outer wall of shuttering 12 are provided with along lower shuttering 12 axially arranged protuberance 15 or recess 14, upper conjunction
Recess 14 or protuberance 15 in template 11 and lower shuttering 12 protrude above portion 15 or the position of recess 14 is corresponding and shape,
Size matches.Upper shuttering 11 and lower shuttering 12 can form lenticular concave convex button by recess 14 and protuberance 15
Close, on the one hand can be easy to position alignment during upper and lower mould matched moulds, on the other hand, the form that bumps fasten can effectively prevent from making
Concrete slurry is spilt at matched moulds during stake, and it is close to be further put into epoxy resin or sealing strip etc. in jog junction
Closure material, it can further improve the sealing after matched moulds.
Embodiment 2
The present embodiment and the structure of embodiment 1 are essentially identical, and difference is, as shown in figure 3, on upper mould 1 and lower mould 2
It is fixed with some spaced concave-convex mould boards 3, the spacing is described according to the jog size relative set of concavo-convex prefabricated pile
Concave-convex mould board 3 be fixed on by the mode such as weld or be spirally connected or be bonded on upper mould 1 and lower mould 2.
It will be appreciated by those skilled in the art that forming neutral between two pieces of axially adjacent concave-convex mould boards 3, the neutral exists
The corresponding protuberance of prefabricated pile is formed when making prefabricated pile.
When concave-convex mould board 3 is welded on upper mould 1 and lower mould 2, smooth solder side is formed after weld polishing.Such as weldering
Connection technology is high, be able to can also not have to polish using the fixed mode such as being spirally connected or be bonded without polishing.
With reference to shown in Fig. 4 and Fig. 5, concave-convex mould board 3 is made by metallic plate, and it is in camber line to be rolled into outer wall to have by veneer reeling machine
Shape, periphery have the shape of flange 7.
As described in Example 1, those skilled in the art can also use the sheet material of other materials to replace metallic plate.
Preferred scheme, with reference to shown in Fig. 6, the four edges of concave-convex mould board 3 have flange 7, and on upper mould 1 and/or lower mould 2
At least two pieces of concave-convex mould boards 3 along upper mould 1 and/or lower mould 2 be provided at circumferentially spaced make two pieces of adjacent concave-convex mould boards 3 it
Between form rib forming cavity 8.The intensity of mould can further be improved.Preferably, it is recessed by four pieces after upper die and lower die matched moulds
Convex mould board 3 forms four rib forming cavities 8, when making prefabricated pile, rib forming cavity 8 is presented as along the circumferentially disposed of mould
The outwardly prefabricated muscle of prefabricated pile outer wall, obtain a kind of prefabricated pile of the prefabricated muscle of high intensity band.
In the present embodiment, the cross section of concave-convex mould board 3 is semicircle or arc.When needing to be formed rib forming cavity 8,
The arc arc angle of the cross section of concave-convex mould board 3 is less than 90 °.
The outer wall of flange 7 on concave-convex mould board 3 is bonded with the inwall of upper mould 1 and lower mould 2, and flange 7 is by welding or being spirally connected
Or the mode such as bonding is fixed on mould 1 and lower mould 2.Flange 7 is bonded with upper mould 1 and lower mould 2, press can also be used to make by force
Flange is bonded with mould inner surface.
The present embodiment, concave-convex mould board 3 only need roll bending, concave-convex mould board 3 not concave-convex surface, therefore make itself
Convenient, flange is formed with mould inner wall and is brought into close contact, and is not formed spillage, the setting of rib forming cavity 8, can be obtained one kind-band
The prefabricated pile of prefabricated muscle.
Embodiment 3
The present embodiment is essentially identical with Examples 1 and 2, and difference is, moulding mould is spliced for concave-convex mould board,
Connecting method is welding, is spirally connected or bonding way.
Embodiment 4
The present embodiment is essentially identical with Examples 1 and 2, and difference is, moulding mould is integrally formed with external mold.
Embodiment 5
The present embodiment is essentially identical with Examples 1 and 2, and difference is, is not fixed on the outer wall of upper mould 1 and lower mould 2
Running wheel 9, this concavo-convex prefabricated pile die are used for the making of solid concavo-convex prefabricated pile.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Although more used herein upper mould 1, lower mould 2, concave-convex mould board 3, raised plate 4, depression plate 5, guide plate 6,
Flange 7, rib forming cavity 8, running wheel 9, rib 10, upper shuttering 11, lower shuttering 12, locker 19, recess 14, protuberance
15 grade terms, but it is not precluded from the possibility using other terms.Using these terms just for the sake of more easily description and
Explain essence of the present utility model；Being construed as any additional limitation is disagreed with the utility model spirit
's.
Claims (10)
1. a kind of concavo-convex prefabricated pile die, including external mold and moulding mould, it is characterised in that described external mold include upper mould (1) and
Lower mould (2), head plate (24) are located at the both ends of upper die and lower die, and horizontal bar is respectively equipped with the outer wall of upper mould (1) and lower mould (2)
(16) intersect and be fixedly connected with longitudinal rib (17) with longitudinal rib (17), horizontal bar (16), the oral area of described upper mould (1)
There are two upper shutterings being parallel to each other (11) along the axial restraint of upper mould (1), the axial direction of the oral area of lower mould (2) along lower mould (2)
Two lower shutterings being parallel to each other (12) are fixed with, when upper die and lower die matched moulds, upper shuttering (11) and lower shuttering
(12) position correspondence and with matched moulds locking mechanism (18) lock, described moulding mould include be separately fixed at mould (1) and lower mould
(2) concave-convex mould board on inwall (3), and the concave-convex mould board (3) on upper mould (1) and the concave-convex mould board (3) on lower mould (2)
Position it is corresponding.
2. the prefabricated pile die of bumps according to claim 1, it is characterised in that described concave-convex mould board (3) is integrated
Shaping or connection are formed, and have the curved raised plate (4) in cross section and depression plate (5), and raised plate on concave-convex mould board (3)
(4) it is arranged at intervals with depression plate (5), the junction of raised plate (4) and depression plate (5) is using acclive guide plate (6) mistake of tool
Cross.
3. the prefabricated pile die of bumps according to claim 1, it is characterised in that solid on described upper mould (1) and lower mould (2)
Surely there are some spaced concave-convex mould boards (3), described concave-convex mould board (3) is fixed on mould (1) and lower mould (2).
4. the prefabricated pile die of bumps according to claim 3, it is characterised in that described concave-convex mould board (3) welding or
It is spirally connected or bonding way is fixed on mould (1) and lower mould (2) so as to form two mode structures.
5. the prefabricated pile die of bumps according to claim 3, it is characterised in that described concave-convex mould board (3), pass through pressure
System or casting form outer wall with being in the shape of arc line shaped, periphery with flange (7), on upper mould (1) and/or lower mould (2) at least
There are two pieces of concave-convex mould boards (3) to make two pieces of adjacent concave-convex mould boards along upper mould (1) and/or being provided at circumferentially spaced for lower mould (2)
(3) rib forming cavity (8) is formed between.
6. the prefabricated pile die of bumps according to claim 3, it is characterised in that turning on described concave-convex mould board (3)
Side (7) outer wall is bonded with the inwall of upper mould (1) and lower mould (2), and flange (7) is by welding or being spirally connected or being adhesively fixed on upper mould
(1) and on lower mould (2).
7. the prefabricated pile die of bumps according to claim 1, it is characterised in that solid on the outer wall of upper mould (1) and lower mould (2)
Surely there are some running wheels (9), upper mould (1) is corresponding with the position of the running wheel (9) on lower mould (2), when upper die and lower die matched moulds, on
The running wheel structure of circle is formed after running wheel (9) docking on mould (1) and lower mould (2), and one end of external mold is also spirally connected/is welded with and opens
Draw fixed top plate (23).
8. the prefabricated pile die of bumps according to claim 1, it is characterised in that set on described upper shuttering (11) outer wall
Have along upper shuttering (11) axially arranged recess (14) or protuberance (15), lower shuttering (12) outer wall and be provided with along lower conjunction
Template (12) axially arranged protuberance (15) or recess (14), recess (14) or protuberance on upper shuttering (11)
(15) portion (15) is protruded above with lower shuttering (12) or recess (14) position is corresponding and shape, size match.
9. the prefabricated pile die of bumps according to claim 1, it is characterised in that described matched moulds locking mechanism (18) includes
Locker (19), described locker (19) can make shuttering (11) and lower shuttering (12) compress and form the fixation that is spirally connected.
10. the prefabricated pile die of bumps according to claim 1, it is characterised in that described matched moulds locking mechanism (18) bag
Tie down screw (20) is included, described tie down screw (20) end has conical head (21), and tie down screw (20) is screwed onto lower matched moulds
On plate (12), upper shuttering (11) is provided with the bellmouth (22) corresponding with conical head (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720518916.5U CN206796169U (en) | 2017-05-11 | 2017-05-11 | Concavo-convex prefabricated pile die |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720518916.5U CN206796169U (en) | 2017-05-11 | 2017-05-11 | Concavo-convex prefabricated pile die |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108858733A (en) * | 2017-05-11 | 2018-11-23 | 周兆弟 | Concave-convex prefabricated pile die |
| CN108972869A (en) * | 2018-08-06 | 2018-12-11 | 武汉大学 | Flush type post jacking prefabricated tubular pile production mold and production method |
| CN110524686A (en) * | 2018-05-24 | 2019-12-03 | 周兆弟 | It is a kind of for forming the mold of non-uniform pile |
| CN110524713A (en) * | 2018-05-24 | 2019-12-03 | 周兆弟 | A kind of mold for formation of concrete tubular pole |
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2017
- 2017-05-11 CN CN201720518916.5U patent/CN206796169U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108858733A (en) * | 2017-05-11 | 2018-11-23 | 周兆弟 | Concave-convex prefabricated pile die |
| CN110524686A (en) * | 2018-05-24 | 2019-12-03 | 周兆弟 | It is a kind of for forming the mold of non-uniform pile |
| CN110524713A (en) * | 2018-05-24 | 2019-12-03 | 周兆弟 | A kind of mold for formation of concrete tubular pole |
| CN108972869A (en) * | 2018-08-06 | 2018-12-11 | 武汉大学 | Flush type post jacking prefabricated tubular pile production mold and production method |
| CN108972869B (en) * | 2018-08-06 | 2020-01-24 | 武汉大学 | Die and method for producing embedded type post-grouting precast tubular pile |
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