CN106827177A - The vibrating method of bubble removing is removed in a kind of prefabricated pipe section production - Google Patents
The vibrating method of bubble removing is removed in a kind of prefabricated pipe section production Download PDFInfo
- Publication number
- CN106827177A CN106827177A CN201710053632.8A CN201710053632A CN106827177A CN 106827177 A CN106827177 A CN 106827177A CN 201710053632 A CN201710053632 A CN 201710053632A CN 106827177 A CN106827177 A CN 106827177A
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- pipe section
- mould
- prefabricated pipe
- vibrator
- blanking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/093—Producing shaped prefabricated articles from the material by vibrating or jolting by means directly acting on the material, e.g. by cores wholly or partly immersed in the material or elements acting on the upper surface of the material
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The invention provides the vibrating method that bubble removing is removed in a kind of production of prefabricated pipe section, the artificial vibrating spear of prior arts is substituted in particular by the multiple transverse direction vibrators of increase on mould, by the cooperation of longitudinal vibrator and lateral oscillators, so that direction concrete produces relative motion with prefabricated pipe section die surface in length and breadth during concrete placings, concrete rubber cement is attached to die surface in process of vibrating, blibbing is covered by concrete rubber cement after prefabricated components shaping, so as to improve prefabricated pipe section transverse direction Forming Quality, solve the problems, such as that prefabricated pipe section transverse direction number of bubbles is excessive.The number of bubbles of the prefabricated pipe section horizontal direction using vibrating method of the invention than being molded only with the method for longitudinal vibrator reduces 93% or so.The present invention pinpoints the problems from unique angle, using oscillation crosswise source is increased, the bubble of horizontal direction is processed to vibrate mulching method, and required device is simple to manufacture, effect is significant, and less investment, it is easy to constructing operation and management, is easy to promotion and implementation.
Description
Technical field
The present invention relates to section of jurisdiction production vibrating method, particularly, it is related to a kind of prefabricated pipe section production to go vibrating for bubble removing
Method.
Background technology
With the continuous expansion of Modernized City Construction scale, subway, can used as a kind of effective vehicles
Solve the problems, such as that urban traffic pressure is excessive.Subway segment is typically made by the way of prefabricated at this stage.People are in ground iron pipe
It is a problem demanding prompt solution to find that precast concrete blibbing is eliminated in the manufacturing process of piece.People for bubble this
The preventing and treating of the common quality defect of prefabricated pipe section production carried out analysis from many aspects, for the research of concrete vibrating mode, prior art
It is that prefabricated pipe section is produced by the cooperation of longitudinal form vibrator and artificial vibration rod, to reduce precast concrete surface gas
Bubble.
But plug-in type vibrating rod is the arrangement and vibrating time vibrated a little according to the decision of the size and experience of working face, by people
Work constraint is larger, and quality is difficult to control to；Plug-in type vibrating rod vibrate the reinforcing bar that is also possible to encounter in section of jurisdiction and pre-
Tubulation die inner surface, so as to influence the quality of production and the mold use life-span of section of jurisdiction；And due to livewire work, this side
There is certain risk in formula.Additionally, artificial vibrating is unsuitable for automatic assembly line operation.
At present, industry personnel from the directions such as raw material, slump, concrete vibrating mode, water reducer studied why
Sample reduces prefabricated pipe section blibbing, but reduce be only longitudinal direction bubble, the bubble of horizontal direction or a lot.
The content of the invention
Present invention aim at the vibrating method that bubble removing is removed in a kind of prefabricated pipe section production of offer, to solve prefabricated pipe section table
The more technical problem of face transverse direction bubble.
To achieve the above object, the invention provides the vibrating method that bubble removing is removed in a kind of production of prefabricated pipe section, specifically,
Carry out according to the following steps：
(1), installed on prefabricated pipe section mould and be no less than 6 vibrators, by a longitudinal vibrator and a transverse-vibration
Dynamic device is divided into 1 group, is arranged in mould both sides and middle part；
(2), when blanking is produced, lateral oscillators are first opened, until material is lower full to mould lockhole position, the lockhole position
Put and refer specifically to be located at the most middle lockhole of mould horizontal direction side plate；
(3), stop blanking, close lateral oscillators, open longitudinal vibrator, continue lower full remaining material；
(4) the ambilateral longitudinal vibrator of mould, is closed, is retained mould middle part longitudinal vibrator and is continued to vibrate 1min.
The vibrating method of bubble removing is removed in a kind of prefabricated pipe section production, specifically, is carried out according to the following steps：
(1), installed on prefabricated pipe section mould and be no less than 6 vibrators, by a longitudinal vibrator and a transverse-vibration
Dynamic device is divided into 1 group, is arranged in mould both sides and middle part；
(2), when blanking is produced, lateral oscillators are first opened, until material is lower full to mould 1/3, stops blanking；
(3), after vibration 1min, continue at blanking to the 2/3 of mould, stop blanking；
(4), after vibration 1min, lower full remaining material is continued；
(5) lateral oscillators, are closed, longitudinal vibrator is opened, after vibration 1min, vibrator is closed.
Especially, the prefabricated pipe section mould mould steel making, by one piece of base plate, four pieces of side plates, two pieces of top boards
The specificity precast concrete mould for tunnel duct piece production of composition is connected, has injected hole in the middle of the base plate.
Especially, the clear distance between every group of two vibrators of the vibrator is 2cm, prevents two vibrators in operating
Middle collision.
Especially, the vibrator is attached on the base plate of the prefabricated pipe section mould by bolt.
Especially, the blanking velocity is 20s/m3, blanking velocity can not ether it is fast, it is not in place with without vibration；Blanking
Speed also can not ether it is slow, in order to avoid during placement layer by layer, cold seam phenomenon is produced between layers.
Further, the frequency of the vibrator is 50Hz, and the vertically and horizontally vibrator is transported by the centrifugation of vibrator
Dynamic, driven mold vibrates in direction in length and breadth respectively together.
Further, the vibrator of the vibrator group ragged edge positioned at die edge from the longitudinal side plate of mould two away from
From 20cm is, the transverse and longitudinal vibrator in the middle part of mould is located at apart from the both sides of mould injected hole 1cm respectively.
Further, the lockhole is located on the prefabricated pipe section die side plate, and bottom is 12cm with a distance from base plate.
The invention has the advantages that：
The present invention substitutes the artificial vibrating spear of prior art by increasing transverse direction vibrator so that horizontal during concrete placings
Direction concrete produces relative motion with prefabricated pipe section die surface, and concrete rubber cement is attached to die surface in process of vibrating,
Blibbing is covered by concrete rubber cement after prefabricated components shaping, so as to improve prefabricated pipe section transverse direction Forming Quality, is solved
The excessive problem of prefabricated pipe section transverse direction number of bubbles.Using vibrating method of the invention than the method only with longitudinal vibrator
The number of bubbles of the section of jurisdiction horizontal direction of shaping reduces 93% or so.The present invention pinpoints the problems from unique angle, horizontal using increasing
To vibration source, the bubble of horizontal direction is processed in the form of vibrating covering, and device is simple to manufacture needed for the inventive method, effect
Fruit is notable, and less investment, it is easy to constructing operation and management, is easy to promotion and implementation.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate, for explaining the present invention, not constitute inappropriate limitation of the present invention.
In the accompanying drawings：
Fig. 1 is prefabricated pipe section longitudinal direction side plate schematic diagram of the present invention；
Fig. 2 is prefabricated pipe section transverse direction side plate schematic diagram of the present invention；
Fig. 3 is the mounting means schematic diagram of prefabricated pipe section mold vibration device under mode of vibration of the present invention；
Fig. 4 is the mounting means schematic diagram of prefabricated pipe section mold vibration device under conventional vibration mode；
Reference：
1st, base plate, 2, longitudinal vibrator, 3, lateral oscillators, 4, injected hole, 5, lockhole, 6, side plate, 7, top board.
Specific embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be limited according to claim
Fixed and covering multitude of different ways is implemented.
Embodiment 1
Referring to Fig. 1, Fig. 2 and Fig. 3, there is provided the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production, is entered according to the following steps
OK：
(1), installed on prefabricated pipe section mould and be no less than 6 form vibrators, the prefabricated pipe section mould is to use mould
Tool steel making, the specificity produced for tunnel duct piece being made up of one piece of 1, four pieces of base plate top board 7 of side plate 6, two is mixed
Solidifying soil prefabricated-member mould, the form vibrator is led to for 1 group respectively by a longitudinal vibrator 2 and a lateral oscillators 3
Cross and be bolted to the two edges of prefabricated pipe section die bottom plate 1 and middle part, wherein, the clear distance between every group of two vibrators
It is 2cm, the vibrator of the vibrator group ragged edge positioned at die edge is with a distance from the longitudinal side plate 6 of mould two
20cm, it is the both sides of 1cm, institute that the transverse and longitudinal vibrator in the middle part of mould is located at the distance away from mould injected hole 4 respectively
The centrifugal motion that vertically and horizontally vibrator passes through vibrator is stated, driven mold vibrates in direction in length and breadth respectively together, and frequency is 50Hz,
So as to overcome the open defects such as concrete outer surface bubble, pitted skin.
(2), when blanking is produced, lateral oscillators 3 are first opened, it is 20s/m to control blanking velocity3, continue blanking to position
In the prefabricated pipe section die side plate 6, distance of the bottom away from base plate 1 is the position of lockhole 5 of 12cm, stops blanking.Blanking velocity
Can not ether it is fast, it is not in place with without vibration；Blanking velocity also can not ether it is slow, in order to avoid during placement layer by layer, produce between layers
Cold seam phenomenon.
(3) lateral oscillators 3, are closed, longitudinal vibrator 2 is opened, keeps blanking velocity constant, continue lower full remaining
Material.
(4) the ambilateral longitudinal vibrator 2 of prefabricated pipe section mould, is closed, retains the middle vibration of longitudinal vibrator 2 1min
After close.
Embodiment 2
Referring to Fig. 1, Fig. 2 and Fig. 3, there is provided the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production, is entered according to the following steps
OK：
(1), installed on prefabricated pipe section mould and be no less than 6 form vibrators, the prefabricated pipe section mould is to use mould
Tool steel making, the specificity produced for tunnel duct piece being made up of one piece of 1, four pieces of base plate top board 7 of side plate 6, two is mixed
Solidifying soil prefabricated-member mould, the form vibrator is led to for 1 group respectively by a longitudinal vibrator 2 and a lateral oscillators 3
Cross and be bolted to the two edges of prefabricated pipe section die bottom plate 1 and middle part, wherein, the clear distance between every group of two vibrators
It is 2cm, the vibrator of the vibrator group ragged edge positioned at die edge is with a distance from the longitudinal side plate 6 of mould two
20cm, it is the both sides of 1cm, institute that the transverse and longitudinal vibrator in the middle part of mould is located at the distance away from mould injected hole 4 respectively
The centrifugal motion that vertically and horizontally vibrator passes through vibrator is stated, driven mold vibrates in direction in length and breadth respectively together, and frequency is 50Hz,
So as to overcome the open defects such as concrete outer surface bubble, pitted skin.
(2), when blanking is produced, lateral oscillators 3 are first opened, it is 20s/m to control blanking velocity3, until material is lower completely extremely
At mould 1/3, stop blanking.Blanking velocity can not ether it is fast, it is not in place with without vibration；Blanking velocity also can not ether it is slow, with
When exempting from placement layer by layer, cold seam phenomenon is produced between layers.
(3), after vibration 1min, keep blanking velocity constant, continue at blanking to the 2/3 of segment die, stop blanking；
(4), after vibration 1min, keep blanking velocity constant, continue lower full remaining material；
(5) lateral oscillators 3, are closed, longitudinal vibrator 2 is opened, is closed after vibration 1min.
Embodiment 3
The embodiment is the preferred embodiment of embodiment 1.
Referring to Fig. 1, Fig. 2 and Fig. 3, there is provided the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production, is entered according to the following steps
OK：
(1), 6 form vibrators are installed on prefabricated pipe section mould, the prefabricated pipe section mould is to use mould steel
Make, the specificity concrete for tunnel duct piece production being made up of one piece of 1, four pieces of base plate top board 7 of side plate 6, two is pre-
Part forming die, the form vibrator be divided into 3 groups be bolted on the two edges of prefabricated pipe section die bottom plate 1 and in
Portion, one of longitudinal vibrator 2 and a lateral oscillators 3 are 1 group, and the clear distance between every group of two vibrators is 2cm,
The vibrator of the vibrator group ragged edge positioned at die edge is 20cm with a distance from the longitudinal side plate 6 of mould two, described
It is the both sides of 1cm that transverse and longitudinal vibrator in the middle part of mould is located at the distance away from mould injected hole 4 respectively, described vertically and horizontally to shake
Dynamic centrifugal motion of the device by vibrator, driven mold vibrates in direction in length and breadth respectively together, and frequency is 50Hz, mixed so as to overcome
The open defects such as solidifying soil outer surface bubble, pitted skin.
(2), when blanking is produced, lateral oscillators 3 are first opened, it is 20s/m to control blanking velocity3, continue blanking to position
In the prefabricated pipe section die side plate 6, distance of the bottom away from base plate 1 is the position of lockhole 5 of 12cm, stops blanking.Blanking velocity
Can not ether it is fast, it is not in place with without vibration；Blanking velocity also can not ether it is slow, in order to avoid during placement layer by layer, produce between layers
Cold seam phenomenon.
(3) lateral oscillators 3, are closed, longitudinal vibrator 2 is opened, keeps blanking velocity constant, continue lower full remaining
Material.
(4) the ambilateral longitudinal vibrator 2 of prefabricated pipe section mould, is closed, retains the middle vibration of longitudinal vibrator 2 1min
After close.
Embodiment 4
The embodiment is the preferred embodiment of embodiment 2.
Referring to Fig. 1, Fig. 2 and Fig. 3, there is provided the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production, is entered according to the following steps
OK：
(1), 6 form vibrators are installed on prefabricated pipe section mould, the prefabricated pipe section mould is to use mould steel
Make, the specificity concrete for tunnel duct piece production being made up of one piece of 1, four pieces of base plate top board 7 of side plate 6, two is pre-
Part forming die, the form vibrator be divided into 3 groups be bolted on the two edges of prefabricated pipe section die bottom plate 1 and in
Portion, one of longitudinal vibrator 2 and a lateral oscillators 3 are 1 group, and the clear distance between every group of two vibrators is 2cm,
The vibrator of the vibrator group ragged edge positioned at die edge is 20cm with a distance from the longitudinal side plate 6 of mould two, described
It is the both sides of 1cm that transverse and longitudinal vibrator in the middle part of mould is located at the distance away from mould injected hole 4 respectively, described vertically and horizontally to shake
Dynamic centrifugal motion of the device by vibrator, driven mold vibrates in direction in length and breadth respectively together, and frequency is 50Hz, mixed so as to overcome
The open defects such as solidifying soil outer surface bubble, pitted skin.
(2), when blanking is produced, lateral oscillators 3 are first opened, it is 20s/m to control blanking velocity3, until material is lower completely extremely
At mould 1/3, stop blanking.Blanking velocity can not ether it is fast, it is not in place with without vibration；Blanking velocity also can not ether it is slow, with
When exempting from placement layer by layer, cold seam phenomenon is produced between layers.
(3), after vibration 1min, keep blanking velocity constant, continue at blanking to the 2/3 of segment die, stop blanking；
(4), after vibration 1min, keep blanking velocity constant, continue lower full remaining material；
(5) lateral oscillators 3, are closed, longitudinal vibrator 2 is opened, is closed after vibration 1min.
Comparative example
Referring to Fig. 4, conventional vibration pattern is carried out according to the following steps：
(1), 3 longitudinal form vibrators 2 are installed on prefabricated pipe section mould, longitudinal form vibrator 2 leads to
Cross and be bolted to the two edges of prefabricated pipe section die bottom plate 1 and middle part, the vibrator positioned at die edge is from mould
The distance of two longitudinal side plates 6 is 20cm, the longitudinal vibrator 2 in the middle part of mould be located at away from mould injected hole 4 away from
From the centrifugal motion that the side for 1cm, the longitudinal vibrator 2 pass through vibrator, driven mold vibrates in longitudinal direction together, frequency
Rate is 50Hz.
(2), when blanking is produced, whole longitudinal vibrators 2 are opened, it is 20s/m to control blanking velocity3, until material is lower full
To mould 1/3, stop blanking.
(3), after vibration 30s, continue blanking to lockhole position, stop blanking；
(4), after vibration 50s, keep blanking velocity constant, continue lower full remaining material.
(5) the ambilateral longitudinal vibrator 2 of mould, is closed, is closed after retaining the middle vibration of longitudinal vibrator 2 1min.
Longitudinal direction number of bubbles in section of jurisdiction is 0~16/10cm under conventional vibration mode2, section of jurisdiction transverse direction number of bubbles is 0
~195/10cm2；Longitudinal direction number of bubbles in section of jurisdiction is 0~15/10cm under mode of vibration of the present invention2, section of jurisdiction transverse direction bubble
Quantity is 0~14/10cm2.Comparative illustration, the present invention can effectively reduce the gas of horizontal direction in prefabricated pipe section production process
Bubble quantity, greatly improves the quality of production, and method is simple, and effect is obvious, it is easy to promote.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (9)
1. the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production, it is characterised in that carried out according to the following steps：
(1), installed on prefabricated pipe section mould and be no less than 6 vibrators, by a longitudinal vibrator and a lateral oscillators
It is divided into 1 group, is arranged in mould both sides and middle part；
(2), when blanking is produced, lateral oscillators are first opened, until material is lower full to mould lockhole position, the lockhole position tool
Body refers at the most middle lockhole of mould horizontal direction side plate；
(3), stop blanking, close lateral oscillators, open longitudinal vibrator, continue lower full remaining material；
(4) the ambilateral longitudinal vibrator of mould, is closed, is retained mould middle part longitudinal vibrator and is continued to vibrate 1min.
2. the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production, it is characterised in that carried out according to the following steps：
(1), installed on prefabricated pipe section mould and be no less than 6 vibrators, by a longitudinal vibrator and a lateral oscillators
It is divided into 1 group, is arranged in mould both sides and middle part；
(2), when blanking is produced, lateral oscillators are first opened, until material is lower full to mould 1/3, stops blanking；
(3), after vibration 1min, continue at blanking to the 2/3 of mould, stop blanking；
(4), after vibration 1min, lower full remaining material is continued；
(5) lateral oscillators, are closed, longitudinal vibrator is opened, after vibration 1min, vibrator is closed.
3. the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production according to claim 1 and 2, it is characterised in that institute
State prefabricated pipe section mould mould steel making, connected by one piece of base plate, four blocks of side plates, two pieces of top boards constitute for tunnel
The specificity precast concrete mould of road section of jurisdiction production, has injected hole in the middle of the base plate.
4. the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production according to claim 1 and 2, it is characterised in that institute
It is 2cm to state the clear distance between every group of two vibrators of vibrator.
5. the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production according to claim 1 and 2, it is characterised in that institute
Vibrator is stated to be attached on the base plate of the prefabricated pipe section mould by bolt.
6. the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production according to claim 1 and 2, it is characterised in that institute
State blanking velocity and be 20s/m3。
7. the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production according to claim 1 and 2, it is characterised in that institute
The frequency for stating vibrator is 50Hz, and the centrifugal motion that the vertically and horizontally vibrator passes through vibrator, driven mold is distinguished together
In the vibration of direction in length and breadth.
8. the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production according to claim 1 and 2, it is characterised in that institute
Rheme is 20cm in the vibrator of the vibrator group ragged edge of die edge with a distance from the longitudinal side plate of mould two, described to be located at
Transverse and longitudinal vibrator in the middle part of mould is located at apart from the both sides of mould injected hole 1cm respectively.
9. the vibrating method of bubble removing is removed in a kind of prefabricated pipe section production according to claim 1, it is characterised in that the lock
In on the prefabricated pipe section die side plate, bottom is 12cm with a distance from base plate to hole position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710053632.8A CN106827177B (en) | 2017-01-22 | 2017-01-22 | The vibrating method of bubble removing is removed in a kind of prefabricated pipe section production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710053632.8A CN106827177B (en) | 2017-01-22 | 2017-01-22 | The vibrating method of bubble removing is removed in a kind of prefabricated pipe section production |
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| CN106827177A true CN106827177A (en) | 2017-06-13 |
| CN106827177B CN106827177B (en) | 2018-11-30 |
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ID=59120349
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107738349A (en) * | 2017-10-13 | 2018-02-27 | 中铁四局集团第四工程有限公司 | A kind of method for prefabricating suitable for large-scale section of jurisdiction |
| CN107756600A (en) * | 2017-11-20 | 2018-03-06 | 上海师范大学 | Cement section of jurisdiction arc surface receives water floating device automatically |
| CN108044765A (en) * | 2017-11-24 | 2018-05-18 | 绍兴市永坚建筑科技有限公司 | A kind of cast vibrating method of precast concrete |
| CN108705668A (en) * | 2018-05-08 | 2018-10-26 | 上海浦东混凝土制品有限公司 | A kind of concrete pipe sheet pours the system of smashing and concrete pipe sheet pours the method for smashing |
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| CN101439553A (en) * | 2008-12-30 | 2009-05-27 | 朱春生 | Method for pouring and molding large scale disposal wallboard and mould carriage thereof |
| CN103046441A (en) * | 2012-12-27 | 2013-04-17 | 中国建筑第六工程局有限公司 | Slab ballastless track self-compacting concrete pouring construction method |
| CN203863800U (en) * | 2014-05-29 | 2014-10-08 | 桂林永福龙港绿色环保建材有限公司 | Vibration device for cement partition board pouring |
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| JPH03266605A (en) * | 1990-03-16 | 1991-11-27 | Showa Concrete Ind Co Ltd | Retaining mold apparatus of concrete member |
| CN1100025A (en) * | 1993-09-09 | 1995-03-15 | 任华国 | Method for production of side mould of prefabricated hollow floor |
| CN101439553A (en) * | 2008-12-30 | 2009-05-27 | 朱春生 | Method for pouring and molding large scale disposal wallboard and mould carriage thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107738349A (en) * | 2017-10-13 | 2018-02-27 | 中铁四局集团第四工程有限公司 | A kind of method for prefabricating suitable for large-scale section of jurisdiction |
| CN107756600A (en) * | 2017-11-20 | 2018-03-06 | 上海师范大学 | Cement section of jurisdiction arc surface receives water floating device automatically |
| CN107756600B (en) * | 2017-11-20 | 2024-05-24 | 上海师范大学 | Automatic water collecting and trowelling device for circular arc surface of cement duct piece |
| CN108044765A (en) * | 2017-11-24 | 2018-05-18 | 绍兴市永坚建筑科技有限公司 | A kind of cast vibrating method of precast concrete |
| CN108705668A (en) * | 2018-05-08 | 2018-10-26 | 上海浦东混凝土制品有限公司 | A kind of concrete pipe sheet pours the system of smashing and concrete pipe sheet pours the method for smashing |
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| Publication number | Publication date |
|---|---|
| CN106827177B (en) | 2018-11-30 |
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