CN108824692A - Concrete prefabricated board, concrete folding plate and concrete prefabricated board construction method - Google Patents

Concrete prefabricated board, concrete folding plate and concrete prefabricated board construction method Download PDF

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Publication number
CN108824692A
CN108824692A CN201810862069.3A CN201810862069A CN108824692A CN 108824692 A CN108824692 A CN 108824692A CN 201810862069 A CN201810862069 A CN 201810862069A CN 108824692 A CN108824692 A CN 108824692A
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CN
China
Prior art keywords
concrete
concrete bodies
truss
bodies
prefabricated
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Pending
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CN201810862069.3A
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Chinese (zh)
Inventor
周朝双
施平西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chengdu Ya Fan Environmental Protection Technology Co Ltd
Sichuan Ou Wei New Type Building Material Co Ltd
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Chengdu Ya Fan Environmental Protection Technology Co Ltd
Sichuan Ou Wei New Type Building Material Co Ltd
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Publication date
Application filed by Chengdu Ya Fan Environmental Protection Technology Co Ltd, Sichuan Ou Wei New Type Building Material Co Ltd filed Critical Chengdu Ya Fan Environmental Protection Technology Co Ltd
Priority to CN201810862069.3A priority Critical patent/CN108824692A/en
Publication of CN108824692A publication Critical patent/CN108824692A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17Floor structures partly formed in situ

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Foundations (AREA)

Abstract

The present invention provides a kind of concrete prefabricated board, concrete folding plate and concrete prefabricated board construction methods, belong to the realm of building construction.The concrete prefabricated board includes prefabricated foundation component and prefabricated connection component.Wherein prefabricated foundation component includes the first concrete bodies, and prefabricated connection component includes truss and the second concrete bodies, and truss is arranged at intervals on the first concrete bodies, has foamed concrete bodies between adjacent truss.Since there are gaps between truss and foamed concrete bodies, second concrete bodies, the first concrete bodies, truss and foamed concrete bodies can be in conjunction with one entirety of formation, and foamed concrete bodies quality is lighter, it can reduce the density of concrete prefabricated board entirety, mass per volume is reduced, to reduce transportation cost.

Description

Concrete prefabricated board, concrete folding plate and concrete prefabricated board construction method
Technical field
The present invention relates to the realm of building construction, in particular to a kind of concrete prefabricated board, concrete folding plate and mix The solidifying prefabricated board construction method of soil.
Background technique
Prefabricated board is usually to produce and process in factory, and precast concrete after molding transports directly to construction It is installed in place.For Bars In Poured Concrete Slab, speed of application is fast, can shorten construction period, engineering cost is effectively reduced.
Current prefabricated board is laid with one layer of steel mesh usually in mold, then carries out concreting.This prefabricated board Density is larger, and bulk density is larger, and transportation cost is high.
Summary of the invention
The present invention provides a kind of concrete prefabricated boards, it is intended to reduce the density of concrete prefabricated board.
The invention is realized in this way:
A kind of concrete prefabricated board, including prefabricated foundation component and prefabricated connection component.
Wherein, prefabricated foundation component includes the first concrete bodies.Prefabricated connection component includes truss and the second concrete bodies, Truss is arranged at intervals on the first concrete bodies, has foamed concrete bodies, foamed concrete bodies and purlin between adjacent truss Frame gap setting, the second concrete bodies are formed in the gap of truss and foamed concrete bodies and are covered in the table of foamed concrete bodies Face, so that the second concrete bodies are respectively in conjunction with the first concrete bodies, truss and foam concrete block, and truss winds up Reinforcing bar is in the outside of the second concrete bodies.
Further, in an embodiment of the present invention, prefabricated foundation component further includes wood cement board, wood wool cement Plate is in conjunction with the first concrete bodies and wood cement board is in the bottom of the first concrete bodies.
Further, in an embodiment of the present invention, it is provided with and adds between wood cement board and the first concrete bodies Concrete steel expanded metals.
Further, in an embodiment of the present invention, the height of foamed concrete bodies is lower than the height of truss at least 20 millimeters.
Further, in an embodiment of the present invention, truss is equidistantly layed on the first concrete bodies.
Further, in an embodiment of the present invention, foamed concrete bodies are that cement foamed lath and/or cement are sent out Steep block.
The present invention provides a kind of concrete folding plate, including aforementioned concrete prefabricated board, steel mesh and third concrete Body.
Wherein, steel mesh is layed in the winding up on reinforcing bar of truss.Third concrete bodies be formed in the surface of steel mesh and with Second concrete bodies combine.
The present invention also provides a kind of concrete prefabricated board construction methods, include the following steps:
Wood cement board, reinforced expanded metal mesh are successively laid in prefabricated board die;
Concreting and the first concrete bodies of smooth formation that vibrate are carried out to reinforced expanded metal mesh;
The surface interval of the first concrete bodies after smooth is laid with truss;
Foamed concrete bodies are placed between adjacent truss, and are reserved between foamed concrete bodies and truss free Gap;
A concreting is carried out again and forms the second concrete layer after the completion of vibrating, and the reinforcing bar that winds up of truss is the The outside of two concrete bodies.
It further, in an embodiment of the present invention, further include following steps:
Steel mesh is set up in the reinforcing bar that winds up of truss;
It is poured to steel mesh inner concrete, forms third concrete bodies.
Further, in an embodiment of the present invention, hair pulling treatment is carried out to the surface of the second concrete bodies.
The beneficial effects of the invention are as follows:The concrete prefabricated board that the present invention obtains by above-mentioned design, including prefabricated foundation Component and prefabricated connection component.Wherein state prefabricated foundation component include the first concrete bodies, prefabricated connection component include truss and Second concrete bodies, truss are arranged at intervals on the first concrete bodies, have foamed concrete bodies between adjacent truss.Due to There are gap, the second concrete bodies, the first concrete bodies, truss and foamed concrete bodies between truss and foamed concrete bodies Can be in conjunction with one entirety of formation, and foamed concrete bodies quality is lighter, can reduce the density of concrete prefabricated board entirety, drop Low mass per volume, to reduce transportation cost.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of concrete prefabricated board provided in an embodiment of the present invention;
Fig. 2 is the structural schematic diagram of another concrete prefabricated board provided in an embodiment of the present invention;
Fig. 3 is the process schematic that the first concrete bodies provided in an embodiment of the present invention pour reinforced expanded metal mesh;
Fig. 4 is a kind of structural schematic diagram of concrete folding plate provided in an embodiment of the present invention.
Icon:100- concrete prefabricated board;10- prefabricated foundation component;The first concrete bodies of 12-;14- reinforced expanded metal mesh; 16- wood cement board;The prefabricated connection component of 30-;32- truss;The second concrete bodies of 34-;36- foamed concrete bodies;200- is mixed Solidifying soil superimposed sheet;50- steel mesh;70- third concrete bodies.
Specific embodiment
To keep the purposes, technical schemes and advantages of embodiment of the present invention clearer, implement below in conjunction with the present invention The technical solution in embodiment of the present invention is clearly and completely described in attached drawing in mode, it is clear that described reality The mode of applying is some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ability Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention The range of protection.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below to protect The scope of the present invention of shield, but it is merely representative of selected embodiment of the invention.Based on the embodiment in the present invention, ability Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention The range of protection.
It should be noted that:Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it is to be understood that, the orientation or positional relationship of the instructions such as term " on ", "lower" is base In orientation or positional relationship shown in the drawings, it is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion Signified equipment or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this The limitation of invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more, Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, the terms such as term " connected ", " connection ", " fixation " are answered It is interpreted broadly, for example, it may be being fixedly connected, may be a detachable connection, or is integral;It can be directly connected, The connection inside two elements or the interaction relationship of two elements can be can be indirectly connected through an intermediary.It is right For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower" It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above " Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of First feature horizontal height is less than second feature.
Embodiment
Fig. 1-3 is please referred to, the present invention provides a kind of concrete prefabricated board 100, including prefabricated foundation component 10 and prefabricated company Connected components 30.
Wherein, prefabricated foundation component 10 includes the first concrete bodies 12.Prefabricated connection component 30 includes truss 32 and second Concrete bodies 34, truss 32 are arranged at intervals on the first concrete bodies 12, have foamed concrete bodies between adjacent truss 32 36, foamed concrete bodies 36 and 32 gap setting of truss, the second concrete bodies 34 are formed in truss 32 and foamed concrete bodies 36 Gap and be covered in the surfaces of foamed concrete bodies 36 so that the second concrete bodies 34 respectively with the first concrete bodies 12, Truss 32, foamed concrete bodies 36 combine, and the reinforcing bar that winds up of truss 32 is in the outside of the second concrete bodies 34.
In the present embodiment, in order to reduce the density of concrete prefabricated board 100, the present invention is using foam concrete as filling out Build material.Foam concrete is that foaming agent is mechanically sufficiently foamed by the foamed system of foaming machine, and will steep Foam is mixed with cement slurry, then carries out cast-in-place construction or mold molding, the institute after natural curing by the pumping system of foaming machine A kind of light heat insulation material containing a large amount of sealed porositys of formation.Specific to the present embodiment, the top of the first concrete bodies 12 It is laid with truss 32, foamed concrete bodies 36 are placed between adjacent truss 32.Optionally, truss 32 is spread according to certain spacing If in the present embodiment, the laying spacing between truss 32 is 600mm.It should be noted that in other embodiments, spacing It can according to need and be determined, the present embodiment is not specifically limited its spacing.In addition, truss 32 and foamed concrete bodies 36 Between be separated by a certain distance so that concrete can flow, since concrete has preferable mobility, concrete energy before initial set Enough flow in the gap of truss 32, foamed concrete bodies 36 and combined with the first concrete bodies 12 with by the first concrete bodies 12, Truss 32 and foamed concrete bodies 36 combine to form entirety, the knot that concrete itself is formed after this concreting Structure is the second concrete bodies 34.It should be noted that 32 highest reinforcing bars of truss are the reinforcing bar that winds up of truss 32.Into When row concreting, the reinforcing bar that winds up of truss 32 should be stayed in the outside of the second concrete bodies 34, for subsequent concrete The development of cast-in-place process.Optionally, the height of foamed concrete bodies 36 is lower than the height at least 20mm of truss 32.Foam concrete 36 quality of body is lighter, can reduce the density of concrete prefabricated board 100, reduces mass per volume, so as to reduce transport Cost.In addition, using the building of the concrete prefabricated board 100 since foamed concrete bodies 36 also have the function of heat preservation and soundproof Object or structures can have preferable suction, deadening and thermal insulation property preferable.
Specifically, in the present embodiment, the first concrete bodies 12 can be is poured by thick pea gravel concreten, can also be with It is to be formed by grouting material concreting.
In order to improve the intensity of the first concrete bodies 12, prefabricated foundation component 10 further includes reinforced expanded metal mesh 14.Specifically, For the setting of reinforced expanded metal mesh 14 in bottom, the formation in connection of the first concrete bodies 12 is whole, please refers to Fig. 3.
It is to be carried out in prefabricated board die, in concrete prefabricated board in the production process of concrete prefabricated board 100 It needs to carry out demoulding processing after 100 productions, that is, concrete prefabricated board 100 is separated with prefabricated board die.It is existing to be generally It is demoulded using release agent, and time-consuming for this release method, it is also relatively complicated, especially after concreting, generally All it is that release agent is added along side wall, is difficult to control the release agent usage amount of bottom and demoulding situation.For this purpose, generalling use now Sheet metal as prefabricated board die, after the production of concrete prefabricated board 100 sheet metal can not remove it is direct with it is concrete prefabricated Plate 100 is used together, but its higher cost, and sheet metal permeability is very poor, if construction is at the residential locations such as house, people Wherein comfort of living is poor.
In view of the above-mentioned problems, the prefabricated foundation component 10 of the present embodiment further includes wood cement board 16.Wood cement board 16 It is laid on the bottom of prefabricated board die, reinforced expanded metal mesh 14 is then laid on the top of wood cement board 16, due to the first concrete Body 12 has mobility when pouring, and can be combined through reinforced expanded metal mesh 14 with wood cement board 16, three forms entirety.Wood Silk cement plate 16 can prevent concrete from contacting with the bottom of prefabricated board die, therefore, the nothing after the production of concrete prefabricated board 100 The release problems that need to consider bottom, reduce production process.And wood cement board 16 can be used as ornament materials, such as, On the ceiling by the one side setting with wood cement board 16, it is equivalent in project subject construction while being fitted up, It is advanced by the running time of engineering significantly.Optionally, the thickness of wood cement board 16 is in 20~30mm, the first concrete bodies 12 With a thickness of 10~20mm.
Wherein, foamed concrete bodies 36 are cement foamed lath or cement foamed piece, and the two can also be used cooperatively certainly. It can be spliced when the length of single foamed concrete bodies 36 is inadequate, be guaranteed along 100 Impact direction of concrete prefabricated board Length is identical as the length of foamed concrete bodies 36.It can guarantee concrete prefabricated board 100 when load-bearing along it in this way The direction of stress be it is equally distributed, can prevent unbalance stress cause concrete prefabricated board 100 fracture, crack etc. it is bad Phenomenon.
The present invention separately provides a kind of concrete folding plate 200, including concrete prefabricated board 100, steel mesh 50 and third Concrete bodies 70.
Wherein, steel mesh 50 is layed in the winding up on reinforcing bar of truss 32.Third concrete bodies 70 are formed in steel mesh 50 Surface is simultaneously combined with third concrete bodies 70.
Superimposed sheet is the preferable form for combining prefabricated board and cast-in-place concrete, and the two forms an entirety, jointly by Power.In the present embodiment, the effect of truss 32 be that it is possible to increase concrete prefabricated board 100 rigidity so that its production, It is hardly damaged in transport and hoisting process.And due to when the second concrete bodies 34 pour the reinforcing bar that winds up of truss 32 be located at the The outside of two concrete bodies 34, can be by concrete prefabricated board 100 preferably with when third concrete bodies 70 are poured Three concrete bodies 70, which combine, forms entirety, increases whole shearing strength, and the effect of steel mesh 50 is to form one Convenient for the gap of pouring molding, and the effect of skeleton is undertaken, also can be improved whole shearing strength.
The present invention separately provides a kind of concrete prefabricated board construction method, includes the following steps:
Wood cement board 16, reinforced expanded metal mesh 14 are successively laid in prefabricated board die.
Concreting and the first concrete bodies 12 of smooth formation that vibrate are carried out to reinforced expanded metal mesh 14.
The surface interval of the first concrete bodies 12 after smooth is laid with truss 32.
Foamed concrete bodies 36 are placed between adjacent truss 32, and pre- between foamed concrete bodies 36 and truss 32 There are gaps.
The second concrete bodies 34, and the reinforcing bar that winds up of truss 32 are formed after the completion of carrying out a concreting again and vibrating In the outside of the second concrete bodies 34.
Steel mesh 50 is set up in the reinforcing bar that winds up of truss 32.
Concreting is carried out again, forms third concrete bodies 70.
It is mixed to first in order to further increase the bond strength of 12 contact surface of the second concrete bodies 34 and the first concrete bodies The surface of the solidifying soil body 12 carries out hair pulling treatment, specifically, can in the multiple grooves of the surface of the first concrete bodies 12 cutting or Person's scratch, or hair pulling treatment is directly carried out before final set after 12 initial set of the first concrete bodies.When the second concrete bodies 34 are pouring Concrete can be flowed into or be penetrated into groove or scratch when building, in this way, the second concrete bodies 34 connect with the first concrete bodies 12 Contacting surface can be combined preferably.
It is mixed to second in order to further increase the bond strength of the second concrete bodies 34 and 70 contact surface of third concrete bodies The surface of the solidifying soil body 34 carries out hair pulling treatment, specifically, multiple grooves can be cut on the surface of the second concrete bodies 34, or Person directly carries out hair pulling treatment before final set after 34 initial set of the second concrete bodies.When the second concrete when pouring of concrete bodies 34 It can flow into or penetrate into groove or scratch, in this way, the second concrete bodies 34 can be more with 70 contact surface of third concrete bodies It combines well.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of concrete prefabricated board, which is characterized in that including
Prefabricated foundation component, the prefabricated foundation component include the first concrete bodies;And
Prefabricated connection component, the prefabricated connection component include truss and the second concrete bodies, and the truss is arranged at intervals at institute It states on the first concrete bodies, there is foamed concrete bodies, the foamed concrete bodies and the purlin between the adjacent truss Frame gap setting, second concrete bodies are formed in the gap of the truss and the foamed concrete bodies and are covered in described The surface of foamed concrete bodies so that second concrete bodies respectively with first concrete bodies, the truss and The foam concrete block combines, and the reinforcing bar that winds up of the truss is in the outside of second concrete bodies.
2. concrete prefabricated board according to claim 1, which is characterized in that the prefabricated foundation component further includes wood wool water Mud plate, the wood cement board is in conjunction with first concrete bodies, and the wood cement board is in first concrete The bottom of body.
3. concrete prefabricated board according to claim 2, which is characterized in that the wood cement board and first coagulation Reinforced expanded metal mesh is provided between the soil body.
4. concrete prefabricated board according to claim 1, which is characterized in that described in the height ratio of the foamed concrete bodies The height of truss is at least 20 millimeters low.
5. concrete prefabricated board according to claim 1, which is characterized in that the truss is equidistantly layed in described first On concrete bodies.
6. concrete prefabricated board according to claim 1, which is characterized in that the foamed concrete bodies are cement foam board Item and/or cement foamed piece.
7. a kind of concrete folding plate, which is characterized in that including
Concrete prefabricated board described in any one of claims 1-6;
Steel mesh, the steel mesh are layed in the winding up on reinforcing bar of the truss;And
Third concrete bodies, the third concrete bodies be formed in the surface of the steel mesh and with the second concrete bodies knot It closes.
8. a kind of concrete prefabricated board construction method, which is characterized in that include the following steps:
Wood cement board, reinforced expanded metal mesh are successively laid in prefabricated board die;
Concreting and the first concrete bodies of smooth formation that vibrate are carried out to the reinforced expanded metal mesh;
The surface interval of first concrete bodies after smooth is laid with truss;
Foamed concrete bodies are placed between the adjacent truss, and pre- between the foamed concrete bodies and the truss There are gaps;
The surface in gap and foam concrete of the concreting between the foamed concrete bodies and the truss is formed Second concrete layer, and the reinforcing bar that winds up of the truss is in the outside of second concrete bodies.
9. concrete prefabricated board construction method according to claim 8, which is characterized in that further include following steps:
Steel mesh is set up in the reinforcing bar that winds up of the truss;
It is poured to the steel mesh inner concrete, forms the third concrete bodies in conjunction with the second concrete bodies.
10. concrete prefabricated board construction method according to claim 8, which is characterized in that the table of the second concrete bodies Face carries out hair pulling treatment.
CN201810862069.3A 2018-08-01 2018-08-01 Concrete prefabricated board, concrete folding plate and concrete prefabricated board construction method Pending CN108824692A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110206210A (en) * 2019-06-13 2019-09-06 石家庄铁道大学 Assembled composite floor plate and its construction method

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ATA3593A (en) * 1993-01-12 1994-02-15 Avi Alpenlaendische Vered CEILING CONSTRUCTION AND METHOD FOR PRODUCING THE SAME
RU19394U1 (en) * 2000-12-07 2001-08-27 Акционерное общество закрытого типа "РИКЭЛ" Overlap
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CN106223529A (en) * 2016-07-21 2016-12-14 同济大学 A kind of out-hung panel of lightgage steel joist wood composite filament plate and preparation method thereof
CN106245842A (en) * 2016-09-14 2016-12-21 南京工业大学 The wood cement board of a kind of multiple structure and processing method thereof
CN106760101A (en) * 2017-03-05 2017-05-31 北京工业大学 A kind of prefabricated superimposed sheet
CN208870274U (en) * 2018-08-01 2019-05-17 四川省欧威新型建材有限公司 Concrete prefabricated board and concrete folding plate

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Publication number Priority date Publication date Assignee Title
CH658091A5 (en) * 1984-07-17 1986-10-15 Planchers Kaiser S A Prefabricated construction element for the construction of floors, terraces or roofs
ATA3593A (en) * 1993-01-12 1994-02-15 Avi Alpenlaendische Vered CEILING CONSTRUCTION AND METHOD FOR PRODUCING THE SAME
RU19394U1 (en) * 2000-12-07 2001-08-27 Акционерное общество закрытого типа "РИКЭЛ" Overlap
CN101565984A (en) * 2008-04-21 2009-10-28 万科企业股份有限公司 Precast concrete slab and preparation method thereof
US20100230999A1 (en) * 2009-03-13 2010-09-16 Michael William Setzer Ultra-Light Tent Trailer
CN102787689A (en) * 2012-07-31 2012-11-21 长沙远大住宅工业有限公司 Prefabricated overlapped hollow floor and fabricating method thereof
CN106223529A (en) * 2016-07-21 2016-12-14 同济大学 A kind of out-hung panel of lightgage steel joist wood composite filament plate and preparation method thereof
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110206210A (en) * 2019-06-13 2019-09-06 石家庄铁道大学 Assembled composite floor plate and its construction method

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