CN110080456A - A kind of the superimposed sheet bottom plate and its construction technology of the connection of end joint bar - Google Patents
A kind of the superimposed sheet bottom plate and its construction technology of the connection of end joint bar Download PDFInfo
- Publication number
- CN110080456A CN110080456A CN201910343353.4A CN201910343353A CN110080456A CN 110080456 A CN110080456 A CN 110080456A CN 201910343353 A CN201910343353 A CN 201910343353A CN 110080456 A CN110080456 A CN 110080456A
- Authority
- CN
- China
- Prior art keywords
- superimposed sheet
- bottom plate
- sleeve
- sheet bottom
- joint bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims abstract description 12
- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 19
- 239000004567 concrete Substances 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 13
- 210000003205 muscle Anatomy 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
-
- 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
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
-
- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/28—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups combinations of materials fully covered by groups E04C2/04 and E04C2/08
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Panels For Use In Building Construction (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses the superimposed sheet bottom plates and its construction technology of a kind of connection of end joint bar, including superimposed sheet bottom plate ontology, superimposed sheet bottom plate body end to be embedded with one group of sleeve, and the inclined arrangement of each sleeve；Joint bar is equipped in the sleeve, and joint bar bottom end is located at the outside of sleeve.The present invention has the characteristics that easy for installation and connects reliable.
Description
Technical field
The present invention relates to a kind of superimposed sheet bottom plate, the superimposed sheet bottom plate and its construction work of especially a kind of end joint bar connection
Skill.
Background technique
In response to building industrialization, the prefabricated completion in factory of more and more building elements, among these, horizontal member
It is earliest one of the component for realizing that batch production is prefabricated, the reason is that, horizontal member is prefabricated to influence integrally-built anti-seismic performance
Smaller, the production and installation of horizontal member are also fairly simple.Currently, horizontal member it is prefabricated be most widely used be overlapping building
Plate, laminated floor slab are the assembled integral floors being formed by stacking by superimposed sheet bottom plate and cast-in-situ steel reinforced concrete.According to existing rule
The 6.6.4 articles of model " fabricated construction technical regulation " (JGJ1-2014) regulation, the Reinforcement at superimposed sheet bottom plate plate end are suitable
From the rear pouring concrete that backbar or wall are stretched out and anchored into plate end, anchorage length is no less than 5d, and (d is that Reinforcement is straight
Diameter), and support center line is preferably extended through, this Reinforcement just needs to stretch out from an entire row on superimposed sheet bottom plate in this way, as recklessly
It is sub the same, it is commonly called as " beard " muscle.In order to solve " beard " muscle during the production of superimposed sheet bottom plate, transport and lifting because
Bending deforms and causes precast concrete breakage and unfilled corner and superimposed sheet bottom plate when lifting in place, " beard muscle " and overlapping
The upper longitudinal bar of plate backbar installs troublesome problem in caused by cross-shaped；In license Publication No. " CN
In 207988291 U ", the patent that patent name is " the unidirectional superimposed sheet bottom plate that a kind of plate end does not go out muscle ", a kind of " institute is disclosed
" beard " muscle, the pre-buried several mechanical connection sets in the end of unidirectional superimposed sheet bottom plate are not stretched out in the end for stating unidirectional superimposed sheet bottom plate
Cylinder is mechanically connected strong ties, the other end and the anchor bars such as the Reinforcement in sleeve one end and unidirectional superimposed sheet bottom plate
Equal strong ties." technical solution, for solving the above problems.But after the lifting of superimposed sheet bottom plate is in place, due to connecting reinforcing bar
Need to be mounted on the side of overlapping bottom plate, and its side is beam or wall, the space of beam or wall is smaller, and reinforcing bar is again more, connection reinforcing bar
Operated when rotation is tightened it is inconvenient, cause connect reinforcing bar installation be more troublesome, it is difficult to guarantee connection reliability.Cause
This, existing technology be more troublesome there is installation with construction quality it is difficult to ensure that the problem of.
Summary of the invention
The object of the present invention is to provide the superimposed sheet bottom plates and its construction technology of a kind of connection of end joint bar.The present invention
Have the characteristics that easy for installation and connects reliable.
Technical solution of the present invention: a kind of superimposed sheet bottom plate of end joint bar connection, including superimposed sheet bottom plate ontology, overlapping
Board bottom plate body end is embedded with one group of sleeve, and the inclined arrangement of each sleeve；Joint bar, and joint bar bottom are equipped in the sleeve
End is located at the lower section of sleeve.
In a kind of superimposed sheet bottom plate of end joint bar connection above-mentioned, the inner wall of the sleeve is internal thread structure.
In a kind of superimposed sheet bottom plate of end joint bar connection above-mentioned, the joint bar includes the sleeve phase with internal thread structure
The threaded rod of cooperation, threaded rod lower end are equipped with anchor bar, and threaded rod upper end is equipped with nut.
In a kind of superimposed sheet bottom plate of end joint bar connection above-mentioned, the inner wall of the sleeve is smooth structure；It is described to insert
Muscle is the connection reinforcing bar of bending structure.
In a kind of superimposed sheet bottom plate of end joint bar connection above-mentioned, the horizontal plane of the sleeve and superimposed sheet bottom plate ontology
Between slanted angle be 20-60 degree.
In a kind of superimposed sheet bottom plate of end joint bar connection above-mentioned, the horizontal plane of the sleeve and superimposed sheet bottom plate ontology
Between slanted angle be 45 degree.
In a kind of superimposed sheet bottom plate of end joint bar connection above-mentioned, the symmetrical end difference of the two of the superimposed sheet bottom plate ontology
It is embedded with one group of sleeve.
In a kind of superimposed sheet bottom plate of end joint bar connection above-mentioned, 4 side ends point of the superimposed sheet bottom plate ontology
It is not embedded with one group of sleeve.
A kind of construction technology of the superimposed sheet bottom plate of end joint bar connection, comprising the following steps:
A, the platform mould of prefabricated superimposed sheet bottom plate is made according to design requirement；
B, superimposed sheet baseplate reinforcing bar is arranged in Tai Monei according to design requirement；
C, after sealing sleeve, lashing guarantees sleeve tilt angle in error range on superimposed sheet baseplate reinforcing bar
Within；
D, superimposed sheet bottom plate concrete is poured and conserves, taking-up obtains superimposed sheet bottom plate ontology；
E, after superimposed sheet bottom plate ontology being transported to scene and lifted in place, joint bar is installed into sleeve, and make joint bar
Bottom end through go out sleeve after anchor into the rear pouring concrete of backbar or wall.
Compared with prior art, the present invention is by the sleeve in the pre-buried inclined arrangement in the end of superimposed sheet bottom plate ontology,
And joint bar is set in sleeve, joint bar anchors into the rear pouring concrete of backbar or wall after passing through sleeve, corresponding to realize with this
Connection.This technology is not needed from the supporting beam of superimposed sheet bottom plate or wall side installation connection reinforcing bar, the behaviour of installation connection reinforcing bar
Become side in superimposed sheet as face, this measure greatly facilitates the installation of superimposed sheet bottom plate connection reinforcing bar, also can effectively guarantee
The labor intensity of construction quality and reduced worker improves installation effectiveness.In addition, by setting internal thread structure for sleeve,
And it is cooperating therewith by threaded rod, so that easy for installation, stable connection is secured, by the way that anchor bar is arranged in threaded rod lower end
It realizes corresponding connection, by the way that nut is arranged in the upper end of threaded rod, is not only convenient for the knob-operated of joint bar, and enhance
Anchoring effect of the joint bar in superimposed sheet.In conclusion the present invention has the characteristics that easy for installation and connects reliable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the installation site figure of the sleeve in Fig. 1；
Fig. 3 is the structural schematic diagram of the joint bar in embodiment 1；
Fig. 4 is the structural schematic diagram of the embodiment of the present invention 2；
Fig. 5 is the structural schematic diagram of Fig. 4 middle sleeve；
Fig. 6 is the structural schematic diagram of joint bar in embodiment 2；
Fig. 7 is the installation schematic isometric of sleeve.
The label in accompanying drawing is: 1- superimposed sheet bottom plate ontology, 2- sleeve, 3- joint bar, 301- threaded rod, 302- anchor steel
Muscle, 303- nut.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples, but be not intended as to the present invention limit according to
According to.
Embodiment 1.A kind of superimposed sheet bottom plate of end joint bar connection, is constituted as shown in Fig. 1 to Fig. 3 and Fig. 7, including overlapping
Board bottom plate ontology 1,1 end of superimposed sheet bottom plate ontology are embedded with one group of sleeve 2, and the inclined arrangement of each sleeve 2；The sleeve
Joint bar 3 is equipped in 2, and 3 bottom end of joint bar is located at the lower section of sleeve 2.Joint bar 3 pass through anchor into after backbar or wall after sleeve pour it is mixed
In solidifying soil.
The inner wall of the sleeve 2 is internal thread structure.
The joint bar 3 includes the threaded rod 301 matched with the sleeve 2 of internal thread structure, and 301 lower end of threaded rod is equipped with anchor
Gu reinforcing bar 302,301 upper end of threaded rod is equipped with nut 303.
Slanted angle between the sleeve 2 and the horizontal plane of superimposed sheet bottom plate ontology 1 is 20-60 degree.
Slanted angle between the sleeve 2 and the horizontal plane of superimposed sheet bottom plate ontology 1 is 45 degree.
The symmetrical end of the two of the superimposed sheet bottom plate ontology 1 is embedded with one group of sleeve 2 respectively.This is unidirectional superimposed sheet bottom plate.
4 side ends of the superimposed sheet bottom plate ontology 1 are embedded with one group of sleeve 2 respectively.This is bidirectional laminated slab bottom plate.
A kind of construction technology of the superimposed sheet bottom plate of end joint bar connection, comprising the following steps:
A, the platform mould of prefabricated superimposed sheet bottom plate is made according to design requirement；
B, superimposed sheet baseplate reinforcing bar is arranged in Tai Monei according to design requirement；
C, after sealing sleeve, lashing guarantees sleeve tilt angle in error range on superimposed sheet baseplate reinforcing bar
Within；
D, superimposed sheet bottom plate concrete is poured and conserves, taking-up obtains superimposed sheet bottom plate ontology；
E, after superimposed sheet bottom plate ontology being transported to scene and lifted in place, joint bar is installed into sleeve, and make joint bar
Bottom end through go out sleeve after anchor into the rear pouring concrete of backbar or wall.
The opening of the upper and lower ends of sleeve is sealed using plastic foil, side form is close in sleeve lower end.It is completed when pouring
Afterwards, upper end is exposed above superimposed sheet bottom plate ontology, since the concrete layer at sleeve lower ending opening is relatively thin, is only needed when in use
It is broken using joint bar；Can also by sleeve filled and process come prevent concrete slurry flow into sleeve in.
Sleeve can use plastic material, can also use metal material (such as iron, stainless steel, aluminium alloy).Sleeve
Between spacing can be designed according to the actual loading situation of superimposed sheet bottom plate.
Embodiment 2.A kind of superimposed sheet bottom plate of end joint bar connection, is constituted as shown in Figures 4 to 7, including superimposed sheet bottom
Plate ontology 1,1 end of superimposed sheet bottom plate ontology are embedded with one group of sleeve 2, and the inclined arrangement of each sleeve 2；In the sleeve 2
Equipped with joint bar 3, and 3 bottom end of joint bar is located at the lower section of sleeve 2.Joint bar 3 pours coagulation after anchoring into backbar or wall after sleeve
In soil.
The inner wall of the sleeve 2 is smooth structure；The joint bar 3 is the connection reinforcing bar of bending structure.
Slanted angle between the sleeve 2 and the horizontal plane of superimposed sheet bottom plate ontology 1 is 20-60 degree.
Slanted angle between the sleeve 2 and the horizontal plane of superimposed sheet bottom plate ontology 1 is 45 degree.
The symmetrical end of the two of the superimposed sheet bottom plate ontology 1 is embedded with one group of sleeve 2 respectively.This is unidirectional superimposed sheet bottom plate.
4 side ends of the superimposed sheet bottom plate ontology 1 are embedded with one group of sleeve 2 respectively.This is bidirectional laminated slab bottom plate.
A kind of construction technology of the superimposed sheet bottom plate of end joint bar connection, comprising the following steps:
A, the platform mould of prefabricated superimposed sheet bottom plate is made according to design requirement；
B, superimposed sheet baseplate reinforcing bar is arranged in Tai Monei according to design requirement；
C, after sealing sleeve, lashing guarantees sleeve tilt angle in error range on superimposed sheet baseplate reinforcing bar
Within；
D, superimposed sheet bottom plate concrete is poured and conserves, taking-up obtains superimposed sheet bottom plate ontology；
E, after superimposed sheet bottom plate ontology being transported to scene and lifted in place, joint bar is installed into sleeve, and make joint bar
Bottom end through go out sleeve after anchor into the rear pouring concrete of backbar or wall.
The opening of the upper and lower ends of sleeve is sealed using plastic foil, side form is close in sleeve lower end.It is completed when pouring
Afterwards, upper end is exposed above superimposed sheet bottom plate ontology, since the concrete layer at sleeve lower ending opening is relatively thin, is only needed when in use
It is broken using joint bar；Can also by sleeve filled and process come prevent concrete slurry flow into sleeve in.
Sleeve can use plastic material, can also use metal material (such as iron, stainless steel, aluminium alloy).Sleeve
Between spacing can be designed according to the actual loading situation of superimposed sheet bottom plate.
Claims (9)
1. a kind of superimposed sheet bottom plate of end joint bar connection, it is characterised in that: including superimposed sheet bottom plate ontology (1), superimposed sheet bottom
Plate ontology (1) end is embedded with one group of sleeve (2), and each sleeve (2) inclined arrangement；Joint bar is equipped in the sleeve (2)
(3), and joint bar (3) bottom end is located at the lower section of sleeve (2).
2. a kind of superimposed sheet bottom plate of end joint bar connection according to claim 1, it is characterised in that: the sleeve (2)
Inner wall be internal thread structure.
3. a kind of superimposed sheet bottom plate of end joint bar connection according to claim 2, it is characterised in that: the joint bar (3)
Including the threaded rod (301) that the sleeve (2) with internal thread structure matches, threaded rod (301) lower end is equipped with anchor bar
(302), threaded rod (301) upper end is equipped with nut (303).
4. a kind of superimposed sheet bottom plate of end joint bar connection according to claim 1, it is characterised in that: the sleeve (2)
Inner wall be smooth structure；The joint bar (3) is the connection reinforcing bar of bending structure.
5. a kind of superimposed sheet bottom plate of end joint bar connection according to claim 1, it is characterised in that: the sleeve (2)
Slanted angle between the horizontal plane of superimposed sheet bottom plate ontology (1) is 20-60 degree.
6. a kind of superimposed sheet bottom plate of end joint bar connection according to claim 1, it is characterised in that: the sleeve (2)
Slanted angle between the horizontal plane of superimposed sheet bottom plate ontology (1) is 45 degree.
7. a kind of superimposed sheet bottom plate of end joint bar connection according to claim 1, it is characterised in that: the superimposed sheet bottom
The symmetrical end of the two of plate ontology (1) is embedded with one group of sleeve (2) respectively.
8. a kind of superimposed sheet bottom plate of end joint bar connection according to claim 1, it is characterised in that: the superimposed sheet bottom
4 side ends of plate ontology (1) are embedded with one group of sleeve (2) respectively.
9. realize a kind of construction technology of the superimposed sheet bottom plate of end joint bar connection of any of claims 1-8,
It is characterized in that, comprising the following steps:
A, the platform mould of prefabricated superimposed sheet bottom plate is made according to design requirement；
B, superimposed sheet baseplate reinforcing bar is arranged in Tai Monei according to design requirement；
C, after sealing sleeve, lashing guarantees sleeve tilt angle within the error range on superimposed sheet baseplate reinforcing bar；
D, superimposed sheet bottom plate concrete is poured and conserves, taking-up obtains superimposed sheet bottom plate ontology；
E, after superimposed sheet bottom plate ontology being transported to scene and lifted in place, joint bar is installed into sleeve, and make the bottom of joint bar
End anchors into the rear pouring concrete of backbar or wall after going out sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910343353.4A CN110080456B (en) | 2019-04-26 | 2019-04-26 | Superimposed sheet bottom plate connected by end dowel bars and construction process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910343353.4A CN110080456B (en) | 2019-04-26 | 2019-04-26 | Superimposed sheet bottom plate connected by end dowel bars and construction process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110080456A true CN110080456A (en) | 2019-08-02 |
| CN110080456B CN110080456B (en) | 2024-04-09 |
Family
ID=67417016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910343353.4A Active CN110080456B (en) | 2019-04-26 | 2019-04-26 | Superimposed sheet bottom plate connected by end dowel bars and construction process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110080456B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09268519A (en) * | 1996-01-31 | 1997-10-14 | Hitachi Zosen Corp | Joint structure of mutual constituting members in a structure |
| CN104631218A (en) * | 2014-12-25 | 2015-05-20 | 隔而固(青岛)振动控制有限公司 | Floating slab and floating track bed thereof |
| CN108265867A (en) * | 2018-03-16 | 2018-07-10 | 浙江大学建筑设计研究院有限公司 | A kind of plate end and plate side do not go out the bidirectional laminated slab bottom plate and its construction method of muscle |
| CN207959646U (en) * | 2018-03-16 | 2018-10-12 | 青岛中建联合建设工程有限公司 | Prefabricated superimposed sheet |
| CN210316188U (en) * | 2019-04-26 | 2020-04-14 | 浙江大学建筑设计研究院有限公司 | Laminated slab bottom plate connected by end inserting ribs |
-
2019
- 2019-04-26 CN CN201910343353.4A patent/CN110080456B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09268519A (en) * | 1996-01-31 | 1997-10-14 | Hitachi Zosen Corp | Joint structure of mutual constituting members in a structure |
| CN104631218A (en) * | 2014-12-25 | 2015-05-20 | 隔而固(青岛)振动控制有限公司 | Floating slab and floating track bed thereof |
| CN108265867A (en) * | 2018-03-16 | 2018-07-10 | 浙江大学建筑设计研究院有限公司 | A kind of plate end and plate side do not go out the bidirectional laminated slab bottom plate and its construction method of muscle |
| CN207959646U (en) * | 2018-03-16 | 2018-10-12 | 青岛中建联合建设工程有限公司 | Prefabricated superimposed sheet |
| CN210316188U (en) * | 2019-04-26 | 2020-04-14 | 浙江大学建筑设计研究院有限公司 | Laminated slab bottom plate connected by end inserting ribs |
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| Publication number | Publication date |
|---|---|
| CN110080456B (en) | 2024-04-09 |
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