CN114575511A - Prefabricated floor system for thick plate conversion - Google Patents
Prefabricated floor system for thick plate conversion Download PDFInfo
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- CN114575511A CN114575511A CN202210244679.3A CN202210244679A CN114575511A CN 114575511 A CN114575511 A CN 114575511A CN 202210244679 A CN202210244679 A CN 202210244679A CN 114575511 A CN114575511 A CN 114575511A
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- reinforced concrete
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- prefabricated reinforced
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 10
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 55
- 239000004567 concrete Substances 0.000 claims abstract description 14
- 230000002787 reinforcement Effects 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 51
- 239000010959 steel Substances 0.000 claims description 51
- 239000011178 precast concrete Substances 0.000 claims description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000009415 formwork Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/14—Load-carrying floor structures formed substantially of prefabricated units with beams or girders laid in two directions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a prefabricated floor system for thick plate conversion. The internal reinforcement of the existing thick plate is complex, a weak part is easy to form during pouring, and a large amount of construction time is consumed for formwork support and demoulding. The invention comprises a plurality of reinforced concrete columns and reinforced concrete beams, wherein the reinforced concrete columns are connected through the reinforced concrete beams by bolts; a thick plate is arranged in a closed area formed by the reinforced concrete beam and the reinforced concrete column; the thick plate is connected with the reinforced concrete beam through a bolt connecting piece. In the invention, all parts are connected through bolts to form a strong joint, and an integral stressed part is formed through cast-in-place concrete, and a plate-beam-column force transmission mechanism is formed in a thick plate, so that the anti-seismic performance of the structure is improved; the process of formwork supporting and demoulding is omitted, the construction period is shortened, the cost is saved, and the construction pollution is reduced.
Description
Technical Field
The invention belongs to the technical field of building engineering, and particularly relates to a prefabricated floor system for thick plate conversion.
Background
The problems of large land demand of the rail transit vehicle section, shortage of urban land resources and the like enable the development mode of the upper cover property of the subway vehicle section to become a necessary trend of intensive utilization of urban land, and the development mode is also one of key works of the rail transit industry at present and in the future. Generally speaking, the development modes of the upper cover and the lower cover are greatly different, the track and the parking garage are arranged under the cover, the house or the office building is arranged on the upper cover, the upper axle net and the lower axle net are staggered more, and the full-frame shear wall thick plate conversion structure is popular in the development mode due to the advantages of flexible arrangement of the upper structure plane and the like. However, the reinforcing bars in the thick plate are complex, generally three layers of three-dimensional reinforcing bars are arranged, and in addition, a hidden beam with a large size is arranged in the plate to connect the frame columns, so that more reinforcing bars are arranged at the nodes, the requirement on the site construction process is high, and concrete at the nodes is easy to vibrate and not compact when cast in site, so that weak parts are formed. In addition, because the thick plate has large volume, the formwork support and the demoulding are huge projects, which not only consumes a large amount of construction time but also is not economical, and also does not meet the requirement of green buildings.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides the prefabricated floor system for thick plate conversion, which has high anti-seismic performance, simple construction and short period and is beneficial to saving the cost.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a prefabricated floor system for thick plate conversion comprises a plurality of prefabricated reinforced concrete columns and prefabricated reinforced concrete beams; the prefabricated reinforced concrete columns are connected through prefabricated reinforced concrete beams; a thick plate is arranged in a closed area formed by the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column;
the prefabricated reinforced concrete column is formed by connecting 4 first connecting steel plates into a square shape, a groove-shaped connecting piece is welded on the outer side of each first connecting steel plate, and a first bolt hole is formed in each groove-shaped connecting piece; binding the prefabricated column longitudinal bars and the prefabricated column hoop bars, welding the prefabricated column longitudinal bars and the first connecting steel plates, and pouring concrete to form an integral stress piece;
the prefabricated reinforced concrete beam comprises two second connecting steel plates, the second connecting steel plates are U-shaped, T-shaped connecting pieces are welded on the second connecting steel plates, and second bolt holes are formed in the T-shaped connecting pieces; after being bound, the precast beam longitudinal reinforcements and the precast beam stirrups form a reinforcement cage, two ends of the reinforcement cage are respectively welded with the second connecting steel plates, a plurality of connecting screw rods are fixedly connected to the reinforcement cage, and an integral stress piece is formed by pouring concrete;
the T-shaped connecting piece is arranged in the groove-shaped connecting piece, and the prefabricated reinforced concrete column is connected with the prefabricated reinforced concrete beam through a first bolt and a first nut; a thick plate is arranged in a closed area formed by the prefabricated reinforced concrete beam and the prefabricated reinforced concrete column;
the thick plate comprises a precast concrete plate, a bottom first direction plate rib and a bottom second direction plate rib are embedded in the precast concrete plate, and the bottom first direction plate rib and the bottom second direction plate rib are bound to form a bottom reinforcing mesh; the embedded second bolt is arranged in the precast concrete plate and is welded and connected with the bottom reinforcing mesh; the bottom ends of the first-direction vertical embedded steel bars and the second-direction vertical embedded steel bars are embedded in the precast concrete plate and are respectively connected with the bottom first-direction plate ribs and the bottom second-direction plate ribs in a welding mode; the top ends of the first-direction vertical embedded steel bars and the second-direction vertical embedded steel bars are fixedly connected with the top first-direction plate bars and the top second-direction plate bars respectively, and the top first-direction plate bars and the top second-direction plate bars are bound to form a top steel bar mesh;
the thick plate is fixedly connected with the precast reinforced concrete beam through an L-shaped connecting piece, a connecting screw rod, a pre-embedded second bolt and a second nut, and an integral stress piece is formed through a thick plate cast-in-place part; and a third bolt hole and a fourth bolt hole are formed in the L-shaped connecting piece.
Optimally, the first-direction vertical embedded steel bars and the second-direction vertical embedded steel bars are ribbed steel bars;
optimally, a first limiting plate is arranged below the groove-shaped connecting piece;
the invention has the beneficial effects that:
1) all the components are connected through bolts to form strong joints, and meanwhile, a definite plate-beam-column force transmission mechanism is formed in the thick plate, so that the anti-seismic performance of the structure is improved;
2) according to the invention, the precast beam, the precast column and the concrete slab are all precast components, are connected by using the bolts, and form an integral stressed part by casting concrete on site, so that the problem of incompact concrete vibration caused by dense reinforcement at nodes in the existing structure is solved, and unfavorable weak parts are avoided;
3) the invention utilizes the precast concrete board as the bottom board of the cast-in-place part, omits the processes of formwork support and demoulding, effectively shortens the construction period, saves the cost and reduces the construction pollution.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a prefabricated column structure;
FIG. 3 is a schematic view of the connection of steel plates and steel bars inside the prefabricated column;
FIG. 4 is a schematic view of a precast beam structure;
FIG. 5 is a schematic view of connection of reinforcing steel bars, steel plates and screws inside a precast beam;
FIG. 6 is a schematic cross-sectional view of a plank;
FIG. 7 is a schematic view of an L-shaped connector;
FIG. 8 is a schematic view of a connecting bolt;
FIG. 9 is a schematic view of the top rebar;
in the figure, 1-precast reinforced concrete column, 2-first connecting steel plate, 3-groove type connecting piece, 4-first bolt hole, 5-first limiting plate, 6-precast column longitudinal bar, 7-precast column stirrup, 8-first bolt, 9-first nut, 10-precast reinforced concrete beam, 11-second connecting steel plate, 12-T type connecting piece, 13-second bolt hole, 14-connecting screw, 15-precast beam longitudinal bar, 16-precast beam stirrup, 17-L type connecting piece, 18-second nut, 19-third bolt hole, 20-fourth bolt hole, 21-precast concrete plate, 22-bottom first direction plate bar, 23-bottom second direction plate bar, 24-embedded second bolt, 25-first direction embedded vertical reinforced concrete plate, 26-vertical embedded steel bars in the second direction, 27-thick plate cast-in-place parts, 28-first direction plate bars at the top and 29-second direction plate bars at the top.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
As shown in fig. 1, the present invention includes a plurality of prefabricated reinforced concrete columns 1 and prefabricated reinforced concrete beams 10; the prefabricated reinforced concrete columns 1 are connected through prefabricated reinforced concrete beams 10 to form a square structure, and the specific structure is selected according to design requirements; a thick plate is arranged in a closed area formed by the prefabricated reinforced concrete beam 10 and the prefabricated reinforced concrete column 1;
as shown in fig. 2 and 3, the prefabricated reinforced concrete column 1 is formed by connecting 4 first connecting steel plates 2 into a square shape, a groove-shaped connecting piece 3 is welded on the outer side of each first connecting steel plate 2, and a first bolt hole 4 is formed in each groove-shaped connecting piece 3; a first limiting plate 5 is arranged below the groove-shaped connecting piece 3 and used for realizing connection with the precast reinforced concrete beam 10 and positioning during installation; the prefabricated column longitudinal bars 6 and the prefabricated column stirrups 7 are bound and then welded with the first connecting steel plates 2, so that the force transmission in the prefabricated reinforced concrete column 1 is realized, and finally, the whole stress piece is formed by pouring concrete;
as shown in fig. 4 and 5, the precast reinforced concrete beam 10 includes two second connection steel plates 11, the second connection steel plates 11 are U-shaped, T-shaped connection members 12 are welded to the second connection steel plates 11, and second bolt holes 13 are formed in the T-shaped connection members 12; the precast beam longitudinal ribs 15 and the precast beam stirrups 16 are bound to form a reinforcement cage, two ends of the reinforcement cage are respectively welded with the second connecting steel plates 11, a plurality of connecting screw rods 14 are fixedly connected to the reinforcement cage, and an integral stress piece is formed by pouring concrete;
the T-shaped connecting pieces 12 are arranged in the groove-shaped connecting pieces 3, the prefabricated reinforced concrete columns 1 are connected with the prefabricated reinforced concrete beams 10 through the first bolts 8 and the first nuts 9, strong joints are formed, the anti-seismic performance of the structure is improved, the effective transmission of force between the beams and the columns is guaranteed, and the number of the T-shaped connecting pieces depends on the design; the connecting bolt is schematically shown in FIG. 8;
a thick plate is arranged in a closed area formed by the prefabricated reinforced concrete beam 10 and the prefabricated reinforced concrete column 1;
as shown in fig. 6, the thick slab comprises a precast concrete slab 21, a bottom first-direction plate rib 22 and a bottom second-direction plate rib 23 are embedded in the precast concrete slab 21, and the bottom first-direction plate rib 22 and the bottom second-direction plate rib 23 are bound to form a bottom reinforcing mesh to bear the bending moment of the bottom of the precast concrete slab 21;
the embedded second bolt 24 is arranged in the precast concrete plate 21 and is connected with the bottom reinforcing mesh in a welding way; the bottom ends of the first-direction vertical embedded steel bars 25 and the second-direction vertical embedded steel bars 26 are embedded in the precast concrete plate 21, and the bottom parts of the first-direction vertical embedded steel bars and the second-direction vertical embedded steel bars are horizontally bent and then are respectively welded with the bottom first-direction plate ribs 22 and the bottom second-direction plate ribs 23, so that the transverse shear force in the thick plate can be effectively borne;
the top ends of the first-direction vertical embedded bars 25 and the second-direction vertical embedded bars 26 are fixedly connected with the top first-direction plate bars 28 and the top second-direction plate bars 29 respectively in a hook mode, and the top first-direction plate bars 28 and the top second-direction plate bars 29 are bound to form a top reinforcing mesh, as shown in fig. 9;
the thick plate is fixedly connected with the precast reinforced concrete beam 10 through an L-shaped connecting piece 17, a connecting screw 14, a pre-embedded second bolt 24 and a second nut 18, and an integral stress piece is formed through a thick plate cast-in-place part 27; the L-shaped connecting piece 17 is provided with a third bolt hole 19 and a fourth bolt hole 20, as shown in FIG. 7;
the first-direction vertical embedded steel bars 25 and the second-direction vertical embedded steel bars 26 are ribbed steel bars and can be effectively bonded with cast-in-place concrete, so that the precast concrete plate 21 and the thick plate cast-in-place part 27 form a whole.
The construction method comprises the following steps:
the prefabricated reinforced concrete beam 10, the prefabricated reinforced concrete column 1 and the bottom plate are all prefabricated components, and the prefabricated components are transported to a field for installation after being prefabricated in a factory. Firstly, connecting a prefabricated reinforced concrete column 1 with a prefabricated reinforced concrete beam 10, aligning a T-shaped connecting piece 12 with a first bolt hole 4 and a second bolt hole 13 on the side surface of a groove-shaped connecting piece 3, and fixing by a first bolt 8 and a first nut 9; the first limiting plate 5 plays a role in aligning the position when the precast reinforced concrete beam 10 is installed.
And hoisting the precast concrete plate 21, connecting the precast concrete plate with the precast reinforced concrete beam 10 through an L-shaped connecting piece 17, wherein one end of the L-shaped connecting piece 17 penetrates through the connecting screw rod 14, and the other end of the L-shaped connecting piece penetrates through the embedded second bolt 24 and is fixed by the second nut 18. Place top first direction slab muscle 28 and top second direction slab muscle 29, the ligature connection to catch on top slab muscle 28, 29 with the crotch on vertical embedded steel bar 25, 26 top, vertical embedded steel bar ribbed is favorable to the bonding of concrete and reinforcing bar, pours board cast in situ concrete part 27.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "mounted," "connected," and "secured" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integral to; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (3)
1. A prefabricated floor system for slab conversion, characterized in that: comprises a plurality of prefabricated reinforced concrete columns (1) and prefabricated reinforced concrete beams (10); the prefabricated reinforced concrete columns (1) are connected through prefabricated reinforced concrete beams (10); a thick plate is arranged in a closed area formed by the prefabricated reinforced concrete beam (10) and the prefabricated reinforced concrete column (1);
the prefabricated reinforced concrete column (1) is connected into a square shape by 4 first connecting steel plates (2), a groove-shaped connecting piece (3) is welded on the outer side of each first connecting steel plate (2), and a first bolt hole (4) is formed in each groove-shaped connecting piece (3); the prefabricated column longitudinal bars (6) are bound with the prefabricated column stirrups (7) and then are welded with the first connecting steel plate (2), and an integral stress piece is formed by pouring concrete;
the prefabricated reinforced concrete beam (10) comprises two second connecting steel plates (11), the second connecting steel plates (11) are U-shaped, T-shaped connecting pieces (12) are welded on the second connecting steel plates (11), and second bolt holes (13) are formed in the T-shaped connecting pieces (12); the precast beam longitudinal bars (15) and the precast beam stirrups (16) are bound to form a reinforcement cage, two ends of the reinforcement cage are respectively welded with the second connecting steel plates (11), the reinforcement cage is fixedly connected with a plurality of connecting screw rods (14), and an integral stress piece is formed by pouring concrete;
the T-shaped connecting piece (12) is arranged in the groove-shaped connecting piece (3), and the prefabricated reinforced concrete column (1) is connected with the prefabricated reinforced concrete beam (10) through a first bolt (8) and a first nut (9);
the thick plate comprises a precast concrete plate (21), a bottom first direction plate rib (22) and a bottom second direction plate rib (23) are embedded in the precast concrete plate (21), and the bottom first direction plate rib (22) and the bottom second direction plate rib (23) are bound to form a bottom reinforcing mesh; the embedded second bolts (24) are arranged in the precast concrete plate (21) and are connected with the bottom reinforcing mesh in a welding way; the bottom ends of the first-direction vertical embedded steel bars (25) and the second-direction vertical embedded steel bars (26) are embedded in the precast concrete slab (21) and are respectively welded with the bottom first-direction plate bars (22) and the bottom second-direction plate bars (23); the top ends of the first-direction vertical embedded steel bars (25) and the second-direction vertical embedded steel bars (26) are fixedly connected with the top first-direction plate bars (28) and the top second-direction plate bars (29) respectively, and the top first-direction plate bars (28) and the top second-direction plate bars (29) are bound to form a top reinforcing mesh;
the thick plate is fixedly connected with the precast reinforced concrete beam (10) through an L-shaped connecting piece (17), a connecting screw rod (14), a pre-embedded second bolt (24) and a second screw cap (18), and an integral stress piece is formed through a thick plate cast-in-place part (27); the L-shaped connecting piece (17) is provided with a third bolt hole (19) and a fourth bolt hole (20).
2. A prefabricated floor system for slab conversion according to claim 1, characterized in that: the first-direction vertical embedded steel bars (25) and the second-direction vertical embedded steel bars (26) are all ribbed steel bars.
3. A prefabricated floor system for slab conversion according to claim 2, characterized in that: and a first limiting plate (5) is arranged below the groove-shaped connecting piece (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210244679.3A CN114575511B (en) | 2022-03-11 | 2022-03-11 | Prefabricated floor system for thick plate conversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210244679.3A CN114575511B (en) | 2022-03-11 | 2022-03-11 | Prefabricated floor system for thick plate conversion |
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| Publication Number | Publication Date |
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| CN114575511A true CN114575511A (en) | 2022-06-03 |
| CN114575511B CN114575511B (en) | 2024-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210244679.3A Active CN114575511B (en) | 2022-03-11 | 2022-03-11 | Prefabricated floor system for thick plate conversion |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233813A (en) * | 2022-07-12 | 2022-10-25 | 中冶赛迪工程技术股份有限公司 | Beam with clamping connection plate |
| CN115369999A (en) * | 2022-07-12 | 2022-11-22 | 中冶赛迪工程技术股份有限公司 | Beam with welded connection plate |
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| KR102371456B1 (en) * | 2021-06-02 | 2022-03-07 | 서울시립대학교 산학협력단 | Repairable PC connection for plant pipe-rack structure and construction method thereof |
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2022
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| JP2009249900A (en) * | 2008-04-04 | 2009-10-29 | Takenaka Komuten Co Ltd | Precast concrete beam member, and laminated beam |
| CN209277537U (en) * | 2018-09-28 | 2019-08-20 | 佛山建装建筑科技有限公司 | A kind of assembled support construction |
| CN109138151A (en) * | 2018-09-30 | 2019-01-04 | 华南理工大学 | A kind of assembled architecture full-dry method construction concrete frame structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233813A (en) * | 2022-07-12 | 2022-10-25 | 中冶赛迪工程技术股份有限公司 | Beam with clamping connection plate |
| CN115369999A (en) * | 2022-07-12 | 2022-11-22 | 中冶赛迪工程技术股份有限公司 | Beam with welded connection plate |
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| Publication number | Publication date |
|---|---|
| CN114575511B (en) | 2024-10-01 |
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