CN112411390A - Concrete bracket for bridge deck of steel-concrete composite beam and construction method thereof - Google Patents
Concrete bracket for bridge deck of steel-concrete composite beam and construction method thereof Download PDFInfo
- Publication number
- CN112411390A CN112411390A CN202011374327.7A CN202011374327A CN112411390A CN 112411390 A CN112411390 A CN 112411390A CN 202011374327 A CN202011374327 A CN 202011374327A CN 112411390 A CN112411390 A CN 112411390A
- Authority
- CN
- China
- Prior art keywords
- concrete
- steel
- steel box
- bridge deck
- bracket
- 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.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 32
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 55
- 239000010959 steel Substances 0.000 claims abstract description 55
- 239000002023 wood Substances 0.000 claims description 26
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 7
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 7
- 241001330002 Bambuseae Species 0.000 claims description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 7
- 239000011425 bamboo Substances 0.000 claims description 7
- 239000011120 plywood Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 3
- 238000003466 welding Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000007792 addition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a concrete bracket for a bridge deck of a steel-concrete composite beam, which comprises a steel box beam and a concrete cover plate, wherein the steel box beam is arranged on the steel box beam; the steel box girder comprises a bottom surface and a curved surface positioned on the bottom surface, and the edges of the bottom surface extend upwards to the same height to form the curved surface; the curved surface of the steel box girder comprises two layers, namely an inner curved surface and an outer curved surface; the concrete cover plate covers the top of the steel box girder. The invention has the beneficial effects that: according to the concrete bracket for the bridge deck of the steel-concrete composite beam, disclosed by the invention, the bearing cross beam is utilized to support the double-pull screw rod in the construction process, and the double-pull screw rod drags the flange plate, so that a triangular bracket is omitted from being built for fixing the flange plate, welding is not required in the whole construction process, the concrete bracket is integrally formed, the construction quality is ensured, the construction is more convenient, the material of the supporting frame can be repeatedly utilized, the labor is saved, the efficiency is improved, and the quality is ensured.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a concrete bracket for a bridge deck of a steel-concrete composite beam and a construction method thereof.
Background
The steel-concrete composite beam is a beam which is formed by integrally connecting a steel beam and a concrete slab and can bear force together in a cross section. At present, the steel-concrete composite beam is widely applied to an existing road section of an upper span, and the adopted construction process basically comprises the steps of firstly hoisting a steel structure section, then supporting a bottom die by utilizing a bracket and constructing a bridge deck concrete pavement layer. In the prior construction, triangular supports are uniformly distributed on the lower sides of flange plates and are fixedly connected with side webs, and the method has more welding points, so that the later steel structure coating engineering amount is increased.
Disclosure of Invention
The application mainly aims to provide the concrete bracket for the bridge deck of the steel-concrete composite beam and the construction method thereof, wherein the concrete bracket is convenient to construct, high in material recycling rate, simple in method, less in labor and high in efficiency.
In order to achieve the above purpose, the invention provides the following technical scheme:
a concrete bracket for a bridge deck of a steel-concrete composite beam comprises a steel box beam, flange plates and a concrete cover plate;
the steel box girder comprises a bottom surface and a curved surface positioned on the bottom surface, and the edges of the bottom surface extend upwards to the same height to form the curved surface;
the curved surface of the steel box girder comprises two layers, namely an inner curved surface and an outer curved surface;
the concrete cover plate covers the top of the steel box girder.
Above-mentioned steel-concrete composite beam bridge floor concrete bracket, as an preferred embodiment, the shape of steel box girder is the cuboid form, front panel, left panel, back panel, the right panel interconnect constitution of steel box girder the curved surface of steel box girder, front panel, left panel, back panel, the right panel of steel box girder all set up to two-layerly, and the distance that is located between two panels of the same face is 30-33.5 cm.
As a preferred embodiment, the two face plates on the same face are covered with cover plates, and the cover plates are fixed with shear nails.
The arrangement of the shear nails can fix the poured concrete, the number of the shear nails is a plurality, and the shear nails are uniformly fixed on the cover plate.
As a preferred embodiment, the number of the steel-concrete composite beam bridge deck concrete bracket is a plurality of steel box beams, and the plurality of steel box beams are closely arranged along the length direction of the concrete cover plate.
In a second aspect of the present application, there is provided a construction method of a concrete bracket for a bridge deck of a steel-concrete composite beam, comprising the steps of:
(1) transporting the steel box girder to a construction area, arranging a support frame in the steel box girder, and fixing a wood board at the top end of the support frame;
(2) arranging support columns on the cover plate, fixing a bearing cross beam at the top ends of the support columns, and extending the bearing cross beam along the connecting lines of the support columns;
(3) arranging a flange plate at the position of a bridge flange, enabling one end of a double-pull screw to penetrate through the flange plate and be fixed, and enabling the other end of the double-pull screw to penetrate through a bearing cross beam and be fixed;
(4) and pouring concrete on the wood plate and the flange plate to form a concrete cover plate, and removing the support frame, the support columns, the bearing cross beams, the double-pull screw rods, the wood plate and the flange plate to obtain the concrete bracket for the bridge deck of the steel-concrete composite beam.
As a preferred embodiment, in the step (1), the support frames are arranged perpendicular to the bottom surface of the steel box girder, the number of the support frames is a plurality, and the support frames are uniformly arranged inside the steel box girder; and the support frames positioned in the same row or the same column are provided with horizontal support frames, and the horizontal support frames penetrate through the support frames positioned in the same row or the same column.
In the construction method of the concrete bracket on the bridge deck of the steel-concrete composite beam, as a preferred embodiment, in the step (1), the distance between two adjacent support frames is 0.9-1.2 m.
The top end of the support frame is fixed with a wood plate, concrete is poured on the wood plate, and the support frame is detached to form the concrete cover plate after the concrete reaches certain hardness.
As a preferred embodiment, in the step (1), a top support is arranged at the top end of the support frame, a wood block is placed in the top support, and the wood block is placed on the wood block.
In the construction method of the concrete bracket for the bridge deck of the steel-concrete composite beam, as a preferred embodiment, the surfaces of the wood board and the flange plate, which are in contact with the concrete, are covered with the bamboo plywood, and the thickness of the bamboo plywood is 10-12 mm. .
In the construction method of the concrete bracket for the bridge deck of the steel-concrete composite beam, as a preferred embodiment, the thickness of the concrete cover plate is 20-30 cm.
Compared with the prior art, the invention has the beneficial effects that: according to the concrete bracket for the bridge deck of the steel-concrete composite beam, disclosed by the invention, the bearing cross beam is utilized to support the double-pull screw rod in the construction process, and the double-pull screw rod drags the flange plate, so that a triangular bracket is omitted from being built for fixing the flange plate, welding is not required in the whole construction process, the concrete bracket is integrally formed, the construction quality is ensured, the construction is more convenient, the material of the supporting frame can be repeatedly utilized, the labor is saved, the efficiency is improved, and the quality is ensured.
Drawings
FIG. 1: the invention discloses a structural schematic diagram of a concrete bracket on a bridge deck of a steel-concrete composite beam;
FIG. 2: the invention relates to a construction schematic diagram of a concrete bracket for a bridge deck of a steel-concrete composite beam;
in the figure: 1. a steel box girder; 2. a concrete cover plate; 3. a cover plate; 4. shear nails; 5. a support frame; 6. a support pillar; 7. a load-bearing beam; 8. a flange plate; 9. double-pull screw rod; 10. a horizontal support frame; 11. jacking; 12. wood blocks; 13. a wood board; 14. bamboo plywood.
Detailed Description
In order to make the technical solutions in the embodiments of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to examples, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1
A concrete bracket for a bridge deck of a steel-concrete composite beam comprises a steel box beam 1 and a concrete cover plate 2;
the steel box girder 1 comprises a bottom surface and a curved surface positioned on the bottom surface, and the edges of the bottom surface extend upwards to the same height to form the curved surface;
the curved surface of the steel box girder 1 comprises two layers, namely an inner curved surface and an outer curved surface;
the concrete cover plate 2 covers the top of the steel box girder 1.
The construction method of the concrete bracket on the bridge deck of the steel-concrete composite beam comprises the following steps:
(1) the method comprises the following steps of conveying a steel box girder 1 to a construction area, arranging support frames 5 in the steel box girder 1, wherein the support frames 5 are perpendicular to the bottom surface of the steel box girder 1, the number of the support frames 5 is multiple, and the support frames 5 are uniformly arranged in the steel box girder 1; the supporting frames 5 in the same row or the same column are provided with horizontal supporting frames 10, the horizontal supporting frames 10 penetrate through the supporting frames 5 in the same row or the same column, the distance between every two adjacent supporting frames 5 can be 0.9m, 1m or 1.2m, the top ends of the supporting frames 5 are provided with jacking supports 11, wood blocks 12 are placed in the jacking supports 11, and wood boards 13 are placed on the wood blocks 12; the supporting frames 5 are uniformly distributed in the steel box girder 1, so that the wood boards 13 are supported and fixed, and the wood boards 13 are covered above the bottom surface of the steel box girder 1;
(2) two panels on the same surface are covered with a cover plate 3, a shear nail 4 is fixed on the cover plate 3, a support column 6 is arranged on the cover plate 3, a bearing beam 7 is fixed at the top end of the support column 6, and the bearing beam 7 extends along the connecting line of the support columns 6; because the number of the steel box girders 1 is a plurality, the steel box girders are closely arranged along the length direction of the concrete cover plate, the support columns 6 are arranged on the cover plate 3 of the steel box girder 1, namely a plurality of support columns 6 are correspondingly arranged, and the connecting lines of the support columns 6 are in a straight line;
(3) arranging a flange plate 8 at the position of a bridge flange, enabling one end of a double-pull screw rod 9 to penetrate through the flange plate 8 and be fixed, and enabling the other end of the double-pull screw rod 9 to penetrate through a bearing cross beam 7 and be fixed;
(4) pouring concrete on the wood board 13 and the flange plate 8 to form a concrete cover plate 2 with the thickness of 20cm, 25cm or 30cm, as a preferable scheme, covering the surfaces of the wood board 13 and the flange plate 8, which are contacted with the concrete, with bamboo rubber plates 14, wherein the thickness of the bamboo rubber plates 14 can be 10mm, 11mm or 12mm, and detaching the support frame 5, the support column 6, the bearing cross beam 7, the double-pull screw rods 9, the wood board 13 and the flange plate 8 to obtain the concrete bracket for the bridge floor of the steel-concrete composite beam.
Example 2
As a preferred embodiment, the steel box girder 1 is rectangular, the front panel, the left panel, the rear panel and the right panel of the steel box girder 1 are connected with each other to form the curved surface of the steel box girder 1, the front panel, the left panel, the rear panel and the right panel of the steel box girder 1 are arranged in two layers, and the distance between the two panels on the same plane may be 30cm, 32cm or 33.5 cm.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and additions can be made without departing from the method of the present invention, and these modifications and additions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A concrete bracket for a bridge deck of a steel-concrete composite beam is characterized by comprising a steel box beam and a concrete cover plate;
the steel box girder comprises a bottom surface and a curved surface positioned on the bottom surface, and the edges of the bottom surface extend upwards to the same height to form the curved surface;
the curved surface of the steel box girder comprises two layers, namely an inner curved surface and an outer curved surface;
the concrete cover plate covers the top of the steel box girder.
2. The concrete bracket for steel-concrete composite beam bridge deck according to claim 1, wherein the steel box girder is rectangular, the front panel, the left panel, the rear panel and the right panel of the steel box girder are connected with each other to form a curved surface of the steel box girder, the front panel, the left panel, the rear panel and the right panel of the steel box girder are arranged in two layers, and the distance between the two panels on the same plane is 30-33.5 cm.
3. The concrete-filled steel-concrete composite beam bridge deck concrete bracket according to claim 2, wherein cover plates are covered on two face plates on the same face, and shear nails are fixed on the cover plates.
4. The concrete-filled bridge deck concrete bracket according to claim 3, wherein the number of the steel box girders is several, and the several steel box girders are closely arranged along the length direction of the concrete cover plate.
5. A construction method of a concrete bracket for a bridge deck of a steel-concrete composite beam as recited in any one of claims 1 to 4, comprising the steps of:
(1) transporting the steel box girder to a construction area, arranging a support frame in the steel box girder, and fixing a wood board at the top end of the support frame;
(2) arranging support columns on the cover plate, fixing a bearing cross beam at the top ends of the support columns, and extending the bearing cross beam along the connecting lines of the support columns;
(3) arranging a flange plate at the position of a bridge flange, enabling one end of a double-pull screw to penetrate through the flange plate and be fixed, and enabling the other end of the double-pull screw to penetrate through a bearing cross beam and be fixed;
(4) and pouring concrete on the wood plate and the flange plate to form a concrete cover plate, and removing the support frame, the support columns, the bearing cross beams, the double-pull screw rods, the wood plate and the flange plate to obtain the concrete bracket for the bridge deck of the steel-concrete composite beam.
6. The construction method of the concrete bracket for the bridge deck of the steel-concrete composite beam as claimed in claim 5, wherein in the step (1), the support frames are arranged perpendicular to the bottom surface of the steel box beam, the number of the support frames is a plurality, and the support frames are uniformly arranged inside the steel box beam; and the support frames positioned in the same row or the same column are provided with horizontal support frames, and the horizontal support frames penetrate through the support frames positioned in the same row or the same column.
7. The construction method of the concrete bracket for the bridge deck of the steel-concrete composite beam as claimed in claim 6, wherein in the step (1), the distance between two adjacent support frames is 0.9-1.2 m.
8. The construction method of the concrete bracket for the bridge deck of the steel-concrete composite beam as claimed in claim 7, wherein in the step (1), a top support is arranged at the top end of the supporting frame, a wood block is placed in the top support, and the wood block is placed on the wood block.
9. The construction method of the concrete bracket for the bridge deck of the steel-concrete composite beam as claimed in claim 8, wherein the surfaces of the wood boards and the flange plates, which are in contact with the concrete, are covered with bamboo plywood, and the thickness of the bamboo plywood is 10-12 mm.
10. The construction method of the concrete-filled steel-concrete composite beam bridge deck concrete bracket according to claim 9, wherein the thickness of the concrete cover plate is 20-30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011374327.7A CN112411390A (en) | 2020-11-30 | 2020-11-30 | Concrete bracket for bridge deck of steel-concrete composite beam and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011374327.7A CN112411390A (en) | 2020-11-30 | 2020-11-30 | Concrete bracket for bridge deck of steel-concrete composite beam and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112411390A true CN112411390A (en) | 2021-02-26 |
Family
ID=74828899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011374327.7A Pending CN112411390A (en) | 2020-11-30 | 2020-11-30 | Concrete bracket for bridge deck of steel-concrete composite beam and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112411390A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235438A (en) * | 2021-05-18 | 2021-08-10 | 中交第二航务工程局有限公司 | Pouring construction tool and construction method for steel-concrete composite beam bridge deck |
| CN113863140A (en) * | 2021-09-02 | 2021-12-31 | 武汉二航路桥特种工程有限责任公司 | Steel-concrete composite beam suitable for integral carrying installation and construction method thereof |
| CN114232502A (en) * | 2022-01-18 | 2022-03-25 | 中铁十四局集团第三工程有限公司 | Self-propelled sliding formwork truss and using method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120034507A (en) * | 2010-10-01 | 2012-04-12 | 김은하 | Reinforced concrete beam not using tendon and bridge construction method using the same |
| CN103362069A (en) * | 2013-07-31 | 2013-10-23 | 中铁六局集团有限公司 | Steel and concrete combined box girder concrete wing plate formwork and construction method |
| CN205153316U (en) * | 2015-10-10 | 2016-04-13 | 中国十九冶集团有限公司南京分公司 | A steel case roof beam that is used for space curved surface rack crooked |
| CN207484300U (en) * | 2017-11-21 | 2018-06-12 | 中交二航局第二工程有限公司 | Steel box-girder flange plate cast-in-place formwork structure |
| CN109610289A (en) * | 2018-12-21 | 2019-04-12 | 中冶天工集团有限公司 | A kind of production method of hyperboloid steel box-girder moulding bed |
| CN214219394U (en) * | 2020-11-30 | 2021-09-17 | 中交路桥建设有限公司 | Concrete bracket for bridge deck of steel-concrete composite beam |
-
2020
- 2020-11-30 CN CN202011374327.7A patent/CN112411390A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120034507A (en) * | 2010-10-01 | 2012-04-12 | 김은하 | Reinforced concrete beam not using tendon and bridge construction method using the same |
| CN103362069A (en) * | 2013-07-31 | 2013-10-23 | 中铁六局集团有限公司 | Steel and concrete combined box girder concrete wing plate formwork and construction method |
| CN205153316U (en) * | 2015-10-10 | 2016-04-13 | 中国十九冶集团有限公司南京分公司 | A steel case roof beam that is used for space curved surface rack crooked |
| CN207484300U (en) * | 2017-11-21 | 2018-06-12 | 中交二航局第二工程有限公司 | Steel box-girder flange plate cast-in-place formwork structure |
| CN109610289A (en) * | 2018-12-21 | 2019-04-12 | 中冶天工集团有限公司 | A kind of production method of hyperboloid steel box-girder moulding bed |
| CN214219394U (en) * | 2020-11-30 | 2021-09-17 | 中交路桥建设有限公司 | Concrete bracket for bridge deck of steel-concrete composite beam |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235438A (en) * | 2021-05-18 | 2021-08-10 | 中交第二航务工程局有限公司 | Pouring construction tool and construction method for steel-concrete composite beam bridge deck |
| CN113863140A (en) * | 2021-09-02 | 2021-12-31 | 武汉二航路桥特种工程有限责任公司 | Steel-concrete composite beam suitable for integral carrying installation and construction method thereof |
| CN114232502A (en) * | 2022-01-18 | 2022-03-25 | 中铁十四局集团第三工程有限公司 | Self-propelled sliding formwork truss and using method thereof |
| CN114232502B (en) * | 2022-01-18 | 2023-09-29 | 中铁十四局集团第三工程有限公司 | Self-propelled sliding template truss and use method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112411390A (en) | Concrete bracket for bridge deck of steel-concrete composite beam and construction method thereof | |
| WO2015131334A1 (en) | Building structure and construction method for same | |
| CN214219394U (en) | Concrete bracket for bridge deck of steel-concrete composite beam | |
| CN103194982B (en) | Construction method for short cantilever support at bridge side span cast-in-situ segment | |
| CN105064720A (en) | Self-supporting steel bar truss floor support plate support structure | |
| CN212956151U (en) | Cast-in-place beam flange plate template system | |
| CN112854577A (en) | Self-formwork-supporting cast-in-place floor and construction method thereof | |
| CN218933561U (en) | Structure for preventing continuous overhanging layer of building from displacement | |
| CN107012985A (en) | A kind of prefabricated girder and the laminated floor slab construction technology containing the prefabricated girder | |
| CN110952457A (en) | Steel plate combined beam bridge support-free cast-in-place concrete device and construction method | |
| CN212248837U (en) | Bidirectional hollow composite floor slab, slab joint structure and connection structure with frame beam column | |
| CN210177768U (en) | Assembly type composite structure dense rib floor | |
| CN216713527U (en) | Assembled plane superstructure | |
| CN114263303B (en) | Building cover construction method for assembled building and assembled planar building cover | |
| CN219032946U (en) | Temporary supporting structure for prefabricated small box girder type hidden cover girder | |
| CN214696425U (en) | Spherical precast concrete superimposed sheet | |
| CN115928883B (en) | Structure structure for preventing displacement of continuous overhanging layer of building and construction method | |
| CN215978445U (en) | Arch grid beam-shaped fabricated structure formwork | |
| CN211498477U (en) | Steel plate combined beam bridge structure with dismantling-free template | |
| CN110205936B (en) | Arc-shaped stepped cable tower beam side template and construction method thereof | |
| CN216075816U (en) | Light steel keel framework concrete composite floor slab bottom plate | |
| CN215038576U (en) | Combined type steel pedestal module unit structure suitable for different precast beam sizes | |
| CN220928371U (en) | Beam-slab integrated steel-concrete combined structure | |
| CN215907395U (en) | Support-free formwork structure suitable for steel frame and cast-in-place concrete floor slab combined structure | |
| CN217205311U (en) | Construction device for floor support plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |