CN107190853A - Heavy wall insertion node square hollow section steel component framework system and its construction method - Google Patents
Heavy wall insertion node square hollow section steel component framework system and its construction method Download PDFInfo
- Publication number
- CN107190853A CN107190853A CN201710476538.3A CN201710476538A CN107190853A CN 107190853 A CN107190853 A CN 107190853A CN 201710476538 A CN201710476538 A CN 201710476538A CN 107190853 A CN107190853 A CN 107190853A
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- steel
- box
- casing
- girder
- heavy wall
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 332
- 239000010959 steel Substances 0.000 title claims abstract description 332
- 238000003780 insertion Methods 0.000 title claims abstract description 51
- 230000037431 insertion Effects 0.000 title claims abstract description 51
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 238000003466 welding Methods 0.000 claims abstract description 27
- 238000011065 in-situ storage Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
Classifications
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2415—Brackets, gussets, joining plates
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2418—Details of bolting
Abstract
The invention discloses a kind of heavy wall insertion node square hollow section steel component framework system and its construction method, frame system includes Steel Thin-Wall square tube, heavy wall insertion box steel column node and girder steel；Wherein, heavy wall insertion box steel column node includes casing, liner stiffened steel plates and girder steel connector, and casing up/down perforation is set, the upper and lower ends of casing respectively with Steel Thin-Wall square tube butt welding, box steel column main body is spliced into, the wall thickness of casing is more than the wall thickness of Steel Thin-Wall square tube；Liner stiffened steel plates are identical with box house section, and the inwall in embedded casing with casing is welded and fixed；The side outer wall of casing is welded with two, three or four girder steel connectors according to correspondence box steel column main body position, and girder steel is fixedly connected with girder steel connector, and adjacent box steel column main body is linked to be into frame structure.The present invention has the advantages that the process-cycle is short, assembled in situ speed soon, labor and material saving, environmental protection, cost is reduced, while meeting node strength and Seismic Design Requirements.
Description
Technical field
The present invention relates to a kind of heavy wall insertion node square hollow section steel component framework system and its construction method, belong to steel construction dress
With formula building field.
Background technology
With attention and popularization of the assembled architecture by country, assembled architecture will further be developed and apply.
And steel construction assembled architecture is one of them important system, steel column, the steel framework of girder steel composition in steel construction assembled architecture
Frame is the core in its system.
Existing box steel column frame system design processing can be divided into two kinds：One kind directly welds steel using finished steel square tube
Bracket or junction steel plate make the frame system of steel column, are generally used in small span low-rise steel-frame structure.Due to node of column and beam
Position can not weld insertion lining steel plate, to reach that node location is added requirement, it has to increase the wall thickness of whole steel square tube, into
And increase whole steel column steel using amount.Another use hot rolled steel plate cuts into four blocks of battens, node location welding insertion inner lining steel
Plate, then carry out the frame system that human weld constitutes body structure steel column.Such a structure is most widely used at present.Such a box-shaped
Though steel column can solve the problems, such as node location stress, processing and fabricating complex procedures, cycle length, labour cost are high, not a node position
Steel casing does not reduce steel using amount because stress is small, and cost is high.
The content of the invention
Present invention solves the technical problem that being：There is provided one for the drawbacks described above existed for existing steel member frame system
Heavy wall insertion node square hollow section steel component framework system and its construction method are planted, above and below heavy wall insertion node square tube box steel column
Butt welding, and girder steel connection, form whole building frame system.
The present invention specifically adopts the following technical scheme that realization：
Heavy wall insertion node square hollow section steel component framework system, including Steel Thin-Wall square tube, heavy wall insertion box steel column node and
Girder steel；
Wherein, the heavy wall insertion box steel column node includes casing, liner stiffened steel plates and girder steel connector, the case
Body up/down perforation is set, the upper and lower ends of casing respectively with Steel Thin-Wall square tube butt welding, be spliced into box steel column main body, it is described
The wall thickness of casing is 1.1-2 times of Steel Thin-Wall square tube；The liner stiffened steel plates are identical with box house section, and embedded casing
The interior inwall with casing is welded and fixed；
The side outer wall of the casing is welded with two, three or four according to correspondence box steel column main body position
Individual girder steel connector, the girder steel is fixedly connected with girder steel connector, and adjacent box steel column main body is linked to be into frame structure.
As a preferred embodiment of the present invention, the girder steel connector includes vertical junction steel plate.
As another preferred scheme of the present invention, the girder steel connector includes vertical steel corbel web and steel corbel
The steel corbel wing plate that side is welded above and below web.
In above two scheme, institute's liner stiffened steel plates are at least two pieces, wherein two pieces respectively with junction steel plate
Or the alignment of side up and down of steel corbel web, form the continuous stress surface of insertion with two sides of girder steel connector.
Further, the casing is the steel casing that finished product heavy wall steel square tube or steel plate are welded into.
Further, the Steel Thin-Wall square tube is finished steel square tube.
Further, the girder steel is the H-shaped steel member or finished product H-shaped steel member that hot rolled steel plate is processed into, the girder steel
Two ends are provided with girder steel connector is used for the bolt hole that bolt is fixedly connected.
In the heavy wall insertion node square hollow section steel component framework system of the present invention, the box steel column main body includes at least two
Section Steel Thin-Wall square tube and a heavy wall insertion box steel column node splicing, at least four box steel column main bodys are linked to be frame by girder steel
Frame structure.
Further, the Steel Thin-Wall square tube bottom welding of the box steel column main body bottom is provided with fixes with foundation ground
The post bottom steel plate of anchoring, welding is provided with post bottom stiffened steel plates between post bottom steel plate and Steel Thin-Wall square tube.
The invention also discloses a kind of construction this method of above-mentioned heavy wall insertion node square hollow section steel component framework system, including
Following steps：
A, elder generation process box steel column main body and girder steel in factory, are transported to erecting yard；
When B, assembled in situ, first filling first layer has the box steel column main body of post bottom steel plate, by pre-buried earth anchor and nut with
Basis is fixedly connected；
C, girder steel between first layer box steel column is reassembled, girder steel is used with the girder steel connector on first layer box steel column
High-strength bolt is connected, and forms first layer framework；
D, by above and below the heavy wall insertion box steel column node of second layer box steel column main body and first layer box steel column main body
Butt welding, waits strong ties；The girder steel between second layer box steel column is reassembled, second layer framework is formed；
E, repetition D steps, until the framework of all floors is completed, form whole building frame system.
The side that the heavy wall insertion node square hollow section steel component framework system of the present invention is connected by heavy wall insertion box steel column node
Pipe box steel column and H-shaped girder steel assembly connection are formed.Not a node forced position is direct using thin-walled finished product square tube again for steel box column
By component length cutting stock；Joints position steel casing is using heavy wall finished steel square tube cutting stock or with hot rolled steel plate
Material is welded into casing；Insertion lining steel plate is welded in node location steel casing；By different wall steel square tube or welding steel casing
Butt welding, constitutes steel column；Surrounding welded steel beam connector or junction steel plate outside the casing of node location；At steel column bottom
Hold welded post bottom steel plate and post bottom stiffened steel plates.
The present invention has the advantages that：Steel box column stress node location is using heavy wall steel square tube or welding steel case
Body, while liner stiffened steel plates can be welded conveniently, sets liner stiffened steel plates corresponding with girder steel connector insertion in casing,
Improve between node and girder steel connector by force intensity, solve the problems, such as the stress of strong node.The non-main stress of steel box column
Position uses thin-walled finished steel square tube, not only reduces steel using amount, saves artificial, material resources and cost, again convenient processing,
Reduce process and process-cycle.The steel square tube of different wall or steel casing butt welding, can use automatic welding device or weldering
Welding robot is processed.Both welding quality is can guarantee that, labor strength can be reduced again.The construction method of the corresponding frame system
All components for constituting frame system can all be machined by prefabrication, assembled in situ only needs butt welding and bolt to connect
Connect.Installation period section, speed are fast, influence small to site environment, save artificial and cost.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Brief description of the drawings
Fig. 1 be embodiment in heavy wall insertion node square hollow section steel component framework system dimensional structure diagram.
Fig. 2 illustrates for the one of which box steel column of the heavy wall insertion node square hollow section steel component framework system in embodiment
Figure.
Fig. 3 be embodiment in heavy wall insertion node square hollow section steel component framework system another box steel column schematic diagram.
Fig. 4 is the girder steel schematic diagram in embodiment.
Label in figure：1- casings, 2- liner stiffened steel plates, 3- Steel Thin-Wall square tubes, 4- steel corbel wing plates, 5- steel corbel abdomens
Plate, 5 '-junction steel plate, 6- posts bottom steel plate, 7- posts bottom stiffened steel plates, 8- girder steels.
Embodiment
Embodiment
Referring to Fig. 1 and Fig. 2, it is illustrated that in heavy wall insertion node square hollow section steel component framework system for the present invention preferred side
Case, specifically includes some sections of Steel Thin-Wall square tubes 3, girder steel 8 and heavy wall insertion box steel column node and is spliced.
Specifically, heavy wall insertion box steel column node includes casing 1, liner stiffened steel plates 2, steel corbel wing plate 4 and steel ox
Leg web 5.
Casing 1 is the square pipe fitting of up/down perforation, i.e., be open setting in the top and bottom of casing 1, for
The Steel Thin-Wall square tube spliced up and down carries out butt welding.In practical application, it can be enclosed using finished product heavy wall steel square tube or steel plate welding
Into steel casing, the wall thickness of casing 1 is greater than the wall thickness of Steel Thin-Wall square tube, it is generally preferable to which the wall thickness of casing 1 is docking Steel Thin-Wall
1.1-2 times of square tube wall thickness, while should be guaranteed that the side outer wall of casing 1 is concordant with the outer wall of Steel Thin-Wall square tube, builds it
Steel structure surface it is smooth attractive in appearance.After some sections of Steel Thin-Wall square tubes are spliced with the casing 1 of heavy wall insertion box steel column node two-by-two
It may make up box steel column.
Liner stiffened steel plates 2 are provided with inside casing 1, liner stiffened steel plates 2 are used and the inner section identical shape of casing 1
Shape, liner stiffened steel plates 2 can be embedded into from the both-side opening of casing the inside of casing 1, and the casing 1 of the present embodiment uses two
The structure of end opening, its purpose one is in order to be put into liner stiffened steel plates 2, while can be by welding equipment effectively by liner
The side of stiffened steel plates 2 and the inwall of casing 1 are welded and fixed.
It is respectively welded in four side outer walls of casing 1 and is fixed with the girder steel that steel corbel wing plate 4 and steel corbel web 5 are constituted
Connector, wherein one end of steel corbel web 5 is weldingly fixed on the outer wall of casing 1 vertically, two pieces of levels along steel corbel wing plate 4
It is fixedly welded on the side up and down of steel corbel web 5, and the bolt connection of the reserved connection girder steel of the other end in steel corbel web 5
Hole position.Liner stiffened steel plates 2 are concordant with the steel corbel wing plate 4 of steel corbel web side about 5 in the horizontal level of box house,
Make steel corbel wing plate 4 and the formation continuous plane of constraint of insertion of liner stiffened steel plates 2, improve girder steel connector and node is direct
Horizontal torsion strength.The thickness of liner stiffened steel plates 2 can be identical with the thickness of steel corbel wing plate 4.
As shown in figure 3, in the lighter steel frame construction of load-bearing, the girder steel connector of node connection can be used directly vertically
On junction steel plate 5 ', the outer wall that the one end of junction steel plate 5 ' is weldingly fixed on to casing 1 vertically, connection girder steel is directly set thereon
Bolt connection hole position.
As shown in figure 4, the girder steel 8 of the present embodiment is H-shaped girder steel element, H-shaped structure can be manufactured using hot rolled steel plate
Part is directly cut using finished product H-shaped steel member by design size, and being provided with girder steel two ends is used to pass through spiral shell with steel corbel web
The bolt hole that bolt is fixedly connected, is fastenedly connected by bolt with steel corbel web 4, then by the upper and lower side of girder steel 6 and steel ox
Leg wing plate 3 is welded and fixed, and the rod structure and girder construction of steel construction are effectively reliably connected at node.
Box steel column main body in the present embodiment is thin with two sections respectively at the two ends of casing 1 of heavy wall insertion box steel column node
The butt welding of wall steel square tube 3, forms box steel column main body, and the girder steel connector in the outside of casing 1 is used to be connected with girder steel, passes through
Multigroup box steel column and some girder steels are built, and can build up steel structure frame system.
Every group of box steel column main body of the present embodiment is by two sections of Steel Thin-Wall square tubes 3 and two heavy wall insertion box steel column nodes
Splicing, nine groups of box steel column main bodys and girder steel are distributed according to field word to be connected, and forms two layers of building frame, every layer of building frame point
For four lattice.In practice of construction, the heavy wall insertion box steel column that a box steel column can be by N sections of Steel Thin-Wall square tubes 3 and no more than N
Node is spliced, and wherein N is at least 2, and framework is overall by least four groups box steel columns and steel beam splicing.In the thin-walled of the bottom
The welding of steel square tube bottom is provided with post bottom steel plate 6, and post bottom steel plate 6 is provided with the bolt hole for being used for anchoring with building foundation, post bottom steel
Welding is provided with post bottom stiffened steel plates 7 between plate 6 and Steel Thin-Wall square tube 3, improves the support strength of box steel column.
Construction this method of the heavy wall insertion node square hollow section steel component framework system of the present embodiment comprises the following steps：
A, elder generation process box steel column main body and girder steel in factory, are transported to erecting yard；Specifically, using finished steel square tube
Or casing is processed into hot rolled steel plate blanking；Liner stiffened steel plates are welded in casing；According to design size finished steel square tube
Cutting stock is into thin-walled finished steel square tube；To weld the casings of liner stiffened steel plates and thin-walled finished steel square tube butt welding into
One layer of box steel column main body；Steel corbel wing plate, steel corbel web are welded on casing exterior node size positions again；Finally by post bottom
Steel plate and post bottom stiffened steel plates are welded on the box steel column body bottom of bottom.Pass through above process, heavy wall insertion node square tube case
Shape steel column is machined.
When B, assembled in situ, first filling first layer has the box steel column main body of post bottom steel plate, by pre-buried earth anchor and nut with
Basis is fixedly connected；
C, girder steel between first layer box steel column is reassembled, girder steel is used with the girder steel connector on first layer box steel column
High-strength bolt is connected, and forms first layer framework；
D, by above and below the heavy wall insertion box steel column node of second layer box steel column main body and first layer box steel column main body
Butt welding, waits strong ties；The girder steel between second layer box steel column is reassembled, second layer framework is formed；
E, repetition D steps, until the framework of all floors is completed, form whole building frame system.
Embodiment above describes the general principle and principal character and advantages of the present invention of the present invention, the technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The concrete operating principle of invention, without departing from the spirit and scope of the present invention, the present invention also have various change and changed
Enter, these changes and improvements all fall within the protetion scope of the claimed invention, the claimed scope of the invention is by appended right
Claim and its equivalent thereof.
Claims (10)
1. heavy wall insertion node square hollow section steel component framework system, it is characterised in that：Including Steel Thin-Wall square tube, heavy wall insertion box-shaped steel
Column border node and girder steel；
Wherein, the heavy wall insertion box steel column node is included on casing, liner stiffened steel plates and girder steel connector, the casing
Lower insertion is set, the upper and lower ends of casing respectively with Steel Thin-Wall square tube butt welding, be spliced into box steel column main body, the casing
Wall thickness be 1.1-2 times of Steel Thin-Wall square tube；The liner stiffened steel plates are identical with box house section, and in embedded casing with
The inwall of casing is welded and fixed；
The side outer wall of the casing is welded with two, three or four steel according to correspondence box steel column main body position
Beam connection, the girder steel is fixedly connected with girder steel connector, and adjacent box steel column main body is linked to be into frame structure.
2. heavy wall insertion node square hollow section steel component framework system according to claim 1, the girder steel connector includes perpendicular
Straight junction steel plate.
3. heavy wall insertion node square hollow section steel component framework system according to claim 1, the girder steel connector includes perpendicular
The steel corbel wing plate that side is welded above and below straight steel corbel web and steel corbel web.
4. the heavy wall insertion node square hollow section steel component framework system according to Claims 2 or 3, institute's liner stiffened steel plates
At least two pieces, wherein two pieces of sides up and down respectively with junction steel plate or steel corbel web are alignd.
5. heavy wall insertion node square hollow section steel component framework system according to claim 1, the casing is finished product heavy wall steel
The steel casing that square tube or steel plate are welded into.
6. heavy wall insertion node square hollow section steel component framework system according to claim 5, the Steel Thin-Wall square tube is finished product
Steel square tube.
7. heavy wall insertion node square hollow section steel component framework system according to claim 6, the girder steel adds for hot rolled steel plate
Work into H-shaped steel member or finished product H-shaped steel member, the girder steel two ends and girder steel connector for bolt provided with being fixedly connected
Bolt hole.
8. heavy wall insertion node square hollow section steel component framework system according to claim 1, the box steel column main body includes
At least two sections Steel Thin-Wall square tubes and a heavy wall insertion box steel column node splicing, at least four box steel column main bodys pass through girder steel
It is linked to be frame structure.
9. heavy wall insertion node square hollow section steel component framework system according to claim 8, the box steel column main body most bottom
The Steel Thin-Wall square tube bottom welding of layer is provided with the post bottom steel plate that anchoring is fixed with foundation ground, post bottom steel plate and Steel Thin-Wall side
Welding is provided with post bottom stiffened steel plates between pipe.
10. a kind of construction this method of the heavy wall insertion node square hollow section steel component framework system in claim 1-9, its feature exists
In comprising the following steps：
A, elder generation process box steel column main body and girder steel in factory, are transported to erecting yard；
When B, assembled in situ, first filling first layer has the box steel column main body of post bottom steel plate, passes through pre-buried earth anchor and nut and basis
It is fixedly connected；
C, reassemble girder steel between first layer box steel column, girder steel and the girder steel connector on first layer box steel column are with high-strength
Bolt connection, forms first layer framework；
D, by second layer box steel column main body with being docked above and below the heavy wall insertion box steel column node of first layer box steel column main body
Welding, waits strong ties；The girder steel between second layer box steel column is reassembled, second layer framework is formed；
E, repetition D steps, until the framework of all floors is completed, form whole building frame system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710476538.3A CN107190853A (en) | 2017-06-21 | 2017-06-21 | Heavy wall insertion node square hollow section steel component framework system and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710476538.3A CN107190853A (en) | 2017-06-21 | 2017-06-21 | Heavy wall insertion node square hollow section steel component framework system and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107190853A true CN107190853A (en) | 2017-09-22 |
Family
ID=59878299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710476538.3A Pending CN107190853A (en) | 2017-06-21 | 2017-06-21 | Heavy wall insertion node square hollow section steel component framework system and its construction method |
Country Status (1)
| Country | Link |
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| CN (1) | CN107190853A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867864A (en) * | 2018-06-29 | 2018-11-23 | 中国二十冶集团有限公司 | A kind of box column node structure and its construction method |
| CN114856280A (en) * | 2022-04-28 | 2022-08-05 | 中交一公局集团有限公司 | Automatic welding assembly type steel structure with built-in pipeline |
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| US6219989B1 (en) * | 1997-09-29 | 2001-04-24 | Shinichi Tumura | Construction method of joining column and beam in building structure based on heavy-weight steel frame construction |
| CN101949173A (en) * | 2010-09-29 | 2011-01-19 | 中冶建筑研究总院有限公司 | Rectangular pipe column and H-shaped steel beam vertical externally-connected rigidly-connected joint |
| CN104088398A (en) * | 2014-07-21 | 2014-10-08 | 山东莱钢建设有限公司 | Rectangular steel pipe column |
| CN106121057A (en) * | 2016-08-25 | 2016-11-16 | 中冶建筑研究总院有限公司 | A kind of steel column web-type splicing node and installation method |
| CN206034642U (en) * | 2016-08-25 | 2017-03-22 | 中冶建筑研究总院有限公司 | Steel column flange formula splicing joint |
| CN206888188U (en) * | 2017-06-21 | 2018-01-16 | 长沙三远钢结构有限公司 | A kind of heavy wall penetrates node square hollow section steel component framework system |
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| US6219989B1 (en) * | 1997-09-29 | 2001-04-24 | Shinichi Tumura | Construction method of joining column and beam in building structure based on heavy-weight steel frame construction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867864A (en) * | 2018-06-29 | 2018-11-23 | 中国二十冶集团有限公司 | A kind of box column node structure and its construction method |
| CN114856280A (en) * | 2022-04-28 | 2022-08-05 | 中交一公局集团有限公司 | Automatic welding assembly type steel structure with built-in pipeline |
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Application publication date: 20170922 |
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