CN116180897A - Prefabricated girder component with secondary girder connecting joints and manufacturing method thereof - Google Patents
Prefabricated girder component with secondary girder connecting joints and manufacturing method thereof Download PDFInfo
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- CN116180897A CN116180897A CN202310225322.5A CN202310225322A CN116180897A CN 116180897 A CN116180897 A CN 116180897A CN 202310225322 A CN202310225322 A CN 202310225322A CN 116180897 A CN116180897 A CN 116180897A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 61
- 239000010959 steel Substances 0.000 claims description 61
- 238000003466 welding Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 18
- 238000005034 decoration Methods 0.000 claims description 17
- 210000000988 bone and bone Anatomy 0.000 claims description 14
- 238000009415 formwork Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 22
- 238000009417 prefabrication Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002002 slurry Substances 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
- 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
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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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
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
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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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
- E04C3/294—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete of concrete combined with a girder-like structure extending laterally outside the element
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- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a prefabricated girder component with secondary girder connecting joints and a manufacturing method thereof, wherein the prefabricated girder component comprises a girder, secondary girder connecting sections and connecting pieces, the girder comprises a girder lattice type framework, the secondary girder connecting sections comprise secondary girder section lattice type frameworks, and the girder lattice type frameworks are connected with the secondary girder section lattice type frameworks through the connecting pieces; the beam lattice type framework and the secondary beam section lattice type framework are coated with concrete layers; a section of beam lattice type framework which is not covered by the concrete layer is reserved at the end part of the main beam as a main beam splicing end point; the end part of the secondary beam connecting section is reserved with a section of secondary beam section lattice framework which is not covered with a concrete layer as a secondary beam splicing end point. According to the invention, the whole framework formed by connecting the beam lattice framework and the secondary beam section lattice framework is arranged, concrete is poured outside the whole framework, so that prefabrication of the primary and secondary beam nodes is realized, and the construction quality can be well ensured; the on-site connection avoids the Liang Jiaodian part of the primary and secondary parts, the stress of the connection part is small, and the structure is easy to bear construction load.
Description
Technical Field
The invention belongs to the technical field of prefabricated building structures, and relates to a prefabricated main beam component with secondary beam connecting nodes and a manufacturing method thereof.
Background
The fabricated building refers to a building which is constructed by prefabricating and standardizing part or all of the building components in a factory and adopting a fabricated and installed mode on site. The method has the advantages of short construction period, high construction speed, less field wet operation, environmental protection and the like. The assembly type construction can better meet the requirements of energy conservation, environmental protection and the like of green construction, reduce the negative influence on the environment, reduce the field wet work load, reduce the labor cost and the risk in the aspect of safe production, and follow the principle of sustainable development.
The existing fabricated building structure system is generally used for casting members such as precast beams and columns in factories, and connecting nodes between the precast beams and precast columns and structures such as main beams and secondary beams in construction sites. The structure of the connecting node is complex, so that the site construction is inconvenient; the longitudinal stress steel bars of the beam and the column members are generally connected by adopting grouting sleeves, slurry anchor lap joints and the like, so that the construction precision requirement is high, the difficulty is high, and potential safety hazards are easily left; meanwhile, the connection joint of the beam and the column is generally a key part of structural stress and needs to bear larger force, so that the connection and stress of the joint part are required to be reliable, the construction quality is higher, and the connection quality of in-situ pouring is not easy to ensure. Therefore, it is necessary to design a prefabricated girder component with secondary girder connection joints and a manufacturing method thereof, so as to realize the prefabrication of the connection joints of the girder and the secondary girder and ensure the stress performance of the joint joints.
Disclosure of Invention
The invention aims to solve the technical problem of providing a prefabricated main beam component with secondary beam connecting joints and a manufacturing method thereof, wherein the connecting joints of the main beam component and the secondary beam component adopt a factory prefabrication mode, so that the construction quality is ensured, and the lattice type framework is adopted, so that the stress performance and the deformation resistance of the joints are improved; the convenient connection of the main beam component and the secondary beam component is realized.
The invention provides a prefabricated girder component with secondary girder connecting joints, which comprises a girder, secondary girder connecting sections and connecting pieces, wherein the girder comprises a girder lattice type framework, the secondary girder connecting sections comprise secondary girder section lattice type frameworks, and the girder lattice type frameworks are connected with the secondary girder section lattice type frameworks through the connecting pieces; the beam lattice frameworks and the secondary beam section lattice frameworks are coated with concrete layers; a section of beam lattice framework which is not covered by the concrete layer is reserved at the end part of the main beam as a main beam splicing end point; and a section of secondary beam section lattice framework which does not cover the concrete layer is reserved at the end part of the secondary beam connecting section to serve as a secondary beam splicing end point.
Further, the beam lattice framework and the secondary beam section lattice framework both comprise longitudinal steel bones and decoration materials connected with the longitudinal steel bones.
Further, the beam lattice framework and the secondary beam section lattice framework are rectangular, four longitudinal steel bones are arranged in parallel, and the four longitudinal steel bones are sequentially connected with each other to form a rectangular lattice framework.
Further, the longitudinal steel rib comprises but is not limited to angle steel or channel steel, and the decoration material comprises but is not limited to a lacing plate, a lacing bar or stirrup; the longitudinal steel bones and the decoration materials are connected in a bolt connection mode, a welding connection mode and a bolt welding mixed connection mode.
Further, the connecting piece comprises a connecting plate, wherein the connecting plate comprises, but is not limited to, a steel plate, T-shaped steel, C-shaped steel and square steel pipes; the connection mode of the connection plate and the secondary beam section lattice type framework and/or the beam lattice type framework is bolt connection, welding connection and bolt-welding mixed connection.
Further, the connecting piece further comprises a groove piece; the groove piece is connected with the secondary beam section lattice framework and the connecting plate, the connecting plate is welded with the groove piece, and the secondary beam section lattice framework is connected with the groove piece through bolts; the trough members include, but are not limited to, C-section steel and inverted T-section steel.
The invention provides a method for manufacturing a prefabricated main beam component with secondary beam connecting nodes, which aims to solve the technical problems and comprises the following steps: s1: manufacturing longitudinal steel bones and decoration materials, and connecting the longitudinal steel bones through the decoration materials to form a beam lattice framework and a secondary beam section lattice framework; s2: a connecting piece is arranged on the beam lattice type framework; the connection mode comprises but is not limited to welding connection, bolt connection and bolt-welding mixed connection; s3: connecting the secondary beam section lattice type framework with the connecting piece to enable the beam lattice type framework and the secondary beam section lattice type framework to be connected into a framework whole; the connection mode comprises but is not limited to welding connection, bolt connection and bolt-welding mixed connection; s4: and (3) reserving the thickness of a concrete layer on the whole outer surface of the framework, supporting a mould, pouring concrete, curing and forming to form the prefabricated main beam component with the secondary beam connecting joints.
Further, in the step S4, a section of the beam lattice framework, which does not need to be poured with concrete, is reserved at the end of the beam lattice framework as a main beam splicing end point during formwork supporting; and reserving a section which does not need to be poured with concrete at the end part of the secondary beam section lattice type framework as a secondary beam splicing end point.
Compared with the prior art, the invention has the following beneficial effects: according to the prefabricated main beam component with the secondary beam connecting nodes and the manufacturing method thereof, the whole framework formed by connecting the beam lattice type framework and the secondary beam section lattice type framework is arranged, concrete is poured outside the whole framework, so that the prefabrication of the primary and secondary beam connecting nodes is realized, the construction quality can be well ensured, and the stress performance and the deformability of the nodes are improved by adopting the lattice type framework; the on-site connection avoids the Liang Jiaodian part of the primary and secondary parts, the stress of the connection part is small, the structure is easy to bear construction load, and the use of a template is reduced; the splicing with other girders is realized through the reserved main girder splicing end points, the splicing with the secondary girders is realized through the reserved secondary girder splicing end points, and the on-site installation construction is convenient and efficient, and the connection is stable and reliable.
Drawings
FIG. 1 is a schematic view of a prefabricated main girder element having secondary girder connection nodes according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the overall structure of a framework using a T-section steel connection plate in embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of the overall structure of a framework using a C-shaped steel connecting plate in embodiment 2 of the present invention;
fig. 4 is a schematic diagram of the overall structure of a framework using square steel tube connection plates in embodiment 3 of the present invention;
FIG. 5 is a schematic diagram of the overall structure of a framework in embodiment 4 of the present invention using connection plates and C-shaped steel channel members;
fig. 6 is a schematic diagram of the overall structure of the framework of embodiment 5 of the present invention using the connection plates and the inverted T-shaped steel channel members.
In the figure: 1. a main beam; 2. a secondary beam connecting section; 3. a connecting plate; 4. a trough member; 5. a bolt; 6. longitudinal steel ribs; 7. attaching materials; 8. a beam lattice type framework; 9. a secondary beam section lattice type framework; 10. and (3) a concrete layer.
Detailed Description
The invention is further described below with reference to the drawings and examples.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", "top", "bottom", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in place when the inventive product is used, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "disposed," "configured," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
FIG. 1 is a schematic view of a prefabricated main girder element having secondary girder connection nodes according to an embodiment of the present invention; fig. 2 is a schematic diagram of the overall structure of a framework using a T-section steel connection plate in embodiment 1 of the present invention.
Example 1
Referring to fig. 1 and 2, the prefabricated girder member with secondary girder connection nodes of embodiment 1 of the present invention includes a girder 1, a secondary girder connection section 2 and a connection piece, wherein the girder 1 includes a girder lattice type framework 8, the secondary girder connection section 2 includes a secondary girder section lattice type framework 9, and the girder lattice type framework 8 is connected with the secondary girder section lattice type framework 9 through the connection piece; the beam lattice type framework 8 and the secondary beam section lattice type framework 9 are coated with concrete layers 10; a section of beam lattice type framework 8 without covering a concrete layer 10 is reserved at the end part of the main beam 1 as a main beam splicing end point; the end part of the secondary beam connecting section 2 is reserved with a section of secondary beam section lattice framework 9 without a concrete layer 10 coated as a secondary beam splicing end point. The length of the secondary beam connecting section 2 is selected according to the principle of small stress and convenient construction so that the framework bears construction load.
Specifically, the beam lattice framework 8 and the secondary beam section lattice framework 9 both comprise longitudinal steel bones 6 and a decoration material 7 connected with the longitudinal steel bones 6. The beam lattice type framework 8 and the secondary beam section lattice type framework 9 are rectangular, the number of the longitudinal steel ribs 6 is four, the four longitudinal steel ribs 6 are arranged in parallel, and the four longitudinal steel ribs 6 are sequentially connected by the decoration material 7 to form a rectangular lattice type framework.
Preferably, the longitudinal steel ribs 6 comprise but are not limited to angle steel or channel steel, and the decoration materials 7 comprise but are not limited to lacing plates, lacing bars or stirrups; the longitudinal steel rib 6 and the decoration material 7 are connected in a bolt connection, a welding connection and a bolt welding mixed connection mode.
Specifically, the connecting piece comprises a connecting plate 3, and the connecting plate 3 can take different forms, including but not limited to steel plates, T-shaped steel (shown in fig. 2), C-shaped steel (shown in fig. 3) and square steel pipes (shown in fig. 4); the connection mode of the connection plate 3 and the secondary beam section lattice type framework 9 and/or the beam lattice type framework 8 is bolt connection, welding connection and bolt welding mixed connection.
Preferably, the connection piece further comprises a slot 4; the groove piece 4 is connected with the secondary beam section lattice framework 9 and the connecting plate 3, the connecting plate 3 is welded with the groove piece 4, and the secondary beam section lattice framework 9 is connected with the groove piece 4 through bolts; the channel member 4 includes, but is not limited to, a C-section steel (as shown in fig. 5), an inverted T-section steel (as shown in fig. 6). When the welding conditions are difficult to meet or the welding connection cannot meet the stress requirements, the connecting plate 3 and the groove piece 4 can be used for welding, and the secondary beam section lattice type framework 9 and the groove piece 4 are connected through bolts, as shown in fig. 6.
Example 2
Referring to fig. 3, the prefabricated main girder component having the secondary girder connection node according to embodiment 2 of the present invention is different from embodiment 1 in that: the connecting piece adopts connecting plate 3, and connecting plate 3 adopts C shaped steel.
Example 3
Referring to fig. 4, the prefabricated main girder component having the secondary girder connection node according to embodiment 3 of the present invention is different from embodiment 1 in that: the connecting piece adopts a connecting plate 3, and the connecting plate 3 adopts square steel pipes.
Example 4
Referring to fig. 5, the prefabricated main girder component having the secondary girder connection node according to embodiment 4 of the present invention is different from embodiment 1 in that: the connecting piece adopts connecting plate 3 and trough member 4, and trough member 4 adopts C shaped steel. The connecting plate 3 is welded with the groove piece 4, and the secondary beam section lattice framework 9 is connected with the groove piece 4 through bolts 5.
Example 5
Referring to fig. 6, the prefabricated main girder component having the secondary girder connection node according to embodiment 5 of the present invention is different from embodiment 1 in that: the connecting piece adopts connecting plate 3 and cell piece 4, and cell piece 4 adopts the back T shaped steel. The connecting plate 3 is welded with the groove piece 4, and the secondary beam section lattice framework 9 is connected with the groove piece 4 through bolts 5.
The manufacturing method of the prefabricated main beam component with the secondary beam connecting node comprises the following steps:
s1: manufacturing a longitudinal steel rib 6 and a decoration material 7, and connecting the longitudinal steel rib 6 through the decoration material 7 to form a beam lattice framework 8 and a secondary beam section lattice framework 9;
s2: a connecting piece is arranged on the beam lattice framework 8; the connection mode comprises but is not limited to welding connection, bolt connection and bolt-welding mixed connection;
s3: connecting the secondary beam section lattice type framework 9 with a connecting piece to enable the beam lattice type framework 8 and the secondary beam section lattice type framework 9 to be connected into a framework whole; the connection mode comprises but is not limited to welding connection, bolt connection and bolt-welding mixed connection;
s4: and (3) reserving the thickness of the concrete layer 10 on the whole outer surface of the framework, supporting the mould, pouring concrete, curing and forming to form the prefabricated main beam component with the secondary beam connecting joints.
When the formwork is supported, a section without pouring concrete is reserved at the end part of the beam lattice framework 8 to serve as a main beam splicing end point; and reserving a section without pouring concrete at the end part of the secondary beam section lattice type framework 9 as a secondary beam splicing end point.
The prefabricated girder component with the secondary girder connecting joints is prefabricated in a factory, is spliced with other girders through the reserved girder splicing end points in site construction, is spliced with the secondary girders through the reserved secondary girder splicing end points, and can be finished by only carrying out bolt connection installation or welding and pouring a small amount of concrete at the splicing position, so that the construction difficulty is low, the working efficiency is high, and a large amount of labor cost is saved.
In summary, the prefabricated main beam component with the secondary beam connection node and the manufacturing method thereof in the embodiment of the invention are provided with the integral framework formed by connecting the beam lattice framework 8 and the secondary beam section lattice framework 9, concrete is poured outside the integral framework, the prefabrication of the primary and secondary beam nodes is realized, the construction quality can be well ensured, and the stress performance and the deformability of the nodes are improved by adopting the lattice framework; the on-site connection avoids the Liang Jiaodian part of the primary and secondary parts, the stress of the connection part is small, the structure is easy to bear construction load, and the use of a template is reduced; the splicing with other girders is realized through the reserved main girder splicing end points, the splicing with the secondary girders is realized through the reserved secondary girder splicing end points, and the on-site installation construction is convenient and efficient, and the connection is stable and reliable.
While the invention has been described with reference to the preferred embodiments, it is not intended to limit the invention thereto, and it is to be understood that other modifications and improvements may be made by those skilled in the art without departing from the spirit and scope of the invention, which is therefore defined by the appended claims.
Claims (8)
1. The prefabricated girder component is characterized by comprising a girder, a secondary girder connecting section and a connecting piece, wherein the girder comprises a girder lattice framework, the secondary girder connecting section comprises a secondary girder section lattice framework, and the girder lattice framework is connected with the secondary girder section lattice framework through the connecting piece;
the beam lattice frameworks and the secondary beam section lattice frameworks are coated with concrete layers; a section of beam lattice framework which is not covered by the concrete layer is reserved at the end part of the main beam as a main beam splicing end point; and a section of secondary beam section lattice framework which does not cover the concrete layer is reserved at the end part of the secondary beam connecting section to serve as a secondary beam splicing end point.
2. The prefabricated main girder component with secondary girder connection joints according to claim 1, wherein the girder lattice skeleton and the secondary girder segment lattice skeleton each comprise a longitudinal steel rib and a decoration material connecting the longitudinal steel ribs.
3. The prefabricated main girder component with secondary girder connection nodes according to claim 2, wherein the girder lattice frameworks and the secondary girder segment lattice frameworks are rectangular, four longitudinal steel bones are arranged in parallel, and the decoration material is sequentially connected with the four longitudinal steel bones to form a rectangular lattice framework.
4. The prefabricated main girder component with secondary girder connection nodes according to claim 2, wherein the longitudinal steel ribs include but are not limited to angle steel or channel steel, and the decoration materials include but are not limited to lacing plates, lacing bars or stirrups; the longitudinal steel bones and the decoration materials are connected in a bolt connection mode, a welding connection mode and a bolt welding mixed connection mode.
5. The prefabricated main girder component having secondary girder connection nodes according to claim 1, wherein the connection members include connection plates including, but not limited to, steel plates, T-section steel, C-section steel, square steel pipes; the connection mode of the connection plate and the secondary beam section lattice type framework and/or the beam lattice type framework is bolt connection, welding connection and bolt-welding mixed connection.
6. The prefabricated main girder component having secondary girder connection nodes according to claim 5, wherein the connection member further comprises a groove member; the groove piece is connected with the secondary beam section lattice framework and the connecting plate, the connecting plate is welded with the groove piece, and the secondary beam section lattice framework is connected with the groove piece through bolts; the trough members include, but are not limited to, C-section steel and inverted T-section steel.
7. A method of making a prefabricated main girder element having secondary girder connection nodes according to any one of claims 1 to 6, comprising the steps of:
s1: manufacturing longitudinal steel bones and decoration materials, and connecting the longitudinal steel bones through the decoration materials to form a beam lattice framework and a secondary beam section lattice framework;
s2: a connecting piece is arranged on the beam lattice type framework; the connection mode comprises but is not limited to welding connection, bolt connection and bolt-welding mixed connection;
s3: connecting the secondary beam section lattice type framework with the connecting piece to enable the beam lattice type framework and the secondary beam section lattice type framework to be connected into a framework whole; the connection mode comprises but is not limited to welding connection, bolt connection and bolt-welding mixed connection;
s4: and (3) reserving the thickness of a concrete layer on the whole outer surface of the framework, supporting a mould, pouring concrete, curing and forming to form the prefabricated main beam component with the secondary beam connecting joints.
8. The method for manufacturing a prefabricated main beam member with secondary beam connecting nodes according to claim 7, wherein in the step S4, a section of the end of the beam lattice skeleton, which is not required to be poured with concrete, is reserved as a main beam splicing end point during formwork erection; and reserving a section which does not need to be poured with concrete at the end part of the secondary beam section lattice type framework as a secondary beam splicing end point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310225322.5A CN116180897A (en) | 2023-03-10 | 2023-03-10 | Prefabricated girder component with secondary girder connecting joints and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310225322.5A CN116180897A (en) | 2023-03-10 | 2023-03-10 | Prefabricated girder component with secondary girder connecting joints and manufacturing method thereof |
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| CN116180897A true CN116180897A (en) | 2023-05-30 |
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| CN202310225322.5A Pending CN116180897A (en) | 2023-03-10 | 2023-03-10 | Prefabricated girder component with secondary girder connecting joints and manufacturing method thereof |
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| Country | Link |
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| CN (1) | CN116180897A (en) |
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- 2023-03-10 CN CN202310225322.5A patent/CN116180897A/en active Pending
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