CN209083122U - A kind of assembly node that rubber support is connect with up-down structure - Google Patents
A kind of assembly node that rubber support is connect with up-down structure Download PDFInfo
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- CN209083122U CN209083122U CN201821593990.4U CN201821593990U CN209083122U CN 209083122 U CN209083122 U CN 209083122U CN 201821593990 U CN201821593990 U CN 201821593990U CN 209083122 U CN209083122 U CN 209083122U
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- prefabricated post
- rubber support
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Abstract
The utility model discloses the assembly nodes that a kind of rubber support is connect with up-down structure, including upper prefabricated post, rubber support and lower prefabricated post, rubber support is fixed between prefabricated post and lower prefabricated post, lower prefabricated post includes lower prefabricated post steel pipe, the inner upper of lower prefabricated post steel pipe is the reserved area Hou Jiao, concrete is cast in lower prefabricated post steel pipe below the area Hou Jiao, it is reserved with lower construction steel pipe connecting hole in concrete and lower prefabricated post wears muscle hole, upper prefabricated post includes upper prefabricated post steel pipe, the lower inside of upper prefabricated post steel pipe is the reserved area Hou Jiao, concrete is cast in upper prefabricated post steel pipe above the area Hou Jiao, it is reserved with construction steel pipe connecting hole in concrete and upper prefabricated post wears muscle hole.The assembly node of the utility model provides a kind of new path and measure for the trim designs and construction method of assembled isolation structure, provides an effective measures to solve mounting technique and the construction method of fabricated construction.
Description
Technical field
The utility model belongs to precast reinforced concrete structure mounting technology field, is related to a kind of rubber support and up and down
The assembly node of structure connection.
Background technique
As a kind of good structure type for resisting earthquake, the vast seismic region in China has obtained extensively isolation structure
General application.By the end of 2016, " 12th Five-Year Plan " period China, which has added up to build up, subtracted shock-insulation building more than 3400, subtracted shock insulation effect
Fruit is good." town and country construction Seismic Resistance And Disaster Reduction " 13 " planning " explicitly points out, and high-intensity earthquake fortification zone and post-disaster reconstruction area are newly-built
School, hospital architecture use subtract seismic isolation technology ratio and reach 20%.The synthesis energy that earthquake is resisted in China's building structure is improved comprehensively
Power, earthquake disaster mitigation loses to greatest extent, widelys popularize and subtracts application of the seismic isolation technology in building structure necessarily as one kind
Trend.
Seismic Isolation of Isolation Layer design is very important link in isolation structure design process, is always project planner and construction
The emphasis of personnel's concern, the construction that the design and selection of Seismic Isolation of Isolation Layer post and lintel system and Seismic Isolation of Isolation Layer support directly affect isolation structure are difficult
Degree and construction quality.
Currently, shock isolating pedestal installation and construction still have some problems in isolation structure.Problem is first is that built-in connection
Installation and difficulty of construction it is larger, preburied component position is difficult to determine, flatness is more difficult to control.Problem second is that shock isolating pedestal it is upper
The fixation of lower connecting plate and installation process are relative complex, and the installation of connector is more difficult in place.Problem is third is that generally existing and shock insulation
Support to be vertically connected with column (buttress) design and construction reinforcing bar more, seriously affect construction quality and efficiency.
Summary of the invention
In view of this, the purpose of this utility model is to provide the assembly sections that a kind of rubber support is connect with up-down structure
Point.
In order to achieve the above objectives, the utility model provides the following technical solutions:
A kind of assembly node that rubber support is connect with up-down structure, including upper prefabricated post, rubber support and lower prefabricated post,
Rubber support is fixed between prefabricated post and lower prefabricated post, and lower prefabricated post includes lower prefabricated post steel pipe, lower prefabricated post steel pipe
Inner upper is the reserved area Hou Jiao, is cast with concrete in the lower prefabricated post steel pipe below the area Hou Jiao, is reserved in concrete
Lower construction steel pipe connecting hole and lower prefabricated post wear muscle hole, and upper prefabricated post includes upper prefabricated post steel pipe, the inside of upper prefabricated post steel pipe
Lower section is the reserved area Hou Jiao, is cast with concrete in the upper prefabricated post steel pipe above the area Hou Jiao, is reserved with structure in concrete
It makes steel pipe connecting hole and upper prefabricated post wears muscle hole.
Further, substructure connection reinforcing bar passes through lower prefabricated post and wears muscle hole, and the upper end that substructure connects reinforcing bar is logical
Anchored end to be crossed to be anchored in the lower area prefabricated post steel pipe Nei Houjiao, superstructure connection reinforcing bar passes through upper prefabricated post and wears muscle hole, on
The lower end of portion's structure connection reinforcing bar is anchored in the upper area prefabricated post steel pipe Nei Houjiao by anchored end.
Further, anchored end connect reinforcing bar with substructure and uses threaded connection, screw thread built in anchored end band, lower junction
Structure connects the external screw thread of reinforcing bar.
Further, anchored end includes that the anchored end on end plate and end plate wears muscle hole, and setting is conducive to the 1/4 of grouting on end plate
Notch.
Further, the upper end of lower prefabricated post is fixed on lower embedded board, is connected in the middle part of the lower end surface of lower embedded board
The lower construction steel pipe for protruding from lower embedded board and matching with lower construction steel pipe connecting hole.
Further, lower construction steel pipe is bilateral construction steel pipe, and lower construction steel pipe includes lower steel pipe walls, is opened in lower steel pipe walls
Descended slurry hole.
Further, the lower end of upper prefabricated steel pipe is fixed on embedded board, and the middle part of the upper surface of upper embedded board is affixed
There is the upper construction steel pipe for protruding from embedded board and matching with upper construction steel pipe connecting hole.
Further, upper construction steel pipe is unilateral steel pipe, and upper construction steel pipe includes upper steel pipe walls, is provided in upper steel pipe walls
Cross slurry hole.
Further, upper prefabricated post is fixed on embedded board, and lower prefabricated post is fixed on lower embedded board, upper embedded board and
Lower embedded board is bolted with the upper junction plate of rubber support and lower connecting plate by connection respectively.
Further, several ribbed stiffeners are symmetrically arranged on the lateral wall of lower prefabricated post, on the lateral wall of upper prefabricated post
It is symmetrically arranged with several ribbed stiffeners.
The utility model has the beneficial effects that:
(1) the utility model reduces installation and in place interference of the reinforcing bar to embedded board using Prefabricated concrete-filled steel tube,
The flatness precision for ensuring rubber support, improves installation quality；
(2) the Prefabricated concrete-filled steel tube column of the utility model can realize that standardized production improves construction efficiency and construction matter
Amount；
(3) connecting plate of the rubber support of the utility model is connect with embedded board using outer bolt, easy for installation；
(4) embedded board of the utility model and Prefabricated concrete-filled steel tube column are using floor welded connecting of putting more energy into, inside setting
Construction steel pipe increases cohesive force using rigid connection is poured after Materials with High Strength；
(5) structure reinforcing bars of the utility model and Prefabricated concrete-filled steel tube column are handled using end anchorage, and grout hole can be set
It is set to variable cross-section, mechanical snap power and frictional force between section is increased, is conducive to the transmitting of the power between component；
(6) inside of the utility model uses grouting treatment, easy to connect, and securely and reliably, the entirety for improving node is anti-
Shock stability；
(7) node of the utility model is used as using upper and lower Prefabricated concrete-filled steel tube column connects excessive component, good using its
Good mechanical property, reduces the installation difficulty of rubber support；
(8) assembly node of the utility model provides one kind for the trim designs and construction method of assembled isolation structure
New path and measure has important engineering significance to the development of assembled arthitecutral structure, for the peace for solving fabricated construction
Dress technology and construction method provide an effective measures.
Detailed description of the invention
The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new
The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.?
In attached drawing:
Fig. 1 is the rubber support and Standard node side schematic view of the utility model embodiment；
Fig. 2 is the rubber support and Standard node schematic diagram of the utility model embodiment；
Fig. 3 is that the upper prefabricated post plane of the utility model embodiment is illustrated；
Fig. 4 is the diagrammatic cross-section at the 1-1 in Fig. 3；
Fig. 5 is the upper embedded board side schematic view of the utility model embodiment；
Fig. 6 is the upper embedded board floor map of the utility model embodiment；
Fig. 7 is the lower embedded board side schematic view of the utility model embodiment；
Fig. 8 is the lower embedded board floor map of the utility model embodiment；
Fig. 9 is the structural schematic diagram of the upper construction steel pipe of the utility model embodiment；
Figure 10 is the structural schematic diagram of the lower construction steel pipe of the utility model embodiment；
Figure 11 is the structural schematic diagram of the lower prefabricated post of the utility model embodiment；
Figure 12 is the diagrammatic cross-section at the 2-2 in Figure 11；
Figure 13 is the structural schematic diagram at the Bar Anchorage end of the utility model embodiment.
Description of symbols:
1, upper prefabricated post；11, upper construction steel pipe connecting hole；12, upper prefabricated post steel pipe；13, upper prefabricated post wears muscle hole；2, rubber
Glue support；21, upper embedded board；211, upper bolt hole；212, upper construction steel pipe；2121, upper steel pipe walls；2122, upper to cross slurry hole；
22, upper junction plate；23, lower connecting plate；24, lower embedded board；241, lower bolt hole；242, lower construction steel pipe；2421, lower steel pipe
Wall；2422, slurry hole was descended；25, bolt is connected；3, lower prefabricated post；31, lower construction steel pipe connecting hole；32, lower prefabricated post steel pipe；
33, lower prefabricated post wears muscle hole；4, ribbed stiffener；5, Hou Jiaoqu；6, superstructure connects reinforcing bar；7, substructure connects reinforcing bar；8,
Anchored end；81, anchored end wears muscle hole；82, end plate.
Specific embodiment
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more of the features.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Fig. 1 to 13, a kind of assembly node that rubber support is connect with up-down structure, including upper prefabricated post 1, rubber
Support 2 and lower prefabricated post 3, rubber support 2 are fixed between prefabricated post 1 and lower prefabricated post 3.
Lower prefabricated post 3 includes lower prefabricated post steel pipe 32, and the inner upper of lower prefabricated post steel pipe 32 is the reserved area Hou Jiao 5,
It is cast with concrete in the lower prefabricated post steel pipe 32 of 5 lower section of the area Hou Jiao, lower 31 He of construction steel pipe connecting hole is reserved in concrete
Lower prefabricated post wears muscle hole 33, and lower construction steel pipe connecting hole 31 is located at the center of lower prefabricated post steel pipe 32, and lower prefabricated post wears muscle
Side wall of the hole 33 inside lower prefabricated post steel pipe 32.
Substructure connection reinforcing bar 7 passes through lower prefabricated post and wears muscle hole 33, and the upper end of substructure connection reinforcing bar 7 passes through anchoring
End 8 is anchored in lower 32 area Nei Houjiao 5 of prefabricated post steel pipe, and anchored end 8 connect reinforcing bar 7 with substructure and uses threaded connection,
Anchored end 8 connects the external screw thread of reinforcing bar 7 with built-in screw thread, substructure.Anchored end 8 includes the anchoring on end plate 82 and end plate 82
Muscle hole 81 is worn at end, and 1/4 notch is arranged on end plate 82, is conducive to grouting in this way.If being symmetrically arranged on the lateral wall of lower prefabricated post 3
Dry ribbed stiffener 4.Ribbed stiffener 4 keeps flushing with the upper end of lower prefabricated post 3.Ribbed stiffener 4 can be welded in advance in lower prefabricated post 3,
It can also temporarily dispose.
The upper end of lower prefabricated post 3 is fixed on lower embedded board 24, is connected with protrusion in the middle part of the lower end surface of lower embedded board 24
In lower embedded board 24 and with the lower lower construction steel pipe 242 that matches of construction steel pipe connecting hole 31, lower construction steel pipe 242 is bilateral structure
Steel pipe is made, lower construction steel pipe 242 includes lower steel pipe walls 2421, is provided with slurry hole 2422 in lower steel pipe walls 2421, lower to cross slurry hole
2422 length direction is identical as the lower construction axis direction of steel pipe 242, and the both ends of the lower length direction for crossing slurry hole 2422 are not passed through
Wear steel pipe walls 2421.
Lower embedded board 24 is fixedly connected with the lower connecting plate 23 of rubber support 2 by connecting bolt 25, lower embedded board 24
Four angles are provided with the lower bolt hole 241 for installing connection bolt 25.
The upper junction plate 22 of rubber support 2 is fixedly connected by connecting bolt 25 with upper embedded board 21, upper embedded board 21
Four angles are provided with the upper bolt hole 211 for installing connection bolt 25.
The middle part of upper embedded board 21 is provided with the upper construction steel pipe 212 for protruding from embedded board 21, and upper construction steel pipe 212 is
Unilateral steel pipe, upper construction steel pipe 212 include upper steel pipe walls 2121, are provided with slurry hole 2122 in upper steel pipe walls 2121.It is upper prefabricated
Column 1 includes upper prefabricated post steel pipe 12, and the lower inside of upper prefabricated post steel pipe 12 is the reserved area Hou Jiao 5, upper above the area Hou Jiao 5
It is cast with concrete in prefabricated post steel pipe 12, construction steel pipe connecting hole 11 is reserved in concrete and upper prefabricated post wears muscle hole
13, upper construction steel pipe connecting hole 11 is located at the center of upper prefabricated post steel pipe 12, and upper prefabricated post wears muscle hole 13 close to upper prefabricated
Side wall inside column steel pipe 12.
Superstructure connection reinforcing bar 6 passes through upper prefabricated post and wears muscle hole 13, and the lower end of superstructure connection reinforcing bar 6 passes through anchoring
End 8 is anchored in 12 area Nei Houjiao 5 of prefabricated post steel pipe, and anchored end 8 connect reinforcing bar 6 with superstructure and uses threaded connection,
Anchored end 8 connects the external screw thread of reinforcing bar 6 with built-in screw thread, superstructure.Anchored end 8 includes the anchoring on end plate 82 and end plate 82
Muscle hole 81 is worn at end, and 1/4 notch is arranged on end plate 82, is conducive to grouting in this way.If being symmetrically arranged on the lateral wall of upper prefabricated post 1
Dry ribbed stiffener 4.Ribbed stiffener 4 keeps flushing with the lower end of upper prefabricated post 1.Ribbed stiffener 4 can be welded in advance in prefabricated post 1,
It can also temporarily dispose.
Steel pipe is used outside lower prefabricated post 3, internal casting concrete, there are one with 8 side upper surface of anchored end for concrete
Set a distance, convenient for the construction and installation of anchored end 8, internal settable distributing bar.Lower prefabricated post 3 has lower grout hole, lower filling
Slurry hole and lower prefabricated post wear muscle hole 33 and variable cross-section can be set into, increase mechanical snap power and frictional force between section, have
Conducive to the transmitting of the power between component.Lower embedded board 24 has grout hole.Upper embedded board 21 is sealed at corresponding position without grout hole
It closes.
The upper and lower connecting plate (22,23) and upper and lower embedded board (21,24) same size of rubber support 2, corresponding position has
Respective bolt holes.
Steel duct casting concrete is used outside upper prefabricated post 1, there are certain distances with steel pipe lower surface for concrete, just
In the construction and installation of anchored end 8, internal settable distributing bar.Upper prefabricated post 1 has upper grout hole, grout hole and upper prefabricated
Column, which wears muscle hole 13, can be set into variable cross-section.
The concrete that a high grade can be used in lower grout hole and upper grout hole, can also be used Materials with High Strength and first pours, under
Prefabricated post wears muscle hole 33 and upper prefabricated post is worn in muscle hole 13 and poured using high-strength grouting material.
The construction method of the utility model:
Lower prefabricated post 3 is connected by the first step with substructure, and substructure connection reinforcing bar 7 is worn by lower prefabricated post
Muscle hole 33 is reliably anchored in lower 3 area Nei Houjiao 5 of prefabricated post using anchored end 8；
Second step is worn in muscle hole 33 by the downward prefabricated post in gap between the end plate 82 of anchored end 8 and grouting material is perfused；
Third step installs lower embedded board 24, and the lower construction steel pipe that lower construction steel pipe 242 is placed in lower prefabricated post 3 is connected
In hole 31, vertical position and the horizontal position of lower embedded board 24 are adjusted, design requirement is met；
Lower embedded board 24 is welded and fixed by ribbed stiffener 4 with lower prefabricated post 3 4th step；
5th step pours grouting material in the area Hou Jiao 5 of downward prefabricated post 3, until space is completely filled with；
6th step installs rubber support 2, will be under the bolt hole of the lower connecting plate 23 of rubber support 2 and lower embedded board 24
Bolt hole 241 is corresponding, is then attached using connection bolt 25；
7th step, upper embedded board 21 is corresponding with the bolt hole of upper junction plate 22, then connected using connection bolt 25
It connects；
Superstructure connection reinforcing bar 6 is worn muscle hole 13 by upper prefabricated post, is carried out in end using anchored end 8 by the 8th step
Anchoring；
Upper prefabricated post 1 and upper embedded board 21 are attached by the 9th step, by the upper construction steel pipe 212 of upper embedded board 21 with
Upper construction steel pipe connecting hole 11 is corresponding, adjusts horizontal position and vertical position, meets design requirement；
Upper prefabricated post 1 is welded and fixed with upper embedded board 21 using ribbed stiffener 4 0th step；
11st step constructs steel pipe connecting hole 11 upwards and upper prefabricated post wears 1 area Nei Houjiao 5 of muscle hole 13 and upper prefabricated post
Interior perfusion grouting material, until material filling is full in space.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Claims (10)
1. the assembly node that a kind of rubber support is connect with up-down structure, it is characterised in that: including upper prefabricated post (1), rubber branch
Seat (2) and lower prefabricated post (3), rubber support (2) are fixed between prefabricated post (1) and lower prefabricated post (3), lower prefabricated post (3)
Including lower prefabricated post steel pipe (32), the inner upper of lower prefabricated post steel pipe (32) is the reserved area Hou Jiao (5), under the area Hou Jiao (5)
Side lower prefabricated post steel pipe (32) in is cast with concrete, be reserved in concrete lower construction steel pipe connecting hole (31) and under it is prefabricated
Column is worn muscle hole (33), and upper prefabricated post (1) includes upper prefabricated post steel pipe (12), and the lower inside of upper prefabricated post steel pipe (12) is reserved
The area Hou Jiao (5), be cast with concrete in upper prefabricated post steel pipe (12) above the area Hou Jiao (5), be reserved with structure in concrete
It makes steel pipe connecting hole (11) and upper prefabricated post wears muscle hole (13).
2. the assembly node that rubber support according to claim 1 is connect with up-down structure, it is characterised in that: substructure
Connection reinforcing bar (7) passes through lower prefabricated post and wears muscle hole (33), and the upper end that substructure connects reinforcing bar (7) is anchored by anchored end (8)
In lower prefabricated post steel pipe (32) area Nei Houjiao (5), superstructure connection reinforcing bar (6) passes through upper prefabricated post and wears muscle hole (13),
The lower end of superstructure connection reinforcing bar (6) is anchored in prefabricated post steel pipe (12) area Nei Houjiao (5) by anchored end (8).
3. the assembly node that rubber support according to claim 2 is connect with up-down structure, it is characterised in that: anchored end
(8) reinforcing bar (7) are connect with substructure using being threadedly coupled, anchored end (8) connects reinforcing bar (7) with built-in screw thread, substructure
External screw thread.
4. the assembly node that rubber support according to claim 2 is connect with up-down structure, it is characterised in that: anchored end
It (8) include that anchored end on end plate (82) and end plate (82) is worn muscle hole (81), setting is conducive to grouting on end plate (82) 1/4 lacks
Mouthful.
5. the assembly node that rubber support according to claim 1 is connect with up-down structure, it is characterised in that: lower prefabricated post
(3) upper end is fixed on lower embedded board (24), is connected in the middle part of the lower end surface of lower embedded board (24) and is protruded from lower embedded board
(24) and with lower construction steel pipe connecting hole (31) the lower construction steel pipe (242) to match.
6. the assembly node that rubber support according to claim 5 is connect with up-down structure, it is characterised in that: lower construction steel
Managing (242) is bilateral construction steel pipe, and lower construction steel pipe (242) includes lower steel pipe walls (2421), is provided on lower steel pipe walls (2421)
It is lower to cross slurry hole (2422).
7. the assembly node that rubber support according to claim 1 is connect with up-down structure, it is characterised in that: upper prefabricated post
(1) lower end is fixed on embedded board (21), is connected in the middle part of the upper surface of upper embedded board (21) and is protruded from embedded board
(21) and with upper construction steel pipe connecting hole (11) the upper construction steel pipe (212) to match.
8. the assembly node that rubber support according to claim 7 is connect with up-down structure, it is characterised in that: upper construction steel
Managing (212) is unilateral steel pipe, and upper construction steel pipe (212) includes upper steel pipe walls (2121), is provided on upper steel pipe walls (2121)
It starches hole (2122).
9. the assembly node that rubber support according to claim 1 is connect with up-down structure, it is characterised in that: upper prefabricated post
(1) be fixed on embedded board (21), lower prefabricated post (3) is fixed on lower embedded board (24), upper embedded board (21) and under it is pre-buried
Plate (24) passes through connection bolt (25) connection with the upper junction plate (22) of rubber support (2) and lower connecting plate (23) respectively.
10. the assembly node that rubber support according to claim 1 is connect with up-down structure, it is characterised in that: under it is prefabricated
Be symmetrically arranged on the lateral wall of column (3) several ribbed stiffeners (4), upper prefabricated post (1) if lateral wall on be symmetrically arranged with
Dry ribbed stiffener (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821593990.4U CN209083122U (en) | 2018-09-28 | 2018-09-28 | A kind of assembly node that rubber support is connect with up-down structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821593990.4U CN209083122U (en) | 2018-09-28 | 2018-09-28 | A kind of assembly node that rubber support is connect with up-down structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209083122U true CN209083122U (en) | 2019-07-09 |
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ID=67117908
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821593990.4U Active CN209083122U (en) | 2018-09-28 | 2018-09-28 | A kind of assembly node that rubber support is connect with up-down structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112695954A (en) * | 2020-12-21 | 2021-04-23 | 成都城投远大建筑科技有限公司 | Prefabricated column sectional prefabricating and mounting process |
-
2018
- 2018-09-28 CN CN201821593990.4U patent/CN209083122U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112695954A (en) * | 2020-12-21 | 2021-04-23 | 成都城投远大建筑科技有限公司 | Prefabricated column sectional prefabricating and mounting process |
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