CN108952018B - Reinforcing structure with disconnected sleeve grouting connecting steel bars inside prefabricated shear wall component and construction method thereof - Google Patents
Reinforcing structure with disconnected sleeve grouting connecting steel bars inside prefabricated shear wall component and construction method thereof Download PDFInfo
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- CN108952018B CN108952018B CN201810915050.0A CN201810915050A CN108952018B CN 108952018 B CN108952018 B CN 108952018B CN 201810915050 A CN201810915050 A CN 201810915050A CN 108952018 B CN108952018 B CN 108952018B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 96
- 239000010959 steel Substances 0.000 title claims abstract description 96
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 50
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims description 26
- 239000000853 adhesive Substances 0.000 claims description 25
- 230000001070 adhesive effect Effects 0.000 claims description 25
- 238000004873 anchoring Methods 0.000 claims description 11
- 238000009415 formwork Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000011376 self-consolidating concrete Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- 239000003292 glue Substances 0.000 abstract 2
- 230000003313 weakening effect Effects 0.000 abstract 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 239000004567 concrete Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
-
- 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
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention provides a reinforcing structure with cut-off sleeve connecting steel bars inside a prefabricated shear wall component and a construction method thereof, wherein the reinforcing structure comprises a prefabricated shear wall component double-side externally-adhered steel plate reinforcing structure and a prefabricated shear wall component single-side externally-adhered steel plate reinforcing structure; the bar planting screw rods are planted with bar planting glue through the holes of the prefabricated shear wall, the through screw rods are arranged in the holes of the prefabricated shear wall, the externally-attached steel plates penetrate through the floor slab through the slotted holes of the floor slab, are bonded with the reinforcing wall body through structural glue, and are anchored through the screw rods and the nuts, so that the upper-layer prefabricated shear wall component and the lower-layer prefabricated shear wall component form a whole. The reinforcing method can effectively solve the problem of connection weakening caused by the fact that the sleeve connecting steel bars are cut off between the upper layer of prefabricated shear wall component and the lower layer of prefabricated shear wall component, and further improves the integrity, the bearing capacity and the anti-seismic performance of the prefabricated shear wall connecting node.
Description
Technical Field
The invention belongs to the field of building structures, and particularly relates to a reinforced structure with a cut-off sleeve connecting steel bar inside a prefabricated shear wall component and a construction method.
Background
In the research of the prefabricated concrete structure, the connection node of the prefabricated part is a theoretical weak link of the prefabricated concrete structure. The sleeve grouting connection is one of the most common connection forms of the vertical connection of the fabricated shear wall structure, so that the effective anchoring length of the grouting material in the sleeve and the extending reinforcing steel bars has an important influence on the stress of the vertical reinforcing steel bars and the engineering quality of the fabricated shear wall. At present, due to the fact that production precision of domestic prefabricated part factories is insufficient, installation level of field construction workers is low and the like, installation is difficult, some installation workers are prompted to adopt the situation that lower extending reinforcing steel bars are cut off to smoothly assemble prefabricated shear wall parts, and due to the fact that anchoring length of the reinforcing steel bars in the sleeves is insufficient, stressed reinforcing steel bars in the prefabricated wall boards cannot be effectively connected, and therefore the whole structure cannot achieve the same cast-in-place structural performance. It is necessary to reinforce the condition that the connecting steel bars in the sleeves are cut off in the assembled shear wall structure.
At the present stage, the research on a reinforcing method applied to the assembly type shear wall engineering in China is in a starting stage, a specific method for reinforcing the condition that the reinforcing steel bars inside the sleeve of the prefabricated shear wall member are cut off does not exist, and the condition that the reinforcing steel bars inside the sleeve are cut off by construction installers is very easy to occur in the field assembly process of the prefabricated shear wall member, so that a method capable of reinforcing the assembly type shear wall structure after the reinforcing steel bars inside the sleeve of the prefabricated shear wall member are cut off is urgently needed.
Disclosure of Invention
The invention aims to make up the defects of the existing prefabricated shear wall member reinforcing technology, and provides a reinforcing structure with a cut-off sleeve connecting steel bar inside a prefabricated shear wall member and a construction method thereof. Meanwhile, the reinforcing method has the characteristics of simplicity in manufacturing, convenience in construction and installation and the like, and has small influence on the original structure.
The technical scheme adopted by the invention is as follows: a reinforcing structure with cut-off sleeve connecting steel bars inside a prefabricated shear wall component comprises a prefabricated shear wall component double-side externally-adhered steel plate reinforcing structure and a prefabricated shear wall component single-side externally-adhered steel plate reinforcing structure;
the prefabricated shear wall component double-side externally-pasted steel plate reinforcing structure is adopted as a prefabricated shear wall I, and the prefabricated shear wall component single-side externally-pasted steel plate reinforcing structure is adopted as a prefabricated shear wall II.
The reinforcing structure of the prefabricated shear wall component with the externally-adhered steel plates on the two sides comprises an externally-adhered steel plate, structural adhesive, prefabricated shear wall holes, floor slab slotted holes, through screws, nuts and grouting material, the reinforcing structure is formed by oppositely pulling and anchoring two sides of a prefabricated shear wall component through externally-attached steel plates, the externally-attached steel plates penetrate through a floor slab through floor slab slotted holes and are bonded with a first prefabricated shear wall component through structural adhesive, a through screw is connected with the externally-attached steel plates through prefabricated shear wall holes of the first prefabricated shear wall component through nuts, grouting materials are filled in the prefabricated shear wall holes and the floor slab slotted holes of the first prefabricated shear wall component, the upper-layer prefabricated shear wall component and the lower-layer shear wall component form a whole through the externally-attached steel plates, the structural adhesive, the through screw, the nuts and the grouting materials, therefore, the anti-seismic performance of the prefabricated shear wall component cut off by the connecting steel bars in the sleeve is improved;
the reinforcing structure of the single-side externally-adhered steel plate of the prefabricated shear wall component comprises an externally-adhered steel plate, structural adhesive, prefabricated shear wall holes, floor slab slotted holes, bar-planting screws, nuts and grouting material, the reinforcing structure is characterized in that the reinforcing structure of the external steel plate at one side of the prefabricated shear wall component is formed by anchoring two prefabricated shear wall components at one side through the external steel plate and a bar-planting screw rod, the external steel plate penetrates through a floor slab slotted hole and is bonded with the two prefabricated shear walls through structural adhesive, one end of the bar-planting screw rod is embedded into the prefabricated shear wall hole, the other end of the bar-planting screw rod is connected with the external steel plate through a nut, the prefabricated shear wall hole and the floor slab slotted hole are filled with grouting material, the upper-layer prefabricated shear wall component and the lower-layer shear wall component form a whole through the external steel plate, the structural adhesive, the bar-planting screw rod, therefore, the anti-seismic performance of the prefabricated shear wall component cut off by the connecting steel bars in the sleeve is improved;
preferably, the grouting material is high-strength self-compacting concrete.
The construction method of the reinforced concrete superposed wall joint connecting structure comprises the following steps:
the first step is as follows: determining the width and thickness of an externally-attached steel plate and the number and position of the externally-attached steel plates according to the size of a connecting steel bar cut off from a sleeve inside a prefabricated shear wall component, forming prefabricated shear wall holes on the surface of a prefabricated shear wall I or a prefabricated shear wall II to be reinforced, and forming floor slab slotted holes on one side of the prefabricated shear wall and floor slab slotted holes on one side of the prefabricated shear wall II according to the width of the steel plates;
the second step is that: through screws are arranged through holes in the surface of the prefabricated shear wall I, or bar planting screws are arranged through holes in the surface of the prefabricated shear wall II;
the third step: penetrating an externally-attached steel plate through a slotted hole of a floor slab, and bonding the two sides of the first prefabricated shear wall with the wall body by using structural adhesive, or bonding the single side of the second prefabricated shear wall with the wall body by using structural adhesive;
the fourth step: the through screw and the external steel plate are respectively anchored by nuts at two sides, or the bar-planting screw and the external steel plate are anchored by nuts at one side;
the fifth step: and (3) erecting a formwork at the prefabricated shear wall I or the prefabricated shear wall II and the floor slab hole, then pouring grouting materials at the prefabricated shear wall hole and the floor slab grooving hole, and finishing the final reinforcing structure after the grouting materials are cured. Therefore, the upper and lower layers of prefabricated shear wall components are tightly combined together, and the seismic performance of the prefabricated shear wall is enhanced.
Has the advantages that: the reinforcing method solves the safety problem that the sleeve connecting steel bar is cut off in the installation and construction process of the prefabricated shear wall component within a reasonable and controllable economic range. The reasonable design that the steel bars in the prefabricated shear wall component sleeve are cut off and the steel plates are attached to the outside for through anchoring is adopted, so that the problem that the steel bars in the prefabricated shear wall component sleeve are cut off in the assembling process due to the fact that construction is not standardized can be solved, the bearing capacity and the anti-seismic performance of the prefabricated shear wall are improved, and the defect that the existing assembly type shear wall cannot be reinforced due to the installation quality problem is overcome. Meanwhile, the method has the advantages of small damage to the original structure, simple reinforcing connection mode, low reinforcing cost, convenience for practical engineering application and remarkable economic and social benefits.
Drawings
FIG. 1 is a schematic structural view of an externally attached steel plate of a prefabricated shear wall component according to the present invention;
FIG. 2 is a cross-sectional view of a two-sided externally attached steel plate;
fig. 3 is a cross-sectional view of a single-sided externally-attached steel plate.
Detailed Description
The invention will be further described with reference to the following drawings and detailed description:
as shown in fig. 1, 2 and 3: a reinforcing structure with cut-off sleeve connecting steel bars inside a prefabricated shear wall component comprises a prefabricated shear wall component double-side externally-adhered steel plate reinforcing structure and a prefabricated shear wall component single-side externally-adhered steel plate reinforcing structure;
the reinforcing structure is characterized in that the reinforcing structure is a first prefabricated shear wall 9 and the reinforcing structure is a second prefabricated shear wall 10.
The reinforcing structure of the external steel plates attached to the two sides of the prefabricated shear wall component comprises an external steel plate 1, structural adhesive 2, prefabricated shear wall holes 3, floor slab slotted holes 4, through screws 5, nuts 6 and grouting materials 7, the reinforcing of the externally-adhered steel plates at the two sides of the prefabricated shear wall component is formed by oppositely pulling and anchoring two sides of a prefabricated shear wall I9 through externally-adhered steel plates 1, the externally-adhered steel plates 1 penetrate through a floor slab through floor slab slotted holes 4 and are bonded with the prefabricated shear wall I9 through structural adhesive 2, the through screw rods 5 are connected with the externally-adhered steel plates 1 through prefabricated shear wall holes 3 by nuts, grouting materials 7 are filled in the prefabricated shear wall holes 3 and the floor slab slotted holes 4, the upper-layer prefabricated shear wall component and the lower-layer shear wall component form a whole through the externally-adhered steel plates 1, the structural adhesive 2, the through screw rods 5, the nuts 6 and the grouting materials 7, therefore, the anti-seismic performance of the prefabricated shear wall component cut off by the connecting steel bars in the sleeve is improved;
the reinforcing structure of the single-side externally-bonded steel plate of the prefabricated shear wall component comprises an externally-bonded steel plate 1, structural adhesive 2, prefabricated shear wall holes 3, floor slab slotted holes 4, bar-planting screws 8, nuts 6 and grouting materials 7, the reinforcing structure is characterized in that the reinforcing structure of the one-side externally-attached steel plate of the prefabricated shear wall component is formed by anchoring one side of a prefabricated shear wall II 10 through an externally-attached steel plate 1 and a bar-embedded screw 8, the externally-attached steel plate 1 penetrates through a floor slab slotted hole 4 and is bonded with the prefabricated shear wall II 10 through structural adhesive 2, one end of the bar-embedded screw 8 is embedded into a prefabricated shear wall hole 3, the other end of the bar-embedded screw is connected with the externally-attached steel plate 1 through a nut 6, the prefabricated shear wall hole 3 and the floor slab slotted hole 4 are filled with grouting material, the upper-layer prefabricated shear wall component and the lower-layer shear wall component form a whole through the externally-attached steel plate 1, the structural adhesive 2, therefore, the anti-seismic performance of the prefabricated shear wall component cut off by the connecting steel bars in the sleeve is improved;
the outer steel plate 1 can cut off the diameter of the steel bar and set the width and the thickness according to the sleeve, and penetrate through the floor slab.
The grouting material 7 is high-strength self-compacting concrete.
A construction method of a reinforced structure with a cut-off sleeve connecting steel bar inside a prefabricated shear wall component comprises the following steps:
the first step is as follows: determining the width and thickness of an externally-attached steel plate 1 and the number and position of the externally-attached steel plates 1 according to the size of a connecting steel bar of a sleeve in a prefabricated shear wall component, forming prefabricated shear wall holes 3 on the surfaces of a first prefabricated shear wall 9 or a second prefabricated shear wall 10 to be reinforced, forming floor slab slotted holes 4 on one side of the prefabricated shear wall and forming floor slab slotted holes 4 on one side of the second prefabricated shear wall according to the width of the steel plates;
the second step is that: through screw rods 5 are arranged in the prefabricated shear wall holes 3 on the surface of the prefabricated shear wall I9, or bar planting screw rods 8 are arranged in the prefabricated shear wall holes 3 on the surface of the prefabricated shear wall II 10;
the third step: penetrating an external steel plate 1 through a floor slab slotted hole 4, and bonding the two sides of a first prefabricated shear wall 9 with a wall body by using structural adhesive, or bonding the single side of a second prefabricated shear wall 10 with the wall body by using structural adhesive 2;
the fourth step: anchoring the through screw rod 5 and the outer steel plate 1 at two sides by nuts 6 respectively, or anchoring the bar-planting screw rod 8 and the outer steel plate 1 at one side by nuts;
the fifth step: and (3) formwork supporting is carried out at the prefabricated shear wall hole 3 and the floor slab slotted hole 4, then grouting material 7 is poured at the prefabricated shear wall hole 3 and the floor slab slotted hole 4, and the final reinforcing structure is completed after the grouting material 7 is cured. Therefore, the upper and lower layers of prefabricated shear wall components are tightly combined together, and the seismic performance of the prefabricated shear wall is enhanced.
The embodiments of the present invention are described in detail with reference to the drawings, but the present invention is not limited to the described embodiments, and it will be apparent to those skilled in the art that several modifications and variations can be made within the principle and technical spirit of the present invention, and these modifications and variations should be regarded as the protection scope of the present invention.
Claims (1)
1. The utility model provides a construction method of reinforced structure that prefabricated shear wall component internal sleeve joint reinforcing bar is cut off which characterized in that:
the reinforcing structure with the cut-off sleeve connecting steel bars inside the prefabricated shear wall component comprises a prefabricated shear wall component double-side externally-adhered steel plate reinforcing structure and a prefabricated shear wall component single-side externally-adhered steel plate reinforcing structure;
adopting the prefabricated shear wall component double-side externally-adhered steel plate reinforcing structure as a prefabricated shear wall I, and adopting the prefabricated shear wall component single-side externally-adhered steel plate reinforcing structure as a prefabricated shear wall II;
the reinforcing structure comprises an externally-attached steel plate, structural adhesive, prefabricated shear wall holes, floor slab slotted holes, a through screw, nuts and grouting materials, the reinforcing structure is formed by oppositely pulling and anchoring two sides of a prefabricated shear wall through the externally-attached steel plate, the externally-attached steel plate penetrates through the floor slab slotted holes and is bonded with the prefabricated shear wall I through the structural adhesive, and the through screw is connected with the externally-attached steel plate through the hole of the prefabricated shear wall through the nuts;
the reinforcing structure comprises an externally-attached steel plate, structural adhesive, prefabricated shear wall holes, floor slab slotted holes, bar-embedded screws, nuts and grouting materials, the reinforcing structure is formed by anchoring two prefabricated shear walls on one side through the externally-attached steel plate and the bar-embedded screws, the externally-attached steel plate penetrates through the floor slab slotted holes and is bonded with the two prefabricated shear walls through the structural adhesive, one ends of the bar-embedded screws are implanted into the prefabricated shear wall holes, and the other ends of the bar-embedded screws are connected with the externally-attached steel plate through the nuts;
the prefabricated shear wall holes and floor slab slotted holes of the prefabricated shear wall I are filled with grouting materials, and the upper-layer prefabricated shear wall component and the lower-layer shear wall component form a whole through externally-attached steel plates, structural adhesives, through screws, nuts and the grouting materials;
the prefabricated shear wall holes and the floor slab slotted holes of the prefabricated shear wall II are filled with grouting materials, and the upper-layer prefabricated shear wall component and the lower-layer shear wall component form a whole through externally-attached steel plates, structural adhesives, bar-planting screws, nuts, bar-planting adhesives and grouting materials;
the grouting material is high-strength self-compacting concrete;
the construction method of the reinforced structure with the cut-off sleeve connecting steel bars in the prefabricated shear wall component comprises the following steps:
the first step is as follows: determining the width and thickness of the externally-attached steel plates and the number and positions of the externally-attached steel plates according to the size of the connecting steel bars of the sleeve in the prefabricated shear wall component, so as to determine that the type of the reinforced prefabricated shear wall is a prefabricated shear wall I or a prefabricated shear wall II; arranging prefabricated shear wall holes on the surfaces of the prefabricated shear wall I or the prefabricated shear wall II to be reinforced, and arranging floor slab slotted holes on the two sides of the prefabricated shear wall or arranging floor slab slotted holes on the single side of the prefabricated shear wall according to the width of the externally attached steel plate;
the second step is that: through screws are arranged through holes in the surface of the prefabricated shear wall I, or bar planting screws are arranged through holes in the surface of the prefabricated shear wall II;
the third step: penetrating an externally-attached steel plate through a slotted hole of a floor slab, and bonding the two sides of the first prefabricated shear wall with the wall body by using structural adhesive, or bonding the single side of the second prefabricated shear wall with the wall body by using structural adhesive;
the fourth step: the through screw and the external steel plate are respectively anchored by nuts at two sides, or the bar-planting screw and the external steel plate are anchored by nuts at one side;
the fifth step: erecting a formwork at the prefabricated shear wall I or the prefabricated shear wall II and the floor slab slotted hole, then pouring grouting materials at the prefabricated shear wall hole and the floor slab slotted hole, and finishing the final reinforced structure after the grouting materials are cured; therefore, the upper and lower layers of prefabricated shear wall components are tightly combined together, and the seismic performance of the prefabricated shear wall is enhanced.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810915050.0A CN108952018B (en) | 2018-08-13 | 2018-08-13 | Reinforcing structure with disconnected sleeve grouting connecting steel bars inside prefabricated shear wall component and construction method thereof |
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| CN201810915050.0A CN108952018B (en) | 2018-08-13 | 2018-08-13 | Reinforcing structure with disconnected sleeve grouting connecting steel bars inside prefabricated shear wall component and construction method thereof |
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| CN108952018B true CN108952018B (en) | 2020-03-27 |
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| CN111350310B (en) * | 2020-03-04 | 2020-10-16 | 昆山市建设工程质量检测中心 | Reinforcing method for finding that steel bars at lower section in full grouting sleeve are cut off before grouting |
| CN113374180B (en) * | 2021-06-22 | 2023-03-31 | 姚攀峰 | Grouting sleeve connection concrete reinforcing structure and construction method |
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| CN105421810A (en) * | 2015-12-17 | 2016-03-23 | 北京筑福建筑事务有限责任公司 | Prefabricated panel reinforced masonry structure and construction method thereof |
| CN207525933U (en) * | 2017-11-13 | 2018-06-22 | 杭萧钢构股份有限公司 | A kind of steel plate combined shear wall splices node |
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| JPH08291642A (en) * | 1995-04-24 | 1996-11-05 | Taisei Corp | Pc building material against lighting and connection method thereof |
| JP2001254414A (en) * | 2000-03-09 | 2001-09-21 | Kiyoshi Kawashima | Remodeling method for drain pipe penetrating concrete building frame |
| CN101936046A (en) * | 2010-03-22 | 2011-01-05 | 吴淑环 | Heat preservation composite wall provided with meshed plaster on two sides |
| CN103362316B (en) * | 2013-07-09 | 2015-11-25 | 北京筑福国际工程技术有限责任公司 | A kind of enhancing jacket-type adding storey structure and reinforcement means thereof |
| CN103397705A (en) * | 2013-08-16 | 2013-11-20 | 威海建设集团股份有限公司 | Connection structure of building composite floor slab and steel bar truss shear wall |
| CN208918137U (en) * | 2018-08-13 | 2019-05-31 | 南京工业大学 | Reinforcing structure for cutting off connecting steel bars in grouting of sleeve inside prefabricated shear wall component |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105421810A (en) * | 2015-12-17 | 2016-03-23 | 北京筑福建筑事务有限责任公司 | Prefabricated panel reinforced masonry structure and construction method thereof |
| CN207525933U (en) * | 2017-11-13 | 2018-06-22 | 杭萧钢构股份有限公司 | A kind of steel plate combined shear wall splices node |
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Address after: 210000 No. 200, Gulou District, Jiangsu, Zhongshan North Road, Nanjing Co-patentee after: NANJING GONGDA CONSTRUCTION TECHNOLOGY Co.,Ltd. Patentee after: Nanjing Tech University Co-patentee after: JIANGSU TIANGONG BUILDING TECHNOLOGY GROUP Co.,Ltd. Address before: 210000, box 32, box 30, 8020 South Pearl Road, Pukou District, Jiangsu, Nanjing Co-patentee before: NANJING GONGDA CONSTRUCTION TECHNOLOGY Co.,Ltd. Patentee before: Nanjing Tech University Co-patentee before: JIANGSU TIANGONG BUILDING TECHNOLOGY GROUP Co.,Ltd. |
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