CN114439266A - Reinforcing device for reinforcing shear wall by adhering steel plates and construction method - Google Patents
Reinforcing device for reinforcing shear wall by adhering steel plates and construction method Download PDFInfo
- Publication number
- CN114439266A CN114439266A CN202210103380.6A CN202210103380A CN114439266A CN 114439266 A CN114439266 A CN 114439266A CN 202210103380 A CN202210103380 A CN 202210103380A CN 114439266 A CN114439266 A CN 114439266A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- shear wall
- steel
- construction method
- concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 112
- 239000010959 steel Substances 0.000 title claims abstract description 112
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 22
- 239000003292 glue Substances 0.000 claims abstract description 36
- 238000005498 polishing Methods 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 3
- 239000000565 sealant Substances 0.000 claims abstract description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 229920000742 Cotton Polymers 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 2
- 238000005429 filling process Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention provides a construction method for reinforcing a shear wall by sticking steel plates, which relates to the technical field of buildings and comprises the following steps: s1: designing the blanking size of the steel plate according to design requirements; s2: after blanking the steel plate, drilling holes on the steel plate according to design requirements; s3: polishing by using a flat grinding wheel, and removing and polishing the surface of the steel plate; s4: embedding iron wires with the diameter of 2-3 mm between the steel plates and the concrete surface; s5: sealing the edge of the steel plate by using a seam sealing agent; s6: and after the sealant is cured, pouring glue.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a reinforcing device for reinforcing a shear wall by adhering steel plates and a construction method.
Background
When the vertical bearing member in the building is mainly born by the wall body, the wall body bears the vertical load transmitted by the horizontal member and simultaneously bears the horizontal earthquake action transmitted by wind power or earthquake action, and the shear wall is named accordingly. Shear walls are dividing walls and enclosing walls of buildings, so the arrangement of the walls must meet the requirements of both building floor arrangement and structural arrangement. The shear wall structure system has good bearing capacity, good integrity and space function, and better lateral force resistance than a frame structure, so that a higher building can be built.
The shear wall of the prior building needs to be reinforced to meet the requirements of more environments, the conventional reinforcement usually adopts a bonded steel plate to reinforce the shear wall, the structure is relatively complex, the installation operation difficulty is high, and the construction process is relatively complicated.
Disclosure of Invention
The invention aims to provide a construction method for reinforcing a shear wall by sticking a steel plate, which is used for realizing the technical effects of improving the efficiency of sticking the steel plate, simplifying the construction process and improving the firmness.
The invention is realized by the following technical scheme:
the method comprises the following steps:
s1: designing the blanking size of the steel plate according to the design requirement;
s2: after blanking the steel plate, drilling holes on the steel plate according to design requirements;
s3: polishing by using a flat grinding wheel, and removing and polishing the surface of the steel plate;
s4: embedding iron wires with the diameter of 2-3 mm between the steel plates and the concrete surface;
s5: sealing the edge of the steel plate by using a seam sealing agent;
s6: and after the sealant is cured, performing glue pouring.
In order to better implement the present invention, further,
in said S3: and (3) polishing the roughness of the steel plate, wherein the polishing lines are vertical to the stress direction of the steel plate, then wiping the steel plate clean by using absorbent cotton and dipping the absorbent cotton in acetone, and cleaning the bonding surface of the steel plate by using absolute ethyl alcohol or acetone.
In order to better implement the present invention, further,
the concrete surface treatment method further comprises concrete surface treatment, and the concrete treatment process comprises the following steps:
and (4) snapping lines at a specified position according to design requirements, and lofting the position where the steel plate needs to be adhered and the position of a drilling bolt on the concrete structure.
In order to better implement the present invention, further,
the method comprises the following steps of completely removing a mortar painting layer from the concrete surface to which the steel plate needs to be adhered to enable the structure to be completely exposed, grinding the concrete by using an angle grinder until a new surface of the concrete is exposed, blowing off powder particles by using oil-free compressed air, and wiping the surface by using absorbent cotton to be soaked in absolute ethyl alcohol or acetone after the concrete is completely dried.
In order to better implement the present invention, further,
and grinding the concrete by using an angle grinder to remove a surface layer with the thickness of 2-3 mm.
In order to better implement the present invention, further,
the step S6 glue filling further comprises the following steps:
s61: preparing structural adhesive;
s62: and (5) pouring glue from one end to the other end in the glue pouring sequence, and pouring glue from the lower part to the upper part.
In order to better implement the present invention, further,
in step S6, in the glue filling process, the second glue filling point is located behind the first glue filling point, and the second glue filling point can be filled when the first glue filling point is discharged.
In order to better implement the present invention, further,
the steel plate processing area is ground on the periphery of the shear wall, the steel plate is arranged on the shear wall processing area, angle steel or straight steel is further arranged between the shear wall and the steel plate, the angle steel is arranged at the end part and the corner of the shear wall, and the straight steel is arranged at the horizontal position of the shear wall.
In order to better implement the present invention, further,
the steel plate with all be equipped with the through-hole between the shear force wall, still be equipped with split bolt, split bolt passes the through-hole is fixed with the steel plate, shear force wall and angle steel or straight steel fixed connection.
The invention has the beneficial effects that:
the method for reinforcing the shear wall by sticking the steel plates, provided by the invention, comprises the steps of processing the concrete shear wall, then blanking the steel plates on the shear wall, drilling, pouring glue and the like.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings that are required to be used in the present invention will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and it will be apparent to those skilled in the art that other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic structural diagram of a reinforcing apparatus for reinforcing a shear wall by adhering a steel plate according to the present invention;
FIG. 2 is a top view of a reinforcing apparatus for reinforcing a shear wall by adhering a steel plate according to the present invention;
an icon: 100-shear wall, 110-steel plate, 120-split bolt, 130-straight steel and 140-angle steel.
Detailed Description
The technical solution of the present invention will be described below with reference to the accompanying drawings.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to FIGS. 1-2,
the invention provides a construction method for reinforcing a shear wall by sticking steel plates, which mainly comprises the following steps:
surface treatment of the concrete beam:
and (4) snapping a line at a specified position according to design requirements, and lofting the position needing to be bonded with steel and the position of a drilling bolt on the original concrete structure.
And (3) completely removing the mortar painting layer from the concrete surface to which the steel plate needs to be adhered to enable the structural layer to be completely exposed, polishing the concrete by using an angle grinder, removing the surface layer with the thickness of 2-3 mm until a new surface of the concrete is exposed, blowing off powder particles by using oil-free compressed air, and wiping the surface by using absorbent cotton dipped with absolute alcohol or acetone after the concrete is completely dried.
Treatment and blanking of steel sheets
And calculating the blanking size of the steel plate according to the design requirement.
And (4) blanking the steel plate, and drilling holes on the steel plate according to design requirements.
And then, polishing by using a flat grinding wheel, removing the rust on the surface of the steel plate and roughening, wherein the larger the polishing roughness is, the better the polishing roughness is, the polishing lines are perpendicular to the stress direction of the steel plate, and then wiping the steel plate clean by using absorbent cotton dipped with acetone.
And cleaning the bonding surface of the steel plate by absolute ethyl alcohol or acetone.
Reinforcing treatment of bonded steel plate
Embedding phi 2 ~ 3mm iron wire between steel sheet and the concrete surface, then carrying out the banding with the steel sheet, the banding adopts special joint sealing glue to seal, and the glue filling pipe interval 300mm to at steel sheet both sides staggered arrangement. In addition, the thickness of the reinforcing colloid is further ensured by iron wires.
Pouring after the joint sealing glue is solidified
The glue filling is carried out by adopting an air compressor, and the construction process of the glue filling is as follows:
the structural adhesive is prepared in a trial mode according to the proportion required by a manufacturer of the structural adhesive, and a large amount of structural adhesive can be prepared under the condition that the proportion is suitable for construction, so that the next construction can be carried out.
The glue pouring sequence must be constructed according to the sequence of pouring glue from one end to the other end and pouring glue from the lower part to the upper part.
The second glue filling point can be replaced when the first glue filling point is used for dispensing glue, and the like.
And after all beam bottoms are reinforced and checked to be qualified, the next construction procedure can be carried out.
The main items of the construction process are as follows:
the raw materials for preparing the binder should be stored in a sealed manner and away from a fire source to avoid direct sunlight irradiation.
The formulation and use sites must be kept well ventilated.
The operator should wear the working clothes and hide the protective mask and gloves.
The workplace should be equipped with various necessary fire extinguishers for rescue.
Before the part to be reinforced is pasted, live load on the reinforcing component is removed.
The surface of the member must be dried, and if there is a wet portion, drying or the like must be performed.
The appearance inspection method of the pasting quality comprises the following steps:
checking the pasting position, size, adhesive cement appearance curing condition and the like of the steel bonding pair according to a construction drawing; the curing degree of the glue is checked by marking with iron nails;
after the colloid is solidified, a small hammer is used for lightly knocking the bonding steel plate, the bonding effect is judged from a sound box or the bonding compactness is detected by an ultrasonic method, if the bonding area of the anchoring area is not less than 90 percent, the bonding area of the non-anchoring area is not less than 70 percent, and if not, the bonding part is peeled off without effect and is bonded again.
The method for reinforcing the shear wall by sticking the steel plates, provided by the invention, comprises the steps of processing the concrete shear wall, then blanking the steel plates on the shear wall, drilling, pouring glue and the like.
The invention also provides a reinforcing device, as shown in the figure, the reinforcing device comprises a shear wall 100, a steel plate 110 processing area is ground on the periphery of the shear wall, the steel plate 100 is arranged on the shear wall processing area, angle steel 140 or straight steel 130 is further arranged between the shear wall 100 and the steel plate 110, the angle steel 140 is arranged at the end part and the corner of the shear wall 100, and the straight steel 130 is arranged at the horizontal position of the shear wall.
Through holes are formed between the steel plate 110 and the shear wall 100, and split bolts 120 are further arranged, and the split bolts 120 penetrate through the through holes to fix and connect the steel plate 110, the shear wall 100 and angle steel 140 or straight steel 130.
The reinforcing device mainly comprises a steel plate 110 processing area which is arranged on the periphery of the shear wall 100 and is ground, angle steel 140 or straight steel 130 is arranged between the steel plate 110 and the shear wall 100, a through hole is formed between the steel plate 110 and the shear wall 100, the steel plate 110 and the shear wall 100 are fixedly connected through a split bolt 120, and the glue pouring can be arranged between the steel plate 110 and the shear wall 100.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A construction method for reinforcing a shear wall by sticking steel plates is characterized in that,
the method comprises the following steps:
s1: designing the blanking size of the steel plate according to the design requirement;
s2: after blanking the steel plate, drilling holes on the steel plate according to design requirements;
s3: polishing by using a flat grinding wheel, and removing and polishing the surface of the steel plate;
s4: embedding iron wires with the diameter of 2-3 mm between the steel plates and the concrete surface;
s5: sealing the edge of the steel plate by using a seam sealing agent;
s6: and after the sealant is cured, performing glue pouring.
2. The construction method of the shear wall reinforced by the adhered steel plates according to claim 1,
in said S3: and (3) polishing the roughness of the steel plate, wherein the polishing lines are vertical to the stress direction of the steel plate, then wiping the steel plate clean by using absorbent cotton and dipping the absorbent cotton in acetone, and cleaning the bonding surface of the steel plate by using absolute ethyl alcohol or acetone.
3. The construction method of the shear wall reinforced by the adhered steel plates according to claim 2,
the concrete surface treatment method further comprises concrete surface treatment, and the concrete treatment process comprises the following steps:
and (4) snapping lines at a specified position according to design requirements, and lofting the position where the steel plate needs to be adhered and the position of a drilling bolt on the concrete structure.
4. The construction method of the shear wall reinforced by the adhered steel plates according to claim 3,
the method comprises the following steps of completely removing a mortar painting layer from the concrete surface to which the steel plate needs to be adhered to enable the structure to be completely exposed, grinding the concrete by using an angle grinder until a new surface of the concrete is exposed, blowing off powder particles by using oil-free compressed air, and wiping the surface by using absorbent cotton to be soaked in absolute ethyl alcohol or acetone after the concrete is completely dried.
5. The construction method of the shear wall reinforced by the adhered steel plates according to claim 4,
and grinding the concrete by using an angle grinder to remove a surface layer with the thickness of 2-3 mm.
6. The construction method of the shear wall reinforced by the adhered steel plates according to any one of claims 1 to 5,
the step S6 glue filling further comprises the following steps:
s61: preparing structural adhesive;
s62: and (5) pouring glue from one end to the other end in the glue pouring sequence, and pouring glue from the lower part to the upper part.
7. The construction method of the shear wall reinforced by the adhered steel plates according to claim 6,
in step S6, in the glue filling process, the second glue filling point is located behind the first glue filling point, and the second glue filling point can be filled when the first glue filling point is discharged.
8. The construction method of the shear wall reinforced by the adhered steel plates according to claim 7,
the steel plate processing area is ground on the periphery of the shear wall, the steel plate is arranged on the shear wall processing area, angle steel or straight steel is further arranged between the shear wall and the steel plate, the angle steel is arranged at the end part and the corner of the shear wall, and the straight steel is arranged at the horizontal position of the shear wall.
9. The construction method of the shear wall reinforced by the adhered steel plates according to claim 8,
the steel plate with all be equipped with the through-hole between the shear force wall, still be equipped with split bolt, split bolt passes the through-hole is fixed with the steel plate, shear force wall and angle steel or straight steel fixed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210103380.6A CN114439266A (en) | 2022-01-27 | 2022-01-27 | Reinforcing device for reinforcing shear wall by adhering steel plates and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210103380.6A CN114439266A (en) | 2022-01-27 | 2022-01-27 | Reinforcing device for reinforcing shear wall by adhering steel plates and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114439266A true CN114439266A (en) | 2022-05-06 |
Family
ID=81369121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210103380.6A Pending CN114439266A (en) | 2022-01-27 | 2022-01-27 | Reinforcing device for reinforcing shear wall by adhering steel plates and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114439266A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961320A (en) * | 2022-06-01 | 2022-08-30 | 合肥水泥研究设计院有限公司 | Building design engineering is with consolidating construction equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510965A (en) * | 2013-09-30 | 2014-01-15 | 招商局重庆交通科院设计院有限公司 | Highway tunnel lining surface sticky steel strip strengthening method and device |
| CN106401205A (en) * | 2016-09-06 | 2017-02-15 | 中交第航务工程局有限公司 | Construction method for reinforcement of externally bonded profile steel of reinforced concrete structure |
| CN206053396U (en) * | 2016-08-01 | 2017-03-29 | 国家开放大学 | A kind of compound binding agent affixing steel plate reinforcement shears the construction of wall opening |
| CN207673041U (en) * | 2017-12-26 | 2018-07-31 | 江苏意统加固行工程有限公司 | A kind of existing reinforced concrete chainless drives increase the ruggedized construction of stealthy beam |
| CN109812046A (en) * | 2019-03-27 | 2019-05-28 | 中建四局第一建筑工程有限公司 | One kind is to pull-type steel plate shear force wall strengthening construction structure and method |
-
2022
- 2022-01-27 CN CN202210103380.6A patent/CN114439266A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510965A (en) * | 2013-09-30 | 2014-01-15 | 招商局重庆交通科院设计院有限公司 | Highway tunnel lining surface sticky steel strip strengthening method and device |
| CN206053396U (en) * | 2016-08-01 | 2017-03-29 | 国家开放大学 | A kind of compound binding agent affixing steel plate reinforcement shears the construction of wall opening |
| CN106401205A (en) * | 2016-09-06 | 2017-02-15 | 中交第航务工程局有限公司 | Construction method for reinforcement of externally bonded profile steel of reinforced concrete structure |
| CN207673041U (en) * | 2017-12-26 | 2018-07-31 | 江苏意统加固行工程有限公司 | A kind of existing reinforced concrete chainless drives increase the ruggedized construction of stealthy beam |
| CN109812046A (en) * | 2019-03-27 | 2019-05-28 | 中建四局第一建筑工程有限公司 | One kind is to pull-type steel plate shear force wall strengthening construction structure and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961320A (en) * | 2022-06-01 | 2022-08-30 | 合肥水泥研究设计院有限公司 | Building design engineering is with consolidating construction equipment |
| CN114961320B (en) * | 2022-06-01 | 2023-08-04 | 合肥水泥研究设计院有限公司 | Reinforcing construction device for building design engineering |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1978843A (en) | Construction method for reinforcing steel-bar net mortar thin layer | |
| CN114439266A (en) | Reinforcing device for reinforcing shear wall by adhering steel plates and construction method | |
| CN109162473B (en) | Device and method for repairing vertical concrete cracks by using high-ductility cement-based material | |
| US5597627A (en) | Stone product in sheet form, method for its manufacture and appropriate means | |
| CN103510965A (en) | Highway tunnel lining surface sticky steel strip strengthening method and device | |
| CN110593600A (en) | Beam-slab reinforcing structure of existing building and construction method | |
| CN208884775U (en) | A kind of steel construction assembling type outer wall system of wet process filling | |
| CN206752738U (en) | A kind of factory building noise reduction environmental protection soundproof wall being easily installed | |
| CN106439395A (en) | Method for constructing insulating layer in air duct made of iron sheet | |
| CN216892991U (en) | L-shaped connecting structure of light steel keel wall | |
| CN102518315B (en) | Multistory & high-rise frame space nodes He Xin district PC reinforcement steel bars device | |
| CN115182615A (en) | Carbon fiber reinforcing method for assembled multifunctional ward floor bearing plate | |
| CN206801841U (en) | The composite support pad of vibration insulation and noise reduction and high-rise water pump | |
| CN209397704U (en) | A kind of intelligence steel building house | |
| CN104631714B (en) | A kind of construction method of sensor levels suspended deck structure | |
| CN211114954U (en) | Beam slab reinforcing structure of existing building | |
| CN210049419U (en) | External wall insulation board mounting structure | |
| CN107201805A (en) | Computer room sound-absorbing coating structure and its construction method | |
| CN219535953U (en) | Photovoltaic support connection structure | |
| CN213199837U (en) | Aerated concrete block production conveying equipment | |
| CN217998885U (en) | Exterior wall coating construction platform | |
| CN213297255U (en) | Prefabricated floor reinforcing structure | |
| CN219327321U (en) | Telescopic angle steel plugging device for root of aluminum alloy shear wall template | |
| CN218028646U (en) | Large-size ceramic thin plate structure | |
| CN220319005U (en) | Environment-friendly fluorine-free heat preservation material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220506 |
|
| RJ01 | Rejection of invention patent application after publication |