CN114922095B - Assembled light high-strength fiber composite construction support - Google Patents
Assembled light high-strength fiber composite construction support Download PDFInfo
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- CN114922095B CN114922095B CN202210271415.7A CN202210271415A CN114922095B CN 114922095 B CN114922095 B CN 114922095B CN 202210271415 A CN202210271415 A CN 202210271415A CN 114922095 B CN114922095 B CN 114922095B
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- 239000002131 composite material Substances 0.000 title claims abstract description 257
- 239000000835 fiber Substances 0.000 title claims abstract description 231
- 238000010276 construction Methods 0.000 title claims abstract description 61
- 241001669679 Eleotris Species 0.000 claims abstract description 26
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 7
- 239000004917 carbon fiber Substances 0.000 claims abstract description 7
- 239000003365 glass fiber Substances 0.000 claims abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000004873 anchoring Methods 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004642 transportation engineering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The assembled light high-strength fiber composite material construction support comprises a type II fiber composite material sleeper, a type I fiber composite material beam, a type-III fiber composite material pipe, a groove-shaped fiber composite material plate, a foundation anchoring bolt, a fiber composite material bolt and the like. The II-type fiber composite sleeper is fixed with the bottom layer bent cap through a foundation anchoring bolt; the assembled light high-strength fiber composite material construction support is mainly formed by mixing one or more of carbon fiber composite material profiles, basalt fiber composite material profiles and glass fiber composite material profiles. The fabricated light high-strength fiber composite material construction support is suitable for cast-in-situ construction operation of the capping beam with the cantilever length of more than 10m, and has the characteristics of high assembly speed, light support weight, sufficient resistance, reusability and wide application range.
Description
Technical Field
The invention belongs to the field of bridge engineering. In particular to the technical field of assembled light high-strength fiber composite material construction brackets.
Background
In recent years, with the rapid development of social economy in China and the continuous improvement of living standard of people, the maintenance quantity of vehicles and the requirement of people on travel are increasing, and bridge engineering is also paid attention to and paid importance as important node engineering in the field of transportation engineering. Especially in the urban bridge reconstruction and expansion engineering, the requirements of existing bridges, pipelines, under-bridge traffic requirements and municipal facilities are considered, the construction cost is saved, and the influence of construction period and noise is reduced. Therefore, when the bridge engineering design is carried out, a large cantilever bent cap structure is often adopted, so that the stress requirement of the upper structure can be met, and the driving space under the bridge can be enlarged.
The foundation below the cantilever end of the bent cap needs to be reinforced in the traditional full-hall floor stand construction, the technology is mature, but the treatment area is large, the cost is high, the bracket is erected and crossed with the existing road in the construction process, the traffic of vehicles is affected, and the situation is difficult to realize especially when the navigation clearance requirement exists under the bridge.
When the construction conditions can not meet the construction requirements of the floor stand, a pin rod type, hoop type or bracket type bracket structure can be adopted. However, in the actual construction process, a hole penetrating through the pier stud needs to be reserved by the pin method, and the bending resistance effect of the section of the pin is poor and the bearing capacity is low. When the anchor ear method is adopted for construction, the friction force between the anchor ear and the pier stud is difficult to control, anchor ear sliding accidents are easy to occur, the anchor ear sliding method is only suitable for piers with circular cross sections, and a large cantilever bent cap generally adopts square column type piers. The pre-buried bracket type support structure can influence pier shaft quality, and the bracket stretches out the length of pier shaft limited, can not satisfy the requirement to support deformation and intensity when big cantilever bent cap is under construction.
Despite decades of research and development, the technology and resistance level of bridge construction supports are greatly improved, but the degree of dependence on steel cannot be overcome. For the oversized cantilever bent cap in urban bridge reconstruction and expansion engineering, along with the increase of the span of the bent cap, the influence of the dead weight of a construction support is more remarkable, high requirements are put forward on joint welding quality, support installation process and the like, and particularly when the size and the span of the bent cap are large, the requirements of deformation, strength and the like of the construction support required by design specifications are difficult to meet.
The methods are not suitable for the operation without construction space under the oversized cantilever bent cap, and have the problems of difficult installation and disassembly of the construction bracket, and the like.
Disclosure of Invention
The invention is based on the expressway reconstruction and extension engineering of a certain city, and aims to provide an assembled light high-strength fiber composite material construction support, in particular to the construction operation of an oversized cantilever bent cap in the urban bridge reconstruction and extension engineering; the large-span bent cap construction support can be used for large-span bent cap construction operation with the cantilever length of more than 10m, and is an assembled light high-strength fiber composite material construction support with high assembly speed, small whole support quality, high resistance level, repeated utilization and wide application range.
The technical solution for realizing the purpose of the invention is as follows:
the construction support comprises an I-type fiber composite beam arranged on a bottom cover beam, wherein the I-type fiber composite beam comprises an I-type fiber composite beam, an I-type fiber composite upright post, an I-type fiber composite diagonal brace and an I-type fiber composite sleeper; the upper side of the capping beam is provided with at least two groups of I-shaped fiber composite material beams in parallel, the lower end face of the I-shaped fiber composite material beam positioned below is connected with the capping beam through a plurality of II-shaped fiber composite material sleepers which are arranged in parallel, the upper end face of the I-shaped fiber composite material beam positioned above is provided with a plurality of I-shaped fiber composite material sleepers in parallel, and a plurality of I-shaped fiber composite material upright posts which are arranged in parallel and I-shaped fiber composite material inclined struts which are arranged in inclined directions are clamped between the two groups of I-shaped fiber composite material beams;
a ∈type fiber composite material pipe is clamped between two groups of I-type fiber composite material beams, and the ∈type fiber composite material pipe comprises a plurality of ∈type fiber composite material upright posts, ∈type fiber composite material diagonal braces and ∈type fiber composite material beams which are arranged in parallel; the groove-shaped fiber composite plates are arranged in the inner cross mode of each ≡type fiber composite upright post, ≡type fiber composite inclined struts are arranged between the I-type fiber composite inclined struts and the I-type fiber composite upright posts, and ≡type fiber composite cross beams are arranged at the upper ends of two adjacent ≡type fiber composite upright posts.
Further, the II-type fiber composite sleeper is fixed with the bottom layer bent cap through foundation anchor bolts; the I-type fiber composite material cross beam is detachably and fixedly connected with the I-type fiber composite material upright post, the I-type fiber composite material diagonal brace and the I-type fiber composite material sleeper through fiber composite material bolts.
Further, the ≡type fiber composite upright post, the I type fiber composite diagonal brace and the groove-shaped fiber composite plate are detachably and fixedly connected through fiber composite bolts.
Further, the widths of flanges of the sections of the II-type fiber composite sleeper, the I-type fiber composite cross beam, the I-type fiber composite upright post, the I-type fiber composite diagonal brace and the I-type fiber composite sleeper are smaller than or equal to 0.5 times of the heights of webs, the thicknesses of the webs are larger than or equal to 10mm, and the heights of the webs are smaller than or equal to 400mm.
Further, the wall thickness of the grooved fiber composite plate is more than or equal to 10mm, the width of the flange is more than 0.3 times of the height of the web, and the width of the flange is less than or equal to 0.5 times of the height of the web.
Preferably, the fiber composite material section is formed by mixing a carbon fiber composite material, a basalt fiber composite material, a glass fiber composite material and one or more fiber composite materials.
Preferably, the fiber composite bolt 5 of the present invention is formed by mixing a carbon fiber composite material, a basalt fiber composite material, a glass fiber composite material, and one or more fiber composite materials thereof, and has a diameter of 20mm or more.
Compared with the prior art, the invention has the remarkable advantages that:
1. the resistance level is high, the assembling speed is high, and the device can be recycled.
The invention creatively provides an assembled light high-strength composite material construction bracket from two key points of improving the resistance level of the construction bracket and reducing the self weight of the construction bracket. The invention is formed by assembling a type II fiber composite material sleeper, a type I fiber composite material beam, a type I fiber composite material tube, a groove-shaped fiber composite material plate, a foundation anchoring bolt and a fiber composite material bolt, all components are prefabricated and formed in a factory, secondary processing and manufacturing are not needed, and construction errors caused by material damage and processing precision in the processing process can be effectively avoided. The advantages of good stability and high bearing capacity of the truss mechanism can be fully exerted, the construction speed of the support is improved, materials can be recycled, resources are saved, and the construction cost is reduced.
2. The construction support has light weight, high strength and advanced construction technology.
The invention adopts the fiber composite material to replace the traditional steel, and the density of the fiber composite material is only 1500-2000 kg/m 3 About 1/5 of the density of the traditional steel, 1/2 of the aluminum alloy material, and the tensile strength can reach more than 3000 MPa. The invention can greatly lighten the dead weight of the bracket, improve the rigidity and the bearing capacity of the bracket and save the material consumption. The construction method adopts a prefabricated assembly construction process, all prefabricated assemblies are manufactured in factories, the construction quality is easy to ensure, and the prefabricated assemblies are assembled together through assembly connectors after being transported to a construction site. Compared with the traditional construction method, the construction speed is obviously increased, and the construction difficulty and the construction cost are reduced.
3. The structure has good overall performance and wide application range.
The invention is designed from the light weight, adopts the combination mode of truss mechanism and fiber composite material beam in the aspect of structural style, greatly reduces the number of required components and improves the overall stability of the bracket. Under the condition of ensuring that the resistance level of the bracket is unchanged, the cross section width and thickness of the member are greatly reduced, the application range is wider, and the bracket is particularly suitable for the operation of the construction bracket with the cantilever length of the bent cap more than 10m in urban bridge reconstruction and expansion engineering.
Drawings
FIG. 1 is a block diagram of an elevation of an assembled lightweight high strength composite construction stand according to the present invention.
FIG. 2 is a plan view of the fabricated lightweight high strength composite construction stent of the present invention.
Fig. 3 is a cross-sectional view A-A of fig. 1.
Fig. 4 is a sectional view of B-B of fig. 1.
Fig. 5 is a cross-sectional view of fig. 1 taken along line C-C.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1, 2, 3, 4 and 5, an assembled light-weight high-strength fiber composite construction bracket is characterized in that: comprising an I-type fiber composite beam arranged on a bottom deck lid beam, the I-type fiber composite beam comprising an I-type fiber composite beam 21, an I-type fiber composite post 22, an I-type fiber composite diagonal 23, and an I-type fiber composite sleeper 24; at least two groups of I-shaped fiber composite material beams 21 are arranged above the bent cap in parallel, the lower end face of the I-shaped fiber composite material beam 21 positioned below is connected with the bent cap through a plurality of II-shaped fiber composite material sleepers 1 which are arranged in parallel, a plurality of I-shaped fiber composite material sleepers 24 are arranged on the upper end face of the I-shaped fiber composite material beam 21 positioned above in parallel, and a plurality of I-shaped fiber composite material upright posts 22 which are arranged in parallel and I-shaped fiber composite material diagonal struts 23 which are arranged obliquely are clamped between the two groups of I-shaped fiber composite material beams 21;
a ≡type fiber composite material pipe is clamped between the two groups of I-type fiber composite material beams 21, and comprises a plurality of ≡type fiber composite material upright posts 31, ≡type fiber composite material diagonal braces 32 and ≡type fiber composite material beams 33 which are arranged in parallel; the groove-shaped fiber composite plates 4 are arranged in the inner cross of each ≡type fiber composite upright 31, the ≡type fiber composite diagonal braces 32 are arranged between the I type fiber composite diagonal braces 23 and the I type fiber composite upright 22, and the ≡type fiber composite cross beams (33) are arranged at the upper ends of two adjacent ≡type fiber composite uprights 31.
The II-type fiber composite sleeper 1 and the bottom layer capping beam are detachably fixed through foundation anchor bolts 5, and the II-type fiber composite sleeper and the I-type fiber composite cross beam 21 are detachably fixed through fiber composite bolts 6. The I-type fiber composite cross beam 21, the I-type fiber composite upright 22, the I-type fiber composite diagonal bracing 23 and the I-type fiber composite sleeper 24 are detachably fixed through the fiber composite bolts 6. The ≡type fiber composite upright posts 31, the I type fiber composite diagonal braces 23 and the groove-shaped fiber composite plates 4 are detachably fixed through fiber composite bolts 6.
Preferably, the flange width of the cross section of the type II fiber composite sleeper 1, the type I fiber composite cross beam 21, the type I fiber composite upright 22, the type I fiber composite diagonal bracing 23 and the type I fiber composite sleeper 24 is smaller than or equal to 0.5 times of the web height, the thickness of the web is larger than or equal to 10mm, and the web height is smaller than or equal to 400mm.
Preferably, the channel-shaped fiber composite material plate 3 of the present invention has a wall thickness of 10mm or more, a flange width of 0.3 times or more, and a web height of 0.5 times or less.
Preferably, the fiber composite material section is formed by mixing a carbon fiber composite material, a basalt fiber composite material, a glass fiber composite material and one or more fiber composite materials.
Preferably, the fiber composite bolt 5 of the present invention is formed by mixing a carbon fiber composite material, a basalt fiber composite material, a glass fiber composite material, and one or more fiber composite materials thereof, and has a diameter of 20mm or more.
It is preferable that the wall thickness of the ≡fiber composite upright 31, ≡fiber composite diagonal bracing 32 and ≡fiber composite cross member 33 of the present invention be not less than 5mm.
The construction process of the fabricated light high-strength composite material construction bracket is briefly described by taking the following example:
according to the design requirements, the cross-section width, the height, the web thickness and the number of the II-type fiber composite sleeper 1 and the I-type fiber composite beam are defined, the number of the ≡type fiber composite pipes, the cross-section size and the wall thickness are defined, the number of the groove-shaped fiber composite plates 4, the cross-section size and the wall thickness are defined, and a component prefabrication construction scheme is formulated.
The type II fiber composite sleeper 1, the type I fiber composite cross beam 21, the type I fiber composite upright 22, the type I fiber composite diagonal bracing 23 and the type I fiber composite sleeper 24 are prefabricated in a factory. A ∈type fiber composite column 31, a ∈type fiber composite diagonal brace 32, a ∈type fiber composite beam 33, and a channel-shaped fiber composite plate 4.
The prefabricated and processed II-type fiber composite sleeper 1, I-type fiber composite beams, the tube of the ∈type fiber composite material and the groove-shaped fiber composite plate 4 in a factory are transported to a construction site, the II-type fiber composite sleeper 1 is fixed on the upper surface of a bottom cover beam by using foundation anchor bolts 5, and then the I-type fiber composite cross beam 21 and the II-type fiber composite sleeper 1 are assembled together by using the fiber composite bolts 6.
The I-shaped fiber composite upright post 22 and the I-shaped fiber composite diagonal bracing 23 are assembled together through the fiber composite bolt 6; the I-type fiber composite upright post 22 and the I-type fiber composite diagonal brace 23 are respectively combined with the ≡type fiber composite diagonal brace 32 through the fiber composite bolt 6;
transversely assembling the fiber composite truss sheet assembled in the step (4) with the ≡fiber composite cross beam 33 through the fiber composite bolts 6; and (3) assembling the groove-shaped fiber composite material plates 4 and the fiber composite material truss sheets assembled in the step (4) together through the fiber composite material bolts 6.
The ≡type fiber composite upright 31 and the ≡type fiber composite cross member 33 are assembled together by the fiber composite bolts 6, and then the groove-shaped fiber composite plate 4 is assembled together with the ≡type fiber composite upright 31 and the ≡type fiber composite cross member 33 described above by the fiber composite bolts 6.
And (3) hoisting the fiber composite truss structure assembled in the step (5) and the step (6) to the outer sides of the left pier and the right pier and the middle position of the two piers respectively, and fixing the fiber composite truss structure and the I-shaped fiber composite beam 21 in the step (3) together through the fiber composite bolt 6.
And (3) assembling the truss structure assembled in the step (7) with the I-shaped fiber composite cross beam 21 at the top of the high-strength fiber composite bracket through the fiber composite bolts 6, and then assembling the I-shaped fiber composite sleeper 24 with the I-shaped fiber composite cross beam 21 through the fiber composite bolts 6.
Checking the erection position of the high-strength fiber composite material construction support member, performing fastening check on the fiber composite material bolt 6, determining whether the maximum deformation of the cantilever end of the support meets the requirement of the specification after meeting the construction requirement of the high-strength fiber composite material support, and finishing the construction.
The foregoing examples are more specific and detailed and represent but one possible embodiment of the invention and are not intended to limit the scope of the present invention. It should be pointed out that, within the framework of the present invention, the scientific researchers and engineering personnel can add several variations or modifications on the basis of the present embodiment, but these are all within the scope of protection of the present patent, which is subject to the claims.
Claims (7)
1. The utility model provides an assembled light high strength fiber composite construction support which characterized in that: the composite material comprises an I-type fiber composite material beam arranged on a bottom cover beam, wherein the I-type fiber composite material beam comprises an I-type fiber composite material beam (21), an I-type fiber composite material upright post (22), an I-type fiber composite material diagonal brace (23) and an I-type fiber composite material sleeper (24); at least two groups of I-shaped fiber composite material beams (21) are arranged above the bent cap in parallel, the lower end face of the I-shaped fiber composite material beam (21) positioned below is connected with the bent cap through a plurality of II-shaped fiber composite material sleepers (1) which are arranged in parallel, a plurality of I-shaped fiber composite material sleepers (24) are arranged on the upper end face of the I-shaped fiber composite material beam (21) positioned above in parallel, and a plurality of I-shaped fiber composite material upright posts (22) which are arranged in parallel and I-shaped fiber composite material diagonal struts (23) which are arranged in an inclined mode are clamped between the two groups of I-shaped fiber composite material beams (21);
clamping a mouth-shaped fiber composite material pipe between two groups of I-shaped fiber composite material beams (21), wherein the mouth-shaped fiber composite material pipe comprises a plurality of mouth-shaped fiber composite material upright posts (31), mouth-shaped fiber composite material diagonal braces (32) and mouth-shaped fiber composite material beams (33) which are arranged in parallel; the inside of each mouth-shaped fiber composite upright post (31) is crosswise provided with a groove-shaped fiber composite plate (4), a mouth-shaped fiber composite diagonal brace (32) is arranged between the I-shaped fiber composite diagonal brace (23) and the I-shaped fiber composite upright post (22), and the upper ends of two adjacent mouth-shaped fiber composite upright posts (31) are provided with mouth-shaped fiber composite cross beams (33).
2. The fabricated lightweight high strength fiber composite construction stent of claim 1, wherein: the II-type fiber composite sleeper (1) is fixed with the bottom layer bent cap through foundation anchor bolts (5); the I-shaped fiber composite material cross beam (21) is detachably and fixedly connected with the I-shaped fiber composite material upright post (22), the I-shaped fiber composite material diagonal brace (23) and the I-shaped fiber composite material sleeper (24) through the fiber composite material bolt (6).
3. The fabricated lightweight high strength fiber composite construction stent of claim 1, wherein: the mouth-shaped fiber composite upright post (31) is detachably and fixedly connected with the I-shaped fiber composite diagonal brace (23) and the groove-shaped fiber composite plate (4) through fiber composite bolts (6).
4. The fabricated lightweight high strength fiber composite construction stent of claim 1, wherein: the flange width of the cross section of the II-type fiber composite sleeper (1), the I-type fiber composite cross beam (21), the I-type fiber composite upright post (22), the I-type fiber composite diagonal brace (23) and the I-type fiber composite sleeper (24) is smaller than or equal to 0.5 times of the web height, the thickness of the web is larger than or equal to 10mm, and the web height is smaller than or equal to 400mm.
5. The fabricated lightweight high strength fiber composite construction stent of claim 1, wherein: the wall thickness of the groove-shaped fiber composite material plate (4) is more than or equal to 10mm, the width of the flange is more than 0.3 times of the height of the web, and the width of the flange is less than or equal to 0.5 times of the height of the web.
6. The fabricated lightweight high strength fiber composite construction stent of claim 1, wherein: the fiber composite material section is formed by mixing one or more fiber composite materials of a carbon fiber composite material, a basalt fiber composite material and a glass fiber composite material.
7. A fabricated lightweight high strength fiber composite construction stent according to claim 2 or 3, wherein: the fiber composite bolt (6) is formed by mixing one or more fiber composite materials of a carbon fiber composite material, a basalt fiber composite material and a glass fiber composite material, and the diameter of the fiber composite material is larger than or equal to 20mm.
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CN202210271415.7A CN114922095B (en) | 2022-03-18 | 2022-03-18 | Assembled light high-strength fiber composite construction support |
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CN114922095B true CN114922095B (en) | 2024-02-13 |
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