CN117127755A - Bamboo-like outer constraint support tube concrete column - Google Patents
Bamboo-like outer constraint support tube concrete column Download PDFInfo
- Publication number
- CN117127755A CN117127755A CN202311237528.6A CN202311237528A CN117127755A CN 117127755 A CN117127755 A CN 117127755A CN 202311237528 A CN202311237528 A CN 202311237528A CN 117127755 A CN117127755 A CN 117127755A
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- bamboo
- outer constraint
- concrete
- constraint support
- support tube
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- 239000004567 concrete Substances 0.000 title claims abstract description 111
- 239000011425 bamboo Substances 0.000 claims abstract description 43
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 42
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 42
- 241001330002 Bambuseae Species 0.000 claims abstract description 42
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 42
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 30
- 239000002910 solid waste Substances 0.000 claims abstract description 21
- 239000007787 solid Substances 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 52
- 239000010959 steel Substances 0.000 claims description 52
- 238000004873 anchoring Methods 0.000 claims description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 238000000748 compression moulding Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 229910000601 superalloy Inorganic materials 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000012634 fragment Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000011218 segmentation Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000006063 cullet Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a bamboo-like outer constraint support tube concrete column which comprises outer constraint support tubes and concrete poured inside, wherein the outer constraint support tubes are spliced and fixed in a segment mode, bamboo joint reinforcing steel bars are arranged between adjacent segments of the outer constraint support tubes and are arranged in the tubes, integral filling blocks are arranged inside each outer constraint support tube segment, the concrete is poured in a cavity between the outer surfaces of the integral filling blocks and the inner walls of the outer constraint support tubes, the concrete between the side surfaces of the integral filling blocks and the inner walls of the outer constraint support tubes is in a bamboo tube hollow structure, and the concrete between the adjacent segments of the outer constraint support tubes and the bamboo joint reinforcing steel bars form a bamboo joint solid structure together. The bamboo-like outer constraint support pipe concrete column has higher structural strength and lighter structural dead weight, can better treat and utilize solid waste, reduces the using amount of concrete, avoids casting concrete by a mould, improves the economic benefit of a building, and realizes the aim of sustainable development of the building by trampling the concept of a green building.
Description
Technical Field
The invention provides a bamboo-like outer constraint support tube concrete column, and belongs to novel concrete support structures.
Background
With the aggravation of the environmental pollution problem, people are deeply and deeply aware of the importance of protecting the environment, and countries are also greatly pushing the implementation of the green building concept. However, in the building industry, a large amount of solid waste which is difficult to degrade is accumulated year by year, and the low utilization rate of the solid waste leads to the fact that a large amount of solid waste cannot be recycled.
The external constraint support tube concrete structure is a novel building structure form combining high compressive strength of concrete and strong bending resistance of the external constraint support tube, the two functions together, the bearing capacity of the building structure is greatly improved, and the building structure form is more and more widely applied. As the outer constraint support tube of the concrete column, a steel tube, a carbon fiber tube, a high-performance alloy tube, etc. are more common, and among them, a steel tube is the most common one. However, the outer constraint support pipe concrete structure has a large amount of concrete usage and a large structure weight. Therefore, the mechanical property of the external constraint support tube concrete structure is further improved while the performance advantages of the two materials of the concrete and the external constraint support tube are fully exerted, the dead weight of the structure is lightened, and the building economic benefit is improved, so that the technical problem of popularization and application of the external constraint support tube concrete structure is solved.
Disclosure of Invention
The invention solves the technical problems that: aiming at the problem of heavy self weight of the existing steel tube concrete structure, the bamboo-like outer constraint support tube concrete column is provided.
The invention is realized by adopting the following technical scheme:
the utility model provides an imitative outer constraint stay tube concrete column of bamboo, includes outer constraint stay tube 1 and the concrete 5 of inside pouring, outer constraint stay tube 1 is fixed with the concatenation of segmentation form, is equipped with bamboo joint reinforcing bar 2 in intraductal between its adjacent segmentation, and the inside of every outer constraint stay tube 1 segmentation is equipped with whole filling block 4, concrete 5 pours in the cavity between whole filling block 4 surface and outer constraint stay tube 1 inner wall, the concrete between whole filling block 4 side surface and the outer constraint stay tube 1 inner wall is the hollow structure of thick bamboo tube, the solid structure of bamboo joint is constituteed jointly with bamboo joint reinforcing bar to the concrete between the adjacent segmentation of outer constraint stay tube 1.
In the bamboo-like outer constraint support pipe concrete column, at least one integral filling block 4 is further arranged in each section along the axial direction, and the integral filling blocks 4 are fixedly connected with bamboo joint reinforcing steel bars 2 at two ends of the outer constraint support pipe section.
In the bamboo-like outer constraint support pipe concrete column of the present invention, further, the integral filling block 4 may be a cylindrical, spherical or ellipsoidal block structure made of solid waste, and the solid waste includes, but is not limited to, plastics, broken glass, ceramic chips, bricks, broken stone, slag, concrete fragments, waste steel, etc.
In the bamboo-like outer constraint support tube concrete column, further, the round curved surface chamfer is arranged at the folded corner of the outer surface of the integral filling block 4, so that the phenomenon that the concrete 5 wraps the integral filling block 4 to form a sharp angle is avoided, and the stress concentration phenomenon after the concrete is formed is reduced.
In the bamboo-like outer constraint support pipe concrete column, further, the integral filling block 4 is formed by fusion bonding, integral compression forming or wrapping and fixing forming.
In the bamboo-like outer constraint support pipe concrete column, the integral filling block 4 is further connected and fixed with the bamboo joint reinforcing steel bars 2 through the fixed connecting piece 3, one end of the fixed connecting piece 3 is provided with an anchoring piece 31 embedded into the integral filling block 4, and the other end of the fixed connecting piece is connected and fixed with the center of the bamboo joint reinforcing steel bars 2.
In the bamboo-like outer constraint support tube concrete column, further, the bamboo joint steel bars 2 are welded into a central symmetry steel bar frame by adopting a plurality of equal length steel bars and fixed on the inner wall of the outer constraint support tube 1, the bamboo joint steel bars 2 support and fix the integral filling blocks 4 in the concrete pouring process, and the bamboo joint steel bars participate in structural stress after the concrete is solidified.
In the bamboo-like outer constraint support tube concrete column, further, the concrete 5 is high-flow concrete, is vertically poured along the outer constraint support tube, automatically fills the cavity in the outer constraint support tube, and can be compacted without vibrating.
In the bamboo-like outer constraint support pipe concrete column, the outer constraint support pipe 1 is a steel pipe, a carbon fiber pipe or a high-performance alloy pipe.
In the bamboo-like outer constraint support tube concrete column, further, the inner wall of the outer constraint support tube 1 is subjected to rough surface treatment by threads, so that the bonding capability of the inner wall of the outer constraint support tube and the concrete 5 is improved, and the mechanical property of the whole structure is improved.
In the scheme of the bamboo-like outer constraint support tube concrete column, in an annular pouring space surrounded by the integral filling blocks and the outer constraint support tubes, concrete between the side surfaces of the integral filling blocks and the inner walls of the outer constraint support tubes is of a bamboo tube hollow structure, the concrete between adjacent sections of the outer constraint support tubes and bamboo joint reinforcing steel bars form a bamboo joint solid structure together, the whole outer constraint support tube concrete structure forms a bamboo-like structure, and solid wastes filled in the whole outer constraint support tube concrete structure are combined to form the main body technical scheme of the bamboo-like outer constraint support tube concrete column.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the solid waste is used as an integral filling block, so that plastics, broken glass, ceramic fragments, tiles, broken stone, slag soil, concrete fragments, waste iron and steel and the like which are difficult to degrade in nature can be effectively absorbed, waste utilization can be realized, and environmental protection is facilitated; the inner wall of the external constraint support tube, the outer surface of the solid waste and the like form a mould for pouring concrete, so that the concrete pouring template-free can be realized, the construction cost is reduced, the economy is improved, and the implementation of the green building concept is facilitated; after concrete is poured, the bamboo joint reinforcing steel bars and the bamboo joint solid structure formed by the adjacent concrete can improve the local buckling resistance of the structure, so that the overall bearing capacity is improved, and the overall performance of the external constraint support tube concrete column is improved.
In conclusion, the bamboo-like outer constraint support pipe concrete column fully exerts the performance advantages of the outer constraint support pipe and concrete, simultaneously better processes and recycles solid waste, reduces the use amount of the concrete, reduces the construction cost, improves the economic benefit of the building, and realizes the aim of sustainable development of the building by practicing the concept of green building.
The invention is further described below with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a schematic perspective view of a bamboo-like outer constraint support tube concrete column of an embodiment.
Fig. 2 is a longitudinal interior view of an example bamboo-like outer constraint support tube concrete column.
Fig. 3 is a transverse internal view of the bamboo-like outer constraint support tube concrete column of the embodiment.
Reference numerals in the drawings: the concrete-filled steel tube comprises a 1-external constraint supporting tube, 2-bamboo joint reinforcing steel bars, 3-fixed connecting pieces, 31-anchoring pieces, 4-integral filling blocks and 5-concrete.
Detailed Description
Examples
In order to make the technical means, creation characteristics, achievement of the purpose and effect of the present invention implementation easy to understand, the present invention is further described below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description is presented herein for purposes of illustration only and is not intended to limit the invention.
Referring to fig. 1, 2 and 3, the bamboo-like outer constraint support pipe concrete column in the drawings is a specific implementation scheme of the invention, and specifically comprises an outer constraint support pipe 1, bamboo joint reinforcing steel bars 2, fixed connecting pieces 3, integral filling blocks 4 and concrete 5, wherein the outer constraint support pipe 1 is generally a steel pipe, and a structural main body is a steel pipe concrete structure. The steel pipe is spliced and fixed in a segment form, and the length of each segment of the steel pipe segment can be determined according to design or construction, and is generally recommended to be not less than 3m. Inside between adjacent steel pipe sections, bamboo joint reinforcing steel bars 2 are fixed through welding. The interior of each steel pipe segment is provided with integral packing blocks 4, the integral packing blocks 4 not being discrete particles, but being of integral block-like construction arranged along the axis of the steel pipe. Concrete 5 is poured in the cavity between the outer surface of the integral filling block 4 and the inner wall of the steel pipe, wherein the concrete structure formed between the side surface of the integral filling block 4 and the inner wall of the steel pipe is a bamboo tube hollow structure, the concrete structure formed between the steel pipe sections and the buried bamboo joint reinforcing steel bars jointly form a bamboo joint solid structure, and the bamboo-like outer constraint support pipe concrete column of the embodiment is integrally formed.
In the bamboo-like outer constraint support tube concrete column scheme of the embodiment, the outer steel tube structure and the concrete filled in the outer steel tube structure are combined, so that the structural strength of the steel tube concrete is guaranteed, and meanwhile, the using amount of the concrete is reduced due to the hollow structure. In order to facilitate the installation and arrangement of the inner members of the steel pipe, the structure is constructed in a segmented welding and fixing mode. After the assembly of the internal components is completed, a plurality of steel pipe sections are connected one by one through the fixed connecting piece 3 and the anchoring piece 31, all the steel pipe sections are welded to be fixed to form a whole, the outer side of the steel pipe is polished, polished and painted, and finally the steel pipe is vertically placed to form a column body, and concrete is poured at one time. The concrete may be poured in sections to ensure fluidity of the concrete 5.
Further, in this embodiment, at least one integral filling block 4 is provided in each steel pipe section along the steel pipe axial direction, and the maximum diameter of the cross section of the integral filling block 4 can be adjusted according to actual conditions, so that the concrete 5 can smoothly reach the cavity during construction. When the length of the steel pipe is too long, a plurality of integral filling blocks 4 can be adopted to be axially connected in series along the steel pipe, and the integral filling blocks 4 are fixedly connected with the bamboo joint reinforcing steel bars 2 at two ends of the steel pipe section.
The integral filling block 4 is made of solid waste, and can be in the form of a cylinder, a sphere or an ellipsoid. Solid waste that may be used in practice includes, but is not limited to, plastics, cullet, ceramic chips, bricks and tiles, crushed stone, slag, concrete fragments, scrap iron and the like. For the above solid wastes, the integral filling block 4 may be formed by melt-bonding molding, integral compression molding, or wrapping and fixing molding. The fusion bonding molding is suitable for containing specific meltable solid wastes such as metal and the like, and the materials have a certain bonding force after melting, so that other solid wastes can be bonded into blocks; the integral compression molding refers to that solid waste is compressed into a block-shaped integral through mechanical equipment, is not easy to scatter, and is suitable for solid waste with certain plasticity; the wrapping and fixing forming means that the solid waste is wrapped by the grid material to form a whole, and the grid material can adopt grid cloth or a grid bag with proper mesh size, so that the wrapped solid waste cannot leak out, and the method is suitable for solid waste with larger particle size.
In the process of preparing the integral filling block 4, a smooth curved surface chamfer is arranged at the outward fold angle of the integral filling block 4 so as to prevent the concrete 5 from wrapping the integral filling block 4 to form a sharp angle and reduce the stress concentration phenomenon after the concrete 5 is molded. As the integral filling block 4 in the present embodiment adopts a cylinder, the longitudinal section of which is rectangular, a right-angle recess is formed at the top corner of the rectangle if the concrete 5 is directly poured, and therefore, the present embodiment provides an arc transition between the side surface of the cylinder and the end circular surface, as shown in fig. 2.
Specifically, the whole filling block 4 is fixedly connected with the bamboo joint reinforcing steel bar 2 through the fixed connecting piece 3, one end of the fixed connecting piece 3 is provided with an anchoring piece 31 embedded into the whole filling block 4, and the other end is fixedly connected with the center of the bamboo joint reinforcing steel bar 2.
The fixing connection piece 3 in this embodiment may be in the form of a metal chain, a steel cable or a steel bar, etc., and is connected with the bamboo joint steel bar 2 by a bolt or welded and fixed, and fixing base lugs are required to be arranged at two ends of the chain when the metal chain is used as the fixing connection piece 3. The anchoring piece 31 adopts an expansion screw or a barbed thorn rivet according to the compactness of the integral filling block 4, the denser integral filling block 4 adopts the expansion screw, and the larger gap adopts the barbed thorn rivet. In practical application, a plurality of integral filling blocks 4 are axially connected in series according to the length of the steel pipe section, adjacent integral filling blocks 4 are also connected in series and fixed through fixed connecting pieces 3, and anchoring pieces 31 embedded into the integral filling blocks 4 are respectively arranged at two ends of the fixed connecting pieces 3.
Specifically, the bamboo joint reinforcing steel bars 2 are welded into a central symmetrical reinforcing steel bar frame by adopting a plurality of equal-length reinforcing steel bars and are fixed on the inner wall of the steel pipe, all the reinforcing steel bars penetrate through the center of the steel pipe and are welded and fixed into a whole, and the end parts of the reinforcing steel bars are respectively welded and fixed with the inner wall of the steel pipe. The steel bars are welded and fixed at equal included angles to form a cross-shaped, X-shaped or rice-shaped steel bar framework with an isocenter symmetrical structure, and the center of the steel bar is welded and fixed with the fixed connecting piece 3.
In this embodiment, the thickness of the concrete near the bamboo joint reinforcing steel bars 2 is made as thin as possible on the premise of meeting the requirement of bearing capacity, so as to save the concrete consumption, and the axial height of the integral filling block 4 can be increased according to the requirement of bearing. The pore size of the reinforcing mesh formed by the combination of different types and layers of the bamboo joint reinforcing steel bars 2 is larger than 3 times of the particle size of coarse aggregate in the concrete 5 so as to meet the pouring requirement, and the concrete 5 can smoothly circulate the reinforcing mesh. For a large steel tube structure, the bamboo joint reinforcing steel bars 2 are selected to form a space grid structure in a combination mode of multiple branches, multiple layers and thick reinforcing steel bars according to the bearing capacity requirement, such as a rice-shaped, double-layer and phi 32 reinforcing steel bar net, so as to meet the bearing capacity requirement.
In practical application, the outer constraint supporting tube 1 can also be a carbon fiber tube made of carbon fiber cloth, and compared with a metal tube made of alloy materials, the carbon fiber tube has better strength, lighter weight and can be selected according to the actual bearing capacity requirement. The outer constraint support tube 1 is used for processing the inner wall of the outer constraint support tube to form a threaded rough surface so as to improve the bonding capability of the inner wall of the steel tube and the concrete 5 and further improve the mechanical property of the whole structure. The bonding degree between the external constraint support tube 1 and the concrete 5 also needs to coordinate the high-temperature deformation parameters of the external constraint support tube 1 and the concrete 5, and the expansion coefficient, the expansion stress and the like are considered so as to ensure the integral mechanical property of the structure.
In the bamboo-like outer constraint support tube concrete column, further, the concrete 5 is high-flow concrete, self-compaction concrete can be adopted on the premise of low economic requirement and high mechanical property requirement, the self-compaction concrete is vertically poured along the steel tube, and the cavity inside the steel tube is automatically filled without compaction by vibration.
In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc. refer to the directions or positional relationships based on those shown in the drawings, and are merely for clarity and convenience of description of the expression technical solution, and thus should not be construed as limiting the present invention.
In this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements is included, and may include other elements not expressly listed.
The foregoing is merely illustrative 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 think about variations or substitutions within the technical scope of the present invention, and the invention should be covered. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. Imitative outer constraint stay tube concrete column of bamboo, including outer constraint stay tube (1) and inside pouring's concrete (5), its characterized in that: the outer constraint support tube (1) is spliced and fixed in a segment form, bamboo joint reinforcing steel bars (2) are arranged in the tube between adjacent segments of the outer constraint support tube, integral filling blocks (4) are arranged in the segments of each outer constraint support tube (1), concrete (5) is poured in a cavity between the outer surfaces of the integral filling blocks (4) and the inner walls of the outer constraint support tube (1), concrete between the side surfaces of the integral filling blocks (4) and the inner walls of the outer constraint support tube (1) is of a bamboo tube hollow structure, and the concrete between the adjacent segments of the outer constraint support tube (1) and the bamboo joint reinforcing steel bars form a bamboo joint solid structure together.
2. The bamboo-like outer constraint support tube concrete column of claim 1, wherein: at least one integral filling block (4) is axially arranged in each section, and the integral filling blocks (4) are fixedly connected with bamboo joint reinforcing steel bars (2) at two ends of the outer constraint support tube section.
3. The bamboo-like outer constraint support tube concrete column according to claim 1 or 2, wherein: the integral filling block (4) adopts a cylindrical, spherical or ellipsoidal block structure made of solid waste.
4. The bamboo-like outer constraint support tube concrete column of claim 3, wherein: and the integral filling block (4) is provided with a smooth curved surface chamfer at the outer surface bevel.
5. The bamboo-like outer constraint support tube concrete column of claim 3, wherein: the integral filling block (4) adopts the modes of fusion bonding molding, integral compression molding or wrapping and fixing molding and the like.
6. The bamboo-like outer constraint support tube concrete column of claim 2, wherein: the integral filling block (4) is fixedly connected with the bamboo joint steel bar (2) through a fixed connecting piece (3), one end of the fixed connecting piece (3) is provided with an anchoring piece (31) embedded into the integral filling block (4), and the other end of the fixed connecting piece is fixedly connected with the center of the bamboo joint steel bar (2).
7. The bamboo-like outer constraint support tube concrete column of claim 3, wherein: the bamboo joint reinforcing steel bars (2) are welded into a central symmetrical reinforcing steel bar frame by adopting a plurality of equal-length reinforcing steel bars and are fixed on the inner wall of the outer constraint supporting tube (1).
8. The bamboo-like outer constraint support tube concrete column of claim 1, wherein: the concrete (5) is high-flow concrete, is vertically poured along the external constraint support tube, and automatically fills the cavity in the external constraint support tube.
9. The bamboo-like outer constraint support tube concrete column of claim 1, wherein: the outer constraint supporting tube (1) is a steel tube, a carbon fiber tube or a high-performance alloy tube.
10. The bamboo-like outer constraint support tube concrete column of claim 9, wherein: the inner wall of the outer constraint supporting tube (1) is subjected to rough surface treatment by threads.
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|---|---|---|---|
| CN202311237528.6A CN117127755B (en) | 2023-09-25 | 2023-09-25 | Bamboo-like outer constraint support tube concrete column |
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| CN202311237528.6A CN117127755B (en) | 2023-09-25 | 2023-09-25 | Bamboo-like outer constraint support tube concrete column |
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| CN117127755A true CN117127755A (en) | 2023-11-28 |
| CN117127755B CN117127755B (en) | 2024-07-12 |
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