CN220724825U - Assembled string bridge structure - Google Patents
Assembled string bridge structure Download PDFInfo
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- CN220724825U CN220724825U CN202322143180.6U CN202322143180U CN220724825U CN 220724825 U CN220724825 U CN 220724825U CN 202322143180 U CN202322143180 U CN 202322143180U CN 220724825 U CN220724825 U CN 220724825U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 238000010276 construction Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of buildings, and particularly discloses an assembled string bridge structure, which comprises: the two side pier bent caps are oppositely arranged; the two ends of each main inhaul cable are respectively connected with the two side pier capping beams to form an arc-shaped structure with an upward opening, a first telescopic limiting rod is connected between two adjacent main inhaul cables, and each main inhaul cable forms a curve with an outward concave surface on a plane; the prefabricated bridge deck structure is horizontally arranged between the two side pier capping beams, and a steel capping beam is arranged at the bottom of the prefabricated bridge deck structure; and the telescopic inclined stay bars are arranged between the main inhaul cable and the prefabricated bridge deck structure in a zigzag manner, one end of each telescopic inclined stay bar is connected with the end part of the first telescopic limit rod, and the other end of each telescopic inclined stay bar is connected with the steel cap beam. The utility model can effectively solve the problem of small vertical rigidity of the bridge and effectively improve the stability of the assembled string bridge structure.
Description
Technical Field
The utility model relates to the technical field of buildings, in particular to an assembled string bridge structure.
Background
The beam string structure is a hybrid structure system formed by winding a rigid member, a flexible stay rope and a stay bar connected in the middle, the structure composition of the beam string structure is a novel self-balancing system, the beam string structure is a large-span prestress space structure system, the beam string structure system is simple, the stress is clear, the structure form is various, the advantages of rigid and flexible materials are fully exerted, and the beam string structure is simple and convenient to manufacture, transport and construct and has good application prospect.
The beam string structure is generally used for roof structures, as shown in fig. 1, the roof structure 3 'is arranged between two supporting points 1', the flexible inhaul cable 2 'is connected between the two supporting points 1' and arranged below the roof structure 3 ', the roof structure 3' and the flexible inhaul cable 2 'are connected by the vertical supporting rod 4' to form a beam string roof structure system, the roof load of the structure system is smaller, and the requirement on the overall rigidity of the structure is relatively smaller, so the beam string roof structure has wide application on the roof. In addition, a string Liang Qiaoliang is similar to a string girder roofing structure, as shown in fig. 2-3, a girder 5 ' is adopted to replace a roofing structure 3 ', and the girder 5 ' is connected with a flexible guy rope 2 ' through a vertical stay bar 4 ', so that the requirements on structural rigidity and stability are higher due to relatively larger dead weight and live load of the bridge; therefore, the beam string structure is often only used for pedestrian overpasses with small spans, and when the beam string structure is applied to bridges with large spans, the beam string structure is small in structural rigidity and poor in transverse stability, the bridge deck in the middle and later period of operation is easy to deform obviously in the vertical direction to influence the traffic of vehicles, and the beam string structure has high requirements on the bearing capacity of temporary ground anchors during construction, and has high requirements on construction conditions and high cost, so that the beam string structure is less used in the field of bridges.
Disclosure of Invention
The utility model aims to solve the technical problems that: how to solve the technical problems of small structural rigidity and poor stability of the traditional beam string.
In order to solve the technical problems, the utility model provides an assembled string bridge structure, which comprises:
the two side pier bent caps are oppositely arranged;
the two ends of each main inhaul cable are respectively connected with two side pier bent caps to form an arc-shaped structure with an upward opening on a vertical surface, a first telescopic limiting rod is connected between two adjacent main inhaul cables, each main inhaul cable forms a curve with a concave surface facing outwards on a plane, so that the distance between the middle parts of the two adjacent main inhaul cables is smaller than that between the two ends, and the length of the first telescopic limiting rod at the middle part is smaller than that of the first telescopic limiting rods at the two ends;
the prefabricated bridge deck structure is horizontally arranged between the two side pier bent caps, and a steel bent cap is arranged at the bottom of the prefabricated bridge deck structure; and
the telescopic inclined stay bars are arranged between the main inhaul cable and the prefabricated bridge deck structure in a zigzag manner, one end of each telescopic inclined stay bar is connected with the end part of the first telescopic limit bar, and the other end of each telescopic inclined stay bar is connected with the steel bent cap;
the telescopic inclined stay rod is arranged on the prefabricated bridge deck structure, a first region is defined between the telescopic inclined stay rod and the prefabricated bridge deck structure, a first limiting stay rope is arranged in the first region in a crossing mode, one end of the first limiting stay rope is connected with the main stay rope, and the other end of the first limiting stay rope is connected with one end, far away from the main stay rope, of the telescopic inclined stay rod.
Further preferably, the prefabricated bridge deck structure is formed by paving a plurality of prefabricated panels, wet joints are reserved between two adjacent prefabricated panels, and the wet joints are arranged corresponding to the steel bent cap.
Further preferably, a triangular area is defined between the two telescopic diagonal braces and the main guy wires connected to the same steel bent cap; or alternatively
And a triangular area is formed by the two telescopic diagonal braces and the steel bent cap, wherein the telescopic diagonal braces and the steel bent cap are connected with the same first telescopic limiting rod.
Further preferably, the method further comprises:
the two ground anchors are respectively arranged at two sides of the two side pier capping beams;
the tower column is arranged between the ground anchor and the side pier capping beam, and the height of the tower column is larger than that of the ground anchor and the side pier capping beam; and
the auxiliary inhaul cable is connected between the ground anchor and the main inhaul cable, and the auxiliary inhaul cable penetrates through the highest point of the tower column.
Still preferably, the bridge deck structure further comprises a limiting auxiliary assembly, wherein the limiting auxiliary assembly is arranged below the prefabricated bridge deck structure, and the limiting auxiliary assembly is arranged between two adjacent steel bent caps.
Further preferably, the limiting auxiliary assembly comprises a second telescopic limiting rod, the second telescopic limiting rod is symmetrically arranged between two adjacent steel bent caps, and a second area is formed by surrounding the steel bent caps and the second telescopic limiting rod together.
Further preferably, the limiting auxiliary assembly further comprises a second limiting inhaul cable, and the second limiting inhaul cable is arranged in the second area in a crossing mode.
Further preferably, a butt strap is further laid between two adjacent main cables.
Compared with the prior art, the assembled string bridge structure provided by the utility model has the beneficial effects that:
according to the utility model, the telescopic diagonal brace is adopted to replace the existing vertical brace, so that the problem of small vertical rigidity of a bridge can be effectively solved, and the bridge deck flatness is recovered by adjusting the length of the telescopic diagonal brace by utilizing the adjustability of the telescopic diagonal brace when the bridge deck is obviously deformed vertically in the middle and later stages of operation; the telescopic diagonal bracing rods are arranged between the main inhaul cables and the prefabricated bridge deck structure in a zigzag manner, a first telescopic limiting rod is connected between two adjacent main inhaul cables, each main inhaul cable forms a curve with the concave surface outwards on a plane, so that the distance between the middle parts of the two adjacent main inhaul cables is smaller than the distance between the two ends, and the length of the first telescopic limiting rod at the middle part is smaller than the length of the first telescopic limiting rods at the two ends; a first area is enclosed jointly between relative scalable diagonal brace, first scalable gag lever post and the prefabricated bridge deck structure, is equipped with the first spacing cable of alternately setting in the first area, and the one end and the main cable of first spacing cable are connected, and the other end is kept away from the one end of main cable with scalable diagonal brace and is connected to can effectively promote the whole lateral stability of this assembled string bridge girder structure.
Drawings
Fig. 1 is an elevation view of a prior art beam roof construction.
Fig. 2 is an elevation view of a prior art beam bridge.
Fig. 3 is a bottom plan view of a prior art beam bridge.
Fig. 4 is an elevation view of an assembled bridge construction of a beam string according to the present utility model.
Fig. 5 is a plan view of a prefabricated deck structure according to the present utility model.
Fig. 6 is a plan view of the spacing aid assembly of the present utility model.
Fig. 7 is a plan view of the main cable of the present utility model.
Fig. 8 is a cross-sectional view of an assembled bridge construction of a beam string according to the present utility model.
Fig. 9 is a schematic structural view of another embodiment of an assembled bridge girder construction of a string bridge according to the present utility model.
In the figure:
1. side pier capping beams;
2. a main guy cable;
3. a first retractable stop lever;
4. a telescopic diagonal brace;
5. a steel capping beam;
6. prefabricating a bridge deck structure;
7. a wet seam;
8. a limit auxiliary component; 81. the second telescopic limit rod; 82. the second limiting inhaul cable;
9. a butt strap;
10. the first limiting inhaul cable;
11. an earth anchor;
12. a tower column;
13. an auxiliary stay rope.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "inner," "outer," "intermediate," "near," "far," "one end," "the other end," "transverse," "vertical," "horizontal," etc. used herein are merely for convenience in describing the present utility model and simplifying the description, and do not denote or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 4, the present embodiment provides an assembled beam bridge structure with strings, which includes two side pier capping beams 1, a main cable 2, a prefabricated bridge deck structure 6 and a telescopic diagonal brace 4, wherein the side pier capping beams 1 are oppositely arranged.
In a specific example, the number of main inhaul cables 2 is at least two, and two ends of each main inhaul cable 2 are respectively connected with two pier cap beams 1 to form an arc-shaped structure with an upward opening, and a first telescopic limiting rod 3 is connected between two adjacent main inhaul cables 2.
It should be noted that, the above-mentioned "at least two" means that the number is equal to or greater than two, that is, two, three, four … …, etc., and in this example, the main cable 2 is preferably two.
In a specific example, the prefabricated bridge deck structure 6 is horizontally arranged between the two side pier capping beams 1, and in order to facilitate the connection of the telescopic diagonal bracing rods 4, a steel capping beam 5 needs to be arranged at the bottom of the prefabricated bridge deck structure 6; the scalable diagonal brace 4 sets up between main cable 2 and prefabricated bridge floor structure 6, and the one end and the end connection of first scalable gag lever post 3 of scalable diagonal brace 4, and the other end is connected with steel bent cap 5, adopts scalable diagonal brace 4 to replace current vertical vaulting pole, can utilize the adjustability of scalable diagonal brace 4 when the apparent vertical irregular deformation takes place for the bridge floor in the middle and later stage of operation, resumes bridge floor roughness through the length of adjusting scalable diagonal brace 4.
In a specific embodiment, in order to improve the lateral stability of the bridge, the main cables 2 are set to be curved with the concave surface facing outwards on a plane, as shown in fig. 7, that is, the distance between the middle parts of two adjacent main cables 2 is smaller than the distance between two ends, and the distance between the two adjacent main cables 2 is gradually increased from the middle to the two ends; correspondingly, the length of the first telescopic limit rod 3 at the middle part is smaller than that of the first telescopic limit rods 3 at the two ends; it should be noted that the distance between two adjacent main inhaul cables 2 can be adjusted through the first telescopic limiting rod 3, the construction difficulty is low, and the operation is simple.
Referring to fig. 5, in some examples, to facilitate the laying construction of the prefabricated deck structure 6, the prefabricated deck structure 6 should be laid out of a plurality of prefabricated panels, specifically, each prefabricated panel of the middle portion is laid between two adjacent steel cap beams 5, and the prefabricated panel of the end portion is laid between the steel cap beam 5 and the side pier cap beam 1; in order to ensure the firmness of the prefabricated bridge deck structure 6 after being paved, the wet joint 7 between two adjacent prefabricated panels is firmly connected with the steel bent cap 5.
Preferably, the wet joint 7 is arranged corresponding to the steel capping beam 5, so that the subsequent splicing process is facilitated, and the integrity of the bridge deck structure can be enhanced by reserving the wet joint 7.
In addition, a wet seam 7 should also be reserved between the prefabricated panel and the side pier capping beam 1.
In some examples, as shown in fig. 4, two telescopic diagonal braces 4 connected to the same steel bent cap 5 and the main cable 2 together enclose a triangular area, or two telescopic diagonal braces 4 connected to the same first telescopic limit rod 3 and the steel bent cap 5 together enclose a triangular area, so that a plurality of telescopic diagonal braces 4 can form a saw-tooth structure, the stability of the assembled string bridge structure is improved, and the problem of small vertical rigidity of the bridge can be solved.
In the above embodiment, in order to further improve the transverse rigidity and the transverse stability, a first limit cable 10 is further provided between the two opposite telescopic diagonal braces 4; specifically, please combine fig. 8, enclose into first region jointly between relative scalable diagonal brace 4, first scalable gag lever post 3 and prefabricated bridge deck structure 6, cross the setting of first spacing cable 10 in first region, wherein the one end of first spacing cable 10 is connected with main cable 2 for two relative scalable diagonal brace 4 can form more stable triangle-shaped structure, can further improve the transverse rigidity and the lateral stability of this assembled string bridge structure, the other end is connected with the one end that main cable 2 was kept away from to scalable diagonal brace 4.
Here, in the above example, since both ends of each main cable 2 are connected with the two pier cap beams 1 to form an arc structure with an opening facing upward, the shape of the triangle area can be adjusted by adjusting the length of the telescopic diagonal brace 4, thus being more convenient in construction and assembly.
It should be noted that the first region may have a rectangular structure or an inverted trapezoid structure.
In some embodiments, in the construction process of the bridge, before the prefabricated bridge deck structure 6 is not constructed, the beam string structure cannot form a self-balancing system, the tension of the beam string structure needs to be balanced by the main guy cable 2 through the temporary ground anchor, the heavier the prefabricated bridge deck structure 6 is, the larger the tonnage of the temporary ground anchor is, and the temporary ground anchor is a permanent structure and cannot be recycled, so in order to reduce the tonnage of the temporary ground anchor, improve the construction efficiency and reduce the engineering investment, a limit auxiliary assembly 8 can be arranged to play a role in auxiliary assembly, as shown in fig. 4, 6 and 8, the limit auxiliary assembly 8 is arranged below the prefabricated bridge deck structure 6, and the limit auxiliary assembly 8 is arranged between two adjacent steel cap beams 5.
In other embodiments, the spacing aid 8 may also be removed after the bridge is set up for recycling in other projects when the span or load applied to the bridge is small.
In the above example, specifically, the spacing auxiliary assembly 8 includes a second telescopic limit rod 81 and a second spacing cable 82, the second telescopic limit rod 81 is symmetrically disposed between two adjacent steel capping beams 5, a second area is jointly enclosed between the steel capping beams 5 and the second telescopic limit rod 81, the second spacing cable 82 is crossly disposed in the second area, so as to form a more stable triangular frame structure, after the string bridge structure forms a self-balancing system, the steel capping beams 5 should be disposed on the same plane at this time, and then prefabricated panels are symmetrically laid from two ends to the middle.
It should be noted that the second region may have a rectangular structure or an inverted trapezoid structure.
In some examples, a butt strap 9 is further laid between two adjacent main cables 2, where the butt strap 9 can play the same role as the first telescopic limit rod 3, i.e. can perform lateral limit, and meanwhile, the butt strap 9 can also be used as a construction and maintenance working platform, so that the bridge is convenient to assemble.
In other examples, the span L between two side pier capping beams 1 is less than or equal to 100m, and the width D of the prefabricated deck structure 6 is less than or equal to 16m.
In other examples, the elevation of the lowest point of the prefabricated deck structure 6 and the main guy cable 2 is H, wherein H is more than or equal to 12.5m and less than or equal to 20m.
In other embodiments, as shown in fig. 9, the assembled string bridge structure further includes two ground anchors 11, a tower column 12 and an auxiliary cable 13, where the number of the ground anchors 11 is two and is respectively disposed at two sides of the two pier cap beams; the tower column 12 is arranged between the ground anchor 11 and the side pier bent cap 1, and the height of the tower column 12 is larger than the height of the ground anchor 11 and the side pier bent cap 1; the auxiliary stay cable 13 is connected between the ground anchor 11 and the main stay cable 2, and the auxiliary stay cable 13 passes through the highest point of the tower column 12 to accelerate the assembly efficiency of the assembled string bridge structure.
In the above embodiment, by providing the second telescopic limit rod 81 and the second limit cable 82 which are light in weight, the tonnage of the ground anchor 11 can be reduced, the construction efficiency can be improved, and the engineering investment can be reduced; before the bridge deck structure is not constructed, the beam string structure cannot form a self-balancing system, the tension of the beam string is required to be balanced by the aid of the ground anchors 11 through the inhaul cables, the heavier the bridge deck structure is, the larger the tonnage of the ground anchors 11 is, in order to reduce the tonnage of the ground anchors 11, the self-balancing system is formed by adopting the second telescopic limiting rods 81 and the second limiting inhaul cables 82 which are light in weight, after the beam string bridge structure forms the self-balancing system, prefabricated panels are symmetrically paved from two ends to the middle at the moment, the construction efficiency is improved, and the construction cost is reduced.
In summary, the assembled string bridge structure provided by the embodiment of the utility model adopts the telescopic diagonal brace 4 to replace the existing vertical brace, so that the problem of small vertical rigidity of the bridge can be effectively solved, and meanwhile, when the bridge deck in the middle and later period of operation is obviously deformed vertically, the adjustability of the telescopic diagonal brace 4 is utilized, and the bridge deck flatness is recovered by adjusting the length of the telescopic diagonal brace 4; the telescopic diagonal brace 4 is arranged between the main inhaul cables 2 and the prefabricated bridge deck structure 6 in a zigzag manner, a first telescopic limit rod 3 is connected between two adjacent main inhaul cables 2, each main inhaul cable 2 forms a curve with the concave surface outwards on a plane, so that the distance between the middle parts of the two adjacent main inhaul cables 2 is smaller than the distance between two ends, and the length of the first telescopic limit rod 3 at the middle part is smaller than the length of the first telescopic limit rod 3 at the two ends; the opposite telescopic diagonal brace 4, the first telescopic limit rod 3 and the prefabricated bridge deck structure 6 jointly enclose a first area, a first limit cable 10 which is arranged in a crossing way is arranged in the first area, one end of the first limit cable 10 is connected with the main cable 2, and the other end of the first limit cable is connected with one end of the telescopic diagonal brace far away from the main cable, so that the overall transverse stability of the assembled string bridge structure can be effectively improved; in addition, the utility model can realize self-balancing of the beam bridge structure by arranging the limit auxiliary component 8, and solves the problems of small structural rigidity, poor transverse stability, easy occurrence of obvious deformation of the bridge deck in the middle and later period of operation in the vertical direction to influence the passing of vehicles, high requirement on the temporary ground anchor bearing capacity during construction, high requirement on construction conditions and high cost when the beam bridge structure in the prior art is applied to a bridge with large span.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model. While there has been shown and described what are at present considered to be fundamental principles, main features and advantages of the present utility model, it will be apparent to those skilled in the art that the present utility model is not limited to the details of the foregoing preferred embodiments, and that the examples should be considered as exemplary and not limiting, the scope of the present utility model being defined by the appended claims rather than by the foregoing description, and it is therefore intended to include within the utility model all changes which fall within the meaning and range of equivalency of the claims.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail herein, but rather is provided for the purpose of enabling those skilled in the art to make and use the embodiments described herein.
Claims (8)
1. An assembled beam-string bridge structure, comprising:
the two side pier bent caps are oppositely arranged;
the two ends of each main inhaul cable are respectively connected with two side pier bent caps to form an arc-shaped structure with an upward opening on a vertical surface, a first telescopic limiting rod is connected between two adjacent main inhaul cables, each main inhaul cable forms a curve with a concave surface facing outwards on a plane, so that the distance between the middle parts of the two adjacent main inhaul cables is smaller than that between the two ends, and the length of the first telescopic limiting rod at the middle part is smaller than that of the first telescopic limiting rods at the two ends;
the prefabricated bridge deck structure is horizontally arranged between the two side pier bent caps, and a steel bent cap is arranged at the bottom of the prefabricated bridge deck structure; and
the telescopic inclined stay bars are arranged between the main inhaul cable and the prefabricated bridge deck structure in a zigzag manner, one end of each telescopic inclined stay bar is connected with the end part of the first telescopic limit bar, and the other end of each telescopic inclined stay bar is connected with the steel bent cap;
the telescopic inclined stay rod is arranged on the prefabricated bridge deck structure, a first region is defined between the telescopic inclined stay rod and the prefabricated bridge deck structure, a first limiting stay rope is arranged in the first region in a crossing mode, one end of the first limiting stay rope is connected with the main stay rope, and the other end of the first limiting stay rope is connected with one end, far away from the main stay rope, of the telescopic inclined stay rod.
2. The assembled string bridge structure according to claim 1, wherein the prefabricated deck structure is formed by paving a plurality of prefabricated panels, a wet joint is reserved between two adjacent prefabricated panels, and the wet joint is arranged corresponding to the steel cap beam.
3. The assembled beam-string bridge structure according to claim 1, wherein two telescopic diagonal braces connected to the same steel cap beam and the main cable together define a triangular area; or alternatively
And a triangular area is formed by the two telescopic diagonal braces and the steel bent cap, wherein the telescopic diagonal braces and the steel bent cap are connected with the same first telescopic limiting rod.
4. The assembled beam-string bridge structure as defined in claim 1, further comprising:
the two ground anchors are respectively arranged at two sides of the two side pier capping beams;
the tower column is arranged between the ground anchor and the side pier capping beam, and the height of the tower column is larger than that of the ground anchor and the side pier capping beam; and
the auxiliary inhaul cable is connected between the ground anchor and the main inhaul cable, and the auxiliary inhaul cable penetrates through the highest point of the tower column.
5. The assembled beam-string bridge structure according to claim 1, further comprising a limiting auxiliary assembly, wherein the limiting auxiliary assembly is arranged below the prefabricated deck structure, and the limiting auxiliary assembly is arranged between two adjacent steel cap beams.
6. The assembled bridge girder construction of string beams according to claim 5, wherein the limit auxiliary assembly comprises a second telescopic limit rod, the second telescopic limit rod is symmetrically arranged between two adjacent steel cap girders, and a second area is jointly enclosed between the steel cap girders and the second telescopic limit rod.
7. The assembled beam-string bridge structure according to claim 6, wherein the spacing aid assembly further comprises a second spacing cable, the second spacing cable being disposed crosswise in the second region.
8. The assembled string bridge structure according to claim 1, wherein a bridge plate is further laid between two adjacent main cables.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322143180.6U CN220724825U (en) | 2023-08-09 | 2023-08-09 | Assembled string bridge structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322143180.6U CN220724825U (en) | 2023-08-09 | 2023-08-09 | Assembled string bridge structure |
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| Publication Number | Publication Date |
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| CN220724825U true CN220724825U (en) | 2024-04-05 |
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| CN202322143180.6U Active CN220724825U (en) | 2023-08-09 | 2023-08-09 | Assembled string bridge structure |
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- 2023-08-09 CN CN202322143180.6U patent/CN220724825U/en active Active
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