CN114635372A - Multi-tower suspension bridge reinforcing structure for overcoming middle tower effect - Google Patents
Multi-tower suspension bridge reinforcing structure for overcoming middle tower effect Download PDFInfo
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- CN114635372A CN114635372A CN202210275977.9A CN202210275977A CN114635372A CN 114635372 A CN114635372 A CN 114635372A CN 202210275977 A CN202210275977 A CN 202210275977A CN 114635372 A CN114635372 A CN 114635372A
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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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
- E01D19/00—Structural or constructional details of bridges
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides a multi-tower suspension bridge reinforcing structure for overcoming a middle tower effect, and relates to the technical field of suspension bridge construction. The central buckle component is arranged in the main cable span to form the triangular truss, so that the strength of the whole central buckle component is effectively increased, the rigidity of the multi-tower suspension bridge can be effectively improved, the safety of the bridge is still guaranteed, two central buckles can be mutually compensated, the abrasion of the central buckle component is effectively reduced, and the service life is long.
Description
Technical Field
The invention relates to the technical field of suspension bridge construction,
more particularly, the present invention relates to a multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect.
Background
In recent years, with rapid development of science and technology and continuous improvement of travel quality requirements of people, the wind of constructing cross-strait bridges and cross-river bridges at home and abroad rises, and the suspension bridges are dominant in various schemes by virtue of strong crossing capability. The multi-tower suspension bridge not only solves the span problem, but also can keep the original optimal rise-to-span ratio, but the suspension bridge originally belongs to a flexible structure, and in addition, the tower lacks the effective constraint of a main cable, so that the development of the multi-tower suspension bridge is hindered by a middle tower effect. The 'middle tower effect' is a key problem which puzzles the development of a multi-tower suspension bridge, the middle tower lacks the constraint of a main cable of an edge span, the main cable has weaker constraint on a middle bridge tower, and the tower top of the multi-tower suspension bridge generates huge unbalanced force under the action of the worst load working condition. If the rigidity of the middle tower is too high, the saddle can not bear the difference of cable force to generate relative sliding; the rigidity of the middle tower is too small, and the main beam generates large deflection when bearing load, so that the driving comfort is influenced.
The root cause of the 'middle tower effect' is deeply researched, effective constraint is lacked between a main cable and a main beam, relative dislocation is generated when unbalanced load is applied, effective cable beam connection needs to be established, so that the development of overcoming the middle tower effect is increasing in the technology, for example, chinese patent invention CN112239992A proposes a three-tower self-anchored suspension bridge, which comprises two side piers, two auxiliary piers arranged at the inner sides of the two side piers, three main towers arranged between the two auxiliary piers, a main beam, a plurality of main cables fixed on the main tower and a plurality of slings used for lifting the main beam, the main cable is a space cable surface, and the main cable and the main beam are connected through a central buckle at the midspan position to restrain the relative displacement of the main cable and the main cable. The invention forms a three-tower self-anchored suspension bridge structure system through the central buckle, increases the horizontal constraint of the midspan main cable on the top of the middle tower, thereby reducing the longitudinal bridge direction bending moment of the bottom of the middle tower under unbalanced live load, reducing the structure size of the middle tower, improving the vertical rigidity of the structure, improving the economic span of the three-tower self-anchored suspension bridge, being suitable for the three-tower self-anchored suspension bridge with the span of more than 400m and being suitable for the large-span highway rail co-construction bridge.
However, the above suspension bridge structure still has the following problems: the main cable and the main beam are connected only through the common central buckle, the vertical rigidity of the structure is not enough, and when the main span is fully loaded, the central buckle only can properly reduce the influence of vertical deflection and cannot offset the increment of horizontal deflection, so that the structure of the central buckle is seriously damaged, the service life is short, and the safety of a cable bridge is influenced.
Therefore, in order to solve the above problems, it is necessary to design a reasonably efficient reinforcement structure for a multi-tower suspension bridge for overcoming the mid-tower effect.
Disclosure of Invention
The invention aims to provide a multi-tower suspension bridge reinforcing structure which is simple in structure and low in installation cost, wherein a central buckle assembly is installed in a main cable span, two central buckles in the central buckle assembly and one section of a main beam form a triangular truss, the strength of the whole central buckle assembly is effectively increased, the rigidity of a multi-tower suspension bridge can be effectively improved, the resistance to horizontal deflection increment is high, the safety of the bridge is still guaranteed even if the main span is fully loaded, even a compensating cable can be additionally installed on the triangular truss, the two central buckles in the central buckle assembly are further mutually compensated, the abrasion of the central buckle assembly is effectively reduced, the service life is long, and the maintenance cost is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multi-tower suspension bridge reinforcing structure for overcoming a middle tower effect comprises a middle tower, a side tower, a main cable for connecting the top of the middle tower and the top of the side tower, a main beam for connecting the bottom of the middle tower and the bottom of the side tower, and a central buckle component for connecting the main cable and the main beam, the central buckle component comprises a first central buckle and a second central buckle, the first central buckle and the second central buckle are both I-shaped pieces, the upper ends of the first central buckle and the second central buckle are connected with the midspan position of the main cable, a plurality of hanging rods are connected between the main cable and the main beam, the joint of the suspender at the middle position of the main cable near the middle tower and the main beam is connected with the lower end of the first central buckle, the connecting part of the suspender at the middle position of the main cable, which is close to one side of the side tower, and the main beam is connected with the lower end of the second central buckle.
Preferably, the first and second center buckles have the same length.
Preferably, the first central buckle middle part is connected with the second central buckle middle part through a connecting rod.
Preferably, the lower end of the first center button is connected to the bottom of the second center button by a compensating cable.
Preferably, the height of the compensation cable is not lower than that of the main beam, the midspan position of the compensation cable is connected with the end part of the connecting rod through a third central buckle, and the midspan position of the compensation cable is connected with one end, far away from the third central buckle, of the connecting rod through a fourth central buckle.
Preferably, the third central button and the fourth central button are i-shaped members.
Preferably, the first central button, the second central button, the third central button and the fourth central button are all rigid pieces.
Preferably, a bolt ball for connecting with the central buckle assembly is arranged at the midspan position of the main cable, and welding grooves for welding with the bolt ball are arranged at the end parts of the first central buckle and the second central buckle.
Preferably, the joint of the suspender and the main beam is provided with an anchoring ring, and one end of the first central buckle far away from the welding groove and one end of the second central buckle far away from the welding groove are both provided with welding handles for welding with the anchoring ring.
Preferably, the lower side of the main beam is provided with a foundation column for connecting the middle tower and the side tower.
The multi-tower suspension bridge reinforcing structure for overcoming the middle tower effect has the beneficial effects that: simple structure, the installation cost is low, at the main push-towing rope midspan installation central authorities detain the subassembly, one section formation triangle-shaped truss of two central authorities in the subassembly are detained with the girder to central authorities, effectively increase the intensity of whole central authorities and detain the subassembly, can effectively improve multi-tower suspension bridge rigidity, and it is high to the resistance of horizontal deflection increment, even if the main push-towing rope is full-load, the cable bridge security still is guaranteed, can install the compensation cable additional on the triangle-shaped truss even, further make two central authorities in the subassembly of detaining in the central authorities and detain the formation and compensate each other, effectively reduce the wearing and tearing of subassembly are detained in the central authorities, long service life, maintenance cost reduces.
Drawings
FIG. 1 is a schematic overall structural view of one embodiment of a multi-pylon suspension bridge reinforcing structure for overcoming the mid-tower effect of the present invention;
FIG. 2 is a schematic diagram of a first center buckle in an embodiment of a multi-pylon suspension bridge reinforcement structure for overcoming the mid-tower effect of the present invention;
FIG. 3 is a schematic diagram of the connection of a main cable mid-span location to a center buckle assembly in an embodiment of a multi-pylon suspension bridge reinforcing structure of the present invention for overcoming the mid-pylon effect;
FIG. 4 is a schematic view of the structure of the joint of the hanger bar and the main beam of an embodiment of the reinforcement structure of the multi-tower suspension bridge for overcoming the mid-tower effect of the present invention;
FIG. 5 is a schematic view of a main span force analysis of a suspension bridge without using a multi-tower suspension bridge reinforcement structure for overcoming the king-tower effect of the present invention;
FIG. 6 is a schematic view of a main span stress analysis of a suspension bridge using a multi-tower suspension bridge reinforcement structure of the present invention for overcoming the mid-tower effect;
in the figure: 1. the central buckle assembly comprises a central buckle assembly 11, a first central buckle 111, a welding groove 112, a welding handle 12, a second central buckle 13, a connecting rod 14, a compensation cable 15, a third central buckle 16, a fourth central buckle 2, a main beam 21, a foundation column 22, an anchoring ring 3, a main cable 31, a bolt ball 4, a middle tower 5, a side tower 6 and a hanging rod.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the modules and steps and the steps set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise.
Meanwhile, it should be understood that the flows in the drawings are not merely performed individually for convenience of description, but a plurality of steps are performed alternately with each other.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate 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 invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and systems known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
The first embodiment is as follows: as shown in fig. 1 to 6, which are only one embodiment of the present invention, a multi-tower suspension bridge reinforcing structure for overcoming the middle tower effect comprises a middle tower 4, a side tower 5, a main cable 3 for connecting the top of the middle tower 4 and the top of the side tower 5, a main beam 2 for connecting the bottom of the middle tower 4 and the bottom of the side tower 5, and a center buckle assembly 1 for connecting the main cable 3 and the main beam 2, wherein the center buckle assembly 1 comprises a first center buckle 11 and a second center buckle 12, the first center buckle 11 and the second center buckle 12 are both i-shaped members, the upper ends of the first center buckle 11 and the second center buckle 12 are both connected with the midspan position of the main cable 3, a plurality of suspenders 6 are connected between the main cable 3 and the main beam 2, the connection position of the main cable 3 on the midspan position near to the suspenders 6 on one side of the middle tower 4 and the main beam 2 is connected with the lower end of the first center buckle 11, the joint of the suspender 6 at the midspan position of the main cable 3 close to one side of the side tower 5 and the main beam 2 is connected with the lower end of the second central buckle 12.
In the present invention, we only describe the structural reinforcement between the middle tower 4 and one side of the side tower 5 in the three-tower suspension bridge structure, the main cable 3 connects the top of the middle tower 4 and the top of the side tower 5, and the main cable 3 hangs down at the mid-span position under the gravity; the main beam 2 is a main beam horizontally arranged on the whole suspension bridge, in order to prevent the main cable 3 from shaking, some hanging rods 6 (or slings) can also hang up and down on the main cable 3 to be flexibly connected with the main beam 2, and a central buckle assembly 1 is arranged at the midspan position of the main cable 3 and connected with the main beam 2.
Here, the center buckle assembly 1 includes a first center buckle 11 and a second center buckle 12, the upper ends of the first center buckle 11 and the second center buckle 12 are connected to the main cable 3 at a mid-span position, a plurality of suspension rods 6 are connected between the main cable 3 and the main beam 2, the connection between the suspension rod 6 and the main beam 2 at the mid-span position of the main cable 3 near the side of the middle tower 4 is connected to the lower end of the first center buckle 11, the connection between the suspension rod 6 and the main beam 2 at the mid-span position of the main cable 3 near the side of the side tower 5 is connected to the lower end of the second center buckle 12, so that the first center buckle 11, the second center buckle 12 and the section of the main beam 2 between the bottom end of the first center buckle 11 and the bottom end of the second center buckle 12 form a triangular truss structure, so that the whole center buckle assembly 1 has a higher structural degree and is stable in the triangular structure, the longitudinal and transverse displacements of the span-middle position of the main cable 3 are limited, the strength of the whole central buckle assembly is effectively improved, the service life is long, and the rigidity of the multi-tower suspension bridge can be effectively improved.
For convenience of explaining the function of the multi-tower suspension bridge reinforcing structure for overcoming the middle tower effect, the stress analysis of the suspension bridge is carried out (taking a left span as an example in the following):
when the multi-tower suspension bridge reinforcing structure for overcoming the middle tower effect is not used, as shown in fig. 5, the multi-tower suspension bridge lacks the constraint of the side-span main cable due to the middle tower 4, the constraint of the main cable 3 to the middle bridge tower is weaker, and the rigidity of the middle tower 4 is lower; when the load is the most unfavorable load, namely the main span is fully loaded by q, the top of the side tower 5 and the top of the middle tower 4 are displaced towards the span middle, the position A of the top of the side tower 5 is displaced to A ', the position B of the top of the middle tower 4 is displaced to B', and the horizontal force H2 applied to the top of the side tower 5 is equal to the horizontal force H1 applied to the top of the middle tower 4; the main beam 2 generates vertical deflection, the span-middle position C of the main span 3 moves downwards to C ', and the middle tower 4 generates more displacement at the top of the tower due to low rigidity, namely AA ' is smaller than BB ', so that the peak value of the vertical deflection of the main beam is larger, namely delta 1 is larger than span-middle deflection delta 2, and the peak value of the deflection is no longer span;
on the contrary, when the multi-tower suspension bridge reinforcing structure for overcoming the middle tower effect of the invention is used, as shown in fig. 6, after the main cable 3 span is connected with the main beam 2 through the central buckle component 1, corresponding to the main beam 2 has restraint on the main cable 3 span, when the main span is fully loaded q, which is the most unfavorable load, the middle tower 4 still has more displacement than the side tower 5, but because the central buckle component 1 limits the longitudinal displacement of the main cable 3, the deflection increment caused by the multiple displacement of the middle tower 4 than the side tower 5 is more than that when the reinforcing structure is not used, and the deflection peak value δ 4 at this time is smaller than the deflection peak value δ 1 when the reinforcing structure is not used; and the central buckle assembly 1 also limits the transverse displacement of the mid-span position of the main cable 3, so that the horizontal force H2 borne by the top of the side tower 5 is equal to the sum of the horizontal force H1 borne by the top of the middle tower 4 and the horizontal force H3 borne by the mid-span position (namely, the central buckle assembly 1) of the main cable 3, namely, the horizontal force H1 borne by the top of the middle tower 4 is born by the main beam 2 connected with the central buckle assembly 1;
in conclusion, after the multi-tower suspension bridge reinforcing structure for overcoming the middle tower effect is used, not only is the longitudinal deflection peak reduced, but also the middle tower 4 receives horizontal force and is partially shared by the main beams 2, so that the multi-tower suspension bridge reinforcing structure can effectively overcome the middle tower effect, has high resistance to the horizontal deflection increment, and can still ensure the safety of a cable bridge even if the main span is fully loaded.
The multi-tower suspension bridge reinforcing structure for overcoming the middle tower effect is simple in structure and low in installation cost, the central buckle assembly is installed in the main cable span, two central buckles in the central buckle assembly and one section of the main beam form a triangular truss, the strength of the whole central buckle assembly is effectively improved, the rigidity of the multi-tower suspension bridge can be effectively improved, the resistance to horizontal deflection increment is high, the safety of the bridge is still guaranteed even if the main span is fully loaded, the stability of the central buckle assembly is good, and the service life is long.
Second embodiment, as also shown in fig. 1 to 6, is only one embodiment of the present invention, and on the basis of the first embodiment, in the multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect of the present invention, the lengths of the first center button 11 and the second center button 12 are the same, that is, it is preferable that the triangular truss is an isosceles triangle structure, so that the material selection is more uniform, the first center button 11 and the second center button 12 are more balanced with respect to the stress sharing across the main cable 3, and the strength of the suspension bridge is higher.
Of course, the middle of the first central buckle 11 is connected to the middle of the second central buckle 12 through the connecting rod 13, that is, the upper half of the first central buckle 11, the upper half of the second central buckle 12 and the connecting rod 13 form a small triangular truss, and the small triangular truss is similar to the large triangular truss, so that the structural strength of the large triangular truss can be increased, and the first central buckle 11 and the second central buckle 12 can be connected together, so that when the first central buckle 11 is stressed, the second central buckle 12 can be synchronously shared.
Furthermore, the lower end of the first center buckle 11 is connected with the bottom of the second center buckle 12 through a compensation cable 14, wherein the height of the compensation cable 14 is not lower than the height of the main beam 2, the mid-span position of the compensation cable 14 is connected with the end of the connecting rod 13 through a third center buckle 15, and the mid-span position of the compensation cable 14 is connected with the end of the connecting rod 13 far away from the third center buckle 15 through a fourth center buckle 16.
The span of the compensation cable 14 is bent upward by the pulling force of the third center button 15 and the fourth center button 16 to compensate the extension of the main cable 3, and the third center button 15, the fourth center button 16 and the connecting rod 13 form a triangular structure for enhancing the connecting strength of the connecting rod 13, so that the first center button 11 and the second center button 12 in the center button assembly are formed to compensate each other.
Finally, the first central buckle 11, the second central buckle 12, the third central buckle 15 and the fourth central buckle 16 are all rigid I-shaped pieces, rigid connection of the central buckle assembly 1 is guaranteed, the area of the end portion of the central buckle is larger under the I-shaped piece structure, and welding connection of the central buckle is facilitated.
Third embodiment, as also shown in fig. 1 to 6, which is only one embodiment of the present invention, based on any of the above embodiments, in the multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect, the main cable 3 is provided with a bolt ball 31 at a mid-span position for connecting with the center buckle assembly 1, and the ends of the first center buckle 11 and the second center buckle 12 are provided with welding grooves 111 for welding with the bolt ball 31; at least a part of the bolt ball 31 is clamped into the welding groove 111, and after the first central buckle 11 and the second central buckle 12 with proper lengths are selected to complete the matching with the midspan position of the main cable 3, the bolt ball 31 at the midspan position of the main cable 3 is clamped into the welding groove 111 to complete the welding.
Similarly, an anchoring ring 22 is arranged at the joint of the hanger rod 6 and the main beam 2, a welding handle 112 for welding with the anchoring ring 22 is arranged at one end of the first central buckle 11 away from the welding groove 111 and one end of the second central buckle 12 away from the welding groove 111, and the welding handle 112 is welded with the anchoring ring 22 after the welding handle 112 is inserted into the anchoring ring 22.
Finally, 2 downside of girder is provided with be used for with the foundation post 21 that well tower 4 and limit tower 5 are connected, accurate saying, do not have a main part tower (including well tower 4 and limit tower 5) below all an organic whole to be connected with a foundation post 21, foundation post 21 sets up in ground for reinforced concrete column, girder 3 then level sets up in main part tower and foundation post 21 handing-over department.
The multi-tower suspension bridge reinforcing structure for overcoming the middle tower effect is simple in structure and low in installation cost, the central buckle assembly is installed in the main cable span, two central buckles in the central buckle assembly and one section of the main beam form a triangular truss, the strength of the whole central buckle assembly is effectively increased, the rigidity of the multi-tower suspension bridge can be effectively improved, the resistance to horizontal deflection increment is high, the safety of the bridge is still guaranteed even if the main span is fully loaded, even a compensation cable can be additionally installed on the triangular truss, the two central buckles in the central buckle assembly are further mutually compensated, the abrasion of the central buckle assembly is effectively reduced, the service life is long, and the maintenance cost is reduced.
The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect, characterized in that: the middle tower is characterized by comprising a middle tower (4), a side tower (5), a main cable (3) used for connecting the top of the middle tower (4) and the top of the side tower (5), a main beam (2) used for connecting the bottom of the middle tower (4) and the bottom of the side tower (5) and a central buckle assembly (1) used for connecting the main cable (3) and the main beam (2), wherein the central buckle assembly (1) comprises a first central buckle (11) and a second central buckle (12), the first central buckle (11) and the second central buckle (12) are I-shaped pieces, the upper ends of the first central buckle (11) and the second central buckle (12) are connected with the middle crossing position of the main cable (3), a plurality of hanging rods (6) are connected between the main cable (3) and the main beam (2), the middle crossing position of the main cable (3) is close to the hanging rod (6) on one side of the middle tower (4) and the connection position of the main beam (2) are connected with the lower end of the first central buckle (11), the joint of a suspender (6) at one side of the main cable (3) close to the side tower (5) and the main beam (2) is connected with the lower end of the second central buckle (12).
2. A multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect according to claim 1, wherein: the first central button (11) and the second central button (12) have the same length.
3. A multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect according to claim 1, wherein: the middle part of the first central buckle (11) is connected with the middle part of the second central buckle (12) through a connecting rod (13).
4. A multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect according to claim 3, wherein: the lower end of the first central buckle (11) is connected with the bottom of the second central buckle (12) through a compensating cable (14).
5. A multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect according to claim 4, wherein: the height of the compensation cable (14) is not lower than that of the main beam (2), the midspan position of the compensation cable (14) is connected with the end of the connecting rod (13) through a third central buckle (15), and the midspan position of the compensation cable (14) is connected with one end, far away from the third central buckle (15), of the connecting rod (13) through a fourth central buckle (16).
6. A multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect according to claim 5, wherein: the third central button (15) and the fourth central button (16) are I-shaped pieces.
7. A multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect according to claim 6, wherein: the first central button (11), the second central button (12), the third central button (15) and the fourth central button (16) are all rigid pieces.
8. A multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect according to claim 1, wherein: the middle position is striden in main push-towing rope (3) be provided with be used for with central knot subassembly (1) is connected bolt ball (31), first central knot (11) and second central knot (12) tip all be provided with be used for with bolt ball (31) welded welding groove (111).
9. A multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect according to claim 8, wherein: the jib (6) with girder (2) junction is provided with anchor ring (22), first central authorities detain (11) and keep away from the one end of welding groove (111) and second central authorities detain (12) keep away from the one end of welding groove (111) all be provided with be used for with anchor ring (22) welded welding handle (112).
10. A multi-tower suspension bridge reinforcing structure for overcoming the mid-tower effect according to claim 1, wherein: the lower side of the main beam (2) is provided with a foundation column (21) which is used for being connected with the middle tower (4) and the side tower (5).
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2022
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