Cable-stayed bridge ring tower supporting device

Abstract

The application discloses a cable-stayed bridge ring tower supporting device, which comprises a ring tower, a positioning beam penetrating through the ring tower, and a stand column arranged in the ring tower, wherein the stand column is distributed in two rows, the upper end of the stand column is connected with the inner side wall of the ring tower, the lower end of the stand column is connected with the positioning beam, every two adjacent stand columns are connected through a connecting piece, the side wall of every row of stand columns is provided with a supporting rod and a pull rod from top to bottom, the two ends of the supporting rod and the pull rod are connected with the adjacent ring tower side wall respectively, first fork support structures are arranged between transversely adjacent two supporting rods in the two rows of stand columns, and second fork support structures are arranged between longitudinally adjacent supporting rods and pull rods on every row of stand columns. The rigidity of the cable tower segment in the subsequent construction process is increased, the pull rod and the supporting rod are prevented from losing the original function due to the deformation caused by the vertical force, meanwhile, the construction period is saved, and the construction cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridges, and relates to a cable-stayed bridge ring tower supporting device. BACKGROUND

[0002] With the rapid development of the transportation industry, bridges not only meet the basic traffic function, but also reflect the important landscape engineering of the city image, so various special-shaped tower cable-stayed bridges are produced, and the complexity of the bridge tower structure is continuously improved. If no measures are taken to control the construction of the cable-stayed tower during the construction process, the tower limb of the cable-stayed tower will generate excessive stress and deformation under its own weight.

[0003] In the existing special-shaped tower construction process, a horizontal pull rod is generally arranged at the outward inclined position of the cable-stayed tower limb, the pull rod is tensioned and anchored, the horizontal pull force is used to control the excessive outward inclination, a horizontal support rod is arranged at the inward inclined position of the cable-stayed tower limb, and the support of the horizontal support rod is used to control the excessive inward inclination of the tower limb. The cable-stayed tower of the ring tower cable-stayed bridge is a spatial curved structure, the vertical inclination angle of the cable-stayed tower segment continuously changes, and at the later stage of the construction, the lower segment of the cable-stayed tower is outward inclined, the upper segment is inward inclined, and the two exist simultaneously and influence each other. The traditional single pull rod or support rod cannot well solve the problem of excessive stress and deformation of the cable-stayed tower structure, and if multiple supports are arranged to increase the rigidity of the cable-stayed tower, the construction period will be delayed and the cost will be increased. SUMMARY

[0004] The purpose of the present application is to solve the problem of poor rigidity supporting effect of the ring tower in the prior art, and to provide a cable-stayed bridge ring tower supporting device.

[0005] To achieve the above purpose, the following technical solutions are adopted in the present application:

[0006] A cable-stayed bridge ring tower supporting device, comprising a ring tower, a positioning beam penetrating through the inside of the ring tower, a stand column arranged inside the ring tower, the stand column being distributed in two rows, the upper end of the stand column being connected with the inner side wall of the ring tower, the lower end being connected with the positioning beam, and every two adjacent stand columns being connected through a connecting piece.

[0007] The side wall of each row of stand columns is provided with a support rod and a pull rod from top to bottom, the two ends of the support rod and the pull rod being connected with the adjacent side wall of the ring tower respectively, and in the two rows of stand columns, a first cross support structure is arranged between the two horizontally adjacent support rods, and a second cross support structure is arranged between the vertically adjacent support rod and pull rod of each row of stand columns.

[0008] Further improvement of the present application is as follows:

[0009] The end part of the first cross support structure is connected with the connecting part of the support rod and the stand column respectively.

[0010] The first fork support structure includes two intersecting first diagonal braces, the ends of which are connected to a corresponding support rod and column.

[0011] The second fork support structure includes two intersecting second diagonal braces. One end of the second diagonal brace is connected to the connection between the support rod and the column, and the other end is connected to the connection between the tie rod and the column.

[0012] The second fork support structure is symmetrically distributed along the two rows of columns, and the two opposite second fork support structures are connected by a crossbar.

[0013] The two ends of the crossbar are respectively connected to the intersection of the two corresponding second diagonal braces.

[0014] The support rods, tie rods, and columns are all connected to the inner wall of the ring tower via prefabricated components.

[0015] The prefabricated component includes a first fixing plate, the lower end of which is connected to a second fixing plate, and a support member is provided between the second fixing plate and the first fixing plate.

[0016] Both the support rod and the tie rod are made of H-beams.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention discloses a support device for a cable-stayed bridge ring tower. Two rows of columns are installed inside the ring tower, each with support rods and tie rods. This ensures that two support rods and two tie rods work together with the columns to provide support, creating a closed support structure that restrains each other and reduces the compressive stress caused by the inward inclination of the upper segments. Furthermore, forked bracing structures are installed between tie rods, between support rods, and between tie rods and support rods. This improves the rigidity of the support and prevents torsion of the tower segments. The columns transmit the vertical components of the outward and inward inclination of the tower segments to the tie rods and support rods to the tower base, increasing the rigidity of the tower segments during subsequent construction and preventing the tie rods and support rods from deforming and losing their original function due to vertical forces. This also saves construction time and reduces construction costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of the support device of the present invention;

[0021] Figure 2 This is a top view of the upper support rod (lower tie rod) fork support device of the present invention;

[0022] Figure 3 This is a top view of the spatial fork support device between the strut and tie rod of the present invention;

[0023] Figure 4 This is a top view of the support rod and tie rod of the present invention;

[0024] Figure 5 This is a structural diagram of the preform of the present invention.

[0025] Wherein: 1-support rod; 2-tie rod; 3-column; 4-prefabricated component; 5-connector; 6-second diagonal brace;

[0026] 101-First diagonal brace; 102-Precast component support rod; 401-First fixing plate; 402-Second fixing plate; 403-Support component; 601-Horizontal bar. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0033] The present invention will now be described in further detail with reference to the accompanying drawings:

[0034] See Figures 1 to 5 This invention discloses a support device for a cable-stayed bridge ring tower. A positioning beam runs through the ring tower and is located near the lower end of the ring tower. Two rows of columns 3 are installed inside the ring tower, with four columns 3 installed at intervals in each row. The number of columns 3 is the same in both rows. The upper end of the columns 3 is connected to the inner wall of the ring tower, and the lower end is connected to the positioning beam.

[0035] Furthermore, in this embodiment of the invention, a support rod 1 is connected to the upper part of the side wall of the column 3, and a tie rod 2 is connected to the lower part. The two ends of the support rod 1 and the tie rod 2 are respectively connected to the inner side wall of the nearby annular tower. The support rods 1 and the tie rods 2 on the two rows of columns 3 are symmetrically arranged, so that there are two support rods 1 and two tie rods 2 inside the annular tower. The two support rods 1 and the two tie rods 2 are arranged in parallel, wherein the support rods 1 and the tie rods 2 are perpendicularly distributed to the connected columns 3.

[0036] Furthermore, in this embodiment of the invention, each pair of adjacent left and right or front and back columns 3 are connected by a connector 5, and several connectors 5 are arranged at intervals along the column 3 from top to bottom.

[0037] Furthermore, in this embodiment of the invention, a first fork brace structure is provided between two laterally adjacent support rods 1, and a prefabricated component support structure is installed between two laterally adjacent tie rods 2. The first fork brace structure and the prefabricated component support structure are vertically symmetrical and structurally identical, specifically:

[0038] The first fork support structure includes two cross-installed first diagonal braces 101. One end of the first diagonal brace 101 is welded to the connection point formed by the connector 5, one of the support rods 1 (or tie rods 2), and the column 3. The other end is welded to the connection point formed by the other support rod 1 (or tie rod 2), the connector 5, and the column 3. The two first diagonal braces 101 are cross-installed to form an "X"-shaped structure. The X-shaped structure can strengthen the structural strength at the connection between the tie rod 2 and the column 3 or the brace 1 and the column 3, so that the two tie rods 2 or support rods 1 are subjected to equal forces at the same time, thereby improving the ability of the support device of the present invention to resist uncoordinated deformation.

[0039] Furthermore, in this embodiment of the invention, two second fork-bracing structures are symmetrically installed, located on two rows of columns 3 respectively. The two second fork-bracing structures are symmetrically arranged and have the same structure. The specific structure is as follows:

[0040] A second diagonal brace 6 is provided between the vertically adjacent support rod 1 and tie rod 2. The upper end of the second diagonal brace 6 is welded to the common connection point of the support rod 1, column 3 and connector 5, and the lower end is welded to the connection point formed between the tie rod 2, column 3 and connector 5.

[0041] Furthermore, in this embodiment of the invention, the connector 5 is a channel steel, and the column 3 is erected section by section using steel pipes. At the same time, every 2m, four channel steels are used to weld and connect the four columns on the adjacent sides. The four channel steels are connected on the same horizontal plane. The connector 5 connects the four columns into a whole, which can better bear the load and facilitates the transmission of the vertical force borne by the tie rod and the strut to the tower base, thereby further improving the ability of the support device of the present invention to resist uncoordinated deformation.

[0042] Furthermore, one or two second diagonal braces 6 can be welded depending on the situation. When two are welded, the two second diagonal braces 6 are distributed in an intersecting manner to form an "X"-shaped structure. An X-shaped fork brace structure is formed between the support rod 1 and the tie rod 2 to connect the upper and lower support devices together, mutually restrain each other, and prevent one side from deforming too much. Moreover, the fork brace structure increases the rigidity of the support device between the columns, making it less prone to vertical deformation and better playing its supporting and tensioning role.

[0043] Furthermore, a crossbar 601 is provided between the two rows of columns 3. One end of the crossbar 601 is connected to the intersection of two second diagonal braces 6 on one side, and the other end is connected to the intersection of two second diagonal braces 6.

[0044] When the two second diagonal braces 6 are distributed in an intersecting manner, the crossbar 601 is connected to the connection point at the intersection of the two second diagonal braces 6.

[0045] Furthermore, in this embodiment of the invention, prefabricated components 4 are provided at the connection points of the support rod 1, the tie rod 2, the column 3, and the annular tower. The prefabricated components include a first fixing plate 401 horizontally welded to the inner side of the annular tower, a second fixing plate 402 welded to the lower end of the first fixing plate 401, and a support component 403 welded between the second fixing plate 402 and the first fixing plate 401. The support component 403 is installed at a 45° angle to the first fixing plate 401.

[0046] Furthermore, in this embodiment of the invention, the support rod 1 and the tie rod 2 are internally welded prefabricated support rod 102.

[0047] Furthermore, in this embodiment of the invention, the tie rod 2 and the support rod 1 are welded to the column 3, and the tie rod 2, the support rod 1 and the column 3 are welded to the prefabricated part 4.

[0048] Furthermore, in this embodiment of the invention, both the tie rod 2 and the support rod 1 are made of H-beams spliced ​​together, which has greater rigidity and a flat surface that is easy to weld and install compared with steel pipes.

[0049] Installation principle of this invention embodiment:

[0050] S1: Weld precast component 4 to the preset position on the ring tower segment;

[0051] S2: Erect the two side columns 3, and weld the connectors 5 every 2m;

[0052] S3: Once the column 3 is erected to the position of the lower pre-welded part 4, hoist the lower tie rod 2 to the side wall of the column 3, and weld the tie rod 2 to the column 3 and the pre-welded part 4 respectively. After completion, weld the prefabricated support structure between the two tie rods 2.

[0053] S4: Continue to erect column 3. When column 3 reaches the position of the upper support rod 1 pre-set part, hoist the upper support rod 1 to column 3. Weld the support rod 1 to column 3 and prefabricated part 4 respectively. After completion, weld the first fork support structure between the two support rods 1.

[0054] S5: Weld the second fork support structure between the upper support rod 1 and the lower tie rod 2 on the same side.

[0055] S6: Continue erecting column 3 until it is welded to the pre-welded component of the upper ring tower column.

[0056] This invention was applied to the construction of a bridge, specifically the A1 circular steel single-tower cable-stayed bridge in the third section of a project. The bridge is 245m long, with a span arrangement of (2×30)+(2×60)+(2×30)m, forming a 6-span circular steel single-tower spatial cable-stayed bridge. The bridge is 28m wide, with a longitudinal slope of 3% in both directions and a cross slope of 1.5% in both directions.

[0057] The bridge tower is a steel structure with a variable cross-section ring shape. The outer diameter of the ring is 34m, and the inner diameter is 28m. The centers of the inner and outer rings do not coincide, with the inner ring's center offset vertically by 0.5m from the outer ring's center. The tower's cross-section is a single-box, double-cell structure with an incised angle. The cross-section is 3m wide laterally, and the height gradually changes from 2.5m at the top to 3.5m at the bottom. The incised angle is 4:1, and the incised angle height gradually changes from 50cm at the top to 150cm at the bottom. During construction, the tower was erected in nine segments, all of which were constructed using gantry cranes for hoisting and welding.

[0058] Table 1 below is a comparison table of stress simulation at the horizontal axis position of the ring tower using the support device of the present invention and not using the support device of the present invention:

[0059] Table 1. Stress Comparison at the Horizontal Axis Position of the Tower in Subsequent Segments (Unit: MPa)

[0060]

[0061] The results show that the support device can significantly reduce the stress at the inward and outward tilt positions of the ring tower, and significantly improve the stiffness of the ring tower. This provides a favorable foundation for the subsequent installation of cable guide pipes and cable tensioning, avoids cable force changes caused by excessive displacement of the ring tower, and promotes the formation of a reasonable bridge structure.

[0062] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A ring tower support device for a cable-stayed bridge, characterized in that, Includes columns (3), which are set inside the annular tower to be supported. A positioning beam runs through the annular tower. The columns (3) are distributed in two rows. The upper end of the columns (3) is connected to the inner wall of the annular tower, and the lower end is connected to the positioning beam. Each pair of adjacent columns (3) are connected by connectors (5). Each row of columns (3) has a support rod (1) and a tie rod (2) on its side wall from top to bottom. The two ends of the support rod (1) and the tie rod (2) are respectively connected to the side wall of the nearby annular tower. In the two rows of columns (3), a first fork support structure is provided between two horizontally adjacent support rods (1), and a second fork support structure is provided between the longitudinally adjacent support rods (1) and tie rods (2) on each row of columns (3).

2. The cable-stayed bridge ring tower support device according to claim 1, characterized in that, The ends of the first fork support structure are connected to the connection points of the support rod (1) and the column (3), respectively.

3. The cable-stayed bridge ring tower support device according to claim 2, characterized in that, The first fork support structure includes two intersecting first diagonal braces (101), the ends of which are connected to a corresponding support rod (1) and column (3).

4. The cable-stayed bridge ring tower support device according to claim 1, characterized in that, The second fork support structure includes two intersecting second diagonal braces (6). One end of the second diagonal brace (6) is connected to the connection between the support rod (1) and the column (3), and the other end is connected to the connection between the tie rod (2) and the column (3).

5. A cable-stayed bridge ring tower support device according to claim 4, characterized in that, The second fork support structure is symmetrically distributed along the two rows of columns (3), and the two opposite second fork support structures are connected by a crossbar (601).

6. A cable-stayed bridge ring tower support device according to claim 5, characterized in that, The two ends of the crossbar (601) are respectively connected to the intersection of the two corresponding second diagonal braces (6).

7. A cable-stayed bridge ring tower support device according to claim 1, characterized in that, The support rod (1), tie rod (2) and column (3) are all connected to the inner wall of the ring tower through prefabricated parts (4).

8. A cable-stayed bridge ring tower support device according to claim 7, characterized in that, The precast component (4) includes a first fixing plate (401), the lower end of the first fixing plate (401) is connected to a second fixing plate (402), and a support member (403) is provided between the second fixing plate (402) and the first fixing plate (401).

9. A cable-stayed bridge ring tower support device according to claim 1, characterized in that, Both the support rod (1) and the tie rod (2) are made of H-beams.

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