A concrete portal tower reinforcement structure for cable-stayed bridges

Abstract

The present invention belongs to the technical field of bridge engineering, and in particular relates to a reinforced structure for a concrete portal tower of a cable-stayed bridge, comprising: two symmetrically arranged towers, the bottom ends of the towers being fixedly connected to a pedestal, the bottom ends of the pedestals being fixedly connected to a pier, the bottom ends of the piers being fixedly connected to a fixing portion, the fixing portion being fixed to the ground, a bearing portion being fixedly connected between the two towers, a bridge being built on the top of the bearing portion, a horizontally arranged upper crossbeam being fixedly connected between the tops of the two towers, and a reinforcing structure being provided between both ends of the towers and the two upper crossbeams. The present invention overcomes the shortcomings of traditional cable-stayed bridges in which vertical prestressing is provided inside the towers to improve stress, resulting in a complex internal structure of the towers and difficulty in controlling the effectiveness of the prestressing. By providing a reinforcing structure between the two ends of the upper crossbeam and the two towers, the connection strength at the connection between the top ends of the towers and the upper crossbeam is effectively improved, the lateral bending moment at the top ends of the towers is reduced, and the durability of the towers is improved, while at the same time, the climbing formwork construction of the towers and the towers is not affected.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a concrete portal tower reinforcement structure for a cable-stayed bridge. Background Art

[0002] Cable towers are the main load-bearing components of cable-stayed bridges, typically constructed of concrete. They primarily withstand bending moments and axial forces, and portal towers are a common type of cable tower used in cable-stayed bridges. In recent years, to enhance the landscape of cable towers, portal tower columns have often been designed with a certain inclination angle. Due to the tower's height and inclination, the top section of the tower column often needs to withstand large lateral bending moments. When the top section of the tower column is subjected to large bending moments for extended periods, it can easily bend and deform, or even be directly damaged, endangering personnel safety. To improve the lateral force on the tower cross-section, reduce the lateral bending moment at the top of the tower column, and enhance the durability and safety of the tower structure, a reinforced concrete portal tower structure for cable-stayed bridges was proposed. Summary of the Invention

[0003] The purpose of the present invention is to provide a concrete portal tower reinforcement structure for a cable-stayed bridge to solve the above problems.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A reinforced structure of a concrete portal tower of a cable-stayed bridge comprises: two symmetrically arranged tower columns, the bottom ends of the tower columns are fixedly connected to a pedestal, the bottom ends of the pedestal are fixedly connected to a pier column, the bottom ends of the pier columns are fixedly connected to a fixing portion, the fixing portion is fixed to the ground, a bearing portion is fixedly connected between the two tower columns, a bridge is constructed on the top of the bearing portion, a horizontally arranged upper cross beam is fixedly connected between the top ends of the two tower columns, and a reinforcing structure is provided between both ends of the tower columns and the two upper cross beams.

[0006] Preferably, the stiffening structure includes two stiffening ribs arranged between the end of the upper cross beam and the top of the tower column, the two stiffening ribs are arranged parallel and symmetrically, the stiffening ribs are in the shape of a Chinese character "F", the top of the stiffening rib is fixed to the bottom surface of the upper cross beam, the outer wall of the stiffening rib is fixed to the tower column, the two stiffening ribs are fixed by a number of cross plates, and the cross plates are arranged at equal intervals along the length direction of the stiffening ribs.

[0007] Preferably, the fixing portion includes a plurality of fixing columns, and the plurality of fixing columns are arranged in an array, the bottom ends of the plurality of fixing columns penetrate into the ground, and the top ends of the plurality of fixing columns penetrate out of the ground and are all fixedly connected to the bottom ends of the pier columns.

[0008] Preferably, the bearing portion includes a horizontally arranged lower cross beam, both ends of the lower cross beam are respectively fixed to the two tower columns, the lower cross beam is close to the bottom end of the tower column, the lower cross beam is located above the pedestal, and the bridge is erected on the top of the lower cross beam.

[0009] Preferably, a plurality of cable holes are provided on the tower column, wherein a plurality of the cable holes are close to the top of the tower column, and the plurality of the cable holes are arranged at equal intervals along the length direction of the tower column.

[0010] Compared with the prior art, the present invention has the following advantages and technical effects:

[0011] The present invention overcomes the shortcomings of traditional cable-stayed bridges that set vertical prestressing inside the tower column to improve stress, resulting in complex internal structure of the tower column and difficult to control the effectiveness of prestressing. By setting a stiffening structure between the two ends of the upper crossbeam and the two tower columns, the connection strength of the connection between the top of the tower column and the upper crossbeam is effectively improved, the lateral bending moment at the top of the tower column is reduced, and the durability of the tower column is improved. At the same time, it will not affect the climbing formwork construction of the cable tower column. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0013] Figure 1 It is the front view of the present invention;

[0014] Figure 2 It is a left side view of the present invention;

[0015] Figure 3 This is a front view of Example 2 of the present invention;

[0016] Figure 4 for Figure 3 AA section view in;

[0017] Figure 5 for Figure 3 A partial enlarged view of point B in the middle;

[0018] Figure 6 This is a front view of Example 3 of the present invention;

[0019] Among them, 1. tower column; 2. pier column; 3. fixed column; 4. lower beam; 5. bridge; 6. pedestal; 7. cable hole; 8. stiffening rib plate; 9. upper beam; 10. first fixed plate; 11. second fixed plate; 12. first connecting plate; 13. slide plate; 14. friction plate; 15. top block; 16. vertical plate; 17. first screw; 18. hinged column; 19. cover plate; 20. third fixed plate; 21. rib column; 22. fixed block; 23. rib plate; 24. second connecting plate; 25. short shaft; 26. second screw; 27. first cable body; 28. second cable body; 29. ​​third cable body; 30. first hinge seat; 31. second hinge seat; 32. balancing ball; 33. damping rod; 34. clamping plate; 35. bearing plate; 36. reinforcement plate. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] Reference Figures 1 to 2 The present embodiment provides a reinforced structure of a concrete portal tower of a cable-stayed bridge, comprising: two symmetrically arranged tower columns 1, the bottom ends of the tower columns 1 are fixedly connected to a pedestal 6, the bottom ends of the pedestal 6 are fixedly connected to a pier column 2, the bottom ends of the pier columns 2 are fixedly connected to a fixing portion, the fixing portion is fixed to the ground, a bearing portion is fixedly connected between the two tower columns 1, a bridge 5 is constructed on the top of the bearing portion, a horizontally arranged upper cross beam 9 is fixedly connected between the top ends of the two tower columns 1, and a reinforcing structure is provided between both ends of the tower columns 1 and the two upper cross beams 9.

[0024] The present invention overcomes the shortcomings of traditional cable-stayed bridges in which vertical prestressing is set inside the tower column 1 to improve stress, resulting in a complex internal structure of the tower column 1 and difficulty in controlling the effectiveness of the prestressing. By setting a stiffening structure between the two ends of the upper crossbeam 9 and the two tower columns 1, the connection strength at the connection between the top of the tower column 1 and the upper crossbeam 9 is effectively improved, the lateral bending moment at the top of the tower column 1 is reduced, and the durability of the tower column 1 is improved. At the same time, it will not affect the climbing formwork construction of the cable tower column 1.

[0025] To further optimize the solution, the stiffening structure includes two stiffening ribs 8 arranged between the end of the upper crossbeam 9 and the top of the tower column 1. The two stiffening ribs 8 are arranged in parallel and symmetrically. The stiffening ribs 8 are in the shape of a Chinese character "F". The top of the stiffening rib 8 is fixedly connected to the bottom surface of the upper crossbeam 9, and the outer wall of the stiffening rib 8 is fixedly connected to the tower column 1. The two stiffening ribs 8 are fixedly connected by a number of transverse plates, and the transverse plates are arranged at equal intervals along the length direction of the stiffening ribs 8. The stiffening ribs 8 are arranged in the shape of a Chinese character "F" and are welded along the connection between the upper crossbeam 9 and the tower column 1, thereby increasing the connection strength of the connection between the upper crossbeam 9 and the tower column 1 and reducing the lateral bending moment at the top of the tower column 1. At the same time, there are two stiffening ribs 8, and a number of transverse plates are arranged between the two stiffening ribs 8 to prevent the two stiffening ribs 8 from bending under stress, further strengthening the connection strength of the connection between the upper crossbeam 9 and the tower column 1.

[0026] In a further optimized solution, the fixing portion includes a plurality of fixing columns 3 arranged in an array, with the bottom ends of the plurality of fixing columns 3 penetrating the ground and the top ends of the plurality of fixing columns 3 protruding from the ground and fixedly connected to the bottom ends of the pier columns 2. The function of the fixing columns 3 is to fix the pier columns 2 to the ground.

[0027] In a further optimized solution, the load-bearing portion includes a horizontally arranged lower crossbeam 4, with both ends of the lower crossbeam 4 fixedly connected to the two tower columns 1. The lower crossbeam 4 is close to the bottom end of the tower column 1 and is located above the pedestal 6. The bridge 5 is erected on the top of the lower crossbeam 4. On the one hand, the lower crossbeam 4 plays a load-bearing role for erecting the bridge 5, and on the other hand, it can also reduce the bending moment at the top of the tower column 1.

[0028] As a further optimization, a plurality of cable holes 7 are provided on the tower column 1, with a plurality of cable holes 7 being located near the top of the tower column 1 and being evenly spaced along the length of the tower column 1. One end of the rigging is connected to the cable hole 7, and the other end is connected to the bridge 5, thereby reinforcing the bridge.

[0029] Example 2

[0030] Reference Figures 3 to 5 , which is different from Example 1 in that a cover plate 19 is fixed to the top surface of the pier column 2 by a second screw 26, a hinged column 18 is provided inside the pier column 2, and short shafts 25 are coaxially fixed to both ends of the hinged column 18. The short shaft 25 is rotatably connected to the pier column 2, and the top end of the hinged column 18 protrudes from the top surface of the cover plate 19 and is fixed to a second connecting plate 24. The top end of the second connecting plate 24 is fixed to a horizontally arranged rib plate 23, and the tower column 1 is fixed to the top surface of the rib plate 23;

[0031] A plurality of ribs 21 are fixedly connected to both sides of the rib plate 23. The ribs 21 are arranged at equal intervals along the length of the hinge column 18. A fixing block 22 is fixedly connected to the outer wall of the rib column 21. The top of the rib column 21 is threadedly connected to a first nut. The rib plate 23 is located between the first nut and the fixing block 22. The bottom end of the rib column 21 penetrates into the pier column 2 and is fixedly connected to a third fixing plate 20. The third fixing plate 20 and the pier column 2 are integrally cast.

[0032] A plurality of friction grooves are provided on the side wall of the hinge column 18, and the plurality of friction grooves are arranged at equal intervals along the length direction of the hinge column 18, the friction grooves are perpendicular to the axis of the hinge column 18, and the friction grooves are located at the bottom end of the hinge column 18. The side wall of the friction groove is in friction contact with the friction plate 14, and a gap is left between the friction plate 14 and the groove bottom of the friction groove. A slide plate 13 is fixed to the bottom end of the friction plate 14, and the slide plate 13 is slidably connected in the slide groove, and the slide groove is provided on the top surface of the first fixed plate 10. The first fixed plate 10 is located directly below the hinge column 18, and a vertical slot is provided on the friction plate 14, and the slot is parallel to the friction plate 14. A card plate 34 is inserted into the slot, and a first connecting plate 12 is fixed to the bottom surface of the first fixed plate 10, and a horizontally arranged second fixed plate 11 is fixed to the bottom end of the first connecting plate 12;

[0033] An insertion groove is provided on one side of the pier 2, in which a top block 15 is slidably connected. One end of the top block 15 abuts against the friction plate 14, and the other end of the top block 15 is fixedly connected to a vertical plate 16. The vertical plate 16 is detachably connected to the side wall of the pier 2 by a first screw 17.

[0034] Example 3

[0035] Reference Figure 6 The difference between this embodiment and embodiment 1 and embodiment 2 is that: a horizontally arranged bearing plate 35 is fixed between the two tower columns 1, and a reinforcing plate 36 is fixed between the two ends of the bearing plate 35 and the two tower columns 1. The reinforcing plate 36 is located on the bottom surface of the bearing plate 35, and two symmetrically arranged first hinge seats 30 are fixed on the top surface of the bearing plate 35. The two first hinge seats 30 are respectively located at the two ends of the bearing plate 35. The two first hinge seats 30 are respectively hinged (preferably ball joints) with one end of the damping rod 33, and the other ends of the two damping rods 33 are hinged (preferably ball joints) through the second hinge seat 31 in the balance. On the outer wall of the ball 32, two damping rods 33 are symmetrically arranged. The top of the balancing ball 32 is fixedly connected to the bottom end of the first cable body 27. The top of the first cable body 27 is fixedly connected to the middle of the upper crossbeam 9. Two second cable bodies 28 and two third cable bodies 29 are respectively provided on both sides of the first cable body 27. The two second cable bodies 28 are symmetrically arranged, and the two third cable bodies 29 are symmetrically arranged. One end of the third cable body 29 is fixedly connected to the outer wall of the balancing ball 32, and the other end is fixedly connected to the bottom end of the stiffening rib 8. One end of the second cable body 28 is fixedly connected to the outer wall of the balancing ball 32, and the other end is fixedly connected to the top of the stiffening rib 8.

[0036] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A concrete portal tower reinforcement structure for a cable-stayed bridge, characterized in that: Including: Two symmetrically arranged tower columns (1), the bottom ends of the tower columns (1) are provided with pier columns (2), the bottom ends of the pier columns (2) are fixedly connected with fixing parts, the fixing parts are fixed to the ground, a bearing part is fixedly connected between the two tower columns (1), the top end of the bearing part is provided with a bridge (5), a horizontally arranged upper cross beam (9) is fixedly connected between the top ends of the two tower columns (1), and stiffening structures are arranged between the two ends of the tower column (1) and the two upper cross beams (9); The stiffening structure includes two stiffening rib plates (8) arranged between the top ends of the tower columns (1) at the ends of the upper cross beam (9), the two stiffening rib plates (8) are parallel and symmetrically arranged, the stiffening rib plates (8) are in the shape of a factory character, the top ends of the stiffening rib plates (8) are fixedly connected to the bottom surface of the upper cross beam (9), the outer side walls of the stiffening rib plates (8) are fixedly connected to the tower columns (1), and the two stiffening rib plates (8) are fixedly connected by a plurality of transverse plates, and the plurality of transverse plates are arranged at equal intervals along the length direction of the stiffening rib plates (8); A horizontally arranged bearing plate (35) is fixedly connected between the two tower columns (1), reinforcing plates (36) are fixedly connected between the two ends of the bearing plate (35) and the two tower columns (1), the reinforcing plates (36) are located on the bottom surface of the bearing plate (35), two symmetrically arranged first hinge seats (30) are fixedly connected to the top surface of the bearing plate (35), the two first hinge seats (30) are respectively located at the two ends of the bearing plate (35), one ends of two damping rods (33) are respectively ball-hinged to the two first hinge seats (30), the other ends of the two damping rods (33) are ball-hinged to the outer side wall of a balance ball (32) through second hinge seats (31), the two damping rods (33) are symmetrically arranged, the bottom end of a first cable body (27) is fixedly connected to the top end of the balance ball (32), the top end of the first cable body (27) is fixedly connected to the middle of the upper cross beam (9), two second cable bodies (28) and two third cable bodies (29) are respectively arranged on both sides of the first cable body (27), the two second cable bodies (28) are symmetrically arranged, the two third cable bodies (29) are symmetrically arranged, one end of the third cable body (29) is fixedly connected to the outer side wall of the balance ball (32), and the other end is fixedly connected to the bottom end of the stiffening rib plate (8), and one end of the second cable body (28) is fixedly connected to the outer side wall of the balance ball (32), and the other end is fixedly connected to the top end of the stiffening rib plate (8); A cover plate (19) is fixedly connected to the top surface of the pier column (2) through a second screw (26), a hinge column (18) is arranged inside the pier column (2), short shafts (25) are coaxially fixedly connected to both ends of the hinge column (18), the short shafts (25) are rotationally connected inside the pier column (2), the top end of the hinge column (18) protrudes from the top surface of the cover plate (19) and is fixedly connected to a second connecting plate (24), a horizontally arranged rib plate (23) is fixedly connected to the top end of the second connecting plate (24), and the tower column (1) is fixedly connected to the top surface of the rib plate (23); A plurality of rib columns (21) are fixedly connected to both sides of the rib plate (23), and the rib columns (21) are arranged at equal intervals along the length direction of the hinge column (18). A fixing block (22) is fixedly connected to the outer wall of the rib column (21). The top end of the rib column (21) is threadedly connected to a first nut. The rib plate (23) is located between the first nut and the fixing block (22). The bottom end of the rib column (21) penetrates into the pier column (2) and is fixedly connected to a third fixing plate (20). The third fixing plate (20) and the pier column (2) are integrally cast; A plurality of friction grooves are provided on the side wall of the hinge column (18), and the plurality of friction grooves are arranged at equal intervals along the length direction of the hinge column (18). The friction grooves are perpendicular to the axis of the hinge column (18). The friction grooves are located at the bottom end of the hinge column (18). The side wall of the friction groove is in friction contact with a friction plate (14). A gap is left between the friction plate (14) and the bottom of the friction groove. The bottom end of the friction plate (14) is fixedly connected to a slide plate (13). The slide plate (13) slides The sliding groove is movably connected in the sliding groove, and the sliding groove is provided on the top surface of the first fixed plate (10). The first fixed plate (10) is located directly below the hinge column (18). A vertical slot is provided on the friction plate (14). The slot is arranged parallel to the friction plate (14). A clamping plate (34) is inserted into the slot. A first connecting plate (12) is fixedly connected to the bottom surface of the first fixed plate (10). A horizontally arranged second fixed plate (11) is fixedly connected to the bottom end of the first connecting plate (12). An insertion groove is provided on one side of the pier column (2), a top block (15) is slidably connected in the insertion groove, one end of the top block (15) abuts against the friction plate (14), and the other end of the top block (15) is fixedly connected to a vertical plate (16), and the vertical plate (16) is detachably connected to the side wall of the pier column (2) through a first screw (17).

2. The concrete portal tower reinforcement structure for a cable-stayed bridge according to claim 1, characterized in that: The fixing portion comprises a plurality of fixing columns (3), wherein the plurality of fixing columns (3) are arranged in an array, the bottom ends of the plurality of fixing columns (3) penetrate into the ground, and the top ends of the plurality of fixing columns (3) penetrate out of the ground and are all fixedly connected to the bottom ends of the pier columns (2).

3. The concrete portal tower reinforcement structure for a cable-stayed bridge according to claim 1, characterized in that: The bearing portion includes a horizontally arranged lower crossbeam (4), the two ends of the lower crossbeam (4) are respectively fixed to the two tower columns (1), the lower crossbeam (4) is close to the bottom end of the tower column (1), the lower crossbeam (4) is located above the pier column (2), and the bridge (5) is built on the top end of the lower crossbeam (4).

4. The concrete portal tower reinforcement structure for a cable-stayed bridge according to claim 1, characterized in that: A plurality of cable holes (7) are provided on the tower column (1), wherein the plurality of cable holes (7) are close to the top of the tower column (1), and the plurality of cable holes (7) are arranged at equal intervals along the length direction of the tower column (1).

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