A saddle system for replacing the main cable of a suspension bridge

Abstract

The present invention belongs to the technical field of bridge construction, and discloses a saddle system for replacing the main cable of a suspension bridge, comprising: an original saddle part, which is arranged on the tower body of the bridge tower; a straddle part, which includes a pair of linkage shells, the original saddle part is located between the pair of linkage shells, the two linkage shells are connected, and one side of the linkage shell close to the original saddle part cooperates with the outer wall of the original saddle part to form a pouring space, and a post-cast concrete layer is poured in the pouring space; a new saddle part, which straddles above the original saddle part and is used for installing a new main cable, and the base anchor of the new saddle part is pre-buried in the post-cast concrete layer; both sides of the outer shell of the linkage shell are respectively fixedly connected with the two ends of the saddle shell, and its outer shell, bottom shell, the two ends of the saddle shell and the saddle body of the original saddle part cooperate to form a pouring space for pouring the post-cast concrete layer. The present invention can realize that when replacing the main cable, there is no need to establish a temporary main cable and a temporary support system for the main beam, and there is no need to specially customize the original saddle, reducing the construction difficulty and construction cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge construction, and particularly relates to a saddle system for replacing the main cable of a suspension bridge. Background Art

[0002] The service life of a suspension bridge depends on the structure of the suspension bridge, such as the main cable, suspenders, main tower, saddle, anchor, stiffening girder, and bridge deck system, etc. Among the above structures, the main tower, saddle, and anchor are permanent structures, and the probability of damage during the service period of the bridge is relatively small; the suspenders, bridge deck, and stiffening girder are all replaceable components, and successful replacement cases are very common. Therefore, to a certain extent, the service life of the main cable directly determines the overall service life of the suspension bridge. As the main load-bearing component of the suspension bridge, it plays a role in supporting the beam body and bridge deck load. When the anti-corrosion is not in place or it is eroded by the environment for a long time, the steel wires inside the main cable are prone to cracks or even rust breakage.

[0003] In the prior art, when replacing the main cable, it is mostly necessary to establish a temporary main cable and a temporary support system for the main girder, and it is also necessary to specially customize the original saddle, resulting in complex construction and high construction costs. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a saddle system for replacing the main cable of a suspension bridge, which can realize that when replacing the main cable, there is no need to establish a temporary main cable and a temporary support system for the main girder, and there is no need to specially customize the original saddle, reducing the construction difficulty and construction cost.

[0005] To achieve the above object, the present invention provides a saddle system for replacing the main cable of a suspension bridge, including:

[0006] An original saddle part, arranged on the tower body of the bridge tower;

[0007] A straddle part, including a pair of linkage shells. The original saddle part is located between the pair of linkage shells, and the two linkage shells are connected. One side of the linkage shell close to the original saddle part cooperates with the outer wall of the original saddle part to form a pouring space, and a post-cast concrete layer is poured in the pouring space;

[0008] A new saddle part, straddling above the original saddle part and used for installing a new main cable. The base anchor of the new saddle part is pre-buried in the post-cast concrete layer.

[0009] Furthermore, the linkage shell includes an outer shell, the outer shell is arranged corresponding to the saddle body of the original saddle part, the bottom end of the outer shell is fixedly connected with a bottom shell, and both sides of the outer shell are respectively fixedly connected with saddle end shells. The outer shell, the bottom shell, the saddle end shells, and the saddle body of the original saddle part cooperate to form a pouring space for pouring the post-cast concrete layer.

[0010] Furthermore, a slidable base is fixedly connected to the bottom end of the bottom shell, and the slidable base includes an outer leg and an inner leg, the outer leg is located on the side of the inner leg away from the original cable saddle, and can slide along the bridge direction under the outer leg, and the inner leg is fixedly connected to the base of the original cable saddle.

[0011] Furthermore, a plurality of internal reinforcing ribs are fixedly connected to a side of the outer shell close to the original cable saddle portion.

[0012] Furthermore, two groups of riding rod groups are provided on the two outer shells, the original cable saddle and the new cable saddle are located between the two riding rod groups, the riding rod group includes at least one riding rod, and the two outer shells are connected by the riding rod.

[0013] Furthermore, a plurality of new cable saddle anchor bolts are pre-embedded and fixed in the post-cast concrete layer, and a new cable saddle base of the new cable saddle portion is fixedly connected to the top of the new cable saddle anchor bolts;

[0014] A clamping groove is provided at the bottom end of the saddle body of the new cable saddle, and the clamping groove is embedded and clamped with the top end of the saddle body of the original cable saddle.

[0015] Furthermore, it also includes a bridge tower reinforcement frame, the top of the bridge tower reinforcement frame is a bridge tower top surface fixing plate arranged on the top of the bridge tower body, the bridge tower top surface fixing plate is sleeved on the outside of the saddle body of the original cable saddle, and the bridge tower top surface fixing plate is fixedly connected to the bridge tower body by an outer ring anchor bolt.

[0016] Furthermore, the four side walls of the bridge tower top surface fixing plate are respectively penetrated with a plurality of long lifting bolts, the four side walls of the bridge tower body are respectively provided with bridge tower hoop plates, the bridge tower top surface fixing plate is fixedly connected to the bridge tower hoop plates by the long lifting bolts, and two adjacent bridge tower hoop plates are fixedly connected by tightening long bolts.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects:

[0018] 1. When replacing the main cable of an existing suspension bridge, the existing conventional cable saddle can be used as the basis, and only the existing cable saddle is modified. There is no need to establish a temporary main cable and a temporary support system for the main beam during replacement. The construction is convenient and the cost is relatively low.

[0019] 2. When replacing the main cable of a suspension bridge, there is no need to specially customize the original cable saddle, and it can be applied to the replacement of the main cable of the currently built suspension bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 is a perspective view of the saddle system;

[0022] Figure 2 is a perspective view of the original saddle part;

[0023] Figure 3 is a perspective view of the connection relationship between the pylon reinforcement frame and the pylon body;

[0024] Figure 4 is a perspective view of the positional relationship between two linkage shells;

[0025] Figure 5 is a perspective view of the new saddle part;

[0026] Among them, 1. original saddle part; 2. pylon top fixing plate; 3. outer ring anchoring bolt; 4. pylon body; 5. long bolt hole for suspending and fixing the pylon top fixing plate; 6. pylon hoop plate; 7. long bolt hole for suspending and fixing the pylon hoop plate; 8. long bolt hole for fastening the pylon hoop plate; 9. linkage shell; 10. straddle tie rod; 11. slidable base; 12. outer side leg; 13. inner side leg; 14. outer shell; 15. internal stiffening rib; 16. bottom shell; 17. saddle end shells; 18. post-cast concrete layer; 19. new saddle anchoring bolt; 20. new saddle base; 21. new saddle part; 22. card slot. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0028] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0029] Referring to Figures 1 - 5 , the present invention provides a saddle system for replacing the main cable of a suspension bridge, including: an original saddle part 1, which is arranged on the pylon body 4. Both the pylon body 4 and the original saddle part 1 are conventional bridge settings.

[0030] The straddle part includes a pair of linkage shells 9. The original saddle part 1 is located between the pair of linkage shells 9. The two linkage shells 9 are connected. On the side of the linkage shell 9 close to the original saddle part 1, it cooperates with the outer wall of the original saddle part 1 to form a pouring space, and a post-cast concrete layer 18 is poured in the pouring space. On the one hand, the linkage shell 9 can support and reinforce the original saddle part 1. On the other hand, the linkage shell 9 can be used as an outer pouring formwork, that is, the outer wall of the saddle body of the original saddle part 1 and the inner wall of the linkage shell 9 cooperate to form a closed space for pouring. After the linkage shell 9 is installed, concrete is poured into this closed space to form the post-cast concrete layer 18. The post-cast concrete layer 18 can support the new saddle part 21, and at the same time, together with the straddle tie rod 10, connect and fix the saddle body of the original saddle part 1 and the linkage shell 9.

[0031] The new saddle part 21 straddles above the original saddle part 1 and is used for installing the new main cable. The base anchor of the new saddle part 21 is pre-buried in the post-cast concrete layer 18. The new saddle part 21 is fixed at the top of the post-cast concrete layer 18 and at the same time straddles the top of the original saddle part 1. A card slot 22 matching the top end of the saddle body of the original saddle part 1 is provided at the bottom end of the saddle body of the new saddle part 21 for realizing the clamping and fixing of the saddle body of the new saddle part 21 and the saddle body of the original saddle part 1.

[0032] For a further optimized solution, refer to Figure 1 、 Figure 2 、 Figure 4 The linkage shell 9 includes an outer shell 14. The outer shell 14 is arranged corresponding to the saddle body of the original saddle part 1. The outer shell 14 is inclined, that is, the top end of the outer shell 14 is close to the saddle body of the original saddle part 1, and the bottom end of the outer shell 14 is far from the saddle body of the original saddle part 1, so that the post-cast concrete layer 18 has a structure with a larger bottom area than the top area. The bottom shell 16 is fixedly connected to the bottom end of the outer shell 14, and the two ends of the saddle shell 17 are fixedly connected to both sides of the outer shell 14 respectively. The outer shell 14, the bottom shell 16, the two ends of the saddle shell 17 and the saddle body of the original saddle part 1 cooperate to form a pouring space for pouring the post-cast concrete layer 18.

[0033] It can be understood that because the outer shell 14 is inclined, a structure with enclosures on the bottom end and four side walls can be formed through the cooperation of the outer shell 14, the bottom shell 16, the two ends of the saddle shell 17 and the original saddle part 1, and the post-cast concrete layer 18 is formed by grouting into this enclosure structure.

[0034] Among them, the outer shell 14, the bottom shell 16 and the two ends of the saddle shell 17 are all made of steel structure.

[0035] For a further optimized solution, refer to Figure 4, a slidable base 11 is fixedly connected to the bottom end of the bottom shell 16. The slidable base 11 includes outer legs 12 and inner legs 13. The outer legs 12 are located on the side of the inner legs 13 away from the original saddle part 1. The outer legs 12 are in contact with the top end of the bridge tower reinforcement frame, and can slide longitudinally along the bridge direction under the outer legs. The inner legs 13 are fixedly connected to the base of the original saddle part 1.

[0036] Among them, the outer legs 12 are used to support the linkage shell 9. A plurality of outer legs 12 are arranged side by side, such as two, three, four, five, etc. The actual number of outer legs 12 is determined according to the actual support requirements, and can slide longitudinally along the bridge direction under the outer legs 12.

[0037] For a further optimized solution, refer to Figure 4 , a number of internal stiffening ribs 15 are fixedly connected to the side of the outer shell 14 close to the original saddle part 1.

[0038] The internal stiffening ribs 15 are used to improve the strength of the outer shell 14. At the same time, the presence of the internal stiffening ribs 15 can increase the contact area between the outer shell 14 and the post-cast concrete layer 18.

[0039] Furthermore, the height of the saddle end shells 17 is preferably higher than the highest stiffening rib on the outside of the original saddle part 1, and at the same time, the top surface of the post-cast concrete layer 18 is a flat surface.

[0040] For a further optimized solution, refer to Figure 4 , two groups of straddle part tie rod groups are arranged through the two outer shells 14. The original saddle part 1 and the new saddle part 21 are located between the two straddle part tie rod groups. The straddle part tie rod group includes at least one straddle tie rod 10, and the two outer shells 14 are connected by the straddle tie rod 10.

[0041] Before the post-cast concrete layer 18 is poured, the two outer shells 14 are connected and fastened by the straddle tie rod 10.

[0042] Specifically, the two linkage shells 9 can slide relative to the bridge tower top surface fixing plate 2; the bottom shell 16 is fixedly connected to the base of the original saddle part 1 through the inner legs 13.

[0043] For a further optimized solution, refer to Figure 1 、 Figure 4 、 Figure 5 , a number of new saddle anchoring bolts 19 are pre-embedded and fixed in the post-cast concrete layer 18. The new saddle base 20 of the new saddle part 21 is fixedly connected to the top end of the new saddle anchoring bolt 19. Before the post-cast concrete layer 18 is poured, the new saddle anchoring bolts 19 are pre-anchored in the area to be poured. After the construction is completed, concrete is poured, and at the same time, the top ends of the new saddle anchoring bolts 19 are exposed, and the new saddle base 20 is fixed on the new saddle anchoring bolts 19.

[0044] The bottom end of the saddle body of the new saddle part 21 is provided with a clamping groove 22, and the clamping groove 22 is embedded and clamped with the top end of the saddle body of the original saddle part 1. The clamping groove 22 should be adaptively clamped with the top end of the saddle body of the original saddle part 1.

[0045] For a further optimized solution, referring to Figure 3 , it further includes a bridge tower reinforcement frame. The top end of the bridge tower reinforcement frame is a bridge tower top surface fixing plate 2 arranged at the top end of the bridge tower body 4. The bridge tower top surface fixing plate 2 is sleeved outside the saddle body of the original saddle part 1, and the bridge tower top surface fixing plate 2 is fixedly connected to the bridge tower body 4 through an outer ring anchoring bolt 3.

[0046] By sleeving and fixing the bridge tower reinforcement frame outside the original bridge tower body 4, on the one hand, the original bridge tower body 4 is reinforced, and on the other hand, a supporting platform is provided for the straddle part. The top end of the bridge tower reinforcement frame surrounds the outside of the original saddle part 1, and the bridge tower reinforcement frame does not affect the normal existence of the original saddle part 1.

[0047] It can be understood that the bridge tower top surface fixing plate 2 is fixed to the top end of the bridge tower body 4 through the outer ring anchoring bolt 3.

[0048] For a further optimized solution, referring to Figure 1 、 Figure 3 , a number of hanging and fixing long bolts are respectively penetrated through the four side walls of the bridge tower top surface fixing plate 2, and bridge tower hoop plates 6 are respectively arranged on the four side walls of the bridge tower body 4. The bridge tower top surface fixing plate 2 is fixedly connected to the bridge tower hoop plates 6 through the hanging and fixing long bolts, and the adjacent two bridge tower hoop plates 6 are fixedly connected through fastening long bolts.

[0049] Specifically, a number of bridge tower top surface fixing plate hanging and fixing long bolt holes 5 are opened on the bridge tower top surface fixing plate 2, and bridge tower hoop plate hanging and fixing long bolt holes 7 are opened at the corresponding positions of the top ends of the bridge tower hoop plates 6. The bridge tower top surface fixing plate hanging and fixing long bolt holes 5 and the bridge tower hoop plate hanging and fixing long bolt holes 7 are used for the hanging and fixing long bolts to pass through to realize the fixed connection between the bridge tower top surface fixing plate 2 and the bridge tower hoop plates.

[0050] Specifically, bridge tower hoop plate fastening long bolt holes 8 are opened on the side walls of the bridge tower hoop plates 6, and the bridge tower hoop plate fastening long bolt holes 8 on the adjacent two bridge tower hoop plates 6 correspond to each other and are penetrated by fastening long bolts to realize the fixation of the adjacent two bridge tower hoop plates 6.

[0051] Furthermore, the bridge tower top surface fixing plate hanging and fixing long bolt holes 5, the bridge tower hoop plate hanging and fixing long bolt holes 7, and the bridge tower hoop plate fastening long bolt holes 8 are preferably long bolt holes, which are convenient for fastening and adjustment.

[0052] Specifically, the construction sequence is as follows:

[0053] 1. First construct or there is already the original saddle part 1, and then drive the outer ring anchoring bolts 3 into the bridge tower body 4.

[0054] 2. Bolt the top fixing plate 2 of the bridge tower to the outer ring anchor bolts 3, then suspend the bridge tower hoop plate 6 around the bridge tower body 4 by passing through the hoisting fixing long bolt holes 5 of the top fixing plate of the bridge tower and the hoisting fixing long bolt holes 7 of the bridge tower hoop plate, and then connect the bridge tower hoop plate 6 through the fastening long bolt holes 8 of the bridge tower hoop plate and surround the bridge tower body 4.

[0055] 3. Fix the inner leg 13 to the base of the original cable saddle part 1, and place the outer leg 12 on the top surface of the top fixing plate 2 of the bridge tower.

[0056] 4. Assemble the linkage housing 9 at the predetermined position, pass the straddle tie rod 10 through the prefabricated holes of the linkage housing 9 to pull the two sides of the linkage housing 9, and then embed the new cable saddle anchor bolts 19 and pour the post-cast concrete layer 18.

[0057] 5. After the post-cast concrete layer 18 hardens, fix the new cable saddle base 20 to the embedded new cable saddle anchor bolts 19.

[0058] 6. Hang the new main cable and release and remove the old main cable.

[0059] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A saddle system for replacing the main cable of a suspension bridge, characterized in that: Comprising: The original saddle part (1) is arranged on the bridge tower body (4); the straddle part includes a pair of linkage shells (9), the original saddle part (1) is located between the pair of linkage shells (9), the two linkage shells (9) are connected, and one side of the linkage shell (9) close to the original saddle part (1) cooperates with the outer wall of the original saddle part (1) to form a casting space, and a post-cast concrete layer (18) is cast in the casting space; a new saddle part (21) straddles above the original saddle part (1) and is used for installing a new main cable, and the base anchor bolts of the new saddle part (21) are pre-buried in the post-cast concrete layer (18); The linkage shell (9) includes an outer shell (14), the outer shell (14) is arranged corresponding to the saddle body position of the original saddle part (1), the bottom end of the outer shell (14) is fixedly connected with a bottom shell (16), and both sides of the outer shell (14) are respectively fixedly connected with saddle end shells (17). The outer shell (14), the bottom shell (16), the saddle end shells (17), and the saddle body of the original saddle part (1) cooperate to form a casting space for casting the post-cast concrete layer (18); The bottom end of the bottom shell (16) is fixedly connected with a slidable base (11), the slidable base (11) includes an outer leg (12) and an inner leg (13), the outer leg (12) is located on the side of the inner leg (13) away from the original saddle part (1), and the outer leg (12) can slide longitudinally along the bridge, and the inner leg (13) is fixedly connected with the base of the original saddle part (1); A plurality of internal stiffening ribs (15) are fixedly connected to one side of the outer shell (14) close to the original saddle part (1); Two groups of straddle part tie rod groups are arranged on the two outer shells (14), the original saddle part (1) and the new saddle part (21) are located between the two straddle part tie rod groups, the straddle part tie rod group includes at least one straddle tie rod (10), and the two outer shells (14) are connected through the straddle tie rod (10).

2. The saddle system for replacing the main cable of a suspension bridge according to claim 1, characterized in that: A plurality of new saddle anchoring bolts (19) are pre-buried and fixed in the post-cast concrete layer (18), and the new saddle base (20) of the new saddle part (21) is fixedly connected with the top ends of the new saddle anchoring bolts (19); a clamping groove (22) is formed at the bottom end of the saddle body of the new saddle part (21), and the clamping groove (22) is embedded and clamped with the top end of the saddle body of the original saddle part (1).

3. The saddle system for replacing the main cable of a suspension bridge according to claim 1, wherein: It further includes a bridge tower reinforcement frame. The top end of the bridge tower reinforcement frame is a bridge tower top surface fixing plate (2) arranged at the top end of the bridge tower body (4). The bridge tower top surface fixing plate (2) is sleeved outside the saddle body of the original saddle part (1), and the bridge tower top surface fixing plate (2) is fixedly connected with the bridge tower body (4) through an outer ring anchoring bolt (3).

4. The saddles system for replacing the main cable of a suspension bridge according to claim 3, characterized in that: A plurality of hanging and fixing long bolts are respectively arranged on the four side walls of the bridge tower top surface fixing plate (2), bridge tower hoop plates (6) are respectively arranged on the four side walls of the bridge tower body (4), the bridge tower top surface fixing plate (2) is fixedly connected with the bridge tower hoop plates (6) through the hanging and fixing long bolts, and adjacent two bridge tower hoop plates (6) are fixedly connected through fastening long bolts.

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