Column foundation support structure for additionally arranging contact net on existing bridge pier of rail transit elevated

Abstract

The utility model relates to the field of electrified transformation of existing rail transit, in particular to a rail transit elevated existing pier additionally-arranged contact net stand column foundation support structure which comprises a truss structure composed of two main trusses, and the two main trusses are connected through a transverse reinforcing structure to form an integral structure. A connecting plate is arranged at the end part of the inner side of an upper-layer truss of the truss structure, the connecting plate is fixedly connected with the pier cap or the cover beam through a chemical anchor bolt, a connecting plate is arranged at the end part of the inner side of a lower-layer truss of the truss structure, and the connecting plate is fixedly connected with the pier through a chemical anchor bolt. The truss has the advantages of being suitable for bridge pier structures of different sizes, wide in application range, high in overall stability, capable of effectively improving safety and durability of connection of the foundation support and the bridge piers, capable of providing a new structural form for electrification transformation engineering of existing similar rail transit, and good in application prospect implementation.

Description

Technical Field

[0001] The utility model relates to the field of electrification transformation of existing rail transit, and in particular to a foundation support structure for adding contact network columns to existing bridge piers of elevated rail transit. Background Art

[0002] With the rapid growth of urban scale, population density, and economic development, rail transit passenger volume is also increasing accordingly. Earlier-constructed rail transit systems, facing insufficient capacity and design flaws, are now undergoing gradual renovations. This includes the modification of elevated sections of the catenary anchor section joints and electrical segments, which has led to the addition of new catenary columns. Due to the limited space and strict urban land use regulations for urban rail transit elevated bridges, the renovation conditions and requirements are relatively stringent, requiring the installation of catenary steel columns on bridge piers. This typically involves upgrading non-electrified railways to electrified railways by installing catenary on bridge piers. However, this method has the disadvantage of using chemical anchor bolts to connect the catenary foundation supports to the bridge piers, which makes the durability of the connection uncertain and difficult to repair and reinforce.

[0003] The pier structure of rail transit bridges is generally a single-column pier or a π-shaped pier. The side of the pier is laterally far away from the edge of the beam, the cantilever length of the bracket is large, the pier structure is slender, and the number of anchor bolts that can be implanted is limited. Adding a solid contact network steel column bracket foundation on the pier has become an urgent problem that needs to be solved. Summary of the Invention

[0004] The purpose of this utility model is to provide a basic support structure for adding contact network columns to existing piers of rail transit elevated roads based on the shortcomings of the above-mentioned existing technologies. By optimizing the connection form between the support structure and the piers, the support structure that has been promoted and used in railway electrification reconstruction is improved and designed to form a new contact network support structure that can meet the needs of adding contact networks to rail transit elevated roads and ensure the durability and safety of the basic support.

[0005] The purpose of this utility model is achieved by the following technical solutions:

[0006] A foundation support structure for adding a catenary column to an existing pier of a rail transit elevated bridge is provided, and is used to add a foundation support structure for a catenary column to the outside of the existing pier. A pier cap or cap beam is provided above the pier, and is characterized in that it comprises a truss structure composed of two main trusses, and the two main trusses are connected by a transverse reinforcement structure to form an integral structure.

[0007] The inner end of the upper truss of the truss structure is provided with a connecting plate, and the connecting plate is fixedly connected to the pier cap or the cap beam through a chemical anchor bolt. The inner end of the lower truss of the truss structure is provided with a connecting plate, and the connecting plate is fixedly connected to the bridge pier through a chemical anchor bolt.

[0008] A hoop steel plate is provided at the middle position of the connecting plate at the inner end of the upper truss. The hoop steel plate is installed around the pier cap or the cap beam, and the hoop steel plate is fixedly connected to the pier cap or the cap beam through chemical anchor bolts.

[0009] The main truss includes an upper chord, a lower chord, a plurality of straight webs and a plurality of diagonal webs, wherein the upper and lower ends of the straight webs are respectively connected to the upper chord and the lower chord and are arranged vertically, and the diagonal webs are arranged between the upper chord and the lower chord and are arranged obliquely.

[0010] The protruding end of at least one of the plurality of diagonal web members is provided with a connecting plate, and the connecting plate is fixedly connected to the pier cap or the cap beam via a chemical anchor bolt.

[0011] The straight web members and the diagonal web members are welded via a rod connecting plate.

[0012] The transverse reinforcement structure includes a reinforcing rod and a reinforcing diagonal rod, and the reinforcing rod and the reinforcing diagonal rod are welded to form a cross reinforcing rod member through a fixing plate, and the cross reinforcing rod member is connected between the two main trusses.

[0013] The transverse reinforcement structure includes a connecting rod arranged between two of the main trusses.

[0014] Advantages of this utility model:

[0015] 1) The structure of the overhead contact network foundation support is optimized for traditional electrified railway bridge piers. By adjusting the circumference of the clamp, the length and angle of the upper and lower chords and web members, it can be adapted to bridge pier structures of different sizes, with a wide range of applications;

[0016] 2) Improve the overall stability of the truss by setting cross reinforcement rods and fixing plates;

[0017] 3) The support structure is fixed to the bridge pier (cap beam) by installing hoop steel plates, and connecting plates are installed at multiple locations and chemical anchor bolts are implanted to effectively improve the safety and durability of the connection between the foundation support and the bridge pier;

[0018] 4) It provides a new structural form for the electrification renovation projects of similar existing rail transit, and has good application prospects and feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0020] Figure 2 This is a side view of the contact network column foundation bracket and bridge pier in the utility model;

[0021] Figure 3This is a top view of the upper truss structure of the contact network column foundation support in the utility model;

[0022] Figure 4 This is a top view of the lower truss structure of the contact network column foundation bracket in the utility model. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0024] like Figure 1-4 As shown in the figure, numbers 1-15 respectively represent: bridge pier 1, chemical anchor bolt 2, hoop steel plate 3, connecting plate 4, connecting plate 5, rod connecting plate 6, upper chord 7, lower chord 8, straight web member 9, diagonal web member 10, connecting rod 11, bridge steel column connecting flange 12, fixing plate 13, reinforcing rod 14, and reinforcing diagonal rod 15.

[0025] Example: Figures 1 to 4 As shown, the basic support structure for adding a contact network column to an existing bridge pier of a rail transit elevated road in this embodiment is used to add a basic support structure for a contact network column to an existing bridge pier 1. A cap beam or a pier cap is provided above the existing bridge pier 1.

[0026] like Figures 1 to 3 As shown, the foundation support structure in this embodiment includes a bridge pier 1, chemical anchor bolts 2, hoop steel plates 3, connecting plates 4, connecting plates 5, rod connecting plates 6, upper chords 7, lower chords 8, straight webs 9, diagonal webs 10, connecting rods 11, bridge steel column connection flanges 12, fixing plates 13, reinforcing rods 14, and reinforcing diagonal rods 15. All rods are angle steels, and all plates are rectangular plates.

[0027] The upper chord 7, lower chord 8, straight webs 9, and diagonal webs 10 are welded together via a connecting plate 6 to form two main girders, which are connected by a connecting rod 11. Reinforcement rods 14 and diagonal reinforcement rods 15 are welded together via a fixing plate 13 to form a cross-reinforcement member. This cross-reinforcement member laterally reinforces the two main girders, effectively improving their overall stability.

[0028] Combine Figure 1 and Figure 2 As shown, the connecting plate 4 is arranged at the protruding end of the upper chord 7, and a hoop steel plate 3 is arranged in the middle position. The hoop steel plate 3 is installed around the anchor pier cap (cap beam) and is tightly fitted to the pier cap (cap beam) through the chemical anchor bolts 2. The hoop steel plate 3 effectively solves the problem of insufficient durability of the chemical anchor bolts 2 on the connecting plate 4 or the connecting plate 5, and improves the safety and durability of the connection between the foundation support structure and the pier 1.

[0029] like Figure 2As shown, two groups of bridge column connection flanges 12 are provided, each group having two flanges. The upper chord 7, straight web 9, connecting rod 11, and rod connection plate 6 are fixed to the bridge column connection flanges 12. The bridge column connection flanges 12 are used to install the lattice catenary steel frame columns.

[0030] like Figure 1 As shown, the length and angle of the upper and lower chords and the straight and diagonal webs can be adjusted to meet different needs and different pier sizes, thereby improving the applicability of the foundation support structure. At the same time, the location of the cross reinforcement rod can be determined according to the size of the external load.

[0031] like Figures 1 to 4 As shown, connecting plates 5 are attached to the extended ends of the lower chord 8 and a diagonal web member 10. The upper chord 7 and the straight and diagonal web members are welded to connecting plates 4. The dimensions of connecting plates 4 should allow for the installation of hoop steel plates 3. Connecting plates 4 and 5 tightly connect the main truss to the pier, and their angles can be adjusted according to the structural dimensions of the pier and pier cap (cap beam).

[0032] There are 8 chemical anchor bolts 2 on the connecting plate 4 and 4 chemical anchor bolts 2 on the connecting plate 5. The chemical anchor bolts 2 are used to connect the connecting plate and the bridge pier. The specification parameters of the chemical anchor bolts 2 are selected according to the reaction load of the contact network foundation and the post-reinforcement technical specifications.

[0033] Although the above embodiments have described the concepts and embodiments of the present invention in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described here one by one.

Claims

1. A foundation support structure for adding a catenary column to an existing pier of a rail transit elevated bridge, which is used to add a foundation support structure for a catenary column to the outside of the existing pier, wherein a pier cap or cap beam is provided above the pier, and is characterized by: The truss structure comprises two main trusses, wherein the two main trusses are connected by a transverse reinforcement structure to form an integral structure; The inner end of the upper truss of the truss structure is provided with a connecting plate, and the connecting plate is fixedly connected to the pier cap or the cap beam through a chemical anchor bolt. The inner end of the lower truss of the truss structure is provided with a connecting plate, and the connecting plate is fixedly connected to the bridge pier through a chemical anchor bolt.

2. The structure for adding a catenary column foundation support to an existing pier of a rail transit elevated bridge according to claim 1, characterized in that: A hoop steel plate is provided at the middle position of the connecting plate at the inner end of the upper truss. The hoop steel plate is installed around the pier cap or the cap beam, and the hoop steel plate is fixedly connected to the pier cap or the cap beam through chemical anchor bolts.

3. The structure for adding a catenary column foundation support to an existing pier of a rail transit elevated road according to claim 1 is characterized by: The main truss includes an upper chord, a lower chord, a plurality of straight webs and a plurality of diagonal webs, wherein the upper and lower ends of the straight webs are respectively connected to the upper chord and the lower chord and are arranged vertically, and the diagonal webs are arranged between the upper chord and the lower chord and are arranged obliquely.

4. The structure for adding a catenary column foundation support to an existing pier of a rail transit elevated bridge according to claim 3 is characterized by: The protruding end of at least one of the plurality of diagonal web members is provided with a connecting plate, and the connecting plate is fixedly connected to the pier cap or the cap beam via a chemical anchor bolt.

5. The structure for adding a contact network column foundation support to an existing pier of a rail transit elevated bridge according to claim 3 is characterized by: The straight web members and the diagonal web members are welded via a rod connecting plate.

6. The structure for adding a catenary column foundation support to an existing pier of a rail transit elevated bridge according to claim 1 is characterized by: The transverse reinforcement structure includes a reinforcing rod and a reinforcing diagonal rod, and the reinforcing rod and the reinforcing diagonal rod are welded to form a cross reinforcing rod member through a fixing plate, and the cross reinforcing rod member is connected between the two main trusses.

7. The structure for adding a catenary column foundation support to an existing pier of a rail transit elevated bridge according to claim 1 or 6, characterized in that: The transverse reinforcement structure includes a connecting rod arranged between two of the main trusses.

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