Rigid contact net anchor section joint supporting structure supported by single column

Abstract

The invention discloses a rigid catenary anchor section joint supporting structure supported by a single column. The rigid catenary anchor section joint supporting structure comprises a supporting column arranged in the middle of each anchor section joint of a rigid catenary. An integral frame is arranged close to the upper end of the support column; the integral frame comprises an upper cross beam and a lower cross beam which are parallel to the horizontal plane; the upper cross beam and the lower cross beam are symmetrically arranged relative to the supporting column; a plurality of vertical components and inclined rods are arranged between the upper cross beam and the lower cross beam to form a truss structure; pull rods are arranged at positions, close to two ends, of the upper surfaces of the pillars and the upper cross beam; supporting rods are arranged at positions, close to two ends, of the lower surfaces of the supporting columns and the lower cross beam; the upper cross beam is provided with an upper cantilever base; and the lower cross beam is provided with a lower cantilever base. The structure is simple in appearance and structure, the number of components is reduced, the construction efficiency can be effectively improved, the engineering investment is reduced, and the landscape performance of the anchor section joints is improved.

Description

Technical Field

[0001] The invention relates to the technical field of rigid contact network, in particular to a rigid contact network anchor section joint support structure supported by a single column. Background Art

[0002] The rigid contact network is an important part of the power supply system of electrified railways and urban rail transit, and is mainly composed of busbars, contact wires, insulators and supporting structures. Affected by the thermal expansion and contraction of the busbars, the rigid contact network must be divided into anchor sections at intervals so that both ends of the rigid contact network can be freely expanded and contracted. The length of each anchor section is generally 200 to 250 meters.

[0003] Current status of related technologies in this field:

[0004] The rigid contact network has the advantages of simple structure, small occupied headroom, high stability, etc. It is particularly suitable for low headroom tunnels and is widely used in underground sections of urban rail transit. Its anchor section joint is used to achieve mechanical transition and electrical connection between two adjacent anchor sections. It usually consists of two adjacent anchor sections, a total of four suspension positioning points. The positioning points of different anchor sections are staggered along the line direction, with a longitudinal spacing of about 1m. They are positioned and fixed by supporting structures. In underground sections, they are usually directly fixed on the top of the section structure.

[0005] In areas with large terrain undulations, urban rail transit lines usually transition from underground sections to ground sections or elevated sections multiple times. When the ground section or elevated section is short, considering the smoothness requirements of the contact network, in order to achieve the purpose of reducing hard points, rigid contact networks are usually continued to be used instead of transitioning from rigid-flexible to flexible contact networks.

[0006] At present, conventional ground or elevated section rigid contact network anchor joints usually have a set of support structures at each suspension positioning point. The support structure is usually composed of steel pillars, flat wrist arms, support tubes, insulators, busbar positioning clamps, etc., and the spacing along the line direction is about 1m, that is, 4 steel columns and corresponding suspension parts are densely installed at a spacing of 1m at the joint; some optimized joints use 2 pillars to support 2 suspension positions for the up and down directions respectively, and the number of pillars is reduced. The above conventional anchor joint structure has the following disadvantages:

[0007] 1) Considering that the rigid contact network has no tension, the load borne by its supporting structure is only the deadweight of the contact network and wind load. Arranging 4 or 2 steel pillars at each anchor joint is too redundant from the perspective of structural force, which wastes the project investment;

[0008] 2) The suspension positioning points of the uplink and downlink anchor joints are installed on their own independent structures. Due to the difference in structural stiffness and the influence of installation errors, the smoothness of the rigid contact network at the anchor joint is poor, which is prone to produce hard points and has an adverse effect on the bow-net relationship;

[0009] 3) There are many columns, many on-site construction and hoisting processes, and low construction efficiency;

[0010] 4) The locally dense arrangement of columns also has a certain impact on the ground landscape and elevated landscape, and the overall appearance is poor.

[0011] Therefore, with the rapid development of urban rail transit and the increasing requirements for landscaping and economy, how to optimize the joint support structure of the rigid contact network anchor section to make it more economical, safer and more landscaped, and to enable the rigid contact network to be better applied in ground and elevated sections has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0012] In view of the above-mentioned defects of the prior art, the present invention provides a single-column supported rigid contact network anchor section joint support structure, the purpose of which is to make the rigid contact network have better economy, safety and landscape, and to be better applied in ground sections and elevated sections.

[0013] To achieve the above-mentioned purpose, the present invention discloses a single-column-supported rigid contact network anchor segment joint support structure, comprising a pillar arranged at the middle position of each anchor segment joint of the rigid contact network;

[0014] The support pillar is provided with an integral frame near the upper end;

[0015] The overall frame includes an upper beam and a lower beam both arranged parallel to the horizontal plane;

[0016] The upper crossbeam and the lower crossbeam are both fixedly connected to the pillar at the center, and both ends are cantilever structures, that is, they are symmetrically arranged about the pillar;

[0017] A plurality of vertical members and diagonal rods are arranged between the upper crossbeam and the lower crossbeam to form a truss structure;

[0018] The outer side wall of the support column located above the upper cross beam and the upper surface of the upper cross beam near both ends are provided with pull rods;

[0019] The outer side wall of the support below the lower cross beam and the lower surface of the lower cross beam near both ends are provided with support rods;

[0020] The upper crossbeam is provided with an upper arm base at a position corresponding to the contact line;

[0021] The lower cross beam is provided with a lower arm base at a position corresponding to the contact line.

[0022] Preferably, two suspension positioning points are provided at the end of each anchor section joint; the distance between every two adjacent suspension positioning points of each anchor section joint is 1 m; and the four suspension positioning points at each anchor section joint are installed on the same structure.

[0023] Preferably, the distance between the upper cross beam and the lower cross beam is 0.65m to 1.0m.

[0024] Preferably, the distance between every two adjacent vertical members is consistent with the distance between two adjacent suspension positioning points.

[0025] Preferably, the angle between each of the support rods and the pillar is 45°.

[0026] Beneficial effects of the present invention:

[0027] The invention has a concise appearance, a simple structure, and a reduced number of components, and can effectively improve construction efficiency, reduce project investment, and improve the landscape of the anchor section joint.

[0028] Compared with the traditional method, the present invention reduces at most 3 pillars, and the main structural parts are prefabricated and assembled before being hoisted as a whole, which effectively improves the construction efficiency and reduces the project cost.

[0029] The present invention can improve the smoothness of the mechanical transition of the anchor section joint and improve the bow-net relationship at the anchor section joint.

[0030] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of an embodiment of the present invention is shown.

[0032] Figure 2 A schematic structural diagram of a support in an embodiment of the present invention is shown.

[0033] Figure 3 A schematic diagram of the structure after the support and the overall frame are installed in one embodiment of the present invention is shown.

[0034] Figure 4 A schematic diagram of the structure after the pillars, the overall frame, the tie rods and the support rods are installed in one embodiment of the present invention is shown. DETAILED DESCRIPTION

[0035] Example

[0036] like Figures 1 to 4As shown, a single-column-supported rigid contact network anchor segment joint support structure comprises a pillar 1 arranged at the middle position of each anchor segment joint of the rigid contact network;

[0037] An integral frame 2 is provided near the upper end of the support 1;

[0038] The overall frame 2 includes an upper crossbeam 21 and a lower crossbeam 22 both arranged parallel to the horizontal plane;

[0039] The upper crossbeam 21 and the lower crossbeam 22 are both fixedly connected to the pillar 1 at the center, and both ends are cantilever structures, that is, they are symmetrically arranged about the pillar 1;

[0040] A plurality of vertical members 23 and diagonal rods 24 are provided between the upper cross beam 21 and the lower cross beam 22 to form a truss structure;

[0041] The outer wall of the support 1 above the upper cross beam 21 and the upper surface of the upper cross beam 21 near both ends are provided with tie rods 3;

[0042] The outer side wall of the support 1 below the lower cross beam 22 and the lower surface of the lower cross beam 22 near both ends are provided with support rods 4;

[0043] The upper cross beam 21 is provided with an upper arm base at a position corresponding to the contact line;

[0044] The lower cross beam 22 is provided with a lower arm base at a position corresponding to the contact line.

[0045] Since each anchor section of the rigid contact network is provided with two suspension positioning points at its end; in order to realize the mechanical transition between two adjacent anchor sections, the busbars at the end of each anchor section have a certain overlap in the line direction to form an overlapping section; in the overlapping section, the spacing between the four suspension positioning points along the line direction is 1m, and the horizontal spacing between the busbars in the vertical line direction is maintained at more than 300mm to realize the function of the anchor section joint.

[0046] The overall frame 2 is arranged symmetrically relative to the support 1 , with a length of about 2 m on each side, and is composed of an upper crossbeam 21 and a lower crossbeam 22 , a vertical member 23 and an inclined rod 24 .

[0047] The upper cross beam 21 and the lower cross beam 22 are both fixedly connected to the support 1 at the center, and both ends are cantilever structures.

[0048] The upper cross beam 21 is provided with an upper arm base at a position corresponding to the contact line;

[0049] The lower cross beam 22 is provided with a lower arm base at a position corresponding to the contact line, which can provide a reliable node for the flat arm and the support pipe.

[0050] One end of the pull rod 3 is connected to the top of the support 1, and the other end is connected to the cantilever end of the upper beam 21 of the overall frame 2, which plays a pulling role on the cantilever end of the overall frame 2 to control its vertical deformation deflection.

[0051] One end of the support rod 4 is connected to the support column 1, and the other end is connected to the cantilever end of the lower cross beam 22 of the overall frame 2, so as to support the cantilever end of the overall frame 2 and control its vertical deformation deflection.

[0052] In actual application, the present invention is assembled in the factory to form an integral structure and then assembled on site at one time. After the verticality is finely adjusted, the flat wrist arm, the support tube and the busbar positioning clamp are installed.

[0053] In some embodiments, two suspension positioning points are provided at the end of each anchor segment joint; the distance between every two adjacent suspension positioning points of each anchor segment joint is 1m; and the four suspension positioning points at each anchor segment joint are installed on the same structure.

[0054] In some embodiments, the contact line has a height of 4060 mm and the height of the support 1 is 5.8 m.

[0055] In practical applications, the height of the support 1 is determined by combining the height of the contact line, the height of the arm structure, and the height of the pull rod 3.

[0056] In some embodiments, the distance between the upper beam 21 and the lower beam 22 is 0.65 m to 1.0 m.

[0057] In practical applications, the distance between the upper cross beam 21 and the lower cross beam 22 is determined according to the height of the cantilever structure.

[0058] In some embodiments, the distance between every two adjacent vertical members 23 is consistent with the distance between two adjacent suspension anchor points.

[0059] In some embodiments, the angle between each support rod 4 and the support column 1 is 45°.

[0060] The present invention adopts a pillar 1 as the main vertical force-bearing member of the supporting structure. The pillar 1 is arranged in the middle position of the anchor section joint. The four suspension positioning points of two adjacent anchor sections at the joint are evenly distributed on both sides of the pillar 1. The pillar is evenly stressed in the direction along the line.

[0061] Compared with the traditional method, the present invention reduces the number of pillars by up to 3, and the main structural parts are prefabricated and assembled before being hoisted as a whole, which effectively improves the construction efficiency and reduces the project investment;

[0062] An integral frame 2 is installed on the support 1 as a fixing structure for the flat wrist arm and the support tube.

[0063] The vertical members 23 on the overall frame 2 are arranged to correspond to the suspension positions. The four suspension positions of adjacent anchor sections are installed on the overall frame 2 through positioning wire clamps, flat wrist arms, and support tubes to improve the smoothness of the mechanical transition of the anchor section and the bow-net relationship at the anchor section joint.

[0064] A pull rod 3 is arranged at the upper part of the cantilever end of the integral frame 2, and a support rod 4 is arranged at the lower part to control the deflection of the integral frame 2, reduce the height difference between the four suspension positions at the joint, and improve the smoothness of the anchor section joint.

[0065] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A rigid contact network anchor section joint support structure supported by a single column; characterized in that: It comprises a support (1) arranged at the middle position of each anchor section joint of the rigid contact network; An integral frame (2) is provided near the upper end of the support (1); The overall frame (2) comprises an upper crossbeam (21) and a lower crossbeam (22) both of which are arranged parallel to a horizontal plane; The upper crossbeam (21) and the lower crossbeam (22) are both fixedly connected to the support (1) at a central position, and both ends are cantilever structures, that is, they are both symmetrically arranged with respect to the support (1); A plurality of vertical members (23) and diagonal rods (24) are arranged between the upper crossbeam (21) and the lower crossbeam (22) to form a truss structure; Pull rods (3) are provided on the outer wall of the support (1) located above the upper cross beam (21) and on the upper surface of the upper cross beam (21) near both ends; The outer wall of the support (1) below the lower cross beam (22) and the lower surface of the lower cross beam (22) are both provided with support rods (4) near both ends; The upper crossbeam (21) is provided with an upper arm base at a position corresponding to the contact line; The lower cross beam (22) is provided with a lower arm base at a position corresponding to the contact line.

2. The rigid contact network anchor segment joint support structure supported by a single column according to claim 1 is characterized in that: Two suspension positioning points are provided at the end of each anchor section joint; the distance between every two adjacent suspension positioning points of each anchor section joint is 1m; and the four suspension positioning points at each anchor section joint are installed on the same structure.

3. The rigid contact network anchor segment joint support structure supported by a single column according to claim 1 is characterized in that: The distance between the upper crossbeam (21) and the lower crossbeam (22) is 0.65m to 1.0m.

4. The rigid contact network anchor segment joint support structure supported by a single column according to claim 1 is characterized in that: The distance between every two adjacent vertical members (23) is consistent with the distance between two adjacent suspension positioning points.

5. The rigid contact network anchor segment joint support structure supported by a single column according to claim 1 is characterized in that: The included angle between each of the support rods (4) and the pillar (1) is 45°.

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