WO2020186806A1

WO2020186806A1 - Urban rail traffic prefabricated assembly o-shaped beam and overpass comprising urban rail traffic prefabricated assembly o-shaped beam

Info

Publication number: WO2020186806A1
Application number: PCT/CN2019/120384
Authority: WO
Inventors: 路林海; 刘家海; 王树栋
Original assignee: 济南轨道交通集团有限公司
Priority date: 2019-03-20
Filing date: 2019-11-22
Publication date: 2020-09-24
Also published as: CN109868714A

Abstract

Disclosed are an urban rail traffic prefabricated assembly O-shaped beam and an overpass comprising the urban rail traffic prefabricated assembly O-shaped beam. The urban rail traffic prefabricated assembly O-shaped beam comprises a beam body. The beam body comprises a prefabricated bottom board, a web and an upper cover board. The bottom board, the web and the upper cover board are connected together to form a channel having an O-shaped cross section. Multiple rail bearing platforms are provided at the top of the bottom board in the length direction of the bottom board. Multiple cable supporting bodies are provided on the inner side of the web in the length direction and the height direction of the web. The upper cover board is provided with lighting windows, a preserved hole used for device and material transportation during a construction and operation period, and a power supply apparatus.

Description

Urban rail transit prefabricated assembled O-shaped beam and elevated bridge including the beam

Technical field

The invention relates to an elevated bridge span structure for supporting tracks, in particular to a prefabricated assembled O-beam used in an elevated section of urban rail transit and an elevated bridge including the beam.

Background technique

The inventor discovered the currently known urban rail transit elevated section bridges, such as a Chinese patent application with the publication number CN101353881A and the name "U-shaped beam for urban rail transit", the publication number CN102286915A and the name "Continuous basin beam for urban rail transit" It is necessary to install sound insulation barriers when passing through noise-sensitive areas such as hospitals, schools, and residences. In addition, existing rail transit elevated section bridges generally need to be installed with catenary columns to erect power supply devices. These all lead to an increase in the height of the beam section and affect the urban landscape. Aesthetics has caused a certain degree of space waste and visual pollution, and has also brought some safety problems, such as rusting, falling, and overturning of the catenary column due to the effects of train vibration, wind load, rain washing and other effects. These problems restrict the choice of line laying methods for urban rail transit projects.

Summary of the invention

The purpose of the present invention is to provide a prefabricated assembled O-beam for urban rail transit and an elevated bridge spanning structure including the beam in view of the limitations of the existing technology, so as to solve the problem of the existing structure affecting the urban landscape aesthetics and space waste, and to solve the safety problem Problems and increased engineering costs.

The first objective of the present invention is to provide a prefabricated assembled O-beam for urban rail transit. To achieve the above objective, the present invention adopts the following technical solutions:

A prefabricated assembled O-beam for urban rail transit, comprising a beam body. The beam body includes a prefabricated bottom plate, a web and an upper cover plate, and the bottom plate, web and upper cover plate are connected together to form a cross-sectional shape It is an O-shaped channel with a power supply device on the beam; along the length of the bottom plate, there are multiple rail platforms on the top; along the length and height of the web, there are A plurality of cable supports are arranged on the inner side; and the upper cover plate is provided with daylighting windows and reserved holes for the transportation of equipment and materials during construction and operation.

The above-mentioned assembled O-beam integrates functions such as load bearing, noise reduction, wind reduction, decoration and operation. The system is efficiently integrated. The web and the upper cover plate are not only used as stress members, but also serve as power supply cable supports and communications. The signal cable support body, the carrier of the power supply device and the sound insulation barrier eliminate the need for sound insulation barriers and catenary pillars installed in the existing rail transit viaducts, and there are no exposed overhead catenary cables, and at the same time reduce the wind resistance of vehicle operation and improve It also saves space, reduces visual pollution, and improves urban landscape aesthetics. In addition, the fully enclosed space greatly reduces the impact of rail transit on the surrounding noise, which can relieve the problem of restricting the selection of rail transit projects.

As a further technical solution, for the double-line O-beam, the bottom plate and web are integrally prefabricated as part of the structure, the upper cover plate is prefabricated to form the other part of the structure, and the two-part structure is assembled on site and connected by prestressed beams. Structure as a whole.

As a further technical solution, for a single-line O-beam, the bottom plate, web and upper cover plate are prefabricated as a whole.

As a further technical solution, a hole is reserved on the top of each beam. This reserved hole is a transportation channel for equipment and materials during construction and operation. During operation, the hole is blocked by light-transmitting materials and serves as a daylighting window.

As a further technical solution, the daylighting windows are located on both sides of the upper cover.

As a further technical solution, the power supply device is a catenary power supply device, and the catenary power supply device is fixed on the upper cover plate.

As a further technical solution, the power supply device is a three-rail power supply device, and the three-rail power supply device is fixed on the beam bottom plate.

As a further technical solution, the supporting body includes a power cable supporting body, a communication and signal cable supporting body.

As a further technical solution, a platform is provided at the intersection of the upper edge of the web and the upper cover, which serves as an emergency evacuation platform and a maintenance channel.

Furthermore, the track supporting platform and the O-beam bottom plate are integrally prefabricated to become a part of the structural force.

The present invention also provides an elevated bridge comprising a plurality of the above-mentioned prefabricated assembled O-shaped beams, the plurality of prefabricated assembled O-shaped beams are arranged in sequence along the train running direction, and the two ends of each prefabricated assembled O-shaped beam are respectively fixed on the bridge piers Above, adjacent ends of adjacent prefabricated assembled O-beams are fixed on the same pier to form an elevated bridge.

Compared with the prior art, the advantages and positive effects of the present invention are:

The invention is a structural form that integrates functions such as load bearing, noise reduction, wind reduction, decoration and operation. The system is efficiently integrated. The web and the upper cover are not only used as force members, but also serve as power supply cable supports and communication signal cables. The support body, the carrier of the power supply device and the sound insulation barrier eliminate the need for the sound insulation barrier and catenary pillars of the existing rail transit viaducts, and there is no exposed overhead catenary wire, while reducing the wind resistance of vehicle operation and improving the operation It also saves space, reduces visual pollution, and improves urban landscape aesthetics. In addition, the fully enclosed space greatly reduces the noise impact of rail transit on the surrounding area, which can relieve the problem of restricting the choice of rail transit projects.

The beam body of the present invention does not have the risk of rusting, falling of the sound insulation barrier of the existing bridge span structure, and the overturning of the catenary column. At the same time, it has good sealing properties, can reduce the wind resistance of train operation, improve safety, and make the auxiliary structure reach the main structure Service life, low maintenance cost in later period, good comprehensive economy, and great application and promotion prospects.

Description of the drawings

The drawings of the specification forming a part of the application are used to provide a further understanding of the application, and the exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application.

Figure 1 is a schematic side view of a beam of the present invention.

Figure 2 is a schematic top view of the beam of the present invention.

Fig. 3 is a schematic diagram of the cross-sectional structure of A-A in Fig. 1.

Fig. 4 is a schematic diagram of the cross-sectional structure of B-B in Fig. 1.

Fig. 5 is a schematic diagram of the cross-sectional structure of C-C in Fig. 1.

Fig. 6 is a schematic cross-sectional view of the dual-line implementation of the present invention.

Fig. 7 is a schematic cross-sectional view of a single line of the present invention.

Fig. 8 is a schematic diagram of Embodiment 3 of the present invention.

Fig. 9 is a schematic diagram of the fourth embodiment of the present invention.

Reference signs: 1-support base plate, 2-web, 3-cover plate, 4-rail platform, 5-daylighting window, 6-power supply cable support and communication signal cable support, 7-reserved hole, 8 -Train, 9-contact power supply device, 10-support, 11-prestressed beam, 12-three-track power supply device.

detailed description

It should be pointed out that the following detailed descriptions are all illustrative and are intended to provide further explanations for the application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

It should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and/or "including" are used in this specification, they indicate There are features, steps, operations, devices, components, and/or combinations thereof;

For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only mean that they are consistent with the up, down, left, and right directions of the drawings themselves, and do not limit the structure. It is for the convenience of describing the present invention and simplifying the description, 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 of the present invention.

Term explanation part: The terms "installed", "connected", "connected", "fixed" and other terms in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a whole; It can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, an internal connection between two components, or an interaction relationship between two components. For those of ordinary skill in the art The specific meaning of the above terms in the present invention can be understood according to the specific situation.

As described in the background art, existing beams need to be installed with sound insulation barriers when passing through noise-sensitive areas such as hospitals, schools, and residences. In addition, existing rail transit elevated section bridges generally need to be equipped with catenary columns to erect power supply devices. This leads to an increase in the height of the beam section, which affects the aesthetics of the urban landscape, causes a certain degree of space waste and visual pollution, and also brings some safety problems, such as the corrosion of the sound insulation barrier column due to the effects of train vibration, wind load, and rain erosion. The fall and the overturning of the catenary column virtually increase the project cost. These problems restrict the choice of line laying methods for urban rail transit projects. In order to solve the above technical problems, this application proposes a prefabricated assembled O-beam for urban rail transit, which includes a beam body, and the beam body includes a prefabricated bottom plate, a web, and an upper cover. It is connected with the upper cover plate to form an O-shaped channel in cross section. Along the length of the bottom plate, a plurality of rail platforms are arranged on the top of the bottom plate; along the length and height of the web, on its inner side A plurality of cable supports are arranged at intervals; the upper cover is provided with daylighting windows, reserved holes for equipment and material transportation during construction and operation, and power supply devices.

Example 1

In a typical implementation of this application, a double-track O-beam is proposed. The overall structure is shown in Figure 6. The urban rail transit prefabricated and assembled O-beam includes prefabricated bottom plates 1, webs 2 and The upper cover plate 3, the bottom plate, the web and the upper cover plate are connected together to form an O-shaped channel in cross section, and a plurality of rail platforms 4 are provided on the top of the bottom plate 1 along the length direction thereof; The upper cover plate is provided with a daylighting window 5, reserved holes 7 for transportation of equipment and materials during construction and operation, and a catenary power supply device 9. For the setting method of the daylighting window 5, refer to Figures 1 and 2, Daylighting windows 5 are provided on the left and right sides of the upper cover plate. The setting method of the reserved hole 7 is also referred to Fig. 2. In Fig. 2, a reserved hole 7 is set at the center of the upper cover plate 3; the reserved hole 7 on the top of the beam body is blocked by light-transmitting material during the track operation , Also serves as a daylighting window. During construction and maintenance, this reserved hole is used as a lifting channel for equipment and materials during construction and operation.

In addition, a support 10 is provided at the bottom of the bottom plate 1, and the support 10 is provided at both ends of the bottom plate for installation on the supporting bridge piers on site.

Further, along the length and height direction of the web, a plurality of cable supports are provided on its inner side, see Figure 6; in the height direction, 5 cable supports are provided on each side of the web, and each cable The support body has a certain extension in the longitudinal direction; the cable support body can be arranged at intervals in the longitudinal direction, that is, a group of cable support bodies are arranged at intervals, or the cable support body can be along the longitudinal direction of the web. The direction extends all the way, and the entire longitudinal direction is set. The specific method can be set according to actual needs; in addition, the number of cable supports is also set according to the number of cables.

Further, the above-mentioned cable support is divided into power cable support, communication and signal cable support.

Further, Figures 3, 4, and 5 are schematic diagrams of the cross-sectional structure at the AA cross-section, BB cross-section, and CC fulcrum positions in Figure 1, where the supporting base plate 1 and the rail platform of the urban rail transit O-beam body 4 Pouring at the same time, the top of the web 2 on both sides is a widened section, and the widened part extends to the inside of the web to form an overhaul platform, which can be used as an emergency evacuation platform during operation.

Furthermore, in this embodiment, the bottom plate 1 and the web 2 are prefabricated at one time to form a whole; the upper cover 3 is prefabricated separately, and the above two parts are connected into a whole through the prestressing beam 11 to form a common force The beam body improves the overall torsional rigidity. One end of the prestressed beam 11 is fixed on the bottom plate 1, and the other end of the prestressed beam 11 is fixed on the top plate. The prestressed beam 11 is arranged along the arc of the top plate and the bottom plate; the prestressed beam 11 includes A plurality of prestressed beams 11 are respectively installed at the connecting ends of the top plate and the bottom plate.

Referring to Fig. 6, two trains 8 travel on the rail platform 4, one train corresponds to two rail platforms 4, and a total of 4 rail platforms are set.

Further, the longitudinally-arranged shapes of the aforementioned bottom plate 1, web 2 and upper cover plate 3 may be linear structures or curvilinear structures, which are specifically arranged according to actual conditions.

Further, the beam in this embodiment is also provided with a power supply device. The power supply device adopts a catenary power supply device 9. The catenary power supply device 9 is arranged on the top of the cover plate 3 to supply power to the train 8. For details, see Fig. 6, the catenary The power supply device 9 can supply power for two trains at the same time.

The double-line O-beam of this embodiment is a structural form that integrates functions such as load bearing, noise reduction, wind reduction, decoration and operation. The system is efficiently integrated. The web and the upper cover are not only used as force members, but also serve as power supply. The cable support body and the communication signal cable support body, the carrier of the power supply device and the sound insulation barrier eliminate the need for the sound insulation barrier and the catenary pillars of the existing rail transit overhead bridges, and there is no exposed overhead catenary wire, and the vehicle is reduced. The wind resistance of the operation improves the efficiency of operation, saves space, reduces visual pollution, and improves the aesthetics of the urban landscape. In addition, the fully enclosed space greatly reduces the impact of rail transit on the surrounding noise, which can eliminate the choice of route laying methods for rail transit projects Constrained problem.

Example 2

The difference between this embodiment and the implementation of the O-beam disclosed in embodiment 1 is that the embodiment discloses a single-line O-beam. The rail-supporting platform 4 includes two, and the two rail-supporting platforms 4 jointly support a train. The platform 4 is set as a single line, and the bottom plate 1, the web 2 and the upper cover plate 3 are integrally precast and poured at one time, refer to FIG. 7.

Example 3

The difference between this embodiment and embodiment 1 lies in the three-rail power supply device 12 provided on the base plate 1. For details, refer to FIG. 8. The rest of the structure is the same as that of embodiment 1. The three-rail power supply device 12 is provided with two, one and three The rail power supply device corresponds to one train, and the two three-rail power supply devices 12 are arranged in the middle positions of the four rail supporting platforms 4.

Example 4

The difference between this embodiment and the second embodiment lies in the three-rail power supply device 12 provided on the base plate 1. For details, refer to FIG. 9. The rest of the structure is the same as that of the second embodiment; the three-rail power supply device 12 is provided with one three-rail power supply The device 12 is arranged on one side of the rail support 4.

Example 5

This embodiment also provides an elevated bridge, which includes the prefabricated assembled O-beams described in any of the embodiments 1-4, a plurality of prefabricated assembled O-beams are arranged in sequence along the train running direction, and each prefabricated assembly The two ends of the O-beam are fixed on the pier respectively, and the adjacent ends of the adjacent prefabricated assembled O-beam are fixed on the same pier to form an elevated bridge; the specific installation method can refer to the existing installation method, here Do not go into details.

The above descriptions are only preferred embodiments of the application, and are not used to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims

A prefabricated assembled O-beam for urban rail transit, which is characterized by comprising a beam body, said beam body including a prefabricated bottom plate, a web and an upper cover, and the bottom, web and upper cover are connected together A channel with an O-shaped cross-sectional shape is formed, and a power supply device is provided on the beam body; along the length of the bottom plate, a plurality of rail platforms are provided on the top of the beam; along the length and height of the web In the direction, a plurality of cable supports are arranged on the inner side thereof; and the upper cover plate is provided with daylighting windows and reserved holes for the transportation of equipment and materials during construction and operation.
The prefabricated assembled O-beam for urban rail transit according to claim 1, wherein for the double-line O-beam, the bottom plate and the web are integrally prefabricated as part of the structure, and the upper cover plate is prefabricated to form a structural part In the other part, the two-part structure is assembled on site and connected by prestressed beams to form a whole structure.
The prefabricated assembled O-beam for urban rail transit according to claim 1, wherein for the single-line O-beam, the bottom plate, web and upper cover plate are directly prefabricated as a whole.
The prefabricated assembled O-beam for urban rail transit according to any one of claims 1 to 3, wherein the reserved hole is blocked by a light-transmitting material during operation and also serves as a daylighting window.
A prefabricated assembled O-beam for urban rail transit according to any one of claims 1 to 3, wherein the daylighting windows are located on both sides of the upper cover.
A prefabricated assembled O-beam for urban rail transit according to any one of claims 1 to 3, wherein the power supply device is a catenary power supply, and the catenary device is fixed on the inner side of the top cover.
The prefabricated assembled O-beam for urban rail transit according to any one of claims 1 to 3, wherein the power supply device is a three-track power supply device, and the three-track power supply device is fixed on the bottom plate of the beam body.
The prefabricated assembled O-beam for urban rail transit according to any one of claims 1 to 3, wherein the supporting body includes a power cable supporting body, a communication and signal cable supporting body.
A prefabricated assembled O-beam for urban rail transit according to any one of claims 1 to 3, wherein an inspection platform is provided at the intersection of the upper edge of the web and the upper cover, which serves as an emergency evacuation platform and an inspection channel ；

In a further step, the rail bearing platform and the O-beam bottom plate are integrally prefabricated to become a part of the structure.
An elevated bridge, characterized in that it comprises a plurality of prefabricated assembled O-beams as claimed in any one of claims 1-9, the plurality of prefabricated assembled O-beams are arranged in sequence along the train running direction, and each prefabricated assembly O The two ends of the profiled beams are respectively fixed on the bridge pier, and the adjacent ends of the adjacent prefabricated assembled O-beams are fixed on the same bridge pier.