A crossbeam and longitudinal beam system for a suspended monorail double-track curved track beam

Abstract

The present invention discloses a longitudinal and transverse beam system for a suspended monorail double-track curved track beam, comprising track beams on both sides, characterized in that a longitudinal beam is provided along the center line between the track beams on both sides, the two ends of the longitudinal beam being connected to columns, the track beams on both sides being suspended on both sides of the columns, and a plurality of transverse beams are provided along the longitudinal direction to connect the longitudinal beam and the track beams on both sides into a whole. The transverse beam may adopt an I-shaped or box-shaped cross section. The cross section of the suspended track beam is a thin-walled steel structure with an open bottom, and the inner cavity is reserved for electromechanical equipment and vehicle travel. No stiffening structure can be provided, so the torsional rigidity is relatively low. The longitudinal and transverse beam system of the present invention can constrain the bending and torsional deformation of the left and right track beams in the curved section, so that the structure is evenly stressed and the deformation is coordinated, thereby greatly reducing the vertical displacement and torsion angle of the track beam, increasing the applicable span of the curved track beam, and improving the smoothness and comfort of the train running in the curved section.

Description

Technical Field

[0001] The invention relates to a longitudinal and transverse beam system for a suspended monorail curved section double-line track beam, belonging to the field of bridge engineering. Background Art

[0002] Suspended monorail systems offer advantages such as high space utilization, minimal land occupation, strong route adaptability, and a short construction period. They are ideal for satisfying the needs of small- to medium-volume urban tourism and commuting. The vehicles are suspended from the bottom of the track beam, which is supported on bridge piers via pins or supports. Single-track bridge piers are L-shaped, while double-track sections generally use Y-shaped piers.

[0003] The track beam of a suspended monorail is a steel box girder with an open bottom. The running wheels, guide wheels, and power supply system are all housed within the beam. To ensure smooth and comfortable train operation, stringent requirements are imposed on beam deformation. Under both static and live train loads, the vertical deflection of the simply supported beam, the vertical angle at the beam ends, and the horizontal angles on both sides of the beam ends must all be controlled within allowable limits.

[0004] Since the track beam is a thin-walled structure with an open bottom, its inner cavity is reserved for electromechanical equipment and vehicle movement, and no stiffening structure can be set up, so the torsional stiffness is relatively small.

[0005] Generally, the economical span of a simply supported beam in a straight section is 25-30m. When located in a curved section, the bending-torsion coupling effect causes the deformation of the track beam to increase significantly compared to a straight beam of the same span, and the applicable span is greatly reduced. The applicable span of the track beam in the curved section is too small, which is very unfavorable for engineering construction. When the line is arranged along a municipal road, the curved section of the line is generally located at the intersection of the ground road. The arrangement of a small-span curved beam will increase the number of bridge piers, and it is necessary to use auxiliary portal piers to cross the ground road, resulting in poor visibility and poor landscape. In addition, an excessive number of bridge piers at the road intersection will limit the layout of underground pipelines or increase the amount of pipeline relocation, increasing the difficulty of construction.

[0006] The present invention provides a longitudinal and transverse beam system for double-track track beams in curved sections, so as to restrain the bending and torsional deformation of the track beams, increase the applicable span of the curved track beams, and improve the smoothness and comfort of train running in curved sections. Summary of the Invention

[0007] The invention provides a longitudinal and transverse beam system for a suspended monorail double-line curved track beam, so as to restrain the bending and torsional deformation of the track beam and increase the applicable span of the track beam.

[0008] To achieve the above object, the technical solution of the present invention is as follows: A longitudinal and transverse beam system for a suspended monorail double-track curved track beam, including two side track beams, characterized in that between the two side track beams, a longitudinal beam is arranged along the center line, the two ends of the longitudinal beam are connected to columns, and the two side track beams are suspended on both sides of the columns. The longitudinal beam and the track beam are connected into a whole by arranging multiple cross beams. This system can greatly reduce the vertical displacement and torsion angle of the track beam, increase the applicable span of the curved track beam, and improve the smoothness and comfort of the train running in the curve section.

[0009] Further, the longitudinal beam adopts a closed box section, and the cross beam adopts a box section or an I-shaped section to improve the torsional stiffness of the section.

[0010] Further, transverse diaphragms are arranged at intervals on the longitudinal beam, transverse stiffeners of the track beam are arranged above and outside the track beam, the webs of the longitudinal beam are aligned with the transverse stiffeners of the track beam and the transverse diaphragms of the longitudinal beam, the top plates of the cross beams are flush with the top plates of the track beam and the longitudinal beam, and the bottom plates of the cross beams are flush with the bottom plates of the track beam and the longitudinal beam.

[0011] Further, at the connection of the transverse stiffeners of the track beam and the cross beam, a transition section of the transverse stiffener is provided to improve the local stress of the structure.

[0012] Further, the column is composed of a column top plate, a column bottom plate, and a column web located between the column top plate and the column bottom plate. The column includes a column main body and bifurcated structures on both sides of the column main body. The bifurcated structure includes a column head end section and an inclined bifurcated section connecting the column head end section and the column main body. The column bottom plates between the column head end section and the inclined bifurcated section are transitioned by an arc, and the column top plates between the column head end section and the inclined bifurcated section are transitioned by an arc. The column top plates of the inclined bifurcated sections of the two side bifurcated structures are connected by an arc concave surface. From the column main body towards the column head end direction, the web height of the bifurcated structure gradually becomes smaller, and the column top plate of the column head end section is inclined downward from the inside to the outside direction; the longitudinal beam is connected to the column main body, and the track beam is suspended below the column head end section.

[0013] Further, each cross beam is divided into two sections, section A and section B. Section A is welded to the track beam, and section B is welded to the longitudinal beam. Section A and section B are connected by welding or bolts.

[0014] The cross section of the track beam is a thin-walled steel structure with an open bottom. The inner cavity is reserved for electromechanical equipment and vehicle running, and stiffening structures cannot be arranged, so the torsional stiffness is small. The longitudinal and transverse beam system of the present invention can restrain the bending and torsional deformation of the left and right line track beams in the curve section, make the structure stress uniform and deformation coordinated, thereby greatly reducing the vertical displacement and torsion angle of the track beam, increasing the applicable span of the curved track beam, and improving the smoothness and comfort of the train running in the curve section.

[0015] The invention has the following technical features:

[0016] (1) By means of the longitudinal and cross beam system, the left and right line track beams of the present invention are connected into a whole, thus improving the overall stiffness of the structure.

[0017] (2) The longitudinal beams of the present invention adopt a closed box section with a large torsional stiffness, and are installed on the columns at both the front and rear ends, which can effectively restrain the torsional deformation of the left and right line track beams.

[0018] (3) In view of the structural characteristics of the open section and small torsional stiffness of the suspended monorail, the longitudinal and cross beam system is adopted in the present invention to solve the problem of large deformation under the combined action of bending and torsion of the curved beam, which can greatly reduce the vertical displacement and torsional angle of the track beam under the action of load, improve the smoothness and comfort of the train running in the curve section, and increase the applicable span of the track beam in the curve section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a schematic diagram of the overall layout of the curved double - line track beam and the longitudinal and cross beam system.

[0020] Figure 2 FIG. is a schematic diagram of the cross - section at the web of the cross beam.

[0021] Figure 3 FIG. is a schematic diagram of the cross - section at the center of the cross beam.

[0022] Figure 4 FIG. is a schematic diagram of the cross - section of the cross beam.

[0023] Figure 5 FIG. is a schematic diagram of the standard cross - section of the longitudinal beam.

[0024] Figure 6 FIG. is a schematic diagram of the cross - section at the diaphragm.

[0025] Figure 7 FIG. is a schematic diagram of the cross - section at the end of the column.

[0026] In the figures, it includes: track beam 1, longitudinal beam 2, cross beam 3, track beam top plate 4, track beam transverse stiffener 5, longitudinal beam top plate 6, longitudinal beam diaphragm 7, cross beam top plate 8, transverse stiffener transition section 10, track beam bottom plate 11, longitudinal beam bottom plate 12, longitudinal beam web 13, cross beam web 14, cross beam bottom plate 15, column 16, column top plate 17, column head web 18, column head bottom plate 19. DETAILED DESCRIPTION OF THE INVENTION

[0027] The present invention will be further described below with reference to the embodiments shown in the drawings.

[0028] The main content of the present invention is as shown in the attached Figures 1 to 7 figures, and is described as follows in conjunction with the drawings.

[0029] See Figure 1, A longitudinal and cross beam system for a suspended monorail double - line curved track beam, mainly composed of a longitudinal beam 2 and multiple cross beams 3, etc. Between the left and right track beams 1, a longitudinal beam 2 is arranged along the center line. The front and rear ends of the longitudinal beam 2 are connected to the columns 16. The longitudinal beam 2 and the track beam 1 are connected into a whole by arranging multiple cross beams 3. The longitudinal beam 2 adopts a closed box - shaped cross - section, and the cross beam 3 can adopt a box - shaped cross - section or an I - shaped cross - section.

[0030] The layout spacing L of the cross beam 3 along the length direction of the longitudinal beam 2 generally takes 6 - 12m. For small - radius curved beams with a radius below 200m, L should preferably take 6 - 10m. When the radius of the curved beam is larger, the cross - beam spacing can be appropriately increased.

[0031] See Figures 2 to 3 , The left and right track beams 1 and the longitudinal beam 2 are all pre - fabricated in the factory. The cross beam 3 is pre - fabricated in sections. The cross beam 3 is divided into two sections, A and B. The structure within the width A is called section A, and the structure within the width B is called section B. The structure within the width A is welded to the track beam, and the structure within the width B is welded to the longitudinal beam. Section A and section B are connected by connecting plates and bolts. The cross - beam webs 14 are respectively aligned with the transverse stiffeners 5 of the track beam and the transverse diaphragms 7 of the longitudinal beam. The cross - beam top plates 8 are respectively aligned with the top plates 4 of the track beam and the top plates 6 of the longitudinal beam. The cross - beam bottom plates 15 are respectively aligned with the bottom plates 11 of the track beam and the bottom plates 12 of the longitudinal beam. The cross - beam segmentation is not limited to this description method and can be adjusted according to the needs of the construction process.

[0032] See Figure 2 , At the connection of the transverse stiffeners on the top surface of the track beam and the cross beam, a transverse stiffener transition section 10 is provided to improve the local stress of the structure. The transverse stiffener transition section 10 is welded to the cross beam.

[0033] See Figures 4 to 6 , The cross beam 3 is connected to the longitudinal beam 2. The cross beam can adopt a box - shaped cross - section or an I - shaped cross - section. The longitudinal beam 2 is provided with transverse diaphragms 7 at intervals.

[0034] As shown in the appendix Figure 7 , The front and rear ends of the longitudinal beam 2 are installed on the columns 16. The column 16 is composed of a column top plate 17, a column bottom plate 19, and a column web 18 located between the column top plate 17 and the column bottom plate 19. From the cross - section view, the column 16 includes a column main body and bifurcated structures on both sides of the column main body. The bifurcated structure includes a column head end section and an inclined bifurcated section connecting the column head end section and the column main body. The column bottom plates between the column head end section and the inclined bifurcated section are transitioned by an arc. The column top plates between the column head end section and the inclined bifurcated section are transitioned by an arc. The column top plates of the inclined bifurcated sections of the bifurcated structures on both sides are connected by an arc - shaped concave surface. From the column main body towards the column head end direction, the web height of the bifurcated structure gradually becomes smaller, and the column top plate of the column head end section is inclined downward from the inside to the outside direction.

[0035] The longitudinal beam 2 is connected to the column main body by welding or bolting. The track beam 1 is suspended below the end section of the column head and supported by a pin shaft or a support.

[0036] During the on-site construction process, after the left and right track beams 1 and the longitudinal beam 2 are installed, the A and B precast segments of each cross beam 3 are connected. The top, bottom plates and webs of the left and right sections of the cross beam 3 are respectively connected by welding or bolts (the bolt connection is shown in the figure).

[0037] The above description of the embodiments is to enable those of ordinary skill in the art to understand and apply the present invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the embodiments herein, and the improvements and modifications made by those skilled in the art to the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A longitudinal and transverse beam system for a suspended monorail double-track curved track beam, including two side track beams, characterized in that Between the two side track beams, a longitudinal beam is arranged along the center line. The two ends of the longitudinal beam are connected to the columns, and the two side track beams are suspended on both sides of the columns. The longitudinal beam and the track beams are connected into a whole by arranging multiple cross beams.

2. The crossbeam and longitudinal beam system for a suspended monorail double-track curved track beam according to claim 1, wherein The longitudinal beam adopts a closed box section, and the cross beam adopts a box section or an I-shaped section.

3. The crossbeam and longitudinal beam system for a suspended monorail double-track curved track beam as described in claim 1, characterized in that, The longitudinal beam is provided with diaphragms at intervals. Transverse stiffeners of the track beam are arranged above and outside the track beam. The web of the longitudinal beam is aligned with the transverse stiffeners of the track beam and the diaphragms of the longitudinal beam. The top plate of the cross beam is flush with the top plate of the track beam and the top plate of the longitudinal beam. The bottom plate of the cross beam is flush with the bottom plate of the track beam and the bottom plate of the longitudinal beam.

4. The crossbeam and longitudinal beam system for a suspended monorail double-track curved track beam according to claim 1, characterized in that, The column is composed of a column top plate, a column bottom plate and a column web located between the column top plate and the column bottom plate. The column includes a column main body and bifurcated structures located on both sides of the column main body. The bifurcated structure includes a column head end section and an inclined bifurcated section connecting the column head end section and the column main body. The column bottom plates between the column head end section and the inclined bifurcated section are transitioned by an arc. The column top plates between the column head end section and the inclined bifurcated section are transitioned by an arc. The column top plates of the inclined bifurcated sections of the two side bifurcated structures are connected by an arc-shaped concave surface. From the column main body towards the column head end direction, the web height of the bifurcated structure gradually becomes smaller, and the column top plate of the column head end section is inclined downward from the inside to the outside direction; the longitudinal beam is connected to the column main body, and the track beam is suspended below the column head end section.

5. The crossbeam and longitudinal beam system for a suspended monorail double-track curved track beam according to claim 1, wherein Each cross beam is divided into two sections, section A and section B. Section A is welded to the track beam, and section B is welded to the longitudinal beam. Section A and section B are connected by welding or bolts.

Images