A crossbeam structure for a suspended monorail double-track curved rail beam

Abstract

The application discloses a kind of for suspension single-track double-line curve track beam crossbeam structure, suspension single-track double-line curve track beam includes the track beam being arranged in two sides, the track beam is the steel structure track beam of open thin-walled section, it is characterized in that the web of crossbeam is aligned with the transverse stiffener of track beam, the roof of crossbeam is aligned with the roof of track beam, the bottom plate of crossbeam is aligned with the bottom plate of track beam, the top of transverse stiffener outside track beam is equipped with variable-height transition section and is connected with the roof of crossbeam.The crossbeam and its connecting structure of the application can constrain the bending-torsional deformation of left line and right line track beam of curve section, make structure stress uniform, deformation coordination, so that the vertical displacement and torsion angle of track beam are greatly reduced, the applicable span of curve track beam is increased, and the smoothness and comfort of train driving in curve section are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of beam structure for suspension type monorail double line curve track beam, belong to bridge engineering field. BACKGROUND

[0002] Suspension type monorail traffic has the advantages of high space utilization, small land occupation, strong line adaptability, short engineering period, etc., and can well meet the needs of small and medium-sized urban tourism and commuter traffic. The vehicle is suspended at the bottom of the track beam, and the track beam is supported on the pier by a pin shaft or a support. Single-line pier adopts L-shaped pier, and double-line section generally adopts Y-shaped pier.

[0003] The track beam of the suspension type monorail is a steel box beam section with an open bottom, and the running wheels, guide wheels and power supply system are all inside the track beam. To ensure the smoothness and comfort of train operation, the deformation of the track beam has strict requirements. Under the action of train static live load, the vertical deflection of simply supported track beam, beam end vertical angle and horizontal angle on both sides of track beam end should be controlled within the allowable value range.

[0004] Since the track beam is a thin-walled structure with an open bottom, the inner cavity is reserved for mechanical and electrical equipment and vehicle running, and no stiffening structure can be arranged, so the torsional stiffness is small.

[0005] The economically suitable span of the simply supported beam in general straight section is 25-30 m. When located in curve section, the bending-torsional coupling effect makes the deformation of track beam increase significantly compared with straight beam of the same span, and the suitable span is greatly reduced. The suitable span of curve section track beam is too small, which is very unfavorable for engineering construction. When the line is arranged along the municipal road, the turning curve section of the line is generally located at the ground road intersection position, and the arrangement of small-span curve beam will increase the number of bridge piers, and auxiliary portal piers are needed to cross the ground road, which makes the transparency of driving vision poor and the landscape poor. In addition, too many bridge piers at road intersections will limit the layout of underground pipelines or increase the amount of pipeline relocation, increasing the construction difficulty.

[0006] The present application provides a kind of beam and connecting structure for suspension type monorail double line curve track beam, to constrain the bending-torsional deformation of track beam, increase the suitable span of curve track beam, improve the smoothness and comfort of train in curve section. SUMMARY

[0007] The present application provides a kind of beam structure for suspension type monorail double line curve track beam, to constrain the bending-torsional deformation of track beam, increase the suitable span of curve track beam.

[0008] The technical scheme of the present application is as follows: a cross beam structure for a suspended single-track double-line curved track beam, the suspended single-track double-line curved track beam comprising track beams arranged on two sides, the track beams being steel structure track beams with open thin-walled sections, characterized in that a cross beam is arranged between the track beams on the two sides, the web of the cross beam is aligned with the transverse stiffening ribs of the track beams, the top plate of the cross beam is aligned with the top plate of the track beams, the bottom plate of the cross beam is aligned with the bottom plate of the track beams, and the end portions of the transverse stiffening ribs on the outer side of the track beams are provided with variable-height transition sections connected with the top plate of the cross beam.

[0009] Further, the cross beam adopts a H-shaped or box-shaped section.

[0010] Further, when the cross beam adopts a box-shaped section, a cross partition plate is arranged inside the box, and a manhole is arranged in the middle of the cross partition plate.

[0011] Further, the cross beam is divided into a cross beam A section and a cross beam B section, the cross beam A section is welded at a corresponding position on the inner side of the track beam, and the two ends of the cross beam B section are respectively connected with the cross beam A sections arranged on the track beams on the two sides through bolt connection or welding connection.

[0012] Further, a construction method for the cross beam structure of the suspended single-track double-line curved track beam comprises the following steps:

[0013] Step 1: The track beams on the inner side of the curve and the outer side of the curve are respectively prefabricated in a factory, and a cross beam is prefabricated, wherein the cross beam comprises a cross beam A section and a cross beam B section;

[0014] Step 2: The cross beam A section is welded on the inner side of the track beam in the factory, the top plate of the cross beam A section is connected with the top plate of the track beam, the bottom plate of the cross beam A section is connected with the bottom plate of the track beam, the web of the cross beam section is connected with the transverse stiffening ribs of the track beam, and the top portion of the transverse stiffening ribs on the outer side of the track beam is provided with a variable-height transition section connected with the top plate of the cross beam A section;

[0015] Step 3: The prefabricated track beams on the inner side of the curve and the outer side of the curve are installed on the pier on site, the two ends of the cross beam B section are respectively connected with the cross beam A sections welded on the prefabricated track beams on the inner side of the curve and the outer side of the curve through high-strength bolts, the web of the cross beam A section is connected with the web of the cross beam B section, the bottom plate of the cross beam A section is connected with the bottom plate of the cross beam B section, and the web of the cross beam A section is connected with the web of the cross beam B section.

[0016] The cross beam and the connecting structure thereof can constrain the bending and torsional deformation of the left-line and right-line track beams of the curved section, make the structural stress uniform and the deformation coordinated, thereby greatly reducing the vertical displacement and torsional angle of the track beam, increasing the applicable span of the curved track beam, and improving the smoothness and comfort of the train running on the curved section. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A plan view of the cross beam is shown.

[0018] Figure 2 This is a schematic diagram of the transverse section of the bridge (with transverse stiffening ribs at the track beam).

[0019] Figure 3 This is a schematic diagram of the transverse section of the bridge (where the track beam has no stiffening ribs).

[0020] Figure 4 This is a standard cross-sectional view of a box-shaped beam.

[0021] Figure 5 This is a cross-sectional view of the box-shaped beam at the diaphragm. Detailed Implementation

[0022] The specific structure of the present invention is given in detail in the following embodiments and accompanying drawings.

[0023] The main contents of this invention are as follows Figures 1-5 As shown in the attached diagram, the explanation is as follows:

[0024] like Figures 1-3 As shown, a transverse connecting beam (hereinafter referred to as crossbeam 2) is provided between the left and right track beams 1. The crossbeam can be a box section or an I-beam section.

[0025] The web 3 of the crossbeam is aligned with the transverse stiffening rib 4 of the track beam, the top plate 5 of the crossbeam is aligned with the top plate 6 of the track beam, and the bottom plate 7 of the crossbeam is aligned with the bottom plate 8 of the track beam.

[0026] like Figure 1 As shown, a variable-height transition section 9 is provided at the connection between the transverse stiffener 4 of the track beam and the crossbeam. Specifically, the transverse stiffener 4 of the track beam is set on the outer side of the track beam along the vertical direction of the track. The transverse stiffener 4 of the track beam extends towards the crossbeam, and its end forms a variable-height transition section. The end of the variable-height transition section is connected to the crossbeam by bolts. The connection between the transverse stiffener 4 of the track beam and the crossbeam through the variable-height transition section 9 can improve the local stress at the connection, reduce stress concentration, and make the structure more uniformly stressed and deformably coordinated.

[0027] like Figure 1 As shown, the spacing L of the crossbeams 2 along the length of the track beam 1 should be 6~12m when the curve radius is less than 200m. When the curve beam radius is larger, the crossbeam spacing can be appropriately increased.

[0028] The crossbeam can be made of I-shaped or box girder cross-section. If the track beam is a large-radius curved beam, the crossbeam should be made of I-shaped cross-section; if the track beam is a small-radius curved track beam, the crossbeam should be made of box girder cross-section.

[0029] like Figure 4 and 5As shown, when the cross beam 2 adopts a box-shaped section, the web plate is arranged in alignment with the transverse stiffening rib 4 of the track beam, and a transverse partition plate 10 is arranged inside the box, a manhole 11 is arranged in the middle of the transverse partition plate 10, facilitating construction operation.

[0030] The construction method of the present application comprises the following steps:

[0031] Step 1, the track beams 1 on the inside and outside of the curve are respectively prefabricated in the factory, and the cross beams 2 are prefabricated, wherein the cross beam comprises a cross beam A section and a cross beam B section;

[0032] Step 2, the cross beam A section is welded on the track beam 1 in the factory, the top plate 5 of the cross beam A section is connected with the top plate 6 of the track beam 1, the bottom plate 7 of the cross beam A section is connected with the bottom plate 8 of the track beam 1, the web plate 3 of the cross beam A section is connected with the transverse stiffening rib 4 of the track beam 1, and the top of the transverse stiffening rib on the outside of the track beam is provided with a variable-height transition section 9 connected with the top plate of the cross beam A section;

[0033] Step 3, the prefabricated track beams 1 on the inside and outside of the curve are installed on the pier in the field, the two ends of the cross beam B section are connected with the cross beam A section welded on the prefabricated track beams 1 on the inside and outside of the curve through high-strength bolts, the web plate of the cross beam A section is connected with the web plate of the cross beam B section, the bottom plate of the cross beam A section is connected with the bottom plate of the cross beam B section, and the web plate of the cross beam A section is connected with the web plate of the cross beam B section. The high-strength bolt connection is beneficial to deformation control and fast installation.

[0034] The present application has the following technical features:

[0035] Under the action of the use load, the curved track beam is subjected to bending and torsional deformation. The suspension-type single track is a steel structure track beam with an open thin-walled section, and the bending and torsional coupling effect can greatly increase the vertical displacement, lateral displacement and torsional deformation of the track beam at the midspan. When the cross beam is arranged, the top plate, bottom plate and web plate of the cross beam are connected with the top plate, bottom plate and stiffening rib of the track beam respectively, which can constrain the torsional deformation of the track beams on the inside and outside of the curve, thereby greatly reducing the displacement and torsional angle of the track beam.

[0036] When the cross beam is arranged, the applicable span of the curved track beam can be increased.

[0037] When the cross beam is arranged, the torsional angle of the track beam can be reduced, and the smoothness and comfort of the train driving on the curved section can be effectively improved.

[0038] The cross beam can adopt an I-shaped section or a box-shaped section. The large-radius curved beam can adopt an I-shaped section, and the small-radius curved track beam is recommended to adopt a box-shaped section.

Claims

1. A crossbeam structure for a suspended monorail double-track curved rail beam comprising rail beams provided on both sides, the rail beams being steel structure rail beams of an open thin-walled section, characterized in that The two side track beams are provided with a cross beam, the web of the cross beam is aligned with the transverse stiffening rib of the track beam, the top plate of the cross beam is aligned with the top plate of the track beam, the bottom plate of the cross beam is aligned with the bottom plate of the track beam, the transverse stiffening rib outside the track beam is provided with a variable-height transition section connected with the top plate of the cross beam, the cross beam is divided into a cross beam A section and a cross beam B section, the cross beam A section is welded at a corresponding position inside the track beam, and the two ends of the cross beam B section are respectively connected with the cross beam A section mounted on the two side track beams through bolt connection or welding connection; the cross beam adopts an I-shaped or box-shaped cross section, the track beam is a large-radius curved beam, and then the cross beam adopts an I-shaped cross section; the track beam is a small-radius curved track beam, and then the cross beam adopts a box-shaped cross section.

2. A cross beam construction for a suspended monorail double track curvilinear beam as claimed in claim 1, characterized in that, The cross beam adopts a box-shaped cross section, and a cross partition plate is arranged in the box body.

3. A cross beam construction for a suspended monorail double track curvilinear beam as defined in claim 1 wherein The method comprises the following steps: Step 1, the factory respectively pre-fabricates the track beams on the inside and outside of the curve, and pre-fabricates the cross beam, wherein the cross beam comprises a cross beam A section and a cross beam B section; Step 2, the cross beam A section is welded on the inside of the track beam in the factory, the top plate of the cross beam A section is connected with the top plate of the track beam, the bottom plate of the cross beam A section is connected with the bottom plate of the track beam, the web of the cross beam A section is connected with the transverse stiffening rib of the track beam, and the top part of the transverse stiffening rib outside the track beam is provided with a variable-height transition section connected with the top plate of the cross beam A section; Step 3, the pre-fabricated track beams on the inside and outside of the curve are installed on the bridge pier on site, the two ends of the cross beam B section are respectively connected with the cross beam A section welded on the pre-fabricated track beams on the inside and outside of the curve through high-strength bolts, the web of the cross beam A section is connected with the web of the cross beam B section, the bottom plate of the cross beam A section is connected with the bottom plate of the cross beam B section, and the web of the cross beam A section is connected with the web of the cross beam B section.

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