CN218951851U - Steel spring floating slab track bed for urban rail transit large-number high-speed turnout - Google Patents

Abstract

The utility model provides a large-number high-speed turnout steel spring floating slab track bed for urban rail transit, which is integrally in a herringbone shape, wherein the floating slab is divided into four turnout slabs, each turnout slab is connected by a centrally-mounted shear hinge, and a plurality of vibration isolator point supports are densely arranged in the four turnout slabs; the switch board is big plate structure, is equipped with the observation section of thick bamboo on the switch board. The utility model effectively solves the problem of combination of the large-number turnout and the steel spring floating slab ballast bed of the urban rail transit, realizes special vibration and noise reduction target requirements, meets the environment-friendly requirement of an operation line, ensures the driving safety and fills the blank of the vibration reduction ballast bed of the large-number turnout steel spring floating slab of the urban rail transit in China; the method effectively solves the problems that the integrity, vibration reduction and noise reduction effects of a large-number turnout area are improved under the working condition of a high-speed line by a small-number floating slab turnout, the running stability and lateral turnout speed of a train passing through the steel spring floating slab turnout are improved, the turn-back time is shortened, and the traffic capacity is improved.

Description

Steel spring floating slab track bed for urban rail transit large-number high-speed turnout

Technical Field

The utility model relates to the technical field of urban rail transit, in particular to a high-speed turnout steel spring floating slab track bed with large number for urban rail transit.

Background

At present, urban rail transit is required to be faced with the problem of vibration noise caused by train operation inevitably while bringing punctual, quick and comfortable. With the development of urban rail transit, urban rail transit market domains and inter-city high-speed lines are more and more, the conventional number turnouts are more and more difficult to meet the requirement of train high-speed passing, and the large number high-speed turnouts can greatly shorten the turn-back time of trains, improve the traffic capacity and are more and more applied.

The vibration reduction measures of the urban rail transit are generally divided into three stages of medium vibration reduction measures, high vibration reduction measures and special vibration reduction measures, wherein the special vibration reduction measures mainly comprise steel spring floating slab track beds, the vibration reduction effect is best, and can reach 15-25 dB, but the conventional 9-grade turnout of urban rail transit at home and abroad adopts more steel spring floating slab technology, the 12-grade turnout also has a small amount of application, and the steel spring floating slab track beds of the large-grade turnout (30, 38, 42 and the like) of the urban rail transit are not yet applied to the urban rail transit at home and abroad. However, the use of small-number switch steel spring floating plates mainly has the following problems: firstly, the design speed of a conventional small-number turnout steel spring floating slab track bed is low; secondly, the stability of the conventional small-number turnout steel spring floating slab ballast bed is low when the high-speed side of the turnout is crossed; thirdly, the thickness of the floating plate of the steel spring of the conventional small-number turnout is smaller, and the thickness of the floating plate at the pull rod groove of the switch machine is smaller, so that the floating plate is stressed disadvantageously; fourth, under the train high-speed operation condition, the ideal vibration reduction effect is difficult to obtain;

therefore, a safe, reliable and efficient design method of the high-speed turnout steel spring floating slab track bed of the urban rail transit large number is urgently needed, so that good vibration and noise reduction targets are achieved, the environment-friendly requirement of an operation line is met, and driving safety is guaranteed.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a large-number high-speed turnout steel spring floating slab track bed for urban rail transit.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the large-number high-speed turnout steel spring floating slab track bed for urban rail transit is in a herringbone shape as a whole, the floating slab is divided into four turnout slabs, each turnout slab is connected by adopting a middle-set shear hinge, and a plurality of vibration isolator point supports are densely arranged in the four turnout slabs; the switch board is the big plate structure, be equipped with the observation section of thick bamboo on the switch board. Through the design of the large-plate structure, the requirement of the large-number high-speed turnout is met, and the integrity of the large-number turnout area is ensured.

The number of the turnout is related to the turning angle, the turning angle is the frog angle, the turnout number represents the main size of each part of the turnout, the smaller the frog angle is, the larger the turnout number is, the larger the radius of the guide curve is, the more stable the train lateral line passes through the turnout, the higher the allowable crossing speed is, the larger the allowable lateral passing speed is, the large-number turnout design can greatly improve the lateral crossing speed of the train passing through the steel spring floating slab turnout, and meanwhile, the stability of the train passing through the steel spring floating slab turnout in the lateral crossing process can be obviously improved.

Preferably, the vertical rigidity of each vibration isolator is 7.5kN/mm vibration isolators, and at least two vibration isolators are arranged in the transverse direction of the turnout plate. The horizontal rigidity of the turnout plate is not lower than the vertical rigidity, and the transverse stability of the train when passing through the steel spring floating plate turnout is effectively ensured.

Preferably, the transverse distance between the two vibration isolators is larger than 3m, and the vibration isolators are additionally arranged between the two vibration isolators. The arrangement space of the vibration isolators is more reasonable, and the stability and the comfort of the train during high-speed passing are ensured.

Preferably, the railroad switch plate is provided with rails fixed by sleeper to form a track, and the observation cylinder is arranged between the rails of the track.

Preferably, four switch boards are first switch board, second switch board, third switch board and fourth switch board respectively, the horizontal width of switch board increases gradually from first switch board to the direction of fourth switch board, guarantees that four switch boards satisfy the railway roadbed of big number switch and use, the track includes main rail, fork rail and fork district, the observation section of thick bamboo setting of fork district is in between the rail, the observation section of thick bamboo setting of main rail is in on the central line of main rail, the observation section of thick bamboo setting of fork rail in on the central line of fork rail. After the turnout distinction bifurcation of the track is ensured, each track line is provided with an observation cylinder.

Preferably, the length of the turnout plate is between 15 and 100m, the width of the turnout plate is between 2700 and 4200mm, and the thickness of the turnout plate is between 400 and 600 mm. According to different switch angles, the turnout plates have different plate dividing lengths, so that the utility model can adapt to the design of the steel spring floating plate turnout under various working conditions according to the line conditions, the thickness of the turnout plates is thicker, the increase of the thickness of the floating plates is ensured, and the stress on the floating plates at the pull rod grooves of the switch machine is more favorable.

Preferably, the switch board is installed on the tunnel basement, install on the switch board the sleeper, install on the sleeper the rail, the both sides of switch board pass through the sealing strip with the tunnel basement is sealed, be equipped with central ditch on the tunnel basement under the switch board, the observation section of thick bamboo that sets up on the switch board with the central ditch corresponds the setting, conveniently carries out inspection and clearance work to the central ditch through the observation section of thick bamboo.

Compared with the prior art, the utility model has the beneficial effects that:

1. the method effectively solves the problem of combination of the large-number turnout and the steel spring floating slab ballast bed of the urban rail transit, realizes special vibration and noise reduction target requirements, meets the environment-friendly requirement of an operation line, ensures the driving safety, and fills the blank of the large-number turnout steel spring floating slab vibration reduction ballast bed of the urban rail transit in China;

2. the steel spring floating plate of the large-number high-speed turnout effectively solves the problem that the whole body of a large-number turnout area and the vibration and noise reduction effect are improved when a small-number floating plate turnout is used for a high-speed line working condition;

3. the steel spring floating plate of the large-number high-speed turnout effectively improves the driving stability of the turnout of the small-number floating plate under the working condition of a high-speed line;

4. the lateral crossing speed of the steel spring floating slab turnout is greatly improved, the turn-back time is shortened, and the traffic capacity is improved;

5. the technical index and vibration reduction effect of the urban rail transit large-number high-speed turnout are ensured by an advanced and effective simulation model and a checking method.

Drawings

FIG. 1 is a schematic view of the general planar structure of a switch according to embodiment 1 of the present utility model;

fig. 2 is a schematic structural diagram of a first fork board according to embodiment 1 of the present utility model;

fig. 3 is a schematic structural view of a second switch plate according to embodiment 1 of the present utility model;

FIG. 4 is a schematic structural view of a third fork board according to embodiment 1 of the present utility model;

fig. 5 is a schematic structural view of a fourth switch plate according to embodiment 1 of the present utility model;

FIG. 6 is a cross-sectional view (I) of a rectangular switch of a steel spring floating slab track bed of a large-number high-speed switch for urban rail transit;

FIG. 7 is a cross sectional view (I) of a horseshoe-shaped switch of a steel spring floating slab track bed of a large-number high-speed switch for urban rail transit;

FIG. 8 is a cross sectional view (II) of a rectangular switch of a steel spring floating slab track bed of a large-number high-speed switch for urban rail transit;

FIG. 9 is a cross-sectional view of a horseshoe switch of the floating slab track bed of the high-speed switch steel spring of the large number of the urban rail transit of the utility model (II).

Detailed Description

For a further understanding of the objects, construction, features, and functions of the utility model, reference should be made to the following detailed description of the preferred embodiments.

1-9, a large-number high-speed turnout steel spring floating slab track bed for urban rail transit is integrally in a herringbone shape, the floating slab is divided into four turnout slabs 100, each turnout slab 100 is connected by a middle-set shear hinge, and a plurality of vibration isolators 110 are densely arranged in the four turnout slabs 100 for point support; the switch board 100 is a large board structure, and a plurality of observation barrels 120 are arranged on the switch board 100. Through the design of the large plate structure, the requirement of the large-number high-speed turnout can be met through fewer plates, and the integrity of the large-number turnout area is ensured. The self-vibration frequency of the floating slab is 6-10 Hz, the integrity is better, and the vibration and noise generated by the interaction of the wheel and the rail during the running of the train can be better absorbed and isolated, thereby reaching the special vibration and noise reduction requirement target of the high-speed turnout line with the speed of more than 15 dB.

The number of the turnout is related to turning angle, the turning angle is a frog angle, the turnout number represents the main size of each part of the turnout, the smaller the frog angle is, the larger the turnout number is, the larger the radius of a guide curve is, the more stable the train lateral line passes through the turnout, the higher the allowable crossing speed is, the larger the allowable lateral crossing speed is, the large-number turnout design can greatly improve the lateral crossing speed of the train passing through a steel spring floating plate turnout, shorten the turn-back time and improve the traffic capacity; meanwhile, the stability of the train when passing through the side turnout of the steel spring floating slab turnout can be obviously improved.

The vertical rigidity of the vibration isolator 110 is 7.5kN/mm, the vibration isolator 110 is a steel spring vibration isolator and has a good damping ratio, the vibration isolator 110 is arranged in the turnout plate 100, the vibration isolator 110 is guaranteed to have good sealing waterproof performance, the energy dissipation function of the vibration isolator is guaranteed, the system damping ratio is guaranteed to meet the requirement, and at least two vibration isolators 110 are arranged in the transverse direction of the turnout plate 100. The horizontal rigidity of the turnout plate 100 is not lower than the vertical rigidity, so that the transverse stability of the train when passing through the steel spring floating plate turnout is effectively ensured.

The transverse distance between the two vibration isolators 110 is greater than 3m, and a vibration isolator is additionally arranged between the two vibration isolators 110. The arrangement space of the vibration isolators 110 is more reasonable, and the stability and the comfort of the train passing at high speed are ensured.

The railroad switch plate 100 is provided with rails 300 fixed by sleepers 200 to form a track, and a plurality of observation barrels 120 are provided between the rails 300 of the track.

Four turnout plates 100 are respectively a first turnout plate 101, a second turnout plate 102, a third turnout plate 103 and a fourth turnout plate 104, the transverse width of the turnout plate 100 gradually increases from the first turnout plate 101 to the fourth turnout plate 104, the four turnout plates 100 are guaranteed to meet the use of a track bed of a large-number turnout, the track comprises a main track 301, a turnout track 302 and a turnout zone 303, an observation barrel 120 of the turnout zone 303 is arranged between the steel rails, an observation barrel 120 of the main track 301 is arranged on the central line of the main track 301, and an observation barrel 120 of the turnout track 302 is arranged on the central line of the turnout track 302. After ensuring that the turnout sections of the track diverge, each track line is provided with an observation tube 120.

The length of the turnout plate 100 is 15-100 m, the width of the turnout plate 100 is 2700-4200 mm, and the thickness of the turnout plate 100 is 400-600 mm. According to different switch angles, the switch plates have different plate dividing lengths, so that the utility model can adapt to the design of the steel spring floating plate switch under various working conditions according to the line conditions, the thickness of the switch plate 100 is thicker, the increase of the thickness of the floating plate is ensured, and the stress on the floating plate at the pull rod groove of the switch machine is more favorable.

As shown in fig. 6, 7, 8 and 9, the switch board 100 is installed on the tunnel substrate 400, the sleeper 200 is installed on the switch board 100, the rail 300 is installed on the sleeper 200, both sides of the switch board 100 are sealed with the tunnel substrate 400 through the sealing strip 500, good sealing waterproof performance is guaranteed between the switch board 100 and the tunnel substrate 400, good sealing performance is guaranteed, a central ditch 600 is arranged on the tunnel substrate under the switch board, the observation cylinder 120 arranged on the switch board is arranged corresponding to the central ditch 600, and the central ditch 600 is conveniently checked and cleaned through the observation cylinder 120.

Example 1

A steel spring floating slab track bed of a large-number high-speed turnout of urban rail transit is based on design parameters of a 60kg/m steel rail 42-number passenger special line (07) 006 single turnout.

The high-speed switch steel spring floating slab of urban rail transit large number wholly is "herringbone" structure, comprises 4 switch boards 100, and through put formula shear hinge connection in the middle of each board, be provided with a plurality of isolator 110 point type supports in the 4 switch boards 100 are intensive, and isolator 110 vertical rigidity all adopts 7.5kN/mm. A plurality of observation barrels 120 are provided on each of the 4 switch plates 100.

Preferably, the 4 switch plates 100 are large plate structures.

Preferably, one vibration isolator 110 is added in the middle when the lateral spacing of the vibration isolators 110 is greater than 3 m.

The four switch boards 100 are respectively a first switch board 101, a second switch board 102, a third switch board 103 and a fourth switch board 104, the transverse width of the switch board 100 gradually increases from the first switch board 101 to the fourth switch board 102, the length of the first switch board 101 is 55m, the width of the switch board is 3600-3800 mm, the thickness of the switch board is 500mm, the length of the second switch board 102 is 49m, the width of the switch board is 3800-4800 mm, the thickness of the switch board is 500mm, the length of the third switch board 103 is 56m, the width of the switch board is 4800-6000 mm, the thickness of the switch board is 500mm, the length of the fourth switch board 104 is 49.2m, the width of the switch board is 6000-7200 mm, and the thickness of the switch board is 500mm.

In the specific installation of the present utility model, the following steps are required:

(1) And (3) establishing a three-dimensional space coupling dynamics model of the train-turnout-track slab, and analyzing deformation analysis, structural vibration time course analysis, vibration reduction effect analysis, driving safety and comfort analysis of a floating slab structure when the train passes at high speed.

(2) And (3) establishing a three-dimensional space coupling dynamics model of the train-turnout-track slab, and analyzing vertical and horizontal relative displacement between slabs, vertical displacement of steel rails, natural frequency of a floating slab, vibration acceleration of a train body, derailment coefficient, wheel load shedding rate and the like.

(3) The strength of the steel rail, the shear hinge, the floating slab and the vibration isolator in the fork area is checked by considering the effects of the environmental temperature, the structural gravity and the train load, the structural strength can meet the use requirements, and the floating slab track system is safe and reliable.

A multi-degree-of-freedom vehicle body model is established by using a multi-body system dynamics theory, the multi-degree-of-freedom vehicle body model is coupled with a wheel track contact model, large-scale dynamics simulation software such as ANSYS, UM and the like is adopted, three-dimensional coupling dynamics simulation calculation is carried out by using a mode superposition method and the like, various technical performance indexes are ensured to meet the requirements, and the technical indexes and the vibration reduction effect of the large-number high-speed turnout of the urban rail transit are ensured by an advanced and effective simulation model and a checking method.

The utility model has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of practicing the utility model. It should be noted that the disclosed embodiments do not limit the scope of the utility model. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims (7)

1. A high-speed switch steel spring floating slab track bed of urban rail transit large number, its characterized in that: the whole floating slab is in a herringbone shape and is divided into four turnout slabs, the turnout slabs are connected by adopting a middle-set shear hinge, and a plurality of vibration isolator point supports are densely arranged in the four turnout slabs; the switch board is the big plate structure, be equipped with the observation section of thick bamboo on the switch board.

2. The urban rail transit high-speed switch steel spring floating slab ballast bed of claim 1, wherein: the vertical rigidity of the vibration isolators is 7.5kN/mm, and at least two vibration isolators are arranged in the transverse direction of the turnout plate.

3. The urban rail transit high-speed switch steel spring floating slab ballast bed of claim 2, wherein: the transverse distance between the two vibration isolators is larger than 3m, and the vibration isolators are additionally arranged between the two vibration isolators.

4. The urban rail transit high-speed switch steel spring floating slab ballast bed of claim 1, wherein: the railroad switch plate is provided with a rail which is fixed by a sleeper to form a track, and the observation cylinder is arranged between the rails of the track.

5. The urban rail transit high-speed switch steel spring floating slab ballast bed of claim 4, wherein: four the switch board is first switch board, second switch board, third switch board and fourth switch board respectively, the horizontal width of switch board increases gradually from first switch board to the direction of fourth switch board, the track includes main rail, switch rail and fork district, the observation section of thick bamboo setting in fork district is in between the rail, the observation section of thick bamboo setting of main rail is in on the central line of main rail, the observation section of thick bamboo setting in the central line of switch rail.

6. The urban rail transit high-speed switch steel spring floating slab ballast bed of claim 1, wherein: the length of the turnout plate is between 15 and 100m, the width of the turnout plate is between 2700 and 4200mm, and the thickness of the turnout plate is between 400 and 600 mm.

7. The urban rail transit high-speed switch steel spring floating slab ballast bed of claim 4, wherein: the switch board is installed on the tunnel basement, install on the switch board the sleeper, install on the sleeper the rail, the both sides of switch board pass through the sealing strip with the tunnel basement is sealed, be equipped with central ditch on the tunnel basement under the switch board, the observation section of thick bamboo that sets up on the switch board with the central ditch corresponds the setting.

Images