CN115748312A - Ballastless track structure and method suitable for micro track traffic ground line - Google Patents
Ballastless track structure and method suitable for micro track traffic ground line Download PDFInfo
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- CN115748312A CN115748312A CN202211454990.7A CN202211454990A CN115748312A CN 115748312 A CN115748312 A CN 115748312A CN 202211454990 A CN202211454990 A CN 202211454990A CN 115748312 A CN115748312 A CN 115748312A
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Abstract
The invention relates to the technical field of rail transit, in particular to a ballastless track structure and a ballastless track method suitable for a miniature rail transit ground line, which comprise a base; the ballastless track unit comprises a prefabricated sleeper plate and is arranged on the base, and a groove is reserved in the upper part of the prefabricated sleeper plate and is used for placing a bottom structure of the groove-shaped steel rail; the two limiting blocks are respectively arranged on two sides of the groove-shaped steel rail and laterally wrap the groove-shaped steel rail and the prefabricated sleeper slab; the concrete structure is cast on the side surface of the limiting block in a cast-in-place manner, and is respectively lapped with the limiting block and the base through reinforcing steel bars to form an integral structure; the limiting blocks and the base are overlapped to form an integral structure, the groove-shaped steel rail and the prefabricated sleeper plate are wrapped in the integral structure, the groove-shaped steel rail is installed without fasteners, sufficient stability can be provided, and driving safety is guaranteed.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a ballastless track structure and a ballastless track method suitable for a miniature rail transit ground line.
Background
The micro rail transit is a new rail transit type, is different from rail transit types such as subways, light rails and the like, is a low-traffic rail transit type, has the advantages of light structure, flexible operation grouping and low-traffic and high-frequency, and can fill the blank of low-traffic urban public transit transportation. Compared with the overhead and underground section laying mode, the ground line laying mode adopted by the miniature rail transit is more economical, safer and more convenient for passengers to go out, and the selection of the rail structure form of the ground line is particularly important.
Application number is 201420801090X a chinese utility model patent discloses a split type supports in succession and does not have fastener railway roadbed system, including concrete track board and concrete support rail groove, the top of concrete track board is located to concrete support rail groove, is equipped with rail, backing plate and polymer filler in the concrete support rail groove, and the bottom of rail is located to the backing plate, and the backing plate is laid in succession below the rail, and bonds in an organic whole with concrete support rail groove, and the outside of rail is located to the polymer filler. The split continuous support fastener-free road bed system is convenient to maintain and replace, prolongs the service life of a line, adopts continuous laying and has high laying efficiency.
However, the polymer filler is arranged on the outer side of the steel rail, so that the limit effect of the polymer filler on the steel rail is limited, the stability of the steel rail is poor, and the normal and safe use of the standard rail in driving is influenced. Especially, in a line with a small turning radius, the polymer filler is subjected to extrusion damage, and derailment occurs when the damage is serious.
Disclosure of Invention
The invention aims to provide a ballastless track structure and a ballastless track method suitable for a micro track traffic ground line, and aims to solve the problem of unstable limiting of a steel rail through a polymer filler. In order to achieve the above object, the present invention is achieved by the following technical solutions:
in a first aspect, the present invention provides a ballastless track structure suitable for a micro track traffic ground line, including:
a base;
the ballastless track unit comprises a prefabricated sleeper plate and is arranged on the base, and a groove is reserved in the upper part of the prefabricated sleeper plate and is used for placing a bottom structure of the groove-shaped steel rail; the two limiting blocks are respectively arranged on two sides of the groove-shaped steel rail and laterally wrap the groove-shaped steel rail and the prefabricated sleeper slab;
and the concrete structure is cast on the side surface of the limiting block in situ, and is respectively lapped with the limiting block and the base through reinforcing steel bars to form an integral structure.
In a second aspect, the present invention provides a ballastless track structure suitable for a micro track traffic ground line, including:
a base;
two ballastless track units according to the first aspect, wherein a transverse support beam is arranged between the two ballastless track units;
and the concrete structure is cast on the side surface of the limiting block in a cast-in-place mode, and is respectively lapped with the limiting block and the base through reinforcing steel bars to form an integral structure.
As a further technical scheme of the first aspect or the second aspect, elastic spacer bushes are coated on the matching surfaces of the grooved steel rails, the limiting blocks and the precast sleeper plates.
As a further technical scheme of the first aspect or the second aspect, a cushion layer poured by cement asphalt mortar is arranged between the prefabricated sleeper slab and the base.
As a further technical scheme of the first aspect or the second aspect, a plurality of limiting grooves are formed in two sides of the prefabricated sleeper plate, and limiting piers matched with the limiting grooves are arranged on the base.
As a further technical solution of the first aspect or the second aspect, the concrete structure is cast in place of foamed concrete.
As a further technical scheme of the second aspect, the transverse supporting beams are arranged at intervals along the longitudinal direction of the rail.
As a further technical solution of the second aspect, the inner side concrete structure is provided between the transverse support beam and the base.
In a third aspect, the invention provides a construction method of the ballastless track structure according to the first aspect, which includes the following steps:
excavating a trapezoidal foundation pit for installing a ballastless track structure on a ground roadbed, pouring a reinforced concrete base, assembling a prefabricated sleeper slab, a groove-shaped steel rail and a limiting block, pouring concrete on two sides of the whole track structure, and respectively overlapping the concrete with the base and the limiting block through reserved steel bars to form a single-track ballastless track structure.
In a fourth aspect, the invention provides a construction method of the ballastless track structure according to the second aspect, which is characterized by comprising the following steps:
excavating a trapezoidal foundation pit for installing a ballastless track structure on a ground roadbed, pouring a reinforced concrete base, installing a prefabricated sleeper slab, respectively assembling the prefabricated sleeper slab, a groove-shaped steel rail and a limiting block to form two ballastless track units, pouring concrete on two sides of the whole track structure, sequentially pouring concrete between the two ballastless track units, laying a transverse supporting beam and pouring concrete to form the double-track ballastless track structure.
The beneficial effects of the invention are as follows:
(1) The concrete-free track sleeper unit comprises a prefabricated sleeper plate and two limiting block ballastless track units, concrete is cast on the side faces of the limiting blocks in a cast-in-place mode, the limiting blocks and the base are respectively overlapped through reinforcing steel bars to form an integral structure, the groove-shaped steel rails and the prefabricated sleeper plate are wrapped in the integral structure, the groove-shaped steel rails are installed without fasteners, sufficient stability can be provided, and driving smoothness and stability are guaranteed.
(2) The elastic sheath is arranged on two sides of the groove-shaped steel rail, and is fixedly arranged on the limiting block between the steel rail and the limiting block by adopting the elastic sheath, so that elastic force is provided for the steel rail, the influence of vibration is reduced, the effect of absorbing noise is achieved, and the effect of replacing a fastener is achieved.
(3) The cushion layer poured by the cement asphalt mortar is arranged between the prefabricated sleeper slab and the base, has good bonding performance, is used for elastic adjustment, and plays a role in leveling and buffering a track structure. In addition, due to the whole limiting effect of the track structure, the groove-shaped steel rail and the prefabricated sleeper plate can move in a certain space, but only in the safe and reasonable deformation range provided by the elastic material, the problems that the thickness of a joint layer is difficult to control and the bonding performance is difficult to guarantee are indirectly solved while good vibration reduction is realized.
(4) A plurality of limiting grooves are formed in two sides of the prefabricated sleeper slab, and limiting piers matched with the limiting grooves are arranged on the base. Through the limiting function between the limiting pier studs on the limiting groove and the base, the longitudinal and transverse displacements of the prefabricated sleeper slab are limited.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention. It will be further appreciated that the figures are for simplicity and clarity and have not necessarily been drawn to scale. The invention will now be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
fig. 1 shows a schematic structural diagram of a ballastless track according to a first embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a ballastless track in a third embodiment of the invention;
FIG. 3 illustrates a top view of a prefabricated sleeper slab construction in an embodiment of the present invention.
In the figure: 1. a base; 2. a cushion layer; 3. prefabricating a sleeper plate; 4. foam concrete; 5. an elastic sheath; 6. a limiting block; 7. a trough-shaped steel rail; 8. an asphalt layer; 9. a roadbed; 10. a transverse support beam; 11. a limiting groove; 12. limiting a pier stud; 13. and (4) prefabricating longitudinal seams among the sleeper plates.
Detailed Description
The technical solutions in the exemplary embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example one
As shown in fig. 1 and fig. 3, the present embodiment provides a ballastless track structure suitable for a micro track traffic ground line, which includes a base 1, ballastless track units, and a concrete structure.
The base 1 is of a reinforced concrete structure, concrete is poured after steel bars are bound, or a prefabricated reinforced concrete structure is adopted, and cast-in-place reinforced concrete is required to be effectively connected at the prefabricated connecting positions in blocks.
The ballastless track unit comprises a prefabricated sleeper slab 3 and two limiting blocks 6, wherein the prefabricated sleeper slab 3 is used for bearing and limiting a track and is arranged on the base 1, and a groove is reserved in the upper portion of the prefabricated sleeper slab 3 and used for placing a bottom structure of the groove-shaped steel rail 7. The groove is longitudinally continuous on the upper part of the prefabricated sleeper plate 3, and the bottom of the channel steel rail 7 is limited by the groove.
The two limiting blocks 6 are prefabricated by reinforced concrete, two sides of the groove-shaped steel rail 7 are respectively arranged, the groove-shaped steel rail 7 and the prefabricated sleeper slab 3 are laterally wrapped, in order to achieve good wrapping, the limiting blocks 6 need to be matched with the side faces of the groove-shaped steel rail 7, and therefore the two limiting blocks are different in structure; the limiting block 6 is attached to the upper surface and the side face of the prefabricated sleeper plate 3 and needs to extend downwards to be in contact with the base 1.
The concrete structure is cast on the side surface of the limiting block 6 in situ, and is respectively lapped with the limiting block 6 and the base 1 through reinforcing steel bars to form an integral structure. The concrete structure is formed by casting foam concrete in situ, the foam concrete is filled with the foam concrete on two side surfaces of the track structure after the limiting blocks 6 are installed, and the filling area is of a trapezoidal structure. The foam concrete trapezoid structure is filled, so that the effect of reducing noise is achieved while elastic adjustment is provided.
This embodiment has set up including prefabricated sleeper slab and two stopper ballastless track units, and the concrete is cast in situ in stopper 6 side to form overall structure through the reinforcing bar respectively with stopper 6 and 1 overlap joint of base, with cell type rail 7 and prefabricated sleeper slab 3 parcel in it, realized no fastener installation cell type rail 7, and can provide sufficient stability.
The matching surfaces of the groove-shaped steel rail 7, the limiting block 6 and the prefabricated sleeper plate 3 are coated with elastic spacer bushes made of synthetic fibers or rubber and used for absorbing high-frequency vibration generated by the rail. During construction, the limiting block can be mounted after the sheath is mounted on the limiting block 6 in advance.
The elastic sheath is arranged on two sides of the groove-shaped steel rail 7, and between the steel rail and the limiting block, the elastic sheath is fixed on the limiting block, so that elastic force is provided for the steel rail, the influence of vibration is reduced, the effect of absorbing noise is achieved, and the effect of replacing a fastener is achieved.
Application number that mentions in the background art is 201420801090X Chinese utility model patent, the prefab is all adopted in concrete track board and concrete rail bearing groove, cast in situ concrete articulamentum is established in clearance between the two, because cast in situ concrete intensity is little, place concrete rail bearing groove shop facility man-hour in the concrete track board top of laying, the articulamentum receives extrusion thickness and is difficult to control, cause the prefab bonding property between the two to be difficult to guarantee, easy fracture appears under the effect of train long-term impact load and vibration load, influence line operation normal use and driving smoothness and stability.
There is the articulamentum between prefabricated sleeper slab 3 of this embodiment and the base 1, is equipped with between prefabricated sleeper slab 3 and the base 1 and pours the bed course 2 that forms by cement asphalt mortar, has good adhesive property, in addition as elastic adjustment, plays leveling and cushioning effect to track structure. Although thickness is difficult to control, adhesive property is difficult to guarantee also can appear, but the structure of this embodiment is an overall structure, wraps up 2 parcels of bed course inside the structure, even the produced influence of adhesive property problem is not big to bed course itself has elasticity, can cushion the vibration. In addition, the elastic spacer 5 is arranged at the bottom and the side of the channel steel rail 7, so that not only can the buffer and the vibration damping be realized, but also a certain elastic movement space can be provided.
In other words, due to the integral limiting function of the track structure, the groove-shaped steel rail 7 and the prefabricated sleeper slab 3 can move in a certain space, but only in the safe and reasonable deformation range provided by the elastic material, the problems that the thickness of the connecting layer is difficult to control and the bonding performance is difficult to guarantee are indirectly solved while good vibration reduction is realized.
As shown in fig. 3, a plurality of vertical limiting grooves 11 are arranged on two sides of the prefabricated sleeper slab 3, and limiting piers 12 matched with the limiting grooves 11 are arranged on the base 1. The longitudinal and transverse displacement of the prefabricated sleeper slab is limited by the limiting action between the limiting groove 11 and the limiting pier stud 12 on the base 1. The limiting pier stud 12 is formed by pouring reinforced concrete and is integrally poured by being connected with the base 1, and the vertical fixing support and the horizontal constraint effect are achieved.
Example two
The embodiment provides a construction method of a ballastless track structure according to the first embodiment, which includes the following steps:
after a trapezoidal foundation pit for installing a ballastless track structure is excavated on a ground roadbed 9 (the roadbed is a road surface after normal construction and the following part), a reinforced concrete base 1 and a limiting pier stud 12 are poured, a cushion layer 2 poured by cement asphalt mortar is used for bonding and elastic adjustment, a prefabricated sleeper plate 3 is installed, alignment is carried out according to a limiting groove 11, an elastic sheath is installed on the side of the limiting groove 11 of the prefabricated sleeper plate 3 of the limiting pier stud 12, an elastic sheath 5 is installed at the bottom of a groove-shaped steel rail 7, the prefabricated sleeper plate 3 is installed and clamped at the limiting groove 11, a longitudinal seam 13 between the prefabricated slabs is filled by pouring foam concrete, the elastic sheaths 5 are installed on two sides of the groove-shaped steel rail 7 of a limiting block 6, foam concrete 4 is poured on two sides of the whole track structure and is respectively overlapped with the base 1 and the limiting block 6 through reserved steel bars, and finally a green layer 8 is laid on the upper part, so that the single-rail ballastless track structure is formed.
EXAMPLE III
As shown in fig. 2, the present embodiment provides a ballastless track structure suitable for a micro track traffic ground line, and is different from the first embodiment in that the track structure of the present embodiment is a double-track structure.
The ballastless track comprises two ballastless track units according to the first embodiment, and a transverse support beam 10 is arranged between the two ballastless track units.
The concrete structure is cast on the side surface of the limiting block 6 in a cast-in-place mode, and is respectively lapped with the limiting block 6 and the base 1 through reinforcing steel bars to form an integral structure. The concrete structure on the outer side is the same as the embodiment one, and the concrete structure on the inner side is arranged between the transverse supporting beam 10 and the base 1, and the steel bars are required to be lapped.
The transverse support beams 10 are spaced longitudinally along the track. In order to prefabricate the reinforced concrete structure, after the site installation and positioning, foam concrete is poured, the transverse supporting beams 10 play a role in strengthening the rigidity of the transverse supporting structure, and the longitudinal placement intervals are selected according to actual needs.
Example four
The embodiment provides a construction method of a ballastless track structure according to the third embodiment, which includes the following steps:
after a trapezoidal foundation pit for installing a ballastless track structure is excavated on a ground roadbed 9, a reinforced concrete base 1 is poured, a cushion layer 2 poured by cement asphalt mortar is used for bonding and elastic adjustment, then a prefabricated sleeper plate 3 is installed and is aligned according to a limiting groove 11, an elastic sheath is installed on the side of the limiting groove 11 of the prefabricated sleeper plate 3 of a limiting pier 12, an elastic sheath 5 is installed at the bottom of a groove-shaped steel track 7, the prefabricated sleeper plate 3 is installed and clamped at the limiting groove 11, the elastic sheaths 5 are installed on two sides of the groove-shaped steel track 7 of the limiting block 6, foam concrete 4 is poured on two sides of the track structure, foam concrete 4 is sequentially poured between the two track structures, a transverse supporting beam 10 is placed, the foam concrete 4 is poured, and finally a asphalt layer 8 is laid on the upper portion of the two track structures to form a double-rail ballastless track structure.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (10)
1. The utility model provides a ballastless track structure suitable for miniature track traffic ground line which characterized in that includes:
a base;
the ballastless track unit comprises a prefabricated sleeper plate and is arranged on the base, and a groove is reserved in the upper part of the prefabricated sleeper plate and is used for placing a bottom structure of the groove-shaped steel rail; the two limiting blocks are respectively arranged on two sides of the groove-shaped steel rail and laterally wrap the groove-shaped steel rail and the prefabricated sleeper slab;
and the concrete structure is cast on the side surface of the limiting block in a cast-in-place mode, and is respectively lapped with the limiting block and the base through reinforcing steel bars to form an integral structure.
2. The utility model provides a ballastless track structure suitable for miniature track traffic ground line which characterized in that includes:
a base;
the ballastless track unit of claim 1, wherein a transverse support beam is arranged between the ballastless track units;
and the concrete structure is cast on the side surface of the limiting block in a cast-in-place mode, and is respectively lapped with the limiting block and the base through reinforcing steel bars to form an integral structure.
3. The ballastless track structure suitable for a mini track traffic ground line according to claim 1 or 2, wherein the matching surfaces of the groove-shaped steel rail, the limiting block and the precast sleeper slab are coated with elastic spacer bushes.
4. The ballastless track structure suitable for a micro track traffic ground line according to claim 1 or 2, wherein a cushion layer poured by cement asphalt mortar is arranged between the precast sleeper slab and the base.
5. The ballastless track structure suitable for the micro track traffic ground line according to claim 1 or 2, wherein a plurality of limiting grooves are formed on two sides of the prefabricated sleeper slab, and limiting piers matched with the limiting grooves are arranged on the base.
6. The ballastless track structure of claim 1 or 2, wherein the concrete structure is cast in place of the foamed concrete.
7. The ballastless track structure of claim 2, wherein the transverse support beams are arranged at intervals along the longitudinal direction of the track.
8. The ballastless track structure of claim 2, wherein the concrete structure is disposed between the transverse support beam and the base.
9. The construction method of the ballastless track structure of claim 1, comprising the steps of:
excavating a trapezoidal foundation pit for installing a ballastless track structure on a ground roadbed, pouring a reinforced concrete base, assembling a prefabricated sleeper slab, a groove-shaped steel rail and a limiting block, pouring concrete on two sides of the whole track structure, and respectively overlapping the concrete with the base and the limiting block through reserved steel bars to form a single-track ballastless track structure.
10. The construction method of the ballastless track structure of claim 2, comprising the steps of:
excavating a trapezoidal foundation pit for installing a ballastless track structure on a ground roadbed, pouring a reinforced concrete base, installing a prefabricated sleeper slab, respectively assembling the prefabricated sleeper slab, a groove-shaped steel rail and a limiting block to form two ballastless track units, pouring concrete on two sides of the whole track structure, sequentially pouring concrete between the two ballastless track units, laying a transverse supporting beam and pouring concrete to form the double-track ballastless track structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211454990.7A CN115748312A (en) | 2022-11-21 | 2022-11-21 | Ballastless track structure and method suitable for micro track traffic ground line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211454990.7A CN115748312A (en) | 2022-11-21 | 2022-11-21 | Ballastless track structure and method suitable for micro track traffic ground line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115748312A true CN115748312A (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211454990.7A Pending CN115748312A (en) | 2022-11-21 | 2022-11-21 | Ballastless track structure and method suitable for micro track traffic ground line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115748312A (en) |
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2022
- 2022-11-21 CN CN202211454990.7A patent/CN115748312A/en active Pending
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