阅读说明：本技术 板式无砟轨道结构 (Plate type ballastless track structure ) 是由 江成 王继军 刘伟斌 李巍 刘海涛 田四明 巩江峰 赵磊 李建强 杜香刚 尤瑞林 于 2021-09-13 设计创作，主要内容包括：本发明提供了一种板式无砟轨道结构。板式无砟轨道结构包括：预制轨道板,预制轨道板沿其平面纵向中心线间隔设置多个限位孔,至少一个限位孔设置在预制轨道板的中心位置；自密实混凝土层,自密实混凝土层位于预制轨道板的下方并通过限位孔灌注成型,自密实混凝土层具有限位结构,限位结构伸入限位孔内；隔离层,预制轨道板与自密实混凝土层之间设置有隔离层；弹性缓冲垫层,限位孔的周侧设置有弹性缓冲垫层。本发明解决了现有技术中的无砟轨道结构存在限位结构易损伤、水泥沥青砂浆耐久性差、轨道板或道床板翘曲变形的问题。(The invention provides a plate-type ballastless track structure. The plate-type ballastless track structure comprises: the prefabricated track slab is provided with a plurality of limiting holes at intervals along the longitudinal center line of the plane of the prefabricated track slab, and at least one limiting hole is arranged in the center of the prefabricated track slab; the self-compacting concrete layer is positioned below the prefabricated track slab and is poured and molded through the limiting hole, and the self-compacting concrete layer is provided with a limiting structure which extends into the limiting hole; the isolating layer is arranged between the prefabricated track slab and the self-compacting concrete layer; the elastic cushion layer is arranged on the periphery of the limiting hole. The invention solves the problems that the ballastless track structure in the prior art is easy to damage the limiting structure, the cement asphalt mortar has poor durability, and the track slab or the track bed slab is warped and deformed.)

1. The utility model provides a slab ballastless track structure which characterized in that includes:

the prefabricated track plate (10) is provided with a plurality of limiting holes (11) at intervals along a plane longitudinal center line (50) of the prefabricated track plate (10), and at least one limiting hole (11) is arranged at the center of the prefabricated track plate (10);

the self-compacting concrete layer (20) is located below the prefabricated track slab (10) and is poured and molded through the limiting hole (11), the self-compacting concrete layer (20) is provided with a limiting structure (21), and the limiting structure (21) extends into the limiting hole (11);

the isolation layer (30) is arranged between the prefabricated track slab (10) and the self-compacting concrete layer (20);

the elastic buffer cushion layer (40) is arranged on the peripheral side of the limiting hole (11).

2. The slab ballastless track structure of claim 1, wherein the number of the limiting holes (11) is three, and at least two limiting holes (11) are correspondingly formed at both ends of the prefabricated track slab (10).

3. The slab ballastless track structure of claim 2,

the two limiting holes (11) positioned at the two end parts are communicated with the edge of the prefabricated track plate (10); or

The two limiting holes (11) positioned at the two end parts are arranged at intervals with the edge of the prefabricated track plate (10).

4. The slab ballastless track structure of claim 1,

the hole section of the limiting hole (11) is rectangular; and/or

The aperture of the limiting hole (11) is gradually reduced from top to bottom.

5. The slab ballastless track structure of claim 1, wherein the prefabricated track slab (10) has fine tuning holes (60) on both sides thereof, the fine tuning holes (60) are symmetrically arranged along the plane longitudinal center line (50), and the number of the fine tuning holes (60) is 4 or 6.

6. The slab ballastless track structure of claim 1,

the isolation layer (30) is a prefabricated rubber layer or a prefabricated polyurethane layer;

the static modulus of the isolation layer (30) is not more than 0.6N/mm³。

7. The slab ballastless track structure of claim 1, wherein a side surface of the insulation layer (30) facing the precast track slab (10) has a pattern structure.

8. The slab ballastless track structure of claim 1, wherein a side surface of the elastic cushion layer (40) facing the inside of the limiting hole (11) is provided with a plurality of limiting protrusions (41), and the plurality of limiting protrusions (41) are arranged at intervals in a direction perpendicular to the longitudinal center line (50) of the plane.

Technical Field

The invention relates to the technical field of rail traffic engineering equipment, in particular to a plate-type ballastless track structure.

Background

China's high speed railway or intercity railway mainly adopts CRTS I, CRTS II, CRTS III plate type track and double-block ballastless track. In the long-term operation process, the 4 kinds of ballastless tracks have damage phenomena of different degrees, for example, the limit structure of the CRTS I type slab ballastless track at the large-span beam end has damage, the CRTS II type slab track has track slab upwarp deformation and causes concrete damage at the joint of adjacent track slabs, and the double-slab ballastless track bed slab cracks and upwarps and deforms; the cement emulsified asphalt mortar is affected by temperature change, freeze thawing, train fatigue load, rain erosion and the like, and has the diseases of cracking, crack opening, slurry turning, mud pumping and the like. In addition, the 4 kinds of ballastless tracks are influenced by temperature change, and the track slab/track bed slab is deformed to different degrees, so that the smoothness of the line is influenced.

That is to say, the ballastless track structure in the prior art has the problems that the limiting structure is easy to damage, the cement asphalt mortar has poor durability, and the track slab or the track bed slab is warped and deformed.

Disclosure of Invention

The invention mainly aims to provide a plate-type ballastless track structure, which is used for solving the problems that a limiting structure of the ballastless track structure in the prior art is easy to damage, cement asphalt mortar is poor in durability, and a track plate or a track bed plate is warped and deformed.

In order to achieve the above object, the present invention provides a slab ballastless track structure, including: the prefabricated track slab is provided with a plurality of limiting holes at intervals along the longitudinal center line of the plane of the prefabricated track slab, and at least one limiting hole is arranged in the center of the prefabricated track slab; the self-compacting concrete layer is positioned below the prefabricated track slab and is poured and molded through the limiting hole, and the self-compacting concrete layer is provided with a limiting structure which extends into the limiting hole; the isolating layer is arranged between the prefabricated track slab and the self-compacting concrete layer; the elastic cushion layer is arranged on the periphery of the limiting hole.

Furthermore, the number of the limiting holes is three, and at least two limiting holes are correspondingly arranged at two end parts of the prefabricated track plate.

Furthermore, two limiting holes positioned at the two end parts are communicated with the edge of the prefabricated track slab; or two limiting holes positioned at the two end parts are arranged at intervals with the edge of the prefabricated track plate.

Furthermore, the cross section of the limiting hole is rectangular; and/or the aperture of the limiting hole is gradually reduced from top to bottom.

Furthermore, the two sides of the prefabricated track slab are provided with fine adjustment holes which are symmetrically arranged along the longitudinal central line of the plane, and the number of the fine adjustment holes is 4 or 6.

Further, the isolation layer is a prefabricated rubber layer or a prefabricated polyurethane layer; the static modulus of the isolation layer is not more than 0.6N/mm³。

Furthermore, the surface of one side of the isolation layer facing the prefabricated track slab is provided with a pattern structure.

Furthermore, the elastic cushion layer is provided with a plurality of limiting bulges facing to one side surface of the interior of the limiting hole, and the plurality of limiting bulges are arranged at intervals along the direction perpendicular to the longitudinal center line of the plane.

By applying the technical scheme of the invention, the slab ballastless track structure comprises a prefabricated track slab, a self-compacting concrete layer, an isolation layer and an elastic buffer cushion layer, wherein the prefabricated track slab is provided with a plurality of limiting holes at intervals along the longitudinal center line of the plane of the prefabricated track slab, and at least one limiting hole is arranged at the center of the prefabricated track slab; the self-compacting concrete layer is positioned below the prefabricated track slab and is poured and molded through the limiting hole, the self-compacting concrete layer is provided with a limiting structure, and the limiting structure extends into the limiting hole; an isolation layer is arranged between the prefabricated track slab and the self-compacting concrete layer; an elastic cushion layer is arranged on the periphery of the limiting hole.

Through setting up a plurality of spacing holes at prefabricated track board along its plane longitudinal center line interval, at least one spacing hole sets up the central point of putting at prefabricated track board, make and form a plurality of limit structure after the spacing hole that is located central point department of putting pours into self-compaction concrete, can make the vertical and horizontal spacing ability of plate-type ballastless track structure promote greatly, guarantee plate-type ballastless track structure's stability, avoided the appearance of CRTS I plate-type track at large-span beam-ends limit structure damage phenomenon. In addition, the limiting structure formed by the self-compacting concrete stretches into the limiting hole, the limiting structure can inhibit the warping deformation of the prefabricated track slab caused by the temperature gradient, and the limiting holes are multiple, so that the limiting structure is correspondingly arranged in each limiting hole, the supporting uniformity of the prefabricated track slab is ensured, and the smoothness of the circuit is improved.

In addition, through being provided with the isolation layer between prefabricated track board and self-compaction concrete layer for prefabricated track board and self-compaction concrete layer separation can be raised prefabricated track board and isolation layer jointly when great vertical deformation appears in the basis under the line, pours polymer mortar or resin mortar again and makes it firmly bond with self-compaction concrete layer, has realized because the basis warp the quick treatment of the disease that arouses, also can provide convenient condition for because the change after the prefabricated track board became invalid. Through being provided with the elasticity cushion layer in the week side in spacing hole, because elasticity cushion layer can moderate degree warp, can cushion because the interaction force between limit structure and the prefabricated track board that train load, temperature variation, foundation warp etc. arouse, provide convenient condition for prefabricated track board elevation adjustment, prefabricated track board change etc. simultaneously.

The invention greatly improves the limiting capacity of the slab ballastless track structure, inhibits the buckling deformation of the prefabricated track slab, improves the deformation adjustment capacity, reduces the field operation procedures and workload, and improves the construction efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a slab ballastless track structure according to an alternative embodiment of the present invention;

fig. 2 shows a schematic cross-sectional view of the slab ballastless track structure of fig. 1 along a direction perpendicular to the track extension direction;

fig. 3 shows a schematic cross-sectional view of the slab ballastless track structure in fig. 1 along the track extension direction;

fig. 4 shows a partially enlarged schematic view of the slab ballastless track structure of fig. 3;

fig. 5 shows a schematic structural diagram of a slab ballastless track structure according to another alternative embodiment of the invention.

Wherein the figures include the following reference numerals:

10. prefabricating a track slab; 11. a limiting hole; 20. a self-compacting concrete layer; 21. a limiting structure; 30. an isolation layer; 40. an elastic cushion layer; 41. a limiting bulge; 50. a planar longitudinal centerline; 60. fine adjustment of the holes; 70. a steel rail; 80. a fastener.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

The invention provides a plate-type ballastless track structure, aiming at solving the problems that a limit structure of the ballastless track structure in the prior art is easy to damage, the cement asphalt mortar has poor durability, and a track plate or a track bed plate is warped and deformed.

As shown in fig. 1 to 5, the slab ballastless track structure includes a prefabricated track slab 10, a self-compacting concrete layer 20, an isolation layer 30 and an elastic cushion layer 40, wherein the prefabricated track slab 10 is provided with a plurality of limiting holes 11 at intervals along a longitudinal center line 50 of a plane thereof, and at least one limiting hole 11 is arranged at a central position of the prefabricated track slab 10; the self-compacting concrete layer 20 is positioned below the prefabricated track slab 10 and is poured and molded through the limiting hole 11, the self-compacting concrete layer 20 is provided with a limiting structure 21, and the limiting structure 21 extends into the limiting hole 11; an isolation layer 30 is arranged between the prefabricated track slab 10 and the self-compacting concrete layer 20; an elastic cushion layer 40 is provided on the peripheral side of the stopper hole 11.

Through setting up a plurality of spacing holes 11 at prefabricated track board 10 along its plane longitudinal center line 50 intervals, at least one spacing hole 11 sets up the central point that puts at prefabricated track board 10, make and form a plurality of limit structure 21 after pouring the self-compaction concrete by the spacing hole 11 that is located central point department of putting, can make the vertical and horizontal spacing ability of plate-type ballastless track structure promote greatly, guarantee plate-type ballastless track structure's stability, the appearance of CRTS I plate-type track at large-span beam-ends limit structure 21 damage phenomenon has been avoided. In addition, self-compaction concrete layer 20 has limit structure 21, and limit structure 21 stretches into spacing hole 11, sets up like this and makes limit structure 21 can restrain the warpage deformation of prefabricated track board 10 that temperature gradient arouses, because spacing hole 11 is a plurality of, all corresponds in every spacing hole 11 and is provided with limit structure 21, has just so guaranteed the homogeneity that prefabricated track board 10 supported, has improved the ride comfort of circuit.

In addition, through being provided with isolation layer 30 between prefabricated track board 10 and self-compaction concrete layer 20 for prefabricated track board 10 separates with self-compaction concrete layer 20, can raise prefabricated track board 10 and isolation layer 30 jointly when great vertical deformation appears in the basis under the line, pour polymer mortar or resin mortar again and make it firmly bond with self-compaction concrete layer 20, realized because the quick treatment of the disease that basic deformation arouses, equally also can provide convenient condition for because the change after prefabricated track board 10 became invalid. By arranging the elastic buffer cushion layer 40 on the peripheral side of the limiting hole 11, the elastic buffer cushion layer 40 can deform moderately, so that the interaction force between the limiting structure 21 and the prefabricated track slab 10 caused by train load, temperature change, foundation deformation and the like can be buffered, and convenience is provided for elevation adjustment of the prefabricated track slab 10, replacement of the prefabricated track slab 10 and the like.

The invention greatly improves the limiting capacity of the slab ballastless track structure, inhibits the buckling deformation of the prefabricated track slab 10, improves the deformation adjustment capacity, reduces the field operation procedures and workload, and improves the construction efficiency.

The elastic cushion layer 40 is attached to the inner hole wall of the stopper hole 11.

In addition, the prefabricated track plate 10, the isolation layer 30 and the elastic cushion layer 40 are partially or completely prefabricated and assembled into a whole in a factory, so that the prefabrication rate and the assembly rate of the plate-type ballastless track structure can be further improved, and the quality of the plate-type ballastless track structure entity and the field construction efficiency are improved.

Specifically, the number of the limiting holes 11 is three, and at least two limiting holes 11 are correspondingly arranged at two end portions of the prefabricated track slab 10. Set up like this and make and form three limit structure 21 after pouring self-compaction concrete through the spacing hole 11 that is located central point and put to promote the spacing ability of board-like ballastless track structure in horizontal and vertical ascending, avoided limit structure 21 to pull the condition of splitting damage simultaneously, guaranteed board-like ballastless track's stability. Two spacing holes 11 of tip have guaranteed the closely knit nature of pouring as exhaust hole and observation hole when pouring the self-compaction concrete, and two spacing holes 11 of tip also form limit structure 21 after the self-compaction concrete is poured and is accomplished. In addition, the middle part of the prefabricated track slab 10 is provided with a limiting hole 11, and a limiting structure 21 with a large upper part and a small lower part is formed in the middle part of the prefabricated track slab 10 after self-compacting concrete is poured, so that the upward warping deformation of the prefabricated track slab 10 caused by positive temperature gradient can be inhibited; the two limiting holes 11 arranged at the end parts of the prefabricated track plate 10 can also form a limiting structure 21 with a large upper part and a small lower part, so that the upward warping deformation of the prefabricated track plate 10 caused by negative temperature gradient can be inhibited; through the arrangement of the 3 limiting structures 21, the supporting uniformity of the prefabricated track slab 10 is ensured, and the smoothness of the line is improved.

As shown in fig. 1, two spacing holes 11 that are located two tip communicate with the edge of prefabricated track board 10, just so strengthened the exhaust function of the spacing hole 11 of tip, carry out the in-process that fills from spacing hole 11 of the central point department of prefabricated track board 10 at self-compacting concrete, gaseous can be followed spacing hole 11 and discharged, the fashioned compactedness in self-compacting concrete layer 20 has been guaranteed, form self-compacting concrete layer 20 and limit structure 21 after self-compacting concrete fills, self-compacting concrete layer 20 forms the curve ultrastructure in curve section simultaneously, construction deviation has been eliminated, the use on cement asphalt mortar layer has been cancelled, plate-type ballastless track structure whole durability and efficiency of construction have been improved.

It should be noted that the self-compacting concrete layer 20 forms a curved super-high structure in a curved section, that is, the super-high of the curved section is formed on the self-compacting concrete layer 20.

In another embodiment shown in fig. 5, two limiting holes 11 at both ends are spaced apart from the edge of the prefabricated rail plate 10. The exhaust function of two spacing holes 11 that set up like this and can guarantee to be located two tip guarantees the fashioned closely knit nature of self-compaction concrete layer 20.

Specifically, the hole cross-section of spacing hole 11 is the rectangle, can select according to actual need, and in this application, the hole cross-section of spacing hole 11 is the rectangle, and is concrete, is the rectangle that the four corners is the fillet, and the spacing hole 11 of rectangle can guarantee elastic cushion layer atress homogeneity. The aperture of the limiting hole 11 is gradually reduced from top to bottom, so that the limiting structure 21 formed after the self-compacting concrete is poured is also gradually reduced from top to bottom, namely the limiting structure 21 with a large top and a small bottom is formed, so that the upward warping deformation of the prefabricated track slab 10 caused by the positive temperature gradient can be effectively prevented, the smoothness of the circuit is improved, and the demolding is facilitated when the prefabricated track slab 10 is manufactured.

It should be noted that the limiting structure 21 is integrally formed with the self-compacting concrete layer 20.

As shown in fig. 1 and 5, the prefabricated track slab 10 has fine adjustment holes 60 at both sides thereof, the fine adjustment holes 60 are symmetrically disposed along the planar longitudinal center line 50, and the number of the fine adjustment holes 60 is 4 or 6. It should be noted that different numbers of fine tuning holes 60 may be provided according to the length of the prefabricated track slab 10, when the prefabricated track slab 10 is a short slab, four fine tuning holes 60 are provided, and two fine tuning holes 60 are respectively provided on two sides of the prefabricated track slab 10 in the same direction as the track extension direction; when the prefabricated rail plate 10 is a long plate, the number of the fine adjustment holes 60 is six.

When the ballastless track has lower foundation settlement or upwarps, the prefabricated track slab 10 is supported by the three-way adjusting jack, the elastic buffer layer 40 around the limiting hole 11 is partially or completely removed, the prefabricated track slab 10 is supported by the jack, the prefabricated track slab 10 is separated from the self-compacting concrete layer 20, and the height adjustment of the prefabricated track slab 10 is carried out by pouring polymer mortar or resin mortar, so that the maintenance of a specific structure below the prefabricated track slab 10 is realized.

In particular, the barrier layer30 is a preformed rubber layer or a preformed polyurethane layer, and the static modulus of the isolating layer 30 is not more than 0.6N/mm³This arrangement ensures the elasticity of the barrier layer 30. Through setting up isolation layer 30, can make and separate between self-compaction concrete layer 20 and the prefabricated track board 10, be convenient for lower part basis subsides or the maintenance of carrying out prefabricated track board 10 after encircleing.

Specifically, the surface of the isolation layer 30 facing the prefabricated track slab 10 is embossed to form a pattern structure. The bonding strength of the isolation layer 30 and the prefabricated track slab 10 is increased, the prefabricated track slab 10 and the isolation layer 30 can be lifted together when the off-line foundation is subjected to large vertical deformation, the polymer mortar or the resin mortar is poured again, and the polymer mortar or the resin mortar is firmly bonded with the self-compacting concrete layer 20, so that the rapid treatment of diseases caused by foundation deformation is realized, and convenience is provided for replacement of the track slab after failure.

In the embodiment shown in fig. 4, a side surface of the elastic cushion 40 facing the inside of the stopper hole 11 has a plurality of stopper protrusions 41, and the plurality of stopper protrusions 41 are spaced apart from each other in a direction perpendicular to the longitudinal center line 50 of the plane. Elastic cushion layer 40 sets up spacing arch 41 towards one side surface of spacing hole 11 inside, can strengthen being connected between prefabricated track board 10 and the elastic cushion layer 40, guarantees connection stability, can prevent the vertical play of elastic cushion layer 40 simultaneously, has guaranteed the stability of elastic cushion layer 40 assembly.

Specifically, the thickness of the elastic cushion layer 40 is 5 mm or more. The risk that the limiting structure 21 is damaged when the elevation of the prefabricated track slab 10 is lifted or lowered can be avoided by the arrangement, and meanwhile, convenience is provided for other maintenance work such as replacement of the prefabricated track slab 10.

As shown in fig. 3, the slab ballastless track structure further includes a steel rail 70 and a fastener 80, the steel rail 70 and the fastener 80 are both disposed on one side of the prefabricated track slab 10 far away from the self-compacting concrete layer 20, and the fastener 80 is disposed between the steel rail 70 and the prefabricated track slab 10.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. the limiting capacity of the slab ballastless track structure is greatly improved, and the buckling deformation of the prefabricated track slab is inhibited.

2. The deformation adjusting capability of the plate-type ballastless track structure is improved, the field operation procedures and the workload are reduced, and the construction efficiency is improved.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.