阅读说明：本技术 Crtsⅲ型板式无砟轨道 (CRTS III plate type ballastless track ) 是由 李秋义 韦合导 朱应娟 李路遥 刘慧芳 马弯 于 2020-11-25 设计创作，主要内容包括：本发明提供了一种CRTSⅢ型板式无砟轨道,包括底座、轨道板、加强筋及填充层,填充层为向轨道板与底座之间灌注自密实混凝土而成,轨道板上形成有通孔,通孔内形成有填充层,加强筋埋设于轨道板与底座之间的填充层内；CRTSⅢ型板式无砟轨道还包括连接件,通孔内设置有连接件,连接件的一端固定于通孔的内壁上,另一端与加强筋连接。该CRTSⅢ型板式无砟轨道在通孔内埋设连接件,使连接件将通孔内的填充层与加强筋连接,保证板式无砟轨道的通孔内填充层的结构稳定,以避免因为温度荷载及列车荷载等多因素的影响而造成自密实混凝土蹿出,影响行车安全。(The invention provides a CRTS III plate type ballastless track, which comprises a base, a track plate, a reinforcing rib and a filling layer, wherein the filling layer is formed by pouring self-compacting concrete between the track plate and the base; the CRTS III type plate ballastless track further comprises a connecting piece, the connecting piece is arranged in the through hole, one end of the connecting piece is fixed on the inner wall of the through hole, and the other end of the connecting piece is connected with the reinforcing rib. The connecting piece is buried underground in the through-hole in this III plate-type ballastless track of CRTS, makes the filling layer and the strengthening rib in the connecting piece is connected with the through-hole, guarantees the stable in structure of filling layer in plate-type ballastless track's the through-hole to avoid causing the self-compaction concrete to leap out because of the influence of multifactor such as temperature load and train load, influence driving safety.)

1. The utility model provides a III plate-type ballastless tracks of CRTS which characterized in that: the track plate comprises a base, a track plate, a reinforcing rib and a filling layer, wherein the filling layer is formed by pouring self-compacting concrete between the track plate and the base;

the CRTS III type plate ballastless track further comprises a connecting piece, the connecting piece is arranged in the through hole, one end of the connecting piece is fixed on the inner wall of the through hole, and the other end of the connecting piece is connected with the reinforcing rib.

2. The CRTS III type plate ballastless track of claim 1, wherein the through hole is tapered, and one end of the connecting piece is clamped on the inner wall of the through hole.

3. The CRTS III type slab ballastless track of claim 1, wherein the connecting member comprises a first sub-member and a second sub-member, two ends of the first sub-member are respectively fixed on the inner wall of the through hole, a first end of the second sub-member is connected with the first sub-member, and a second end of the second sub-member is connected with the reinforcing rib.

4. The CRTS III slab ballastless track of claim 3, wherein the first sub-member is horizontally fixed in the through hole; and/or

The number of the first sub-parts is multiple, and the first sub-parts are connected with each other.

5. The CRTS III slab ballastless track of claim 3, wherein the second sub-piece is disposed perpendicular to the first sub-piece; and/or

And a hook-shaped structure is formed at the second end of the second sub-piece and is hooked on the reinforcing rib.

6. The CRTS III type plate ballastless track of claim 3, wherein the first end of the second sub-piece is welded to both sides of the first sub-piece, the length of the weld is 30mm to 60mm, and the width of the weld is greater than or equal to 4 mm.

7. The CRTS III type plate ballastless track of any one of claims 1-6, wherein the through hole is a pouring hole, and the filling layer is formed by pouring self-compacting concrete between the track plate and the base from the pouring hole.

8. The CRTS III slab ballastless track of any one of claims 1-6, wherein the through hole is an inspection hole, and the filling layer is formed in the inspection hole.

9. The CRTS III type plate ballastless track of any one of claims 1-6, wherein the reinforcing ribs are net-shaped and horizontally embedded in the filling layer.

Technical Field

The invention relates to the technical field of ballastless tracks, in particular to a CRTS III plate type ballastless track.

Background

The CRTS III plate type ballastless track adopts a unit block type structure, and a disconnected block type structure is adopted between track plates of a roadbed and a bridge section. The track slab of the CRTS III slab ballastless track is prefabricated in an industrial mode, and self-compacting concrete is poured into the track slab through a pouring hole in the track slab to achieve connection with a base structure. During construction, firstly, the track slab is paved and finely adjusted to a design position, then self-compacting concrete is poured, and after the self-compacting concrete flows and fills a slab cavity, slurry can overflow from a pouring hole and an inspection hole; in addition, due to the action of multiple factors such as temperature load or train load, self-compacting concrete in the pouring hole or the inspection hole can jump out, and driving safety is affected.

Disclosure of Invention

The invention provides a CRTS III slab ballastless track, which aims to solve the technical problem that self-compacting concrete in a pouring hole or an inspection hole of the CRTS III slab ballastless track in the prior art leaps out.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the invention provides a CRTS III plate type ballastless track which comprises a base, a track plate, a reinforcing rib and a filling layer, wherein the filling layer is formed by pouring self-compacting concrete between the track plate and the base; the CRTS III type plate ballastless track further comprises a connecting piece, the connecting piece is arranged in the through hole, one end of the connecting piece is fixed on the inner wall of the through hole, and the other end of the connecting piece is connected with the reinforcing rib.

Furthermore, the through hole is conical, and one end of the connecting piece is clamped on the inner wall of the through hole.

Furthermore, the connecting piece comprises a first sub piece and a second sub piece, two ends of the first sub piece are respectively fixed on the inner wall of the through hole, the first end of the second sub piece is connected with the first sub piece, and the second end of the second sub piece is connected with the reinforcing rib.

Further, the first sub-piece is horizontally fixed in the through hole; and/or the number of the first sub-parts is multiple, and the multiple first sub-parts are connected with each other.

Further, the second sub-piece is arranged perpendicular to the first sub-piece; and/or the second end of the second sub-piece is provided with a hook-shaped structure which is hooked on the reinforcing rib.

Furthermore, the first end of the second sub-piece is welded with the first sub-piece in a double-sided mode, the length of a welding line is 30 mm-60 mm, and the width of the welding line is larger than or equal to 4 mm.

Furthermore, the through-hole is the filling hole, the filling layer is followed the filling hole to track board with it forms to pour into self-compaction concrete between the base.

Further, the through hole is an inspection hole, and the filling layer is formed in the inspection hole.

Furthermore, the reinforcing ribs are net-shaped, and the reinforcing ribs are horizontally embedded in the filling layer.

According to the CRTS III plate type ballastless track provided by the invention, the filling layer is arranged between the track plate and the base, the filling layer is also formed in the through hole of the track plate, and the reinforcing rib is embedded in the filling layer between the track plate and the base; the connecting pieces are embedded in the through holes, so that the filling layers in the through holes are connected with the reinforcing ribs through the connecting pieces, the stable structure of the filling layers in the through holes of the plate-type ballastless tracks is guaranteed, and the phenomenon that the self-compacting concrete leaps out due to the influence of multiple factors such as temperature load and train load and the like to influence the driving safety is avoided.

Drawings

Fig. 1 is a schematic cross-sectional structure view of a CRTS iii slab ballastless track provided in an embodiment of the present invention;

fig. 2 is a cross-sectional view of the irrigation hole shown in fig. 1.

Description of reference numerals:

10. a base; 20. a track plate; 21. a perfusion hole; 30. a connecting member; 31. a first sub-piece; 32. a second sub-piece; 40. a filling layer; 50. and (5) reinforcing ribs.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number or order of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Referring to fig. 1 to 2, an embodiment of the present application provides a CRTS iii-type slab ballastless track, including a base 10, a track slab 20, a reinforcing rib 50, and a filling layer 40, where the filling layer 40 is formed by pouring self-compacting concrete between the track slab 20 and the base 10, a through hole is formed on the track slab 20, the filling layer 40 is formed in the through hole, and the reinforcing rib 50 is embedded in the filling layer 40 between the track slab 20 and the base 10; the CRTS III type plate ballastless track further comprises a connecting piece 30, the connecting piece 30 is arranged in the through hole, one end of the connecting piece 30 is fixed on the inner wall of the through hole, and the other end of the connecting piece 30 is connected with the reinforcing rib 50.

In the construction process of the CRTS III slab ballastless track, firstly, the track slab 20 is laid at a designed position, then the self-compacting concrete is poured between the track slab 20 and the base 10, and after the self-compacting concrete flows and is filled in a cavity between the track slab 20 and the base 10, the self-compacting concrete can overflow from a through hole of the track slab 20, so that a filling layer 40 is also formed in the through hole. In the embodiment of the present application, the through hole may be a pouring hole 21, an inspection hole or other holes on the track plate 20. In order to reinforce the strength of the filling layer 40 and ensure its structural stability and durability, reinforcing ribs 50 are laid in the filling layer 40. In the embodiment of the present application, the reinforcing rib 50 may be a plurality of single reinforcing bars arranged at intervals, or may be a reinforcing mesh.

In addition, the filling layer 40 in the through hole is not connected with the filling layer 40 at the lower part, and under the influence of factors such as temperature load and train load, the filling layer 40 in the through hole may jump out, which affects driving safety. The lower filling layer 40 is the filling layer 40 between the track plate 20 and the base 10. In the embodiment of the present application, the connecting member 30 is disposed in the through hole, and one end of the connecting member is fixed to the inner wall of the through hole, and the other end of the connecting member is connected to the reinforcing rib 50, so as to ensure the structural stability of the filling layer 40 in the through hole of the track slab 20 and ensure the driving safety.

In the embodiment of the present application, the connecting member 30 is a steel bar. One end of the connecting piece 30 is fixed on the inner wall of the through hole, and after the self-compacting concrete is poured, the connecting piece 30 can enhance the stability of the filling layer 40 in the through hole. The other end of the connector 30 is connected to the reinforcing rib 50, so that the structural stability between the through-hole filling layer 40 and the lower filling layer 40 can be enhanced, and the through-hole filling layer 40 and the lower filling layer 40 are prevented from being connected, broken and leaped out.

It can be understood that the fixing between the upper end of the connecting member 30 and the inner wall of the through hole may be a single-point fixing or a multi-point fixing; the fastening between the connecting element 30 and the inner wall of the through hole can also be made in various ways. In some embodiments, the through hole is tapered, and one end of the connecting member 30 is engaged with an inner wall of the through hole. That is, the through hole has a shape with a wide top and a narrow bottom, the upper end of the connecting member 30 is fixed to the inner wall of the through hole at multiple points, and the upper end is clamped on the inner wall of the through hole, so as to ensure the stability of the filling layer 40 in the through hole by the fixing effect of the inner wall of the through hole.

It is understood that the connecting member 30 may be a unitary structure or a split structure connected to each other, and both can achieve the connection between the filling layer 40 in the through hole and the lower filling layer 40. In some embodiments, the connecting member 30 includes a first sub member 31 and a second sub member 32, both ends of the first sub member 31 are fixed to the inner wall of the through hole, respectively, a first end of the second sub member 32 is connected to the first sub member 31, and a second end of the second sub member 32 is connected to the reinforcing rib 50. Specifically, the first sub-member 31 is a transverse steel bar, the second sub-member 32 is a vertical steel bar, and the top end of the vertical steel bar is welded with the transverse steel bar. The length of horizontal reinforcing bar needs to guarantee that it can block when the construction and establish on the inner wall of through-hole, guarantees to pour the in-process of self-compaction concrete, and the position of horizontal reinforcing bar can not take place the disturbance. The length of the vertical bars needs to be such that their lower ends are connected to the reinforcing bars 50. The stability of filling layer 40 in the through-hole can be strengthened to horizontal reinforcing bar, and vertical reinforcing bar can strengthen the structural stability between filling layer 40 and the lower part filling layer 40 in the through-hole. Specifically, the first end of the second sub-part 32 is welded with the first sub-part 31 on two sides, the length of the welding seam is 30 mm-60 mm, and the width of the welding seam is greater than or equal to 4 mm. In some embodiments, the second end of the second sub-member 32 is formed with a hook-like structure that is hooked to the stiffener 50. It will be appreciated that the hook-like formation further enhances the connection between the second sub-member 32 and the reinforcing ribs 50, making the connection between the two more robust, thereby enhancing the stability and durability of the filling layer 40 within the through-hole.

In some embodiments, the number of the first sub-members 31 is plural, and the plural first sub-members 31 are connected to each other. It can be understood that both ends of the first sub-member 31 are respectively fixed on the inner wall of the through hole, and the plurality of first sub-members 31 are connected with each other, so that the acting force of the first sub-members 31 on the filling layer 40 in the through hole can be enhanced, and the first sub-members 31 are not disturbed when the self-compacting concrete is poured; the effect of the first sub-member 31 on the second sub-member 32 can also be enhanced, so that the connection between the filling layer 40 and the lower filling layer 40 in the through hole is more stable, and the filling layer 40 in the through hole is ensured not to be easily leaped out.

Further, the first sub-member 31 is horizontally fixed in the through hole. It will be appreciated that when the first sub-member 31 is horizontally fixed, the force applied between the first sub-member and the inner wall of the through hole is the greatest, which enhances the stability of the first sub-member 31 and the supporting function of the second sub-member 32. Further, the second sub-member 32 is arranged perpendicular to the first sub-member 31. When the second sub-element 32 is arranged perpendicular to the first sub-element 31, the acting force between the two elements can be ensured to be strongest. When the first sub-piece 31 is horizontally fixed in the through hole and the second sub-piece 32 is vertically arranged with the first sub-piece 31, the stability of the filling layer 40 in the through hole can be better ensured, and the driving safety is ensured.

In the embodiment of the present application, the through hole is formed on the track slab 20, and when the filling layer 40 is formed by pouring the self-compacting concrete between the track slab 20 and the base 10, the self-compacting concrete overflows in the through hole, so that the filling layer 40 is also formed in the through hole. The through hole on the track plate 20 can be a pouring hole 21 or an inspection hole. In some embodiments, the through hole is an injection hole 21, and the filling layer 40 is formed by injecting self-compacting concrete from the injection hole 21 to a position between the track slab 20 and the base 10. It will be appreciated that the pouring hole 21 is used to pour self-compacting concrete between the track plate 20 and the base 10. In other embodiments, the via is an inspection hole having a fill layer 40 formed therein.

In some embodiments, the ribs 50 are in the form of a net, which is horizontally embedded in the filling layer 40. On one hand, the net-shaped reinforcing ribs 50 are more beneficial to increasing the strength of the filling layer 40, and on the other hand, the acting force between the net-shaped reinforcing ribs and the connecting piece 30 is stronger, so that the action between the lower filling layer 40 and the filling layer 40 in the through hole can be better enhanced, and the stability is improved.

The construction steps of the CRTS III slab ballastless track of the embodiment of the application are as follows:

1. construction banding template

And a sizing steel template with the same size as the track slab 20 is used as an edge sealing template, the height of the template is 14cm, the overlapping height of the template and the track slab 20 is 5cm, and the processing deviation is not more than 1 mm. And the periphery of the edge sealing template is completely pasted with the permeable template cloth, so that the appearance quality of the concrete is improved. And air outlets are arranged at the arc positions of the four corners of the edge sealing template, and the edge sealing template is plugged by a shaping inserting plate during pouring.

2. Construction pressing device

And installing a pressing device according to the principle of 'straight 4-curved 5' to respectively press the track plate 20 and the edge sealing template. The track plate 20 is compressed by adopting a mode that the turnbuckles at two ends are connected with the embedded anchoring rods of the base 10, the turnbuckles are screwed to achieve the purpose of compressing, and the fastening torque is controlled according to 60 kilograms.

3. Construction sideslip prevention device

At curve section position, because the superelevation influence has the natural altitude difference, receives self-compaction concrete flow to influence during the filling construction, track board 20 takes place easily in the same direction as the removal of the inboard direction of superelevation, need prevent the device that sideslips in the installation of inboard, every track board 20 sets up 2.

4. Mounting attachment 30

The injection holes 21 of the curved track plate 20 and the linear track plate 20 are both disposed at the middle positions thereof. The pouring height of the linear track plate 20 is not smaller than 80cm, and the pouring height of the curved track plate 20 is not smaller than 100 cm. The exhaust holes of the track plate 20 are provided at four corners of the plate for exhausting air and laitance.

The connector 30 in the embodiment of the present application includes a transverse reinforcing bar and a longitudinal reinforcing bar. The connecting piece 30 is put in from the pouring hole 21 and the inspection hole until the transverse steel bar blocks the inner wall of the pouring hole 21 or the inspection hole, and then the transverse steel bar is rotated to enable the hook-shaped structure at the lower end of the longitudinal steel bar to hook the reinforcing rib 50.

5. Installing overflow-proof pipe

The height of the overflow preventing pipe of the linear track plate 20, which needs to be exposed out of the upper surface of the track plate 20, is 35cm, the height of the overflow preventing pipe of the curved track plate 20 needs to be exposed out of 50cm, and the overflow preventing pipe adopts a PVC pipe with the diameter of 160 mm.

6. Pre-wetting track slab 20

The rail plate 20 is pre-wetted by a sprayer connected with a rotary nozzle, and extends into the plate cavity from the pouring hole 21 and the inspection hole respectively for mist spraying 1 hour before pouring. The pre-wetting with or without accumulated water can seriously affect the perfusion quality.

7. Pouring self-compacting concrete

The measuring personnel retest the position of the installed track slab 20 and ensure that the fine tuning deviation is within the allowable range. Before the self-compacting concrete is put into a mold, the performance index of the concrete mixture is detected. During the concrete pouring process, all personnel, machines and equipment must not step on or be placed on the track plate 20. The self-compacting concrete should not be poured too fast, and should be poured in a slow-fast-slow manner, so as to ensure the continuity of the feeding and the continuous flow of the concrete mixture in the space under the track slab 20. When pouring, the funnel is provided with a specially-assigned person to observe the height of the concrete surface, so that concrete overflow or air intake of the slab cavity is avoided.

8. Form removal and maintenance

After the self-compacting concrete is poured, the strength is not less than 10MPa when the mould is removed. When the mold is disassembled, firstly disassembling the fine tuning claw connecting bolt, disassembling the fine tuning claw, then disassembling the jackscrew of the pressing device, and removing the pressing device; and finally, sequentially removing the edge sealing templates. And (3) timely curing (adopting a mode of brushing concrete curing liquid, engineering glue and plastic film), wherein the curing with the mold is not less than 3 days, and the total curing time is not less than 14 days.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and all such changes or substitutions are included in the scope of the present invention. Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.