CN101798785A

CN101798785A - Ballastless track structure

Info

Publication number: CN101798785A
Application number: CN 201010141939
Authority: CN
Inventors: 朱颖; 颜华; 潘自立; 李保友; 周立新; 钱振地; 刘学毅; 熊维; 傅丽霖; 杨荣山; 张志勤; 陆明; 杨明辉
Original assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Current assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Priority date: 2010-04-08
Filing date: 2010-04-08
Publication date: 2010-08-11

Abstract

The invention relates to a ballastless track structure, which aims at effectively meeting the requirements of a high-speed railway on the smoothness and the comfort of the ballastless track, facilitating the construction of track slabs, reducing the maintenance and repair of the track structure and prolonging the service life of the track structure. The ballastless track structure comprises a bearing layer (10), track slabs (20) lengthwise paved along a line and an adjustment layer positioned between the bearing layer (10) and the track slabs (20), wherein the adjustment layer is a self-compact concrete layer (30), the track slabs (20) and the self-compact concrete layer (30) are connected into a whole by connecting members, and the bearing layer (10) is provided with a spacing structure acting on the self-compact concrete layer (30).

Description

A kind of ballastless track structure

Technical field

The present invention relates to railway ballastless track, particularly a kind of ballastless track structure that is used for high-speed railway.

Background technology

Ballastless track structure mainly is made of decks such as track plate, adjustment layer and bearing beds, and the track plate adopts prestressed reinforced concrete structure, and bearing bed is laid on the online basis down.Wherein adjust layer as the critical structures layer that the non-fragment orbit structural elasticity is adjusted and power transmission is supported, directly influence bullet train and fast and safely move.In existing ballastless track structure, the track plate adopts prestressed reinforced concrete structure usually, for avoiding the plate body cracking, laterally is laid with many group prestressed steel bars in the plate body.Track plate road along the line vertically is laid on to be adjusted on the floor, during laying adjacent two blocks of track plates vertically between adopt circular convex retaining platform, after the adjustment of track plate is in place, the filling asphalt mortar, bituminous mortar is adjusted layer between track plate and carrying laminate, potting resin mortar in the gap between plate and circular convex retaining platform.In existing unit plate-type ballastless track structure, the track plate has just applied prestressing force by its prestressed steel bar to plate body when plant produced, and laying between every block of track plate after installing is independently.Its weak point is, after circuit moves a period of time, track plate and asphalt mortar, bituminous mortar adjustment layer can be peeled off, and the longitudinal end of track plate easily produces warpage, and this causes adverse influence can for the life-span of stationarity, comfortableness and the track structure of train operation undoubtedly.The plate-type ballastless track structure that longitudinal-connecting type is also arranged, but it connects the mode that pattern is equal to the longitudinal prestressing reinforcing bar substantially, the joint construction complexity, it is comparatively loaded down with trivial details to construct.In addition, adjust layer and generally adopt cement-asphalt mortar, bituminous mortar (CA mortar), but the advantage of CA mortar adjustment layer is a convenient for maintaining to be changed, but because CA mortar material intensity is on the low side, be difficult to bear chronic fatigue load, CA mortar construction technology is loaded down with trivial details, must be equipped with special-purpose the stirring and perfusion equipment, and the hardening of cement time is long, and intensity rises slow, and is bigger to the construction speed influence.

Summary of the invention

Technical problem to be solved by this invention provides a kind of ballastless track structure, can not only satisfy the requirement of non-fragment orbit effectively to stationarity, comfortableness, and track slab construction is convenient, and can reduce the track structure maintenance, repair, increases the application life of track structure.

The technical solution adopted for the present invention to solve the technical problems is: a kind of ballastless track structure of the present invention, comprise the track plate that vertically lay on bearing bed and road along the line, and the adjustment layer between bearing bed, track plate, it is characterized in that: described adjustment layer is the self-compacting concrete layer, connect as one by connecting elements between track plate and the self-compacting concrete layer, described bearing bed has the position limiting structure that acts on the self-compacting concrete layer.

The door shaped steel muscle that described connecting elements is buried underground for be partitioned into row along rail plate long degree direction, fixedly connected with arrangement of reinforcement in the track plate in the top of each shaped steel muscle, and the bottom then protrudes in the self-compacting concrete layer.

Positive stop lug boss or the limited impression of described position limiting structure for laying at interval along the bearing bed center line, each positive stop lug boss is upwards protruded in the self-compacting concrete layer by the bearing bed surface.

The invention has the beneficial effects as follows, slab track plate and self-compacting concrete layer connect as one, form overall structure, improved the globality of track, can satisfy the requirement of non-fragment orbit, and solve the track plate effectively and asphalt mortar, bituminous mortar adjustment layer is easily peeled off, track plate longitudinal end easily produces problems such as warpage stationarity, comfortableness; Adopt the self-compacting concrete layer as adjusting layer, can simplify construction technology, be convenient to the Control Engineering quality, reduce pollution environment; The circular convex retaining of cancellation platform structure on the bearing bed, the boss resin need not poured in track plate end, the track structure easy construction, and can reduce the track structure maintenance, repair, increase the application life of track structure.

Description of drawings

This manual comprises following four width of cloth accompanying drawings:

Fig. 1 is the longitudinal section schematic diagram of ballastless track structure of the present invention;

Fig. 2 is the schematic cross-sectional view of ballastless track structure of the present invention;

Fig. 3 is the enlarged diagram of A part among Fig. 2;

Fig. 4 is the schematic cross-sectional view of ballastless track structure of the present invention.

Component shown in the figure, toponym and pairing mark: bearing bed 10, positive stop lug boss 11, limited impression 12, track plate 20, door shaped steel muscle 21, shoulder block 22, self-compacting concrete layer 30, separation layer 40.

The specific embodiment

The present invention is further described below in conjunction with drawings and Examples.

See figures.1.and.2, a kind of ballastless track structure of the present invention comprises the track plate 20 that vertically lay on bearing bed 10 and road along the line, and the adjustment layer between bearing bed 10, track plate 20.Described adjustment layer is a self-compacting concrete layer 30, connect as one by connecting elements between track plate 20 and the self-compacting concrete layer 30, form overall structure, can improve the globality of track, satisfy the requirement of non-fragment orbit, and can solve the track plate effectively and asphalt mortar, bituminous mortar adjustment layer is easily peeled off, track plate longitudinal end easily produces problems such as warpage stationarity, comfortableness.The circular convex retaining of cancellation platform structure on the bearing bed, the boss resin need not poured in track plate end, the track structure easy construction, and can reduce the track structure maintenance, repair, increase the application life of track structure.Adopt the self-compacting concrete layer as adjusting layer, can simplify construction technology, be convenient to the Control Engineering quality, reduce pollution environment.Described bearing bed 10 has the position limiting structure that acts on self-compacting concrete layer 30, to retrain the influence to track structure of horizontal train load and vertical equity brake force, structure is played the effect of further reinforcement.

Described connecting elements can adopt multiple structure, as the pre-buried WELDING STUDS in the track plate 20, the reinforcement component of different shape etc. of being fixed on, shown in Fig. 1 is wherein a kind of preferred structure, it is the door shaped steel muscle 21 that described connecting elements is buried underground for be partitioned into row along track plate 20 length directions, fixedly connected with arrangement of reinforcement in the track plate 20 in the top of each shaped steel muscle 21, the bottom then protrudes in the self-compacting concrete layer 30.With reference to Fig. 2, described door shaped steel muscle 21 can be laid two row usually, is laid in the below of location of rail at interval along track plate 20 widths.

With reference to Fig. 2, described position limiting structure can adopt the positive stop lug boss of laying at interval along bearing bed 10 center lines 11, and each positive stop lug boss 11 is upwards protruded in the self-compacting concrete layer 30 by bearing bed 10 surfaces.With reference to Fig. 3, for making things convenient for the maintenance, repair of track structure, be provided with separation layer 40 between the surface of described bearing bed 10 and self-compacting concrete layer 30 bottom surface, separation layer 40 adopts geotextiles usually.With reference to Fig. 4, described position limiting structure also can adopt the limited impression of laying at interval along bearing bed 10 center lines 12, and self-compacting concrete layer 30 perfusion back form recessed boss in limited impression 12.

With reference to Fig. 2, describedly be used to retrain the traversing shoulder block of rail fastening 22 along being laid with two row on the surface of track plate 20.The curve location adapts to the rail of superelevation variation and sharp radius curve to the adjustment problem by elevation and the plan-position of adjusting rail support groove, therefore it is linear to be fit to little curve, can further reduce fastener rigidity, and possess application property and gauge hold facility preferably

Some principles of the above ballastless track structure of the present invention that just explains through diagrams, be not be the present invention to be confined to shown in and in described concrete structure and the scope of application, so every the corresponding modify and equivalent that might be utilized, the claim that all belongs to the present invention and applied for.

Claims

1. ballastless track structure, comprise the track plate (20) that vertically lay on bearing bed (10) and road along the line, and be positioned at adjustment layer between bearing bed (10), the track plate (20), it is characterized in that: described adjustment layer is self-compacting concrete layer (30), connect as one by connecting elements between track plate (20) and the self-compacting concrete layer (30), described bearing bed (10) has the position limiting structure that acts on self-compacting concrete layer (30).

2. a kind of ballastless track structure as claimed in claim 1, it is characterized in that: the door shaped steel muscle (21) that described connecting elements is buried underground for be partitioned into row along track plate (20) length direction, fixedly connected with the interior arrangement of reinforcement of track plate (20) in the top of each shaped steel muscle (21), the bottom then protrudes in the self-compacting concrete layer (30).

3. a kind of ballastless track structure as claimed in claim 2 is characterized in that: described door shaped steel muscle (21) is two row, lays at interval along track plate (20) width.

4. a kind of ballastless track structure as claimed in claim 1, it is characterized in that: the positive stop lug boss (11) of described position limiting structure for laying at interval along bearing bed (10) center line, each positive stop lug boss (11) is upwards protruded in the self-compacting concrete layer (30) by bearing bed (10) surface.

5. a kind of ballastless track structure as claimed in claim 1 is characterized in that: the limited impression (12) of described position limiting structure for laying at interval along bearing bed (10) center line, self-compacting concrete layer (30) perfusion back forms recessed boss in limited impression (12).

6. a kind of ballastless track structure as claimed in claim 1 is characterized in that: be provided with separation layer (40) between the surface of described bearing bed (10) and self-compacting concrete layer (30) bottom surface.

7. a kind of ballastless track structure as claimed in claim 1 is characterized in that: describedly be used to retrain the traversing shoulder block of rail fastening (22) along being laid with two row on the surface of track plate (20).