CN101424061A

CN101424061A - Unballasted track construction

Info

Publication number: CN101424061A
Application number: CNA2008101478123A
Authority: CN
Inventors: 颜华; 潘自立; 李保友; 姚力; 周立新; 刘学毅; 钱振地
Original assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Current assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Priority date: 2008-12-10
Filing date: 2008-12-10
Publication date: 2009-05-06
Anticipated expiration: 2028-12-10
Also published as: CN101424061B

Abstract

The invention discloses a non-ballast track structure, which aims to effectively strengthen the integrity and the anti-vibration performance of a non-ballast track and reduce the maintenance and repair workload of a track structure. The non-ballast track structure comprises a track plate (10) adopting a prestressed reinforced concrete structure, a base (30) adopting a reinforced concrete structure, and a mortar adjustment layer positioned between the track plate (10) and the base (30), wherein the mortar adjustment layer is a resin mortar layer (20), and the resin mortar layer (20) is adhered to the track plate (10) and the base (30) to form an integral structure. The non-ballast track structure has the advantages that the resin mortar layer has good elasticity and adhesive property and can firmly connect the track plate and the base into a whole, thereby improving the integrity and the anti-vibration performance of the non-ballast track structure; and the non-ballast track structure can effectively accelerate the pouring rate of the mortar adjustment layer and ensure the construction quality, so the non-ballast track structure has the characteristic of convenient site construction and can realize rapid maintenance.

Description

Ballastless track structure

Technical field

The present invention relates to railway ballastless track, particularly the structure of non-fragment orbit.

Background technology

China is the country of an earthquake pilosity, and earthquake is huge to the destruction of works, and the rational structure pattern can effectively alleviate earthquake to the structural damage degree, therefore all requires to carry out the earthquake resistant structure design in general works design.China recent years is built high-speed railway and Line for Passenger Transportation just energetically, will lay non-fragment orbit more and more, owing to repair difficulty after the non-fragment orbit structural deterioration, shows important especially in the antidetonation compliance research of earthquake prone areas expansion non-fragment orbit structure.Still have nothing to do in the requirement of non-fragment orbit seismic design aspect in the at present domestic orbit Design standard,, carry out non-fragment orbit shock resistance and compliance research and be in the design of earthquake zone railway ballastless track for guidance and be significant from the track structure security consideration.

Ballastless track structure relates generally to the track plate, adjusts decks such as layer and base, the track plate adopts prestressed reinforced concrete structure, base adopts reinforced concrete structure, wherein adjust layer as the critical structures layer that the ballastless track structural elasticity is adjusted and power transmission is supported, directly influence bullet train and fast and safely move.In existing ballastless track structure, generally adopt cement-asphalt mortar, bituminous mortar (CA mortar) as adjusting layer.But the advantage of CA mortar adjustment layer is a convenient for maintaining to be changed, but because CA mortar adjustment layer can not be connected to integral body with track plate, understructure layer, therefore has the relatively poor deficiency of globality, can't satisfy the requirement that improves the track anti-seismic performance.Simultaneously, for retraining the influence of horizontal train load and vertical equity brake force to track, convex blocking platform need be set on base at interval, vertical two ends at every block of track plate are provided with corresponding breach, therefore also there are the complicated and deficiencies such as passage has some setbacks of constructing of track plated construction, the speed of application that is unfavorable for reducing construction cost and accelerates track.In addition, because the restriction of the performance of its material own and raw material and preparation method's instability, 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, 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, and this structure not only strengthens the globality and the anti-seismic performance of non-fragment orbit effectively, and can reduce track structure maintenance, repair workload.

The technical solution adopted for the present invention to solve the technical problems is: ballastless track structure of the present invention comprises track plate 10 that adopts prestressed reinforced concrete structure and the base 30 that adopts reinforced concrete structure, and the mortar between track plate, base is adjusted layer, it is characterized in that: described mortar is adjusted layer and is the resin mortar layer, and this resin mortar layer and track plate, base bonding form monolithic construction.

As a preferred embodiment of the present invention, described resin mortar layer comprises two banded resin mortar layers along track plate longitudinal extension, and this two ribbons resin mortar layer lays respectively at the horizontal inboard of track plate.

As further optimization, on base, be equipped with cystosepiment between the described two ribbon resin mortar layers to above-mentioned preferred version.

The invention has the beneficial effects as follows that the resin mortar layer has favorable elasticity and caking property, track plate and seat can be connected as one securely, thus the globality and the anti-seismic performance of raising ballastless track structure; Can accelerate mortar effectively and adjust the rate of flooding of layer and guarantee construction quality, therefore have the advantages that to be convenient to site operation, and can realize quick maintenance.

Description of drawings

This manual comprises following six width of cloth accompanying drawings:

Fig. 1 is the schematic cross-sectional view of ballastless track structure of the present invention;

Fig. 2 is the longitudinal section schematic diagram of ballastless track structure of the present invention;

Fig. 3 is the sectional view along B-B line among Fig. 2;

Fig. 4 is the sectional view along A-A line among Fig. 2;

Fig. 5 is the longitudinal section schematic diagram of existing ballastless track structure;

Fig. 6 is the schematic cross-sectional view of existing ballastless track structure.

Expressed parts, toponym and pairing mark among the figure: track plate 10, boss 11, resin mortar layer 20, banded resin mortar layer 21, banded resin mortar layer 22, cystosepiment 23, base 30, pit 31, convex blocking platform 32, CA mortar are adjusted layer 40.

The specific embodiment

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

Existing ballastless track structure shown in Fig. 5 and Fig. 6.With reference to Fig. 5, existing ballastless track structure comprises track plate 10, CA

mortar adjustment layer

40,30 3 the main decks of base that from top to bottom set gradually, and track plate 10 adopts prestressed reinforced concrete structures, and base 30 adopts reinforced concrete structures.But the advantage of CA mortar adjustment layer 40 is convenient for maintaining to be changed, but because CA mortar adjustment layer 40 can not be connected to integral body with track plate 10, understructure layer 30, therefore there is the relatively poor deficiency of globality in ballastless track structure, can't satisfy the requirement that improves the track anti-seismic performance.With reference to Fig. 5 and Fig. 6, for retraining the influence of horizontal train load and vertical equity brake force, need on base 30, at interval convex blocking platform 32 be set to track, cause the construction passage to have some setbacks, influence construction speed.Vertical two ends at every block of track plate 10 are provided with corresponding breach, track plate 10 complex structures, the speed of application that is unfavorable for reducing construction cost and accelerates track.

With reference to Fig. 1, ballastless track structure of the present invention comprise track plate 10 that adopts prestressed reinforced concrete structure and the base 30 that adopts reinforced concrete structure, and the mortar between track plate 10, base 30 is adjusted layer.It is resin mortar layer 20 that described mortar is adjusted layer, and this resin mortar layer 20 forms monolithic construction with track plate 10, base 30 bondings.

Because resin mortar layer 20 has favorable elasticity and caking property, track plate 10 and base 30 can be connected as one more securely, thus the globality and the anti-seismic performance of raising ballastless track structure.The laying construction of resin mortar layer 20 does not need large-scale mortar truck with grout mixer and water tank, its stirring technique and mixing plant are simplified greatly, cure cycle is short, also can be according to the variation of different temperature conditions, but regulate operating period and curing rate, therefore can accelerate the rate of flooding of resin mortar layer 20 effectively, guarantee the construction quality of resin mortar layer 20.Resin mortar layer 20 adopts special equipment that track plate 10, base 30 are separated and clears up, can carry out bed board, tuned plate, positioning operation at once after the based process, through test, after 20 perfusion of resin mortar layer, can recover in 6 hours to be open to traffic, therefore also have and to realize the characteristics of maintenance fast.

The compressive strength of resin mortar layer 20 is far longer than existing CA mortar and adjusts layer 40, so the thickness of resin mortar layer 20 attenuate greatly, thereby reduces construction cost.With reference to Fig. 2 and Fig. 3, for further reducing construction cost, described resin mortar layer 20 comprises two banded resin mortar layers 21,22 along track plate 10 longitudinal extensions, this two ribbons resin mortar layer 21,22 lays respectively at the horizontal inboard of concrete railway board 10, promptly by the consumption that reduces resin mortar construction cost is farthest reduced.For ease of the laying construction of resin mortar,, on base 30, be equipped with cystosepiment 23 between the described two ribbon resin mortar layers 21,22 with reference to Fig. 3.Through a large amount of test and research, the thickness of described banded resin mortar layer 21,22 is 20～30mm, and width is 700～900mm.The described resin mortar layer 20 preferred elastic epoxy resin mortar that adopts.

The tension of resin mortar layer 20, resistance to compression, shear strength are all greater than the intensity of concrete itself, adhesive strength between itself and the concrete is also greater than concrete tensile strength, finish of the transmission of track structure vertical, horizontal power to the basis, bottom, therefore can cancel the convex blocking platform 32 that is arranged at present on the base 30, both simplified the structure of track plate 10, base 30, execution conditions are improved, help improving construction speed.

For further retraining the influence of horizontal train load and vertical equity brake force to track, structure is played the effect of further reinforcement, can take following technical measures, with reference to Fig. 1 and Fig. 4, described track plate 10 has with respect to the boss 11 of its bottom surface to lower convexity, and 30 of bases are provided with suitable with it pit 31 with boss 11 corresponding positions.Potting resin mortar in the gap between boss 11 and the pit 31.The quantity of described boss 11 is generally one, is arranged on the central part place of track plate 10 bottom surfaces.

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 track plate (10) that adopts prestressed reinforced concrete structure and the base (30) that adopts reinforced concrete structure, and the mortar that is positioned between track plate (10), the base (30) is adjusted layer, it is characterized in that: described mortar is adjusted layer and is resin mortar layer (20), and this resin mortar layer (20) forms monolithic construction with track plate (10), base (30) bonding.

2. ballastless track structure as claimed in claim 1, it is characterized in that: described resin mortar layer (20) comprises two banded resin mortar layers (21,22) along track plate (10) longitudinal extension, and this two ribbons resin mortar layer (21,22) lays respectively at the horizontal inboard of track plate (10).

3. ballastless track structure as claimed in claim 2 is characterized in that: be equipped with cystosepiment (23) between the described two ribbon resin mortar layers (21,22) on base (30).

4. ballastless track structure as claimed in claim 3 is characterized in that: the thickness of described banded resin mortar layer (21,22) is 20～30mm, and width is 700～900mm.

5. as any described ballastless track structure in the claim 1～4, it is characterized in that: what described resin mortar layer (20) adopted is the elastic epoxy resin mortar.

6. ballastless track structure as claimed in claim 2, it is characterized in that: described track plate (10) has with respect to the boss (11) of its bottom surface to lower convexity, and base (30) then is provided with suitable with it pit (31) with the corresponding position of boss (11).

7. ballastless track structure as claimed in claim 6 is characterized in that: the quantity of described boss (11) is one, is arranged on the central part place of track plate (10) bottom surface.