Fabricated ballastless track with under-slab strip-shaped limiting function

Abstract

The assembly type ballastless track is arranged on a track foundation and comprises a plurality of prefabricated track boards laid above the track foundation, strip-shaped bosses are arranged on the two sides of the bottom of each track board, a through hole is formed in the center of each track board, a middle layer is poured in a gap between each track board and the track foundation, and the middle layer is provided with a through hole. The two sides of the top of the middle layer are provided with inserting grooves allowing the strip-shaped bosses to be inserted therein, and the center of the top of the middle layer is provided with a cylindrical boss capable of being inserted into the through hole. By the adoption of the assembly type ballastless track, the cast-in-place concrete amount can be reduced so as to improve the construction efficiency, and the overall structure of the track adopts the design that a base is omitted, so that the construction cost can be effectively saved; in addition, the middle concrete layer achieves the effects of supporting, leveling, rail structure linetype adjustment and longitudinal and transverse limiting, particularly, the through strip-shaped boss structure below the plate can effectively improve the transverse resistance resisting capacity of the rail plate, and the overall stability of the rail structure is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to urban rail transit technical field, concretely relates to a strip-shaped limit assembly type ballastless track under the slab. BACKGROUND

[0002] At present, urban rail transit mainly adopts cast-in-place track structure, which has many disadvantages such as slow construction progress, large amount of on-site concrete pouring, many cracks in cast-in-place bed and difficult control, difficult maintenance and difficult guarantee of damping effect. At present, the application of assembly slab track has been proposed and promoted in many places. With the improvement of green environmental protection and energy saving, construction quality and quality of rail transit, the assembly slab track is the main development direction of urban rail transit in the future. From the existing assembly track structure, it can be seen that the assembly track structure has the following technical defects: 1. The overall stability of the assembly track structure is poor, especially the transverse resistance of the track slab needs to be improved; 2. The construction efficiency of the cast-in-place section of the assembly track is low, and the quality control of the cast-in-place concrete is difficult; 3. The assembly track is difficult to replace in the subsequent operation and maintenance stage. Therefore, the utility model aims to provide a strip-shaped limit assembly type ballastless track under the slab to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0003] In order to overcome the technical problems of the prior art, the utility model aims to provide a strip-shaped limit assembly type ballastless track under the slab.

[0004] The utility model relates to a strip-shaped limit assembly type ballastless track under the slab, which is arranged on a track foundation and comprises a plurality of prefabricated track slabs arranged above the track foundation. Both sides of the bottom of the track slab are provided with strip-shaped bosses, and the center of the track slab is provided with a through hole. The gap between the track slab and the track foundation is filled with an intermediate layer. Both sides of the top of the intermediate layer are provided with insertion grooves for the strip-shaped bosses, and the center of the top of the intermediate layer is provided with a cylindrical boss which can be inserted into the through hole.

[0005] As a preferred technical scheme, the track slab is symmetrically provided with two groups of exhaust holes with the through hole as the center, which can be used for exhaust and observation when pouring the intermediate layer.

[0006] As a preferred technical scheme, the strip-shaped boss penetrates the track slab, and the distance between the strip-shaped boss and the edge of the track slab is 200-250mm.

[0007] As a preferred technical scheme, an elastic buffer pad layer is bonded between the through hole and the cylindrical boss.

[0008] As a preferred technical scheme, the elastic buffer pad layer is sealed with sealant between the through hole and the cylindrical boss.

[0009] As a preferred technical scheme, the track slab and the intermediate layer are provided with an isolation cushion layer.

[0010] As a preferred technical scheme, the main thickness of the intermediate layer is 100-150 mm, and the thickness of the isolation cushion layer is 5-10 mm.

[0011] As a preferred technical scheme, eight pairs of rail supporting platforms are uniformly distributed on the top of any track slab.

[0012] As a preferred technical scheme, steel bars are embedded on the top of the track foundation, so that the intermediate layer is integrally formed with the track foundation when the intermediate layer is poured.

[0013] As a preferred technical scheme, a slab joint is left between two adjacent groups of track slabs, so as to provide installation space for setting ground terminals, over-rail pipelines and other components.

[0014] In summary, the utility model has the following technical effects:

[0015] The utility model discloses a kind of slab under strip shape limit's assembly type ballastless track, be equipped in track foundation, including several prefabricated track slab being laid on the top of track foundation, track slab bottom two sides are equipped with strip boss, track slab center is equipped with through hole, wherein, intermediate layer is cast in the gap of track slab and track foundation two, intermediate layer top two sides are equipped with the insertion slot that can be inserted into strip boss, intermediate layer top center is equipped with the cylindrical boss that can be inserted into the through hole. The utility model discloses a kind of slab under strip shape limit's assembly type ballastless track, with following technical effects: 1, the overall structure of track of the utility model is composed of track slab and intermediate concrete layer etc., main components of track can be by using standardization design, factory prefabrication, using the design construction method of "dividing into parts first, then "collecting parts into whole", it can be obtained in construction site or factory full assembly, reduce the pouring amount of concrete in site, improve construction quality and construction efficiency, and the overall structure of track adopts cancel pedestal design to effectively save construction cost;2, the intermediate concrete layer of the utility model realizes the function of supporting, leveling, adjusting track structure linear and longitudinal and transverse limit, especially the strip boss structure under through slab can effectively improve the transverse resistance capacity of track slab, improve the overall stability of track structure;3, the through hole of the utility model's track slab can be used as perfusion hole, and two rows of air holes are also provided as air hole and observation hole, which optimizes the pouring construction technology of intermediate layer, at the same time, the intermediate layer realizes the integrated construction of adjusting layer and limit structure, simplifies construction process, and improves construction efficiency;4, the elastic buffer pad layer of the utility model can buffer isolation and protect cylindrical boss that does limit action, and the adhesive isolation pad layer between track slab and intermediate layer can realize the separation of intermediate layer and track slab, further effectively improve the efficiency of later maintenance and repair replacement plate, and provide convenience for later vibration reduction and noise reduction upgrade. Therefore, compared with the existing assembly type ballastless track technology, the utility model provides a kind of slab under strip shape limit's assembly type ballastless track, which has obvious technical advantages. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0017] Figure 1 It is the three-dimensional structure schematic diagram of the assembly type ballastless track of the utility model embodiment;

[0018] Figure 2 It is the explosion structure schematic diagram of the assembly type ballastless track of the utility model embodiment;

[0019] Figure 3is a three-dimensional schematic view of the track plate of the embodiment of the utility model;

[0020] Figure 4 is a three-dimensional schematic view of the intermediate layer of the embodiment of the utility model;

[0021] In which, the meaning of the reference sign is as follows:

[0022] 1-track foundation, 2-track plate, 21-strip boss, 22-penetration hole, 23-exhaust hole, 3-riding platform, 4-intermediate layer, 41-insertion slot, 42-cylindrical boss, 43-assistant boss, 5-isolation pad layer, 6-elastic buffer pad layer, 7-steel bar. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments will be described clearly and completely in the description of the embodiments in combination with the drawings in the embodiments. The embodiments described in the description are only for the purpose of illustration, and are not used to limit the protection scope of the utility model, so it should be understood that various modifications and changes can be made to the embodiments without departing from the protection scope of the utility model.

[0024] In the description of the present application, unless otherwise explicitly specified and limited, the term "and / or" includes any combination and all combinations of one or more associated listed items. Unless otherwise specified or explained, the terms "connection", "fixation" and the like should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; "connection" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Further, in the description of the utility model, it should be understood that the orientation words described in the embodiments are described at the angle shown in the drawings, and should not be understood as limiting the embodiments. It should also be understood that in the context, when referring to one element or feature connected with another element (one or more), it can not only be directly connected with another (one or more) element, but also indirectly connected with another (one or more) element through an intermediate element.

[0026] Before introducing the technical scheme of the utility model, it is necessary to expound the creation background of the invention and creation of the utility model. At present, urban rail transit mainly adopts cast-in-place track structure, which has many disadvantages such as slow construction progress, large amount of on-site concrete pouring, many cracks in cast-in-place bed and difficult control, difficult maintenance and difficult guarantee of vibration reduction effect. At present, the application of assembled slab track has been proposed and promoted in many places. With the improvement of green environmental protection and energy saving, construction quality and quality of rail transit, the assembled slab track is the main development direction of urban rail transit in the future. From the existing assembled track structure, it can be seen that the assembled track structure generally has the following technical defects: 1. The overall stability of the assembled track structure is poor, especially the transverse resistance of the track slab needs to be improved; 2. The construction efficiency of the cast-in-place section of the assembled track is low, and the quality control of the cast-in-place concrete is difficult; 3. The track slab is difficult to replace in the subsequent operation and maintenance stage. In order to overcome the technical problems of the prior art, the utility model aims to provide a strip-shaped limiting assembled ballastless track under the slab.

[0027] Please refer to Figures 1 to 4 The utility model exemplary embodiment provides a kind of strip-shaped limiting assembled ballastless track under slab. It is located on track foundation 1, including several precast track slab 2 being laid on the top of the track foundation 1, this track slab 2 can be by using standardization design, factory prefabrication, reduce the pouring amount of on-site concrete, improve construction quality and construction efficiency, track slab 2 bottom two sides are equipped with strip boss 21, track slab 2 center is equipped with through hole 22, wherein, the gap between track slab 2 and track foundation 1 is poured with intermediate layer 4, the top of intermediate layer 4 two sides is equipped with the insertion slot 41 that can be inserted strip boss 21, the top center of intermediate layer 4 is equipped with the cylindrical boss 42 that can be inserted the through hole 22. It needs to be explained that the limiting structure of the assembled ballastless track of the utility model is formed by the mutual coupling of track slab 2 and intermediate layer 4, specifically, the strip boss 21 on the bottom two sides of track slab 2 cooperates with the insertion slot 41 on the top of intermediate layer 4 to realize longitudinal and transverse limiting function, i.e. limit track slab 2 rotation and longitudinal and transverse movement, in combination with the through hole 22 on the center of track slab 2 cooperates with the cylindrical boss 42 on the top of intermediate layer 4 to jointly guarantee the overall stability of structure, limiting boss is reinforced concrete structure, concrete grade C40, is continuously poured with intermediate layer 4 to form whole, and is connected with lower track foundation 1 by reinforcing bar 7 to form whole, further guarantee the overall stability of structure. It can be understood that the overall structure of the assembled ballastless track of the utility model is composed of track slab 2 and intermediate concrete layer, and the main components of the track can be designed by standardization and prefabricated in factory. The design and construction method of "dividing the whole into parts and then integrating the parts" is adopted, which improves the construction quality and efficiency. Moreover, the overall structure of the track adopts the design of canceling the base, which greatly reduces the overall weight of the track structure and effectively saves the construction cost.

[0028] In some embodiments, referring to Figure 1 , the track plate 2 is symmetrically provided with two groups of exhaust holes 23 centered on the through hole 22. The purpose of such design is that when the intermediate layer 4 is poured, the through hole 22 at the center of the track plate 2 can be used as a pouring channel, and the two groups of exhaust holes 23 can be used for exhaust and observation, realizing the integrated construction of the intermediate layer 4, simplifying the construction process and improving the construction efficiency. It should be noted that the cylindrical boss 42 is formed by pouring the intermediate layer 4, and the cylindrical boss 42 is the same height as the track plate 2. Preferably, the cylindrical boss 42 is preferably a cylindrical boss 42 structure to reduce stress concentration. It should be noted that after the intermediate layer 4 is poured, the auxiliary boss 43 is formed in the exhaust hole 23 for auxiliary limiting.

[0029] As a preferred technical solution, referring to Figure 1 and Figure 3 , the strip-shaped boss 21 penetrates the track plate 2, and the strip-shaped boss 21 is 200-250 mm away from the edge of the track plate 2, so as to maximize the longitudinal and lateral limiting function of the strip-shaped boss 21 to the track plate 2. Preferably, in the present embodiment, the strip-shaped boss 21 is located directly below the rail supporting platform 3, further enhancing the load-bearing capacity of the track plate 2.

[0030] Further, as a preferred technical solution, referring to Figure 2 , an elastic buffer pad layer 6 is bonded between the through hole 22 and the cylindrical boss 42. The purpose of such design is that by providing the elastic buffer pad layer 6, the first boss and the second boss can be buffered, isolated and protected. Further, the elastic buffer pad layer 6 is sealed with sealant between the through hole 22 and the cylindrical boss 42 to prevent rainwater from entering the interior of the track structure.

[0031] In some embodiments, referring to Figure 2 , an isolation pad layer 5 is provided between the track plate 2 and the intermediate layer 4. It should be understood that the isolation pad layer 5 is provided with a plurality of notches to adapt to the bosses between the track plate 2 and the intermediate layer 4. This isolation pad layer 5 can separate the intermediate layer 4 from the track plate 2 during later maintenance and repair and replacement of the plate, further effectively improving the efficiency of later maintenance and repair and replacement of the plate, and providing convenience for later vibration and noise reduction upgrades. As a preferred technical solution, the main thickness of the intermediate layer 4 is 100-150 mm, and the thickness of the isolation pad layer 5 is 5-10 mm.

[0032] In some embodiments, since the track in urban rail transit often uses direct current, it is easy to cause direct current leakage and electrochemical corrosion. In order to meet the insulation performance requirements of urban rail transit, a track plate 2 structure with a rail supporting platform 3 type is preferably used. Preferably, as Figure 1As shown, eight pairs of rail supporting tables 3 are evenly arranged on the top of the track plate 2.

[0033] As a preferred technical scheme, please refer to Figure 2 The track foundation 1 is embedded with steel bars 7 on the top, so that the intermediate layer 4 is integrated with the track foundation 1 when pouring. The purpose of such design is to integrate the intermediate layer 4 with the track foundation 1 when pouring, effectively enhance the connection between the track foundation 1 and the track structure, form a stable force transmission system of the track structure from the track surface to the lower foundation, further guarantee the overall stability of the track structure, and preferably, the embedded steel bars 7 are door-shaped steel bars.

[0034] As a preferred technical scheme, a plate gap is left between the two adjacent groups of track plates, so as to provide installation space for the setting of grounding terminals, track crossing pipelines and other components. Specifically, the track overall structure is connected by a plurality of track plates, a plate gap is left between the adjacent track plates, the grounding terminals are arranged at the plate gap positions of the adjacent track plates, and one grounding terminal is arranged on the left and right sides of each plate gap; at the same time, the track crossing pipelines of urban rail transit can pass through the plate gap positions; in addition, the track system drainage can be longitudinally drained through the plate gaps on both sides of the track plate 2.

[0035] To sum up, the assembled track with strip-shaped limiting under the plate has the following technical advantages:

[0036] 1. The track overall structure of the utility model is composed of track plates and intermediate concrete layers, and the main components of the track can be designed and prefabricated in a standardized manner. The design and construction method of "dividing the whole into parts and then integrating the parts" can be used to obtain a full assembly at the construction site or in the factory, thereby reducing the amount of concrete pouring on site, improving construction quality and efficiency, and effectively saving construction costs by canceling the design of the base.

[0037] 2. The intermediate concrete layer realizes the functions of supporting, leveling, adjusting the linear type of the track structure, and longitudinal and horizontal limiting, and the through strip-shaped boss structure under the plate can effectively improve the transverse resistance of the track plate and the overall stability of the track structure.

[0038] 3. The through hole of the track plate can be used as a pouring hole, and two rows of air holes are also provided as air outlets and observation holes, which optimizes the pouring construction process of the intermediate layer. At the same time, the intermediate layer realizes the integrated construction of the adjusting layer and the limiting structure, simplifies the construction process, and improves the construction efficiency.

[0039] 4、The elastic buffer cushion layer can buffer and isolate and protect the cylindrical boss with limiting function, meanwhile, the isolation cushion layer is bonded between the track plate and the intermediate layer, the intermediate layer and the track plate can be separated, the efficiency of post maintenance and maintenance plate replacement is further improved, and convenience is provided for post vibration and noise reduction upgrading

[0040] Therefore, compared with the existing assembled ballastless track technology, the assembled ballastless track with strip-shaped limiting under the plate has obvious technical advantages.

[0041] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An assembled ballastless track with strip-shaped limit under the slab, which is arranged on a track foundation, characterized in that, The utility model relates to a track foundation and track plate, which comprises a track foundation and several prefabricated track plates laid above the track foundation, the bottom of the track plate is provided with strip-shaped bosses on both sides, and the center of the track plate is provided with a through hole, wherein a middle layer is cast in the gap between the track plate and the track foundation, the top of the middle layer is provided with insertion slots on both sides for the strip-shaped bosses to be inserted, and the top center of the middle layer is provided with a cylindrical boss for the through hole to be inserted.

2. The assembled ballastless track according to claim 1, characterized in that, The track plate is symmetrically provided with two groups of exhaust holes with the through hole as the center, which are used for exhaust and observation when the middle layer is cast.

3. The assembled ballastless track according to claim 1, characterized in that, The strip-shaped bosses penetrate the track plate, and the distance between the strip-shaped bosses and the edge of the track plate is 200-250mm.

4. The assembled ballastless track according to claim 1, characterized in that, An elastic buffer pad layer is bonded between the through hole and the cylindrical boss.

5. The assembled ballastless track according to claim 4, characterized in that, The elastic buffer pad layer is sealed with sealant between the through hole and the cylindrical boss.

6. The assembled ballastless track according to claim 1, characterized in that, An isolation pad layer is arranged between the track plate and the middle layer.

7. The assembled ballastless track according to claim 6, characterized in that, The main thickness of the middle layer is 100-150mm, and the thickness of the isolation pad layer is 5-10mm.

8. The assembled ballastless track according to claim 1, characterized in that, Eight pairs of rail supporting platforms are uniformly distributed on the top of any track plate.

9. The assembled ballastless track according to claim 1, characterized in that, Steel bars are embedded in the top of the track foundation to form an integral body with the middle layer when the middle layer is cast.

10. The assembled ballastless track according to claim 1, characterized in that, Plate joints are left between two adjacent groups of track plates to provide installation space for the setting of grounding terminals and over-track pipelines.

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