Fabricated ballastless track with four corners limited below plate

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, each track board is a rectangular board, a through hole is formed in the center of each track board, and rectangular notches are formed in the four corners of each track board. A middle layer is poured in a gap between the track plate and the track foundation, and a first boss capable of being inserted into the through hole and a second boss capable of being inserted into the rectangular notch are arranged in the center of the top of the middle layer. According to the assembly type ballastless track, the cast-in-place concrete amount can be reduced, and the overall structure of the track adopts the design that a base is omitted, so that the construction cost is saved; the track plate is a regular rectangular plate and is convenient to produce, manufacture, stack, transport and assemble on site; the middle concrete layer achieves the effects of supporting, leveling and adjusting the line type of the track structure, the first bosses arranged in the track plate and the second bosses arranged at the four corners of the plate enhance the longitudinal and transverse limiting effect on the track plate, and the overall stability of the track structure is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to urban rail transit technical field, concretely relates to a four corner limit assembly type ballastless track under the board. 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 to control, difficult maintenance, and difficult to guarantee the vibration reduction effect. At present, the application of assembly track slab 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 track slab is the main development direction of urban rail transit in the future. From the existing assembly track structure, it can be known that the assembly track structure includes a limiting structure. However, the overall stability of the existing assembly track structure is poor, especially the longitudinal and transverse limiting effect of the track slab needs to be improved. In addition, the existence of the limiting structure makes the single track slab usually an irregular shaped plate, which is not convenient for production, storage, transportation and on-site assembly. Moreover, there is a technical problem of difficult track slab replacement in the subsequent operation and maintenance stage of the existing assembly track. Therefore, the utility model aims to provide a four corner limit assembly type ballastless track under the board to solve the above technical problems. SUMMARY

[0003] In order to overcome the technical problems of the prior art, the utility model aims to provide a four corner limit assembly type ballastless track under the board.

[0004] The utility model relates to a four corner limit assembly type ballastless track under the board, which is arranged on a track foundation and comprises a plurality of prefabricated track slabs arranged above the track foundation. The track slab is a rectangular plate with a through hole in the center. The four corners of the track slab are provided with rectangular notches. An intermediate layer is poured in the gap between the track slab and the track foundation. The top center of the intermediate layer is provided with a first boss which can be inserted into the through hole and a second boss which can be inserted into the rectangular notch.

[0005] As a preferred technical solution, the bottom of the track slab is a flat surface, which is convenient for on-site storage and transportation.

[0006] As a preferred technical solution, the length direction of the rectangular notch is consistent with the length direction of the track slab.

[0007] As a preferred technical solution, the through hole is a cylindrical through hole. When pouring the intermediate layer, the through hole is used as a pouring channel, and the rectangular notch is used for exhaust and observation.

[0008] Preferably, elastic buffer pads are arranged between the through holes and the first protrusions, and between the rectangular notches and the second protrusions.

[0009] Preferably, the elastic buffer pads are sealed by sealant on both sides.

[0010] Preferably, an isolation pad is arranged between the track plates and the intermediate layer.

[0011] Preferably, eight pairs of rail supporting platforms are evenly distributed on the top of each track plate.

[0012] Preferably, 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] Preferably, a plate joint is left between two adjacent groups of track plates, 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 four corners limit's assembled ballastless track of board under, be located on the track foundation, including a plurality of prefabricated track slab that is laid on the upside of track foundation, and the track slab is rectangular board and is equipped with the through hole in the center, and the four corners of track slab all are equipped with rectangular gap, wherein, the intermediate layer is poured in the clearance of track slab and track foundation two, and the first boss that can insert the through hole and the second boss that can insert the rectangular gap are equipped with in the top center of intermediate layer. The four corners limit's assembled ballastless track of board under adopting the utility model has the following technical effects: 1, the track overall structure of the utility model is composed of track slab and intermediate concrete layer etc., and the main components of track can be designed by standardization, prefabricated in factory, adopts the design construction method of " dividing into parts first, then integrating into a whole", reduces the pouring amount of concrete on site, improves construction quality and construction efficiency, and the track overall structure adopts the design of canceling the base, which can effectively save the 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 first boss and each second boss of the second boss of board four corners that are arranged in the track slab board at the same time, which enhances the longitudinal and transverse limit function of track slab, effectively improves the overall stability of track structure, 3, the track slab of the utility model is not interfered by the limit structure, and the bottom of track slab is flat, and the single track slab is regular rectangular board, which is convenient for production, stacking, transportation and on-site assembly, 4, the elastic buffer pad layer of the utility model can buffer and isolate the first boss and the second boss that play the limiting role, and simultaneously bond and isolate the pad layer between the track slab and the intermediate layer, which can realize the separation of the intermediate layer and the track slab, further effectively improve the efficiency of later maintenance and repair replacement, and provide convenience for later vibration reduction and noise reduction upgrade. Compared with the existing assembled ballastless track technology, the four corners limit's assembled ballastless track of board under provided by the utility model has obvious technical advantages. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in 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, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

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

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

[0019] Figure 3 It is the three-dimensional schematic diagram of the track slab of the utility model embodiment;

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

[0021] In the drawings, the reference signs have the following meanings:

[0022] 1 - track base, 2 - track plate, 21 - through hole, 22 - rectangular notch, 3 - intermediate layer, 31 - first boss, 32 - second boss, 4 - rail bearing platform, 5 - isolation pad, 6 - elastic buffer pad. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments will be described clearly and completely in the embodiments of the present application with reference to the drawings. The embodiments described in the description are only for illustrative purposes, and are not intended to limit the protection scope of the present application. Therefore, it should be understood that various modifications and changes can be made to the embodiments without departing from the protection scope of the present application.

[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 present application, 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 to another element (one or more), it can not only be directly connected to the other element (one or more), but also indirectly connected to the other element (one or more) 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: the current 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 to control, difficult maintenance, difficult to guarantee the vibration reduction effect and the like. At present, the application of assembly plate type 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 plate type track is the main development direction of future urban rail transit. From the existing assembly type track structure, it can be known that the assembly type track structure includes a limiting structure, however, the overall stability of the existing assembly type track structure is poor, especially the longitudinal and transverse limiting effect of the track plate needs to be improved. In addition, the existence of the limiting structure makes a single track plate usually be an irregular shaped plate, which is not convenient for production, manufacturing, stacking, transportation and on-site assembly. Moreover, the existing assembly type track generally has the technical problem of difficult plate replacement in the subsequent operation and maintenance stage.

[0027] Please refer to Figures 1 to 4 The utility model exemplary embodiment provides a kind of assembly type ballastless track of four corners limiting under plate, be located on track foundation 1, including several precast track plates 2 being laid above track foundation 1, this track plate 2 can be by using standardization design, factory prefabrication, reduce the pouring amount of on-site concrete, improve construction quality and construction efficiency, track plate 2 is rectangular plate and is equipped with through hole 21 in center, four corners of track plate 2 are equipped with rectangular notch 22, wherein, intermediate layer 3 is poured in the gap of track plate 2 and track foundation 1 two, intermediate layer 3 top center is equipped with the first boss 31 that can be inserted into through hole 21, and the second boss 32 that can be inserted into rectangular notch 22.

[0028] Specifically, please refer to Figure 1 And Figure 2The limiting relationship between the track plate 2 and the intermediate layer 3 includes the coupling effect of the rectangular notch 22 at the four corners of the track plate 2 and the second boss 32 of the intermediate layer 3, and the coupling effect of the through hole 21 at the center of the track plate 2 and the first boss 31 of the intermediate layer 3, so as to realize the longitudinal and lateral limiting functions of the track plate 2 together, and guarantee the overall stability of the track structure, and especially the four-corner limiting mode can effectively prevent the track plate 2 from rotating and moving longitudinally and laterally, so that the construction and installation are more convenient and fast. The first boss 31 and the second boss 32 are integrally formed when the intermediate layer 3 is poured, and are a reinforced concrete structure, and the concrete grade is C40. The intermediate layer 3 is continuously poured to form an integral whole with the intermediate layer 3, and is connected with the track foundation 1 at the lower part to form an integral whole through the door-shaped reinforcing steel bars, so as to further guarantee the overall stability of the structure. As an optimal technical solution, the reinforcing steel bars are embedded in the top of the track foundation 1, so that the intermediate layer 3 is integrally formed with the track foundation 1 when poured, effectively enhances the connection between the track foundation 1 and the track structure, forms a stable force transmission system of the track structure from the track surface to the lower foundation, and further guarantees the overall stability of the track structure. Preferably, the embedded reinforcing steel bars are door-shaped reinforcing steel bars.

[0029] As an optimal technical solution, the bottom of the track plate 2 is a flat surface, which is convenient for on-site stacking and transportation. As known from the above, the first boss 31 and the second boss 32 are integrally formed when the intermediate layer 3 is poured, and the track plate 2 only needs to be provided with corresponding through holes 21 and rectangular notches 22, which not only reduces the weight of the track plate 2, but also ensures that the bottom of the track plate 2 is a flat surface, which is more convenient for production and manufacturing, and is conducive to the stacking and transportation of the track plate 2.

[0030] 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, the track plate 2 structure with the bearing rail table 4 type is preferably adopted. Preferably, as shown in Figure 2 , eight pairs of bearing rail tables 4 are uniformly arranged on the top of the track plate 2.

[0031] Further, in some embodiments, please refer to Figure 3 , the length direction of the rectangular notch 22 is consistent with the length direction of the track plate 2. The purpose of such design is that eight pairs of bearing rail tables 4 are uniformly arranged on the top of the track plate 2, and the bearing rail table 4 is relatively narrow from the side edge of the track plate 2. Therefore, when the length direction of the rectangular notch 22 is consistent with the length direction of the track plate 2, that is, the width of the rectangular notch 22 can be covered by the relatively narrow distance between the bearing rail table 4 and the track plate 2, the overall length of the track plate 2 will not be affected by the rectangular notch 22, so as to avoid interfering with the normal arrangement of the bearing rail table 4 on the surface of the track plate 2.

[0032] In some embodiments, please refer to Figure 3The through hole 21 is a cylindrical through hole, and when the intermediate layer 3 is poured, a formwork supporting operation of the intermediate layer 3 is required in advance, and the through hole 21 is used as a pouring channel after the formwork supporting operation is completed, and the rectangular notch 22 is used for exhaust and observation. It should be understood that the first boss 31 and the second boss 32 are integrally formed when the intermediate layer 3 is poured; preferably, the through hole 21 is a circular hole, and the second boss 32 corresponds to a cylindrical boss structure, so as to reduce stress concentration, and the first boss 31 and the second boss 32 are at the same height as the track slab 2, so that the first boss 31 and the second boss 32 are exposed and clear, and the intuitiveness and operability of maintenance and monitoring are improved, which is beneficial to timely and effective maintenance by the later work department.

[0033] In some embodiments, referring to Figure 2 The elastic buffer pad layer 6 is arranged between the through hole 21 and the first boss 31 and between each rectangular notch 22 and the second boss 32. By arranging the elastic buffer pad layer 6, the first boss 31 and the second boss 32 can be buffered, isolated and protected. Further, the two sides of the elastic buffer pad layer 6 are sealed by sealant, so as to prevent rainwater from entering the inside of the track structure.

[0034] In some embodiments, referring to Figure 2 The isolation pad layer 5 is arranged between the track slab 2 and the intermediate layer 3. It should be understood that the isolation pad layer 5 is provided with a plurality of notches to adapt to the first boss 31 and the second boss 32 on the top of the intermediate layer 3. The isolation pad layer 5 can separate the intermediate layer 3 from the track slab 2 during later maintenance, repair and replacement of the slab, and further effectively improve the efficiency of later maintenance, repair and replacement of the slab, and provide convenience for later vibration and noise reduction upgrading.

[0035] As a preferred technical solution, a plate joint is left between two adjacent groups of track slabs 2 to provide installation space for setting of grounding terminals, track crossing pipelines and other components. Specifically, the track overall structure is connected by a plurality of track slabs 2, a plate joint is left between adjacent track slabs 2, a grounding terminal is arranged at the plate joint position of the adjacent track slabs 2, and one grounding terminal is arranged on the left and right sides of each plate joint; at the same time, the track crossing pipelines of urban rail transit can pass through the plate joint position; in addition, track system drainage can be longitudinally drained through the plate joints on the two sides of the track slab 2.

[0036] In summary, the assembled ballastless track with a strip-shaped limit under the slab has the following technical advantages:

[0037] 1、the track overall structure of the utility model is composed of track plate and intermediate concrete layer and other parts, the main components of track can be designed by standardization, prefabricated in factory, using the design construction method of "dividing the whole into parts, then combining the parts into a whole", reducing the pouring amount of concrete on site, improving the construction quality and construction efficiency, and the track overall structure adopts the design of canceling the base, which can effectively save the construction cost; 2、the intermediate concrete layer of the utility model realizes the functions of supporting, leveling, adjusting the linear type and longitudinal and transverse limiting of track structure, especially the first boss arranged in the track plate and the second bosses arranged at the four corners of the plate, which enhances the longitudinal and transverse limiting effect of the track plate and effectively improves the overall stability of the track structure; 3、the track plate of the utility model is not interfered by the limiting structure, the bottom of the track plate is flat, and the single track plate is a regular rectangular plate, which is convenient for production, stacking, transportation and on-site assembly; 4、the elastic buffer layer of the utility model can buffer and isolate the first boss and the second boss for limiting, and simultaneously bond and isolate the layer between the track plate and the intermediate layer, which can realize the separation of the intermediate layer and the track plate, further effectively improve the efficiency of later maintenance and maintenance replacement, and provide convenience for later vibration and noise reduction upgrade.

[0038] Therefore, compared with the existing assembled ballastless track technology, the assembled ballastless track with strip limiting under the plate provided by the utility model has obvious technical advantages.

[0039] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, but 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 four corner limiting under the slab, which is arranged on a track foundation, characterized in that, The track foundation comprises several prefabricated track plates laid above the track foundation, the track plates are rectangular plates with a through hole in the center, and each of the four corners of the track plate is provided with a rectangular notch, wherein a middle layer is cast in the gap between the track plate and the track foundation, the top center of the middle layer is provided with a first boss capable of being inserted into the through hole, and a second boss capable of being inserted into the rectangular notch.

2. The assembled ballastless track according to claim 1, characterized in that, The bottom of the track plate is a flat surface, which is beneficial for on-site stacking and transportation.

3. The assembled ballastless track according to claim 1, characterized in that, The length direction of the rectangular notch is consistent with the length direction of the track plate.

4. The assembled ballastless track according to claim 1, characterized in that, The through hole is a cylindrical through hole, which is used as a pouring channel when the middle layer is cast, and the rectangular notch is used for exhaust and observation.

5. The assembled ballastless track according to claim 1, characterized in that, An elastic buffer pad layer is arranged between the through hole and the first boss, and between each rectangular notch and the second boss.

6. The assembled ballastless track according to claim 5, characterized in that, The two sides of the elastic buffer pad layer are sealed with sealant.

7. 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.

8. The assembled ballastless track according to claim 1, characterized in that, Eight pairs of rail supporting tables 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 pre-embedded on the top of the track foundation, so that the middle layer is integrated with the track foundation when cast.

10. The assembled ballastless track according to claim 1, characterized in that, A plate joint is left between two adjacent groups of track plates to provide installation space for the setting of grounding terminals and track crossing pipeline components.

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