Fabricated ballastless track with inclined 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, the section of the bottom of each track board is in a swallow tail shape, namely, each track board is provided with two inclined faces inclining towards the bottom ends of the two sides, a through hole is formed in the center of each track board, and inserting grooves are formed in the two ends of each track board. A middle layer is poured in a gap between the track plate and the track foundation, and three sets of limiting tables capable of being inserted into the through holes and the inserting grooves are arranged at 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 middle concrete layer achieves the effects of supporting, leveling, rail structure linetype adjustment and longitudinal and transverse limiting, the limiting boss is arranged to be an arc-shaped chamfered rectangular boss so that stress concentration can be avoided, the two inclined faces at the bottom end of the rail plate are convenient for vibrating concrete when the middle layer is poured in an inclined inserting mode, and the construction quality of concrete under the plate is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to urban rail transit technical field, concretely relates to a kind of assembled ballastless track of board under inclination. BACKGROUND

[0002] Currently urban rail transit mainly uses cast-in-place track structure, which has many drawbacks such as slow construction progress, large amount of concrete pouring on site, many cracks in cast-in-place bed and difficult to control, difficult to maintain, difficult to guarantee vibration reduction effect and so on. 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 future urban rail transit. As known from the existing assembled track structure, the track slab bottom of the assembled track structure is usually provided with a cast-in-place concrete layer. For self-compacting concrete, the quality of on-site pouring is difficult to control. For ordinary concrete, the track slab bottom is a flat surface, which is not conducive to the vibration of ordinary concrete during pouring, thereby resulting in poor construction quality of the cast-in-place concrete layer under the slab, a series of problems such as foam layer and low slump retention performance. Moreover, the existing assembled track structure has insufficient limiting structure design, and the overall stability is poor. In addition, the weight of the single track slab of the existing assembled track structure is too large, which is not convenient for production, manufacturing, stacking, transportation and on-site assembly. Therefore, the utility model aims to provide a kind of assembled ballastless track of board under inclination 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 kind of assembled ballastless track of board under inclination.

[0004] The utility model relates to a kind of assembled ballastless track of board under inclination, which is arranged on track foundation, comprising a plurality of precast track slabs laid above the track foundation, the cross section of the track slab bottom is dovetail-shaped, that is, the track slab has two inclined surfaces inclined towards the bottom ends of both sides, the track slab center is provided with a through hole, both ends of the track slab are provided with a slot, the gap between the track slab and the track foundation is poured with an intermediate layer, and the top of the intermediate layer is provided with three sets of limiting bosses which can be inserted into the through hole and the slot.

[0005] As a preferred technical solution, the through hole and the two slots are arranged in a straight line, and the overall length of the through hole and the two slots is greater than half the length of the track slab.

[0006] As a preferred technical solution, the limiting boss is a chamfered rectangular boss.

[0007] As a preferred technical solution, the inclined surface extends to the side edge of the track slab.

[0008] Preferably, the through hole and the two insertion slots are both provided with elastic buffer pads between the limiting boss.

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

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

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

[0012] Preferably, a door-shaped steel bar is embedded on the top of the track foundation, so that the intermediate layer is integrally formed with the track foundation when pouring.

[0013] Preferably, a plate joint is left between two adjacent groups of track plates, so as to provide installation space for setting ground terminals, track crossing 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 inclination's assembled ballastless track, be located on track foundation, including several prefabricated track slab being laid on track foundation top, track slab bottom section is swallowtail, i.e., track slab has two inclined planes inclined to two side bottom ends, track slab center is equipped with through hole, track slab both ends are equipped with insertion slot, gap between track slab and track foundation two pours in intermediate layer, intermediate layer top is equipped with three groups of limiting boss that can be inserted into through hole and insertion slot.Using the structure of a kind of slab under inclination's assembled ballastless track, with following technical effects:1, the track overall structure of the utility model is composed of track slab and intermediate concrete layer etc., track main component can be by using standardization design, factory prefabrication, using first "divide into small parts", then "collect zero for whole" design construction method, 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 track overall structure adopts cancel base design and can 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 limiting, i.e., three groups of limiting boss and track slab coupling effect, limit track slab longitudinal and transverse movement, improve the overall stability of track structure, especially limiting boss is set as arc-shaped chamfered rectangular boss, to avoid stress concentration;3, the track slab of the utility model has two inclined planes inclined to two side bottom ends, facilitate intermediate layer pouring through through hole or insertion slot inclined insertion to plate under concrete vibration, solve the problem that ordinary concrete needs to be vibrated compared with self-compacting concrete in site, replace self-compacting concrete by ordinary concrete, avoid a series of problems such as foam layer, low slump resistance performance when self-compacting concrete is poured in site, save cost greatly;Meanwhile, intermediate layer realizes the integration of adjusting layer and limiting structure construction, simplifies construction process, improves construction efficiency;4, the elastic buffer pad layer of the utility model can play the role of buffering isolation and protecting cylindrical boss that does limiting, simultaneously bonding isolation pad between track slab and intermediate layer, can realize the separation of intermediate layer and track slab, further effectively improve post-maintenance maintenance and replacement efficiency, also provide convenience for post-stage vibration reduction and noise reduction upgrade;5, the bottom of the track slab of the utility model is swallowtail, beneficial to rainwater entering track slab later can be discharged along isolation pad inclined downward direction, effectively ensure the durability of isolation pad and intermediate layer.Therefore, compared with existing assembled ballastless track technology, the slab under inclination's assembled ballastless track 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 prior art, the following will briefly introduce the drawings needed to be used in embodiment or 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 is a three-dimensional structure schematic diagram of the assembled ballastless track of the embodiment of the present application;

[0018] Figure 2 is a partial explosion structure schematic diagram of the assembled ballastless track of the embodiment of the present application;

[0019] Figure 3 is a cross-sectional schematic diagram of the track slab of the embodiment of the present application;

[0020] Figure 4 is a three-dimensional schematic diagram of the track slab of the embodiment of the present application;

[0021] In the drawings, the following notations apply:

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

[0023] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments. The embodiments described in the description are merely for illustrative purposes, and are not intended to limit the protection scope of the present application, and 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: 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, difficult to guarantee vibration reduction effect and the like. 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 is known that the track slab bottom of the assembled track structure is usually provided with a cast-in-place concrete layer, for the on-site pouring quality of self-compacting concrete, it is difficult to control, for ordinary concrete, the track slab bottom is a flat surface, which is not conducive to the vibration of ordinary concrete pouring, thereby the construction quality of the cast-in-place concrete layer under the slab is poor, there are a series of problems such as foam layer and low slump retention performance; and the limiting structure design of the existing assembled track structure is insufficient, the overall stability is poor; in addition, the weight of the single track slab of the existing assembled track structure is too large, which is not convenient for production, manufacturing, stacking, transportation and on-site assembly.

[0027] Please refer to Figures 1 to 4 The utility model example embodiment provides a kind of assembled ballastless track of slab inclination, it is located on track foundation 1, including several precast track slab 2 being laid above track foundation 1, track slab 2 bottom section is swallowtail, as shown in Figure 3 Two inclined surfaces of track slab 2 have two inclined surfaces to two side bottom ends, track slab 2 center is equipped with through hole 21, both ends of track slab 2 are equipped with slot 22, this track slab 2 can be by using standardization design, factory precast, reduce the pouring amount of on-site concrete, improve construction quality and construction efficiency;Track slab 2 and the gap between track foundation 1 two Pouring intermediate layer 3, intermediate layer 3 top is equipped with three groups of limiting boss that can be inserted into through hole 21 and slot 22.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 3, specifically, the three groups of limiting boss on the top of intermediate layer 3 cooperate with the through hole 21 and slot 22 of track slab 2 to realize longitudinal and transverse limiting function, i.e. limit track slab 2 rotation and longitudinal and transverse movement, jointly guarantee the overall stability of track structure, limiting boss includes first boss 31 in plate and second boss 32 at both ends of plate, and it is all reinforced concrete structure, concrete grade C40, and is formed as a whole by continuous pouring with intermediate layer 3, and is connected with lower track foundation 1 by portal reinforcing steel to form a whole, further guarantee the overall stability of structure.

[0028] It can be understood that the overall structure of the assembled ballastless track of the utility model is composed of track plates 2 and intermediate concrete layers, and the main track components can be designed by standardization and prefabricated in a factory, the design and construction method of "dividing the whole into parts and then combining the parts into a whole" is adopted, the construction quality and efficiency are improved, and the overall structure of the track adopts the design of canceling the base, which greatly reduces the overall weight of the track structure and can effectively save the construction cost.

[0029] As a preferred technical scheme, a plate joint is left between the two adjacent groups of track plates 2 to provide installation space for the setting of grounding terminals, track-crossing pipelines and other components. Specifically, the overall track structure is connected by a plurality of track plates 2, a plate joint is left between the adjacent track plates 2, the grounding terminals are arranged at the plate joint positions of the adjacent track plates 2, and one grounding terminal is arranged on each of 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 track at the plate joint positions; in addition, the track system drainage can be longitudinally drained through the plate joints on both sides of the track plates 2.

[0030] It should be noted that the bottom of the track plate 2 is dovetail-shaped, and such a design is adopted to facilitate the oblique insertion of a vibrator into the plate for vibration work when the intermediate layer 3 is poured with ordinary concrete, so that the ordinary concrete under the plate is fully vibrated, the problem of needing to vibrate ordinary concrete on site compared with self-compacting concrete is solved, the ordinary concrete is used to replace the self-compacting concrete, a series of problems such as the existence of a foam layer and low slump retention performance during the pouring of the self-compacting concrete on site are effectively solved, and the cost is greatly saved.

[0031] In some embodiments, referring to Figure 4 , the through hole 21 and the two insertion grooves 22 are arranged in straight lines, and the overall length of the through hole 21 and the two insertion grooves 22 is greater than half the length of the track plate 2, such a design can reduce the overall weight of a single track plate 2 and is more conducive to the transportation of the track plate 2. In some other embodiments, the through hole 21 in the center of the track plate 2 can be removed, and the insertion grooves 22 at both ends of the track plate 2 can be expanded, so as to further reduce the weight of the track plate 2 while meeting the function of longitudinal and lateral limiting.

[0032] In some embodiments, referring to Figure 2 , the limiting boss is a chamfered rectangular boss, three groups of limiting bosses are coupled with the track plate 2 to limit the longitudinal and lateral movement of the track plate 2, and the overall stability of the track structure is improved, the limiting boss is arranged in the form of an arc-shaped chamfered rectangular boss to avoid stress concentration and damage to the boss, thereby damaging the stability of the overall track structure.

[0033] Preferably, referring to Figure 2The through hole 21 and the two insertion grooves 22 are both provided with an elastic buffer pad 6 between the limiting boss. By arranging the elastic buffer pad 6, the limiting boss can be buffered and isolated and protected.

[0034] In some embodiments, referring to Figure 2 An isolation pad 5 is arranged between the track plate 2 and the intermediate layer 3. It should be understood that the isolation pad 5 is provided with a plurality of notches to adapt to the limiting boss of the intermediate layer 3. The isolation pad 5 can separate the intermediate layer 3 from the track plate 2 during later maintenance and repair and replacement of the track plate, thereby effectively improving the efficiency of later maintenance and repair and replacement of the track plate and providing convenience for later vibration and noise reduction upgrades. As a preferred technical solution, the thickness of the isolation pad 5 is 10-20 mm.

[0035] In some embodiments, referring to Figure 3 The inclined surface extends to the side edge of the track plate 2. By adopting such a design, when the sealant at the limiting boss fails later, the rainwater entering the track plate 2 can be discharged out of the track plate 2 along the inclined downward direction of the isolation pad 5, thereby effectively ensuring the durability of the isolation pad 5 and the intermediate layer 3.

[0036] In some embodiments, since the track in urban rail transit often uses direct current, direct current leakage and electrochemical corrosion are easily caused. In order to meet the insulation performance requirements of urban rail transit, a track plate 2 structure with a bearing rail table 4 type is preferably adopted. Preferably, referring to Figure 1 and Figure 2 Eight pairs of bearing rail tables 4 are arranged on the top of the track plate 2.

[0037] As a preferred technical solution, the track foundation 1 is pre-buried with a steel bar, so that the intermediate layer 3 is integrally formed with the track foundation 1 when being poured. By adopting such a design, the intermediate layer 3 is integrally formed with the track foundation 1 when being poured, thereby effectively enhancing the connection between the track foundation 1 and the track structure, forming a stable force transmission system of the track structure from the track surface to the lower foundation, and further ensuring the overall stability of the track structure.

[0038] In summary, the assembled ballastless track with a downward inclined plate has the following technical advantages:

[0039] 1. The track overall structure of the utility model is composed of track plate and intermediate concrete layer and the like, the main components of the track can be designed by standardization, prefabricated in factory, the design and construction method of "dividing the whole into parts, then integrating the parts into a whole" can be adopted, the track overall structure can be obtained by full assembly in construction site or factory, the pouring amount of concrete in site is reduced, the construction quality and efficiency are improved, and the construction cost can be effectively saved by adopting the design of canceling the base of the track overall structure;

[0040] 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 the track structure, that is, the coupling effect of the three sets of limiting bosses and the track plate limits the longitudinal and transverse movement of the track plate, and the overall stability of the track structure is improved, and in particular, the limiting bosses are provided as arc-shaped chamfered rectangular bosses to avoid stress concentration;

[0041] 3. The track plate of the utility model has two inclined surfaces inclined towards the bottom ends of the two sides, which facilitates the inclined insertion of the intermediate layer pouring through the through holes or the slots to vibrate the concrete under the plate, solves the problem that the ordinary concrete needs to be vibrated on site compared with the self-compacting concrete, replaces the self-compacting concrete with the ordinary concrete, avoids a series of problems such as the existence of foam layer and low slump retention performance during the site self-compacting concrete pouring, and greatly saves the cost; 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;

[0042] 4. The elastic buffer cushion layer of the utility model can buffer and isolate and protect the cylindrical bosses for limiting, simultaneously bonds and isolates the cushion layer between the track plate and the intermediate layer, can realize the separation of the intermediate layer and the track plate, further effectively improves the efficiency of the later maintenance and maintenance replacement of the plate, and provides convenience for the later vibration reduction and noise reduction upgrade;

[0043] 5. The bottom of the track plate is dovetail-shaped, which is beneficial to the rainwater entering the track plate later to be discharged along the inclined downward direction of the isolation cushion layer, and effectively ensures the durability of the isolation cushion layer and the intermediate layer.

[0044] Therefore, compared with the existing heat exchanger technology of the thermal power plant, the eccentric spiral heat exchanger provided by the utility model has obvious technical advantages.

[0045] Finally, it should be pointed out that: the above embodiments 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 embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; 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. A prefabricated ballastless track with an under-plate inclination, which is arranged on a track foundation, characterized in that The track foundation comprises several prefabricated track plates laid above the track foundation, the bottom section of the track plate is dovetail-shaped, that is, the track plate has two inclined surfaces inclined towards the two side ends of the bottom, the center of the track plate is provided with a through hole, both ends of the track plate are provided with a slot, the gap between the track plate and the track foundation is poured with an intermediate layer, and the top of the intermediate layer is provided with three sets of limiting bosses capable of being inserted into the through hole and the slot.

2. The assembled ballastless track according to claim 1, characterized in that, The through hole and the two slots are linearly arranged, and the overall length of the through hole and the two slots is greater than half of the length of the track plate.

3. The assembled ballastless track according to claim 1, characterized in that, The limiting boss is a chamfered rectangular boss.

4. The assembled ballastless track according to claim 1, characterized in that, The inclined surface extends to the side edge of the track plate.

5. The assembled ballastless track according to claim 1, characterized in that, The through hole and the two slots are arranged with elastic buffer pad layers between the limiting bosses.

6. The assembled ballastless track according to claim 5, characterized in that, The elastic buffer pad layers are sealed on both sides by 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 intermediate layer.

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, Door-shaped steel bars are pre-embedded on the top of the track foundation, so that the intermediate layer is integrated with the track foundation when being poured.

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-rail pipelines.

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