Fabricated ballastless track and track construction method

Abstract

The invention discloses an assembly type ballastless track and a track construction method. The assembly type ballastless track comprises a track plate and a middle concrete layer, wherein the track plate is laid above a track foundation, and the middle concrete layer is poured in a gap between the track plate and the track foundation. Wherein the track plate is a rectangular section plate formed by inserting a first end plate and a second end plate with L-shaped sections; in addition, first through holes are formed in the two sides of the supporting legs, and second through holes are formed in the large panel. A first boss capable of being inserted into the first through hole is correspondingly arranged on the edge of the top of the middle concrete layer, a second boss capable of being inserted into the second through hole is arranged in the center of the top of the middle concrete layer, and longitudinal and transverse limiting of the track plate is achieved through the structure. The problems that an existing cast-in-place track is low in construction efficiency, concrete cast-in-place quality is difficult to control and the like are solved, and the problems that an existing assembly type track structure is large in transportation difficulty, poor in overall stability, difficult in plate replacement in the follow-up operation and maintenance stage and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of urban rail transit, and in particular to an assembled ballastless track and a track construction method. Background Art

[0002] In order to adapt to the large-scale construction of urban rail transit and better solve the various shortcomings of cast-in-place reinforced concrete roadbed structures, the application of prefabricated plate track has been proposed and promoted in many cities such as Beijing, Shanghai, Guangzhou, and Shenzhen. With the improvement of rail transit's green, environmental protection, energy saving, construction quality and quality, prefabricated plate track is the main development direction of urban rail transit in the future. At present, it can be seen from the existing assembled track structure that the assembled plate track technology generally has the following technical difficulties: 1. Due to the complexity of the horizontal and vertical sections of the line and the foundation structure under the track, there are a large number of special-shaped plates in the existing assembled plate track structure, resulting in low factory production efficiency. The structural dimensions of standard plates and special-shaped plates are different, which is not convenient for the stacking, transportation and on-site assembly of track plates; 2. Due to the high flatness requirements of the lower foundation of the assembled plate track, a cast-in-place adjustment layer is often used to adjust the linear shape of the track structure, resulting in a large amount of wet joint concrete pouring on site, although it is an assembled structure, and the construction process is complicated; 3. Due to the existence of the adjustment layer, the track structure has an interface between new and old concrete. After the line runs for a period of time, the interface debonding and separation between the prefabricated track plate and the adjustment layer are prone to occur, which will have an adverse effect on the stability and comfort of train operation and the life of the track structure. In view of this, in order to solve the above technical problems, the present invention aims to propose an assembled ballastless track and a track construction method. Summary of the invention

[0003] In order to overcome the technical problems described in the above-mentioned prior art, the object of the present invention is to provide an assembled ballastless track and a track construction method.

[0004] In a first aspect, the present invention provides an assembled ballastless track, which is arranged on a track foundation and comprises: A track plate is a rectangular section plate formed by plugging a first end plate and a second end plate with an L-shaped section, and the track plate is laid above the track foundation; and An intermediate concrete layer is poured in the gap between the track slab and the track foundation; Among them, the first end plate and the second end plate both include legs and a large panel, the legs are provided with first through holes on both sides, and the large panel is provided with a second through hole; the top edge of the intermediate concrete layer is correspondingly provided with a first boss that can be inserted into the first through hole, and the top center of the intermediate concrete layer is provided with a second boss that can be inserted into the second through hole.

[0005] As a preferred technical solution, an elastic buffer layer is bonded between the first through hole and the first boss, and between the second through hole and the second boss.

[0006] As a preferred technical solution, the inner wall of the first through hole and the inner wall of the second through hole are both sprayed with a certain thickness of elastic material.

[0007] As a preferred technical solution, the first through holes are opened at the edges of both sides of the supporting legs to form semicircular grooves, and the first boss is semi-cylindrical.

[0008] As a preferred technical solution, when the first end plate and the second end plate are plugged into each other, a first isolation cushion layer is provided between the two.

[0009] As a preferred technical solution, a second isolation pad layer is provided between the track slab and the intermediate concrete layer.

[0010] As a preferred technical solution, gate-shaped steel bars are pre-embedded in the top of the track foundation so that the intermediate concrete layer forms a whole with the track foundation when being poured.

[0011] As a preferred technical solution, a plate gap is left between two adjacent groups of the track plates in the assembled ballastless track to provide installation space for the arrangement of other components such as grounding terminals and track crossing pipelines.

[0012] In a second aspect, based on the above-mentioned assembled ballastless track, the present invention further provides a track construction method, comprising the following steps: Prefabricated end plates: prefabricating a first end plate and a second end plate, opening a first through hole and a second through hole, and spraying elastic material on the inner wall of the first through hole and the inner wall of the second through hole; Bonding the first isolation pad layer: bonding the first isolation pad layer at the pre-lapping position of the first end plate and the second end plate; Track foundation construction: install the track foundation mold and embed the gate-shaped steel bars, and cast the track foundation; Laying the track slab: positioning, plugging and fine-tuning the first end plate and the second end plate to complete the track slab laying, and bonding the second isolation pad layer to the bottom of the track slab; Construction of the middle concrete layer: installing the middle concrete layer mold, bonding the elastic buffer layer to the inner walls of the first through hole and the second through hole, pouring concrete through the second through hole to form the middle concrete layer; Track structure construction: Install rail supports on both sides of the top of the track slab, fix the rails on the rail supports with fasteners, and remeasure the track structure line shape.

[0013] As a preferred technical solution, when prefabricating the end plates, in order to achieve quick connection between the first end plate and the second end plate, the lengths of the first end plate and the second end plate are appropriately reduced; in order to ensure that the track plate has sufficiently large vertical bending stiffness, the cross-sectional dimensions of the first end plate and the second end plate are appropriately increased.

[0014] In summary, the present invention has the following technical effects: The present invention provides an assembled ballastless track and a track construction method, wherein the assembled ballastless track includes a track plate laid on top of the track foundation, and an intermediate concrete layer cast in the gap between the track plate and the track foundation; wherein the track plate is a rectangular section plate formed by plugging a first end plate and a second end plate with an L-shaped cross section; in addition, a first through hole is provided on both sides of the support leg, and a second through hole is provided on the large panel; a first boss that can be inserted into the first through hole is provided at the top edge of the intermediate concrete layer, and a second boss that can be inserted into the second through hole is provided at the top center of the intermediate concrete layer, and the track plate is limited in the vertical and horizontal directions by this structure. The assembled ballastless track and a track construction method using the present invention have the following technical advantages: 1. The overall track structure of the present invention is composed of rails, track plates and an intermediate concrete layer. The main track components can be standardized and prefabricated in factories. The design and construction method of "breaking the whole into parts" and then "integrating the parts into a whole" is adopted. It can be fully assembled at the construction site or in the factory, which reduces the amount of concrete poured on site, improves the construction quality and efficiency, and the overall track structure adopts a design that eliminates the base, which can effectively save construction costs; 2. The track plate of the present invention has stronger adaptability to small radius curves, reduces the use of existing special-shaped plates, and the prefabricated first end plate and second end plate are easier to replace in the event of damage on site, effectively reducing the workload of engineering maintenance; 3. The intermediate concrete layer of the present invention realizes the functions of supporting, leveling, adjusting the linear shape of the track structure and longitudinal and transverse limiting, effectively improving the overall stability of the track structure; 4. The second through holes of the track plate of the present invention can also serve as injection holes, while the first through holes at the four corners also serve as air holes and observation holes, which optimizes the pouring construction process of the middle concrete layer. At the same time, the middle concrete layer realizes the integrated construction of the adjustment layer and the limiting structure, simplifies the construction process, and improves the construction efficiency; 5. The present invention can play the role of buffering, isolating and protecting the first and second bosses that serve as limiting positions by bonding an elastic buffer pad layer to the inner walls of the first through hole and the second through hole. A first isolation pad layer is provided at the overlap of the first end plate and the second end plate, which can realize the separation of the first end plate and the second end plate. At the same time, a second isolation pad layer is bonded between the track plate and the middle concrete layer, which can realize the separation of the middle concrete layer and the track plate, further effectively improving the efficiency of later maintenance, repair and plate replacement, and also providing convenience for later vibration reduction and noise reduction upgrades. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1-1 It is a three-dimensional schematic diagram of an assembled ballastless track according to an embodiment of the present invention with rails hidden; Figure 1-2 is a three-dimensional schematic diagram of an assembled ballastless track according to an embodiment of the present invention; Figure 2 is a front view schematic diagram of an assembled ballastless track according to an embodiment of the present invention; Figure 3 is a three-dimensional schematic diagram of a first end plate of an embodiment of the present invention; Figure 4 is a three-dimensional schematic diagram of a first end plate of an embodiment of the present invention; Figure 5 is a three-dimensional schematic diagram of an intermediate concrete layer in an embodiment of the present invention; Figure 6 is a three-dimensional schematic diagram of a second isolation pad layer according to an embodiment of the present invention; The meanings of the reference numerals are as follows: 1-track plate, 11-first end plate, 111-leg, 112-large panel, 12-second end plate, 2-middle concrete layer, 21-first boss, 22-second boss, 31-first through hole, 32-second through hole, 4-track foundation, 51-first isolation pad, 52-second isolation pad, 6-rail support, 7-rail. DETAILED DESCRIPTION

[0017] The following will be combined with the accompanying drawings in this embodiment to clearly and completely describe the technical solution in this embodiment. The present embodiment described herein is only for illustrative purposes and is not intended to limit the scope of protection of the present invention. Therefore, it should be understood that various modifications and changes can be made to this embodiment without departing from the scope of protection of the present invention. In the description of the present invention, unless otherwise clearly specified and limited, the term "and / or" includes any and all combinations of one or more associated listed items. Unless otherwise specified or explained, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Further, in the description of the present invention, it should be understood that the directional words described in the present embodiment are described at the angles shown in the accompanying drawings and should not be understood as limiting the present embodiment. It should also be understood that in the context, when it is mentioned that an element or feature is connected to another element (one or more), it can not only be directly connected to the other (one or more) elements, but also indirectly connected to the other (one or more) elements through an intermediate element.

[0018] Before introducing the technical solution of the present invention, it is necessary to explain the background of the invention. It is common that with the improvement of green environmental protection, energy saving, construction quality and quality of rail transit, assembled plate track is the main development direction of urban rail transit in the future. The existing assembled plate track technology has the following technical difficulties: 1. Due to the complexity of the horizontal and longitudinal sections of the line and the foundation structure under the track, there are a large number of special-shaped plates in the existing assembled plate track structure, resulting in low factory production efficiency. The structural dimensions of standard plates and special-shaped plates are different, which is not convenient for the stacking, transportation and on-site assembly of track plates; 2. Due to the high flatness requirements of the lower foundation of the assembled plate track, a cast-in-place adjustment layer is often used to adjust the linear shape of the track structure, resulting in a large amount of on-site wet joint concrete pouring on site, although it is an assembled structure, and the construction process is complicated; 3. Due to the existence of the adjustment layer, there is an interface between new and old concrete in the track structure. After the line has been running for a period of time, the interface debonding and separation between the prefabricated track plate and the adjustment layer are prone to occur, which will have an adverse effect on the stability and comfort of train operation and the life of the track structure. In order to overcome the technical problems of the prior art mentioned above, the present invention aims to provide an assembled ballastless track and a track construction method.

[0019] First, see Figure 1-1 to Figure 6An exemplary embodiment of the present invention provides an assembled ballastless track, which includes a track plate 1 laid on a track foundation 4, and an intermediate concrete layer 2 cast in a gap between the track plate 1 and the track foundation 4; wherein the track plate 1 is a rectangular section plate formed by plugging a first end plate 11 and a second end plate 12 with an L-shaped cross section. It should be understood that the first end plate 11 and the second end plate 12 have the same outer contour so that they can be plugged into a track plate 1 with a rectangular cross section. In order to achieve the longitudinal and transverse positioning of the track plate 1, the following positioning structure is arranged between the track plate 1 and the middle concrete layer 2: a first through hole 31 is provided on both sides of the support leg 111, and a second through hole 32 is provided on the large panel 112; a first boss 21 capable of being inserted into the first through hole 31 is provided correspondingly at the top edge of the middle concrete layer 2, and a second boss 22 capable of being inserted into the second through hole 32 is provided at the top center of the middle concrete layer 2. It should be noted that when the first end plate 11 and the second end plate 12 are plugged in, the second through holes 32 of the first end plate 11 and the second end plate 12 overlap and communicate with each other. Therefore, the track plate 1 with a rectangular cross section is formed by plugging the first end plate 11 and the second end plate 12, and each first through hole 31 of the first end plate 11 and the second end plate 12 is inserted with the first boss 21, and the second through holes 32 of the first end plate 11 and the second end plate 12 overlap and are inserted with the second boss 22. The longitudinal and transverse positioning of the track plate 1 is achieved by the first boss 21 and the second boss 22, which effectively improves the overall stability of the track structure.

[0020] The overall track structure of the present invention is composed of rails, track plates 1 and an intermediate concrete layer 2. The main track components can be standardized and prefabricated in factories. The design and construction method of first "breaking the whole into parts" and then "assembling the parts into a whole" is adopted. The track can be fully assembled at the construction site or in the factory, which reduces the amount of concrete poured on site, improves the construction quality and efficiency, and the overall track structure adopts a design that eliminates the base, which can effectively save construction costs.

[0021] It should be understood that the track of the present invention is composed of a plurality of track plates 1, which has stronger adaptability to small radius curves and reduces the use of existing special-shaped plates. The prefabricated first end plate 11 and the second end plate 12 are easier to replace in case of damage on site, effectively reducing the workload of engineering maintenance.

[0022] In some embodiments, an elastic buffer layer is bonded between the first through hole 31 and the first boss 21, and between the second through hole 32 and the second boss 22. The purpose of adopting such a design is to provide an elastic buffer layer to buffer, isolate and protect the first boss 21 and the second boss 22. The elastic buffer layer and the track plate 1 and the first boss 21 and the second boss 22 are sealed with a sealant to prevent rainwater from entering the track structure.

[0023] In some embodiments, the inner wall of the first through hole 31 and the inner wall of the second through hole 32 are sprayed with a certain thickness of elastic material. For example, the inner wall of the first through hole 31 and the inner wall of the second through hole 32 can be sprayed with a certain thickness of polymer material such as polyurethane to play an isolation and buffering role.

[0024] In some embodiments, see Figure 1-1 , Figure 1-2 and Figure 5 , the second boss 22 is preferably a cylindrical boss structure, the second boss 22 is a main limiting boss, and each second boss 22 of the track plate 1 is a secondary limiting boss. The intermediate concrete layer 2 of the present invention and the first boss 21 and the second boss 22 on the top thereof realize the functions of supporting, leveling, adjusting the linear shape of the track structure and longitudinal and transverse limiting, and effectively improve the overall stability of the track structure. Preferably, in some embodiments, the first through hole 31 is opened on the edges of both sides of the support leg 111 to form a semicircular groove, and the first boss 21 is correspondingly semi-cylindrical to cooperate with the semicircular groove. The purpose of adopting such a design is that the second boss 22 is a secondary limiting boss and its size can be appropriately reduced, so as to ensure the integrity of the structure on both sides of the track plate 1 as much as possible, and not interfere with the subsequent processes of installing the rail support 6 and the rail 7 on the top of the track plate 1.

[0025] Further, in some embodiments, see Figure 1-1 and Figure 2 When the first end plate 11 and the second end plate 12 are plugged together, a first isolation cushion layer 51 is provided between the two; further, a second isolation cushion layer 52 is provided between the track plate 1 and the intermediate concrete layer 2. Figure 6 The purpose of adopting such a design is to facilitate the separation of the first end plate 11 from the second end plate 12, and the separation of the track plate 1 as a whole from the middle concrete layer 2, which effectively reduces the workload of engineering maintenance, can greatly improve the efficiency of later maintenance and replacement of plates, and also provide convenience for later vibration reduction and noise reduction upgrades.

[0026] As a preferred technical solution, gate-shaped steel bars are pre-embedded in the top of the track foundation 4. The purpose of adopting such a design is to enable the intermediate concrete layer 2 to form a whole with the track foundation 4 during pouring, effectively enhance the connection between the track foundation 4 and the track structure, and further ensure the overall stability of the track structure.

[0027] As a preferred technical solution, please refer to Figure 1-1 and Figure 1-2There is a plate gap between two adjacent groups of track plates 1 in the assembled ballastless track to provide installation space for the installation of other components such as grounding terminals and rail-crossing pipelines. Specifically, the overall track structure is connected by a number of track plate 1 structural units, and there is a plate gap between adjacent track plates 1. The grounding terminal is set at the plate gap position of the adjacent track plates 1, and a grounding terminal is set on the left and right sides of each plate gap; at the same time, the rail-crossing pipeline of the urban rail transit can pass through this plate gap position to pass the track; in addition, the drainage of the track system can be drained longitudinally through the plate gaps on both sides of the track plate 1.

[0028] In a second aspect, based on the above-mentioned assembled ballastless track, the present invention further provides a track construction method, comprising the following steps: Step 1, prefabricating the end plate: prefabricating the first end plate and the second end plate, opening the first through hole and the second through hole, and spraying the elastic material on the inner wall of the first through hole and the inner wall of the second through hole; It should be noted that the first end plate and the second end plate are ordinary reinforced concrete structures with a concrete grade of C40, and are arranged with upper and lower layers of steel bars. They are prefabricated in the factory and then transported to the construction site for installation and laying. In some embodiments, a single standard track plate is 4660 mm long, 2300 mm wide, and 200 mm high, and is provided with a first through hole and a second through hole. The first through hole is preferably a semicircular groove structure with a radius of 50 mm, and the second through hole is preferably a circular through hole with a radius of 200 mm. Elastic material is sprayed on the inner wall of the first through hole and the inner wall of the second through hole to play an isolation and buffering role.

[0029] Step 2, bonding the first isolation cushion layer: bonding the first isolation cushion layer at the pre-lapping position of the first end plate and the second end plate, so as to facilitate the separation of the first end plate from the second end plate during subsequent maintenance; Step 3: Track foundation construction: Install the track foundation mold and embed gate-shaped steel bars, and cast to form the track foundation. The purpose of this embedded gate-shaped steel bar is to form a whole with the track foundation during the subsequent pouring of the intermediate concrete layer, effectively enhancing the connection between the track foundation and the track structure, and further ensuring the overall stability of the track structure.

[0030] Step 4: Laying the track slab: Position, plug in, and fine-tune the first end plate and the second end plate to complete the track slab laying, and bond the second isolation pad layer to the bottom of the track slab to facilitate the separation of the track slab as a whole from the middle concrete layer during subsequent engineering maintenance. This effectively reduces the workload of engineering maintenance, can greatly improve the efficiency of subsequent maintenance and plate replacement, and also provides convenience for subsequent vibration reduction and noise reduction upgrades.

[0031] Step 5, construction of the middle concrete layer: installing the middle concrete layer mold, bonding the elastic buffer layer to the inner walls of the first through hole and the second through hole, pouring concrete through the second through hole to form the middle concrete layer; The elastic buffer layer is as high as the track plate and 20 mm thick, and is used for buffering, isolating and protecting the first boss and the second boss. In addition, the elastic buffer layer and the track plate and the first boss and the second boss are sealed with sealant to prevent rainwater from entering the track plate structure. It should be noted that this track structure cancels the base plate design, and casts an intermediate concrete layer under the overall track structure after the first end plate and the second end plate are assembled. The intermediate concrete layer is directly connected to the track foundation through the gate-shaped steel bars in step 3, which plays a role in leveling and adjusting the linear shape of the track structure. Among them, when casting the intermediate concrete layer, the second through holes connected in the track plate are used for pouring, and the first through holes at the four corners of the track plate are used as vents and observation holes during casting construction, which optimizes the casting construction process of the intermediate concrete layer; After the middle concrete layer is poured, the first boss of the reinforced concrete structure is formed from the first through hole, and the second boss of the reinforced concrete structure is formed from the second through hole. When the middle concrete layer reaches a certain strength, the formwork is removed. The middle concrete layer realizes the integrated construction of the adjustment layer and the limit structure, simplifies the construction process, and improves the construction efficiency. The key structures of the first boss and the second boss are exposed and clearly visible, which improves the intuitiveness and operability of maintenance and monitoring, and is conducive to timely and effective maintenance by the engineering department.

[0032] Step 6, track structure construction: Install rail supports on both sides of the top of the track plate, fix the rails on the rail supports through fasteners, and re-measure the track structure line shape. Since the tracks in urban rail transit often use 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, in some embodiments, a track plate structure with rail supports is adopted; eight pairs of rail supports are arranged on a single track plate, and the fasteners use the fastener type that matches the track plate.

[0033] As a preferred technical solution, when prefabricating the end plates, in order to achieve quick connection between the first end plate and the second end plate, the lengths of the first end plate and the second end plate are appropriately reduced; in order to ensure that the track plate has sufficiently large vertical bending stiffness, the cross-sectional dimensions of the first end plate and the second end plate are appropriately increased.

[0034] In summary, the assembled ballastless track and track construction method of the present invention have the following technical advantages: 1. The overall track structure of the present invention is composed of rails, track plates and an intermediate concrete layer. The main track components can be standardized and prefabricated in factories. The design and construction method of "breaking the whole into parts" and then "integrating the parts into a whole" is adopted. The track can be fully assembled at the construction site or in the factory, which reduces the amount of concrete poured on site, improves the construction quality and efficiency, and the overall track structure adopts the design of eliminating the base, which can effectively save construction costs; 2. The track plate of the present invention has stronger adaptability to small radius curves, which reduces the use of existing special-shaped plates. The prefabricated first end plate and the second end plate are easier to replace in case of damage on site, which effectively reduces the workload of engineering maintenance; 3. The intermediate concrete layer of the present invention realizes the functions of supporting, leveling, adjusting the linear shape of the track structure and longitudinal and transverse limiting, which effectively improves the overall stability of the track structure; 4. The second through hole of the track plate of the present invention can also be used as a pouring hole, and the first through holes at the four corners can also be used as air holes and observation holes, which optimizes the pouring construction process of the middle concrete layer. At the same time, the middle concrete layer realizes the integrated construction of the adjustment layer and the limiting structure, simplifies the construction process, and improves the construction efficiency; 5. The present invention can play the role of buffering, isolating and protecting the first boss and the second boss that serve as limiters by bonding an elastic buffer pad layer to the inner walls of the first through hole and the second through hole. A first isolation pad layer is provided at the overlap of the first end plate and the second end plate, which can achieve separation of the first end plate from the second end plate. At the same time, a second isolation pad layer is bonded between the track plate and the middle concrete layer, which can achieve separation of the middle concrete layer from the track plate, further effectively improving the efficiency of later maintenance, repair and plate replacement, and also providing convenience for later vibration reduction and noise reduction upgrades.

[0035] Therefore, compared with the existing assembled track technology, the assembled ballastless track and track construction method provided by the present invention have obvious technical advantages.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembled ballastless track, arranged on a track foundation, characterized in that: include: The track plate is a rectangular section plate formed by plugging a first end plate and a second end plate with an L-shaped cross section, and the track plate is laid above the track foundation; as well as, An intermediate concrete layer is poured in the gap between the track slab and the track foundation; Among them, the first end plate and the second end plate both include legs and a large panel, the legs are provided with first through holes on both sides, and the large panel is provided with a second through hole; the top edge of the intermediate concrete layer is correspondingly provided with a first boss that can be inserted into the first through hole, and the top center of the intermediate concrete layer is provided with a second boss that can be inserted into the second through hole.

2. The assembled ballastless track according to claim 1, characterized in that: An elastic buffer layer is bonded between the first through hole and the first boss, and between the second through hole and the second boss.

3. The assembled ballastless track according to claim 2, characterized in that: The inner wall of the first through hole and the inner wall of the second through hole are both sprayed with elastic material of a certain thickness.

4. The assembled ballastless track according to claim 3, characterized in that: The first through holes are opened at the edges of both sides of the supporting legs to form semicircular grooves, and the first boss is semi-cylindrical.

5. The assembled ballastless track according to claim 1, characterized in that: When the first end plate is plugged into the second end plate, a first isolation cushion layer is provided between the two.

6. The assembled ballastless track according to claim 1, characterized in that: A second isolation pad layer is provided between the track slab and the middle concrete layer.

7. The assembled ballastless track according to claim 1, characterized in that: Gate-shaped steel bars are pre-embedded on the top of the track foundation so that the intermediate concrete layer forms an integral whole with the track foundation when being poured.

8. The assembled ballastless track according to claim 1, characterized in that: A plate gap is left between two adjacent groups of track plates in the assembled ballastless track to provide installation space for the arrangement of other components such as grounding terminals and track crossing pipelines.

9. A track construction method, characterized in that: The assembled ballastless track according to any one of claims 1 to 8 is characterized in that it comprises the following steps: Prefabricated end plates: prefabricating a first end plate and a second end plate, opening a first through hole and a second through hole, and spraying elastic material on the inner wall of the first through hole and the inner wall of the second through hole; Bonding the first isolation pad layer: bonding the first isolation pad layer at the pre-lapping position of the first end plate and the second end plate; Track foundation construction: install the track foundation mold and embed the gate-shaped steel bars, and cast the track foundation; Laying the track slab: positioning, plugging and fine-tuning the first end plate and the second end plate to complete the track slab laying, and bonding the second isolation pad layer to the bottom of the track slab; Construction of the middle concrete layer: installing the middle concrete layer mold, bonding the elastic buffer layer to the inner walls of the first through hole and the second through hole, pouring concrete through the second through hole to form the middle concrete layer; Track structure construction: Install rail supports on both sides of the top of the track slab, fix the rails on the rail supports with fasteners, and remeasure the track structure line shape.

10. The track construction method according to claim 9, characterized in that: When prefabricating the end plates, in order to achieve quick connection between the first end plate and the second end plate, the length of the first end plate and the second end plate is appropriately reduced; in order to ensure that the track plate has sufficient vertical bending stiffness, the cross-sectional dimensions of the first end plate and the second end plate are appropriately increased.

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