Assembly type ballastless track with detachable assembly track bearing table

Abstract

The utility model discloses an assembly type ballastless track with a detachable assembly track bearing platform, which comprises the track bearing platform, a track plate and a base, the track bearing platform comprises a plurality of track bearing platform single bodies with prefabricated structures, each track bearing platform single body is fixed with the track plate through an anchor bolt, and the height of each track bearing platform single body is selected as required. The rail bearing table single bodies are rail bearing tables with retaining shoulders or rail bearing tables without retaining shoulders, rectangular blocks are arranged on the lower portions of the rail bearing tables, and anchor bolts are arranged at the four corners of each rectangular block. The assembly type rail bearing platform is safe in structure and controllable in precision, the self-compacting concrete base is cast in place, construction errors of a lower foundation in the construction period can be made up, construction precision of a rail structure is guaranteed, and the assembly type rail bearing platform can be standard, height-adjustable, rail-direction-adjustable, special-shaped and other products of different specifications. In the operation period, vertical and transverse deviation adjustment of the track structure can be achieved by disassembling and replacing the track bearing table system, and the smoothness of the track structure is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of railway ballastless track, and in particular relates to a prefabricated ballastless track with a detachable and assembleable rail support platform. Background Technology

[0002] With the continuous development of my country's railways, ballastless track is widely used in high-speed railways, intercity railways, suburban railways, and urban rail transit. Ballastless track technology is also becoming more and more mature. Compared with ballasted track, ballastless track has stronger overall structure, better stability, and significantly reduced maintenance workload and costs. However, the shortcomings of ballastless track are also gradually becoming apparent. Due to the limitation of the height adjustment of fasteners, the adjustment range of track level, elevation, and direction is very limited, and the technical requirements for the substructure are very high.

[0003] Slab track and twin-block track are common track structure types for high-speed railway ballastless tracks. Slab track typically consists of rails, elastic fasteners, precast track slabs, a self-compacting concrete layer (or mortar conditioning layer), a reinforced concrete base, a separating layer, and an elastic cushion layer, forming a three-layer structure. This structure is complex, involves a large amount of engineering work, and is difficult to maintain and repair later. Twin-block track typically consists of rails, elastic fasteners, a cast-in-place track slab, a reinforced concrete base, a separating layer, and an elastic cushion layer. Although it is a two-layer structure, both are cast-in-place structures, making it difficult to guarantee construction quality and prone to construction deviations. Currently, existing ballastless track structures have the track platform and track slab (ballast bed slab) as a single unit, which can only be adjusted for track height and alignment using fasteners. This generally has the disadvantage of poor adjustment capability for elevation and alignment. If the elevation or alignment deviation exceeds the adjustment capability of the fasteners during the construction and operation periods, it often needs to be demolished and rebuilt. This involves a large amount of construction work, complicated procedures, huge economic investment, and may also affect railway operation.

[0004] With the large-scale development of high-speed rail construction in my country, passenger dedicated lines inevitably cross sections with special geological conditions, such as active fault zones and areas with severe ground subsidence. Currently, ballasted track is commonly used in sections with adverse geological conditions, resulting in a large workload for maintenance and repair, which is not conducive to the promotion and use of ballastless track. For ballastless track to develop, the challenge of large deformation of the substructure must be addressed directly, necessitating the development of a ballastless track structure system with large adjustment capabilities, factory production capabilities, and engineering assembly capabilities. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a prefabricated ballastless track structure with a highly modular structure, small amount of concrete pouring on site, convenient construction, and quick disassembly and assembly of the track support platform for maintenance and replacement.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a prefabricated ballastless track with a detachable and assembleable rail support platform, including a rail support platform, a track slab, and a base. The rail support platform includes multiple prefabricated rail support platform units, each of which is fixed to the track slab by anchor bolts. The height of each rail support platform unit is selected as needed.

[0007] The rail support platform is either a rail support platform with a shoulder or a rail support platform without a shoulder. The lower part of the rail support platform is a rectangular block with anchor bolts at the four corners.

[0008] The pre-embedded sleeves on the track slab correspond to the positions of the anchor bolts on the rectangular block, and are used to connect the track support platform and the track slab.

[0009] The base is a cast-in-place reinforced self-compacting concrete structure.

[0010] The track slab is a bidirectional prestressed reinforced concrete structure. Prestressed threaded steel bars and steel strands are arranged inside along the longitudinal and transverse directions of the track. A grouting hole is set at the center of the transverse direction at the top of the track slab, along the longitudinal direction of the track, for pouring self-compacting concrete. Portal steel bars are set at the bottom of the track slab for connection with the base.

[0011] Heat shrink sleeves or small insulating clips are installed at the joints of longitudinal and transverse reinforcing bars and portal reinforcement bars to achieve track circuit insulation.

[0012] The beneficial effects of this utility model are: simple structure, the track structure is a double-layer structure system with only two layers: prefabricated track slabs and base, resulting in low structural height, minimal construction work, and cost savings. It features a prefabricated track support platform system with different specifications for standard, height adjustment, track alignment adjustment, and special adjustments, meeting the needs for different elevations and track alignments. The prefabricated track support platform and the prefabricated track slab are connected by anchor bolts, ensuring rapid disassembly and replacement during operation, saving maintenance time and reducing maintenance costs. Both the prefabricated track support platform and track slab are prefabricated in the factory, ensuring high production quality. Only the base is a cast-in-place structure, reducing the amount of concrete used for on-site pouring, lowering on-site construction difficulty, reducing construction errors, significantly improving construction quality control, and ensuring the overall reliability and structural safety of the track structure. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of the shouldered rail support of the assembled ballastless track with a detachable and assembleable rail support platform according to this utility model.

[0014] Figure 2 This is a cross-sectional structural diagram of the prefabricated ballastless track without shoulder support, which has a detachable and assembleable support platform according to this utility model.

[0015] Figure 3 yes Figure 1 Top view;

[0016] Figure 4 yes Figure 2 Top view;

[0017] Figure 5 yes Figure 1 A three-dimensional image;

[0018] Figure 6 yes Figure 2 A three-dimensional image. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 As shown in Figure 6, the prefabricated ballastless track of this utility model with a detachable and assembleable rail support platform includes a rail support platform, a track slab 2, and a base 3. The rail support platform includes multiple prefabricated rail support platform units 1. Each rail support platform unit 1 is fixed to the track slab 2 by anchor bolts 12. The height of each rail support platform unit 1 is selected as needed.

[0023] The rail support platform 1 is either a rail support platform 11 with a shoulder or a rail support platform 21 without a shoulder. The lower part of the rail support platform is a rectangular block, and the four corners of the rectangular block are equipped with anchor bolts 12.

[0024] The pre-embedded sleeves on the track slab 2 and the anchor bolts 12 on the rectangular block are positioned to connect the track support platform and the track slab 2.

[0025] The base 3 is a cast-in-place reinforced self-compacting concrete structure.

[0026] The track slab 2 is a bidirectional prestressed reinforced concrete structure. Prestressed threaded steel bars and steel strands are arranged inside along the longitudinal and transverse directions of the track. A grouting hole 13 is arranged at the transverse center of the top of the track slab 2 along the longitudinal direction of the track for pouring self-compacting concrete. A portal steel bar 14 is arranged at the bottom of the track slab 2 for connecting with the base 3.

[0027] Heat shrink sleeves or small insulating clips are installed at the joints of longitudinal and transverse reinforcing bars and portal reinforcement bars to achieve track circuit insulation.

[0028] The top of the track plate 2 has a pre-set rectangular groove corresponding to the position of the rail support platform, which matches the rectangular boss protruding downwards of the rail support platform system 1 to realize the longitudinal and lateral positioning of the rail support platform and ensure the longitudinal and lateral stability of the track structure.

[0029] Specifically, the prefabricated ballastless track with detachable and assembleable rail support platform consists of a prefabricated rail support platform unit 1, a track slab 2, and a base 3, forming a double-layer structure system. The prefabricated rail support platform unit 1 comprises rail supports 11 and 21 and anchor bolts 12. Rail supports 11 and 21 are prefabricated structures, with the upper part being either a rail support platform 11 with a shoulder or a rail support platform 21 without a shoulder. Anchor bolts 12 are attached to the rectangular blocks, and the rail support platform unit 1 is equipped with four anchor bolts to connect the prefabricated rail support platform unit 1 to the track slab 2. The track slab 2 is a bidirectional prestressed reinforced concrete structure. Prestressed threaded steel bars and steel strands are arranged longitudinally and transversely along the track inside the track slab 2. Portal-shaped steel bars are installed at the bottom of the track slab 2. Heat-shrink sleeves or small insulating clips are installed at the intersections of the longitudinal and transverse steel bars and the portal-shaped steel bars. A rectangular groove is pre-set at the top of the track slab 2 corresponding to the position of the rail support platform, and embedded sleeves are installed at the positions corresponding to the anchor bolts. Three grouting holes 13 are set at the transverse center of the top of the track slab 2 along the longitudinal direction of the track for pouring self-compacting concrete base 3. The base 3 is a cast-in-place reinforced concrete structure, formed by pouring self-compacting concrete. This utility model achieves track structure adjustment through prefabricated rail support platform units 1. Prefabricated rail support platform units 1 are available in different specifications, including standard, height-adjustable, track-direction-adjustable, and special shapes, to achieve vertical and transverse adjustments of the track structure. Different specifications of prefabricated rail support platforms can be disassembled and assembled on-site according to specific needs to meet the fine-tuning requirements of the track structure. The rail support platform can be made of concrete, steel, glass fiber reinforced polyamide, or other organic composite materials. The prefabricated rail support platform and track slab are connected by anchor bolts to achieve longitudinal and lateral limiting of the prefabricated rail support platform system, ensuring track structure stability and maintaining train operation safety. The bottom of the track slab 2 has pre-installed portal-shaped steel bars, which are poured into a self-compacting concrete base 3 to ensure track structure stability. The base 3 is a cast-in-place self-compacting concrete structure, which can compensate for errors in the lower foundation construction, ensure the track structure's adjustability during construction, and is also used to achieve superelevation settings on curved sections. This utility model features a prefabricated prefabricated rail support platform unit 1 and track slab 2, with a safe structure and controllable precision. The self-compacting concrete base 3 is poured on-site, which can compensate for errors in the lower foundation construction during the construction period, ensuring the track structure's construction precision. The prefabricated rail support platform unit 1 is available in different specifications, including standard, height-adjustable, track-direction-adjustable, and special-shaped products. During operation, the vertical and lateral deviations of the track structure can be adjusted by disassembling and replacing the rail support platform system, ensuring track structure smoothness.

[0030] In one embodiment, the prefabricated rail support system 1 can be a concrete structure, steel structure, glass fiber reinforced polyamide, or other organic composite materials. The track slab 2 is a prefabricated bidirectional prestressed reinforced concrete structure; preferably, the concrete grade used for the track slab 2 is C60. The base 3 is a cast-in-place reinforced concrete structure; preferably, the concrete grade used for the base 3 is C40. Furthermore, the above-mentioned track structure is simple in composition, a two-layer structural system, which facilitates production, construction, and subsequent replacement and maintenance, with a small workload. The prefabricated rail support unit 1 and the track slab 2 are both prefabricated structures, only the base 3 is a cast-in-place structure, ensuring construction quality control and guaranteeing the quality and safety of the track structure. In this scheme, the prefabricated rail support unit 1 has different specifications such as standard, height-adjustable, track-direction-adjustable, and special shapes to achieve vertical and lateral adjustments to the track structure. Different specifications of prefabricated rail support units can be disassembled and assembled on-site according to specific needs to meet the fine-tuning requirements of the track structure.

[0031] The rail structure is installed on the prefabricated rail support platform system using fasteners. The installation structure of the fasteners and rails is conventional technology in this field and will not be described in detail here.

[0032] This utility model features a simple structure with a double-layer track structure consisting of only prefabricated track slabs and a base. This design results in low structural height, minimal construction work, and cost savings. It offers prefabricated rail support platforms in various specifications, including standard, height-adjustable, alignment-adjustable, and special adjustment options, meeting the track structure's requirements for different elevations and alignments. The prefabricated rail support platforms are connected to the prefabricated track slabs via anchor bolts, ensuring rapid disassembly and replacement during operation, saving maintenance time and reducing maintenance costs. Both the prefabricated rail support platforms and track slabs are prefabricated in the factory, guaranteeing high production quality. Only the base is a cast-in-place structure, reducing on-site concrete usage, simplifying on-site construction, minimizing construction errors, and significantly improving construction quality control. This ensures the overall reliability and structural safety of the track structure. It can be widely applied to high-speed railway ballastless track systems.

[0033] In summary, the content of this utility model is not limited to the above-described embodiments. Those skilled in the art can easily propose other embodiments within the technical guiding principles of this utility model, but such embodiments are all included within the scope of this utility model.

Claims

1. A prefabricated ballastless track with a detachable and assembleable rail support platform, comprising a rail support platform, a track slab (2), and a base (3), characterized in that, The track support platform includes multiple prefabricated track support platform units (1), each track support platform unit (1) is fixed to the track slab (2) by anchor bolts (12), and the height of each track support platform unit (1) is selected as needed.

2. The prefabricated ballastless track with a detachable and assembleable rail support platform according to claim 1, characterized in that, The rail support platform unit (1) is a rail support platform (11) with a shoulder or a rail support platform (21) without a shoulder. The lower part of the rail support platform is a rectangular block with anchor bolts (12) at the four corners.

3. The prefabricated ballastless track with a detachable and assembleable rail support platform according to claim 2, characterized in that, The pre-embedded sleeve on the track slab (2) and the anchor bolt (12) on the rectangular block are positioned to connect the track support platform and the track slab (2).

4. The prefabricated ballastless track with a detachable and assembleable rail support platform according to claim 1, characterized in that, The base (3) is a cast-in-place reinforced self-compacting concrete structure.

5. The prefabricated ballastless track with a detachable and assembleable rail support platform according to claim 4, characterized in that, The track slab (2) is a two-way prestressed reinforced concrete structure. Prestressed threaded steel bars and steel strands are set inside along the longitudinal and transverse directions of the track. A grouting hole (13) is set at the middle of the transverse direction at the top of the track slab (2) along the longitudinal direction of the track for pouring self-compacting concrete. A portal steel bar (14) is set at the bottom of the track slab (2) for connecting with the base (3).

6. The prefabricated ballastless track with a detachable and assembleable rail support platform according to claim 4, characterized in that, Heat shrink sleeves or small insulating clips are installed at the joints of longitudinal and transverse reinforcing bars and portal reinforcement bars to achieve track circuit insulation.

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