Fishbone-shaped track bed structure and construction method thereof for updating existing ballastless track bed

Abstract

The present application relates to a kind of fishbone-shaped track bed structure and its construction method for existing ballastless track bed renewal.The existing track bed structure renewal method is difficult, inefficient and costly.The fishbone-shaped track bed structure includes rail bearing plate and connecting hinge;The outer side of rail bearing plate has rail bearing framework, and the top surface of rail bearing framework is provided with rail bearing platform;Rail bearing plate is provided with two, and connecting hinge is located between two rail bearing plates and connects two rail bearing plates into one, two rail bearing plates form a plate body when unfolded, and two rail bearing plates are stacked when folded.The present application connects two rail bearing plates together by connecting hinge, two rail bearing plates form a plate body when unfolded, and two rail bearing plates are stacked when folded, which can replace ballastless track bed without removing steel rail, greatly improve the workload and difficulty of existing ballastless track bed renewal and maintenance, reduce project investment and reduce the interference of track bed renewal on operation.

Description

Technical Field

[0001] This invention relates to the field of track engineering technology, specifically to a fishbone-shaped track bed structure and its construction method for updating existing ballastless track beds. Background Technology

[0002] Ballastless track is a track structure that uses a monolithic foundation to replace the loose ballast track bed. It offers better smoothness, requires less maintenance, and avoids the splashing of ballast, significantly improving the speed of rail transit. However, as a rigid structure, ballastless track can only be improved in a limited way during the later operational phase. Therefore, structural updates to the ballastless track bed can only be carried out within the design life of the underlying foundation structure.

[0003] Currently, the existing methods for upgrading and renovating ballastless tracks are quite complex. They require the removal of the existing structure, the re-casting of quick-setting concrete, and the construction of a new track bed structure. This is extremely difficult, inefficient, and costly, and the construction period is long. It also requires track closures for construction, which has a long-term impact on operations.

[0004] Therefore, it is necessary to propose new modification measures for the renovation of existing ballastless tracks to overcome the shortcomings of existing methods. Summary of the Invention

[0005] The purpose of this invention is to provide a fishbone-shaped track bed structure and its construction method for the renewal of existing ballastless track beds, so as to solve the problems of high difficulty, low efficiency and high cost of existing renewal methods.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A herringbone-shaped track bed structure, the herringbone-shaped track bed structure including a track support plate and a connecting hinge;

[0008] The outer side of the rail support plate has a rail support frame, and the top surface of the rail support frame is provided with a rail support platform.

[0009] The rail plate is provided in two parts, and the connecting hinge is located between the two rail plates and connects the two rail plates into one piece. When unfolded, the two rail plates form a plate body, and when folded, the two rail plates are stacked on top of each other.

[0010] Furthermore, the rail support frame includes several strip-shaped rib plates, which are arranged longitudinally at equal intervals in the transverse direction;

[0011] The rail support frame and the rail support plate are prefabricated structures formed as a single unit.

[0012] Furthermore, the connecting hinge includes a hinge plate and a rotating shaft;

[0013] The hinge plate is L-shaped and is disposed on the inner end face and bottom face of the bearing plate. A longitudinal shaft tube is disposed on the bottom edge of the hinge plate.

[0014] The hinge plates of the two rail bearing plates are longitudinally staggered front and rear, and coaxially connected in the longitudinal direction. The rotating shaft is inserted into all the shaft tubes to hinge the two rail bearing plates together.

[0015] Furthermore, the hinge plate is provided with anchor bolts, which are pre-embedded in the rail bearing plate.

[0016] Furthermore, a connecting hole plate is provided on the top of the hinge piece, and the connecting hole plate is fixedly connected to the hinge piece and located on the inner top surface of the support plate;

[0017] The connecting hole plate is provided with a transverse connecting hole, and the connecting hole plates of the hinge pieces of the two bearing plates are connected to each other. The two connecting holes are transversely connected and connected to each other by inserting bolts.

[0018] Furthermore, the herringbone-shaped track bed structure also includes an adjustment layer, which is located below the track support plate and between longitudinally adjacent rib plates.

[0019] Furthermore, the outer side of the rib plate is provided with transverse fine-tuning bolt holes.

[0020] On the other hand, a construction method is provided for the renovation of existing ballastless track using a herringbone-shaped track bed structure, the method being implemented based on the herringbone-shaped track bed structure, including:

[0021] During the track maintenance window, the existing ballastless track bed structure will be gradually removed, leaving only the original rail support platform to support the rails, ensuring train passage during non-track maintenance window periods.

[0022] During the next track window, the herringbone-shaped track bed structure will be transported to the site and placed between the two rails. After ensuring that the rail support platform is aligned with the existing ballastless track bed structure that has been removed, the rail support plate will be gradually unfolded using the traveling wheel device.

[0023] After fully unfolding, bolts are passed through the connecting holes of the hinge plate and locked to the support plate, so that the two support plates are connected as one.

[0024] The rail plate is finely adjusted by adjusting the bolt holes;

[0025] After fine-tuning, the adjustment layer material is poured into the underside of the plate through the gap between adjacent rib plates, forming an adjustment layer located below the rail plate and between longitudinally adjacent rib plates. After solidification, it completes the support for the rail plate.

[0026] Furthermore, the method also includes:

[0027] After the adjustment layer is consolidated, the support for the rail bearing plate is completed. The fasteners on the original rail bearing platform are removed and reinstalled on the rail bearing platform of the rail bearing plate, thus completing the transition of the rail force transmission system from the existing ballastless track bed structure to the updated herringbone track bed structure.

[0028] Furthermore, the method also includes:

[0029] When retaining the original rail support platform to support the rails, a temporary support structure is used to jointly support the rails.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] This invention provides a herringbone-shaped track bed structure and its construction method for upgrading existing ballastless track beds. Two rail bearing plates are connected together using a connecting hinge. When unfolded, the two rail bearing plates form a single plate; when folded, they are stacked vertically. During storage and transportation, the connecting hinge is in the open state. After arriving at the construction site, the track is placed under the rails between the two rails, and the connecting hinge is gradually closed during placement. Once fully closed, bolts are used to lock it through the connecting holes, ensuring the top surfaces of the left and right rail bearing plates are on the same plane. Then, the fasteners on the original rail bearing platform are removed and reinstalled onto the rail bearing platform on the new rail bearing plate, completing the transition of the rail force transmission system from the existing ballastless track bed to the upgraded track bed. This invention allows for the replacement of ballastless track beds without removing the rails, significantly reducing the workload and difficulty of upgrading and maintaining existing ballastless track beds, reducing project investment, and minimizing operational disruption caused by track bed upgrades. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a plan view of the rail support plate after assembly.

[0034] Figure 2 This is an elevation view of the rail support plate after it has been assembled and folded.

[0035] Figure 3 This is a diagram showing the placement of the rail bearing plates before installation at the construction site.

[0036] Figure 4 This is a schematic diagram showing the unfolding process of the rail bearing plate during construction.

[0037] Figure 5 This is a plan view of the installation and placement of the rail bearing slab.

[0038] Figure 6This is an elevation view of the track support plate being installed.

[0039] The diagram is labeled as follows:

[0040] 1-Rail support plate, 2-Connecting hinge, 3-Adjustment layer, 4-Rail, 5-Original rail support platform;

[0041] 11-Rail support platform, 12-Fine adjustment bolt hole, 13-Rail support frame;

[0042] 21-Hinge, 22-Bolt, 23-Anchor, 24-Connecting hole, 25-Rotating shaft. Detailed Implementation

[0043] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0044] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In a specific implementation, the direction of the line is defined as longitudinal, the direction perpendicular to the direction of the line is defined as transverse, the direction closer to the centerline of the line is defined as the inner side, and the direction farther from the centerline of the line is defined as the outer side.

[0047] This invention provides a fishbone-shaped track bed structure, designed as a prefabricated folding body, which can be used for the operation and maintenance of existing ballastless track beds. It has a short construction time and can significantly improve the efficiency of the maintenance and installation accuracy.

[0048] like Figure 1 and Figure 2The main structure of the herringbone-shaped track bed includes a rail support plate 1 and a connecting hinge 2. The outer side of the rail support plate 1 has a rail support frame 13, and the top surface of the rail support frame 13 is provided with a rail support platform 11. Two rail support plates 1 are provided, used in pairs. The connecting hinge 2 is located between the two rail support plates 1 and connects them into one unit. When unfolded, the two rail support plates 1 form a single plate; when folded, the two rail support plates 1 are stacked vertically. During storage and transportation, the connecting hinge 2 is in the open state, at which time the left and right rail support plates 1 are pressed together, and their top surfaces are parallel to each other. After arriving at the construction site, the track bed is placed under the rails between the two steel rails 4, and the connecting hinge 2 is gradually closed during placement. After being fully closed, it is locked, at which point the top surfaces of the left and right rail support plates 1 are on the same plane.

[0049] When unfolded, the rail support frame 13 is symmetrically located on the left and right sides of the rail support plate 1. The rail support frame 13 includes several strip-shaped rib plates, which are arranged longitudinally at equal intervals in the transverse direction. The longitudinally adjacent rib plates are hollowed out, and the whole structure presents a fishbone shape. The rail support frame 13 and the rail support plate 1 are prefabricated structures integrally formed, and the rail support platform 11 is located on the top surface of the rib plates.

[0050] like Figure 4 The connecting hinges 2 are longitudinally spaced between the bearing plates 1 and are cast integrally with the bearing plates 1 in the factory. The connecting hinges 2 include hinge plates 21 and rotating shafts 25. The hinge plates 21 are L-shaped and are located on the inner end face and bottom surface of the bearing plates 1. A longitudinal shaft tube is provided on the bottom edge of the hinge plate 21. The shaft tubes of the hinge plates 21 of the two bearing plates 1 are longitudinally staggered front and rear and coaxially connected. The rotating shaft 25 is inserted into all the shaft tubes, hinged to connect the two bearing plates 1 into one unit. Anchor nails 23 are provided on the hinge plates 21 and are pre-embedded in the bearing plates 1. The connecting hinges 2 are equipped with a locking device. A connecting hole plate is provided on the top of the hinge plates 21. The connecting hole plate is fixedly connected to the hinge plates 21 and located on the inner top surface of the bearing plates 1. A transverse connecting hole 24 is provided on the connecting hole plate. The connecting hole plates of the hinge plates 21 of the two bearing plates 1 are abutted together, and the two connecting holes 24 are transversely connected and connected to each other by insert bolts 22.

[0051] The herringbone-shaped track bed structure also includes an adjustment layer 3, which is located below the track support plate 1 and between longitudinally adjacent rib plates. It is formed by pouring adjustment layer material between two adjacent front and rear rib plates and consolidating it.

[0052] The outer side of the rib plate is also provided with transverse fine adjustment bolt holes 12 for transverse adjustment of the bearing plate 1. Fine adjustment catches are installed in the fine adjustment bolt holes 12 to support the left and right bearing plates 1 respectively.

[0053] In addition, the present invention provides a construction method for the above-mentioned herringbone-shaped track bed structure to be used for the renovation of existing ballastless track beds, specifically including the following steps:

[0054] S1: During the track maintenance window, the existing ballastless track bed structure will be gradually removed, leaving only the original track support platform 5 to support the rails 4, to ensure train passage during non-track maintenance window periods.

[0055] When the original rail support platform 5 is retained to support the rail 4, a temporary support structure may be used to jointly support the rail 4 if necessary.

[0056] S2: During the next track window, transport the herringbone-shaped track bed structure to the site and place it between the two steel rails 4, as follows. Figure 3 After ensuring that the rail support platform 11 is aligned with the existing ballastless track bed structure that has been removed, the rail support plate 1 is gradually unfolded using the traveling wheel device, such as... Figure 4 .

[0057] S3: After fully unfolding, bolt 22 is passed through the connecting hole 24 of hinge plate 21 and locked to the bearing plate 1, so that the two bearing plates 1 are connected as one unit, such as Figure 6 .

[0058] S4: Fine-tune the rail plate 1 through the fine-tuning bolt hole 12.

[0059] S5: After fine-tuning, pour the adjustment layer material under the plate through the gap between adjacent rib plates, such as... Figure 5 An adjustment layer 3 is formed below the rail plate 1 and between the longitudinally adjacent rib plates, which, after consolidation, completes the support for the rail plate.

[0060] The above methods also include:

[0061] After the adjustment layer 3 is consolidated, the support for the rail bearing plate 1 is completed. The fasteners on the original rail bearing platform 5 are removed and reinstalled on the rail bearing platform 11 of the rail bearing plate 1, completing the transition of the rail force transmission system from the existing ballastless track bed structure to the updated herringbone track bed structure. Finally, depending on the situation, the original rail bearing platform structure can be chiseled away and refilled with filling material, or it can be left unchanged.

[0062] If the existing ballastless track bed retains the existing track support platform, resin material should be filled in the gap between the precast slab and the track support platform 11. If the existing track support platform is removed, filling material should be filled in the gap of the existing track support platform.

[0063] This invention allows for the replacement of ballastless track without removing the rails, significantly reducing the workload and difficulty of updating and maintaining existing ballastless track, while lowering project investment and minimizing operational disruptions. Furthermore, the rail support frame 13 designed in this invention not only requires minimal construction materials and is lightweight, but also allows for ample construction space during the later pouring process, with adjustment layer material being poured under the slab through the gaps between adjacent rib plates.

[0064] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A fishbone-shaped track bed structure, characterized in that: The herringbone-shaped track bed structure includes a track support plate (1) and a connecting hinge (2). The outer side of the rail plate (1) has a rail frame (13), and the top surface of the rail frame (13) is provided with a rail platform (11). There are two rail plates (1). The connecting hinge (2) is located between the two rail plates (1) and connects the two rail plates (1) into one piece. When unfolded, the two rail plates (1) form a plate body. When folded, the two rail plates (1) are stacked on top of each other. The rail support frame (13) includes several strip-shaped rib plates, which are arranged longitudinally at equal intervals in the transverse direction; The rail support frame (13) and the rail support plate (1) are integrally formed prefabricated structures; The connecting hinge (2) includes a hinge plate (21) and a rotating shaft (25); The hinge piece (21) is L-shaped and is provided on the inner end face and bottom face of the bearing plate (1). A longitudinal shaft tube is provided on the bottom edge of the hinge piece (21). The shaft tubes of the hinge pieces (21) of the two rail plates (1) are longitudinally staggered front and back and longitudinally coaxial. The rotating shaft (25) is inserted into all the shaft tubes to hinge the two rail plates (1) into one piece. Anchor pins (23) are provided on the hinge plate (21), and the anchor pins (23) are pre-embedded in the rail bearing plate (1); The hinge plate (21) is provided with a connecting hole plate at its top. The connecting hole plate is fixedly connected to the hinge plate (21) and located on the inner top surface of the bearing plate (1). The connecting hole plate is provided with a transverse connecting hole (24). The connecting hole plates of the hinge pieces (21) of the two bearing plates (1) are connected to each other, and the two connecting holes (24) are transversely connected and connected to each other by inserting bolts (22).

2. The fishbone-shaped track bed structure according to claim 1, characterized in that: The fishbone-shaped track bed structure also includes an adjustment layer (3), which is located below the track support plate (1) and between longitudinally adjacent rib plates.

3. The fishbone-shaped track bed structure according to claim 2, characterized in that: The outer side of the rib plate is provided with transverse fine-tuning bolt holes (12).

4. A construction method for replacing existing ballastless track beds using a herringbone-shaped track bed structure, characterized by: The method is implemented based on the fishbone-shaped track bed structure described in claim 3, and includes: During the track maintenance window, the existing ballastless track bed structure is gradually removed, leaving only the original rail support platform (5) to support the rails (4), ensuring train passage during non-track maintenance window periods; The fishbone-shaped track bed structure was transported to the site during the next skylight and placed between the two steel rails (4). After ensuring that the rail support platform (11) was aligned with the existing ballastless track bed structure that had been removed, the rail support plate (1) was gradually unfolded through the traveling wheel device. After being fully extended, bolts (22) are passed through the connecting holes (24) of the hinge plate (21) and the bearing plate (1) is locked to connect the two bearing plates (1) into one piece; The rail plate (1) is finely adjusted by adjusting the bolt holes (12); After fine-tuning, the adjustment layer material is injected into the underside of the plate through the gap between the adjacent rib plates to form an adjustment layer (3) located below the rail plate (1) and between the longitudinally adjacent rib plates. After solidification, the support for the rail plate is completed.

5. The construction method for updating existing ballastless track beds using the fishbone-shaped track bed structure according to claim 4, characterized in that: The method further includes: After the adjustment layer (3) is solidified, the support for the rail bearing plate (1) is completed. The fasteners on the original rail bearing platform (5) are removed and reinstalled on the rail bearing platform (11) of the rail bearing plate (1), thus completing the transition of the rail force transmission system from the existing ballastless track bed structure to the updated herringbone track bed structure.

6. The construction method for using the herringbone-shaped track bed structure according to claim 5 for the renewal of existing ballastless track beds, characterized in that: The method further includes: When the original rail support platform (5) is retained to support the rail (4), a temporary support structure is used to jointly support the rail (4).

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