Novel slab-type track bed structure having mortise and tenon-type connections

Abstract

A novel slab-type track bed structure having mortise and tenon-type connections, said structure comprising a left side slab (1), a middle slab (2) and a right side slab (3) which are modular, wherein mortise and tenon connections are used between the middle slab (2) and the left side slab (1), and between the middle slab (2) and the right side slab (3). The structure further comprises shear hinges (4), wherein the number of the shear hinges (4) matches the number of mortise and tenon connections, and two ends of each shear hinge (4) are respectively connected to outer sides of mortise and tenon connection points. The structure is simple to disassemble and assemble, easy to maintain and repair, and can prolong the service life of the assembled slab-type ballastless track structure.

Description

A novel mortise and tenon joint plate track structure Technical Field

[0001] This utility model relates to the field of construction engineering technology, specifically a novel slab track bed structure with mortise and tenon joints. Background Technology

[0002] Prefabricated slab track structures, due to their use of precast track slabs for the ballast layer, offer advantages such as good stability, high durability, long service life, and convenient maintenance, leading to their widespread application in high-speed railways and urban rail transit. Currently, in the high-speed railway sector, quality defects in slab track structures are gradually emerging, such as damage caused by track slab material defects, improper construction, excessive train loads, and environmental corrosion. To address these defects, current methods mostly employ rail replacement techniques, which suffer from drawbacks such as long construction periods, high labor intensity, and significant impact on existing lines. Although track slab defects have not yet manifested in the urban rail transit sector, research on corresponding maintenance and remediation technologies for slab track structures is limited. Therefore, researching a rapid replacement technology as a forward-looking reserve technology for improving the service performance of slab track structures is urgently needed. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a new type of slab track bed structure with mortise and tenon joints. It adopts a quick replacement method, improves the durability of the slab track bed structure, ensures the stability and safety of the track bed structure, and extends the service life and performance of the track bed.

[0004] To achieve the above objectives, a novel slab track bed structure with mortise and tenon joints is designed, including a modular left side plate, a middle plate, and a right side plate, wherein the middle plate, the left side plate, and the right side plate are connected by mortise and tenon joints; it also includes shear hinges, the number of which matches the number of mortise and tenon joints, and the two ends of the shear hinges are respectively connected to the outside of the mortise and tenon joint points.

[0005] Preferably, the width of the middle plate in this invention is greater than the width of the left plate, and the width of the left plate is equal to the width of the right plate.

[0006] Preferably, the middle plate, left side plate, and right side plate of this utility model are connected by three mortise and tenon structures, with the interface being a groove and a protrusion shape that fit together, and the width of the outer side of the protrusion is greater than the width of the inner side.

[0007] Preferably, the shear hinge of this utility model includes a connecting rod and connecting bolts located at both ends of the connecting rod. The connecting rod is located above the tenon and mortise connection point, and the connecting bolts are used to connect the outside of the tenon and mortise connection point.

[0008] Preferably, the tenon and mortise joint of this invention is filled with polyurethane foam.

[0009] Compared with the prior art, the advantages of this utility model are:

[0010] 1. Simple assembly and disassembly, easy maintenance and repair. The mortise and tenon joints allow for repeated disassembly and assembly, facilitating structural maintenance and replacement, and extending the service life of the prefabricated slab track structure.

[0011] 2. When performing replacement and repair, the operation process is quick and simple, which can effectively utilize the sunroof window time for construction and ensure that the operation of the vehicle will not be affected the next day after each sunroof window is completed.

[0012] 3. The use of mortise and tenon joints creates a stable connection, making the prefabricated track slab structure more robust and reliable, and ensuring the stability of the track structure.

[0013] 4. With the goal of restoring the original structural state of the precast track slab, the repair and replacement will not affect the original structure and will be safe and reliable. Attached Figure Description

[0014] Figure 1 is a structural diagram of the plate-type track bed of this utility model;

[0015] Figure 2 is a structural diagram of the assembled slab track of this utility model;

[0016] Figure 3 is a schematic diagram of the mortise and tenon structure of this utility model;

[0017] Figure 4 is a structural diagram of the shear hinge of this utility model;

[0018] Figure 5 is a flowchart of the construction process for quick replacement of the slab track bed of this utility model.

[0019] In the diagram: 1. Left side plate; 2. Middle plate; 3. Right side plate; 4. Shear hinge; 5. Rail; 6. Fastener; 7. Precast track slab; 8. Self-compacting concrete layer; 9. Geotextile delamination layer; 10. Precast base plate; 11. Segment. Detailed Implementation

[0020] To make the purpose, principle and structure of this utility model clearer, the following description is provided in conjunction with the accompanying drawings and specific embodiments.

[0021] Example 1: A novel slab track bed structure with mortise and tenon joints

[0022] Referring to Figures 1-4, in order to enable rapid maintenance and replacement of prefabricated track slabs in the assembled slab track structure, the structure of this utility model mainly consists of a left side plate 1, a middle plate 2, a right side plate 3, and a shear hinge 4.

[0023] The left side plate 1, the middle plate 2, and the right side plate 3 are made by cutting the original prefabricated track slab into three pieces. The width of the middle plate 2 is greater than that of the left side plate 1 and the right side plate 3. The widths of the left side plate 1 and the right side plate 3 are equal. The left side plate 1 is connected to the middle plate 2, and the middle plate 2 is connected to the right side plate 3 by three mortise and tenon structures. The interface is a groove and a convex groove shape of 160mm×80mm.

[0024] There are three shear hinges 4 in total, which are set at the tenon and mortise joints of the three precast track slabs to connect two adjacent precast track slabs. They are fixed to the precast track slabs at both ends by bolts to limit horizontal displacement and offset, and to ensure the stability and integrity of the track slab structure.

[0025] The specific usage method of this embodiment is as follows:

[0026] Referring to Figure 5, when the precast track slabs of the prefabricated slab track structure are damaged and need to be replaced or repaired, first disassemble the shear hinge 4, and then disassemble the left side slab 1 and the right side slab 3. Use a track flatbed truck to transport the old slabs out and the new slabs in, restoring the connection between the newly placed left and right side slabs and the precast track slab 7, self-compacting concrete layer 8, geotextile delamination layer 9, precast base slab 10, segments 11, and fasteners 6, etc., of the prefabricated slab track structure. After the replacement of the left side slab 1 and the right side slab 3 is completed, proceed with the... The replacement of the intermediate slab 2 involves disassembling and removing the old slab, then moving in the new slab, and restoring the connection between the newly placed intermediate slab 2 and the self-compacting concrete layer 8 and fasteners 6, as well as other prefabricated slab track structures. Simultaneously, polyurethane foam with good extensibility and plasticity is applied to the contact points of the two slabs connected by mortise and tenon joints to fill the gaps between the track slabs, improving the sealing and stability of the replaced prefabricated track slabs. Finally, the shear hinge 4 is installed back in its original position to ensure that each unit of the track bed slab can share the load and work collaboratively.

[0027] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and novel concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A novel slab track bed structure with mortise and tenon joints, characterized in that... include Modular left side panel, middle panel and right side panel, wherein the middle panel, left side panel and right side panel are connected by mortise and tenon joints; It also includes shear hinges, the number of which matches the number of mortise and tenon connections. The two ends of the shear hinge are respectively connected to the outside of the tenon and mortise joint.

2. The novel mortise and tenon joint plate track structure as described in claim 1, characterized in that... The width of the middle plate is greater than the width of the left plate, and the width of the left plate is equal to the width of the right plate.

3. The novel mortise and tenon joint plate track structure as described in claim 1, characterized in that... The middle plate, left plate, and right plate are connected by three mortise and tenon joints, with the interface consisting of a groove and a protrusion. The outer width of the protrusion is greater than the inner width.

4. The novel mortise and tenon joint plate track structure as described in claim 1, characterized in that... The shear hinge includes a connecting rod and connecting bolts located at both ends of the connecting rod. The connecting rod is located above the mortise and tenon joint, and the connecting bolts are used to connect the outside of the mortise and tenon joint.

5. The novel mortise and tenon joint plate track structure as described in claim 1, characterized in that... The mortise and tenon joint is filled with polyurethane foam.

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