A slab construction method for high-speed railway double-block type ballastless track bed

Abstract

This invention relates to the field of high-speed railway track slab construction technology, specifically a slab construction method for a double-block ballastless track bed in high-speed railways. The method involves using hoisting operations to stack steel mesh, sleepers, and track panels sequentially to form a slab structure. From bottom to top, the slab structure consists of steel mesh, sleepers pressed onto the upper end of the steel mesh, and modular track panels installed on the sleepers. The advantages are: by laying modular track panels, precast steel mesh, and sleepers separately, the traditional double-block ballastless track slab construction is transformed into Type III slab structure ballastless track slab construction; a mobile work trolley integrates steel reinforcement construction, double-block sleeper construction, and track panel construction; and the on-site operation of the double-block ballastless track slab is transformed into the overall hoisting operation of the Type III slab structure ballastless track. Simultaneously, a matching fine-tuning process is used to complete the fine-tuning operation of the slab ballastless track bed, thus realizing the slab construction method for double-block ballastless track beds.

Description

Technical Field

[0001] This invention relates to the field of high-speed railway track slab construction technology, specifically a slab construction method for a double-block ballastless track bed for high-speed railways. Background Technology

[0002] Railway construction includes two parts: base plate construction and track slab construction. The common track slab construction process is steel bar binding, sleeper laying, track panel installation, formwork installation, and concrete pouring. Only through this continuous construction can the overall track slab construction be completed.

[0003] However, the existing construction methods have interdependent processes, resulting in strict procedures. While this ensures the accuracy of construction, the procedures are cumbersome, and a lot of time is wasted in the connection and waiting between procedures, which seriously affects the construction efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a slab construction method for a double-block ballastless track bed for high-speed railways, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A slab construction method for a double-block ballastless track bed in high-speed railways, the slab construction method comprising the following steps:

[0007] Step 1: Install a movable mobile work trolley along the extension direction of the completed base plate, and transport and assemble the prefabricated steel mesh, sleepers and modular rail frame during the construction of the track bed slab using the mobile work trolley.

[0008] Step 2: Using hoisting operations, the steel mesh, sleepers, and rail panels are stacked sequentially to form a plate structure. The plate structure, from bottom to top, consists of steel mesh, sleepers pressed onto the upper part of the steel mesh, and modular rail panels installed on the sleepers.

[0009] Step 3: Hoist the entire panel structure onto the upper part of the base plate, and use the adjustment device to achieve precise adjustment of the installation position;

[0010] Step 4: After adjustment, install the pouring formwork and carry out concrete pouring and curing.

[0011] Preferably, one side of the mobile work trolley is provided with a storage platform for storing and placing steel mesh and sleepers, the other side of the mobile work trolley is provided with a work platform for assembling and stacking steel mesh, sleepers and modular rail panels, and the upper end of the mobile work trolley is provided with a special lifting tool for hoisting.

[0012] Preferably, the modular rail frame includes a main frame pressed onto the sleeper rail and four sets of support legs located on both sides of the base plate. The four sets of support legs are symmetrically distributed, and the upper end of the support leg is provided with an adjustment device for longitudinal and lateral adjustment between it and the main frame, and the lower end of the support leg is provided with a clamping device between it and the side wall of the base plate.

[0013] Preferably, a sleeper-splitting platform is provided on one side of the storage platform, and a sleeper-splitting device is provided on the upper end of the mobile work trolley, which is located directly above the sleeper-splitting platform. The sleeper-splitting device is used for automatic laying of sleepers.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention transforms the construction of traditional double-block ballastless track slabs into the construction of Type III slab-type ballastless track slabs by using modular track panels, precast steel mesh, and separate sleeper laying. It integrates steel reinforcement construction, double-block sleeper construction, and track panel construction using a mobile work trolley, transforming the on-site operation of double-block ballastless track slabs into the overall hoisting operation of Type III slab-type ballastless track. Simultaneously, it incorporates a matching fine-tuning process to complete the fine-tuning of the slab-type ballastless track, thus realizing a method for constructing double-block ballastless track slabs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the mobile work trolley structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the plate structure of the present invention mounted on the base plate;

[0018] Figure 3 This is a side view of the plate structure installation of the present invention;

[0019] Figure 4 This is a top view of the plate structure installation of the present invention.

[0020] In the diagram: 1. Mobile work trolley; 2. Sleeper splitting device; 3. Sleeper splitting platform; 4. Storage platform; 5. Work platform; 6. Special lifting tool; 7. Main frame; 8. Outriggers; 9. Clamping device; 10. Adjustment device; 11. Sleeper rail; 12. Steel mesh. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1 to 4The present invention provides a technical solution:

[0023] A slab construction method for a double-block ballastless track bed in high-speed railways, comprising the following steps:

[0024] Step 1: Install the movable mobile work trolley 1 along the extension direction of the completed base plate. The mobile work trolley 1 is used to transport and assemble the prefabricated steel mesh 12, sleeper rails 11 and modular rail frame during the construction of the track bed slab. A storage platform 4 for storing and placing the steel mesh 12 and sleeper rails 11 is set on one side of the mobile work trolley 1. A work platform 5 for assembling and stacking the steel mesh 12, sleeper rails 11 and modular rail frame is set on the other side of the mobile work trolley 1. A special lifting tool 6 for hoisting is set on the upper end of the mobile work trolley 1.

[0025] Step 2: Using hoisting operations, the steel mesh 12, sleeper rail 11, and rail panel are stacked sequentially to form a type III plate structure. A sleeper-splitting platform 3 is set on one side of the storage platform 4. A sleeper-splitting device 2 is set on the upper end of the mobile work trolley 1, located directly above the sleeper-splitting platform 3. The sleeper-splitting device 2 is used for automatic laying of sleeper rail 11. The plate structure consists of steel mesh 12, sleeper rail 11 pressed onto the upper end of steel mesh 12, and modular rail panel installed on sleeper rail 11 from bottom to top. The modular rail panel includes a main frame 7 pressed onto sleeper rail 11 and four sets of support legs 8 located on both sides of the base plate. The four sets of support legs 8 are symmetrically distributed, and an adjustment device 10 for longitudinal and lateral adjustment is set between the upper end of the support leg 8 and the main frame 7. A clamping device 9 is set between the lower end of the support leg 8 and the side wall of the base plate.

[0026] Step 3: Hoist the entire panel structure onto the upper part of the base plate, and use the adjustment device 10 to precisely adjust the installation position;

[0027] Step 4: After adjustment, install the pouring formwork and carry out concrete pouring and curing.

[0028] Working principle: During the construction of the track bed slab, the modular rail frame is first prefabricated and assembled. During continuous construction, two sets of modular rail frames are prepared, and the prefabricated steel mesh 12 and sleeper rail 11 are stored in the storage platform 4.

[0029] During construction, the steel mesh 12 is hoisted to the sleeper distribution platform 3 using a special hoisting tool 6. Then, the sleeper distribution device 2 automatically lays the sleeper rails 11 on the steel mesh 12 at intervals. The whole structure is then hoisted to the working platform 5. One set of modular rail panels is hoisted to the working platform 5 using a special hoisting tool 6 and pressed onto the sleeper rails 11 to form an upper and lower plate structure. The whole structure is then hoisted to the upper part of the base plate to be constructed. After hoisting, the clamping device 9 is used to limit and fix the modular rail panels. The adjustment device 10 is used to adjust the position of the main frame 7 relative to the sleeper rails 11 to complete the fine adjustment of the slab track bed. After the adjustment is completed, the pouring formwork is installed, and the concrete is poured and cured.

[0030] Then the mobile work platform 1 moves to the next continuous work surface. During the movement, another set of modular rail frame is retrieved to realize the reassembly and stacking of the above-mentioned plate structure, and the installation of the pouring template and the pouring and curing of concrete are carried out.

[0031] As the work area is further advanced, the concrete curing of the initial work area has been completed. Therefore, the modular rail frame corresponding to this work area can be disassembled. The disassembled modular rail frame is hoisted using a special lifting tool 6 and then reassembled and stacked with the mobile work trolley 1.

[0032] This continuous operation enables the continuous advancement of the track bed slab working surface and the slab construction.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A slab construction method for a double-block ballastless track bed for high-speed railways, characterized in that: The slab construction method includes the following steps: Step 1: Install a movable mobile work trolley (1) along the extension direction of the completed base plate. Use the mobile work trolley (1) to transport and assemble the prefabricated steel mesh (12), sleepers (11), and modular rail frames used in the construction of the track bed slab. One side of the mobile work trolley (1) is equipped with a storage platform (4) for storing and placing the steel mesh (12) and sleepers (11), and the other side of the mobile work trolley (1) is equipped with a work platform (5) for assembling and stacking the steel mesh (12), sleepers (11), and modular rail frames. The upper end of the mobile work trolley (1) is equipped with a special lifting tool for hoisting. 6) The modular rail frame includes a main frame (7) pressed onto the sleeper rail (11) and four sets of support legs (8) located on both sides of the base plate. The four sets of support legs (8) are symmetrically distributed, and an adjustment device (10) for longitudinal and lateral adjustment is provided between the upper end of the support leg (8) and the main frame (7). A clamping device (9) is provided between the lower end of the support leg (8) and the side wall of the base plate. A sleeper-splitting platform (3) is provided on one side of the storage platform (4). A sleeper-splitting device (2) is provided at the upper end of the mobile work trolley (1) located directly above the sleeper-splitting platform (3). The sleeper-splitting device (2) is used for the automatic laying of the sleeper rail (11). Step 2: Using hoisting operations, the steel mesh (12), sleeper rail (11) and rail frame are stacked in sequence to form a plate structure. The plate structure consists of the steel mesh (12), the sleeper rail (11) pressed onto the upper end of the steel mesh (12), and the modular rail frame installed on the sleeper rail (11) from bottom to top. Step 3: Hoist the entire plate structure to the upper part of the base plate, and use the adjustment device (10) to achieve precise adjustment of the installation position; Step 4: After adjustment, install the pouring formwork and carry out concrete pouring and curing.

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