Large-diameter shield machine whole machine starting trailer towing tool for single-hole double-line tunnel

Abstract

This utility model provides a towing fixture for launching trailers in a single-tunnel, double-track, large-diameter shield tunneling machine. Installed between the sinking and lifting sections of the open-cut section, it is used to tow the trailer being hoisted from the launching shaft to the open-cut section. The fixture includes: a top plate, located at the top of the sinking section and extending to the lifting section; a mounting base plate, located at the bottom of the sinking section; and a first towing system, comprising: a first winch mounted on the mounting base plate; and a fourth fixed pulley located at the bottom of the top plate. The steel cable of the first winch passes through the fourth fixed pulley and is connected to the trailer inside the launching shaft. The horizontal tension generated by the steel cable in the first winch is transmitted to the trailer already hoisted into the launching shaft via the fourth fixed pulley. This not only enables horizontal movement of the trailer in the air but also effectively offsets a portion of the trailer's weight, significantly reducing the sliding friction between the trailer and the ground, lowering towing resistance, and allowing the trailer to smoothly and accurately enter the designated position.

Description

Technical Field

[0001] This utility model relates to the field of shield tunneling machine assembly technology, specifically to a launching trailer for a large-diameter shield tunneling machine in a single-tunnel double-track tunnel. Background Technology

[0002] In the construction of urban subways, railway tunnels, and other infrastructure, the shield tunneling method has become the mainstream construction method due to its advantages of safety, efficiency, and minimal ground disturbance. Among them, large-diameter shield tunneling machines are increasingly widely used because they can complete the excavation of a single-tube double-track tunnel in one go, significantly improving construction efficiency.

[0003] Traditional tunnel boring machine (TBM) launching processes require a sufficiently large launching shaft and an extended open-cut section to accommodate the TBM head and all supporting trailers within the main construction area of ​​the launching shaft, allowing for on-site assembly and commissioning. To accommodate large-diameter TBMs and their trailers, the required site length for launching typically exceeds 100 meters. However, constrained by dense existing buildings, busy road networks, and limited underground space, TBM launching sections are often designed as open-cut tunnels. This type of structure results in extremely limited space in the launching shaft and within the tunnel itself, far from meeting the site requirements of traditional TBM launching. Therefore, under conditions of limited launching shaft space and an open-cut launching section, ensuring the safe, efficient, and rapid entry of the supporting trailers into the tunnel structure and their assembly with the TBM head becomes a pressing technical challenge. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a launching trailer for a large-diameter shield tunneling machine in a single-tunnel double-track tunnel. This solves the problem of inefficient shield machine assembly under conditions where the launching shaft space is limited and the launching section is an open-cut and buried structure.

[0005] According to an embodiment of this utility model, a launching trailer for a large-diameter shield tunneling machine in a single-bore, double-track tunnel is installed between the sinking and lifting sections of the open-cut section. It is used to tow the trailer during hoisting from the launching shaft to the open-cut section, and includes: The top plate is located at the top of the sunken section and extends to the raised section; Install the base plate, which is located at the bottom of the sunken section; The first tractor system includes: The first winch is mounted on the mounting base plate; The fourth fixed pulley is located at the bottom of the top plate; The steel cable of the first winch passes through the fourth fixed pulley and is connected to the trailer inside the launching shaft.

[0006] Preferably, the towing fixture also includes a second towing system, which includes a middle plate located at the bottom of the top plate and corresponding to the lifting section. A second winch is also provided at one end of the middle plate near the lowering section, and the steel cable of the second winch is connected to the trailer in the lifting section.

[0007] Preferably, the second towing system further includes a connecting base plate, which is located on the upper section, and a second fixed pulley is provided at one end of the connecting base plate near the lower section.

[0008] Preferably, a fifth fixed pulley is provided at one end of the middle plate near the lower section, and the fifth fixed pulley corresponds to the second winch.

[0009] Preferably, the fifth fixed pulley is vertically aligned with the second fixed pulley.

[0010] Preferably, a connecting beam is provided at one end of the top plate near the sunken section, the connecting beam is provided with a crossbeam, and the crossbeam is provided with a first fixed pulley.

[0011] Preferably, the mounting base plate is equipped with a third fixed pulley, and the steel cable of the first winch is threaded between the third fixed pulley and the fourth fixed pulley.

[0012] Compared with the prior art, the present invention has the following beneficial effects: With the first towing system in place, the first winch utilizes the space at the bottom of the open-cut section, and the fourth fixed pulley utilizes the space at the top of the open-cut section, minimizing the occupation of limited construction space. The horizontal tension generated by the steel cable in the first winch is transmitted to the trailer that has been hoisted to the starting shaft via the fourth fixed pulley. This not only enables the trailer to move horizontally in the air, but also effectively offsets part of the trailer's own weight, thereby significantly reducing the sliding friction between the trailer and the ground, reducing towing resistance, and allowing the trailer to enter the designated position smoothly and accurately. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the starting well before it is towed by a trailer in an embodiment of this utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the starting well after it has been towed by a trailer in an embodiment of this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the upper section before it is towed by the trailer in an embodiment of this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of the upper section after being towed by a trailer in an embodiment of this utility model.

[0017] In the above attached diagrams: 1. Open-cut section; 2. Top plate; 3. Middle plate; 4. Installation base plate; 5. Connecting base plate; 6. Second winch; 7. First winch; 8. First fixed pulley; 9. Second fixed pulley; 10. Third fixed pulley; 11. Fourth fixed pulley; 12. Fifth fixed pulley; 13. Trailer; 14. Launch shaft; 15. Crossbeam; 16. Connecting beam; 17. Lowering section; 18. Lifting section. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] This utility model embodiment proposes a launching trailer for a large-diameter shield tunneling machine in a single-bore, double-track tunnel. Installed between the sinking section 17 and the lifting section 18 of the open-cut section 1, it is used to tow the trailer 13 during hoisting from the launching shaft 14 to the open-cut section 1. The trailer includes: Top plate 2 is located at the top of the sunken section 17 and extends to the raised section 18; Install base plate 4, which is located at the bottom of the sunken section 17; The first tractor system includes: The first winch 7 is mounted on the mounting base plate 4; The fourth fixed pulley 11 is located at the bottom of the top plate 2; The steel cable of the first winch 7 passes through the fourth fixed pulley 11 and is connected to the trailer 13 inside the launching shaft 14.

[0020] In this embodiment, as Figure 1 and Figure 2 As shown, conventional lifting machinery is installed on the ground, and the supporting trailer structure is generally five sections. Therefore, the trailer 13 entering from the launching shaft 14 is a No. 1 trailer structure. By connecting the lifting machinery's hoisting rope to the trailer 13 that needs to enter from the launching shaft 14, and by passing the steel cable of the first winch 7 through the fourth fixed pulley 11 and connecting it to the top of the trailer 13, the hoisting machinery's lower hoisting rope is controlled, allowing the trailer 13 to enter the launching shaft 14. During the lowering process, when the trailer 13 is lower than the height of the top plate 2, the first winch 7 is activated, causing the first winch 7 to wind up its supporting steel cable. The horizontal tension generated by the steel cable in the first winch 7 is transmitted to the trailer 13 that has been hoisted into the launching shaft 14 through the fourth fixed pulley 11. This not only enables the trailer 13 to move horizontally in the air, but also effectively offsets part of the trailer 13's own weight, thereby significantly reducing the sliding friction between the trailer 13 and the ground, reducing the dragging resistance, and allowing the trailer 13 to enter the designated position smoothly and accurately.

[0021] At the same time, such as Figure 3As shown, the mounting base plate 4 is equipped with a third fixed pulley 10. The steel cable of the first winch 7 is passed between the third fixed pulley 10 and the fourth fixed pulley 11. The third fixed pulley 10 can receive the horizontal tension of the first winch 7 and guide it upward toward the fourth fixed pulley 11 installed on the top plate 2, ensuring that the rope exit angle of the first winch 7 is optimal and the operation is smooth.

[0022] Moreover, when trailer #1 13 is suspended in the launching shaft 14 and begins to be pulled towards the open-cut section 1 by the first towing system, the hoisting rope of the lifting machinery will inevitably come into contact with and rub against the structure of the launching shaft 14. Therefore, a connecting beam 16 is provided at one end of the top plate 2 near the sinking section 17. The connecting beam 16 is provided with a crossbeam 15. The crossbeam 15 is provided with a first fixed pulley 8. The first fixed pulley 8 provides a smooth rolling support point for the hoisting rope of the lifting machinery, which can prevent it from being cut by the sharp concrete edge of the shaft opening under heavy load.

[0023] This solution not only allows the trailer 13 in the launching shaft 14 to be towed to the open-cut section 1, but also, after the trailer 13 entering from the launching shaft 14 is assembled, to facilitate the connection of the remaining trailer 13 sections, the remaining trailer 13 sections all enter the opening of the open-cut section 1, i.e., the lifting section 18. The remaining trailer 13 sections can also be towed through the opening to the open-cut section 1 using a second towing system. Figure 3 and Figure 4 As shown, the towing fixture also includes a second towing system, which includes a middle plate 3. The middle plate 3 is located at the bottom of the top plate 2 and corresponds to the lifting section 18. A second winch 6 is also provided at one end of the middle plate 3 near the sinking section 17. The steel cable of the second winch 6 is connected to the trailer 13 in the lifting section 18.

[0024] During the hoisting of trailer #13, the other trailers #13 can be towed simultaneously at the entrance of the open-cut section 1. By starting the second winch 6, the other trailers #2 to #5 are pulled from the entrance into the open-cut section 1 by the action of the steel cable of the second winch 6 to be assembled with the installed trailer #13.

[0025] In summary, the first towing system handles trailer #1 13 entering from the starting well 14, and the second towing system handles trailers #2 to #5 13 entering the lifting section 18 from the tunnel entrance. The first and second towing systems can operate independently or in coordination.

[0026] Specifically, such as Figure 1 and Figure 2As shown, the second towing system also includes a connecting base plate 5, which is located on the lifting section 18, and a second fixed pulley 9 is provided at one end of the connecting base plate 5 near the lowering section 17. When the first towing system and the second towing system work together, the steel cable in the first winch 7 of the first towing system can be connected to trailers 13 #2 to #5, and work together with the second winch 6 of the second towing system, which increases the traction force on trailers 13 #2 to #5 and improves towing efficiency.

[0027] Secondly, a fifth fixed pulley 12 is provided at one end of the middle plate 3 near the lower section 17. The fifth fixed pulley 12 corresponds to the second winch 6. Under the action of the fifth fixed pulley 12, the steel cable of the second winch 6 can be guided, and the sliding friction between it and the middle plate 3 can be reduced. This not only avoids wear, but also improves the transmission efficiency.

[0028] Furthermore, the fifth fixed pulley 12 is vertically aligned with the second fixed pulley 9, facilitating the placement of trailers 13 from #2 to #5 under the synchronous traction of the first winch 7 and the second winch 6.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A single-bore, double-track tunnel large-diameter shield tunneling machine launching trailer towing device, installed between the sinking section (17) and the lifting section (18) of the open-cut section (1), used to tow the trailer (13) during hoisting from the launching shaft (14) to the open-cut section (1), characterized in that, include: Top plate (2), the top plate (2) is located on the top of the sunken section (17) and extends to the raised section (18). Mounting base plate (4), which is located at the bottom of the sunken section (17); A first towing system, comprising: The first winch (7) is mounted on the mounting base plate (4); A fourth fixed pulley (11) is provided at the bottom of the top plate (2); The steel cable of the first winch (7) passes through the fourth fixed pulley (11) and is connected to the trailer (13) inside the launching shaft (14).

2. The launching trailer for a large-diameter shield tunneling machine in a single-bore, double-track tunnel as described in claim 1, characterized in that, The towing fixture also includes a second towing system, which includes a middle plate (3). The middle plate (3) is located at the bottom of the top plate (2) and corresponds to the lifting section (18). A second winch (6) is also provided at one end of the middle plate (3) near the sinking section (17). The steel cable of the second winch (6) is connected to the trailer (13) in the lifting section (18).

3. The launching trailer for a large-diameter shield tunneling machine in a single-bore, double-track tunnel as described in claim 2, is characterized in that... The second towing system also includes a connecting base plate (5), which is located on the lifting section (18), and a second fixed pulley (9) is provided at one end of the connecting base plate (5) near the sinking section (17).

4. The launching trailer for a large-diameter shield tunneling machine in a single-bore, double-track tunnel as described in claim 3, is characterized in that... The middle plate (3) is provided with a fifth fixed pulley (12) at one end near the sinking section (17), and the fifth fixed pulley (12) corresponds to the second winch (6).

5. The launching trailer for a large-diameter shield tunneling machine in a single-bore, double-track tunnel as described in claim 4, characterized in that, The fifth fixed pulley (12) is vertically aligned with the second fixed pulley (9).

6. The launching trailer for a large-diameter shield tunneling machine in a single-bore, double-track tunnel as described in claim 1, characterized in that, The top plate (2) is provided with a connecting beam (16) at one end near the sunken section (17), the connecting beam (16) is provided with a crossbeam (15), and the crossbeam (15) is provided with a first fixed pulley (8).

7. The launching trailer for a large-diameter shield tunneling machine in a single-bore, double-track tunnel as described in claim 1, characterized in that, The mounting base plate (4) is provided with a third fixed pulley (10), and the steel cable of the first winch (7) is threaded between the third fixed pulley (10) and the fourth fixed pulley (11).

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