Auxiliary device for shield tunneling machine empty-pushing underground excavation tunnel and shield tunneling machine

Abstract

The utility model discloses an auxiliary device for an empty-pushing underground excavation tunnel of a shield tunneling machine and the shield tunneling machine, and relates to the technical field of shield tunneling engineering. The auxiliary device comprises a guide table arranged on a substrate and a telescopic structure connected to a pushing oil cylinder of the shield tunneling machine; a reserved hole is formed in the guide table; the telescopic structure comprises a main arm connected to the thrust oil cylinder, an auxiliary arm is hinged to the main arm, and a pushing structure is connected between the main arm and the auxiliary arm. According to the auxiliary device, through the guide table, the reserved hole, the propelling oil cylinder and the automatic telescopic device, full-automatic empty pushing and underground excavation of the interval tunnel by the shield tunneling machine are achieved, the construction efficiency is improved, an automatic empty pushing and underground excavation tunnel construction method of the shield tunneling machine is formed, the construction safety is guaranteed, material and personnel input is reduced, and the construction cost is reduced. And a series of problems of complex dismantling process, high safety risk coefficient, large personnel investment and the like of the negative ring duct piece in the underground excavation tunnel are successfully solved.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel engineering technology, specifically to an auxiliary device for shield tunneling machine to excavate tunnels using air thrust and a shield tunneling machine. Background Technology

[0002] During urban subway construction, shield tunneling is often hampered by geological factors (e.g., high-gas tunnels) and environmental factors (e.g., tunneling under existing lines or important buildings / structures), meaning that shield tunneling cannot be used exclusively between two stations. Regulations stipulate that high-gas tunnels cannot be constructed using shield tunneling, and when tunneling under existing subway lines, mining methods are typically used to ensure the safety of subway operations, with the tunnel boring machine (TBM) then directly passing through this section. Based on these considerations, tunnels between two stations are usually constructed using a combination of shield tunneling and mining methods. Once the shield tunneling is completed, a cut-and-cover tunnel is needed to reach the working shaft before the equipment can be hoisted out.

[0003] Currently, when the tunnel section is long, ventilation shafts are usually installed in the middle of the tunnel to ensure ventilation safety. Therefore, the tunnel boring machine (TBM) starts from the station, passes through the ventilation shaft, and then arrives at the station for reception. When passing through the ventilation shaft, a negative ring processing device is usually used. After the TBM passes through the ventilation shaft, the negative ring and the tooling device need to be removed.

[0004] Therefore, conventional tunnel boring machines (TBMs) use negative ring processing devices to pass through mined tunnels, or use rail clamps and steel plates to push the TBM through mined tunnels without load. However, the working face of a typical subway mined tunnel is small, which is not conducive to the above construction methods. Moreover, all of these methods have problems such as high safety risk coefficient, long construction period, and high cost. Utility Model Content

[0005] The technical problem this invention aims to solve is the high safety risk factor, long construction period, and high cost associated with current tunnel boring machines (TBMs) pushing tunnels through mined tunnels without air. Based on this, an auxiliary device and a TBM for TBMs pushing tunnels through mined tunnels without air are proposed. This auxiliary device enables the TBM to automatically push tunnels through mined tunnels without air, without the need to install or remove negative rings, tooling, etc. It also reduces the number of workers, saves construction costs, and improves the safety of the construction process.

[0006] This utility model is achieved through the following technical solution:

[0007] In a first aspect, this application provides an auxiliary device for tunnel boring machines (TBMs) to excavate tunnels using air thrust, including a guide platform mounted on a substrate and a telescopic structure connected to the propulsion cylinder of the TBM; the guide platform is provided with pre-reserved holes; the telescopic structure includes a main arm connected to the propulsion cylinder, a secondary arm hinged to the main arm, and a pushing structure connecting the main arm and the secondary arm.

[0008] Furthermore, the pushing structure includes a pushing cylinder, the telescopic end of which is connected to the auxiliary arm.

[0009] Furthermore, both the main boom and the auxiliary boom are connected to mounting bases, and the two ends of the push cylinder are respectively connected to the mounting bases of the main boom and the auxiliary boom.

[0010] Furthermore, the reserved hole is provided with a slope inside, and when the auxiliary arm is subjected to force in the reserved hole, the end of the auxiliary arm abuts against the slope of the reserved hole.

[0011] Furthermore, the end of the auxiliary arm is connected to an abutment plate for abutting against the slope of the reserved hole.

[0012] Furthermore, the outer diameter of the abutment plate is larger than the outer diameter of the secondary arm.

[0013] Furthermore, an arc-shaped surface is provided inside the reserved hole, and the arc-shaped surface is directly opposite the slope.

[0014] Furthermore, the main arm and the propulsion cylinder are connected by welding or detachable connectors.

[0015] Furthermore, the detachable connector includes connections using bolt assemblies or threaded connections.

[0016] Secondly, this application provides a tunnel boring machine, including the aforementioned auxiliary device.

[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0018] (1) The auxiliary device of this utility model realizes the fully automated air-push tunneling section of the shield machine through the guide platform, reserved cavity, propulsion cylinder and automatic telescopic device, which improves the construction efficiency and forms an automated air-push tunneling construction method of shield machine, which ensures construction safety, reduces material and personnel input, and successfully solves a series of problems such as complex process of removing negative ring segments in tunneling section, high safety risk coefficient and large personnel input.

[0019] (2) By setting a ramp inside the reserved hole, the end of the auxiliary arm can better abut against the reserved hole and be more stable.

[0020] (3) By setting an arc-shaped surface in the reserved hole, this utility model can make the operating space of the push cylinder connected between the main arm and the auxiliary arm larger, that is, the rotation range of the auxiliary arm is larger.

[0021] (4) In this utility model, the main boom and the propulsion cylinder are connected by a detachable connection structure, which makes it easy to disassemble when the telescopic structure needs to be replaced; the main boom and the propulsion cylinder are connected by welding, which makes the connection between the main boom and the propulsion cylinder more solid and the operation more stable. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the push structure connecting the main arm and the auxiliary arm in this utility model;

[0024] Figure 2 for Figure 1 Enlarged view of A in the middle;

[0025] Figure 3 This is a schematic diagram of the structure of an auxiliary device for tunnel boring machine (TBM) air-push tunnel excavation when in use.

[0026] Figure 4 for Figure 3 A longitudinal sectional view;

[0027] Figure 5 for Figure 4 Enlarged view of B in the middle;

[0028] Figure 6 for Figure 3 A cross-sectional view;

[0029] Figure 7 for Figure 6 A magnified view of C.

[0030] The attached diagram shows the markings and corresponding component names:

[0031] 1-Initial support, 2-Secondary lining, 3-Shield machine, 4-Propulsion cylinder, 5-Main boom, 6-Pushing cylinder, 7-Auxiliary boom, 8-Reserved hole, 9-Guide platform, 10-Working shaft, 11-Shield machine trolley, 12-Tunnel portal, 13-Cut tunnel, 14-Shield tunnel, 15-Battery vehicle, 16-Slope, 17-Curved surface, 18-Abutment plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a joint, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0036] Example 1

[0037] like Figures 1-7 As shown, this embodiment provides an auxiliary device for tunnel boring machine (TBM) to excavate tunnels by air thrust, including a guide platform 9 set on a substrate and a telescopic structure connected to the propulsion cylinder 4 of the TBM 3; the guide platform 9 is provided with a reserved hole 8; the telescopic structure includes a main arm 5 connected to the propulsion cylinder 4, a secondary arm 7 hinged on the main arm 5, and a push structure connecting the main arm 5 and the secondary arm 7.

[0038] In this embodiment, the substrate includes an initial support 1 and a secondary substrate 2, with the guide platform 9 disposed on the secondary substrate 2.

[0039] Specifically, the pushing structure includes a pushing cylinder 6, the telescopic end of which is connected to the auxiliary boom 7; both the main boom 5 and the auxiliary boom 7 are connected to mounting seats, and the two ends of the pushing cylinder 6 are respectively connected to the mounting seats of the main boom 5 and the auxiliary boom 7. The auxiliary boom 7 is rotated by pushing the pushing cylinder 6.

[0040] Specifically, the end of the auxiliary arm 7 is connected to an abutment plate 18 for abutting against the ramp 16 of the reserved hole 8, and the outer diameter of the abutment plate 18 is larger than the outer diameter of the auxiliary arm 7.

[0041] During actual installation, the initial support 1 of the tunnel 13 is completed, and then the secondary substrate 2, the reserved hole 8, and the guide platform 9 are completed simultaneously. After the track is laid, the shield machine 3 is separated, and the telescopic structure main arm 5, the push cylinder 6, and the auxiliary arm 7 are welded on the propulsion cylinder 4 of the shield body.

[0042] In practical use, it has the following workflow:

[0043] Step 1: Complete the initial support 1 in the mined tunnel 13.

[0044] Step 2: After completing the construction of the secondary substrate 2, the reserved holes 8, and the guide platform 9, and after the strength is achieved, the track is laid to make sufficient preparations for the air thrust of the tunnel boring machine 3.

[0045] Step 3: When the tunnel boring machine 3 has completed the excavation of the shield tunnel 14 and reached the mined tunnel 13, the shield machine 3 vehicle in the shield machine 3 is disconnected, and the telescopic structure of the main boom 5, the push cylinder 6 and the auxiliary boom 7 are welded on the propulsion cylinder 4.

[0046] Step 4: Retract the propulsion cylinder 4 and the push cylinder 6 of the telescopic structure, so that the auxiliary arm 7 of the telescopic structure is subjected to force on the reserved hole 8. To ensure uniform force distribution, the angle of the auxiliary arm 7 of the telescopic structure can be adjusted according to the push cylinder 6 of the telescopic structure to ensure that it is close to the reserved hole 8. Extend the propulsion cylinder 4 to move the shield body of the tunnel boring machine 3 forward.

[0047] Step 5: After the shield body of the tunnel boring machine 3 has moved forward, the propulsion cylinder 4 is retracted, and the push cylinder 6 of the telescopic structure is extended to make the auxiliary boom 7 of the telescopic structure horizontal. Step 4 is repeated to push the shield body into the working shaft 10 for empty excavation.

[0048] Step 6: After the shield body of the tunnel boring machine 3 is pushed out of the tunnel 13, the shield machine trolley 11 is then pushed through the tunnel portal 12 to the working shaft 10 and lifted out.

[0049] In this embodiment, the auxiliary device, through the guide platform 9, the reserved cavity, the propulsion cylinder 4, and the automatic telescopic device, realizes the fully automated air-push tunneling section of the shield machine 3, improves construction efficiency, and forms an automated air-push tunneling method for the shield machine 3 to excavate the tunnel 13. This ensures construction safety, reduces material and personnel input, and successfully solves a series of problems such as the complex process of removing the negative ring segment inside the tunnel 13, the high safety risk factor, and the large personnel input.

[0050] Example 2

[0051] Based on Embodiment 1, this embodiment provides an auxiliary device for tunnel boring machines (TBMs) to excavate tunnels using air thrust. Unlike Embodiment 1, this embodiment includes a ramp 16 inside the pre-reserved hole 8. When the auxiliary boom 7 is subjected to force within the pre-reserved hole 8, the end of the auxiliary boom 7 rests against the ramp 16 of the pre-reserved hole 8. Other technical features are identical to those of Embodiment 1.

[0052] Compared with Embodiment 1, the advantage of this embodiment is that by setting a ramp 16 inside the reserved hole 8, the end of the auxiliary arm 7 can better abut against the reserved hole 8 and is more stable.

[0053] Example 3

[0054] Based on Embodiment 2, this embodiment provides an auxiliary device for tunnel boring machines (TBMs) to excavate tunnels using air thrust. Unlike Embodiment 2, this embodiment also includes an arc-shaped surface 17 within the pre-reserved hole 8, which faces the slope 16. Other technical features are identical to those of Embodiment 2.

[0055] Compared with Embodiment 2, the advantage of this embodiment is that by setting an arc-shaped surface 17 in the reserved hole 8, the operating space of the push cylinder 6 connecting the main arm 5 and the auxiliary arm 7 can be larger, that is, the rotation range of the auxiliary arm 7 is larger.

[0056] Example 4

[0057] Based on Embodiment 3, this embodiment provides an auxiliary device for tunnel boring machines (TBMs) to excavate tunnels using air thrust. Unlike Embodiment 3, the main boom 5 and the propulsion cylinder 4 in this embodiment are connected by a detachable connection structure. The detachable connection includes bolted or threaded connections. Other technical features are identical to those of Embodiment 3.

[0058] Compared with Embodiment 3, the advantage of this embodiment is that the main boom 5 and the propulsion cylinder 4 are connected by a detachable connection structure, which makes it easy to disassemble when the telescopic structure needs to be replaced.

[0059] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An auxiliary device for tunnel boring machines (TBMs) excavating tunnels using air thrust, characterized in that, It includes a guide platform (9) set on the substrate and a telescopic structure connected to the propulsion cylinder (4) of the tunnel boring machine (3); the guide platform (9) is provided with a reserved hole (8); the telescopic structure includes a main arm (5) connected to the propulsion cylinder (4), a secondary arm (7) is hinged on the main arm (5), and a push structure is connected between the main arm (5) and the secondary arm (7).

2. The auxiliary device for tunnel boring machine (TBM) air-push excavation of tunnels according to claim 1, characterized in that, The pushing structure includes a pushing cylinder (6), the telescopic end of which is connected to the auxiliary arm (7).

3. An auxiliary device for tunnel boring machine (TBM) air-push excavation of tunnels according to claim 2, characterized in that, Mounting seats are connected to both the main arm (5) and the auxiliary arm (7), and the two ends of the push cylinder (6) are respectively connected to the mounting seats of the main arm (5) and the auxiliary arm (7).

4. An auxiliary device for tunnel boring machine (TBM) air-push excavation of tunnels according to claim 1, characterized in that, The reserved hole (8) is provided with a ramp (16). When the auxiliary arm (7) is subjected to force in the reserved hole (8), the end of the auxiliary arm (7) abuts against the ramp (16) of the reserved hole (8).

5. An auxiliary device for tunnel boring machine (TBM) air-push excavation of tunnels according to claim 4, characterized in that, The end of the auxiliary arm (7) is connected to an abutment plate (18) for abutting against the ramp (16) of the reserved hole (8).

6. An auxiliary device for tunnel boring machine (TBM) air-push excavation of tunnels according to claim 5, characterized in that, The outer diameter of the abutment plate is larger than the outer diameter of the secondary arm (7).

7. An auxiliary device for tunnel boring machine (TBM) air-push excavation of tunnels according to claim 4, characterized in that, The reserved hole (8) is also provided with an arc-shaped surface (17), which is directly opposite the slope (16).

8. An auxiliary device for tunnel boring machine (TBM) air-push excavation of tunnels according to claim 1, characterized in that, The main arm (5) and the propulsion cylinder (4) are connected by welding or detachable connectors.

9. An auxiliary device for tunnel boring machine (TBM) air-push excavation of tunnels according to claim 8, characterized in that, The detachable connectors include those using bolted assemblies or threaded connections.

10. A tunnel boring machine, characterized in that, Includes the auxiliary device as described in any one of claims 1 to 9.

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