TBM construction support device

Abstract

The application discloses a TBM construction supporting device, which comprises a ring-shaped air bag, which is sleeved on a tunnel boring machine girder and is filled with high-pressure gas; an arc-shaped steel, which is hollow inside and is provided with a spiral steel wire inside; a mechanical hand sequentially pushes a plurality of arc-shaped steels into the gap between the ring-shaped air bag and surrounding rock, so that the plurality of arc-shaped steels are connected with each other to form a ring, and the ring-shaped air bag is moved forward after the installation of the arc-shaped steels; and an arc-shaped steel mesh, which is sequentially pushed by the mechanical hand into the gap between the ring-shaped air bag and surrounding rock and is connected with each other to form a ring after the installation of the arc-shaped steel mesh; wherein a grouting hole is arranged on the arc-shaped steel, and a grouting device grouts the hollow inside of the arc-shaped steel through the grouting hole on the arc-shaped steel, so that the inside of the arc-shaped steel is filled with concrete slurry. The device can conveniently and efficiently support the surrounding rock after tunneling, and the supporting structure is not only high in supporting strength, but also convenient to assemble.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring technology. More specifically, this invention relates to a TBM construction support device. Background Technology

[0002] TBM (Tunnel Boring Machine) is a type of tunneling equipment used in mountain tunnel construction. With the continuous development of TBM equipment and construction technology, construction capabilities have also improved, promoting the excavation and implementation of long tunnel projects. TBMs mainly include open-face TBMs, double-shield TBMs, and single-shield TBMs. Open-face TBMs have gained the most widespread use and attention due to their strong geological adaptability and low cost. However, if the support capacity of an open-face TBM is severely insufficient, it will seriously restrict its tunneling speed. The open-face TBM construction method, support system, and support method provided in patent application number 202110988586.7 solves the technical problem that existing open-face TBMs cannot freely switch between steel arch support and tunnel support to meet different support requirements at different locations, and are greatly affected by the construction environment. While ensuring the traditional arch frame installation function, it adds the segment installation function, realizing free and rapid switching between steel arch frame and segment assembly modes. However, the structure disclosed above is complex and increases maintenance costs. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and / or defects, and to provide at least the advantages described below.

[0004] Another objective of this invention is to provide a TBM construction support device that can conveniently and efficiently support the surrounding rock after excavation. The support structure not only has high support strength but is also easy to assemble.

[0005] To achieve these objectives and other advantages of the present invention, the present invention provides a TBM construction support device, comprising:

[0006] An annular airbag, which is fitted onto the main beam of the tunnel boring machine and filled with high-pressure gas;

[0007] The arc-shaped steel is hollow inside, and a spiral steel wire is set inside the arc-shaped steel. The robot arm pushes multiple arc-shaped steels into the gap between the annular airbag and the surrounding rock in sequence, so that the multiple arc-shaped steels are connected to each other to form a circle. After the arc-shaped steels are installed, the annular airbag is moved forward.

[0008] The robotic arm sequentially pushes multiple arc-shaped steel meshes into the gap between the annular airbag and the surrounding rock, and connects the multiple arc-shaped steel meshes to form a circle. After the arc-shaped steel meshes are installed, the annular airbag continues to move forward to install the arc-shaped steel meshes.

[0009] The curved steel is provided with a grouting hole. After the curved steel is installed, the grouting device injects grout into the hollow interior of the curved steel through the grouting hole, so that the interior of the curved steel is filled with concrete grout.

[0010] Preferably, in the TBM construction support device, holes are provided on both sides of the arc-shaped steel. The number and spacing of the holes are adapted to the number and spacing of the reinforcing bars in the arc-shaped steel mesh. When the robotic arm pushes the arc-shaped steel mesh into the gap between the annular airbag and the surrounding rock, multiple reinforcing bar ends of the arc-shaped steel mesh are simultaneously inserted into the holes provided on the side of the arc-shaped steel.

[0011] Preferably, the TBM construction support device also has through holes on the arc-shaped steel to facilitate fixing the arc-shaped steel to the anchor rod inserted into the surrounding rock.

[0012] Preferably, the TBM construction support device has a dovetail groove at one end of the curved steel and a dovetail protrusion at the other end that matches the dovetail groove. The dovetail groove and the dovetail protrusion engage to connect multiple curved steel sections together. Similarly, a dovetail groove is provided at one end of the curved steel mesh, and a dovetail protrusion is provided at the other end that matches the dovetail groove. The dovetail groove and the dovetail protrusion engage to connect multiple curved steel mesh sections together.

[0013] Preferably, in the TBM construction support device, the length of the reinforcing bars in the arc-shaped steel mesh is greater than the length of the dovetail groove and the dovetail protrusion, so that the two ends of the reinforcing bars can be inserted into the holes provided on the side of the arc-shaped steel mesh.

[0014] Preferably, in the TBM construction support device, the annular airbag is mounted on an annular support frame, and the annular support frame is slidably mounted on the main beam of the tunnel boring machine.

[0015] Preferably, the TBM construction support device has three or four first slide rails spaced apart on the main beam of the tunnel boring machine, and the annular support frame is provided with a first protrusion adapted to the first slide rail. The annular support frame is connected to a first drive mechanism and slides back and forth reciprocally under the drive of the first drive mechanism.

[0016] Preferably, in the TBM construction support device, the distance between the annular airbag and the surrounding rock after inflation is less than the thickness of the arc-shaped steel, and the axial width of the annular airbag is less than the width of the arc-shaped steel.

[0017] Preferably, in the TBM construction support device, the robotic arm moves radially, slides back and forth, and rotates to install the arc-shaped steel and the arc-shaped steel mesh, specifically configured as follows:

[0018] An annular column is fitted onto the main beam of the tunnel boring machine. A second slide rail is provided on the main beam of the tunnel boring machine. A second protrusion adapted to the second slide rail is provided on the inner surface of the annular column to facilitate the rotation of the annular column around the main beam of the tunnel boring machine. A ring of meshing teeth is provided on the outer surface of one end of the annular column. A gear is provided below the annular column for meshing and transmission with the teeth on the annular column. The gear is connected to the output shaft of a second drive mechanism. Under the drive of the second drive mechanism, the annular column rotates.

[0019] A robotic arm is connected to the hydraulic rod of a hydraulic cylinder, which is slidably mounted on the annular column. The hydraulic cylinder is connected to a third drive mechanism, which drives the robotic arm to move back and forth.

[0020] The present invention has at least the following beneficial effects:

[0021] First, because annular airbags filled with high-pressure gas are installed around the main beam, a small gap is left between the airbags and the surrounding rock. When the robotic arm pushes an arc-shaped steel bar into this gap, the airbags support the steel bar, preventing it from falling. As the robotic arm pushes multiple arc-shaped steel bars into the gaps in sequence, they connect to form a circle. At this point, the arc-shaped steel bars forming the circle have their own supporting force, and the installation is complete. Then, the annular airbags are moved forward to continue the installation of the arc-shaped steel mesh. Through holes are also provided on the arc-shaped steel bars to facilitate fixing them to anchor rods inserted into the surrounding rock, further improving the supporting strength and stability of the arc-shaped steel bars.

[0022] Secondly, this invention also includes an arc-shaped steel reinforcement mesh. The robotic arm sequentially pushes multiple arc-shaped steel reinforcement meshes into the gap between the annular airbag and the surrounding rock, connecting them to form a circle. After the arc-shaped steel reinforcement mesh is installed, the annular airbag continues to move forward to install the arc-shaped steel. Therefore, the annular airbag provides support for the arc-shaped steel and the arc-shaped steel reinforcement mesh before they form a circle, facilitating their assembly. The alternating arrangement of the arc-shaped steel and the arc-shaped steel reinforcement mesh provides support for the surrounding rock.

[0023] Third, the present invention also provides holes on both sides of the arc-shaped steel. When the robotic arm pushes the arc-shaped steel mesh into the gap between the annular airbag and the surrounding rock, it simultaneously inserts multiple steel bar ends of the arc-shaped steel mesh into the holes provided on the side of the arc-shaped steel. In this way, the arc-shaped steel and the arc-shaped steel mesh are completely connected together, forming a strong support structure for the surrounding rock.

[0024] Fourth, the present invention provides a grouting hole on the arc-shaped steel. After the arc-shaped steel is installed, the grouting device can inject grout into the hollow interior of the arc-shaped steel through the grouting hole, so that the interior of the arc-shaped steel is filled with concrete grout. With this configuration, the arc-shaped steel, the spiral steel wire inside the arc-shaped steel and the solidified concrete work together to greatly enhance the supporting strength of the arc-shaped steel.

[0025] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the cross-sectional structure of the arc-shaped steel in the TBM construction support device after installation in one embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the cross-sectional structure of the arc-shaped steel in the TBM construction support device according to one embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the cross-sectional structure of the robot arm in the TBM construction support device according to one embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the cross-sectional structure of the arc-shaped steel mesh in the TBM construction support device in one embodiment of the present invention. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0031] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not imply the presence or addition of one or more other elements or combinations thereof.

[0032] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0033] like Figures 1 to 4 As shown, the TBM construction support device provided in this embodiment of the invention includes: an annular airbag 2, which is sleeved on the main beam 3 of the tunnel boring machine and filled with high-pressure gas; an arc-shaped steel 1, which is hollow inside, with spiral steel wires 8 arranged inside the arc-shaped steel 1; a robotic arm sequentially pushes multiple arc-shaped steel 1s into the gap between the annular airbag 2 and the surrounding rock, so that multiple arc-shaped steel 1s are connected to each other to form a circle; after the arc-shaped steel 1s are installed, the annular airbag 2 is moved forward; and an arc-shaped steel mesh 13, which the robotic arm sequentially pushes into the gap between the annular airbag 2 and the surrounding rock. Multiple arc-shaped steel meshes 13 are pushed into the gap between the annular airbag 2 and the surrounding rock, and the multiple arc-shaped steel meshes 13 are connected to each other to form a circle. After the arc-shaped steel meshes 13 are installed, the annular airbag 2 continues to move forward to install the arc-shaped steel 1. A grouting hole is provided on the arc-shaped steel 1. After the arc-shaped steel 1 is installed, the grouting device injects grout into the hollow interior of the arc-shaped steel 1 through the grouting hole on the arc-shaped steel 1, so that the interior of the arc-shaped steel 1 is filled with concrete grout.

[0034] In the above embodiment, an annular airbag 2 is provided around the main beam 3. When in use, the annular airbag 2 is filled with high-pressure gas; when not in use, the high-pressure gas in the annular airbag 2 can be released. After the annular airbag 2 is filled with high-pressure gas, a small gap remains between the annular airbag 2 and the surrounding rock. Since the curved steel 1 or the curved steel mesh 13 is pushed into the space between the annular airbag 2 and the surrounding rock, in order to better push the curved steel 1 or the curved steel mesh 13 in without damaging the surface of the airbag, the surfaces of the curved steel 1 and the curved steel mesh 13 are made smooth, the side edges can be curved, and the ends of the wire mesh are also curved. However, to ensure the stability of the curved steel 1 or the steel mesh in the position between the annular airbag 2 and the surrounding rock, the surface of the annular airbag 2 has fine textures. In practice, the first arc-shaped steel bar 1 can be pushed to the bottom of the circle, then the second arc-shaped steel bar 1 can be pushed to the right or left to connect with the first arc-shaped steel bar 1. The remaining arc-shaped steel bars 1 can then be pushed into the gap between the annular airbag 2 and the surrounding rock. Alternatively, the first arc-shaped steel bar 1 can be pushed to the top of the circle, then the second can be pushed to the right or left to connect with the first arc-shaped steel bar 1. The pushing method for the arc-shaped steel mesh 13 is similar to that of the arc-shaped steel bar 1. The number of arc-shaped steel bars 1 and arc-shaped steel mesh 13 can be set to 5 or 6. Therefore, the annular airbag 2 can support the arc-shaped steel bars 1 and arc-shaped steel mesh 13 before they form a circle, maintaining their stability and facilitating their assembly. The curved steel 1 and the curved steel mesh 13 are alternately arranged. After installing one ring of curved steel, the annular airbag is pushed forward to install one ring of curved steel mesh, and then the annular airbag is pushed forward again to install one ring of curved steel. This alternating arrangement supports the surrounding rock. Furthermore, a grouting hole is provided on the curved steel 1. After the curved steel 1 is installed, the grouting device can inject grout into the hollow interior of the curved steel 1 through the grouting hole, filling the interior of the curved steel 1 with concrete grout. This arrangement, with the curved steel 1, the spiral steel wire 8 inside the curved steel 1, and the solidified concrete working together, greatly enhances the supporting strength of the curved steel 1. For specific installation, any commercially available grouting device can be used; this embodiment does not impose specific limitations. The curved steel mesh is specifically designed with horizontal and vertical steel bars interlaced and fixed. The horizontal steel bars are thick steel bars, and the vertical steel bars are thin steel bars.

[0035] In one specific embodiment, the TBM construction support device has holes 5 on both sides of the arc-shaped steel 1. The number and spacing of the holes 5 are adapted to the number and spacing of the steel bars in the arc-shaped steel mesh 13. When the robotic arm pushes the arc-shaped steel mesh 13 into the gap between the annular airbag 2 and the surrounding rock, it simultaneously inserts multiple steel bar ends of the arc-shaped steel mesh 13 into the holes 5 on the side of the arc-shaped steel 1.

[0036] In the above embodiment, multiple steel bar ends of the arc-shaped steel mesh 13 are inserted into the holes 5 provided on the side of the arc-shaped steel 1, thus completely connecting the arc-shaped steel 1 and the arc-shaped steel mesh 13 together, forming a strong support structure for the surrounding rock. Furthermore, this arrangement further ensures the positional stability of the arc-shaped steel 1 or the arc-shaped steel mesh 13 when the robotic arm pushes them sequentially. After the ends of multiple steel bars (the ends of the transverse steel bars) in the first arc-shaped steel mesh 13 are inserted into the holes 5 of the arc-shaped steel 1, the position of the first arc-shaped steel mesh 13 stabilizes. The middle of the first arc-shaped steel mesh 13 is then supported by the annular airbag 2, and the first arc-shaped steel mesh 13 will essentially not move further. Thus, the second, third, and so on can be pushed until the arc-shaped steel mesh 13 forms a circle. Similarly, when an arc-shaped steel mesh 13 is set up, and then an arc-shaped steel bar 1 is set up, once the end of the steel bar of the arc-shaped steel mesh 13 is inserted into the hole 5 of the first arc-shaped steel bar 1, the position of the first arc-shaped steel bar 1 stabilizes. The middle position of the first arc-shaped steel bar 1 is further supported by the annular airbag 2, and it will essentially not move further. The number of holes 5 and the number of steel bars in the arc-shaped steel mesh 13 are not specifically limited in this embodiment and can be set according to actual conditions. The diameter of the end of the steel bar inserted into the hole 5 can be the same as or smaller than the diameter of the steel bar.

[0037] In one specific embodiment, the TBM construction support device further includes through holes in the arc-shaped steel 1 to facilitate fixing the arc-shaped steel 1 to the anchor rod inserted into the surrounding rock. Fixing the arc-shaped steel 1 to the anchor rod further enhances its supporting strength.

[0038] In one specific embodiment, the TBM construction support device has a dovetail groove 7 at one end of the arc-shaped steel 1 and a dovetail protrusion 6 at the other end that matches the dovetail groove 7. The dovetail groove 7 and the dovetail protrusion 6 engage to connect multiple arc-shaped steel 1s together. Similarly, a dovetail groove 7 is provided at one end of the arc-shaped steel mesh 13, and a dovetail protrusion 6 at the other end that matches the dovetail groove 7. The dovetail groove 7 and the dovetail protrusion 6 engage to connect multiple arc-shaped steel meshes 13s together. Specifically, in the arc-shaped steel mesh 13, the length of the steel bars is greater than the length of the dovetail groove 7 and the dovetail protrusion 6, so that both ends of the steel bars can be inserted into the holes 5 provided on the side of the arc-shaped steel 1.

[0039] In the above embodiment, dovetail grooves 7 are provided at one end of both the arc-shaped steel 1 and the arc-shaped steel mesh 13, and dovetail protrusions 6 are provided at the other end. When setting the dovetail grooves and protrusions on the arc-shaped steel mesh, the dovetail grooves and protrusions can be prefabricated and then welded to the ends of the vertically arranged steel bars. The advantage of this arrangement is that when the second arc-shaped steel 1 is pushed, the dovetail protrusion 6 of the second arc-shaped steel 1 is precisely inserted into the dovetail groove 7 at the end of the first arc-shaped steel 1. When the second arc-shaped steel 1 is pushed to the designated position, the second arc-shaped steel 1 is already connected to the first arc-shaped steel 1. The connection method of the arc-shaped steel mesh 13 is the same as that of the arc-shaped steel 1. This connection method provides a very strong connection and facilitates the sequential connection of multiple arc-shaped steel 1s or arc-shaped steel meshes 13.

[0040] In one specific embodiment, the TBM construction support device includes an annular airbag 2 mounted on an annular support frame 4. The annular support frame 4 is slidably mounted on the main beam 3 of the tunnel boring machine. Specifically, three or four first slide rails 14 are spaced apart on the main beam 3 of the tunnel boring machine. The annular support frame 4 is provided with a first protrusion that matches the first slide rail 14. The annular support frame 4 is connected to a first drive mechanism and slides back and forth reciprocally under the drive of the first drive mechanism.

[0041] In the above embodiment, placing the annular airbag 2 on the annular support frame 4 further ensures the position and stability of the annular airbag 2 and facilitates its forward and backward movement. The first driving mechanism can be a drive motor, a hydraulic cylinder, or a pneumatic cylinder. Specifically, the annular support frame 4 has a groove-shaped edge to accommodate the edge of the annular airbag 2. The width of the annular airbag 2 can be 20-30cm, the width of the arc-shaped steel 1 can be 40-80cm, and the width of the arc-shaped steel mesh 13 can be 60-100cm.

[0042] In one specific embodiment, in the TBM construction support device, the distance between the annular airbag 2 and the surrounding rock after inflation is less than the thickness of the arc-shaped steel 1, and the axial width of the annular airbag 2 is less than the width of the arc-shaped steel 1.

[0043] In one specific embodiment, the TBM construction support device, wherein the robotic arm moves radially, slides back and forth, and rotates to install the arc-shaped steel 1 and the arc-shaped steel mesh 13, specifically configured as follows: an annular column 9 is sleeved on the main beam 3 of the tunnel boring machine, and a second sliding track is provided on the main beam 3 of the tunnel boring machine. A second protrusion adapted to the second sliding track is provided on the inner surface of the annular column, facilitating the rotation of the annular column around the main beam 3 of the tunnel boring machine. A ring of meshing teeth is provided on the outer surface of one end of the annular column. A gear is disposed below the annular column for meshing with the teeth on the annular column for transmission. The gear is connected to the output shaft of a second drive mechanism. Under the drive of the second drive mechanism, the annular column rotates. Preferably, the second drive mechanism is a drive motor. A manipulator 10 is connected to the hydraulic rod 12 of a hydraulic cylinder 11. Under the action of the hydraulic cylinder, the manipulator moves radially. The hydraulic cylinder is slidably disposed on the annular column. The hydraulic cylinder is connected to a third drive mechanism. Under the drive of the third drive mechanism, the manipulator moves back and forth. The third drive mechanism can be a hydraulic cylinder or a pneumatic cylinder.

[0044] In the above embodiments, the robot arm achieves rotation, radial movement, and forward and backward movement. This robot arm is used for both the assembly of the arc-shaped steel 1 and the arc-shaped steel mesh 13. Specifically, the robot arm is positioned forward of the annular airbag 2, meaning the annular column is positioned forward of the first slide rail 14. In this embodiment, forward movement always points in the tunneling direction. Therefore, the forward movement of the annular airbag 2 does not affect the robot arm.

[0045] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the TBM construction support device of the present invention will be readily apparent to those skilled in the art.

[0046] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A TBM construction support device, characterized in that, include: An annular airbag, which is fitted onto the main beam of the tunnel boring machine and filled with high-pressure gas; The arc-shaped steel is hollow inside, and a spiral steel wire is set inside the arc-shaped steel. The robot arm pushes multiple arc-shaped steels into the gap between the annular airbag and the surrounding rock in sequence, so that the multiple arc-shaped steels are connected to each other to form a circle. After the arc-shaped steels are installed, the annular airbag is moved forward. The robotic arm sequentially pushes multiple arc-shaped steel meshes into the gap between the annular airbag and the surrounding rock, and connects the multiple arc-shaped steel meshes to form a circle. After the arc-shaped steel meshes are installed, the annular airbag continues to move forward to install the arc-shaped steel meshes. The arc-shaped steel is provided with a grouting hole. After the arc-shaped steel is installed, the grouting device injects grout into the hollow interior of the arc-shaped steel through the grouting hole, so that the interior of the arc-shaped steel is filled with concrete grout. The robotic arm performs radial movement, forward and backward sliding, and rotation to install the arc-shaped steel and the arc-shaped steel mesh. The specific configuration is as follows: An annular column is fitted onto the main beam of the tunnel boring machine. A second slide rail is provided on the main beam of the tunnel boring machine. A second protrusion adapted to the second slide rail is provided on the inner surface of the annular column to facilitate the rotation of the annular column around the main beam of the tunnel boring machine. A ring of meshing teeth is provided on the outer surface of one end of the annular column. A gear is provided below the annular column for meshing and transmission with the teeth on the annular column. The gear is connected to the output shaft of a second drive mechanism. Under the drive of the second drive mechanism, the annular column rotates. A robotic arm is connected to the hydraulic rod of a hydraulic cylinder, which is slidably mounted on the annular column. The hydraulic cylinder is connected to a third drive mechanism, which drives the robotic arm to move back and forth.

2. The TBM construction support device as described in claim 1, characterized in that, Holes are provided on both sides of the arc-shaped steel. The number and spacing of the holes are adapted to the number and spacing of the steel bars in the arc-shaped steel mesh. When the robotic arm pushes the arc-shaped steel mesh into the gap between the annular airbag and the surrounding rock, it simultaneously inserts multiple steel bar ends of the arc-shaped steel mesh into the holes provided on the side of the arc-shaped steel.

3. The TBM construction support device as described in claim 1, characterized in that, The curved steel is also provided with through holes to facilitate fixing the curved steel to the anchor rod inserted into the surrounding rock.

4. The TBM construction support device as described in claim 2, characterized in that, A dovetail groove is provided at one end of the curved steel, and a dovetail protrusion adapted to the dovetail groove is provided at the other end. The dovetail groove and the dovetail protrusion engage to connect multiple curved steel sections together. A dovetail groove is provided at one end of the curved steel mesh, and a dovetail protrusion adapted to the dovetail groove is provided at the other end. The dovetail groove and the dovetail protrusion engage to connect multiple curved steel mesh sections together.

5. The TBM construction support device as described in claim 4, characterized in that, In the arc-shaped steel mesh, the length of the steel bar is greater than the length of the dovetail groove and the dovetail protrusion, so that the two ends of the steel bar can be inserted into the holes provided on the side of the arc-shaped steel mesh.

6. The TBM construction support device as described in claim 1, characterized in that, The annular airbag is mounted on an annular support frame, which is slidably mounted on the main beam of the tunnel boring machine.

7. The TBM construction support device as described in claim 6, characterized in that, Three or four first slide rails are spaced apart on the main beam of the tunnel boring machine. The annular support frame is provided with a first protrusion that matches the first slide rail. The annular support frame is connected to a first drive mechanism and slides back and forth under the drive of the first drive mechanism.

8. The TBM construction support device as described in claim 6, characterized in that, After the annular airbag is inflated, the distance between it and the surrounding rock is less than the thickness of the arc-shaped steel, and the axial width of the annular airbag is less than the width of the arc-shaped steel.

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