Supporting device and supporting method for underground tunnel connection channel

Abstract

The invention belongs to the technical field of underground engineering construction, and discloses a supporting device and a supporting method for an underground tunnel connection channel. The supporting device for the underground tunnel connection channel comprises a supporting assembly, the supporting assembly comprises a plurality of arc-shaped supporting pieces which are rotationally connected with one another, and the supporting assembly has a folded state and an unfolded state; in the overlapping state, the multiple arc-shaped supporting pieces are overlapped; in the unfolding state, the multiple arc-shaped supporting pieces are rotationally opened to form an annular supporting structure so as to be supported on the inner wall face of the underground tunnel connecting channel. Through switching of the supporting assembly between the folding state and the unfolding state, the supporting assembly can be conveniently moved in the underground tunnel connection channel, the supporting assembly is controlled at the designated position in the underground tunnel connection channel, and due to the ground pre-assembly and underground deformation mode, the underground construction efficiency is improved, and the construction cost is reduced. And after installation and construction, the structural shape of the annular supporting structure meets preset requirements, and the construction precision and reliability are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of underground engineering construction, and particularly relates to a support device and a support method for an underground tunnel connection passage. Background Art

[0002] In the construction of underground tunnels for urban rail transit and urban rail transit, a steel support temporary structure is required to prevent the collapse of the connection passage during construction. The steel support usually uses a rectangular or quasi-rectangular steel frame significantly smaller than the tunnel diameter, and telescopic support rods are arranged around the frame plane to the tunnel segments to support the segments, resulting in a relatively small space for passage and work in the tunnel. As an improved solution, by using an annular steel support close to the tunnel, a larger passage and working space can be achieved. However, during installation construction, manual installation is required, with low precision, low automation level, slow installation speed, and it may not be possible to form a predetermined structural shape after installation construction, which may weaken the mechanical properties of the support to a certain extent. Moreover, when using a hand-operated jack, the magnitude of the prestress applied cannot be accurately controlled. Summary of the Invention

[0003] The purpose of the present invention is to provide a support device and a support method for an underground tunnel connection passage, which solves the problems of inconvenient installation and low installation efficiency of the annular steel support.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] A support device for an underground tunnel connection passage, comprising:

[0006] A support assembly, the support assembly includes a plurality of arc-shaped support members that are rotatably connected to each other, and the support assembly has a stacked state and an unfolded state; in the stacked state, the plurality of arc-shaped support members are stacked; in the unfolded state, the plurality of arc-shaped support members rotate and open to form an annular support structure to support on the inner wall surface of the underground tunnel connection passage.

[0007] In some embodiments, a plurality of force transfer supports are spaced apart on the outer convex arc walls of the plurality of arc-shaped support members, and in the unfolded state, the plurality of force transfer supports abut against the inner wall surface of the underground tunnel connection passage.

[0008] In some embodiments, in the unfolded state, adjacent two of the arc-shaped support members are fixedly connected by a connecting member.

[0009] In some embodiments, a rotation driving member is provided between two rotatably connected arc-shaped support members, and the rotation driving member is configured to drive the two arc-shaped support members to rotate relative to each other.

[0010] In some embodiments, the length of at least one of the arc-shaped support members is adjustable.

[0011] In some embodiments, at least one of the arc-shaped support members includes a first arc-shaped sub-support member and a second arc-shaped sub-support member. A linear drive member is provided between the first arc-shaped sub-support member and the second arc-shaped sub-support member, and two ends of the linear drive member are respectively hinged to the first arc-shaped sub-support member and the second arc-shaped sub-support member.

[0012] In some embodiments, the rotational drive member is an electric motor, and / or the linear drive member is a hydraulic jack.

[0013] In some embodiments, the support device for the underground tunnel connection passage further includes a moving base, and the moving base has a mounting platform, and the support assembly can be arranged on the mounting platform.

[0014] In some embodiments, a hook is provided on the mounting platform, and at least one of the arc-shaped support members is provided with a lifting ring, and the hook can be hooked on the lifting ring to fix the support assembly.

[0015] In some embodiments, a suspension rod is provided on the mounting platform, the lifting ring is arranged at the free end of the suspension rod, and the suspension rod can extend to lower at least one of the arc-shaped support members and press down the arc-shaped support member so that the arc-shaped support member abuts against the inner wall surface of the underground tunnel connection passage.

[0016] The present invention also provides a support method for an underground tunnel connection passage. By applying the support device for the underground tunnel connection passage provided by the present invention, the support method for the underground tunnel connection passage includes the following steps:

[0017] S1, hoist the support assembly in a stacked state into the working shaft;

[0018] S2, move the support assembly to a specified position in the underground tunnel connection passage;

[0019] S3, convert the support assembly to an unfolded state, and the support assembly abuts against and supports the inner wall surface of the underground tunnel connection passage.

[0020] In some embodiments, step S2 further includes: converting the support assembly in a stacked state to an unfolded state; then hoisting the moving base into the working shaft, driving the moving base to pass through the support assembly in the unfolded state, fixing the support assembly on the moving base and converting it to a stacked state; the moving base moves the support assembly in the stacked state to the specified position in the underground tunnel connection passage.

[0021] In some embodiments, the conversion process of the support assembly from the stacked state to the unfolded state in step S3 is:

[0022] The hook of the mobile base lowers the first arc-shaped support member in the support assembly, and presses down the first arc-shaped support member through the suspension rod, so that the force transmission support on the first arc-shaped support member abuts against the inner wall surface of the underground tunnel connection passage;

[0023] The rotation drive member drives the second arc-shaped support member to rotate relative to the first arc-shaped support member until the force transmission support on the second arc-shaped support member abuts against the inner wall surface of the underground tunnel connection passage, and fixes the first arc-shaped support member and the second arc-shaped support member;

[0024] Another rotation drive member drives the third arc-shaped support member to rotate relative to the first arc-shaped support member until the force transmission support on the third arc-shaped support member abuts against the inner wall surface of the underground tunnel connection passage, and fixes the first arc-shaped support member and the third arc-shaped support member;

[0025] The linear drive member on the first arc-shaped support member moves telescopically to fix the ends of the second arc-shaped support member and the third arc-shaped support member that are far from the first arc-shaped support member;

[0026] The hook and the first arc-shaped support member are released, and the mobile base returns to the working shaft to prepare for installing the next support assembly.

[0027] Advantages of the present invention:

[0028] The support device for the underground tunnel connection passage provided by the present invention includes a support assembly, and the support assembly is provided with a plurality of arc-shaped support members that are rotatably connected, so that the plurality of arc-shaped support members can be superposed by rotation, reducing the overall volume and facilitating the overall hoisting of the support assembly into the working shaft; and by switching the support assembly between the superposed state and the unfolded state, it is convenient to move the support assembly in the underground tunnel connection passage and control the support assembly at a specified position in the underground tunnel connection passage. Since it is a method of pre-assembly on the ground and deformation underground, the construction efficiency underground is improved, and the structural shape of the annular support structure after installation and construction meets the preset requirements, greatly improving the construction accuracy and reliability. Description of the drawings

[0029] Figure 1 is a schematic structural diagram of the support device for the underground tunnel connection passage provided by the embodiment of the present invention (the support assembly is in the unfolded state);

[0030] Figure 2 is a schematic structural diagram of the support assembly in the support device for the underground tunnel connection passage provided by the embodiment of the present invention in the superposed state;

[0031] Figure 3It is a schematic structural diagram of the support assembly in a disassembled state in the support device for an underground tunnel connection passage provided by an embodiment of the present invention;

[0032] Figure 4 It is a side view of the support assembly in a stacked state being transported by the mobile base in the support method for an underground tunnel connection passage provided by an embodiment of the present invention;

[0033] Figure 5 It is a front view of the support assembly in a stacked state being transported by the mobile base to a designated position in the support method for an underground tunnel connection passage provided by an embodiment of the present invention;

[0034] Figure 6 It is a state diagram of the hook lowering the first arc-shaped support member in the support method for an underground tunnel connection passage provided by an embodiment of the present invention;

[0035] Figure 7 It is a state diagram of the second arc-shaped support member rotating and opening in the support method for an underground tunnel connection passage provided by an embodiment of the present invention;

[0036] Figure 8 It is a state diagram of the third arc-shaped support member rotating and opening in the support method for an underground tunnel connection passage provided by an embodiment of the present invention;

[0037] Figure 9 It is a state diagram of the linear drive member driving the first arc-shaped support member to extend until the second arc-shaped support member and the third arc-shaped support member can be fixedly connected in the support method for an underground tunnel connection passage provided by an embodiment of the present invention;

[0038] Figure 10 It is a state diagram of the annular support structure supporting on the inner wall surface of the underground tunnel connection passage in the support method for an underground tunnel connection passage provided by an embodiment of the present invention.

[0039] In the figure:

[0040] 1. Support assembly; 11. First arc-shaped support member; 111. First arc-shaped sub-support member; 112. Second arc-shaped sub-support member; 12. Second arc-shaped support member; 13. Third arc-shaped support member; 14. Force transmission support; 15. Rotation drive member; 16. Linear drive member; 17. Hinge seat; 18. Suspension ring; 19. Connecting member;

[0041] 2. Mobile base; 21. Hook; 22. Suspension rod;

[0042] 3. Underground tunnel connection passage. Detailed implementation manners

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0044] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0046] In the description of this embodiment, the orientation or positional relationship such as "above", "below", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0047] As Figures 1-3 shown, an embodiment of the present invention provides a support device for an underground tunnel connection passage, including a support assembly 1. The support assembly 1 includes a plurality of arc-shaped support members that are rotatably connected to each other. The support assembly 1 has a stacked state and an unfolded state. In the stacked state, the plurality of arc-shaped support members are stacked. In the unfolded state, the plurality of arc-shaped support members rotate and open to form an annular support structure to support on the inner wall surface of the underground tunnel connection passage 3.

[0048] As Figure 2As shown, in the superposed state, multiple arc-shaped support members can be rotated to be superposed, reducing the overall volume, facilitating pre-assembling the support assembly 1 on the ground and then hoisting it as a whole into the working well, and improving the underground construction efficiency. By switching between the superposed state and the unfolded state of the support assembly 1, it is convenient to move the support assembly 1 in the underground tunnel connecting passage 3 and control the support assembly 1 at a specified position in the underground tunnel connecting passage 3. Since it is a method of pre-assembling on the ground and deforming underground, the underground construction efficiency is improved, and the structural shape of the annular support structure meets the preset requirements after installation and construction, greatly improving the construction accuracy and reliability.

[0049] This embodiment is described by taking the support assembly 1 including three arc-shaped support members as an example. As Figure 2 shown, the three arc-shaped support members are respectively a first arc-shaped support member 11, a second arc-shaped support member 12, and a third arc-shaped support member 13. In the superposed state, for the convenience of construction control, the concave arc of the first arc-shaped support member 11 faces upward, and after the second arc-shaped support member 12 and the third arc-shaped support member 13 are rotated and superposed, they face downward towards the first arc-shaped support member 11. In this way, it is convenient to automatically form an annular structure when the second arc-shaped support member 12 and the third arc-shaped support member 13 are rotated and opened relative to the first arc-shaped support member 11 with the concave arc facing upward; for a smaller volume, the second arc-shaped support member 12 is superposed above the third arc-shaped support member 13. Therefore, the arc length of the second arc-shaped support member 12 is set to be greater than the arc length of the third arc-shaped support member 13, which is beneficial to the second arc-shaped support member 12 and the third arc-shaped support member 13 having a smaller superposed height after superposition.

[0050] In some embodiments, a plurality of force transmission supports 14 are spaced apart on the outer convex arc walls of the multiple arc-shaped support members. In the unfolded state, the plurality of force transmission supports 14 abut against the inner wall surface of the underground tunnel connecting passage 3.

[0051] As Figure 3 shown, a plurality of force transmission supports 14 are spaced apart on the convex arc sides of the first arc-shaped support member 11, the second arc-shaped support member 12, and the third arc-shaped support member 13. As Figure 1 shown, in the unfolded state, the plurality of force transmission supports 14 abut against the inner wall surface of the underground tunnel connecting passage 3, which is used to transmit the acting force between the inner wall surface of the underground tunnel connecting passage 3 and the multiple arc-shaped support members, and can achieve balanced stress. The force transmission supports 14 are pre-fixed to the multiple arc-shaped support members on the ground, and the fixing method can be welding or bolt connection. One end of the force transmission support 14 facing the inner wall surface of the underground tunnel connecting passage 3 is set as a plane or an arc surface to facilitate reliable contact and stable support with the segment.

[0052] In some embodiments, in the unfolded state, adjacent two arc-shaped support members are fixedly connected through a connecting member 19.

[0053] AsFigure 1 As shown, when in the unfolded state, in order to improve the connection strength between the first arc-shaped support member 11 and the second arc-shaped support member 12, and to improve the connection strength between the first arc-shaped support member 11 and the third arc-shaped support member 13, after the second arc-shaped support member 12 and the third arc-shaped support member 13 are both rotated and unfolded in place, the rotation positions are fixed by the connecting member 19 to ensure the stable positions of the second arc-shaped support member 12 and the third arc-shaped support member 13. Further, when the positions of the first arc-shaped support member 11, the second arc-shaped support member 12, and the third arc-shaped support member 13 are all determined and can stably support on the inner wall surface of the underground tunnel connection passage 3, the second arc-shaped support member 12 and the third arc-shaped support member 13 are connected and fixed by the connecting member 19, which is beneficial for the first arc-shaped support member 11, the second arc-shaped support member 12, and the third arc-shaped support member 13 to maintain in the annular structure state. Among them, the connecting member 19 can adopt the method of multiple bolts cooperating with nuts, or a connecting plate can be added to assist the connection method of bolts and nuts, and the specific is not limited.

[0054] In some embodiments, a rotation driving member 15 is provided between two arc-shaped support members that are rotatably connected, and the rotation driving member 15 is configured to drive the two arc-shaped support members to rotate relative to each other.

[0055] As Figure 1 and Figure 2 shown, one rotation driving member 15 is respectively arranged at both ends of the first arc-shaped support member 11. One end of the rotation driving member 15 is connected to the first arc-shaped support member 11, and the other end is connected to the second arc-shaped support member 12 or the third arc-shaped support member 13, and is used to drive the second arc-shaped support member 12 and the third arc-shaped support member 13 to rotate and unfold or overlap respectively. In some feasible solutions, as Figure 3 shown, a hinge seat 17 is respectively provided at the end portions of the first arc-shaped support member 11 and the second arc-shaped support member 12. The two hinge seats 17 are hinged to each other, and the output ends of the rotation driving member 15 are respectively connected to the two hinge seats 17 to drive the two hinge seats 17 to rotate relative to each other. Further, the hinge seat 17 is arranged on the inner side wall of the arc-shaped support member, so as to facilitate the rotation and overlapping of multiple arc-shaped support members. The rotation driving member 15 can adopt an electric motor to realize the automatic rotation control between adjacent arc-shaped support members. When the two hinge seats 17 are respectively provided with hinge holes, a central axis is passed through the hinge holes, and the electric motor can drive the components on both sides to rotate relative to the central axis in the hinge holes. The electric motor is equipped with an automatic control system to facilitate the realization of automatic control.

[0056] In some embodiments, the length of at least one arc-shaped support member is adjustable.

[0057] As Figure 3As shown, taking the length adjustment of the first arc-shaped support member 11 as an example, the first arc-shaped support member 11 includes a first arc-shaped sub-support member 111 and a second arc-shaped sub-support member 112. A linear drive member 16 is provided between the first arc-shaped sub-support member 111 and the second arc-shaped sub-support member 112. Both ends of the linear drive member 16 are respectively hinged to the first arc-shaped sub-support member 111 and the second arc-shaped sub-support member 112. When the linear drive member 16 is in a contracted state, the first arc-shaped sub-support member 111 and the second arc-shaped sub-support member 112 are relatively far away from each other, and the first arc-shaped support member 11 has the maximum length, which is conducive to the top ends of the second arc-shaped support member 12 and the third arc-shaped support member 13 away from the first arc-shaped support member 11 to be able to abut and connect with each other to form a closed-loop annular support structure, greatly increasing the scope of application and the versatility. In order to facilitate the adaptive support of the annular support structure, both ends of the linear drive member 16 are respectively hinged to the first arc-shaped sub-support member 111 and the second arc-shaped sub-support member 112. The linear drive member 16 includes, but is not limited to, a hydraulic jack. The piston of the hydraulic jack is in a hinged form, and the stroke of the hydraulic jack is greater than 500 mm. The hydraulic jack is equipped with an automated operating system for easy automatic control. Preferably, the first arc-shaped sub-support member 111 and the second arc-shaped sub-support member 112 are symmetrically arranged at both ends of the linear drive member 16.

[0058] In some embodiments, the support device for the underground tunnel connection passage further includes a moving base 2. The moving base 2 has a mounting platform, and the support assembly 1 can be arranged on the mounting platform.

[0059] As Figure 1 shown, by setting the moving base 2, when the support assembly 1 is in an unfolded state, the moving base 2 can pass through the annular support structure formed by the support assembly 1, and after adjusting the position, fixedly install the support assembly 1, so that the support assembly 1 can be stacked or unfolded on the mounting platform. Furthermore, the support assembly 1 can be transported to any designated position in the underground tunnel connection passage 3 through the moving base 2, so that the support assembly 1 can perform state conversion with the mounting platform as the support and has sufficient supporting force to support the inner wall surface of the underground tunnel connection passage 3.

[0060] In some embodiments, a hook 21 is provided on the mounting platform, and at least one arc-shaped support member is provided with a hanging ring 18. The hook 21 can be hooked on the hanging ring 18 to fix the support assembly 1.

[0061] As Figures 1-3In the illustrated embodiment, a lifting ring 18 is provided on the inner concave arc of the first arc-shaped support member 11. The lifting hook 21 moves up and down and can hook the first arc-shaped support member 11. When the first arc-shaped support member 11 is in the unfolded state, the moving base 2 can move to a position where the lifting hook 21 is directly opposite to the lifting ring 18. Then, after the lifting hook 21 moves downward to hook the lifting ring 18, the support assembly 1 switches to the stacked state. The lifting hook 21 moves upward, driving the support assembly 1 to rise off the ground, and the moving base 2 can transport the support assembly 1 to a designated position. After stopping at the designated position, the lifting hook 21 descends again, dropping the first arc-shaped support member 11 onto the inner wall surface of the underground tunnel connection passage 3. After the support assembly 1 is fully unfolded into the unfolded state, the connection between the lifting hook 21 and the lifting ring 18 is released. At this time, the moving base 2 can be moved out for the transportation of the next support assembly 1. Through the cooperation of the lifting ring 18 and the lifting hook 21, the overall transportation and transfer of the support assembly 1 are realized, which is convenient, fast, and easy to operate. Preferably, when the first arc-shaped support member 11 includes a first arc-shaped sub-support member 111 and a second arc-shaped sub-support member 112, one lifting ring 18 is provided on each of the first arc-shaped sub-support member 111 and the second arc-shaped sub-support member 112. Correspondingly, two lifting hooks 21 are provided on the installation platform to achieve uniform force hanging and support of the first arc-shaped support member 11.

[0062] In some embodiments, a suspension rod 22 is provided on the installation platform. The lifting hook 21 is provided at the free end of the suspension rod 22. The suspension rod 22 can extend to lower at least one arc-shaped support member and apply a downward pressure to the arc-shaped support member, so that the arc-shaped support member abuts against the inner wall surface of the underground tunnel connection passage 3.

[0063] Again Figure 2 , the lifting hook 21 is arranged on the installation platform through the suspension rod 22. The lifting hook 21 and the suspension rod 22 can be an integral structure, and the lifting and lowering movement of the lifting hook 21 is driven by the lifting and lowering movement of the suspension rod 22. By arranging the lifting hook 21 on the suspension rod 22, when the lifting hook 21 lowers the first arc-shaped support member 11 until the first arc-shaped support member 11 (or the force transmission support 14 on its outer side) abuts against the inner wall surface of the underground tunnel connection passage 3, the suspension rod 22 can provide a downward pressure on the first arc-shaped support member 11 through the lifting hook 21, so that a reliable frictional force is formed between the first arc-shaped support member 11 or its force transmission support 14 and the inner wall surface of the underground tunnel connection passage 3. Generally, the up and down telescopic stroke of the suspension rod 22 driving the lifting hook 21 is greater than 0.8 m. To further ensure that the lifting hook 21 provides sufficient downward pressure on the first arc-shaped support member 11, a counterweight is also provided on the installation platform.

[0064] The present invention also provides a support method for an underground tunnel connection passage. Applying the support device for an underground tunnel connection passage provided by the present invention, combined with Figures 4-10 , the support method for an underground tunnel connection passage includes the following steps:

[0065] S1. Lift the support assembly 1 in the stacked state into the working well.

[0066] S2. Move the support assembly 1 to a designated position inside the underground tunnel connecting passage 3.

[0067] S3. Convert the support assembly 1 to the deployed state, and the support assembly 1 abuts against and supports the inner wall surface of the underground tunnel connecting passage 3.

[0068] Through the above steps, the support assembly 1 can be assembled on the ground. In the stacked state with a smaller volume, it is suitable for being lifted into the working well; and it can be moved to any designated position inside the underground tunnel connecting passage 3 in the stacked state for deployment and support, without on-site assembly, improving the support efficiency and versatility of the support assembly 1.

[0069] In some embodiments, step S2 further includes: converting the support assembly 1 in the stacked state to the deployed state; then lifting the moving base 2 into the working well, driving the moving base 2 through the support assembly 1 in the deployed state, fixing the support assembly 1 on the moving base 2 and converting it to the stacked state; and the moving base 2 moves the support assembly 1 in the stacked state to a designated position inside the underground tunnel connecting passage 3.

[0070] As Figure 2 shown, when the support assembly 1 is in the stacked state, lift the support assembly 1 into the working well; and convert the support assembly 1 from the stacked state to the deployed state; then lower the moving base 2 into the working well, drive the moving base 2 to straddle the support assembly 1 (which is a ring-shaped support structure at this time), so that the hook 21 on the moving base 2 is aligned with the lifting ring 18 on the support assembly 1 and is hung and connected; the support assembly 1 is converted to the stacked state again, and the hook 21 rises to lift the support assembly 1 away from the inner wall surface of the underground tunnel connecting passage 3, as Figure 4 shown; the moving base 2 moves the support assembly 1 in the stacked state to a designated position inside the underground tunnel connecting passage 3, as Figure 5 .

[0071] By providing the support assembly 1 with a stacked state and a deployed state, the support assembly 1 can be switched between the stacked state and the deployed state as needed, facilitating the lowering of the support assembly 1 and the moving base 2 into the working well respectively, and facilitating the fixing and transportation of the moving base 2 and the support assembly 1, improving the versatility and applicability of the support device for the underground tunnel connecting passage, and greatly improving the support efficiency of the support method for the underground tunnel connecting passage. Among them, the moving base 2 can adopt a transport and assembly vehicle, which is driven by a driver. The moving base 2 can also be electrically driven, and driving wheels are provided below the moving base 2 to facilitate straddling the bottom first arc-shaped support member 11 of the support assembly 1.

[0072] In some embodiments, the conversion process of the support assembly 1 from the stacked state to the unfolded state in step S3 is as follows:

[0073] As Figure 6 shown, the hook 21 of the moving base 2 lowers the first arc-shaped support 11 in the support assembly 1, and presses down the first arc-shaped support 11 through the suspension rod 22, so that the force transmission support 14 on the first arc-shaped support 11 abuts against the inner wall surface of the underground tunnel connection passage 3; wherein, the suspension rod 22 can apply a downward pressure to the first arc-shaped support 11 through the hook 21, so that a reliable frictional force is formed between the force transmission support 14 of the first arc-shaped support 11 and the inner wall surface of the underground tunnel connection passage 3.

[0074] As Figure 7 shown, the rotation driving member 15 drives the second arc-shaped support 12 to rotate relative to the first arc-shaped support 11 until the force transmission support 14 on the second arc-shaped support 12 abuts against the inner wall surface of the underground tunnel connection passage 3, and the first arc-shaped support 11 and the second arc-shaped support 12 are fixed; the fixing method can be bolt-nut fixing or combined fixing with a fixing plate and bolt-nuts to keep the relative positions of the first arc-shaped support 11 and the second arc-shaped support 12 stable.

[0075] As Figure 8 shown, another rotation driving member 15 drives the third arc-shaped support 13 to rotate relative to the first arc-shaped support 11 until the force transmission support 14 on the third arc-shaped support 13 abuts against the inner wall surface of the underground tunnel connection passage 3, and the first arc-shaped support 11 and the third arc-shaped support 13 are fixed; the fixing method can be bolt-nut fixing or combined fixing with a fixing plate and bolt-nuts to keep the relative positions of the first arc-shaped support 11 and the third arc-shaped support 13 stable. At this time, there may be a gap between the ends of the second arc-shaped support 12 and the third arc-shaped support 13 facing away from the first arc-shaped support 11 or the abutting force against the inner wall surface of the underground tunnel connection passage 3 is insufficient.

[0076] As Figure 9 shown, the linear driving member 16 on the first arc-shaped support 11 moves telescopically to fix the ends of the second arc-shaped support 12 and the third arc-shaped support 13 away from the first arc-shaped support 11;

[0077] After the linear driving member 16 extends, the first arc-shaped sub-support member 111 and the second arc-shaped sub-support member 112 relatively push the ends of the second arc-shaped support member 12 and the third arc-shaped support member 13 that are away from the first arc-shaped support member 11 to approach each other. At this time, the ends of the second arc-shaped support member 12 and the third arc-shaped support member 13 can be fixedly connected. According to the pressure feedback of the multiple force transmission supports 14, or according to the relationship between the inner wall aperture of the underground tunnel connection passage 3 and the preset size of the annular support structure, the extension of the linear driving member 16 can be continuously adjusted so that the outer side wall of the annular support structure abuts and supports against the inner wall surface of the underground tunnel connection passage 3 (i.e., the inner wall surface of the segment).

[0078] As Figure 10 , after the annular support structure is fixedly connected, the lifting hook 21 and the first arc-shaped support member 11 can be released. The suspension rod 22 drives the lifting hook 21 to rise and completely detach from the first arc-shaped support member 11. The moving base 2 returns to the working shaft to prepare for installing the next support assembly 1. The fixed annular support structure supports on the inner wall surface of the underground tunnel connection passage 3.

[0079] Repeat the above steps S1 - S3 until all the required support assemblies 1 in the underground tunnel connection passage 3 are installed.

[0080] When the project is completed, the support assembly 1 can be switched back to the stacked state for recycling and reuse.

[0081] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A support device for an underground tunnel connection passage, characterized in that, Comprising: A support assembly (1), the support assembly (1) comprising a plurality of arc-shaped support members rotatably connected to each other, the support assembly (1) having a stacked state and an unfolded state; in the stacked state, the plurality of arc-shaped support members are stacked; In the unfolded state, the plurality of arc-shaped support members rotate and open to form an annular support structure to support against the inner wall surface of the underground tunnel connection passage (3).

2. The support device for the underground tunnel connection passage according to claim 1, characterized in that, A plurality of force transmission supports (14) are arranged at intervals on the outer convex arc walls of the plurality of arc-shaped support members, and in the unfolded state, the plurality of force transmission supports (14) abut against the inner wall surface of the underground tunnel connection passage (3).

3. The support device for the underground tunnel connection passage according to claim 2, characterized in that, In the unfolded state, adjacent two of the arc-shaped support members are fixedly connected by a connecting member (19).

4. The support device for the underground tunnel connection passage according to claim 2, characterized in that, A rotation driving member (15) is arranged between two rotatably connected arc-shaped support members, and the rotation driving member (15) is configured to drive the two arc-shaped support members to rotate relative to each other.

5. The support device for the underground tunnel connection passage according to claim 4, wherein, The length of at least one of the arc-shaped support members is adjustable.

6. The support device for the underground tunnel connection passage according to claim 5, characterized in that, At least one of the arc-shaped support members comprises a first arc-shaped sub-support member (111) and a second arc-shaped sub-support member (112), a linear driving member (16) is arranged between the first arc-shaped sub-support member (111) and the second arc-shaped sub-support member (112), and two ends of the linear driving member (16) are respectively hinged to the first arc-shaped sub-support member (111) and the second arc-shaped sub-support member (112).

7. The support device for the underground tunnel connection passage according to claim 6, characterized in that, The rotation driving member (15) is an electric motor, and / or the linear driving member (16) is a hydraulic jack.

8. The support device for the underground tunnel connection passage according to claim 1, characterized in that, It further comprises a moving base (2), the moving base (2) having a mounting platform, and the support assembly (1) can be arranged on the mounting platform.

9. The support device for the underground tunnel connecting passage according to claim 8, characterized in that, A lifting hook (21) is arranged on the mounting platform, at least one of the arc-shaped support members is provided with a lifting ring (18), and the lifting hook (21) can be hooked on the lifting ring (18) to fix the support assembly (1).

10. The support device for the underground tunnel connection passage according to claim 9, characterized in that, A suspension rod (22) is arranged on the mounting platform, the lifting ring (18) is arranged at the free end of the suspension rod (22), and the suspension rod (22) can extend to lower at least one of the arc-shaped support members and press down on the arc-shaped support member so that the arc-shaped support member abuts against the inner wall surface of the underground tunnel connection passage (3).

11. Support method for connecting passage of underground tunnel, characterized in that, Applying the support device for an underground tunnel connection passage according to any one of claims 1-10, the support method for the underground tunnel connection passage comprises the following steps: S1, hoisting the support assembly (1) in the stacked state into the working shaft; S2, moving the support assembly (1) to a specified position in the underground tunnel connection passage (3); S3, converting the support assembly (1) to the unfolded state, and the support assembly (1) abuts against and supports the inner wall surface of the underground tunnel connection passage (3).

12. The support method for the underground tunnel connection passage according to claim 11, wherein, Step S2 further includes: converting the support assembly (1) in the stacked state to the deployed state; then hoisting the mobile base (2) into the working shaft, driving the mobile base (2) to pass through the support assembly (1) in the deployed state, fixing the support assembly (1) on the mobile base (2) and converting it to the stacked state; the mobile base (2) moves the support assembly (1) in the stacked state to a specified position in the underground tunnel connection passage (3).

13. The support method for the connecting passage of the underground tunnel according to claim 12, characterized in that, In step S3, the conversion process of the support assembly (1) from the stacked state to the deployed state is as follows: The hook (21) of the mobile base (2) lowers the first arc-shaped support member (11) in the support assembly (1), and presses down the first arc-shaped support member (11) through the suspension rod (22), so that the force transfer support (14) on the first arc-shaped support member (11) abuts against the inner wall surface of the underground tunnel connection passage (3); The rotation driving member (15) drives the second arc-shaped support member (12) to rotate relative to the first arc-shaped support member (11) until the force transfer support (14) on the second arc-shaped support member (12) abuts against the inner wall surface of the underground tunnel connection passage (3), and fixes the first arc-shaped support member (11) and the second arc-shaped support member (12); Another rotation driving member (15) drives the third arc-shaped support member (13) to rotate relative to the first arc-shaped support member (11) until the force transfer support (14) on the third arc-shaped support member (13) abuts against the inner wall surface of the underground tunnel connection passage (3), and fixes the first arc-shaped support member (11) and the third arc-shaped support member (13); The linear driving member (16) on the first arc-shaped support member (11) performs telescopic movement to fix the ends of the second arc-shaped support member (12) and the third arc-shaped support member (13) away from the first arc-shaped support member (11); The hook (21) and the first arc-shaped support member (11) are disengaged, and the mobile base (2) returns to the working shaft to prepare for installing the next support assembly (1).

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