Roundness adjustment device and method

Abstract

This invention provides a roundness adjustment device and method. The roundness adjustment device includes: a moving mechanism located behind the main body of a tunnel boring machine (TBM) and connected to the main beam of the TBM; a roundness adjustment mechanism located behind the main body of the TBM and connected to the moving mechanism, the roundness adjustment mechanism abutting against at least part of the assembled tunnel segments inside the tunnel, and a pipe-feeding channel forming between the bottom of the roundness adjustment mechanism and the inner wall of the tunnel for conveying the tunnel segments; and a driving mechanism connected between the moving mechanism and the roundness adjustment mechanism, the driving mechanism driving the roundness adjustment mechanism to move within the tunnel, so that the roundness adjustment mechanism can press and round two adjacent tunnel segments with radial misalignment after splicing. The roundness adjustment device and method provided by this invention solve the problems of the roundness adjustment device and the splicing machine's operating rhythm not being synchronized and the limited area of ​​the entire circle.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring machine equipment technology, and in particular to a roundness adjustment device and method. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this invention and does not constitute prior art.

[0003] With the popularization of shield tunneling technology, tunnel designs faced by shield tunneling have become more complex, with tunnel routes featuring steep gradients, sharp turns, and continuous bends increasingly appearing. Since shield tunneling machines combine excavation and segment assembly functions, the probability of segment misalignment (i.e., misalignment between two segments radially after splicing) increases further when facing environments with numerous turns. Segment misalignment not only affects the roundness of the tunnel, preventing workers from installing segment bolts, but also leads to uneven stress on the trailer's inclined wheel sets, and errors in box culvert laying and invert casting. When the misaligned tunnel is removed from the shield tail after assembly, the ground pressure and the indentation grout cannot solidify in time, causing segment deformation and displacement of the tunnel's central axis, affecting the tunnel's forming quality. Simultaneously, significant segment deformation and misalignment can lead to uneven stress on subsequent assembled segments, causing stress concentration, which in severe cases can result in segment breakage, water and soil leakage outside the segments, and even surface subsidence.

[0004] To address the aforementioned issues, the existing segment assembly process primarily employs a circular alignment device for circular alignment of the assembled pipe at the shield tail. During this process, operators install the segment bolts. However, there are currently two types of circular alignment devices. One type uses a separate device that is moved by the pipe-assembly machine to perform circular alignment on the top of the pipe. This method is time-consuming and affects the progress of the pipe-assembly machine, leading to an extension of the main beam or a reduction in the tunneling speed of the shield machine to accommodate the device. Furthermore, it can only be used for circular alignment on the top of the pipe, limiting the entire circular area. In the other type, the circular alignment device moves along the main beam. In this method, because the pipe-assembly machine is positioned in front of the device, it still needs to wait for the device to complete its circular alignment before moving to the shield tail to clamp the segments, resulting in relatively low pipe-assembly efficiency.

[0005] It should be noted that the above description of the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of the present invention and facilitating understanding by those skilled in the art. It should not be assumed that the above technical solutions are known to those skilled in the art simply because they have been described in the background section of this invention. Summary of the Invention

[0006] The purpose of this invention is to provide a roundness adjustment device and method that solves the problems of the inability to synchronize the operation rhythm of the roundness adjustment device and the pipe splicing machine, and the limited area of ​​the roundness adjustment.

[0007] The above-mentioned objectives of this invention are mainly achieved by the following technical solutions:

[0008] This invention provides a roundness adjustment device for rounding tunnel segments, the roundness adjustment device comprising:

[0009] A mobile mechanism is located behind the main body of the tunnel boring machine and is connected to the main beam of the main body of the tunnel boring machine.

[0010] A roundness adjustment mechanism is located behind the main body of the tunnel boring machine and connected to the moving mechanism. The roundness adjustment mechanism is used to abut against the tunnel segments after at least part of the splicing inside the tunnel. The bottom of the roundness adjustment mechanism is used to form a pipe delivery channel for conveying the tunnel segments between itself and the inner wall of the tunnel.

[0011] A driving mechanism is connected between the moving mechanism and the roundness adjustment mechanism. The driving mechanism can push the roundness adjustment mechanism to move within the tunnel so that the roundness adjustment mechanism can press and round two adjacent segments that are radially misaligned after splicing.

[0012] In a preferred embodiment, the roundness adjustment mechanism includes:

[0013] A bottom support structure is movably mounted on the lower inner wall of the tunnel, and the bottom of the bottom support structure and the inner wall of the tunnel enclose the pipe delivery channel.

[0014] A central support structure, wherein the central support mechanism is located above and connected to the bottom support structure, and the central support structure has a central support section that can move in the vertical direction;

[0015] A top support structure is located above the middle support structure and connected to the middle support section. The middle support section adjusts the vertical position of the top support structure so that the top support structure can abut against two adjacent segments that are radially misaligned after splicing on the upper or upper-middle inner wall of the tunnel. The two adjacent segments are adjacent along the circumference of the tunnel.

[0016] In a preferred embodiment, the central support structure includes:

[0017] Two intermediate support members are symmetrically arranged on both sides of the bottom support structure, and the bottom of the two intermediate support members are respectively hinged to the bottom support structure;

[0018] Two telescopic members are located above the two central support members, and one end of each telescopic member is hinged to the top of the corresponding central support member, and the other end of each telescopic member is hinged to the top support structure.

[0019] At least a portion of the central support member and the telescopic member connected thereto form the central support section.

[0020] In a preferred embodiment, the central support member is an arc-shaped rod structure, and the curvature of the two central support members is adapted to the curvature of the inner contour of the left and right inner walls of the tunnel, so that the two central support members are hinged to the left and right ends of the top support structure through the two telescopic members to form an arc-shaped whole circular frame that can fit with the spliced ​​pipe segments on the inner wall of the tunnel.

[0021] When the telescopic member is in the extended state, it can push the top support structure to move upward to a position where it abuts against two adjacent segments that are radially misaligned after splicing the upper or middle-upper inner wall of the tunnel.

[0022] And / or, when the telescopic member is in an extended state, the telescopic member can push the central support member to swing radially outward in the direction of the tunnel until it abuts against two adjacent segments of the tunnel that are radially misaligned after splicing the central inner wall of the tunnel.

[0023] In a preferred embodiment, the top support structure includes:

[0024] Two top support members, each having an arc-shaped rod structure, are hinged at one end and connected at the other end to two telescopic members respectively.

[0025] In a preferred embodiment, at least one limiting member is provided on the upper end of each of the two middle support members, and at least one limiting groove is provided on the left and right ends of the top support structure. The limiting member is movably inserted into the limiting groove to limit the relative positional relationship between the top support structure and the middle support members in the axial direction of the tunnel.

[0026] In a preferred embodiment, there are multiple limiting members and multiple limiting grooves. The multiple limiting members are respectively disposed on both sides of the telescopic member, and the multiple limiting grooves are respectively disposed on both sides of the top support structure and the end that is hinged to the telescopic member.

[0027] In a preferred embodiment, the base support structure includes:

[0028] Support frame and at least two base pieces,

[0029] At least two of the base members are disposed at the left and right ends of the bottom of the support frame, and the base members are used to support the support frame against the lower inner wall of the tunnel;

[0030] The support frame, at least two of the base members, and the lower inner wall of the tunnel enclose the pipe delivery channel.

[0031] In a preferred embodiment, the base member is provided with wheels at its bottom to drive the roundness adjustment mechanism to move within the tunnel.

[0032] In a preferred embodiment, the roundness adjustment mechanism further includes:

[0033] Multiple anti-tipping bars are provided, which extend along the axial direction of the tunnel. The multiple anti-tipping bars are respectively connected to the two opposite ends of the top support structure along the tunnel axial direction and the two opposite ends of the middle support structure along the tunnel axial direction.

[0034] In a preferred embodiment, the drive mechanism has a fixed end and a retractable movable end;

[0035] One of the fixed end and the movable end is connected to the moving mechanism, and the other is connected to the roundness adjustment mechanism. The movable end drives the roundness adjustment mechanism to move within the tunnel.

[0036] In a preferred embodiment, the drive mechanism includes:

[0037] At least three telescopic hydraulic cylinders, the cylinder bodies of which are hinged to the moving mechanism, and the cylinder rods of the at least three telescopic hydraulic cylinders are respectively hinged to the top support structure, the bottom support structure and the middle support structure;

[0038] The end of the cylinder body that is connected to the moving mechanism forms the fixed end of the driving mechanism, and the end of the cylinder rod that is connected to the roundness adjustment mechanism forms the movable end.

[0039] In a preferred embodiment, the moving mechanism is connected to the main beam of the tunnel boring machine via a hydraulic cylinder, which is used to adjust the distance between the moving mechanism and the main beam.

[0040] This invention provides a roundness adjustment method, which uses the roundness adjustment device described above for rounding tunnel segments. The roundness adjustment method includes the following steps:

[0041] Step S1: The moving mechanism and the tunnel boring machine move together to the position of the assembled tunnel segment inside the tunnel;

[0042] Step S2: The drive mechanism pushes the roundness adjustment mechanism to move within the tunnel to the two adjacent segments where there is radial misalignment after splicing;

[0043] Step S3: The roundness adjustment mechanism performs a pressing and rounding operation on two adjacent segments that have radial misalignment after splicing, so as to eliminate the radial misalignment between the two adjacent segments;

[0044] Step S4: After completing the rounding operation, the drive mechanism retracts the roundness adjustment mechanism to the moving mechanism.

[0045] In a preferred embodiment, step S3 includes:

[0046] Step S31: The middle support section of the middle support structure pushes the top support structure to move vertically upward until the top support structure abuts against two adjacent segments that are radially misaligned after splicing on the upper or upper middle inner wall of the tunnel.

[0047] Wherein, two adjacent segments are adjacent along the circumference of the tunnel.

[0048] In a preferred embodiment, step S31 includes:

[0049] One end of the telescopic member connected to the top support structure is used to push the top support structure upward to abut against two adjacent segments that are radially misaligned after splicing the upper or middle-upper inner wall of the tunnel, and to perform abutment and complete circle operation.

[0050] Extend the other end of the telescopic member connected to the central support member to push the central support member to swing radially outward in the direction of the tunnel until it abuts against two adjacent segments of the tunnel that are radially misaligned after splicing the inner wall of the middle part of the tunnel, and perform the abutment and rounding operation.

[0051] Compared with the prior art, the technical solution of the present invention has the following characteristics and advantages:

[0052] The roundness adjustment device provided by this invention is located behind the main body of a tunnel boring machine (TBM). This device presses the newly assembled tunnel segments of the TBM into a round shape. The tunnel segments are composed of multiple segments spliced ​​together along the circumference of the tunnel. The moving mechanism of the roundness adjustment device is connected to the main beam of the TBM, allowing it to move along with the TBM during its excavation process. The moving mechanism is located behind the main beam, i.e., behind the tunnel segment assembly machine, enabling it to move within the tunnel formed by the assembled segments. The roundness adjustment mechanism of the device can press the assembled segments within the tunnel into a round shape.

[0053] In this invention, a pipe-feeding channel is formed between the roundness adjustment mechanism and the tunnel wall, allowing tunnel segments to be transported from the rear of the tunnel boring machine (TBM) to the pipe-assembly machine via this channel. This avoids the situation where the pipe-assembly machine cannot perform its assembly operation normally during the roundness adjustment mechanism's rounding process. In this invention, the TBM performs tunneling operations at the front of the tunnel, the pipe-assembly machine performs pipe-assembly operations using tunnel segments transported via the pipe-feeding channel, and the roundness adjustment device performs rounding operations on the assembled tunnel segments. The operations of all three can be performed synchronously, i.e., in a synchronized manner, improving the performance of the TBM main unit. Efficiency; The drive mechanism of the roundness adjustment device, by setting the fixed end on the moving mechanism and connecting the movable end to the roundness adjustment mechanism, enables the movable end of the drive mechanism to push the roundness adjustment mechanism to move along the tunnel axis or other directions within the tunnel. In other words, the roundness adjustment device can flexibly adjust and select which part of the tunnel segment needs to be abutted and rounded according to the current pipe splicing progress and the time required for the complete roundness adjustment, avoiding the situation where the roundness adjustment mechanism must move with the tunnel boring machine's main excavation progress due to the connection between the roundness adjustment mechanism and the moving mechanism alone. Attached Figure Description

[0054] Figure 1 This is a structural diagram of the roundness adjustment device of the present invention before rounding;

[0055] Figure 2 This is a structural diagram of the roundness adjustment device of the present invention during the moving process;

[0056] Figure 3 This is a structural diagram of the roundness adjustment device of the present invention during the rounding process;

[0057] Figure 4 for Figure 1 Enlarged structural diagram;

[0058] Figure 5 for Figure 3 Enlarged structural diagram;

[0059] Figure 6 This is an axial view of the roundness adjustment mechanism of the present invention before it is fully rounded;

[0060] Figure 7 This is an axial view of the roundness adjustment mechanism of the present invention during the rounding process;

[0061] Figure 8 This is an axial view of the tunnel segments before they are fully circular.

[0062] Figure 9 for Figure 8 A magnified view of a portion of position A in the middle;

[0063] Figure 10 This is an axial view of the tunnel segments during the process of forming a complete circle.

[0064] Figure 11 for Figure 10 A magnified view of a portion of position B in the middle;

[0065] Figure 12 This is a structural diagram of the roundness adjustment mechanism of the present invention;

[0066] Figure 13 This is a diagram showing the connection structure between the anti-tipping rod and the roundness adjustment mechanism of the present invention.

[0067] Figure 14 This is a structural diagram showing the connection between the pad and the roundness adjustment mechanism of the present invention;

[0068] Figure 15 This is a schematic diagram of the contact between the gasket and the tube segment of the present invention;

[0069] Figure 16 This is a structural diagram of the telescopic component of the roundness adjustment mechanism of the present invention;

[0070] Figure 17 This is a side view of the roundness adjustment mechanism of the present invention;

[0071] Figure 18 This is a flowchart of the roundness adjustment method of the present invention.

[0072] Explanation of icon numbers:

[0073] 100. Moving mechanism; 110. Hydraulic cylinder;

[0074] 200. Roundness adjustment mechanism; 210. Base support structure; 211. Support frame; 212. Base component; 213. Traveling wheel; 220. Middle support structure; 221. Middle support section; 2211. Middle support component; 2212. Telescopic component; 230. Top support structure; 231. Top support component; 240. Pad plate;

[0075] 300. Drive mechanism; 310. Moving end; 320. Fixed end; 330. Telescopic cylinder; 331. Cylinder body; 332. Cylinder rod;

[0076] 400. Tunnel boring machine main unit; 410. Main beam; 420. Segment;

[0077] 500. Pipe delivery channel;

[0078] 601. Limiting component; 602. Limiting groove;

[0079] 700, Anti-tipping bar; 710, Friction plate. Detailed Implementation

[0080] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0081] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0082] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0083] Implementation Method 1

[0084] like Figures 1 to 3 As shown, the present invention provides a roundness adjustment device for performing rounding operations on tunnel segments 420. The roundness adjustment device includes:

[0085] A moving mechanism 100 is located behind the shield machine host 400 and is connected to the main beam 410 of the shield machine host 400 to move synchronously with the shield machine host 400.

[0086] A roundness adjustment mechanism 200 is located behind the shield machine host 400 and connected to the moving mechanism 100. The roundness adjustment mechanism 200 is used to abut against the tunnel segment 420 after at least part of splicing inside the tunnel. The bottom of the roundness adjustment mechanism 200 is used to form a pipe delivery channel 500 for conveying the tunnel segment 420 between itself and the inner wall of the tunnel.

[0087] A driving mechanism 300 is connected between the moving mechanism (100) and the roundness adjustment mechanism (200). The driving mechanism (300) can push the roundness adjustment mechanism (200) to move within the tunnel so that the roundness adjustment mechanism 200 can press and round two adjacent segments 420 that are radially misaligned after splicing.

[0088] The roundness adjustment device provided by this invention is located behind the tunnel boring machine (TBM) main unit 400. It adjusts the roundness of the tunnel segments (pipe rings) assembled by the TBM's pipe-jointing machine to achieve a perfect roundness. The pipe rings are composed of multiple pipe segments 420 joined end-to-end along the circumference of the tunnel. The moving mechanism 100 of the roundness adjustment device is connected to the main beam 410 of the TBM main unit 400, allowing the moving mechanism 100 to move along with the TBM main unit 400 during its excavation process. The moving mechanism 100 is located behind the main beam 410, that is, behind the tunnel lining machine of the tunnel boring machine, so that the moving mechanism 100 can move within the tunnel formed by the assembled segments 420. The roundness adjustment mechanism 200 of the roundness adjustment device can abut and round the partially assembled segments 420 within the tunnel formed by the segments 420. The roundness adjustment mechanism 200 is connected to the moving mechanism 100, so that the roundness adjustment mechanism 200 can move synchronously with the moving mechanism 100 along with the main tunnel boring machine 400. The roundness adjustment mechanism 200 moves to bring the newly assembled tunnel segment 420 into a complete circle. The pipe delivery channel 500 formed between the roundness adjustment mechanism 200 and the tunnel wall allows the tunnel segment 420 to be transported from the rear of the tunnel boring machine to the pipe-assembly machine via the pipe delivery channel 500, preventing the pipe-assembly machine from being unable to perform its assembly work normally during the roundness adjustment mechanism 200's roundness adjustment process. The drive mechanism 300 of the roundness adjustment device, by setting the fixed end 320 on the moving mechanism 100 and connecting the movable end 310 with the roundness adjustment mechanism 200... The connection allows the movable end 310 of the drive mechanism 300 to push the roundness adjustment mechanism 200 to move along the tunnel axis or other directions within the tunnel. In other words, the roundness adjustment device can flexibly adjust and select which part of the tunnel segment 420 needs to be abutted and rounded according to the current pipe splicing progress and the time required for the complete rounding. This avoids the situation where the roundness adjustment mechanism 200 must move with the tunneling progress of the shield machine host 400 if only the connection between the roundness adjustment mechanism 200 and the moving mechanism 100 is used.

[0089] Specifically, in this embodiment, a pipe ring refers to a circular pipe ring formed by splicing multiple arc-shaped pipe segments 420 along the circumference of the tunnel. Due to ground pressure and the inability of the ground grout to solidify in time, there may be radial misalignment between adjacent assembled pipe segments 420 along the tunnel's circumference. (See reference [link to relevant documentation]). Figure 8 and Figure 9 As shown, a certain segment 420 is closer to the tunnel's axial center than its circumferentially adjacent segments 420. In this embodiment, the abutment is a complete circle, meaning that the roundness adjustment mechanism 200 simultaneously presses against two adjacent segments 420 that are radially misaligned after splicing, moving outward along the tunnel's radial direction. Since the two adjacent segments 420 with radial misalignment are at different positions in the tunnel's radial direction, the segment 420 that is misaligned radially inward is first abutted by the roundness adjustment mechanism 200 and pushed radially outward from the tunnel. (See reference...) Figure 10 and Figure 11 As shown, until two adjacent segments 420 are at the same radial position in the tunnel.

[0090] In this embodiment, the roundness adjustment mechanism 200 is a device capable of moving radially outward along the tunnel. The roundness adjustment mechanism 200 can abut against at least partially spliced ​​segments 420. In this embodiment, the roundness adjustment mechanism 200 can abut against two adjacent segments 420 located on the upper or upper-middle inner wall of the tunnel that are radially misaligned after splicing. In other embodiments, the roundness adjustment mechanism 200 can also abut against two adjacent segments 420 located on the lower-middle inner wall of the tunnel that are radially misaligned after splicing. Compared to existing circular areas (upper inner wall of the tunnel), the present invention provides a larger circular area for misaligned segments 420.

[0091] In this embodiment, the moving mechanism 100 is connected to the rear end of the main beam 410 of the tunnel boring machine host. When the tunnel boring machine host 400 is tunneling, the main beam 410 of the tunnel boring machine host 400 moves forward with the tunneling progress of the tunnel boring machine host 400. The moving mechanism 100 moves with the tunnel boring machine host 400 through its connection with the main beam 410 of the tunnel boring machine host 400. In this embodiment, the moving mechanism 100 is provided with rollers and a moving platform frame. In a specific embodiment, the platform frame of the moving mechanism 100 is used to house the telescopic cylinder 330 of the drive mechanism 300.

[0092] like Figures 4 to 7 , Figure 12 and Figure 17 As shown, in one specific embodiment, the roundness adjustment mechanism 200 includes:

[0093] A bottom support structure 210 is movably mounted on the lower inner wall of the tunnel, and the bottom of the bottom support structure 210 and the inner wall of the tunnel enclose the pipe delivery channel 500.

[0094] The middle support structure 220 is located above and connected to the bottom support structure 210. The middle support structure 220 has a middle support section 221 that can move in the vertical direction.

[0095] A top support structure 230 is located above the middle support structure 220 and connected to the middle support section 221. The middle support section 221 adjusts the vertical position of the top support structure 230 so that the top support structure 230 can abut against two adjacent segments 420 that are radially misaligned after splicing on the upper or upper-middle inner wall of the tunnel. The two adjacent segments 420 are adjacent along the circumference of the tunnel.

[0096] The roundness adjustment device provided in this embodiment has a bottom support structure 210 movably mounted on the lower inner wall of the tunnel, which facilitates the movement of the roundness adjustment mechanism 200 in the tunnel axial direction. In this embodiment, when the roundness adjustment mechanism 200 has not performed rounding, the bottom support structure 210 is dragged by the drive mechanism 300 to the second annular segment 420 of the tunnel exiting the tail shield and mounted on the inner wall of the segment 420 to wait for rounding. When the roundness adjustment mechanism 200 performs rounding, the bottom support structure 210 is pushed by the drive mechanism 300 to the first annular segment 420 of the tunnel exiting the tail shield to perform rounding.

[0097] See also Figure 6 As shown, in this embodiment, the two ends of the bottom support structure 210 are mounted on the lower inner wall of the tunnel to increase the cross-sectional area of ​​the pipe delivery channel 500 formed between the bottom of the bottom support structure 210 and the inner wall of the tunnel, so that pipe segments 420 of different diameters can be transported from the pipe delivery channel 500 to the pipe splicing machine; in this embodiment, refer to Figure 14 , Figure 15 and Figure 17 As shown, pads 240 are provided on the radial outer sides of the middle support structure 220 and the top support structure 230 to fit the tube segment 420, so as to avoid the rigid structure of the middle support structure 220 and the top support structure 230 directly pressing against the tube segment 420 and causing pressure damage to the tube segment 420.

[0098] The roundness adjustment device provided in this embodiment has a middle support structure 220 disposed above the bottom support structure 210 to push the top support structure 230 to move upward. One end of the middle support structure 220 is connected to the bottom support structure 210, and the other end of the middle support structure 220 has a middle support section 221 that can move upward in the vertical direction. In one specific embodiment, the middle support section 221 is a telescopic rod. In another specific embodiment, the middle support section 221 is a swingable hinge. During the swinging process, the middle support section 221 achieves vertical movement by relying on the displacement of the swing path in the vertical direction.

[0099] The roundness adjustment device provided in this embodiment has a top support structure 230 that is generally an arc-shaped rod. The top support structure 230 is connected to the middle support structure 220, so that when the middle support section 221 moves in the vertical direction, it drives the arc-shaped top support structure 230 to abut against two adjacent pipe segments 420 that are radially misaligned after splicing on the upper inner wall or the upper middle inner wall of the tunnel. In this embodiment, the arc of the top support structure 230 is the same as the circumferential arc of the tunnel, which makes it easy to press the two adjacent pipe segments 420 that are radially misaligned after splicing on the upper inner wall or the upper middle inner wall of the tunnel to the same circumferential arc as the tunnel, so as to eliminate the radial misalignment of the two adjacent pipe segments 420.

[0100] like Figure 6 and Figure 7 As shown, in one specific embodiment, the central support structure 220 includes:

[0101] Two intermediate support members 2211 are symmetrically arranged on both sides of the bottom support structure 210, and the bottom of the two intermediate support members 2211 are respectively hinged to the bottom support structure 210;

[0102] Two telescopic members 2212 are located above the two intermediate support members 2211, and one end of each telescopic member 2212 is hinged to the top of the corresponding intermediate support member 2211, and the other end of each telescopic member 2212 is hinged to the top support structure 230.

[0103] At least a portion of the central support member 2211 and the telescopic member 2212 connected thereto form the central support section 221.

[0104] The roundness adjustment device provided in this embodiment has two central support members 2211 symmetrically arranged at both ends of the bottom support structure 210. In this embodiment, the two ends of the bottom support structure 210 are mounted on the lower inner wall of the tunnel, so that when the central support members 2211 apply vertical force, the torque acting on the lower inner wall of the tunnel can be reduced, and the bearing capacity range of the roundness adjustment mechanism 200 can be increased. In this embodiment, the two central support members 2211 are symmetrically arranged at both ends of the bottom support structure 210, which also allows the bottom support structure 210 to evenly distribute the force required to push the top support structure 230 to move vertically, avoiding the risk of shortening the service life of the central support members 2211 due to excessive force. At the same time, the separate arrangement of the two central support members 2211 can also make the top support structure 230 more stable when it is raised or pressed.

[0105] The roundness adjustment device provided in this embodiment has two roundness adjustment devices, with two central support members 2211 respectively located above the two central support members 2211. The two central support members 2211 are respectively hinged to the top support structure 230. That is, the two central support members 2211 and the telescopic member 2212 located on the upper part of the two central support members 2211 together form the central support section 221. In another embodiment, the central support members 2211 and the telescopic member 2212 located on the upper part of the central support members 2211 can also form the central support section 221.

[0106] In one specific embodiment, two telescopic members 2212 are respectively connected to the bottom of the top support structure 230, one end of the middle support member 2211 is connected to the bottom support structure 210, the middle support member 2211 is arranged in the vertical direction, and the telescopic members 2212 push the top support structure 230 to move in the vertical direction.

[0107] In another specific embodiment, the middle support member 2211 can also be a rod with the same arc as the inner wall of the tunnel. The two middle supports 2211 are respectively hinged to the two ends of the bottom support structure 210. When the two telescopic members 2212 push the top support structure 230 synchronously along the circumference of the tunnel, the pushing force of the two telescopic members 2212 can be converted into a pushing force in the vertical direction.

[0108] like Figure 6 and Figure 7 As shown, in one specific embodiment, the middle support member 2211 is an arc-shaped rod structure. The arc of the two middle support members 2211 is adapted to the arc of the inner contour of the left and right inner walls of the tunnel, so that the two middle support members 2211 are hinged to the left and right ends of the top support structure 230 through the two telescopic members 2212 to form an arc-shaped whole circular frame that can fit with the spliced ​​pipe segment 420 on the inner wall of the tunnel.

[0109] When the telescopic member 2212 is in the extended state, the telescopic member 2212 can push the top support structure 230 to move upward to a position where it abuts against two adjacent segments 420 that are radially misaligned after splicing the upper inner wall or the upper middle inner wall of the tunnel.

[0110] And / or, when the telescopic member 2212 is in an extended state, the telescopic member 2212 can push the central support member 2211 to swing radially outward in the direction of the tunnel to abut against two adjacent segments 420 that are radially misaligned after splicing the inner wall of the middle part of the tunnel.

[0111] The roundness adjustment device provided in this embodiment allows the curvature of the top support structure 230 to be adapted to the curvature of the inner contour of the upper inner wall of the tunnel. Under the elongation and pushing action of the two arc-shaped rod-shaped middle support members 2211 and the two telescopic members 2212, the pushing force of the two telescopic members 2212 can be converted into a pushing force in the vertical direction. Under the pushing force, the top support structure 230 moves to the position where two adjacent segments 420 with radial misalignment after splicing the upper inner wall or the upper middle inner wall of the tunnel abut each other. By further elongating the telescopic members 2212, the abutment pressure of the top support structure 230 on the two adjacent segments 420 with radial misalignment after splicing the upper inner wall or the upper middle inner wall of the tunnel can be increased.

[0112] In this embodiment, the middle support member 2211 is hinged to the left and right ends of the bottom support structure 210, so that it can swing radially outward to the middle inner wall of the tunnel under the pushing action of the telescopic member 2212 until it abuts against the two adjacent segments 420 that are radially misaligned after splicing the left and right inner walls of the tunnel. By further extending the telescopic member 2212, the resistance of the middle support member 2211 to the two adjacent segments 420 that are radially misaligned after splicing the left and right inner walls of the tunnel can be increased. Compared with the existing whole circular area (upper inner wall of the tunnel), the present invention has a larger whole circular area for the misaligned segments 420.

[0113] In this embodiment, the curvature of the central support member 2211 is adapted to the curvature of the inner contour of the left and right inner walls of the tunnel, respectively. That is, the two central support members 2211 are hinged to the left and right ends of the top support structure 230 through the two telescopic members 2212 to form an arc-shaped frame that can fit with the spliced ​​tube segment 420 on the inner wall of the tunnel. In other words, the two central support members 2211 and the top support structure 230 can simultaneously perform the pressing and rounding operation on the left and right inner walls in the middle of the tunnel, the upper middle inner wall of the tunnel, and the upper inner wall of the tunnel, and can ensure that the inner wall of this part can be the same as the curvature of the tunnel.

[0114] In a specific embodiment, the roundness adjustment device provided in this embodiment allows the top support structure 230 to move upwards to a position where two adjacent segments 420 with radial misalignment after splicing the upper or upper-middle inner wall of the tunnel abut against each other when the telescopic member 2212 is extended. Simultaneously, when the telescopic member 2212 is extended, it can push the middle support member 2211 to swing radially outwards from the tunnel to a position where it abuts against the two adjacent segments 420 with radial misalignment after splicing the middle inner wall of the tunnel. By further increasing the extension of the telescopic member 2212, the resistance pressure of the middle support member 2211 against the middle inner wall of the tunnel and the resistance pressure of the top support structure 230 against the two adjacent segments 420 with radial misalignment after splicing the upper or upper-middle inner wall of the tunnel can be increased simultaneously.

[0115] In another specific embodiment of the roundness adjustment device provided in this embodiment, when the telescopic member 2212 is extended, the top support structure 230 first moves upward to the position where two adjacent pipe segments 420 with radial misalignment after splicing the upper inner wall or the upper middle inner wall of the tunnel abuts, and then further extends the telescopic member 2212, which can increase the pressure of the top support structure 230 against the two adjacent pipe segments 420 with radial misalignment after splicing the upper inner wall or the upper middle inner wall of the tunnel; on this basis, the telescopic member 2212 is further extended, and the telescopic member 2212 can push the middle support member 2211 to swing in the radially outward direction of the tunnel to the position where it abuts against the two adjacent pipe segments 420 with radial misalignment after splicing the middle inner wall of the tunnel. Finally, by further increasing the extension of the telescopic member 2212, the pressure of the middle support member 2211 against the middle inner wall of the tunnel can be increased.

[0116] like Figure 6 and Figure 7 As shown, in one specific embodiment, the top support structure 230 includes:

[0117] Two top support members 231, each having an arc-shaped rod structure, with one end of each top support member 231 hinged together and the other end of each top support member 231 connected to two telescopic members 2212 respectively.

[0118] The roundness adjustment device provided in this embodiment sets the top support structure 230 as two hinged arc-shaped rod-shaped top support members 231, with the other ends of the two top support members 231 respectively connected to the two telescopic members 2212. This allows the two top support members 231 of the top support structure 230 to move upward as a whole when the telescopic members 2212 extend. The hinged joint of the two top support members 231 first abuts against the inner wall of the tunnel. As the middle support section 221 continues to push the two top support members 231 upward, the two top support members 231 swing radially outward from the abutment position to abut against two adjacent segments 420 that are radially misaligned after splicing the upper or upper middle inner wall of the tunnel. At the same time, the extension of the telescopic members 2212 can also drive the two middle support members. 2211 The radial outward swing of the top support structure 230 abuts against the two adjacent segments 420 that are radially misaligned after splicing the inner wall of the middle section of the tunnel; that is, the top support structure 230 changes from vertically pushing and abutting to swinging upward abutting, so that the top support structure 230 and the middle support structure 220 can simultaneously press against the left and right inner walls of the middle section of the tunnel, the upper inner wall of the middle section of the tunnel, and the upper inner wall of the tunnel, making the pressing effect more uniform and the pressing process more synchronous; avoiding the situation where the top support structure 230 presses against the upper inner wall first, and then the middle support structure 220 presses against the left and right inner walls of the middle section of the tunnel, which would cause the adjacent misaligned segments 420 of the upper inner wall to move and the segments 420 of the tunnel circumferentially deform, affecting the pressing quality.

[0119] like Figure 16 As shown, in one specific embodiment, the upper ends of the two middle support members 2211 are respectively provided with at least one limiting member 601 protruding upwards, and the left and right ends of the top support structure 230 are respectively provided with at least one limiting groove 602. The limiting member 601 is movably inserted into the limiting groove 602 to limit the relative positional relationship between the top support structure 230 and the middle support member 2211 in the axial direction of the tunnel.

[0120] The roundness adjustment device provided in this embodiment has a limiting member 601 at the upper end of the middle support section 221 that is generally a protrusion. The limiting member 601 is formed to protrude upward along the axis of the middle support section 2211. In a specific embodiment, the middle support section 2211 is an arc-shaped rod structure, and the limiting member 601 is also an arc-shaped rod structure. In this embodiment, the limiting groove 602 is generally a groove that is recessed inward along the axial direction of the top support structure 230. In a specific embodiment, the top support structure 230 is an arc-shaped rod structure, and the limiting groove 602 is also an arc-shaped groove.

[0121] Specifically, in this embodiment, the limiting member 601 is movably inserted into the limiting groove 602. That is, during the process of the top support structure 230 moving vertically upward relative to the middle support member 2211, the telescopic member 2212 is prevented from being affected by the gravity of the top support structure 230, which would cause the telescopic member 2212 to deform and bend, and thus cause the top support structure 230 and the middle support member 2211 to deform and misalign in the tunnel axial direction. In this embodiment, the length of the limiting member 601 and the limiting groove 602 is set to be greater than the extension stroke of the telescopic member 2212.

[0122] like Figure 16 As shown, in one specific embodiment, there are multiple limiting members and multiple limiting grooves 602. The multiple limiting members are respectively disposed on both sides of the telescopic member 2212, and the multiple limiting grooves 602 are respectively disposed on both sides of the top support structure 230 and the end that is hinged to the telescopic member 2212.

[0123] The roundness adjustment device provided in this embodiment, by setting multiple matching limiting members and limiting grooves 602, can more firmly restrict the relative positional relationship between the top support structure 230 and the middle support member 2211 in the axial direction of the tunnel. That is, it restricts the top support structure 230 and the middle support member 2211 from being in the same position in the axial direction of the tunnel, and avoids the top support structure 230 and the middle support member 2211 from being misaligned in the axial direction of the tunnel. At the same time, the multiple limiting members are respectively set on both sides of the telescopic member 2212, and the multiple limiting grooves 602 are respectively set on both sides of the end of the top support structure 230 that is hinged to the telescopic member 2212, which can prevent the limiting members and limiting grooves 602 from interfering with the telescopic member 2212's telescopic operation.

[0124] like Figure 12 As shown, in one specific embodiment, the bottom support structure 210 includes:

[0125] Support frame 211 and at least two base pieces 212,

[0126] At least two of the base members 212 are disposed at the left and right ends of the bottom of the support frame 211, and the base members 212 are used to support the support frame 211 on the lower inner wall of the tunnel;

[0127] The support frame 211, at least two of the base members 212, and the lower inner wall of the tunnel enclose the pipe delivery channel 500.

[0128] The roundness adjustment device provided in this embodiment includes a support frame 211 and a base member 212. The support frame 211 facilitates connection to the intermediate support member 2211 and provides a platform or foundation for the intermediate support structure 220 and the top support structure 230 to apply a force to the tunnel segments to achieve a rounded shape. The base member 212 is used to stably mount the support frame 211 against the lower inner wall of the tunnel. In this embodiment, at least two base members 212 are located at the left and right ends of the bottom of the support frame 211 to increase the axial cross-sectional area of ​​the pipe delivery channel 500 and prevent the base members 212 from encroaching on the cross-sectional area of ​​the pipe delivery channel 500, thus affecting the normal pipe delivery of the pipe splicing machine. The two ends of the support frame 211 abut against the inner wall of the tunnel, allowing the arc-shaped intermediate support member 2211 to fully abut and conform to the middle inner wall of the tunnel, increasing the abutment range of the intermediate support member 2211 and thereby increasing the roundness adjustment mechanism 200's circular area.

[0129] like Figure 6 and Figure 7 As shown, in one specific embodiment, the bottom of the base member 212 is provided with a traveling wheel 213 to drive the roundness adjustment mechanism 200 to move in the tunnel.

[0130] The roundness adjustment device provided in this embodiment facilitates the movement of the base support structure 210 within the tunnel by providing a traveling wheel 213 at the bottom of the base member 212. In other words, the roundness adjustment mechanism 200 can move axially in the tunnel via the drive mechanism 300 or the moving mechanism 100, avoiding the need for a dedicated transfer device to lift and move the roundness adjustment mechanism 200.

[0131] like Figures 1 to 5 , Figure 13 and Figure 17 As shown, in one specific embodiment, the roundness adjustment mechanism 200 further includes:

[0132] Multiple anti-tipping bars 700 are provided, which extend along the axial direction of the tunnel. The multiple anti-tipping bars 700 are respectively connected to the two opposite ends of the top support structure 230 along the tunnel axial direction and the two opposite ends of the middle support structure 220 along the tunnel axial direction.

[0133] The roundness adjustment device provided in this embodiment has the following drawbacks: Since the top support structure 230 and the middle support structure 220 are arc-shaped members, and due to the influence of the tunnel construction environment, the thickness-to-radius ratio of the top support structure 230 or the middle support structure 220 is relatively small, making it easy for the top support structure 230 or the middle support structure 220 to tilt within the tunnel. To prevent the top support structure 230 or the middle support structure 220 from tilting, please refer to the following... Figure 4 and Figure 17As shown, multiple anti-tipping bars 700 are provided on the two opposite ends of the top support structure 230 along the tunnel axis and on the two opposite ends of the middle support structure 220 along the tunnel axis. This means that when the top support structure 230 or the middle support structure 220 tilts, it can be secured to the tunnel wall by the anti-tipping bars 700, preventing it from falling and affecting equipment and personnel safety. In this embodiment, the end of the anti-tipping bar 700 is provided with a friction plate 710, which is made of a flexible non-metallic material. This is used to prevent the rigid structure of the anti-tipping bar 700 from directly contacting the tunnel segment 420 and causing scratch damage.

[0134] like Figure 4 and Figure 5 As shown, in one specific embodiment, the drive mechanism 300 has a fixed end 320 and a retractable movable end 310; one of the fixed end 320 and the movable end 310 is connected to the moving mechanism 100, and the other is connected to the roundness adjustment mechanism 200, and the roundness adjustment mechanism 200 is pushed to move in the tunnel through the movable end 310.

[0135] The roundness adjustment device provided in this embodiment provides a fixed end 320 and a movable end 310 to provide a thrust along the axial direction of the tunnel to the roundness adjustment mechanism 200. The movable end 310 is telescopic, that is, the movable end 310 can push the roundness adjustment mechanism 200 to move along the axial direction of the tunnel in the tunnel, so as to move the roundness adjustment mechanism 200 to the position of the segment that needs to be round as needed. In this embodiment, the drive mechanism 300 can be a telescopic hydraulic cylinder 330. In another embodiment, the drive mechanism 300 can also be a pneumatic or electromagnetic push rod, etc. The specific device of the drive mechanism 300 is not limited. In this embodiment, when the roundness adjustment mechanism 200 has not performed the rounding, the top support structure 230, the bottom support structure 210 and the middle support structure 220 are dragged to the second ring segment 420 of the tunnel exit tail shield through the movable end 310 of the drive mechanism 300, in order to wait for the rounding to be performed. When the roundness adjustment mechanism 200 performs the rounding, the top support structure 230, the bottom support structure 210 and the middle support structure 220 are pushed to the first ring segment 420 of the tunnel exit tail shield through the drive mechanism 300, in order to perform the rounding.

[0136] like Figure 4 and Figure 5 As shown, in one specific embodiment, the drive mechanism 300 includes:

[0137] At least three telescopic cylinders 330, the cylinder body 331 of the telescopic cylinder 330 is hinged to the moving mechanism 100, and the cylinder rod 332 of the at least three telescopic cylinders 330 is respectively hinged to the top support structure 230, the bottom support structure 210 and the middle support structure 220;

[0138] The end of the cylinder 331 that is connected to the moving mechanism 100 forms the fixed end 320 of the driving mechanism 300, and the end of the cylinder rod 332 that is connected to the roundness adjustment mechanism 200 forms the movable end 310.

[0139] The roundness adjustment device provided in this embodiment connects the moving mechanism 100 to the top support structure 230, the moving mechanism 100 to the bottom support structure 210, and the moving mechanism 100 to the middle support structure 220 via telescopic cylinders 330. This allows for dynamic adjustment of the roundness adjustment mechanism 200's position within the tunnel according to the desired roundness. In this embodiment, the cylinder body 331 of the telescopic cylinder 330 is hinged to the moving mechanism 100, and the cylinder rod 332 is hinged to the top support structure 230, the bottom support structure 210, and the middle support structure 220, respectively. This allows for adjustment of the telescopic cylinder 330's tilt angle relative to the horizontal as the roundness adjustment mechanism 200 moves. Based on the extended length of the telescopic cylinder 330, misalignments between two adjacent ring segments 420 along the tunnel axis can also be rounded, preventing offset of the central axis between rings and ensuring the screws on the segments 420 are tightened.

[0140] In this embodiment, when the roundness adjustment mechanism 200 has not performed the rounding operation, the top support structure 230, the bottom support structure 210, and the middle support structure 220 are dragged to the second ring segment 420 of the tunnel exit tail shield by the telescopic cylinder 330 of the drive mechanism 300, in order to wait for the rounding operation. When the roundness adjustment mechanism 200 performs the rounding operation, the top support structure 230, the bottom support structure 210, and the middle support structure 220 are pushed to the first ring segment 420 of the tunnel exit tail shield by the drive mechanism 300, in order to perform the rounding operation.

[0141] like Figure 4 and Figure 5 As shown, in one specific embodiment, the moving mechanism 100 is connected to the main beam 410 of the tunnel boring machine host 400 via a hydraulic cylinder 110, which is used to adjust the distance between the moving mechanism 100 and the main beam 410.

[0142] The roundness adjustment device provided in this embodiment, by setting a hydraulic cylinder 110, can adjust the distance between the moving mechanism 100 and the main beam 410. That is, when the tunnel boring machine host 400 is excavating forward and the main beam 410 also needs to move forward, if the roundness adjustment mechanism 200 has not yet completed the rounding process, the hydraulic cylinder 110 can increase the distance between the moving mechanism 100 and the main beam 410, so that the main beam 410 will not drag the moving mechanism 100 to move forward directly, avoiding the situation where the roundness adjustment mechanism 200 rubs against the tunnel segment 420 or the roundness adjustment mechanism 200 is dragged and deformed by the main beam 410, and also ensuring that the roundness adjustment mechanism 200... The operation rhythm of the roundness adjustment device is independent of that of the tunnel boring machine (TBM) host 400, improving the overall efficiency of the roundness adjustment device and solving the problem that the operation rhythm of the roundness adjustment device and the pipe splicing machine cannot be synchronized. At the same time, if the TBM host 400 is not moving forward and the pipe segment 420 assembled by the pipe splicing machine is farther away than the roundness adjustment mechanism 200, making it impossible for the drive mechanism 300 to push the roundness adjustment mechanism 200 to the pipe segment 420 to be rounded, the hydraulic cylinder 110 can be used to reduce the distance between the moving mechanism 100 and the main beam 410, so that the roundness adjustment mechanism 200 can reach the pipe segment 420 to be rounded, thus improving the overall efficiency of the roundness adjustment device.

[0143] Implementation Method 2

[0144] like Figure 18 As shown, the present invention provides a roundness adjustment method, which uses the roundness adjustment device described above to perform rounding operations on the tunnel segments 420. The roundness adjustment method includes the following steps:

[0145] Step S1: The moving mechanism 100 and the tunnel boring machine host 400 move together to the position of the assembled tunnel segment 420 inside the tunnel;

[0146] Step S2: The drive mechanism 300 pushes the roundness adjustment mechanism 200 to move within the tunnel to the two adjacent segments 420 that have radial misalignment after splicing;

[0147] Step S3: The roundness adjustment mechanism 200 performs a pressing and rounding operation on two adjacent segments 420 that have radial misalignment after splicing, so as to eliminate the radial misalignment between the two adjacent segments 420;

[0148] Step S4: After completing the rounding operation, the drive mechanism 300 retracts the roundness adjustment mechanism 200 to the moving mechanism 100.

[0149] The roundness adjustment method provided by this invention can be referred to in conjunction with the following: Figures 5 to 7As shown, the moving mechanism 100 can move along with the tunnel boring machine 400 during its excavation. That is, the moving mechanism 100 can move inside the assembled tunnel segment 420, facilitating the roundness adjustment device's rounding operation of the assembled tunnel segment 420 within the tunnel. The driving mechanism 300 can push the roundness adjustment mechanism 200 to move along the tunnel's axial direction or other directions within the tunnel. In other words, the roundness adjustment device can flexibly adjust and select which part of the tunnel segment 420 needs to be aligned and rounded by the roundness adjustment mechanism 200 based on the current tunnel assembly progress and the time required for rounding. The tunnel simultaneously presses against two adjacent segments 420 that are radially misaligned after splicing, moving radially outward. Since the two adjacent segments 420 with radial misalignment are in different radial positions, the misaligned segment 420 that is radially inward is first pressed against by the roundness adjustment mechanism 200 and pushed radially outward from the tunnel until the two adjacent segments 420 are in the same radial position in the tunnel, thereby eliminating the radial misalignment between the two adjacent segments 420. After the rounding operation is completed, the roundness adjustment mechanism 200 can be retracted to the moving mechanism 100 by the drive mechanism 300 until the next rounding operation.

[0150] In one specific embodiment, step S3 includes:

[0151] Step S31: The middle support section 221 of the middle support structure 220 pushes the top support structure 230 to move vertically upward until the top support structure 230 abuts against two adjacent segments 420 that are radially misaligned after splicing on the upper inner wall or the upper middle inner wall of the tunnel.

[0152] Wherein, two adjacent segments 420 are adjacent along the circumference of the tunnel.

[0153] In one specific embodiment of the roundness adjustment method provided by the present invention, the middle support section 221 is a telescopic rod. During the rounding operation, the middle support section 221 of the middle support structure 220 extends and retracts vertically to push the top support structure 230 to move vertically upward. In another specific embodiment, the middle support section 221 is a hinged member that can swing. During the rounding operation, the middle support section 221 moves vertically by relying on the displacement of the swing path in the vertical direction during the swinging process, thereby driving the top support structure 230 to move vertically upward. During the contact process of the top support structure 230 moving vertically upward, the two adjacent segments 420 are segments 420 that are adjacent along the circumference of the tunnel.

[0154] In one specific embodiment, step S31 includes:

[0155] Step S311: The end of the extension telescopic member 2212 connected to the top support structure 230 is used to push the top support structure 230 upward to abut against two adjacent segments 420 that are radially misaligned after splicing the upper or middle-upper inner wall of the tunnel, and to perform the abutment and complete circle operation.

[0156] Step S312: Extend the other end of the telescopic member 2212 connected to the central support member 2211 to push the central support member 2211 to swing radially outward in the direction of the tunnel to abut against the two adjacent segments 420 that are radially misaligned after splicing the inner wall of the middle part of the tunnel, and perform the abutment and rounding operation.

[0157] In a specific embodiment of the roundness adjustment method provided by the present invention, that is, in step S311, with one end of the telescopic member 2212 extended, the top support structure 230 first moves upward to the position where two adjacent segments 420 with radial misalignment after splicing the upper or upper middle inner wall of the tunnel abuts; further extending this end of the telescopic member 2212 can increase the pressure of the top support structure 230 against the two adjacent segments 420 with radial misalignment after splicing the upper or upper middle inner wall of the tunnel; based on this, that is, in step S312, extending the other end of the telescopic member 2212 can push the middle support member 2211 to swing radially outward in the direction of the tunnel to the position where it abuts against the two adjacent segments 420 with radial misalignment after splicing the middle inner wall of the tunnel; finally, by further increasing the extension of the telescopic member 2212, the pressure of the middle support member 2211 against the middle inner wall of the tunnel can be increased.

[0158] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A roundness adjustment device for performing rounding operations on tunnel segments (420) within a tunnel, characterized in that, The roundness adjustment device includes: A moving mechanism (100) is located behind the main shield machine (400) and is connected to the main beam (410) of the main shield machine (400). A roundness adjustment mechanism (200) is located behind the shield machine host (400) and connected to the moving mechanism (100). The roundness adjustment mechanism (200) is used to abut against the segment (420) after at least part of splicing in the tunnel. The bottom of the roundness adjustment mechanism (200) is used to form a pipe delivery channel (500) between itself and the inner wall of the tunnel for transporting the segment (420). The roundness adjustment mechanism (200) includes: A bottom support structure (210) is movably mounted on the lower inner wall of the tunnel; The bottom support structure (210) includes: Support frame (211) and at least two base pieces (212). At least two of the base members (212) are disposed at the left and right ends of the bottom of the support frame (211), and the base members (212) are used to support the support frame (211) on the lower inner wall of the tunnel; The support frame (211), at least two of the base members (212), and the lower inner wall of the tunnel enclose the pipe delivery channel (500). A middle support structure (220) is located above and connected to the bottom support structure (210), and the middle support structure (220) has a middle support section (221) that can move in the vertical direction. A top support structure (230) is located above the middle support structure (220) and connected to the middle support section (221). The middle support section (221) adjusts the vertical position of the top support structure (230) so that the top support structure (230) can abut against two adjacent segments (420) that are radially misaligned after splicing on the upper or upper middle inner wall of the tunnel. The two adjacent segments (420) are adjacent along the circumference of the tunnel. A driving mechanism (300) is connected between the moving mechanism (100) and the roundness adjustment mechanism (200). The driving mechanism (300) can push the roundness adjustment mechanism (200) to move within the tunnel so that the roundness adjustment mechanism (200) can press and round two adjacent segments (420) that are radially misaligned after splicing. The tunnel boring machine performs tunneling operations in front of the tunnel, the pipe splicing machine performs pipe splicing operations by conveying the pipe segments (420) through the pipe delivery channel, and the roundness adjustment device (200) performs abutment and rounding operations on the pipe segments (420) assembled by the pipe splicing machine. The three operations are carried out simultaneously.

2. The roundness adjustment device according to claim 1, characterized in that, The central support structure (220) includes: Two intermediate support members (2211) are symmetrically arranged on both sides of the bottom support structure (210), and the bottom of the two intermediate support members (2211) are respectively hinged to the bottom support structure (210); Two telescopic members (2212) are located above the two intermediate supports (2211), and one end of each telescopic member (2212) is hinged to the top of the corresponding intermediate support (2211), and the other end of each telescopic member (2212) is hinged to the top support structure (230). At least a portion of the central support member (2211) and the telescopic member (2212) connected thereto form the central support section (221).

3. The roundness adjustment device according to claim 2, characterized in that, The middle support (2211) is an arc-shaped rod structure. The arc of the two middle support (2211) is adapted to the arc of the inner contour of the left and right inner walls of the tunnel, so that the two middle support (2211) are hinged to the left and right ends of the top support structure (230) through the two telescopic members (2212) to form an arc-shaped whole circle frame that can fit with the spliced ​​pipe segment (420) on the inner wall of the tunnel. When the telescopic member (2212) is in an extended state, the telescopic member (2212) can push the top support structure (230) to move upward to a position where it abuts against two adjacent segments (420) that are radially misaligned after splicing the upper inner wall or the upper middle inner wall of the tunnel. And / or, when the telescopic member (2212) is in an extended state, the telescopic member (2212) can push the central support member (2211) to swing radially outward in the direction of the tunnel to abut against two adjacent segments (420) that are radially misaligned after splicing the inner wall of the middle part of the tunnel.

4. The roundness adjustment device according to claim 2, characterized in that, The top support structure (230) includes: Two top support members (231) are arc-shaped rod structures. One end of the two top support members (231) is hinged together, and the other end of the two top support members (231) is connected to the two telescopic members (2212) respectively.

5. The roundness adjustment device according to claim 3, characterized in that, The upper ends of the two middle support members (2211) are respectively provided with at least one limiting member (601) protruding upwards. The left and right ends of the top support structure (230) are respectively provided with at least one limiting groove (602). The limiting member (601) is movably inserted into the limiting groove (602) to limit the relative positional relationship between the top support structure (230) and the middle support member (2211) in the axial direction of the tunnel.

6. The roundness adjustment device according to claim 5, characterized in that, There are multiple limiting members (601) and multiple limiting grooves (602). The multiple limiting members (601) are respectively disposed on both sides of the telescopic member (2212), and the multiple limiting grooves (602) are respectively disposed on both sides of the top support structure (230) and the end that is hinged to the telescopic member (2212).

7. The roundness adjustment device according to claim 1, characterized in that, The base component (212) is provided with a walking wheel (213) at its bottom to drive the roundness adjustment mechanism (200) to move within the tunnel.

8. The roundness adjustment device according to claim 1, characterized in that, The roundness adjustment mechanism (200) further includes: Multiple anti-tipping bars (700) are provided, which extend along the axial direction of the tunnel. The multiple anti-tipping bars (700) are respectively connected to the two opposite ends of the top support structure (230) along the axial direction of the tunnel and the two opposite ends of the middle support structure (220) along the axial direction of the tunnel.

9. The roundness adjustment device according to claim 1, characterized in that, The drive mechanism (300) has a fixed end (320) and a retractable movable end (310). One of the fixed end (320) and the movable end (310) is connected to the moving mechanism (100), and the other is connected to the roundness adjustment mechanism (200). The roundness adjustment mechanism (200) is moved within the tunnel by the movable end (310).

10. The roundness adjustment device according to claim 9, characterized in that, The drive mechanism (300) includes: At least three telescopic cylinders (330) are provided, the cylinder body (331) of which is hinged to the moving mechanism (100), and the cylinder rods (332) of the at least three telescopic cylinders (330) are respectively hinged to the top support structure (230), the bottom support structure (210) and the middle support structure (220); The end of the cylinder (331) connected to the moving mechanism (100) forms the fixed end (320) of the driving mechanism (300), and the end of the cylinder rod (332) connected to the roundness adjustment mechanism (200) forms the movable end (310).

11. The roundness adjustment device according to claim 1, characterized in that, The moving mechanism (100) is connected to the main beam (410) of the tunnel boring machine host (400) via a hydraulic cylinder, which is used to adjust the distance between the moving mechanism (100) and the main beam (410).

12. A roundness adjustment method, employing the roundness adjustment device according to any one of claims 1 to 11, for performing rounding operations on tunnel segments (420), characterized in that, The roundness adjustment method includes the following steps: Step S1: The moving mechanism (100) and the tunnel boring machine host (400) move together to the position of the segment (420) that has been spliced ​​in the tunnel; Step S2: The drive mechanism (300) pushes the roundness adjustment mechanism (200) to move within the tunnel to the two adjacent segments (420) that have radial misalignment after splicing; Step S3: The roundness adjustment mechanism (200) performs a pressing and rounding operation on two adjacent segments (420) that have radial misalignment after splicing, so as to eliminate the radial misalignment between the two adjacent segments (420); Step S4: After completing the rounding operation, the drive mechanism (300) retracts the roundness adjustment mechanism (200) to the moving mechanism (100).

13. The roundness adjustment method according to claim 12, characterized in that, Step S3 includes: Step S31: The middle support section (221) of the middle support structure (220) pushes the top support structure (230) to move vertically upward until the top support structure (230) abuts against two adjacent segments (420) that are radially misaligned after splicing on the upper inner wall or the upper middle inner wall of the tunnel. Among them, two adjacent segments (420) are adjacent along the circumference of the tunnel.

14. The roundness adjustment method according to claim 13, characterized in that, Step S31 includes: One end of the extension telescopic component (2212) connected to the top support structure (230) is used to push the top support structure (230) upward to a position where it abuts against two adjacent segments (420) that are radially misaligned after splicing the upper or middle-upper inner wall of the tunnel, and to perform abutment and complete circle operation. Extend the other end of the telescopic member (2212) connected to the central support member (2211) to push the central support member (2211) to swing in the radial outward direction of the tunnel to abut against the two adjacent segments (420) that are radially misaligned after splicing the inner wall of the middle part of the tunnel, and perform the abutment and complete circle operation.

Images