Roundness adjusting device and method

Abstract

The invention provides a roundness adjusting device and method. The roundness adjusting device comprises a moving mechanism located behind a main machine of a shield tunneling machine, and the moving mechanism is connected with a main beam of the main machine of the shield tunneling machine; the roundness adjusting mechanism is located behind the shield tunneling machine main machine and connected with the moving mechanism, the roundness adjusting mechanism abuts against at least part of the spliced pipe pieces in the tunnel, and a pipe conveying channel for conveying the pipe pieces is formed between the bottom of the roundness adjusting mechanism and the inner wall of the tunnel; the driving mechanism is connected between the moving mechanism and the roundness adjusting mechanism, and the driving mechanism can push the roundness adjusting mechanism to move in the tunnel so that the roundness adjusting mechanism can abut against and round two adjacent segments which are staggered in the radial direction after splicing. According to the roundness adjusting device and method, the problems that the roundness adjusting device and the pipe splicing machine cannot be operated synchronously, and the whole circle area is limited are solved.

Description

Technical Field

[0001] The invention relates to the technical field of shield machine equipment, and in particular to a roundness adjustment device and method. Background Art

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

[0003] With the popularization of shield construction technology, the tunnel design faced by shield construction has become more complex, and tunnel routes with characteristics such as large slopes, small turns, and continuous turns continue to appear. Since the shield machine includes the functions of excavation and segment assembly, the probability of segment misalignment (i.e., after the segments are spliced, there is a misalignment between the two segments in the radial direction of the tunnel) during the segment assembly process is further increased in the face of many turns. Segment misalignment not only affects the roundness of the pipeline, resulting in the inability of construction personnel to complete the installation of segment bolts, but also causes uneven force on the trailer inclined wheel pair, errors in the laying of box culverts and the pouring of inverts. When the misaligned pipeline is pulled out of the shield tail after assembly, due to the formation pressure and the formation slurry cannot solidify in time, the segment will be deformed and the central axis of the tunnel will be offset, affecting the forming quality of the tunnel; at the same time, the large deformation and misalignment of the segment will cause uneven force on the subsequent assembled segments, resulting in stress concentration, which will cause segment damage, water and soil seepage outside the segment, and even cause surface collapse in severe cases.

[0004] In view of the above problems, in the existing segment assembly process, a whole-circle device is mainly used to perform whole-circle operations on the assembled pipes at the shield tail. During the whole-circle operation, the operator completes the installation of the segment bolts. However, there are currently two structures of the whole-circle device. One is to use a separate whole-circle device, which is moved by a pipe assembly machine to perform whole-circle operations on the top of the pipe. The whole-circle operation using this device takes a long time and affects the progress of the pipe assembly machine, resulting in the extension of the shield machine's main beam or the reduction of the shield machine's excavation speed to cooperate with the whole-circle device, and can only be used for whole-circle operations on the top of the pipe, and the whole-circle area is limited. In the other structure, the whole-circle device is a structure that walks on the main beam. In this device, since the pipe assembly machine is located in the front position of the whole-circle device, the pipe assembly machine still needs to wait for the whole-circle device to complete the whole-circle operation before it can move to the shield tail to clamp the pipe segments, resulting in the pipe assembly efficiency of the pipe assembly machine is still low.

[0005] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present invention and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the present invention. Summary of the invention

[0006] The purpose of the present invention is to provide a roundness adjustment device and method, which solves the problem that the operation rhythm of the rounding device and the pipe splicing machine cannot be synchronized and the rounding area is limited.

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

[0008] The present invention provides a roundness adjustment device, which is used to perform a rounding operation on a pipe segment in a tunnel. The roundness adjustment device comprises:

[0009] A moving mechanism, wherein the moving mechanism is located behind the shield machine mainframe and is connected to the main beam of the shield machine mainframe;

[0010] A roundness adjustment mechanism, the roundness adjustment mechanism is located at the rear of the shield machine mainframe and connected to the moving mechanism, the roundness adjustment mechanism is used to abut against the at least partially spliced ​​segments in the tunnel, and the bottom of the roundness adjustment mechanism is used to form a pipe delivery channel for delivering the segments between the bottom and the inner wall of the tunnel;

[0011] A driving mechanism is connected between the moving mechanism and the roundness adjustment mechanism, and the driving mechanism can push the roundness adjustment mechanism to move in the tunnel so that the roundness adjustment mechanism can press two adjacent segments that are radially misaligned after splicing to form a full circle.

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

[0013] A bottom support structure, wherein the 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 are enclosed to form the pipe delivery channel;

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

[0015] A top support structure, wherein the top support structure is located above the middle support structure and is connected to the middle support section, and the vertical position of the top support structure is adjusted by the middle support section so that the top support structure can be abutted against two adjacent segments which are radially misaligned after being spliced ​​on the upper inner wall or the upper middle inner wall of the tunnel; wherein the two adjacent segments are adjacent along the circumferential direction of the tunnel.

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

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

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

[0019] At least part of the middle support member and the telescopic member connected thereto form the middle support section.

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

[0021] When the telescopic member is in an extended state, the telescopic member can push the top support structure to move upward to a position where the two adjacent segments which are radially displaced after being spliced ​​with the upper inner wall or the middle-upper inner wall of the tunnel abut against each other;

[0022] And / or, when the telescopic member is in an extended state, the telescopic member can push the middle support member to swing radially outward from the tunnel to a position where two adjacent segments radially displaced after being spliced ​​with the middle inner wall of the tunnel abut against each other.

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

[0024] Two top support members are arc-shaped rod-shaped structures, one ends of the two top support members are hinged, and the other ends of the two top support members are respectively connected to the two telescopic members.

[0025] In a preferred embodiment, at least one limiting member is protruding upward from the upper ends of the two middle support members, and at least one limiting groove is provided at the left and right ends of the top support structure respectively. The limiting member can be movably inserted into the limiting groove to limit the relative position relationship between the top support structure and the middle support member in the axial direction of the tunnel.

[0026] In a preferred embodiment, there are multiple limit members and multiple limit grooves, and the multiple limit members are respectively arranged on both sides of the telescopic member, and the multiple limit grooves are respectively arranged on both sides of the top supporting structure and one end hinged to the telescopic member.

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

[0028] a support frame and at least two base members,

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

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

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

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

[0033] A plurality of anti-falling rods are provided, wherein the anti-falling rods are extended along the axial direction of the tunnel, and the plurality of anti-falling rods are respectively connected to the two end surfaces of the top support structure that are opposite to each other along the axial direction of the tunnel and the two end surfaces of the middle support structure that are opposite to each other along the axial direction of the tunnel.

[0034] In a preferred embodiment, the driving 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, and the roundness adjustment mechanism is pushed to move in the tunnel through the movable end.

[0036] In a preferred embodiment, the driving mechanism comprises:

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

[0038] One end of the cylinder body connected to the moving mechanism forms the fixed end of the driving mechanism, and one end of the cylinder rod 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 shield machine mainframe via a hydraulic cylinder, and the hydraulic cylinder is used to adjust the distance between the moving mechanism and the main beam.

[0040] The present invention provides a roundness adjustment method, which uses the roundness adjustment device described above to perform a rounding operation on a pipe segment in a tunnel. The roundness adjustment method comprises the following steps:

[0041] Step S1: The moving mechanism and the shield machine main machine move together to the position of the spliced ​​segment in the tunnel;

[0042] Step S2: The driving mechanism drives the roundness adjustment mechanism to move in the tunnel to two adjacent segments which are radially misaligned after being spliced;

[0043] Step S3: the roundness adjustment mechanism performs a pressing operation on the two adjacent segments which are radially misaligned after being spliced ​​to form a round shape, so as to eliminate the radial misalignment between the two adjacent segments;

[0044] Step S4: After the full-circle operation is completed, the driving 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 and two adjacent segments radially misaligned after being spliced ​​with the upper inner wall or the middle upper inner wall of the tunnel abut against each other;

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

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

[0049] The end of the elongated telescopic member connected to the top support structure is used to push the top support structure upward to a position where two adjacent segments with radial dislocation after splicing with the upper inner wall or the middle upper inner wall of the tunnel abut against each other to perform a full circle abutment operation;

[0050] The other end of the telescopic member connected to the middle support member is extended to push the middle support member to swing radially outward from the tunnel to a position where two adjacent segments radially displaced after being spliced ​​with the middle inner wall of the tunnel abut against each other to perform a full-circle abutment 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 the present invention is arranged at the rear of the shield machine main body, and the pipe ring of the tunnel just assembled by the pipe assembly machine of the shield machine is abutted and made into a whole circle through the roundness adjustment device, and the pipe ring is composed of a plurality of pipe segments spliced ​​end to end along the circumference of the tunnel; wherein, the moving mechanism of the roundness adjustment device is connected to the main beam of the shield machine main body, so that the moving mechanism can move along with the excavation movement of the shield machine main body during the movement and excavation of the main beam of the shield machine main body, and the moving mechanism is arranged at the rear of the main beam, that is, the moving mechanism is arranged at the rear of the pipe assembly machine of the shield machine, so that the moving mechanism can move in the tunnel formed by the pipe segments assembled by the pipe assembly machine; the roundness adjustment mechanism of the roundness adjustment device can abut and make a whole circle on the partially spliced ​​pipe segments in the tunnel.

[0053] In the present invention, since a pipe delivery channel is formed between the roundness adjustment mechanism and the inner wall of the tunnel, the pipe segments can be transported from the rear of the shield machine to the pipe splicing machine through the pipe delivery channel, thereby avoiding the situation where the pipe splicing machine cannot normally perform the pipe splicing operation during the process of the roundness adjustment mechanism performing the rounding operation. In the present invention, the tunneling machine performs the tunneling operation in front of the tunnel, the pipe splicing machine performs the pipe splicing operation by using the pipe segments transported by the pipe delivery channel, and the roundness adjustment device performs the rounding operation on the pipe segments partially assembled by the pipe splicing machine. The operations of the three can be performed synchronously, that is, they run at the same rhythm, which improves the working efficiency of the shield machine main machine. Efficiency; the driving mechanism of the roundness adjustment device sets the fixed end on the moving mechanism and connects the movable end with the roundness adjustment mechanism, so that the movable end of the driving mechanism can push the roundness adjustment mechanism to move in the tunnel along the axial direction or other directions of the tunnel. That is, the roundness adjustment device can flexibly adjust and select which part of the pipe segment in the tunnel needs to be abutted against the roundness adjustment device to make a full circle according to the current pipe splicing progress and the time required for the full circle, thereby avoiding the situation where the roundness adjustment mechanism must be moved with the excavation progress of the shield machine main body due to relying solely on the connection between the roundness adjustment mechanism and the moving mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0057] Figure 4 for Figure 1 The enlarged structure diagram of

[0058] Figure 5 for Figure 3 The enlarged structure diagram of

[0059] Figure 6 It is an axial view of the roundness adjustment mechanism of the present invention before the full circle;

[0060] Figure 7 It 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 segment before it is fully circled;

[0062] Fig. 9 for Figure 8 A partial enlarged view of position A in the middle;

[0063] Fig.10 This is an axial view of the tunnel segment during the full circle process;

[0064] Fig.11 for Fig.10 A partial enlarged view of position B in the middle;

[0065] Fig.12 It is a structural diagram of the roundness adjustment mechanism of the present invention;

[0066] Fig.13 It is a structural diagram of the connection between the anti-falling rod and the roundness adjustment mechanism of the present invention;

[0067] Fig.14 It is a structural diagram of the connection between the backing plate and the roundness adjustment mechanism of the present invention;

[0068] Fig.15 It is a schematic diagram of the abutment between the backing plate and the tube segment of the present invention;

[0069] Fig.16 It is a structural diagram of the telescopic member of the roundness adjustment mechanism of the present invention;

[0070] Fig.17 It is a side structural diagram of the roundness adjustment mechanism of the present invention;

[0071] Fig.18 It is a flow chart of the steps of the roundness adjustment method of the present invention.

[0072] Description of Figure Numbers:

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

[0074] 200, roundness adjustment mechanism; 210, bottom support structure; 211, support frame; 212, base member; 213, walking wheel; 220, middle support structure; 221, middle support section; 2211, middle support member; 2212, telescopic member; 230, top support structure; 231, top support member; 240, pad;

[0075] 300, driving mechanism; 310, movable end; 320, fixed end; 330, telescopic oil cylinder; 331, cylinder body; 332, cylinder rod;

[0076] 400, mainframe of shield machine; 410, main beam; 420, segment;

[0077] 500, pipe delivery channel;

[0078] 601, limiting member; 602, limiting groove;

[0079] 700. Anti-fall bar; 710. Friction plate. DETAILED DESCRIPTION

[0080] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0081] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0082] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0083] Implementation Method 1

[0084] like Figures 1 to 3 As shown, the present invention provides a roundness adjustment device, which is used to perform a rounding operation on a pipe segment 420 in a tunnel, and the roundness adjustment device includes:

[0085] A moving mechanism 100, wherein the moving mechanism 100 is located behind the shield machine mainframe 400, and the moving mechanism 100 is connected to the main beam 410 of the shield machine mainframe 400, so as to move synchronously with the shield machine mainframe 400;

[0086] A roundness adjustment mechanism 200, the roundness adjustment mechanism 200 is located behind the shield machine mainframe 400 and connected to the moving mechanism 100, the roundness adjustment mechanism 200 is used to abut against the at least partially spliced ​​pipe segments 420 in the tunnel, and the bottom of the roundness adjustment mechanism 200 is used to form a pipe delivery channel 500 for delivering the pipe segments 420 between the bottom and the inner wall of the tunnel;

[0087] A driving mechanism 300, wherein the driving mechanism (300) is connected between the moving mechanism (100) and the roundness adjustment mechanism (200), and the driving mechanism (300) can push the roundness adjustment mechanism (200) to move in the tunnel, so that the roundness adjustment mechanism 200 can press two adjacent pipe segments 420 that are radially misaligned after splicing to form a complete circle.

[0088] The roundness adjustment device provided by the present invention is arranged at the rear of the shield machine mainframe 400, and the pipe ring of the tunnel just assembled by the shield machine pipe assembly machine is mortgaged and made into a whole circle through the roundness adjustment device. The pipe ring is composed of a plurality of pipe segments 420 spliced ​​end to end along the circumference of the tunnel; wherein the moving mechanism 100 of the roundness adjustment device is connected to the main beam 410 of the shield machine mainframe 400, so that the moving mechanism 100 can move along with the excavation movement of the shield machine mainframe 400 during the movement and excavation of the main beam 410 of the shield machine mainframe 400, and the moving mechanism 100 can move along with the excavation movement ... during the movement and excavation of the main beam 410 of the shield machine mainframe 400. The moving mechanism 100 is arranged behind the main beam 410, that is, the moving mechanism 100 is arranged behind the pipe splicing machine of the shield machine, so that the moving mechanism 100 can move in the tunnel formed by the pipe segments 420 assembled by the pipe splicing machine; the roundness adjustment mechanism 200 of the roundness adjustment device can abut the partially spliced ​​pipe segments 420 in the tunnel formed by the pipe segments 420 to form a full circle, and the roundness adjustment mechanism 200 is connected to the moving mechanism 100, so that the roundness adjustment mechanism 200 can be synchronized with the moving mechanism 100 and follow the movement of the shield machine main machine 400 The pipe segment 420 that has just been spliced ​​can be abutted and rounded by the pipe delivery channel 500 formed between the roundness adjustment mechanism 200 and the inner wall of the tunnel, so that the pipe segment 420 can be transported from the rear of the shield machine to the pipe splicing machine through the pipe delivery channel 500, thereby preventing the pipe splicing machine from being unable to perform the pipe splicing operation normally during the process of the roundness adjustment mechanism 200 being rounded; the driving mechanism 300 of the roundness adjustment device, by setting the fixed end 320 on the moving mechanism 100, connects the movable end 310 with the roundness adjustment mechanism 200 The movable end 310 of the driving mechanism 300 is connected so that the movable end 310 can push the roundness adjustment mechanism 200 to move in the tunnel along the axial direction or other directions of the tunnel. That is, the roundness adjustment device can flexibly adjust and select which part of the pipe segment 420 in the tunnel the roundness adjustment device needs to abut to complete a circle according to the current pipe splicing progress and the time required for the complete circle, thereby avoiding the situation where the roundness adjustment mechanism 200 must be moved with the excavation progress of the shield machine main unit 400 due to relying solely on the connection between the roundness adjustment mechanism 200 and the moving mechanism 100.

[0089] Specifically, in the embodiment of this invention, the pipe ring refers to a plurality of arc-shaped pipe segments 420 spliced ​​along the circumference of the tunnel to form a circular pipe ring. Due to the formation pressure and the failure of the formation slurry to solidify in time, there may be a radial misalignment between the adjacent assembled pipe segments 420 along the circumference of the tunnel. Figure 8 and Fig. 9 As shown, a certain pipe segment 420 is closer to the axial center of the tunnel than the circumferentially adjacent pipe segments 420. The abutting full circle in this embodiment, that is, the roundness adjustment mechanism 200 is used to press the two adjacent pipe segments 420 with radial misalignment after splicing in the radial direction of the tunnel. Since the positions of the two adjacent pipe segments 420 with radial misalignment in the radial direction of the tunnel are different, the pipe segment 420 with radial misalignment inward in the tunnel is first abutted by the roundness adjustment mechanism 200 and pushed to the radial outer side of the tunnel. Fig.10 and Fig.11 As shown, until the two adjacent segments 420 are at the same radial position of the tunnel.

[0090] In this embodiment, the roundness adjustment mechanism 200 is a device that can move outward along the radial direction of the tunnel. The roundness adjustment mechanism 200 can be abutted against at least partially spliced ​​segments 420. In this embodiment, the roundness adjustment mechanism 200 can be abutted against two adjacent segments 420 that are radially misaligned after splicing at the upper inner wall or the middle and upper inner wall of the tunnel. In other embodiments, the roundness adjustment mechanism 200 can also be abutted against two adjacent segments 420 that are radially misaligned after splicing at the middle and lower inner wall of the tunnel. Compared with the existing full circle area (the upper inner wall of the tunnel), the present invention has a larger full circle area for the misaligned segments 420.

[0091] In this embodiment, the moving mechanism 100 is connected to the rear end of the main beam 410 of the shield machine main body. When the shield machine main body 400 is excavating, the main beam 410 of the shield machine main body 400 moves forward with the excavation progress of the shield machine main body 400. The moving mechanism 100 follows the movement of the shield machine main body 400 by connecting with the main beam 410 of the shield machine main body 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 place the telescopic cylinder 330 of the driving mechanism 300.

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

[0093] A bottom support structure 210, wherein the 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] A middle support structure 220, the middle support mechanism is located above the bottom support structure 210 and connected to the bottom support structure 210, and the middle support structure 220 has a middle support section 221 that can move in a vertical direction;

[0095] A top support structure 230, wherein the top support structure 230 is located above the middle support structure 220 and is connected to the middle support section 221, and the vertical position of the top support structure 230 is adjusted by the middle support section 221 so that the top support structure 230 can be abutted against two adjacent segments 420 which are radially misaligned after being spliced ​​at the upper inner wall or the upper middle inner wall of the tunnel; wherein the two adjacent segments 420 are adjacent along the circumferential direction of the tunnel.

[0096] The roundness adjustment device provided in this embodiment has a bottom support structure 210 that is movably mounted on the lower inner wall of the tunnel, so as to facilitate the movement of the roundness adjustment mechanism 200 in the axial direction of the tunnel. In this embodiment, when the roundness adjustment mechanism 200 has not yet implemented a full circle, the bottom support structure 210 is dragged by the driving mechanism 300 to the second ring segment 420 of the tunnel where the tail shield is removed and is mounted on the inner wall of the segment 420 to wait for the implementation of the full circle. When the roundness adjustment mechanism 200 implements the full circle, the bottom support structure 210 is pushed by the driving mechanism 300 to the first ring segment 420 of the tunnel where the tail shield is removed to implement the full circle.

[0097] Related References Figure 6 As shown, the two ends of the bottom support structure 210 in this embodiment 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 sizes can be transported from the pipe delivery channel 500 to the pipe splicing machine; in this embodiment, refer to Fig.14 , Fig.15 and Fig.17 As shown, a pad 240 is provided on the radial outer side of the middle support structure 220 and the top support structure 230 for fitting against the pipe segment 420 to prevent the hard structures of the middle support structure 220 and the top support structure 230 from directly pressing against the pipe segment 420 and causing pressure damage to the pipe 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 a specific embodiment, the middle support section 221 is a retractable rod, and in another specific embodiment, the middle support section 221 is a swingable hinge, and the middle support section 221 achieves vertical movement by relying on the displacement of the swinging path in the vertical direction during the swinging process.

[0099] The roundness adjustment device provided in this embodiment has a top support structure 230 which 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 press against two adjacent segments 420 which are radially misaligned after being spliced ​​on the upper inner wall or the upper middle inner wall of the tunnel. The arc of the top support structure 230 in this embodiment is the same as the circumferential curvature of the tunnel, so that the two adjacent segments 420 which are radially misaligned after being spliced ​​on the upper inner wall or the upper middle inner wall of the tunnel can be pressed to the same circumferential curvature as the tunnel to eliminate the radial misalignment of the two adjacent segments 420.

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

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

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

[0103] At least part of the middle support member 2211 and the telescopic member 2212 connected thereto form the middle support section 221 .

[0104] The roundness adjustment device provided in this embodiment has two middle support members 2211 symmetrically arranged at both ends of the bottom support structure 210. The two ends of the bottom support structure 210 of this embodiment are mounted on the lower inner wall of the tunnel, so that when the middle support member 2211 applies a vertical force, the torque acting on the lower inner wall of the tunnel can be reduced, thereby increasing the bearing capacity range of the roundness adjustment mechanism 200. In this embodiment, the two middle support members 2211 are symmetrically arranged at both ends of the bottom support structure 210, so that the bottom support structure 210 can evenly share the force required to push the top support structure 230 when moving vertically, thereby avoiding the risk of shortening the service life of the middle support member 2211 due to excessive force. At the same time, the separate arrangement of the two middle support members 2211 can also make the top support structure 230 more stable when lifting or pressing.

[0105] The roundness adjustment device provided in this embodiment, the two roundness adjustment devices provided in this embodiment, the two middle support members 2211 are respectively located above the two middle support members 2211, and the two middle support members 2211 are respectively hinged to the top support structure 230, that is, the two middle support members 2211 and the telescopic members 2212 located on the upper parts of the two middle support members 2211 together constitute the middle support section 221. In another embodiment, the middle support member 2211 and the telescopic member 2212 located on the upper parts of the middle support member 2211 may also together constitute the middle support section 221.

[0106] In a 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 along the vertical direction, and the telescopic member 2212 pushes the top support structure 230 to move along the vertical direction.

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

[0108] like Figure 6 and Figure 7 As shown, in a specific embodiment, the middle support member 2211 is an arc-shaped rod-shaped structure, and the curvature of the two middle support members 2211 is respectively adapted to the curvature of the inner contour of the left inner wall and the right inner wall of the tunnel, so that the two middle support members 2211 are respectively hinged to the left and right ends of the top support structure 230 through the two telescopic members 2212 to form an arc-shaped full-circle frame that can fit the spliced ​​pipe segments 420 on the inner wall of the tunnel;

[0109] 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 which are radially displaced after being spliced ​​with the upper inner wall or the middle-upper 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 middle support member 2211 to swing radially outward from the tunnel to a position where two adjacent segments 420 that are radially displaced after being spliced ​​with the middle inner wall of the tunnel abut against each other.

[0111] The roundness adjustment device provided in this embodiment is capable of adapting the curvature of the top support structure 230 to the curvature of the inner contour of the upper inner wall of the tunnel. Under the extension 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 the two adjacent pipe segments 420 with radial dislocation after the upper inner wall or the middle-upper inner wall of the tunnel are abutted. By further extending the telescopic member 2212, the abutting pressure of the top support structure 230 on the two adjacent pipe segments 420 with radial dislocation after the upper inner wall or the middle-upper inner wall of the tunnel can be increased.

[0112] The middle support member 2211 in this embodiment is hinged to the left and right ends of the bottom support structure 210 respectively, and is used to swing radially outward toward the middle inner wall of the tunnel under the pushing action of the telescopic member 2212 to a position where it abuts against two adjacent pipe segments 420 that are radially displaced after the left inner wall and the right inner wall of the tunnel are spliced. By further extending the telescopic member 2212, the abutting pressure of the middle support member 2211 on the two adjacent pipe segments 420 that are radially displaced after the left inner wall and the right inner wall of the tunnel are spliced ​​can be increased. Compared with the existing full circular area (the upper inner wall of the tunnel), the present invention has a larger full circular area for the displaced pipe segments 420.

[0113] The curvature of the middle support member 2211 in this embodiment is respectively adapted to the curvature of the inner contour of the left inner wall and the right inner wall of the tunnel, that is, the two middle support members 2211 are respectively hinged to the left and right ends of the top support structure 230 through the two telescopic members 2212 to form an arc-shaped full-circle frame that can fit with the pipe segments 420 spliced ​​on the inner wall of the tunnel, that is, through the two middle support members 2211 and the top support structure 230, the left inner wall and the right inner wall of the middle part of the tunnel, the middle and upper inner wall of the tunnel, and the upper inner wall of the tunnel can be pressed into a full circle at the same time, and it can be ensured that this part of the inner wall can have the same curvature as the tunnel.

[0114] The roundness adjustment device provided in this embodiment, in a specific embodiment, when the telescopic member 2212 is in an extended state, the top support structure 230 moves upward to a position where two adjacent segments 420 that are radially displaced after splicing the upper inner wall or the middle and upper inner wall of the tunnel abut against each other. At the same time, when the telescopic member 2212 is in an extended state, the telescopic member 2212 can push the middle support member 2211 to swing toward the radial outer side of the tunnel to a position where two adjacent segments 420 that are radially displaced after splicing the middle inner wall of the tunnel abut against each other. By further increasing the extended state of the telescopic member 2212, the pressure of the middle support member 2211 on the middle inner wall of the tunnel and the pressure of the top support structure 230 on the two adjacent segments 420 that are radially displaced after splicing the upper inner wall or the middle and upper inner wall of the tunnel can be increased at the same time.

[0115] In another specific embodiment of the roundness adjustment device provided in the present embodiment, when the telescopic member 2212 is in an extended state, the supporting structure 230 first moves upward to a position where two adjacent segments 420 with radial displacement after being spliced ​​with the upper inner wall or the middle and upper inner wall of the tunnel abut against each other, and then the telescopic member 2212 is further extended, so as to increase the pressure of the supporting structure 230 against the two adjacent segments 420 with radial displacement after being spliced ​​with the upper inner wall or the middle and upper inner wall of the tunnel; on this basis, by further extending the telescopic member 2212, the telescopic member 2212 can push the middle supporting member 2211 to swing radially outwardly of the tunnel to a position where two adjacent segments 420 with radial displacement after being spliced ​​with the middle inner wall of the tunnel abut against each other, and finally, by further increasing the extended state of the telescopic member 2212, the pressure of the middle supporting member 2211 against the middle inner wall of the tunnel can be increased.

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

[0117] Two top support members 231 are arc-shaped rod-shaped structures. One ends of the two top support members 231 are hinged, and the other ends of the two top support members 231 are respectively connected to the two telescopic members 2212.

[0118] The roundness adjustment device provided in this embodiment, by setting the top support structure 230 as two hinged arc-shaped top support members 231, and the other ends of the two top support members 231 are respectively connected to the two telescopic members 2212, so that when the telescopic members 2212 are extended, the two top support members 231 of the top support structure 230 first move upward as a whole, and the hinged parts of the two top support members 231 first abut against the inner wall of the tunnel, and in the process that the middle support section 221 continues to push the two top support members 231 to move upward, the two top support members 231 swing from the abutting position toward the radial outside of the tunnel to the position where they abut against the two adjacent pipe segments 420 that are radially displaced after splicing with the upper inner wall or the middle and upper inner wall of the tunnel. At the same time, the two middle support members can also be driven by the extension of the telescopic member 2212. 2211 swings radially outwardly toward the tunnel and abuts against the position of two adjacent segments 420 that are radially misaligned after being spliced ​​with the middle inner wall of the tunnel; that is, the top support structure 230 changes from vertically pushing upward to abutting to swinging upward, so that the top support structure 230 and the middle support structure 220 can simultaneously press the left inner wall and the right inner wall of the middle part of the tunnel, the middle and upper inner wall of the tunnel, and the upper inner wall of the tunnel in a full circle, so that the pressing effect is more uniform and the pressing process is more synchronized; it avoids 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 inner wall and the right inner wall of the middle part of the tunnel, resulting in the movement of the adjacent misaligned segments 420 of the upper inner wall, causing the segments 420 circumferentially of the tunnel to produce linkage deformation, thereby affecting the pressing quality.

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

[0120] In the roundness adjustment device provided in this embodiment, the limiting piece 601 at the upper end of the middle support section 221 is generally a protrusion, and the limiting piece 601 is formed by protruding upward along the axis of the middle support piece 2211. In a specific embodiment, the middle support piece 2211 is an arc-shaped rod-shaped structure, and the limiting piece 601 is also an arc-shaped rod-shaped structure. In this embodiment, the limiting groove 602 is generally a groove concave 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-shaped structure, and the limiting groove 602 is also an arc-shaped groove.

[0121] Specifically in this embodiment, the limit member 601 is movably arranged in the limit groove 602, that is, when the top support structure 230 moves vertically upward relative to the middle support member 2211, the telescopic member 2212 can be prevented from being affected by the gravity of the top support structure 230, causing the telescopic member 2212 to deform and bend, thereby causing the top support structure 230 and the middle support member 2211 to deform and misalign in the axial direction of the tunnel; in this embodiment, the length of the limit member 601 and the limit groove 602 is set to be greater than the extension stroke of the telescopic member 2212.

[0122] like Fig.16 As shown, in a specific embodiment, there are multiple limit members and multiple limit grooves 602, and the multiple limit members are respectively arranged on both sides of the telescopic member 2212, and the multiple limit grooves 602 are respectively arranged on both sides of the top support structure 230 and one end hinged to the telescopic member 2212.

[0123] The roundness adjustment device provided in this embodiment can more firmly limit the relative position relationship between the top support structure 230 and the middle support member 2211 in the axial direction of the tunnel by setting a plurality of matching limit members and limit grooves 602, that is, limit the top support structure 230 and the middle support member 2211 to be at the same position in the axial direction of the tunnel, and avoid the top support structure 230 and the middle support member 2211 being misaligned in the axial direction of the tunnel. At the same time, the plurality of limit members are respectively arranged on both sides of the telescopic member 2212, and the plurality of limit grooves 602 are respectively arranged on both sides of one end of the top support structure 230 and hinged to the telescopic member 2212, so as to avoid the limit members and the limit grooves 602 interfering with the telescopic work of the telescopic member 2212.

[0124] like Fig.12 As shown, in a specific embodiment, the bottom support structure 210 includes:

[0125] A support frame 211 and at least two base members 212,

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

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

[0128] The roundness adjustment device provided in this embodiment is provided with a support frame 211 and a base member 212, so that the middle support member 2211 can be connected through the support frame 211, and a platform or foundation for applying a force to the pipe segment to press the whole circle can be provided to the middle support structure 220 and the top support structure 230. The base member 212 is used to stably set the support frame 211 on the lower inner wall of the tunnel. In this embodiment, at least two base members 212 are set at the left and right ends of the bottom of the support frame 211 to increase the cross-sectional area of ​​the pipe delivery channel 500 in the axial direction, so as to avoid the base member 212 occupying the cross-sectional area of ​​the pipe delivery channel 500 and 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, so that the arc-shaped middle support member 2211 can completely abut against the middle inner wall of the tunnel, increase the abutment range of the middle support member 2211, and thus increase the whole circle area of ​​the roundness adjustment mechanism 200.

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

[0130] The roundness adjustment device provided in this embodiment can facilitate the movement of the base support structure 210 in the tunnel by setting walking wheels 213 at the bottom of the base member 212. That is, the roundness adjustment mechanism 200 can be moved in the axial direction of the tunnel through the driving 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 , Fig.13 and Fig.17 As shown, in a specific embodiment, the roundness adjustment mechanism 200 further includes:

[0132] A plurality of anti-fall bars 700 are provided, and the anti-fall bars 700 are extended along the axial direction of the tunnel, and the plurality of anti-fall bars 700 are respectively connected to the two end surfaces of the top support structure 230 that are opposite to each other along the axial direction of the tunnel and the two end surfaces of the middle support structure 220 that are opposite to each other along the axial direction of the tunnel.

[0133] In the roundness adjustment device provided in this embodiment, since the top support structure 230 and the middle support structure 220 are arc-shaped rods, and due to the influence of the construction environment of the tunnel, the ratio of the thickness of the top support structure 230 or the middle support structure 220 to the radius is small, resulting in the top support structure 230 or the middle support structure 220 being easy to fall in the tunnel. In order to avoid the top support structure 230 or the middle support structure 220 from falling, it is necessary to refer to Figure 4 and Fig.17As shown, a plurality of anti-falling rods 700 are arranged on the two opposite end surfaces of the top support structure 230 along the axial direction of the tunnel and on the two opposite end surfaces of the middle support structure 220 along the axial direction of the tunnel, that is, when the top support structure 230 or the middle support structure 220 falls, the top support structure 230 or the middle support structure 220 can be stuck on the inner wall of the tunnel through the anti-falling rods 700 to avoid falling and affecting the safety of equipment and personnel. In this embodiment, a friction plate 710 is arranged at the end of the anti-falling rod 700, and the friction plate 710 is made of a flexible non-metallic material to prevent the hard structure of the anti-falling rod 700 from directly contacting the pipe segment 420 and causing scratches and damage to the pipe segment 420.

[0134] like Figure 4 and Figure 5 As shown, in a specific embodiment, the driving 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 movable end 310 is used to push the roundness adjustment mechanism 200 to move in the tunnel.

[0135] The roundness adjustment device provided in this embodiment is used to provide a thrust along the axial direction of the tunnel to the roundness adjustment mechanism 200 by setting a fixed end 320 and a movable end 310. The movable end 310 is retractable, 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 pipe segment that needs to be rounded as needed. In this embodiment, the driving mechanism 300 can adopt a telescopic cylinder 330. In another embodiment, the driving mechanism 300 can also adopt pneumatic, electromagnetic push rods and other devices. The specific device of the driving mechanism 300 is not limited. In this embodiment, in this embodiment, when the roundness adjustment mechanism 200 has not implemented the whole circle, 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 out of the tail shield through the movable end 310 of the driving mechanism 300 to wait for the implementation of the whole circle. When the roundness adjustment mechanism 200 implements the whole circle, 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 out of the tail shield through the driving mechanism 300 to implement the whole circle.

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

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

[0138] One end of the cylinder body 331 connected to the moving mechanism 100 forms the fixed end 320 of the driving mechanism 300 , and one end of the cylinder rod 332 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 and the top support structure 230, the moving mechanism 100 and the bottom support structure 210, and the moving mechanism 100 and the middle support structure 220 respectively through the telescopic cylinder 330, that is, the position of the roundness adjustment mechanism 200 in the tunnel can be dynamically adjusted according to the target required for the full circle. The cylinder body 331 of the telescopic cylinder 330 of this embodiment 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, so that the inclination angle of the telescopic cylinder 330 and the horizontal can be adjusted as the roundness adjustment mechanism 200 moves; according to the extended length of the telescopic cylinder 330, the misalignment between two adjacent ring segments 420 along the axial direction of the tunnel can also be rounded to prevent the center axis between the rings from shifting and the phenomenon that the screws of the segment 420 cannot be tightened.

[0140] In this embodiment, when the roundness adjustment mechanism 200 has not implemented the full circle, 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 out of the tail shield through the telescopic cylinder 330 of the driving mechanism 300 to wait for the implementation of the full circle. When the roundness adjustment mechanism 200 implements the full circle, 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 out of the tail shield through the driving mechanism 300 to implement the full circle.

[0141] like Figure 4 and Figure 5 As shown, in a specific embodiment, the moving mechanism 100 is connected to the main beam 410 of the shield machine mainframe 400 via a hydraulic cylinder 110 , and the hydraulic cylinder 110 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 can adjust the distance between the moving mechanism 100 and the main beam 410 by setting a hydraulic cylinder 110. That is, when the shield machine mainframe 400 is excavating forward and the main beam 410 is also moving forward, if the roundness adjustment mechanism 200 has not yet completed the full circle 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, thereby avoiding the situation where the roundness adjustment mechanism 200 and the pipe segment 420 are scratched or the roundness adjustment mechanism 200 is dragged and deformed by the main beam 410. It does not interfere with the working rhythm of the shield machine main unit 400, improves the overall working efficiency of the roundness adjustment device, and solves the problem that the operating rhythm of the rounding device and the pipe splicing machine cannot be synchronized; at the same time, if the shield machine main unit 400 does not move forward for excavation, and the pipe segment 420 assembled by the pipe splicing machine is farther than the roundness adjustment mechanism 200, so that the driving mechanism 300 cannot push the roundness adjustment mechanism 200 to the pipe segment 420 to be rounded, the hydraulic cylinder 110 can be used to shorten 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, thereby improving the overall working efficiency of the roundness adjustment device.

[0143] Implementation Method 2

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

[0145] Step S1: the moving mechanism 100 and the shield machine main unit 400 move together to the position of the spliced ​​pipe segment 420 in the tunnel;

[0146] Step S2: the driving mechanism 300 drives the roundness adjustment mechanism 200 to move in the tunnel to two adjacent segments 420 which are radially misaligned after being spliced;

[0147] Step S3: the roundness adjustment mechanism 200 performs a rounding operation on the two adjacent segments 420 that are radially misaligned after being spliced, so as to eliminate the radial misalignment between the two adjacent segments 420;

[0148] Step S4: After the full-circle operation is completed, the driving mechanism 300 retracts the roundness adjustment mechanism 200 to the moving mechanism 100 .

[0149] The roundness adjustment method provided by the present invention is combined with reference to Figures 5 to 7As shown, the moving mechanism 100 can move along with the excavation movement of the shield machine mainframe 400, that is, the moving mechanism 100 can move inside the pipe segment 420 assembled by the pipe splicing machine, so that the roundness adjustment device can make a whole circle on the pipe segment 420 spliced ​​in the tunnel; the driving mechanism 300 can push the roundness adjustment mechanism 200 to move in the tunnel along the axial direction or other directions of the tunnel, that is, the roundness adjustment device can flexibly adjust and select which part of the pipe segment 420 in the tunnel the roundness adjustment mechanism 200 needs to abut against to make a whole circle according to the current pipe splicing progress and the time required for the whole circle, and the roundness adjustment mechanism 200 can move along the axial direction or other directions of the tunnel. The tunnel radially presses the two adjacent segments 420 that are radially misaligned after splicing radially outward at the same time. Since the radial positions of the two adjacent segments 420 that are radially misaligned are different, the radially inner misaligned segment 420 is first abutted by the roundness adjustment mechanism 200 and pushed radially outward of the tunnel until the two adjacent segments 420 are at the same radial position of the tunnel, thereby achieving the purpose of eliminating the radial misalignment between the two adjacent segments 420. After the rounding operation is completed, the roundness adjustment mechanism 200 can also be retracted to the moving mechanism 100 by the driving mechanism 300 until the next rounding operation.

[0150] In a specific implementation, 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 being spliced ​​with the upper inner wall or the middle upper inner wall of the tunnel;

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

[0153] In the roundness adjustment method provided by the present invention, in a specific embodiment, the middle support section 221 is a retractable rod. When the whole circle is operated, the middle support section 221 of the middle support structure 220 is retracted and extended vertically to push the top support structure 230 to move vertically upward; in another specific embodiment, the middle support section 221 is a swingable hinge. When the whole circle is operated, the middle support section 221 achieves vertical movement by relying on the displacement of the swinging path in the vertical direction during the swinging process, thereby driving the top support structure 230 to move vertically upward. During the abutment process of the top support structure 230 moving vertically upward, the two adjacent pipe segments 420 are adjacent pipe segments 420 along the circumference of the tunnel.

[0154] In a specific implementation, the step S31 includes:

[0155] Step S311: Extend one end of the telescopic member 2212 connected to the top support structure 230 to push the top support structure 230 upward to a position where the two adjacent segments 420 with radial dislocation after splicing with the upper inner wall or the middle upper inner wall of the tunnel are butted against each other to perform a full circle butting operation;

[0156] Step S312: Extend the other end of the telescopic member 2212 connected to the middle support member 2211 to push the middle support member 2211 to swing radially outward from the tunnel to abut against two adjacent segments 420 that are radially displaced after being spliced ​​with the middle inner wall of the tunnel, and perform a full-circle abutment operation.

[0157] In a specific embodiment of the roundness adjustment method provided by the present invention, that is, in step S311, when one end of the telescopic member 2212 is extended, the supporting structure 230 first moves upward to the position where two adjacent segments 420 with radial displacement after splicing of the upper inner wall or the middle and upper inner wall of the tunnel abut against each other; further extending this end of the telescopic member 2212 can increase the pressure of the supporting structure 230 on the two adjacent segments 420 with radial displacement after splicing of the upper inner wall or the middle and upper inner wall of the tunnel; on this basis, that is, in step S312, the other end of the telescopic member 2212 is extended, and the telescopic member 2212 can push the middle support member 2211 to swing toward the radial outer side of the tunnel to the position where two adjacent segments 420 with radial displacement after splicing of the middle inner wall of the tunnel abut against each other; finally, by further increasing the extended state of the telescopic member 2212, the pressure of the middle support member 2211 on the middle inner wall of the tunnel can be increased.

[0158] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is 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 in the scope of protection of the present invention.

Claims

1. A roundness adjustment device, used for rounding a segment (420) in a tunnel, characterized in that: The roundness adjustment device comprises: A moving mechanism (100), the moving mechanism (100) being located behind the shield machine mainframe (400), and the moving mechanism (100) being connected to a main beam (410) of the shield machine mainframe (400); a roundness adjustment mechanism (200), the roundness adjustment mechanism (200) being located behind the shield machine mainframe (400) and connected to the moving mechanism (100), the roundness adjustment mechanism (200) being used to abut against the at least partially spliced ​​pipe segments (420) in the tunnel, the bottom of the roundness adjustment mechanism (200) being used to form a pipe delivery channel (500) for delivering the pipe segments (420) between the bottom and the inner wall of the tunnel; A driving mechanism (300) is connected between the moving mechanism (100) and the roundness adjustment mechanism (200), and the driving mechanism (300) can push the roundness adjustment mechanism (200) to move in the tunnel, so that the roundness adjustment mechanism (200) can press two adjacent segments (420) that are radially misaligned after splicing to form a complete circle.

2. The roundness adjustment device according to claim 1, characterized in that: The roundness adjustment mechanism (200) comprises: A bottom support structure (210), the bottom support structure (210) being movably mounted on the lower inner wall of the tunnel, the bottom of the bottom support structure (210) and the inner wall of the tunnel enclosing to form the pipe delivery channel (500); A middle support structure (220), the middle support structure being located above the bottom support structure (210) and connected to the bottom support structure (210), the middle support structure (220) having a middle support section (221) movable in a vertical direction; A top support structure (230), wherein the top support structure (230) is located above the middle support structure (220) and is connected to the middle support section (221), and the vertical position of the top support structure (230) is adjusted by the middle support section (221) so that the top support structure (230) can abut against two adjacent segments (420) located on the upper inner wall or the middle upper inner wall of the tunnel and radially misaligned after being spliced; wherein the two adjacent segments (420) are adjacent along the circumferential direction of the tunnel.

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

4. The roundness adjustment device according to claim 3, characterized in that: The middle support member (2211) is an arc-shaped rod-shaped structure, and the curvature of the two middle support members (2211) is respectively adapted to the curvature of the inner contour of the left inner wall and the right inner wall of the tunnel, so that the two middle support members (2211) are respectively hinged to the left and right ends of the top support structure (230) through the two telescopic members (2212) to form an arc-shaped full-circle frame that can fit the spliced ​​pipe segments (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 being spliced ​​with the upper inner wall or the middle-upper inner wall of the tunnel; And / or, when the telescopic member (2212) is in an extended state, the telescopic member (2212) can push the middle support member (2211) to swing radially outward from the tunnel to a position where it abuts against two adjacent segments (420) that are radially misaligned after being spliced ​​with the middle inner wall of the tunnel.

5. The roundness adjustment device according to claim 3, characterized in that: The top support structure (230) comprises: Two top support members (231), each of which is an arc-shaped rod-shaped structure, one end of each of the two top support members (231) is hinged, and the other end of each of the two top support members (231) is respectively connected to the two telescopic members (2212).

6. The roundness adjustment device according to claim 4, characterized in that: At least one limiting member (601) is respectively protruding upward at the upper ends of the two middle supporting members (2211), and at least one limiting groove (602) is respectively provided at the left and right ends of the top supporting structure (230), and the limiting member (601) is movably inserted into the limiting groove (602) to limit the relative position relationship between the top supporting structure (230) and the middle supporting member (2211) in the axial direction of the tunnel.

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

8. The roundness adjustment device according to claim 2, characterized in that: The bottom support structure (210) comprises: A support frame (211) and at least two base members (212), At least two base members (212) are arranged at the left and right ends of the bottom of the support frame (211), and the base members (212) are used to erect the support frame (211) on the lower inner wall of the tunnel; The support frame (211), at least two base members (212) and the lower inner wall of the tunnel enclose the pipe delivery channel (500).

9. The roundness adjustment device according to claim 8, characterized in that: The bottom of the base member (212) is provided with walking wheels (213) to drive the roundness adjustment mechanism (200) to move in the tunnel.

10. The roundness adjustment device according to claim 2, characterized in that: The roundness adjustment mechanism (200) further comprises: A plurality of anti-fall bars (700) are provided, wherein the anti-fall bars (700) are extended along the axial direction of the tunnel, and the plurality of anti-fall bars (700) are respectively connected to the two end surfaces of the top support structure (230) opposite to each other along the axial direction of the tunnel and the two end surfaces of the middle support structure (220) opposite to each other along the axial direction of the tunnel.

11. The roundness adjustment device according to claim 2, characterized in that: The driving 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 movable end (310) is used to push the roundness adjustment mechanism (200) to move in the tunnel.

12. The roundness adjustment device according to claim 11, characterized in that: The driving mechanism (300) comprises: at least three telescopic oil cylinders (330), wherein the cylinder bodies (331) of the telescopic oil cylinders (330) are hinged on the moving mechanism (100), and the cylinder rods (332) of the at least three telescopic oil cylinders (330) are respectively hinged to the top support structure (230), the bottom support structure (210), and the middle support structure (220); One end of the cylinder body (331) connected to the moving mechanism (100) forms the fixed end (320) of the driving mechanism (300), and one end of the cylinder rod (332) connected to the roundness adjustment mechanism (200) forms the movable end (310).

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

14. A roundness adjustment method, using the roundness adjustment device according to any one of claims 1 to 13, for performing a rounding operation on a segment (420) in a tunnel, characterized in that: The roundness adjustment method comprises the following steps: Step S1: the moving mechanism (100) and the shield machine main unit (400) move together to the position of the spliced ​​pipe segment (420) in the tunnel; Step S2: the driving mechanism (300) drives the roundness adjustment mechanism (200) to move in the tunnel to two adjacent segments (420) which are radially misaligned after being spliced; Step S3: the roundness adjustment mechanism (200) performs a pressing operation on two adjacent segments (420) that are radially misaligned after being spliced ​​to form a round shape, so as to eliminate the radial misalignment between the two adjacent segments (420); Step S4: After the rounding operation is completed, the driving mechanism (300) retracts the roundness adjustment mechanism (200) to the moving mechanism (100).

15. The roundness adjustment method according to claim 14, characterized in that: The step S3 comprises: 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) and two adjacent segments (420) radially misaligned after being spliced ​​with the upper inner wall or the middle upper inner wall of the tunnel abut against each other; Wherein, two adjacent segments (420) are adjacent along the circumferential direction of the tunnel.

16. The roundness adjustment method according to claim 15, characterized in that: The step S31 comprises: The end of the elongated telescopic member (2212) connected to the top support structure (230) is used to push the top support structure (230) upward to a position where two adjacent segments (420) with radial dislocation after splicing with the upper inner wall or the middle upper inner wall of the tunnel are butted against each other to perform a full circle butting operation; The other end of the telescopic member (2212) connected to the middle support member (2211) is extended to push the middle support member (2211) to swing radially outward from the tunnel to a position where two adjacent segments (420) that are radially misaligned after being spliced ​​with the middle inner wall of the tunnel are abutted to perform a full-circle abutment operation.

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