Rigid-flexible socket type shield tunnel joint structure

Abstract

The invention relates to the technical field of shield tunnels, and discloses a rigid-flexible socket type shield tunnel joint structure which comprises a socket type structure, a rotor assembly, a screw, a first embedded part and a second embedded part. The first embedded part and the second embedded part are embedded in the adjacent pipe pieces correspondingly, the effects of the bolt and the reinforcing steel bars are fully exerted through the embedded parts, and the overall bearing capacity of the bolt is improved; one end of the screw is inserted, and the joint is introduced into the rotor assembly, so that the sensitivity of the joint between rings to structure manufacturing and assembly errors is reduced; the screw rod can be used for fastening, so that the shear rigidity of the joint is ensured; through optimization design, after the shearing force of the connector reaches a certain value, a screw rod can be tightened and loosened, so that the rigidity of the connector is reduced, the rigid-flexible state change under relatively extreme conditions in the operation process is realized, and the self-adaptability of the connector structure to the extreme conditions is improved; and the bolt rod is fastened again in the later period, so that the structural rigidity of the joint can be recovered, and the repairability of the joint is realized.

Description

Technical Field

[0001] The invention relates to the technical field of shield tunnels, and in particular to a rigid-flexible plug-in shield tunnel joint structure. Background Art

[0002] A shield tunnel is a tunnel excavated by a shield machine and lined by installing segments. The types of segments are divided into reinforced concrete segments, steel segments, cast iron segments, steel fiber concrete segments and composite segments according to their materials. Adjacent segments are connected by joint structures.

[0003] Compared with the segment and body parts, the joints have lower structural stiffness and strength, and are relatively weak locations in shield tunnel structures. Full-scale test results of joint structures and investigations of actual projects show that structural damage mostly occurs at tunnel joints. As a key part of the shield tunnel structure, the mechanical properties and performance of the joints largely affect the mechanical properties and performance of the entire lining structure.

[0004] In China, shield tunnel lining basically uses bolts as connectors. The use of bolts to connect joints has certain limitations, such as: (1) Bolt connection requires extremely high segment assembly accuracy, and the bolt installation is done manually. When the manufacturing errors of the segments and bolts and the segment assembly errors are large, bolt installation will be difficult, and often the segment will produce initial stress due to violent assembly, which will have an adverse effect on the segment forming quality; (2) The setting of the bolt hand hole weakens the segment cross section, making the segment near the hand hole prone to cracking or damage; (3) The bolts, steel bars and other structures are in an elastic state during the load-bearing process of the inter-ring joint, and the material's own strength is not fully exerted, but the concrete around the bolts is damaged. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the above-mentioned related art at least to a certain extent.

[0006] To this end, the present invention specifically provides the following technical solutions: A rigid-flexible plug-in shield tunnel joint structure, comprising a socket-type structure, a rotor assembly, a screw, an embedded part 1 and an embedded part 2; The second embedded part is used to be arranged on the connection side of a pipe segment; The embedded part 1 has a circular installation groove, and the embedded part 1 is used to be arranged on the connection side of another adjacent pipe segment; One end of the screw is connected to the second embedded part through the socket structure, and the other end of the screw is movably connected to the inner wall of the mounting circular groove through the rotor assembly.

[0007] Preferably, along the axial direction of the embedded part 2, the screw rod comprises an insertion section, a nut section, a sleeve section and a threaded section which are connected in sequence; The rotor assembly includes a plurality of rotating parts and a plurality of rotating parts corresponding to the rotating parts; Each of the rotating members is rotatably disposed on the sleeve section, each of the rotating members has a rotationally mounted portion, one side of each of the rotationally mounted members is rotationally connected to the corresponding rotationally mounted portion, and the other side of each of the rotationally mounted members is rotationally mounted on the inner wall of the mounting circular groove; The screw rod also includes a nut threadably sleeved on the threaded section.

[0008] Preferably, the rotating member is a cylindrical structure rotatably sleeved on the sleeve section.

[0009] Preferably, the screw-on portion is a rod-shaped structure fixed to the surface of the cylindrical structure via a spacing boss.

[0010] Preferably, the inner wall of the mounting circular groove has a protrusion with a rotating hole at a position corresponding to the rotating connector; The rotating joint includes a rotating rod rotatably embedded in the rotating hole with the rotating hole protrusion and two connecting plates extending from the two ends of the rotating rod in a direction perpendicular to its own axis. The two connecting plates are also rotatably sleeved on the two ends of the rod-shaped structure through sleeve holes.

[0011] Preferably, the rod-shaped structure, the spacing boss and the cylindrical structure are an integrated structure.

[0012] Preferably, adjacent cylindrical structures are engaged with each other via stepped surfaces.

[0013] Preferably, the edge of the nut segment is a regular polygon.

[0014] Preferably, an extrusion ring protrusion is provided at one end of the sleeve section close to the nut section.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The embedded parts one and two of the present invention are respectively embedded in adjacent pipe segments, and the embedded parts can give full play to the role of bolts and steel bars to improve the overall bearing capacity of the bolts; one end of the screw rod is inserted, and the joint is introduced into the rotor assembly to reduce the sensitivity of the inter-ring joint to structural manufacturing and assembly errors; the screw rod can be tightened to ensure the shear stiffness of the joint; through optimized design, the tightening of the screw rod can be loosened after the shear force of the joint reaches a certain value, so that the stiffness of the joint is reduced, and the "rigid-flexible" state change under extreme conditions during operation is realized, thereby improving the adaptability of the joint structure to extreme conditions; by tightening the bolt rod again at a later time, the stiffness of the joint structure can be restored, and the repairability of the joint can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the installation of the rotor assembly of the present invention; Figure 2 It is a schematic diagram of the exploded structure of the rotor assembly and the embedded part 1 of the present invention; Figure 3 It is a schematic diagram of the exploded structure of the rotor assembly and the screw of the present invention; Figure 4 This is a longitudinal section view of the screw rod of the present invention installed between embedded part 1 and embedded part 2.

[0018] In the figure: 1. Socket-and-spigot structure; 2. Rotor assembly; 3. Screw; 4. Embedded part 1; 5. Embedded part 2; 6. Installation circular groove; 61. Protrusion with rotating hole; 611. Rotating hole; 21. rotor; 211. screw-on portion; 2111. spacer boss; 2112. rod-shaped structure; 212. stepped surface; 22. screw-on member; 221. rotating rod; 222. connecting plate; 223. sleeve hole; 23. nut; 31. Insertion section; 32. Nut section; 33. Socket section; 34. Threaded section; 35. Extrusion ring convex. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0020] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] like Figures 1 to 4 As shown, the present invention provides a rigid-flexible plug-in shield tunnel joint structure, including a socket-type structure 1, a rotor assembly 2, a screw 3, an embedded part 4 and an embedded part 5; the embedded part 2 5 is used to be arranged on the connection side of a pipe segment; the embedded part 4 has a mounting circular groove 6, and the embedded part 4 is used to be arranged on the connection side of another adjacent pipe segment; one end of the screw 3 is connected to the embedded part 2 5 through the socket-type structure 1, and the other end of the screw 3 is movably connected to the inner wall of the mounting circular groove 6 through the rotor assembly 2.

[0024] The working principle of the present invention is: The embedded parts 1 4 and 2 5 of the present invention are respectively embedded in adjacent pipe segments. Through the form of embedded parts, the bolts and steel bars are fully utilized to improve the overall bearing capacity of the bolts; one end of the screw rod 3 is inserted, and the joint is introduced into the rotor assembly 2, which reduces the sensitivity of the inter-ring joint to structural manufacturing and assembly errors; the screw rod 3 can be tightened to ensure the shear stiffness of the joint; through optimized design, the "rigid-flexible" state change of the joint during operation can be achieved: that is, when encountering an earthquake, the shear force between the rings suddenly increases, and the rotor assembly 2 relaxes the constraint on the screw rod 3 to loosen the screw rod 3, thereby reducing the stiffness of the joint, which behaves as a flexible joint, reduces the damage to the structure under the action of the earthquake, and improves the seismic performance of the structure; it is convenient for further repair of the joint in the later stage, can restore the stiffness of the joint, reduce the misalignment of the inter-ring joint, and improve the toughness of the tunnel structure.

[0025] In some embodiments, along the axial direction of the embedded part 25, the screw rod 3 includes an insertion section 31, a nut section 32, a sleeve section 33 and a threaded section 34 connected in sequence; the rotor assembly 2 includes a plurality of rotors 21 and a plurality of screw-on parts 22 corresponding thereto; each of the rotors 21 is rotatably arranged on the sleeve section 33, each of the rotors 21 has a screw-on part 211, one side of each of the screw-on parts 22 is rotatably connected to the corresponding screw-on part 211, and the other side of each of the screw-on parts 22 is rotatably installed on the inner wall of the mounting circular groove 6; the screw rod 3 also includes a nut 23 threadedly sleeved on the threaded section 34. The rotor 21 is a cylindrical structure rotatably sleeved on the sleeve section 33. The screw-on part 211 is a rod-shaped structure 2112 fixed to the surface of the cylindrical structure through a spacing boss 2111. The inner wall of the mounting circular groove 6 is provided with a protrusion 61 with a rotating hole at a position corresponding to the screw-in component 22; the screw-in component 22 includes a rotating rod 221 rotatably embedded in the rotating hole 611 of the protrusion 61 with a rotating hole, and two connecting plates 222 formed by extending from both ends of the rotating rod 221 in a direction perpendicular to its own axis, and the two connecting plates 222 are also rotatably sleeved on both ends of the rod-shaped structure 2112 through sleeve holes 223, and an extrusion ring protrusion 35 is provided at one end of the sleeve section 33 close to the nut section 32.

[0026] In the above embodiment, the specific working principle of the rotor assembly 2 is as follows: First, the screw-on component 22 is a protrusion 61 with a rotating hole pre-installed on the mounting circular groove 6 of the embedded component 4 in a one-to-one correspondence, and the screw-on component 22 is formed by combining two connecting plates 222 and a rotating rod 221 in order to clamp the two ends of the protrusion 61 with a rotating hole, so that the connecting plates 222 are used to form a positioning for the rotating rod 221, and better rotation stability can be obtained, and the rotor 21 can be pre-installed on the screw-on component 22 in advance through the screw-on portion 211. The shape matching of the screw-on portion 211 and the connecting plate 222 is also to play a role in rotational anti-slip and improve rotational stability. At this time, the three rotors 21 in this embodiment are coaxially aligned. Note that the nut 23 of this embodiment is directly fixedly connected to the last rotor 21 at its tail. Of course, the nut 23 can also be set separately from the last rotor 21, but this step requires manual placement of it at the tail of the last rotor 21 for alignment; Then, the screw rod 3 is coaxially inserted into the three aligned rotors 21 (cylindrical structure) until the threaded section 34 of the screw rod 3 enters the nut 23. At this time, the nut section 32 is turned by a tool such as a wrench to gradually rotate the screw rod 3. At this time, since the nut 23 is fixedly mounted on the rotor 21, the nut 23 and the screw rod 3 rotate relative to each other and are gradually screwed in until the extrusion ring convex 35 on the screw rod 3 cooperates with the nut 23 to clamp the three rotors 21 so that they cannot rotate. At this time, one end of the screw rod 3 is installed; Finally, the other end of the screw 3 is directly inserted into the embedded part 2 5 to complete the entire installation, and the socket-type structure 1 formed between the two can be used for bite locking. The socket-type structure 1 belongs to the prior art, and this embodiment only shows one of its specific shapes by way of example. In essence, it is a structure that is bite-fixed through the deformation of the material itself and the concave-convex fit of the parent-child structure shape, and is not specifically limited in the present invention.

[0027] The above structure is clamped and fixed mainly by the threaded engagement between the nut 23 and the threaded segment 34. However, during an earthquake, the vibration may cause the threaded engagement between the two to loosen, so that the rotors 21 are not tightly engaged with each other and may rotate. Due to the existence of the rotor 21 structure, the screw 3 can rotate coaxially or non-coaxially under the condition of a certain elastic deformation to eliminate the misalignment between the segments.

[0028] Specifically, the rod-shaped structure 2112, the spacing boss 2111 and the cylindrical structure are an integrated structure, which improves the structural stability.

[0029] Specifically, adjacent cylindrical structures are engaged with each other via step surfaces 212 to increase the contact surface, thereby increasing the rotational stability.

[0030] Specifically, the edge of the nut segment 32 is a regular polygon, which is convenient for wrench construction.

[0031] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A rigid-flexible plug-in shield tunnel joint structure, characterized in that: It comprises a socket-and-spigot structure (1), a rotor assembly (2), a screw (3), an embedded part 1 (4) and an embedded part 2 (5); The second embedded part (5) is used to be arranged on the connection side of a pipe segment; The embedded part 1 (4) has a mounting circular groove (6), and the embedded part 1 (4) is used to be arranged on the connection side of another adjacent pipe segment; One end of the screw rod (3) is connected to the second embedded part (5) via the socket-type structure (1), and the other end of the screw rod (3) is movably connected to the inner wall of the mounting circular groove (6) via the rotor assembly (2).

2. A rigid-flexible plug-in shield tunnel joint structure according to claim 1, characterized in that: Along the axial direction of the second embedded part (5), the screw rod (3) comprises an insertion section (31), a nut section (32), a sleeve section (33) and a threaded section (34) which are connected in sequence; The rotor assembly (2) comprises a plurality of rotors (21) and a plurality of rotational connections (22) corresponding one to the rotors (21); Each of the rotors (21) is rotatably mounted on the sleeve section (33), each of the rotors (21) has a rotationally mounted portion (211), one side of each of the rotationally mounted components (22) is rotationally connected to the corresponding rotationally mounted portion (211), and the other side of each of the rotationally mounted components (22) is rotationally mounted on the inner wall of the mounting circular groove (6); The screw rod (3) further comprises a nut (23) threadably sleeved on the threaded section (34).

3. A rigid-flexible plug-in shield tunnel joint structure according to claim 2, characterized in that: The rotor (21) is a cylindrical structure rotatably sleeved on the sleeve section (33).

4. A rigid-flexible plug-in shield tunnel joint structure according to claim 3, characterized in that: The screw-on portion (211) is a rod-shaped structure (2112) fixed to the surface of the cylindrical structure via a spacing boss (2111).

5. A rigid-flexible plug-in shield tunnel joint structure according to claim 4, characterized in that: The inner wall of the mounting circular groove (6) is provided with a protrusion (61) with a rotating hole at a position corresponding to the rotating joint (22); The rotating joint (22) comprises a rotating rod (221) rotatably embedded in the rotating hole (611) of the rotating hole protrusion (61), and two connecting plates (222) formed by extending from both ends of the rotating rod (221) in a direction perpendicular to the axis thereof, the two connecting plates (222) also being rotatably sleeved on both ends of the rod-shaped structure (2112) through sleeve holes (223).

6. A rigid-flexible plug-in shield tunnel joint structure according to claim 4, characterized in that: The rod-shaped structure (2112), the spacing boss (2111) and the cylindrical structure are an integrated structure.

7. The rigid-flexible plug-in shield tunnel joint structure according to claim 3 is characterized in that: Adjacent cylindrical structures are engaged with each other via step surfaces (212).

8. The rigid-flexible plug-in shield tunnel joint structure according to claim 2, characterized in that: The edge of the nut segment (32) is in the shape of a regular polygon.

9. The rigid-flexible plug-in shield tunnel joint structure according to claim 2, characterized in that: An extrusion ring protrusion (35) is provided at one end of the sleeve section (33) close to the nut section (32).

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