A rigid-flexible socket-and-spigot shield tunnel joint structure

Abstract

The present invention relates to the technical field of shield tunnels and discloses a rigid-flexible socket-type shield tunnel joint structure, comprising a socket-type structure, a rotor assembly, a screw, an embedded part one and an embedded part two; the embedded part one and the embedded part two of the present invention are respectively embedded in adjacent pipe segments, and the embedded parts can fully exert the functions of bolts and steel bars, thereby improving the overall bearing capacity of the bolts; one end of the screw is inserted, and the joint is introduced into the rotor assembly, thereby reducing the sensitivity of the inter-ring joint to structural manufacturing and assembly errors; the screw can be tightened to ensure the shear stiffness of the joint; through optimized design, the screw can be loosened after the shear force of the joint reaches a certain value, thereby reducing the stiffness of the joint, realizing the "rigid-flexible" state change under more extreme conditions during operation, and improving the adaptability of the joint structure to extreme conditions; by re-tightening the bolt rod at a later time, the stiffness of the joint structure can be restored, and the repairability of the joint can be achieved.

Description

Technical Field

[0001] The present 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 excavated using a shield machine and lined by installing segments. Segments are categorized by material, including reinforced concrete, steel, cast iron, steel fiber reinforced concrete, and composite materials. Adjacent segments are connected by joints.

[0003] Compared to the segments and the body, joints have lower structural stiffness and strength, making them a relatively weak point in shield tunnel structures. Full-scale test results and investigations into actual projects have shown that structural failures most often occur at tunnel joints. As a critical component of shield tunnel structures, the mechanical and performance characteristics of joints significantly impact those of the entire lining.

[0004] Domestic shield tunnel linings basically use bolts as connectors. The use of bolt connection has certain limitations, such as: (1) Bolt connection requires extremely high segment assembly accuracy. At the same time, the installation of bolts is done manually. When there are large errors in the production of segments and bolts, or in the assembly of segments, bolt installation becomes difficult. In addition, violent assembly often causes initial stress in the segments, which has an adverse effect on the quality of the segment forming. (2) The setting of bolt hand holes weakens the segment cross section, making the segments near the hand holes prone to cracking or damage. (3) Bolts, steel bars and other structures are in an elastic state during the load-bearing process of the inter-ring joint. The strength of the material itself is not fully exerted, and only 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:

[0007] A rigid-flexible plug-in shield tunnel joint structure, comprising a socket-and-spigot structure, a rotor assembly, a screw, a first embedded part, and a second embedded part;

[0008] The second embedded part is used to be arranged on the connection side of a pipe segment;

[0009] The embedded part 1 has a mounting circular groove, and the embedded part 1 is used to be arranged on the connection side of another adjacent pipe segment;

[0010] 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.

[0011] Preferably, along the axial direction of the embedded part 2, the screw comprises an insertion section, a nut section, a sleeve section and a threaded section connected in sequence;

[0012] The rotor assembly includes a plurality of rotating parts and a plurality of rotating parts corresponding to the rotating parts;

[0013] Each of the rotating members is rotatably mounted on the sleeve section, and each of the rotating members has a rotating mounting portion. One side of each of the rotating members is rotatably connected to the corresponding rotating mounting portion, and the other side of each of the rotating members is rotatably mounted on the inner wall of the mounting circular groove.

[0014] The screw rod further comprises a nut threadably sleeved on the threaded section.

[0015] Preferably, the rotating member is a cylindrical structure rotatably sleeved on the sleeve section.

[0016] Preferably, the screw-on portion is a rod-shaped structure fixed to the surface of the cylindrical structure via a spacer boss.

[0017] Preferably, the inner wall of the mounting circular groove has a protrusion with a rotating hole at a position corresponding to the rotating connector;

[0018] The rotating joint includes a rotating rod rotatably embedded in the rotating hole with the rotating hole protrusion and two connecting plates formed by extending from both ends of the rotating rod in a direction perpendicular to its own axis. The two connecting plates are also rotatably sleeved on both ends of the rod-shaped structure through sleeve holes.

[0019] Preferably, the rod-shaped structure, the spacing boss and the cylindrical structure are an integrated structure.

[0020] Preferably, adjacent cylindrical structures are engaged with each other via stepped surfaces.

[0021] Preferably, the edge of the nut segment is a regular polygon.

[0022] Preferably, an extrusion ring protrusion is provided at one end of the sleeve section close to the nut section.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The embedded parts 1 and 2 of the present invention are respectively embedded in adjacent pipe segments. Through the form of embedded parts, the functions of bolts and steel bars are fully utilized 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, which reduces 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, it can be achieved that after the shear force of the joint reaches a certain value, the tightening of the screw rod is loosened, so that the stiffness of the joint is reduced, and the "rigid-flexible" state change under more extreme conditions during operation is achieved, thereby improving the adaptability of the joint structure to extreme conditions; by re-tightening the bolt rod 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

[0025] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0026] Figure 1 Schematic diagram of the installation of the rotor assembly of the present invention;

[0027] Figure 2 Schematic diagram of the exploded structure of the rotor assembly and embedded part 1 of the present invention;

[0028] Figure 3 Schematic diagram of the exploded structure of the rotor assembly and the screw of the present invention;

[0029] Figure 4 This is a longitudinal section of the screw rod of the present invention installed between embedded part 1 and embedded part 2.

[0030] In the picture:

[0031] 1. Socket-and-spigot structure; 2. Rotor assembly; 3. Screw; 4. Embedded part 1; 5. Embedded part 2; 6. Mounting groove; 61. Protrusion with rotary hole; 611. Rotary hole;

[0032] 21. Rotor; 211. Rotary assembly; 2111. Spacer boss; 2112. Rod-shaped structure; 212. Stepped surface; 22. Rotary connector; 221. Rotating rod; 222. Connecting plate; 223. Hole; 23. Nut;

[0033] 31. Insertion section; 32. Nut section; 33. Socket section; 34. Threaded section; 35. Extrusion ring convex. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0035] The following first describes the concepts involved in this application with reference to the accompanying drawings. It should be noted that the following description of each concept is intended only to make the content of this application easier to understand and does not limit the scope of protection of this application. At the same time, the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The following detailed description of this application will be made with reference to the accompanying drawings and in conjunction with the embodiments.

[0036] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] 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 1 4 and an embedded part 2 5; the embedded part 2 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 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.

[0039] The working principle of the present invention is:

[0040] 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 joint stiffness and performing as a flexible joint, reducing the damage to the structure under earthquake action and improving the seismic performance of the structure; it is convenient for further repair of the joint in the later stage, can restore the joint stiffness, reduce the misalignment of the inter-ring joint, and improve the toughness of the tunnel structure.

[0041] In some embodiments, along the axial direction of the embedded component 2 5 , the screw rod 3 includes an insertion section 31, a nut section 32, a sleeve section 33, and a threaded section 34, which are sequentially connected. The rotor assembly 2 includes multiple rotors 21 and multiple corresponding screw-on components 22. Each rotor 21 is rotatably mounted on the sleeve section 33. Each rotor 21 has a screw-on portion 211. One side of each screw-on component 22 is rotatably connected to the corresponding screw-on portion 211, and the other side of each screw-on component 22 is rotatably mounted on the inner wall of the mounting groove 6. The screw rod 3 also includes a nut 23 that is threadably mounted on the threaded section 34. The rotor 21 is a cylindrical structure that is rotatably mounted on the sleeve section 33. The screw-on portion 211 is a rod-shaped structure 2112 fixed to the surface of the cylindrical structure via a spacer 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 rotating joint 22; the rotating joint 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. The two connecting plates 222 are also rotatably sleeved on the two ends of the rod-shaped structure 2112 through the 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.

[0042] In the above embodiment, the specific working principle of the rotor assembly 2 is as follows:

[0043] First, the rotary joint 22 is pre-installed one-to-one with the protrusion 61 with a rotating hole on the mounting circular groove 6 of the embedded part 4, and the rotary joint 22 is formed by combining two connecting plates 222 and the rotating rod 221 to clamp the two ends of the protrusion 61 with a rotating hole, so that the connecting plates 222 are used to form the positioning of the rotating rod 221, and better rotation stability can be obtained. The rotor 21 can be pre-installed one-to-one on the rotary joint 22 through the rotary mounting portion 211. The shape matching of the rotary mounting portion 211 and the connecting plate 222 is also to play a role in preventing rotation from falling off and improving rotation 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 tail of the last rotor 21. 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.

[0044] Then, coaxially insert the screw rod 3 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, use a tool such as a wrench to turn the nut section 32 to gradually rotate the screw rod 3. At this time, since the nut 23 is fixed to the rotor 21, the nut 23 and the screw rod 3 rotate relative to each other, so that the nut 23 is gradually screwed in until the extrusion ring 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.

[0045] 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. This embodiment only shows one of its specific shapes as an 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. No specific restrictions are made in the present invention.

[0046] Since the above structure mainly achieves clamping and fixing through the threaded engagement between the nut 23 and the threaded segment 34, during an earthquake, the vibration will cause the threaded engagement between the two to loosen, so that the engagement between the rotors 21 and 21 is not tight and rotation may occur. 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 pipe segments.

[0047] Specifically, the rod-shaped structure 2112, the spacing boss 2111 and the cylindrical structure are an integrated structure, which improves structural stability.

[0048] Specifically, adjacent cylindrical structures engage with each other through the stepped surfaces 212 to increase the contact surface and thus increase the rotational stability.

[0049] Specifically, the edge of the nut segment 32 is a regular polygon, which is convenient for wrench construction.

[0050] 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 do not impose any form of limitation on the implementation methods of the technology of the present invention. Any person skilled in the art 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.

[0051] 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 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, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of this application, they can also make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution 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 by: It includes 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 embedded part 2 (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) through the socket structure (1), and the other end of the screw rod (3) is movably connected to the inner wall of the mounting circular groove (6) through the rotor assembly (2); Along the axial direction of the embedded part 2 (5), 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) comprises a plurality of rotors (21) and a plurality of rotating joints (22) corresponding thereto one by one; Each of the rotors (21) is rotatably mounted on the sleeve section (33), and 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) threadedly sleeved on the threaded section (34).

2. A rigid-flexible plug-in shield tunnel joint structure according to claim 1, characterized in that: The rotor (21) is a cylindrical structure rotatably sleeved on the sleeve section (33).

3. The rigid-flexible plug-in shield tunnel joint structure according to claim 2, characterized in that: The screw-on portion (211) is a rod-shaped structure (2112) fixed to the surface of the cylindrical structure via a spacer boss (2111).

4. The rigid-flexible plug-in shield tunnel joint structure according to claim 3, 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, and the two connecting plates (222) are further rotatably sleeved on both ends of the rod-shaped structure (2112) through sleeve holes (223).

5. The rigid-flexible plug-in shield tunnel joint structure according to claim 3, characterized in that: The rod-shaped structure (2112), the spacing boss (2111) and the cylindrical structure are an integrated structure.

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

7. The rigid-flexible plug-in shield tunnel joint structure according to claim 1, characterized in that: The edge of the nut segment (32) is in the shape of a regular polygon.

8. The rigid-flexible plug-in shield tunnel joint structure according to claim 1, 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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