Joint assembly and shield ring assembly

Abstract

The application relates to the technical field of tunnel engineering and discloses a joint assembly and a shield ring assembly, the joint assembly is applied to shield tunnel engineering and is used for connecting two adjacent shield rings, the joint assembly comprises a mounting seat and a connecting rod, the mounting seat is used for connecting one of the two adjacent shield rings, one end of the connecting rod is connected with the mounting seat, the other end of the connecting rod is connected with the other one of the two adjacent shield rings, the connecting rod is movably arranged along the ring direction of the shield ring relative to the mounting seat, so that the waterproof sealing gasket between two shield segments in the same shield ring can be compressed, the waterproof performance of the joint assembly is effectively guaranteed, the waterproof requirement of the shield tunnel under high water pressure can be met, and the application range of the plug-in joint is improved.

Description

Technical Field

[0001] This invention relates to the field of tunnel engineering technology, and in particular to a joint assembly and a shield ring assembly. Background Technology

[0002] The connection between shield tunnel segments includes the circumferential connection of segments within the same ring and the connection of segments between adjacent rings along the shield direction (tunnel travel direction).

[0003] For the connection between shield tunneling rings along the shield tunneling direction, insert-type joints are currently used. The principle of this insert-type joint is as follows: the connector is fixed on the shield tunneling segment to be assembled, and a structure for cooperating with the connector is set on the assembled segment. The connector is pre-installed inside the segment. At the segment assembly site, the connector and the cooperating structure are simply aligned and inserted for connection. The above assembly process has high assembly efficiency and can save assembly time. The positions of the shield tunnel segments to be assembled and the adjacent assembled shield tunnel segments within the same shield ring are determined during assembly. That is, the relative positions between the two segments within the same ring during assembly correspond to the positions where the waterproof gaskets between them have been compressed. Therefore, the waterproof gaskets between the two segments are compressed during the assembly process. Due to factors such as the relative movement between the two segments during assembly and assembly angle errors, the compression force during assembly can easily cause the gaskets to detach from the grooves of the segments. Excessive compression force can even cause the gaskets to tear. The compression height of the waterproof gaskets is limited, and the waterproof performance is affected, failing to meet the waterproof requirements of shield tunnels under high water pressure conditions, thus limiting the application range of the aforementioned insert joints. Summary of the Invention

[0004] The main objective of this invention is to provide a joint assembly designed to reduce the impact on the waterproof sealing gasket between shield segments within the shield ring.

[0005] To achieve the above objectives, the joint assembly proposed in this invention is applied to shield tunnel engineering and used to connect two adjacent shield rings. The joint assembly includes:

[0006] Mounting bracket for connecting one of the two adjacent shield rings; and

[0007] A connecting rod, one end of which is connected to the mounting base, and the other end of which is connected to one of two adjacent shield rings. The connecting rod is movable relative to the mounting base along the circumferential direction of the shield ring so as to compress the waterproof sealing gasket between two shield segments in the same shield ring.

[0008] Optionally, the mounting base includes a housing and a movable base, the housing having a movable mounting cavity and a limiting hole;

[0009] The limiting hole penetrates one side wall of the housing and connects to the movable mounting cavity. The movable seat is disposed in the movable mounting cavity and is movably connected to the cavity wall of the movable mounting cavity. The connecting rod is disposed in the movable seat and extends from the limiting hole to the outside of the housing.

[0010] Optionally, the movable seat is tumbled to the wall of the movable mounting cavity.

[0011] Optionally, the mounting base further includes ball bearings, and the cavity wall of the movable mounting cavity is formed with a first limiting groove extending in a first direction;

[0012] The ball bearing is disposed in the first limiting groove, and the outer wall of the movable seat is in rolling connection with the ball bearing.

[0013] Optionally, the outer wall of the movable seat is formed with a second limiting groove extending along a second direction, the ball is located in the second limiting groove, the second direction is set at an angle to the first direction, and the plane containing the first direction and the second direction is set at an angle to the extension direction of the connecting rod.

[0014] Optionally, the mounting base includes at least two balls; the movable mounting cavity has at least one first limiting groove formed on each of its two opposing cavity walls in the first direction, and the movable base has at least one second limiting groove formed on each of its two outer walls opposite to the cavity wall with the first limiting groove, each second limiting groove corresponding to one first limiting groove, and each ball corresponding to both a first limiting groove and a second limiting groove.

[0015] Optionally, at least one cavity wall of the movable mounting cavity is provided with two of the first limiting grooves.

[0016] Optionally, the connecting rod is detachably connected to the mounting base.

[0017] The present invention also proposes a shield tunneling ring assembly, comprising:

[0018] At least two shield rings are connected sequentially along the axial direction. Each shield ring includes multiple circumferentially connected shield segments, and each shield segment has a connecting hole at one end along the axial direction of the shield ring; and

[0019] The aforementioned joint assemblies are provided at one other end of the shield segment along the axial direction of the shield ring. The connecting rod of the joint assembly extends along the axial direction of the shield ring. The joint assembly of each shield segment in the shield ring is connected to the connecting hole of the shield segment in the adjacent shield ring.

[0020] Optionally, each of the shield tunnel segments is provided with at least two joint assemblies and connecting holes spaced circumferentially along the shield ring, the joint assemblies and the connecting holes being respectively located at both ends of the shield tunnel segment in the axial direction of the shield ring.

[0021] In the technical solution of this invention, one of two adjacent shield rings is connected by a mounting base. When installing the other shield ring, the end of the connecting rod away from the mounting base can be connected to the other shield ring first. Since the connecting rod can move relative to the shield ring in the circumferential direction of the shield ring, the waterproof sealing gasket between the two shield segments inside the ring will not be compressed when the connecting rod is connected to the shield ring. After the connecting rod is connected to the shield ring, the shield segment inside the shield ring where the mounting base is located is moved along the circumferential direction of the shield ring and the waterproof sealing gasket is compressed. The above-mentioned on-site assembly process is simple and the waterproof sealing gasket will not be detached from the groove or even torn due to the relative movement between the two shield segments during the assembly process. This reduces the impact on the waterproof sealing gasket between the shield segments inside the shield ring, effectively ensuring the waterproof performance and meeting the waterproof requirements of shield tunnels under high water pressure. This also improves the application range of the insertion joint. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a structure of an embodiment of the connector assembly provided by the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of the structural breakdown of the embodiment;

[0025] Figure 3 This is a first installation schematic diagram of an embodiment of the shield tunneling ring assembly provided by the present invention;

[0026] Figure 4 for Figure 3 The second installation diagram of the embodiment is shown in the figure.

[0027] Explanation of icon numbers:

[0028]

[0029]

[0030] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0034] This invention proposes a connector assembly 200. Figures 1 to 2 This is one embodiment of the present invention.

[0035] In an embodiment of the present invention, the connector assembly 200 is as follows: Figures 1 to 2 As shown, the joint assembly 200, applied in shield tunnel engineering and used to connect two adjacent shield rings 100, includes a mounting base 1 and a connecting rod 2. The mounting base 1 is used to connect one of the two adjacent shield rings 100. One end of the connecting rod 2 is connected to the mounting base 1, and the other end of the connecting rod 2 is connected to the other of the two adjacent shield rings 100. The connecting rod 2 is movable relative to the mounting base 1 along the circumferential direction of the shield ring 100 so as to compress the waterproof sealing gasket a between two shield segments 101 in the same shield ring 100.

[0036] In the technical solution of this invention, one of two adjacent shield rings 100 is connected by the mounting base 1. When installing the other shield ring 100, the end of the connecting rod 2 away from the mounting base 1 can be connected to the other shield ring 100 first. Since the connecting rod 2 can move relative to the shield ring 100 in the circumferential direction of the shield ring 100, the connection of the connecting rod 2 to the shield ring 100 will not compress the waterproof sealing gasket a between the two shield segments 101 inside the ring. After the connecting rod 2 is connected to the shield ring 100, the connection is then made along the shield... The circumferential moving mounting seat 1 of the ring 100 is located in the shield segment 101 within the shield ring 100 and compresses the waterproof sealing gasket a. The above-mentioned on-site assembly process is simple and the waterproof sealing gasket a will not be detached from the trench or even torn due to the relative movement between the two shield segments 101 during the assembly process. This reduces the impact on the waterproof sealing gasket a between the shield segments 101 within the shield ring 100, effectively ensuring the waterproof performance. It can meet the waterproof requirements of shield tunnels under high water pressure and improve the application range of the insertion joint.

[0037] The movable connection between the connecting rod 2 and the mounting base 1 can also accommodate errors in various aspects such as the fabrication of the shield tunnel segment 101, the installation of the joint assembly 200 on the shield tunnel segment 101, and the assembly of the shield tunnel segment 101.

[0038] To specifically realize the movable connection between the connecting rod 2 and the mounting base 1, in one embodiment, the mounting base 1 includes a housing 11 and a movable base 12. The housing 11 forms a movable mounting cavity 111 and a limiting hole 112. The limiting hole 112 penetrates one side wall of the housing 11 and communicates with the movable mounting cavity 111, that is, the movable mounting cavity 111 inside the housing 11 communicates with the space outside the housing 11. The movable base 12 is disposed in the movable mounting cavity 111 and is movably connected to the cavity wall of the movable mounting cavity 111. The connecting rod 2 is disposed in the movable base 12 and extends from the limiting hole 112 to the outside of the housing 11. The connecting rod 2 and the movable base 12 move together. The movable base 12 uses the cavity wall of the movable mounting cavity 111 to limit the range of motion and prevent the combination of the connecting rod 2 and the movable base 12 from coming out of the housing 11.

[0039] In this embodiment, the housing 11 includes two end plates 114. The two end plates 114 and the housing 11 portion with the limiting hole 112 surround each other to form the movable mounting cavity 111. The end plates 114 are detachably connected to other parts of the housing 11 so that the movable seat 12 can be installed into the housing 11 in the initial stage of installation.

[0040] The wall of the limiting hole 112 encloses and defines an area for the connecting rod 2 to move. The shape of the limiting hole 112 is not limited, but the length of any line segment passing through the center of the limiting hole 112 and intersecting the wall of the limiting hole 112 must be greater than the outer diameter of the connecting rod 2, so that the connecting rod 2 can move arbitrarily radially within the area enclosed by the wall of the limiting hole 112. In this embodiment, the limiting hole 112 is elliptical in shape, with the major axis along the tangent direction of the shield ring 100 and the minor axis along the radial direction of the shield ring 100. This provides a larger travel range for the shield segment 101 to compress the waterproof sealing gasket a as it moves circumferentially along the shield ring 100 during actual assembly. The movable space provided by the limiting hole 112 in the radial direction of the shield ring 100 accommodates the radial movement component of the shield segment 101 when it moves circumferentially along the shield ring 100.

[0041] To reduce wear between the movable seat 12 and the cavity wall of the movable mounting cavity 111, in one embodiment, the movable seat 12 and the cavity wall of the movable mounting cavity 111 are connected by rolling friction, so as to reduce wear between the movable seat 12 and the cavity wall of the movable mounting cavity 111.

[0042] The rolling connection between the movable seat 12 and the cavity wall of the movable mounting cavity 111 is not limited. In this embodiment, the mounting seat 1 further includes a ball bearing 13. The cavity wall of the movable mounting cavity 111 is formed with a first limiting groove 113 extending in a first direction. The ball bearing 13 is disposed in the first limiting groove 113. The outer wall of the movable seat 12 is in rolling connection with the ball bearing 13. The first limiting groove 113 is used to limit the ball bearing 13 within it, so as to a certain extent prevent the ball bearing 13 from getting stuck in the corner between the movable seat 12 and the movable mounting cavity 111 when the movable seat 12 moves relative to the movable mounting cavity 111, which would affect the travel range of the movable seat 12. The ball bearing 13 should preferably be made of a high-strength material, such as Q235 steel, to avoid breakage during use.

[0043] To further define the position of the ball 13 between the movable seat 12 and the cavity wall of the movable mounting cavity 111, in one embodiment, the outer wall of the movable seat 12 is formed with a second limiting groove 121 extending in a second direction. The ball 13 is located in the second limiting groove 121, specifically in both the first limiting groove 113 and the second limiting groove 121, so as to completely prevent the ball 13 from being driven to a corner by the cavity wall of the movable mounting cavity 111. The first direction and the second direction are set at an angle, with the optimal angle being 90°. The first direction is the circumferential direction of the shield ring 100. When focusing on a point or area on the shield segment 101, it can be abstracted as the tangential direction of the shield ring 100. In this embodiment, it can be understood as focusing on the area where the joint assembly 200 is set on the shield segment 101. Therefore, the first direction can also be considered as the tangential direction of the shield ring 100 in this area. The second direction is the radial direction of the shield ring 100. The extension direction of the connecting rod 2 is the axial direction of the shield ring 100. That is, the plane containing the first direction and the second direction is perpendicular to the extension direction of the connecting rod 2. Perpendicularity is the optimal situation. Errors caused during actual production and assembly may result in a small deviation in the angle, which is within an implementable range. The length of the first limiting groove 113 is greater than the stroke length of the connecting rod 2 in the first direction, and the length of the second limiting groove 121 is greater than the stroke length of the connecting rod 2 in the second direction to ensure the rolling range of the steel ball. Figure 2 and Figure 3 As shown, x is the first direction (circumferential direction of the shield ring 100), y is the second direction (radial direction of the shield ring 100), and z is the extension direction of the connecting rod 2 (axial direction of the shield ring 100).

[0044] To improve the smoothness of the relative movement between the movable seat 12 and the cavity wall of the movable mounting cavity 111, in one embodiment, the mounting seat 1 includes at least two balls 13; the two opposite cavity walls of the movable mounting cavity 111 in the first direction each form at least one first limiting groove 113, and the two outer walls of the movable seat 12 opposite to the cavity wall with the first limiting groove 113 each form at least one second limiting groove 121. Each second limiting groove 121 corresponds to one first limiting groove 113, and one ball 13 is simultaneously disposed in one first limiting groove 113 and one second limiting groove 121. That is, in the first direction, the two outer walls of the movable seat 12 are respectively connected to the two cavity walls of the movable mounting cavity 111 by the rolling connection of the balls 13, avoiding the occurrence of severe wear on one side, and also making the relative movement between the movable seat 12 and the cavity wall of the movable mounting cavity 111 smoother.

[0045] To further improve the stability of the relative movement between the movable seat 12 and the cavity wall of the movable mounting cavity 111, in one embodiment, at least one cavity wall of the movable mounting cavity 111 is provided with two first limiting grooves 113, while the side wall of the movable seat 12 opposite to the cavity wall is provided with two second limiting grooves 121. One first limiting groove 113 and one second limiting groove 121 correspond to each other, making the relative movement between the movable seat 12 and the cavity wall of the movable mounting cavity 111 more stable. In this embodiment, one of the two cavity walls of the movable mounting cavity 111 in the first direction is provided with one first limiting groove 113, and the other is provided with two first limiting grooves 113. Furthermore, in the cross-section in the first direction, the three first limiting grooves 113 form an isosceles triangle, making the movement of the movable seat 12 more stable and further preventing the four side ends of the movable seat 12 in the first direction from sliding and rubbing against the cavity wall of the movable mounting cavity 111 due to inclination.

[0046] The assembly sequence of the connector assembly 200 is as follows: the movable seat 12 is installed into the housing 11, and then the two end caps are assembled with the other parts of the housing 11 to form the movable mounting cavity 111. To facilitate the assembly of the connecting rod 2 onto the mounting seat 1, in one embodiment, the connecting rod 2 is detachably connected to the mounting seat 1, specifically to the movable seat 12. Therefore, during assembly, after the movable seat 12 is installed, the connecting rod 2 can be passed through the limiting hole 112 to the inside of the housing 11 and connected to the movable seat 12. This optimizes the assembly steps. If the connecting rod 2 is integrally formed with the mounting seat 1, the housing 11 would need to have a detachable sidewall opposite the limiting hole 112, and the connecting rod 2 would need to be inserted into the housing 11 from one side of the sidewall and then out through the limiting hole 112, adding extra steps to the assembly process. The detachable connection method between the connecting rod 2 and the mounting base 1 is not specifically limited; it can be a snap-fit ​​structure with locking mechanism, etc. In this embodiment, the connecting rod 2 has a threaded rod segment 21, and the movable base 12 has a threaded hole 122 formed on the outer wall facing the limiting hole 112. The connecting rod 2 is threadedly connected to the threaded hole 122 through the threaded rod segment 21, so that the connecting rod 2 is assembled to the movable base 12. Furthermore, the threaded hole 122 and the threaded rod segment 21 are simply machined without other complex connection structures, simplifying the production process.

[0047] The present invention also proposes a shield tunneling ring assembly 1000, such as Figure 3 and Figure 4As shown, the shield ring assembly 1000 includes at least two shield rings 100 and a plurality of joint assemblies 200. The shield rings 100 are connected sequentially along the axial direction. Each shield ring 100 includes a plurality of circumferentially connected shield segments 101. Each shield segment 101 has a connecting hole 102 at one end of the shield ring 100 along the axial direction. Each joint assembly 200 is located at the other end of the shield segment 101 along the axial direction of the shield ring 100. The connecting rod 2 of the joint assembly 200 extends along the axial direction of the shield ring 100. The joint assembly 200 of the shield segment 101 in each shield ring 100 is connected to the connecting hole 102 of the shield segment 101 in the adjacent shield ring 100. That is, one end of each shield ring 100 having the joint assembly 200 in the axial direction is used to connect to the end of the adjacent shield ring 100 having the connection hole 102, and the end of each shield ring 100 having the connection hole 102 in the axial direction is used to connect to the end of another adjacent shield ring 100 having the joint assembly 200.

[0048] When installing an adjacent shield ring 100 on an already assembled shield ring 100 within the shield ring assembly 1000, the end of the connecting rod 2 furthest from the mounting base 1 can be connected to the other shield ring 100 first. Since the connecting rod 2 can move relative to the shield ring 100 in the circumferential direction of the shield ring 100, connecting the connecting rod 2 to the shield ring 100 will not compress the waterproof sealing gasket a between the two shield segments 101 inside the ring. After the connecting rod 2 is connected to the shield ring 100, the connection can be made along the shield ring 100. The circumferential moving mounting seat 1 of 00 is located in the shield ring 100 and compresses the waterproof sealing gasket a. The above-mentioned on-site assembly process is simple and the waterproof sealing gasket a will not be detached from the trench or even torn due to the relative movement between the two shield segments 101 during the assembly process. This reduces the impact on the waterproof sealing gasket a between the shield segments 101 in the shield ring 100, and the waterproof performance is effectively guaranteed. It can meet the waterproof requirements of shield tunnels under high water pressure and improve the application range of the insertion joint.

[0049] Figure 3 This is a schematic diagram showing the connection position of the shield segment 101 between two adjacent shield rings 100 during the assembly process. Figure 4 This is a schematic diagram of the waterproof sealing gasket a being squeezed between the two shield tunnel segments 101 after assembly.

[0050] The specific structure of the joint assembly 200 is as described in the above embodiments. Since the shield ring assembly 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0051] To improve the connection strength between two adjacent shield rings 100, in one embodiment, each shield segment 101 is provided with at least two joint assemblies 200 and connecting holes 102 spaced circumferentially along the shield ring 100. The joint assemblies 200 and the connecting holes 102 are respectively located at both ends of the shield segment 101 in the axial direction of the shield ring 100. That is, two adjacent shield rings 100 connected shield segments 101 are connected by at least two sets of joint assemblies 200 and connecting holes 102 to improve the connection strength between two adjacent shield rings 100 connected shield segments 101. Since the joint assemblies 200 and connecting holes 102 account for a very small volume in the shield segment 101, even if a large number are provided, it will not have a significant impact on the strength of the shield segment 101. In this embodiment, each shield segment 101 is provided with three joint assemblies 200 and connecting holes 102.

[0052] The joint assembly 200 is fixed inside the shield tunnel segment 101 by anchoring steel bars to prevent relative movement between it and the shield tunnel segment 101, which would affect the overall structural stability.

[0053] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A joint assembly, applied in shield tunnel engineering and used to connect two adjacent shield rings, characterized in that, The connector assembly includes: Mounting bracket for connecting one of the two adjacent shield rings; and A connecting rod, one end of which is connected to the mounting base, and the other end of which is connected to one of two adjacent shield rings. The connecting rod is movable relative to the mounting base along the circumferential direction of the shield ring so as to compress the waterproof sealing gasket between two shield segments in the same shield ring. The mounting base includes a housing and a movable base, wherein the housing has a movable mounting cavity and a limiting hole; The limiting hole penetrates one side wall of the housing and communicates with the movable mounting cavity. The movable seat is disposed in the movable mounting cavity and is rotatably connected to the cavity wall of the movable mounting cavity. The connecting rod is disposed in the movable seat and extends from the limiting hole to the outside of the housing. The mounting base also includes a ball bearing, and the cavity wall of the movable mounting cavity is formed with a first limiting groove extending in a first direction; the ball bearing is disposed in the first limiting groove, and the outer wall of the movable base is in rolling connection with the ball bearing; The outer wall of the movable seat is formed with a second limiting groove extending in a second direction. The ball is located in the second limiting groove. The second direction is set at an angle to the first direction, and the plane containing the first direction and the second direction is set at an angle to the extension direction of the connecting rod. The mounting base includes at least two balls; the movable mounting cavity has at least one first limiting groove formed on each of its two opposite cavity walls in the first direction, and the movable base has at least one second limiting groove formed on each of its two outer walls opposite to the cavity wall with the first limiting groove, each second limiting groove corresponding to one first limiting groove, and each ball being simultaneously disposed in one first limiting groove and one second limiting groove.

2. The connector assembly as claimed in claim 1, characterized in that, At least one of the cavity walls of the movable mounting cavity is provided with two of the first limiting grooves.

3. The connector assembly as described in claim 1 or 2, characterized in that, The connecting rod is detachably connected to the mounting base.

4. A shield tunneling ring assembly, characterized in that, include: At least two shield rings are connected sequentially along the axial direction. Each shield ring includes multiple circumferentially connected shield segments, and each shield segment has a connecting hole at one end along the axial direction of the shield ring; and Multiple joint assemblies as described in any one of claims 1 to 3, each joint assembly being disposed at one other end of the shield segment in the axial direction of the shield ring, the connecting rod of the joint assembly extending along the axial direction of the shield ring, and the joint assembly of the shield segment in each shield ring being connected to the connecting hole of the shield segment in the adjacent shield ring.

5. The shield ring assembly as described in claim 4, characterized in that, Each of the shield tunnel segments is provided with at least two joint assemblies and connecting holes spaced circumferentially along the shield ring, and the joint assemblies and connecting holes are respectively located at both ends of the shield tunnel segment in the axial direction of the shield ring.

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