Shield steel sleeve

Abstract

The application relates to a shield steel sleeve, which comprises a cylinder body, a plurality of arc-shaped mounting blocks, first screws, second screws and a plurality of sealing elements. The cylinder body is provided with an open end and is used for receiving a shield machine. The plurality of arc-shaped mounting blocks are each provided with an arc-shaped groove which is embedded with the open end. The plurality of arc-shaped mounting blocks are connected with each other to form a continuous arc-shaped groove which is embedded with the open end. The two ends of each arc-shaped mounting block are provided with connecting lugs. Each arc-shaped mounting block is provided with a threaded hole which penetrates from the outer arc surface of the arc-shaped mounting block to the arc-shaped groove. The first screws are used for penetrating through the connecting lugs to connect the plurality of arc-shaped mounting blocks in the circumferential direction. The second screws are used for being locked into the threaded holes after the arc-shaped mounting blocks are embedded and assembled with the cylinder body to lock the plurality of arc-shaped mounting blocks and the cylinder body in the radial direction. The plurality of sealing elements are arranged between the cylinder body and the arc-shaped mounting blocks and also between adjacent arc-shaped mounting blocks. The shield steel sleeve is embedded and assembled in a sealed mode through the plurality of arc-shaped mounting blocks and the sealing elements, and is convenient to maintain.

Description

Technical Field

[0001] This application relates to tunnel boring technology, and in particular to a shield steel sleeve. Background Technology

[0002] The shield tunneling steel sleeve is a barrel-shaped structure with one open end. The overall shield tunneling steel sleeve structure consists of a transition ring, a cylinder, a rear end cover plate, a reaction frame, and front, rear, left, and right supports. In order to prevent the frozen solidified body from cracking and causing water and sand to flow out and cause ground collapse during the shield receiving process, it is necessary to ensure that the front end of the shield tunneling steel sleeve has good sealing performance after the tunnel portal is cleared.

[0003] Traditional shield tunneling steel sleeves are generally made of multiple arc-shaped steel plates welded together and assembled on the cylinder. These arc-shaped steel plates are fixed together by welding. The pre-embedded grouting pipe leads out to the water-stopping device on the outside of the transition ring of the steel sleeve to block mud and water during the shield's entry into the tunnel.

[0004] The front end of a traditional shield tunneling steel sleeve is usually composed of multiple arc-shaped steel plates welded together. If leakage occurs during use, maintenance will be quite troublesome, and welding multiple arc-shaped steel plates will also consume a lot of time. Summary of the Invention

[0005] To address the problems of traditional shield tunneling steel sleeves, such as difficulty in maintenance due to water leakage during use, and the time-consuming welding process of multiple curved steel plates, this application proposes a shield tunneling steel sleeve device.

[0006] To solve the above technical problems, this application provides a shield tunneling steel sleeve with the following technical solution: A shield tunneling steel sleeve is provided, the shield tunneling steel sleeve comprising:

[0007] A cylindrical body having an open end, the cylindrical body being used to receive a tunnel boring machine;

[0008] Multiple arc-shaped mounting blocks are provided, each with an arc-shaped groove that fits into the open end. The multiple arc-shaped mounting blocks are connected to each other to form a continuous arc-shaped groove that fits into the open end. Each arc-shaped mounting block has connecting ears at both ends and a threaded hole that extends from the outer arc surface of the arc-shaped mounting block to the arc-shaped groove.

[0009] A first screw is used to pass through the connecting lug to connect the plurality of the arc-shaped mounting blocks to each other in the circumferential direction;

[0010] The second screw is used to lock the multiple arc-shaped mounting blocks to the cylinder in the radial direction after the arc-shaped mounting blocks are fitted and assembled with the cylinder.

[0011] A plurality of seals are provided between the cylinder body and the arc-shaped mounting blocks, and are also provided between adjacent arc-shaped mounting blocks.

[0012] In a specific embodiment of the present application, the arc-shaped mounting block includes:

[0013] An arc-shaped end wall;

[0014] An outer arc-shaped wall, connected to the outer arc side of the arc-shaped end wall and provided with the threaded hole;

[0015] An inner arc-shaped wall, connected to the inner arc side of the arc-shaped end wall and spaced opposite to the outer arc-shaped wall;

[0016] Among them, the arc-shaped groove formed by enclosing the arc-shaped end wall, the outer arc-shaped wall, and the inner arc-shaped wall, and connecting ears are provided on the outer arc-shaped wall and / or the inner arc-shaped wall.

[0017] In a specific embodiment of the present application, fitting blocks and fitting grooves are respectively provided at both ends of the arc-shaped mounting block, and two adjacent arc-shaped mounting blocks form a fitting connection through the fitting blocks and the fitting grooves.

[0018] In a specific embodiment of the present application, the lengths of the fitting blocks and the fitting grooves are less than the thickness of the arc-shaped mounting block.

[0019] In a specific embodiment of the present application, the fitting blocks and the fitting grooves are provided corresponding to the outer arc-shaped wall and the inner arc-shaped wall.

[0020] In a specific embodiment of the present application, a concave step is provided on the end face where the arc-shaped mounting blocks are connected to each other. The plurality of seals include a "C"-shaped sealing strip, and the "C"-shaped sealing strip matches the concave step to form a seal between adjacent arc-shaped mounting blocks.

[0021] In a specific embodiment of the present application, the concave step includes a first step recessed from the outer surfaces of the outer arc-shaped wall and the inner arc-shaped wall, a second step recessed from the arc-shaped end wall, and a third step recessed from the inner end surfaces of the outer arc-shaped wall and the inner arc-shaped wall. The "C"-shaped sealing strip includes a first sealing portion, a second sealing portion and a third sealing portion connecting both ends of the first sealing portion. The first sealing portion is correspondingly embedded in the first step, the second sealing portion is correspondingly embedded in the second step, and the third sealing portion is correspondingly embedded in the third step.

[0022] In a specific embodiment of the present application, an arc-shaped sunk groove is further provided at the bottom of the arc-shaped groove. The plurality of seals include a buffer pad, and the buffer pad is fitted and arranged in the arc-shaped sunk groove.

[0023] In a specific embodiment of this application, the inner circumferential surface of the outer arc-shaped wall is further provided with a first arc-shaped groove, and the plurality of sealing elements include a first arc-shaped sealing sheet, wherein the first arc-shaped sealing sheet is fitted and matched in the first arc-shaped groove.

[0024] In one specific embodiment of this application, the inner circumferential surface of the inner arc-shaped wall is further provided with a second arc-shaped groove, and the plurality of sealing elements include a second arc-shaped sealing sheet, which is matched and fitted into the second arc-shaped groove.

[0025] The advantages of this application are:

[0026] 1. This application achieves the function of easily assembling and installing the arc-shaped mounting blocks on the open end of the cylinder through the structural design of the shield tunnel steel sleeve. It solves the problem that the maintenance process is more troublesome when water leakage occurs during the use of traditional shield tunnel steel sleeves, and that the welding of multiple arc-shaped steel plates during the installation of traditional shield tunnel steel sleeves consumes a lot of time.

[0027] 2. This application uses an arc-shaped mounting block assembly method. A first screw is assembled between two adjacent sets of connecting ears on the arc-shaped mounting block. The first screw passes through the two adjacent connecting ears to form a threaded connection, which is used to lock the adjacent arc-shaped mounting blocks in the circumferential direction. The end faces of the arc-shaped mounting blocks that connect with each other are provided with concave steps. The "U"-shaped sealing strip matches the concave steps to form a seal between the adjacent mounting blocks, which helps to increase the sealing performance between multiple arc-shaped mounting blocks.

[0028] 3. This application uses an arc-shaped mounting block assembly method. The two ends of the arc-shaped mounting block are respectively provided with a fitting groove and a fitting block. The length of the fitting groove and the fitting block is less than the thickness of the arc-shaped mounting block. The combination of the fitting groove and the fitting block enables the arc-shaped mounting blocks to be fitted and connected, which helps to increase the stability between multiple arc-shaped mounting blocks. After multiple arc-shaped mounting blocks are assembled, they are not easy to loosen.

[0029] 4. This application uses the design of a shield tunnel steel sleeve, in which the outer arc-shaped wall of the arc-shaped mounting block is provided with a threaded hole that extends to the arc-shaped groove. After the arc-shaped mounting block is assembled with the cylinder, the second screw is inserted into the threaded hole until it penetrates into the inside of the cylinder, locking the arc-shaped mounting block and the cylinder in the radial direction. This helps to increase the stability between the arc-shaped mounting block and the cylinder, and the arc-shaped mounting block and the cylinder are not prone to loosening.

[0030] 5. Through the design of the shield tunnel steel sleeve, the bottom of the arc groove of the arc mounting block is further provided with an arc-shaped sink groove, and the buffer pad is matched and fitted in the arc-shaped sink groove, which helps to reduce the friction generated between the arc end wall of the arc mounting block and the opening of the cylinder. At the same time, during operation and assembly, the buffer pad plays a buffering role between the arc mounting block and the cylinder.

[0031] 6. In the present application, through the design of the shield steel sleeve, the inner circumferential surface of the outer arc-shaped wall of the arc-shaped installation block with fast arc installation is further provided with a first arc-shaped groove, and the inner circumferential surface of the inner arc-shaped wall is further provided with a second arc-shaped groove. The first arc-shaped sealing piece and the second arc-shaped sealing piece are respectively and correspondingly fitted and arranged in the first arc-shaped groove and the second arc-shaped groove, which is beneficial to increasing the sealing performance between the arc-shaped groove and the cylinder body, and at the same time reducing the frictional loss between the arc-shaped installation block and the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0033] Figure 1 is a schematic three-dimensional structure diagram of the shield steel sleeve provided by the embodiment of the present application;

[0034] Figure 2 is Figure 1 a schematic three-dimensional structure diagram of a single arc-shaped installation block of the shield steel sleeve shown in ;

[0035] Figure 3 is Figure 1 a schematic diagram of the reverse view of multiple arc-shaped installation blocks shown in ;

[0036] Figure 4 is Figure 2 a schematic exploded structure diagram of the arc-shaped installation block shown in ;

[0037] Figure 5 is Figure 4 a schematic enlarged structure diagram of the "C"-shaped sealing strip shown in ;

[0038] Figure 6 is a schematic structure diagram of the connection of two arc-shaped installation blocks.

[0039] In the figure: 1, cylinder body; 100, arc-shaped installation block; 110, arc-shaped end wall; 120, outer arc-shaped wall; 121, first step; 122, second step; 123, third step; 124, threaded hole; 130, inner arc-shaped wall; 140, connecting ear; 150, first screw; 160, second screw; 161, gasket; 170, fitting groove; 180, fitting block; 190, "C"-shaped sealing strip; 191, first sealing part; 192, second sealing part; 193, third sealing part; 200, buffer pad; 210, first arc-shaped sealing piece; 220, second arc-shaped sealing piece; 103, arc-shaped sinking groove; 104, first arc-shaped groove; 105, second arc-shaped groove; 101, arc-shaped groove; 102, continuous arc-shaped groove. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0041] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators 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 indicators will also change accordingly.

[0042] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are 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, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0043] Tunnel boring machines (TBMs) are used to excavate tunnels underground. When the tunnel excavation is basically completed, the TBM needs to be received as a whole using the sleeve method. After the TBM is received, the steel sleeve of the shield needs to be removed. Therefore, the TBM reception places high demands on the ease of disassembly and assembly and the sealing performance of the steel sleeve.

[0044] Please see Figures 1-6 As shown in the figure, this application provides a shield tunneling steel sleeve, which includes a cylinder body 1, an arc-shaped mounting block 100, a first screw 150, a second screw 160, and a plurality of sealing elements.

[0045] The cylinder 1 has an open end, which is used to receive the tunnel boring machine (not shown). Six arc-shaped mounting blocks 100 are installed on the open end of the cylinder 1. The number of arc-shaped mounting blocks 100 is not limited to six. Other numbers such as five or eight can also be used. If the number of arc-shaped mounting blocks 100 is less, it is easier to improve the sealing and stability of the arc-shaped mounting blocks 100 after assembly. If the number of arc-shaped mounting blocks 100 is more, it is easier to ensure the portability of the arc-shaped mounting blocks 100, which facilitates the installation and maintenance of the arc-shaped mounting blocks 100. Multiple arc-shaped mounting blocks 100 are connected to each other to form a continuous arc-shaped groove 102 that fits into the open end.

[0046] The arc-shaped mounting block 100 includes an integrally connected arc-shaped end wall 110, an outer arc-shaped wall 120, and an inner arc-shaped wall 130. The outer arc-shaped wall 120 is connected to the outer arc side of the arc-shaped end wall 110 and is provided with a threaded hole 124. The inner arc-shaped wall 130 is connected to the inner arc side of the arc-shaped end wall 110 and is spaced apart from the outer arc-shaped wall 120.

[0047] The arc-shaped end wall 110, the outer arc-shaped wall 120, and the inner arc-shaped wall 130 together form an arc-shaped groove 101. The width of the arc-shaped groove 101 corresponds to the wall thickness of the cylinder 1 so that the arc-shaped mounting block 100 can be fitted and assembled with the cylinder 1.

[0048] Each arc-shaped mounting block 100 has connecting ears 140 at both ends. The connecting ears 140 on the connecting ends of two adjacent arc-shaped mounting blocks 100 can fit together tightly, and the connecting ears 140 on the connecting ends of two adjacent arc-shaped mounting blocks 100 can also have a certain distance.

[0049] Each arc-shaped mounting block 100 is provided with a threaded hole 124 extending from the outer arc surface of the arc-shaped mounting block 100 to the arc-shaped groove 101. The number of threaded holes 124 is not specifically limited and can be any number of holes. Figure 1 The arc-shaped mounting block 100 is shown to have two threaded holes 124, but it can also have three, four, or five holes.

[0050] The first screw 150 passes through two connecting ears 140 that fit on adjacent arc-shaped mounting blocks 100 to connect multiple arc-shaped mounting blocks 100 to each other in the inner and outer circumferential directions. The first screw 150 locks adjacent arc-shaped mounting blocks 100 in the circumferential direction, improving the sealing and connection stability between two adjacent arc-shaped mounting blocks 100.

[0051] The second screw 160 is used to lock the multiple arc-shaped mounting blocks 100 and the cylinder 1 into the threaded hole 124 after the arc-shaped mounting blocks 100 are fitted and assembled, thereby locking the multiple arc-shaped mounting blocks 100 and the cylinder 1 in the radial direction. A washer 161 is provided between the second screw 160 and the threaded hole 124 to improve the stability of the assembly between the arc-shaped mounting blocks 100 and the cylinder 1. There are multiple sets of threaded holes 124 and second screws 160. The number of threaded holes 124 and second screws 160 is not specifically limited and can be any number of... Figure 1 The arc-shaped mounting block 100 is shown to have two threaded holes 124 and two second screws 160, but it can also have three, four, or five screws. Correspondingly, the cylinder 1 can be provided with a limiting groove or limiting hole corresponding to the threaded hole 124. After the second screw 160 passes through the threaded hole 124, it cooperates with the limiting groove or limiting hole to prevent the arc-shaped mounting block 100 from easily coming loose from the cylinder 1.

[0052] Please see Figure 4 As shown, multiple sealing elements are disposed between the cylinder 1 and the arc-shaped mounting block 100, and also between adjacent arc-shaped mounting blocks 100. The multiple sealing elements may include an "U"-shaped sealing strip 190, a first arc-shaped sealing sheet 210, and a second arc-shaped sealing sheet 220.

[0053] Please see Figure 2 , Figure 3 As shown, each of the arc-shaped mounting blocks 100 is provided with an arc-shaped groove 101 that fits into the open end of the cylinder 1. Each end of the arc-shaped mounting block 100 is provided with a fitting groove 170 and a fitting block 180. The fitting groove 170 and the fitting block 180 are trapezoidal blocks that fit into each other. Adjacent arc-shaped mounting blocks 100 are connected by fitting grooves 170 and fitting blocks 180 to form a continuous arc-shaped groove 102, which is then assembled onto the open end of the cylinder 1. The length of fitting grooves 170 and fitting blocks 180 is less than the thickness of the arc-shaped mounting block 100, which improves the sealing performance of the fitting groove 170 and fitting block 180 assembly. The fitting grooves 170 and fitting blocks 180 are provided corresponding to the inner arc-shaped wall 130 and the outer arc-shaped wall 120.

[0054] The arc-shaped mounting block 100 is assembled by fitting the fitting groove 170 and the fitting block 180, which improves the convenience of installation, disassembly and maintenance of the arc-shaped mounting block 100. The traditional arc-shaped plate is connected by welding and installed at the open end of the cylinder 1, which is not only troublesome to assemble but also requires a lot of time to maintain. By assembling multiple arc-shaped mounting blocks 100, when water leakage or other maintenance is required, it is only necessary to disassemble and replace the arc-shaped mounting block 100 in the corresponding maintenance area.

[0055] Please see Figure 4 , Figure 5As shown, at the corners of the connecting ends of the arc-shaped mounting blocks 100, there are concave steps. The multiple sealing strips include a "C"-shaped sealing strip 190. The "C"-shaped sealing strip 190 is matched with the concave steps to form a seal between adjacent arc-shaped mounting blocks 100, which is beneficial to increasing the sealing performance of the connecting end faces between two adjacent arc-shaped mounting blocks 100.

[0056] The concave steps include a first step 121 recessed from the outer arc wall 120 and the outer surface of the inner arc wall 130, a second step 122 recessed from the arc end wall 110, and a third step recessed from the inner end surfaces of the outer arc wall 120 and the inner arc wall 130. The "C"-shaped sealing strip 190 includes a first sealing portion 191, a second sealing portion 192 and a third sealing portion 193 connecting the two ends of the first sealing portion 191. The first sealing portion 191 is correspondingly fitted into the first step 121, the second sealing portion 192 is correspondingly fitted into the second step 122, and the third sealing portion 193 is correspondingly fitted into the third step 123. The "C"-shaped sealing strip 190 is sequentially and correspondingly fitted into the concave steps through three parts, which is beneficial to the stability of the assembly of the "C"-shaped sealing strip 190. The "C"-shaped sealing strip 190 adopts a non-linear structure, so it is not easy to shift in the axial direction. After two adjacent arc-shaped mounting blocks 100 are assembled, the "C"-shaped sealing strip 190 therein is squeezed, causing the "C"-shaped sealing strip 190 to be squeezed and deformed, which is beneficial to increasing the sealing performance between the connecting end faces of two adjacent arc-shaped mounting blocks 100.

[0057] Please refer to Figure 4 As shown, an arc-shaped sunk groove 103 is further provided at the bottom of the arc-shaped groove 101 on the arc-shaped mounting block 100. The buffer pad 200 is fitted into the arc-shaped sunk groove 103. When the arc-shaped mounting block 100 is assembled on the opening end of the cylinder body 1, the buffer pad 200 is separated between the arc-shaped groove 101 and the top of the opening end of the cylinder body 1, which is used to increase the sealing performance between the arc-shaped mounting block 100 and the cylinder body 1. At the same time, it reduces the friction generated between the arc-shaped groove 101 and the opening end of the cylinder body 1 during work and buffers the vibration between the arc-shaped mounting block 100 and the cylinder body 1, which is beneficial to reducing the friction loss between equipment and improving the safety and sealing performance of the equipment.

[0058] Please refer to Figure 4As shown, the inner circumferential surface of the outer arc-shaped wall 120 of the arc-shaped mounting block 100 is further provided with a first arc-shaped groove 104, and the first arc-shaped sealing piece 210 is fitted into the first arc-shaped groove 104. The inner circumferential surface of the inner arc-shaped wall 130 of the arc-shaped mounting block 100 is further provided with a second arc-shaped groove, and the second arc-shaped sealing piece 220 is fitted into the second arc-shaped groove. After the arc-shaped mounting block 100 is assembled with the cylinder 1, the first arc-shaped sealing piece 210 and the second arc-shaped sealing piece 220 are respectively located on the inner and outer sides of the opening end of the cylinder 1 to increase the sealing performance between the arc-shaped mounting block 100 and the cylinder 1, and at the same time reduce the friction between the arc-shaped mounting block 100 and the cylinder 1, thereby reducing the frictional loss between the equipment.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A shield tunneling steel sleeve, characterized in that, The shield steel sleeve includes: A cylinder body (1) having an open end, and the cylinder body (1) is used to receive a shield machine; Multiple arc-shaped mounting blocks (100), each provided with an arc-shaped groove (101) fitted with the open end. The multiple arc-shaped mounting blocks (100) are connected to each other to form a continuous arc-shaped groove (102) fitted with the open end. Both ends of each arc-shaped mounting block (100) are provided with connecting ears (140), and each arc-shaped mounting block (100) is provided with a threaded hole (124) penetrating from the outer arc surface of the arc-shaped mounting block (100) to the arc-shaped groove (101); A first screw (150) for passing through the connecting ears (140) to connect the multiple arc-shaped mounting blocks (100) to each other in the circumferential direction; A second screw (160) for being locked into the threaded hole (124) after the arc-shaped mounting block (100) is fitted with the cylinder body (1) to lock the multiple arc-shaped mounting blocks (100) and the cylinder body (1) tightly in the radial direction; Multiple seals, arranged between the cylinder body (1) and the arc-shaped mounting block (100), and also arranged between adjacent arc-shaped mounting blocks (100); The arc-shaped mounting block (100) includes: An arc-shaped end wall (110); An outer arc-shaped wall (120), connected to the outer arc side of the arc-shaped end wall (110) and provided with the threaded hole (124); An inner arc-shaped wall (130), connected to the inner arc side of the arc-shaped end wall (110) and spaced opposite to the outer arc-shaped wall (120); Wherein, the arc-shaped groove (101) formed by enclosing the arc-shaped end wall (110), the outer arc-shaped wall (120), and the inner arc-shaped wall (130), and the connecting ears (140) are arranged on the outer arc-shaped wall (120) and / or the inner arc-shaped wall (130); A concave step is provided at the corner of the connecting ends of the arc-shaped mounting blocks (100). The multiple seals all include a "C"-shaped sealing strip (190), and the "C"-shaped sealing strip (190) is matched with the concave step to form a seal between adjacent arc-shaped mounting blocks (100); The concave step includes a first step (121) recessed from the outer surfaces of the outer arc-shaped wall (120) and the inner arc-shaped wall (130), a second step (122) recessed from the arc-shaped end wall (110), and a third step (123) recessed from the inner end surfaces of the outer arc-shaped wall (120) and the inner arc-shaped wall (130). The "C"-shaped sealing strip (190) includes a first sealing portion (191), a second sealing portion (192) and a third sealing portion (193) connecting the two ends of the first sealing portion (191). The first sealing portion (191) is correspondingly embedded in the first step (121), the second sealing portion (192) is correspondingly embedded in the second step (122), and the third sealing portion (193) is correspondingly embedded in the third step (123).

2. The shield tunneling steel sleeve according to claim 1, characterized in that, The two ends of the arc-shaped mounting block (100) are respectively provided with a fitting block (180) and a fitting groove (170), and two adjacent arc-shaped mounting blocks (100) are connected by the fitting block (180) and the fitting groove (170).

3. The shield tunneling steel sleeve according to claim 2, characterized in that, The lengths of the fitting block (180) and the fitting groove (170) are less than the thickness of the arc-shaped mounting block (100).

4. The shield tunneling steel sleeve according to claim 3, characterized in that, The fitting block (180) and the fitting groove (170) are respectively disposed on the outer arc-shaped wall (120) and the inner arc-shaped wall (130).

5. The shield tunneling steel sleeve according to claim 1, characterized in that, The bottom of the arc-shaped groove (101) is further provided with an arc-shaped sinking groove (103), and the shield steel sleeve also includes a buffer pad (200), which is fitted and matched in the arc-shaped sinking groove (103).

6. The shield tunneling steel sleeve according to claim 1, characterized in that, The inner circumferential surface of the outer arc-shaped wall (120) is further provided with a first arc-shaped groove (104), and the plurality of sealing elements include a first arc-shaped sealing piece (210), which is matched and fitted in the first arc-shaped groove (104).

7. The shield tunneling steel sleeve according to claim 1, characterized in that, The inner circumferential surface of the inner arc-shaped wall (130) is further provided with a second arc-shaped groove (105), and the plurality of sealing elements include a second arc-shaped sealing sheet (220), which is matched and fitted in the second arc-shaped groove (105).

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