Interlocking screw mechanism for quickly blocking shield grouting hole

Abstract

The utility model discloses an interlocking screw mechanism for fast blocking a shield grouting hole, which comprises a shield segment and an inner sleeve pre-buried on the shield segment, the inner sleeve penetrates through the shield segment, the inner sleeve is connected with a rotary interlocking fastener through a rotary clamping mechanism, and the rotary interlocking fastener is connected with the shield segment. And an inner sealing structure and an outer sealing structure are respectively arranged between the rotary interlocking fastener and the inner sleeve. According to the rotary clamping mechanism, the middle protruding block is arranged at the top of the rotary interlocking buckle and connected with the rotary handle, in the splicing installation process, a worker aligns an interlocking groove in the rotary interlocking buckle to a tenon, inserts the tenon and rotates the tenon by a certain angle, splicing installation of the rotary clamping mechanism is completed, operation is convenient, and the rotary clamping mechanism is environmentally friendly and durable; manufacturing materials and equipment are easy to obtain, and large-scale production and application are facilitated; good application prospects and economic benefits are realized.

Description

Technical Field

[0001] This utility model relates to the field of shield tunneling technology, and in particular to an interlocking spiral mechanism for rapid sealing of grouting holes in shield tunnels. Background Technology

[0002] During shield tunneling, to control ground deformation, prevent ground subsidence, and ensure the stability of the tunnel lining structure, especially in areas with adverse geological conditions such as sand layers, water-rich strata, or fault fracture zones, secondary grouting is required through pre-reserved grouting holes in the tunnel segments. These grouting holes are the openings directly connecting the tunnel segments to the external strata. If not sealed, groundwater or external water pressure may seep into the tunnel through these holes, causing leakage. Furthermore, prolonged contact between the shield tunnel segments and groundwater or corrosive substances in the soil accelerates the deterioration of the segment structure, seriously affecting operational safety. Therefore, timely sealing of the grouting holes after secondary grouting is crucial and necessary. Currently, commonly available plastic plugs for grouting holes cannot effectively isolate the tunnel segments from groundwater; moreover, their removal is inconvenient for future grouting replenishment or maintenance. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an interlocking spiral mechanism for rapid sealing of grouting holes in tunnel boring machines. This mechanism addresses the deficiencies of existing plastic plugs for grouting holes, such as their inability to effectively isolate groundwater and the inconvenience of subsequent disassembly. The invention provides a rotary interlocking mechanism for rapid sealing of grouting holes in tunnel boring machines, which can effectively isolate groundwater and can be used for the rapid sealing and opening of grouting holes in tunnel boring machines.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An interlocking spiral mechanism for rapid sealing of grouting holes in tunnel boring machines includes a tunnel segment and an inner sleeve embedded thereon. The inner sleeve penetrates the tunnel segment, and a rotary interlocking fastener is connected inside the inner sleeve by a rotary snap-fit ​​mechanism. An inner sealing structure and an outer sealing structure are respectively provided between the rotary interlocking fastener and the inner sleeve.

[0006] Preferably, the rotary locking mechanism includes tenons symmetrically arranged on the inner wall of the inner sleeve and interlocking grooves centrally symmetrically distributed on the outer wall of the rotary interlocking fastener. The interlocking grooves are L-shaped and are matched with the tenons.

[0007] Preferably, the inner sealing structure includes an inner step disposed on the inner wall of the inner sleeve. The inner step is an annular structure and its wall thickness is greater than the depth of the interlocking groove.

[0008] Preferably, the outer end of the rotary interlocking buckle is provided with an end cap, the outer side of the end cap is provided with an installation groove, the inner wall of the installation groove is provided with a middle protrusion, and the middle protrusion is rotatably connected to a rotary handle.

[0009] Preferably, the external sealing structure includes an elastic sealing ring, which is located between the end cap and the inner sleeve, and is fitted onto the rotary interlocking fastener.

[0010] Preferably, the outer wall of the inner sleeve is provided with an outer wall thread.

[0011] Compared with the prior art, the advantages of this utility model are as follows: This utility model has a central protrusion on the top of the rotating interlocking fastener, and the central protrusion is connected to a rotating handle. During the splicing and installation, the worker aligns the interlocking groove of the rotating interlocking fastener with the tenon, inserts it, and rotates it at a certain angle to complete the splicing and installation of the rotating fastener mechanism. It is easy to operate, environmentally friendly and durable, and the materials and equipment used to make it are readily available, which facilitates large-scale production and application. It has good application prospects and economic benefits. Attached Figure Description

[0012] To illustrate the technical solutions in the embodiments of this utility model or the prior art more specifically and intuitively, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall installation proposed in this utility model;

[0014] Figure 2 This is a schematic diagram of the inner sleeve structure proposed in this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the rotary interlocking fastener proposed in this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the rotary handle proposed in this utility model;

[0017] Figure 5 This is a schematic diagram of the internal structure of the inner sleeve proposed in this utility model.

[0018] In the diagram: Inner sleeve 1, outer wall thread 11, tenon 12, inner step 13, rotating interlocking fastener 2, intermediate protrusion 21, end cap 22, rotating handle 23, interlocking groove 24, shield tunnel segment 3, elastic sealing ring 4. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-5An interlocking spiral mechanism for rapid sealing of grouting holes in tunnel boring machines includes a tunnel segment 3 and an inner sleeve 1 pre-embedded thereon. The inner sleeve 1 penetrates the tunnel segment 3. A rotary interlocking fastener 2 is connected inside the inner sleeve 1 through a rotary snap-fit ​​mechanism. An inner sealing structure and an outer sealing structure are respectively provided between the rotary interlocking fastener 2 and the inner sleeve 1.

[0021] The inner sleeve 1 is made of rigid polymer material and is pre-embedded during the casting of the shield segment 3. The outer wall is covered with outer wall threads 11 extending from the tail to the head so as to better integrate with the shield segment 3 structure during the forming process. The length of the inner sleeve 1 is the same as the length of the shield segment 3 so as to better prevent groundwater and harmful corrosive substances from being poured into the tunnel through the grouting hole.

[0022] In this embodiment, the rotating snap-fit ​​mechanism includes tenons 12 symmetrically arranged on the inner wall of the inner sleeve 1 and interlocking grooves 24 centrally symmetrically distributed on the outer wall of the rotating interlocking snap fastener 2. The interlocking grooves 24 are L-shaped and are matched with the tenons 12.

[0023] In this embodiment, the outer end of the rotary interlocking fastener 2 is provided with an end cap 22, the outer side of the end cap 22 is provided with an installation groove, the inner wall of the installation groove is provided with a middle protrusion 21, and the middle protrusion 21 is rotatably connected to a rotary handle 23.

[0024] The rotating interlocking fastener 2 is made of hard polymer material, and its length does not exceed the length of the inner sleeve 1. It is designed to be solid. The outer wall of the rotating interlocking fastener 2 has an interlocking groove 24 corresponding to the tenon 12 of the inner sleeve 1. During production, the width and depth of the interlocking groove 24 are 1-2mm larger than the tenon 12. After that, a chlorinated rubber coating is applied to ensure the quality of the connection between the rotating interlocking fastener 2 and the inner sleeve 1 and the impermeability. The top of the rotating interlocking fastener 2 is provided with a middle protrusion 21, which is connected to a rotating handle 23. During the splicing and installation, the worker aligns the interlocking groove 24 of the rotating interlocking fastener 2 with the tenon 12, inserts it, and rotates it at a certain angle to complete the splicing and installation of the rotating interlocking mechanism.

[0025] In this embodiment, the inner sealing structure includes an inner step 13 set on the inner wall of the inner sleeve 1. The inner step 13 is an annular structure with a wall thickness greater than the depth of the interlocking groove 24. When the rotating interlocking fastener 2 contacts the inner step 13, the inner step 13 seals the end of the interlocking groove 24 to prevent slurry from entering the interlocking groove 24. After solidification, it restricts the relative movement of the tenon 12 and the interlocking groove 24, resulting in the situation where the rotating interlocking fastener 2 cannot be removed.

[0026] In this embodiment, the outer sealing structure includes an elastic sealing ring 4, which is located between the end cap 22 and the inner sleeve 1. The elastic sealing ring 4 is sleeved on the rotary interlocking fastener 2 to seal the inner sleeve 1 and the end cap 22 to prevent grout leakage. At the same time, the elastic sealing ring 4 also uses its rebound force to eliminate the assembly gap between the tenon 12 and the interlocking groove 24, thereby improving the connection stability.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An interlocking screw mechanism for rapid plugging of a shield grouting hole, comprising a shield segment (3) and an inner sleeve (1) embedded thereon, characterized in that, The inner sleeve (1) penetrates the shield tunnel segment (3). The inner sleeve (1) is connected to a rotating interlocking fastener (2) through a rotating snap-fit ​​mechanism. An inner sealing structure and an outer sealing structure are respectively provided between the rotating interlocking fastener (2) and the inner sleeve (1).

2. The interlocking screw mechanism for rapid closure of a shield grouting hole according to claim 1, wherein, The rotating snap-fit ​​mechanism includes tenons (12) symmetrically arranged on the inner wall of the inner sleeve (1) and interlocking grooves (24) centrally symmetrically distributed on the outer wall of the rotating interlocking snap fastener (2). The interlocking grooves (24) are L-shaped and are matched with the tenons (12).

3. The interlocking screw mechanism for rapid closure of a shield grouting hole according to claim 2, wherein, The inner sealing structure includes an inner step (13) set on the inner wall of the inner sleeve (1). The inner step (13) is an annular structure and its wall thickness is greater than the depth of the interlocking groove (24).

4. The interlocking screw mechanism for rapid closure of a shield grouting hole according to claim 3, wherein, The outer end of the rotary interlocking buckle (2) is provided with an end cap (22), the outer side of the end cap (22) is provided with an installation groove, the inner wall of the installation groove is provided with a middle protrusion (21), and the middle protrusion (21) is rotatably connected to a rotary handle (23).

5. The interlocking screw mechanism for rapid closure of a shield grouting hole according to claim 4, wherein, The external sealing structure includes an elastic sealing ring (4), which is located between the end cap (22) and the inner sleeve (1). The elastic sealing ring (4) is sleeved on the rotary interlocking buckle (2).

6. The interlocking screw mechanism for rapid sealing of grouting holes in tunnel boring machines according to claim 5, characterized in that, The outer wall of the inner sleeve (1) is provided with an outer wall thread (11).

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