Waterproof connecting structure for shield tunnel segments

Abstract

The utility model discloses a shield tunnel duct piece waterproof connecting structure which comprises a first duct piece and a second duct piece, a connecting block is arranged on the inner side of the second duct piece, a screw hole is formed in the connecting block, a fixing screw is arranged on the screw hole, a fixing nut is arranged on the fixing screw, a limiting assembly is arranged on the connecting block, and the limiting assembly is connected with the first duct piece and the second duct piece. A fixing ring is arranged at the bottom of the connecting block, a plurality of sets of limiting holes are formed in the fixing nut, a fastening pad is arranged at one end of the fixing nut, a sealing piece is arranged at one end of the second pipe piece, a sealing sleeve is arranged on the sealing pad, and a connecting groove is formed in one end of the first pipe piece. Through the arrangement of the limiting assembly, the fixing ring, the limiting hole, the sealing piece, the sealing sleeve and the connecting groove, the fixing nut can be limited through the structure, the fixing nut cannot rotate at will after slipping in the later period, the connecting stability between pipe pieces is not prone to being affected, and the waterproof effect of the connecting position of the pipe pieces can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield tunnel engineering, in particular to a waterproof connection structure for shield tunnel segments. Background Technique

[0002] Shield segments are the main assembled components in shield construction. They are the innermost barrier of the tunnel, bearing the functions of resisting soil pressure, groundwater pressure, and some special loads. Shield segments are the permanent lining structure of shield tunnels. The quality of shield segments is directly related to the overall quality and safety of the tunnel, affecting the waterproof performance and durability of the tunnel. After the shield propulsion is completed, the segments are quickly assembled into a ring. Except for special occasions, mostly staggered joint assembly is adopted, and the segments at the connection passage sometimes adopt straight joint assembly.

[0003] The prior art has the following deficiencies: In the prior art, in the "A Shield Segment Connection Structure" with the application number 202320974804.6, "it includes a segment body and a fixing screw. The side wall of the segment body is provided with a first connection block and a second connection block. Corresponding connection holes are provided on both the first connection block and the second connection block. A fixing screw is embedded in the connection hole. An anti-slip gasket is provided on the inner wall of the connection hole. Fixing bolts are provided at both ends of the fixing screw, and a rubber ring is provided on the side wall of the fixing screw";

[0004] The above device is convenient for anti-slip limiting of the connection of segments by setting a fixing screw, an anti-slip gasket, a rubber ring, etc., increasing the stability of the connection. However, after long-term use, the materials of the anti-slip gasket and the rubber ring will age. After the two groups of segments are stretched and stressed, the anti-slip gasket and the rubber ring have a poor limiting effect on the fixing screw, and the nuts on the fixing screw are still prone to thread slipping and loosening, thereby affecting the connection stability between the segments. Moreover, the above device increases the sealing performance of the segment connection by a sealing gasket to improve the waterproof effect. The sealing gasket mainly relies on its own elastic extrusion deformation to closely adhere to the segment to achieve the sealing effect. However, after the sealing gasket ages for a long time, its elasticity will gradually disappear. At this time, the sealing gasket often cannot closely adhere to the segment, thereby affecting the waterproof effect of the segment connection. The waterproof effect of the segment connection can be further improved. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a waterproof connection structure for shield tunnel segments to solve the problems raised in the above background technique.

[0006] To achieve the above object, the present utility model provides the following technical solution: A waterproof connection structure for shield tunnel segments, including a first segment and a second segment. A connection block is provided inside the second segment. A screw hole is formed in the connection block. A fixing screw is provided on the screw hole, and a fixing nut is provided on the fixing screw. A limiting component is provided on the connection block. A fixing ring is provided at the bottom of the connection block. A number of groups of limiting holes are formed in the fixing nut. A fastening pad is provided at one end of the fixing nut. A sealing member is provided at one end of the second segment. A sealing sleeve is provided on the sealing member. A connection groove is formed at one end of the first segment;

[0007] The limiting component includes an empty groove, a spring, a limiting rod and a fixing rope. An empty groove is formed on one side of the connection block and is located below the screw hole. A spring is provided in the empty groove. A limiting rod is provided on one side of the connection block. A fixing rope is provided at the bottom of the connection block.

[0008] As a preferred technical solution of the present utility model, the connection block is fixedly installed inside the second segment, and one end of the spring is fixedly installed at the bottom of the empty groove.

[0009] As a preferred technical solution of the present utility model, the empty groove is adapted to the limiting rod, and one end of the limiting rod extends into the empty groove and is fixedly installed at the other end of the spring.

[0010] As a preferred technical solution of the present utility model, one end of the fixing rope sequentially passes through the bottom of the connection block, the bottom of the empty groove, and the spring and is fixedly installed at the extending end of the limiting rod. The fixing ring is fixedly installed at the bottom of the connection block and is close to the fixing rope. There is a connection between the fixing rope and the fixing ring.

[0011] As a preferred technical solution of the present utility model, the fastening pad is fixedly installed at one end of the fixing nut, and the specific material of the fastening pad is soft silicone. The several groups of limiting holes on the fixing nut are integrally arranged in a circular array and penetrate the fastening pad.

[0012] As a preferred technical solution of the present utility model, connection blocks are provided inside both the first segment and the second segment. The two connection blocks are fixed by two fixing screws and four fixing nuts, and the fastening pad is in contact with the connection block. Limiting components are provided at both ends of the two connection blocks and correspond to the positions of the screw holes. The limiting holes are adapted to the extending ends of the limiting rods. The extending ends of the four limiting rods are all clamped in one of the groups of limiting holes on the corresponding fixing nuts.

[0013] As a preferred technical solution of the present utility model, the seal is embedded at one end of the second segment. The seal is arc-shaped and made of a rigid material. The seal sleeve is sleeved and fixed on the seal, and the specific material of the seal sleeve is soft silicone. The connection groove is adapted to the seal, and the seal is snap-fitted into the connection groove.

[0014] Compared with the prior art, the present utility model provides a waterproof connection structure for shield tunnel segments, which has the following beneficial effects:

[0015] 1. For this waterproof connection structure of shield tunnel segments, by setting the limit component, fixing ring, and limit holes, pulling the fixing rope makes the limit rod entirely located in the empty groove. At the same time, the fixing rope is tied to the fixing ring. At this time, the fixing screw and fixing nut can be normally installed. After the fixing nut is installed, the fixing rope is detached from the fixing ring, and one end of the limit rod will extend and be snap-fitted into one of the limit holes on the fixing nut. The limit rod being snap-fitted in the limit hole can limit the fixing nut, and the fixing nut will not rotate randomly even if the threads are worn later, which is not likely to affect the connection stability between the segments.

[0016] 2. For this waterproof connection structure of shield tunnel segments, by setting the seal, seal sleeve, and connection groove, when the first segment and the second segment are connected, the seal will be snap-fitted into the connection groove. The seal sleeve can make the seal fit more closely to the connection groove. The seal can seal the connection gap between the first segment and the second segment and block rainwater. Moreover, even if the material of the seal ages later, the seal itself can still play a role in sealing and rain shielding, which is not likely to affect the waterproof effect at the connection of the segments and can further improve the waterproof effect at the connection of the segments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the structure of the first segment of the present utility model;

[0019] Figure 3 is a schematic diagram of the structure of the second segment of the present utility model;

[0020] Figure 4 is of the present utility model Figure 3 an enlarged schematic diagram of part A;

[0021] Figure 5 is a schematic diagram of the cross-sectional structure of the connection block of the present utility model;

[0022] Figure 6 is a schematic diagram of the structure of the fixing nut of the present utility model.

[0023] In the figure: 1. First segment; 2. Second segment; 3. Connecting block; 4. Screw hole; 5. Fixed screw; 6. Fixed nut; 7. Limiting component; 701. Empty slot; 702. Spring; 703. Limiting rod; 704. Fixed rope; 8. Fixed ring; 9. Limiting hole; 10. Tightening pad; 11. Sealing member; 12. Sealing sleeve; 13. Connecting groove. Detailed implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-6 , in this implementation scheme: A waterproof connection structure for shield tunnel segments includes a first segment 1 and a second segment 2. A connecting block 3 is arranged on the inner side of the second segment 2. The connecting block 3 can facilitate the fixation between the first segment 1 and the second segment 2. A screw hole 4 is opened on the connecting block 3. A fixed screw 5 is arranged on the screw hole 4. A fixed nut 6 is arranged on the fixed screw 5. A limiting component 7 is arranged on the connecting block 3. A fixed ring 8 is arranged at the bottom of the connecting block 3. A number of groups of limiting holes 9 are opened on the fixed nut 6. A tightening pad 10 is arranged at one end of the fixed nut 6. A sealing member 11 is arranged at one end of the second segment 2. The sealing member 11 can seal the connection gap between the first segment 1 and the second segment 2 and block rainwater. A sealing sleeve 12 is arranged on the sealing member 11. A connecting groove 13 is opened at one end of the first segment 1;

[0026] The limiting component 7 includes an empty slot 701, a spring 702, a limiting rod 703 and a fixed rope 704. An empty slot 701 is opened on one side of the connecting block 3 and the empty slot 701 is located below the screw hole 4. A spring 702 is arranged in the empty slot 701. A limiting rod 703 is arranged on one side of the connecting block 3. A fixed rope 704 is arranged at the bottom of the connecting block 3. By pulling the fixed rope 704, the movement of the limiting rod 703 can be driven.

[0027] In this embodiment, the connecting block 3 is fixedly installed on the inner side of the second segment 2, and one end of the spring 702 is fixedly installed at the bottom of the empty slot 701;

[0028] Specifically, the empty slot 701 can facilitate the installation of the spring 702 and the limiting rod 703;

[0029] In this embodiment, the empty slot 701 is adapted to the limiting rod 703. One end of the limiting rod 703 extends into the empty slot 701 and is fixedly installed at the other end of the spring 702;

[0030] Specifically, the spring 702 can facilitate the rebound and reset of the limiting rod 703 after being pulled;

[0031] In this embodiment, one end of the fixing rope 704 sequentially passes through the bottom of the connecting block 3, the bottom of the empty slot 701, and the spring 702, and is fixedly installed at the extending end of the limiting rod 703. The fixing ring 8 is fixedly installed at the bottom of the connecting block 3 and is close to the fixing rope 704, and there is a connection between the fixing rope 704 and the fixing ring 8;

[0032] Specifically, the fixing ring 8 can facilitate the connection and fixation of the fixing rope 704;

[0033] In this embodiment, the fastening pad 10 is fixedly installed at one end of the fixing nut 6, and the specific material of the fastening pad 10 is soft silicone. Several groups of limiting holes 9 on the fixing nut 6 are integrally arranged in a circular array and penetrate through the fastening pad 10;

[0034] Specifically, the fastening pad 10 can make the fixing nut 6 fit more closely to the connecting block 3 and reduce the wear of the contact part between the fixing nut 6 and the connecting block 3;

[0035] In this embodiment, connecting blocks 3 are arranged on the inner sides of the first segment 1 and the second segment 2. The two groups of connecting blocks 3 are fixed by two groups of fixing screws 5 and four groups of fixing nuts 6, and the fastening pads 10 are attached to the connecting blocks 3. Limiting components 7 are arranged at both ends of the two groups of connecting blocks 3 and correspond to the positions of the screw holes 4. The limiting holes 9 are adapted to the extending ends of the limiting rods 703, and the extending ends of the four groups of limiting rods 703 are all clamped in one of the groups of limiting holes 9 on the corresponding fixing nuts 6;

[0036] Specifically, the limiting rod 703 being clamped in the limiting hole 9 can limit the fixing nut 6, and the fixing nut 6 will not rotate randomly after the thread slips;

[0037] In this embodiment, the seal 11 is embedded at one end of the second segment 2. The seal 11 is arc-shaped and made of a rigid material. The seal sleeve 12 is sleeved and fixed on the seal 11, and the specific material of the seal sleeve 12 is soft silicone. The connection groove 13 is adapted to the seal 11, and the seal 11 is clamped in the connection groove 13;

[0038] Specifically, the seal sleeve 12 can make the seal 11 fit more closely to the connection groove 13.

[0039] Working principle and usage process of the present utility model: Successively pull the four groups of fixing ropes 704 so that the corresponding limiting rods 703 are all located entirely within the empty slots 701. During this process, the corresponding springs 702 will be compressed. At the same time, tie the four groups of fixing ropes 704 to the fixing ring 8 to fix the positions of the limiting rods 703. At this time, the fixing screw 5 and the fixing nut 6 can be normally installed. After the fixing nut 6 is installed, detach the four groups of fixing ropes 704 from the fixing ring 8. Due to the resilience effect of the springs 702, one end of the four groups of limiting rods 703 will protrude and be clamped in one of the limiting holes 9 on the corresponding fixing nut 6. The clamping of the limiting rod 703 in the limiting hole 9 can limit the fixing nut 6, and the fixing nut 6 will not rotate randomly even if it slips in the later stage, which is not likely to affect the connection stability between the segments. When it is necessary to remove the fixing nut 6 in the later stage, perform the above operations in reverse;

[0040] When the first segment 1 is connected to the second segment 2, the seal 11 will be clamped in the connection groove 13. The seal sleeve 12 can make the seal 11 fit more closely to the connection groove 13. The seal 11 can seal the connection gap between the first segment 1 and the second segment 2 and block rainwater. And even when the material of the seal 11 ages in the later stage, the seal 11 itself can still play the role of sealing and rain shielding, which is not likely to affect the waterproof effect at the segment connection, and can further improve the waterproof effect at the segment connection.

[0041] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A shield tunnel segment waterproof connection structure, comprising a first segment (1) and a second segment (2), wherein a connection block (3) is arranged on the inner side of the second segment (2), a screw hole (4) is opened on the connection block (3), a fixing screw (5) is arranged on the screw hole (4), and a fixing nut (6) is arranged on the fixing screw (5), characterized in that: A limit assembly (7) is provided on the connection block (3), a fixing ring (8) is provided at the bottom of the connection block (3), a plurality of groups of limit holes (9) are provided on the fixing nut (6), a fastening pad (10) is provided at one end of the fixing nut (6), a sealing member (11) is provided at one end of the second pipe segment (2), a sealing sleeve (12) is provided on the sealing member (11), and a connecting groove (13) is provided at one end of the first pipe segment (1); The limiting assembly (7) comprises an empty slot (701), a spring (702), a limiting rod (703) and a fixing rope (704); an empty slot (701) is provided on one side of the connecting block (3) and the empty slot (701) is located below the screw hole (4); a spring (702) is arranged in the empty slot (701); a limiting rod (703) is provided on one side of the connecting block (3); and a fixing rope (704) is arranged at the bottom of the connecting block (3).

2. A shield tunnel segment waterproof connection structure according to claim 1, characterized in that: The connecting block (3) is fixedly mounted on the inner side of the second pipe segment (2), and one end of the spring (702) is fixedly mounted on the bottom of the empty groove (701).

3. A shield tunnel segment waterproof connection structure according to claim 1, characterized in that: The empty slot (701) is matched with the limiting rod (703), and one end of the limiting rod (703) extends into the empty slot (701) and is fixedly mounted on the other end of the spring (702).

4. A shield tunnel segment waterproof connection structure according to claim 1, characterized in that: One end of the fixing rope (704) passes through the bottom of the connecting block (3), the bottom of the empty slot (701), and the spring (702) in sequence and is then fixedly mounted on the protruding end of the limiting rod (703). The fixing ring (8) is fixedly mounted on the bottom of the connecting block (3) and close to the fixing rope (704). A connection exists between the fixing rope (704) and the fixing ring (8).

5. The shield tunnel segment waterproof connection structure according to claim 1, characterized in that: The fastening pad (10) is fixedly mounted on one end of the fixing nut (6) and the specific material of the fastening pad (10) is soft silica gel. The plurality of groups of limiting holes (9) on the fixing nut (6) are in an annular array as a whole and penetrate the fastening pad (10).

6. A shield tunnel segment waterproof connection structure according to claim 1, characterized in that: The inner sides of the first pipe segment (1) and the second pipe segment (2) are both provided with connecting blocks (3); the two groups of connecting blocks (3) are fixed by two groups of fixing screws (5) combined with four groups of fixing nuts (6); and the fastening pads (10) are in contact with the connecting blocks (3); both ends of the two groups of connecting blocks (3) are provided with limiting components (7) corresponding to the positions of the screw holes (4); the limiting holes (9) are adapted to the protruding ends of the limiting rods (703); and the protruding ends of the four groups of limiting rods (703) are all clamped in one of the limiting holes (9) on the corresponding fixing nuts (6).

7. The shield tunnel segment waterproof connection structure according to claim 1, characterized in that: The sealing member (11) is embedded in one end of the second pipe segment (2); the sealing member (11) is arc-shaped and is made of a hard material; the sealing sleeve (12) is sleeved and fixed on the sealing member (11); and the specific material of the sealing sleeve (12) is soft silicone; the connecting groove (13) is adapted to the sealing member (11), and the sealing member (11) is snap-fitted into the connecting groove (13).

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