Adaptive waterproof device for shield segment joints

Abstract

The present invention discloses an adaptive waterproofing device for shield segment joints, comprising a first connector and a second connector, each of which is sealed and connected to the two joined shield segments in a one-to-one correspondence; and a third connector, one end of which is connected to the first connector and the other end of which is movably and sealably connected to the second connector. The novel adaptive waterproofing device for shield segment joints provided by the present invention effectively solves the problem of misalignment between some shield segments due to factors such as installation accuracy and external pressure. It has high adaptability, a simple structure, easy operation, and strong engineering practicality.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel engineering construction, in particular to a waterproof device, and in particular to an adaptive waterproof device for splicing seams of shield segments. Background Art

[0002] As is well known, shield tunneling utilizes a fully mechanized construction method during tunnel construction, characterized by high efficiency, safety, environmental friendliness, and minimal impact on the surrounding environment. In existing technology, shield segments are the innermost barrier of a tunnel, responsible for resisting soil pressure, groundwater pressure, and certain special loads. Elastic sealing gaskets are primarily used to waterproof the joints between adjacent shield segments.

[0003] For example, the invention patent with the authorization announcement number CN110359925B and the publication date January 5, 2021, and the name of the invention patent is "Inserted Sealed Shield Segment Structure", which is respectively provided with a first installation groove and a second installation groove on both sides above the segment body, and the first installation groove and the second installation groove are in a "type structure" with the openings facing outward; an extension-type rubber plate is provided in the first installation groove, and a small rubber plate is provided in the second installation groove: the outer side of the extension-type rubber plate is located on the outer side of the segment body: during the construction process, a plurality of segments are assembled into a pipe ring, and the adjacent segments are connected by the extension-type rubber plate and the small rubber plate: a water strip is provided under the outward extension section of the extension-type rubber plate. The present invention is easy to install, has good support capacity, effect, high safety, good sealing, and strong water pressure resistance, which solves the problems of poor sealing of the joints between adjacent segments and low water pressure resistance.

[0004] The shortcoming of the existing technology including the above-mentioned patent is that due to installation accuracy, external pressure and other reasons, some shield segments may be misaligned. At this time, the elastic sealing gasket in the existing technology is not sealed tightly. Summary of the Invention

[0005] The purpose of the present invention is to provide a shield segment splicing seam adaptive waterproof device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A self-adaptive waterproof device for shield segment joints comprises a first connecting piece and a second connecting piece, both of which are sealed and connected to two spliced ​​shield segments in a one-to-one correspondence; and a third connecting piece, one end of which is connected to the first connecting piece and the other end of which is movably and sealably connected to the second connecting piece.

[0008] In the above-mentioned shield segment joint adaptive waterproof device, a groove is provided on one of the shield segments, and the first connecting member is bonded in the groove to achieve the sealed connection.

[0009] In the above-mentioned shield segment joint adaptive waterproofing device, one end of the third connecting member is provided with a first inverted tooth, and one end of the first connecting member is provided with a third inverted tooth, and the first inverted tooth is meshed and connected with the third inverted tooth.

[0010] In the above-mentioned shield segment joint adaptive waterproofing device, one end of the third connecting member is provided with a first inverted tooth, and one end of the first connecting member is provided with a third inverted tooth, and the first inverted tooth is meshed and connected with the third inverted tooth.

[0011] In the above-mentioned shield segment joint adaptive waterproofing device, the tooth shapes of the second inverted teeth and the fourth inverted teeth are inclined toward the joint direction of the two shield segments.

[0012] In the above-mentioned shield segment joint adaptive waterproofing device, the tooth shapes of the first inverted teeth and the third inverted teeth are inclined in the direction away from the joint of the two shield segments.

[0013] In the above-mentioned shield segment joint adaptive waterproof device, the third connecting member is integrated with an elastic metal sheet.

[0014] The above-mentioned shield segment joint adaptive waterproof device, the second connecting piece includes an upper holding clip and a lower holding clip, the upper holding clip and the lower holding clip are rotationally connected, the lower holding clip is sealed and connected to the shield segment, and the upper holding clip is connected to the third connecting piece.

[0015] In the above-mentioned shield segment joint adaptive waterproof device, a wing is provided on the end of the upper holding clamp facing away from the third connecting piece, and the wing is sealingly fitted on the shield segment.

[0016] In the above-mentioned shield segment splicing seam adaptive waterproofing device, the upper holding clip and the lower holding clip are rotatably connected via a rotating shaft, and a torsion spring is provided on the rotating shaft.

[0017] In the above technical solution, the new shield segment joint adaptive waterproof device provided by the present invention is capable of moving between the third connection and the second connection piece. In this way, when misalignment occurs between two shield segments, the displacement difference caused by the misalignment is matched by the relative movement between the third connection and the second connection piece, so that efficient sealing can still be achieved after misalignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the layout of the shield segment joint adaptive waterproofing device provided by the embodiment of the present invention

[0020] Figure 2 It is a schematic diagram of the overall structure of the shield segment splicing seam adaptive waterproofing device of the present invention.

[0021] Figure 3 for Figure 2 AA section view in.

[0022] Figure 4 for Figure 2 BB cross-section view in.

[0023] Figure 5 This is a schematic diagram of the use of the shield segment splicing seam adaptive waterproofing device of the present invention.

[0024] Figure 6 This is a schematic diagram of the shield segment joint adaptive waterproof device used after it expands in water.

[0025] Figure 7 This is a schematic diagram of the use of the shield segment splicing seam adaptive waterproofing device of the present invention when the segments are opened.

[0026] Figure 8 This is a schematic diagram of the use of the shield segment splicing seam adaptive waterproofing device of the present invention when the segments are misaligned.

[0027] Legend:

[0028] 1. Third connecting piece; 2. First inverted tooth; 3. Elastic metal sheet; 4. Slot; 5. Second connecting piece; 6. Upper clamping piece; 7. Lower clamping piece; 8. Support connecting piece; 9. Rotating shaft; 10. Torsion spring; 11. Wing; 12. First connecting piece; 13. Second inverted tooth; 14. Second shield segment; 15. First shield segment; 16. Segment joint gap; 17. Fourth inverted tooth; 18. Third inverted tooth; 19. Waterproof device DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1-8 As shown, an embodiment of the present invention provides an adaptive waterproof device for the splicing seams of shield segments, including a first connecting member and a second connecting member, which are respectively and one-to-one sealedly connected to two spliced ​​shield segments; a third connecting member, one end of which is connected to the first connecting member, and the other end of which can be movably sealed and connected to the second connecting member.

[0031] Specifically, the shield segments are arc-shaped, and the edges of two adjacent shield segments are butted together. After the installation of multiple shield segments is completed, a cylindrical supporting structure is formed. When the shield segments are assembled, each shield segment is sequentially attached to the tunnel wall. The shield segment splicing seam adaptive waterproofing device provided in this embodiment is installed at the splicing seam position of the two shield segments. For the convenience of description, the shield segment installed later of the two connected shield segments is called the first shield segment, and the shield segment installed earlier is called the second shield segment.

[0032] The first connector 12 provided in this embodiment is sealedly connected to the first shield segment 15, such as a strip-shaped sealing structure bonded to the first shield segment 15, or other structures in the prior art that can be sealedly connected to the first shield segment 15. The second connector 5 is sealedly connected to the second shield segment 14, such as a strip-shaped sealing structure bonded to the first shield segment 15, or other structures in the prior art that can be sealedly connected to the first shield segment 15. The third connector 1 is sealedly connected to the first connector 12 at one end and movably sealed to the second connector 5 at the other end. The key point is that the connection structure between the third connector 1 and the second connector 5 is a reciprocating sealing connection structure, such as a packing seal, a lip seal, a packingless sealing structure, etc. Preferably, the third connector 1 and the second connector 5 have a toothed sealing structure. In this way, when the first shield segment 15 and the second shield segment 14 are misaligned, the connection structure between the third connecting member 1 and the second connecting member 5 is a reciprocating sealing structure. The two move relative to each other, but they still have a sealing effect after the movement.

[0033] In the above technical solution, the new shield segment joint adaptive waterproof device provided by the present invention is capable of moving between the third connection and the second connection piece. In this way, when misalignment occurs between two shield segments, the displacement difference caused by the misalignment is matched by the relative movement between the third connection and the second connection piece, so that efficient sealing can still be achieved after misalignment.

[0034] In another embodiment provided herein, preferably, the first connector 12 includes a first sealing gasket body made of a water-swellable material, and the second connector 5 includes a second sealing gasket body made of a water-swellable material. During underground tunnel construction, groundwater leakage may occur, and the water-swellable material expands in volume upon contact with water, thereby improving the sealing effect.

[0035] In the prior art, a first groove and a second groove are opened on both sides of the shield segment. In this embodiment, grooves are opened on the four outer edges of the shield segment. For the shield segments on both sides of the splicing gap, a new shield segment splicing seam adaptive waterproofing device is pasted in the groove near the splicing seam of the second shield segment 14, and a first sealing gasket is pasted in the groove near the splicing seam of the first shield segment 15, which can effectively achieve a sealed connection.

[0036] In another embodiment provided by the present invention, preferably, the third connecting member 1 includes a sealing strip and an elastic metal sheet 3. The material of the sealing strip is a water-swelling material. The elastic metal sheet 3 is an elastic metal sheet, such as a flat metal strip, which has a certain degree of rigidity, thereby improving the strength of the third connecting member 1 while maintaining its elasticity, making the inverted teeth engage more tightly, and also improving the connection strength between the first connecting member and the second connecting member. Preferably, the cross-section of the elastic metal sheet 3 is arc-shaped, and there are multiple elastic metal sheets 3, and the multiple elastic metal sheets 3 are evenly arranged inside the sealing strip. The sealing strip is formed into a flat shell shape on the outside, and the length of the sealing strip is greater than the length of the shield segment joint 16.

[0037] In another embodiment provided by the present invention, further, a first inverted tooth 2 is provided at one end of the third connecting member 1, a second inverted tooth 13 is provided at the other end of the third connecting member 1, a third inverted tooth 18 is provided on the upper portion of the first sealing gasket body, and a fourth inverted tooth 17 is provided on the upper portion of the second sealing gasket body. The first inverted tooth 2 and the third inverted tooth 18 are meshed and connected with each other. The second inverted tooth 13 and the fourth inverted tooth 17 are meshed and connected with each other, and the meshing is tight, which facilitates installation and provides a good sealing effect. In addition, the tooth-shaped structure can maintain a certain sealing force while being able to slide relative to each other when the sealing force is excessive, thereby generating relative movement between the third connecting member and the second connecting member.

[0038] Furthermore, the tooth shapes of the second inverted teeth 13 and the fourth inverted teeth 17 are inclined toward the joint 16 of the two shield segments, and the tooth shapes of the first inverted teeth 2 and the third inverted teeth 18 are inclined away from the joint 16 of the two shield segments. The purpose of this arrangement is that when the two shield segments are misaligned to generate tension on the third connecting member, since the tooth shapes of the second inverted teeth 13 and the fourth inverted teeth 17 are inclined toward the joint 16 of the two shield segments, the two have a tendency to separate and are pulled by the tension to move relative to each other, thus achieving the aforementioned movable sealing connection. The tooth shapes of the first inverted teeth 2 and the third inverted teeth 18 are inclined toward the joint 16 away from the two shield segments, so that the tension will not cause displacement between the first connecting member and the third connecting member, that is, no relative position change will occur, and the inclination of the tooth shapes can ensure a good sealing effect even when the shield segments are misaligned.

[0039] In another embodiment provided by the present invention, further, a block is installed behind the second connecting member 5 and the third connecting member 1, and a clamping groove 4 is provided on the block, whose cross-section is groove-shaped. One end of the third connecting member 1 having the second inverted tooth 13 is placed in the upper part of the clamping groove 4, and the second sealing gasket body has the fourth inverted tooth 17 placed in the lower part of the clamping groove 4, that is, the second inverted tooth 13 and the fourth inverted tooth 17 are confined in the clamping groove 4. The clamping groove 4 confines the second connecting member 5 and the third connecting member 1 in the groove, so that the second connecting member 5 and the third connecting member 1 do not move up and down. Such a configuration improves the sealing degree of the second inverted tooth 13 and the fourth inverted tooth 17, and prevents the sealing degree from being reduced due to the relative movement of the two.

[0040] The new shield segment splicing seam adaptive waterproofing device provided by the embodiment of the present invention, when the segments are assembled, the first inverted teeth 2 provided at one end of the third connecting member 1 and the third inverted teeth 18 on the upper part of the first sealing gasket body squeeze each other, and the second inverted teeth 13 provided at the other end of the third connecting member 1 and the fourth inverted teeth 17 on the upper part of the second sealing gasket body squeeze each other, so that the curvature of the elastic metal sheet 3 is reduced during the assembly process, so that the elastic metal sheet 3 tends to restore its original shape. This tendency causes the elastic metal sheet 3 to exert a pressure on the third connecting member 1, and this pressure will make the first inverted teeth 2 provided at one end of the third connecting member 1 and the third inverted teeth 18 on the upper part of the first sealing gasket body more tightly engaged, and the second inverted teeth 13 provided at the other end of the third connecting member 1 and the fourth inverted teeth 17 on the upper part of the second sealing gasket body tightly engaged. As the assembly proceeds, the more obvious the tendency of the elastic metal sheet 3 to restore its original shape is, the greater the pressure it provides, the greater the bite force between the inverted teeth, and the better the sealing performance of the new shield segment splicing seam adaptive waterproofing device.

[0041] In another example provided by the present invention, the second connecting member 5 also includes an upper clamping piece 6 and a lower clamping piece 7, and the upper clamping piece 6 and the lower clamping piece 7 are both in the shape of thin sheets. The upper clamping piece 6 is movably connected to the third connecting member 1, and the lower clamping piece 7 is sealed and connected to the shield segment. The upper clamping piece 6 is also connected to the rear part of the card slot 4. A supporting connecting piece 8 is also provided between the upper clamping piece 6 and the lower clamping piece 7. A plurality of supporting connecting pieces 8 are evenly arranged along the length direction of the upper clamping piece 6 and the lower clamping piece 7. The supporting connecting piece 8 also has circular holes. The supporting connecting piece 8 connects the upper clamping piece 6 and the lower clamping piece 7, so that the entire waterproof device 19 is tightly connected internally. The lower clamping piece 7 is tightly connected to the shield segment so that the second connecting member 5 will not fall off when the shield segment is dislocated. The upper clamping piece 6 is movably connected to the third connecting member 1 so that it can still move with the shield segment when it is dislocated. A wing 11 is provided at the end of the upper clamping piece 6 facing away from the third connecting piece 1. The wing 11 is tightly adhered to the outer side of the pipe segment, so that the entire waterproof device is sealed and fits on the shield pipe segment. The purpose of such a setting is to allow the second connecting piece 5 to swing as a whole, thereby improving the sealing adaptability of the second connecting piece 5 to the relative movement between the shield pipe segments, and still achieving sealing within a larger range.

[0042] In another embodiment provided by the present invention, the upper clamping piece 6 and the lower clamping piece 7 are further rotatably connected via a rotating shaft 9. A torsion spring 10 is provided on the rotating shaft 9. The rotating shaft 9 passes through the supporting connecting piece 8 and the torsion spring 10 and is placed in a circular hole in the supporting connecting piece 8. The torsion spring 10 is evenly arranged on the rotating shaft 9. The two ends of the torsion spring 10 are in contact with and constrained by the upper clamping piece 6 and the lower clamping piece 7. When the new shield segment splicing seam adaptive waterproofing device comes into contact with water, the sealing strip, which is made of a water-swelling material, will expand, completely sealing the splicing seam 16 between the shield segments, forming secondary waterproofing. After the sealing strip expands in volume, the torque and rotational force of the torsion spring 10 exert pressure on the water-expanded sealing strip, causing the sealing strip to tightly seal the segment splicing seam 16. When the shield segment is misaligned or opened, the new shield segment splicing seam adaptive waterproof device can automatically rotate around the center of its torsion spring 8, and there is a free expansion and contraction effect between the first inverted tooth 2 on the third connecting part and the third inverted tooth 18 on the first sealing pad body and the second inverted tooth 13 and the fourth inverted tooth 17 in the slot 4, so that the new shield segment splicing seam adaptive waterproof device always fits tightly with the shield segment.

[0043] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A shield segment joint adaptive waterproof device, characterized in that: include: The first connecting piece and the second connecting piece are respectively and sealingly connected to the two spliced ​​shield segments in a one-to-one correspondence; The third connecting member has one end connected to the first connecting member and the other end movably and sealingly connected to the second connecting member. The tooth-shaped sealing structure further comprises a first inverted tooth, a second inverted tooth, a third inverted tooth and a fourth inverted tooth, wherein one end of the third connecting member is provided with a first inverted tooth, one end of the first connecting member is provided with a third inverted tooth, the first inverted tooth and the third inverted tooth are meshed and connected, the other end of the third connecting member is provided with a second inverted tooth, one end of the second connecting member is provided with a fourth inverted tooth, the second inverted tooth and the fourth inverted tooth are meshed and connected, the tooth shapes of the second inverted tooth and the fourth inverted tooth are inclined toward the direction of the splicing seam of the two shield segments, and the tooth shapes of the first inverted tooth and the third inverted tooth are inclined away from the direction of the splicing seam of the two shield segments, The connection structure between the third connecting member and the second connecting member is a reciprocating sealing structure. The two move relative to each other, but they still have a sealing effect after the movement. The third connection and the second connection piece are movable. When there is a misalignment between the two shield segments, the displacement difference caused by the misalignment is matched by the relative movement between the third connection and the second connection piece, so that efficient sealing can still be achieved after the misalignment.

2. The shield segment joint adaptive waterproof device according to claim 1 is characterized in that: A groove is provided on one of the shield segments, and the first connecting piece is bonded into the groove to achieve the sealed connection.

3. The shield segment joint adaptive waterproof device according to claim 1 is characterized in that: The third connecting member is integrated with an elastic metal sheet.

4. The shield segment joint adaptive waterproof device according to claim 1, characterized in that: The second connecting piece includes an upper holding clip and a lower holding clip, the upper holding clip and the lower holding clip are rotationally connected, the lower holding clip is sealingly connected to the shield segment, and the upper holding clip is connected to the third connecting piece.

5. The shield segment joint adaptive waterproof device according to claim 4 is characterized in that: A wing is provided on the end of the upper holding clamp facing away from the third connecting piece, and the wing is sealed and fitted on the shield segment.

6. The shield segment joint adaptive waterproof device according to claim 4, characterized in that: The upper holding clip and the lower holding clip are rotatably connected via a rotating shaft, and a torsion spring is provided on the rotating shaft.

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