Joint waterproof structure of shield tunnel duct piece

Abstract

The utility model discloses a joint waterproof structure of shield tunnel segments, which relates to the technical field of joint structures, and comprises a first sealing strip and a second sealing strip, the first sealing strip is arranged on one side of a gap formed between two spliced shield tunnel segments; the second sealing strip is arranged on the other side of a gap formed between the two spliced shield tunnel segments; the third sealing strip is arranged in a gap formed between the two spliced shield tunnel segments; the two sealing gaskets are arranged in a first clamping groove in the side wall of a gap formed between the two spliced shield tunnel segments. And the fourth sealing strip is arranged in a gap formed between the two spliced shield tunnel segments. According to the utility model, underground seepage water can be isolated outside the joint formed by the two adjacent shield tunnel segments, so that the underground seepage water is prevented from entering the tunnel through the joint, and the structural stability of the shield tunnel segments at the joint is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of joint structures, in particular to a joint waterproof structure of a shield tunnel segment. Background Art

[0002] my country boasts the world's largest and fastest tunnel construction. The vast majority of tunnels are constructed using the shield method, which boasts a high degree of mechanization, a favorable working environment, and safe and efficient construction. Due to the influence of groundwater, tunnel waterproofing is a key factor in successful construction. In future cross-strait channel construction in my country, tunnel designs will face extremely high water pressures exceeding 150mPa.

[0003] The shield tunnel lining structure is composed of curved segments bolted together circumferentially into rings, and then bolted together longitudinally with inter-ring bolts. Joints exist between the segments, both circumferentially and longitudinally. Shield tunnels are buried within the strata and surrounded by groundwater. Due to the numerous joints in the segmental lining structure, waterproofing these joints becomes both a key and challenging aspect of waterproofing.

[0004] Existing joint waterproofing structures typically use waterproof strips embedded in the joints to prevent water from seeping inward along the joints and into the tunnel. However, once water enters the joints, it can still enter the tunnel through gaps or pores between the waterproof strips and the shield tunnel segments. Furthermore, this water can loosen the shield tunnel segments on both sides of the joint, exacerbating groundwater leakage.

[0005] Therefore, those skilled in the art provide a shield tunnel segment joint waterproof structure to solve the problems raised in the above background technology. Utility Model Content

[0006] The utility model provides a shield tunnel segment joint waterproof structure that can isolate underground water seepage outside the joint formed by two adjacent shield tunnel segments to prevent underground water seepage from entering the tunnel through the joint and ensure the structural stability of the shield tunnel segments at the joint.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] The utility model provides a shield tunnel segment joint waterproof structure, comprising:

[0009] a first sealing strip, the first sealing strip being provided on one side of a gap formed between two spliced ​​shield tunnel segments;

[0010] a second sealing strip, the second sealing strip being provided on the other side of a gap formed between two spliced ​​shield tunnel segments;

[0011] At least two third sealing strips, the third sealing strips being arranged in a gap formed between two spliced ​​shield tunnel segments;

[0012] At least two sealing gaskets, the two sealing gaskets being arranged in first grooves on the side walls of a gap formed between two spliced ​​shield tunnel segments;

[0013] At least two fourth sealing strips are provided between the gaps formed between the two spliced ​​shield tunnel segments and on the inner sides of the corresponding sealing pads.

[0014] Furthermore, the first sealing strip includes a first sealing strip body, a middle portion of one side of the first sealing strip body protrudes outward to form a first protrusion, and the first protrusion is adapted to a second groove at the end of a gap formed between two spliced ​​shield tunnel segments;

[0015] The side surface of the first sealing strip body close to the shield tunnel segment protrudes outward to form a symmetrical first anchor body.

[0016] Furthermore, the side surface of the first sealing strip body is connected to the side surface of the shield tunnel segment through a first cement-based self-adhesive adhesive.

[0017] Furthermore, the second sealing strip includes a second sealing strip body, a middle portion of one side of the second sealing strip body protrudes outward to form a second protrusion, a top surface of the second protrusion is recessed inward to form an arc-shaped groove, and the second protrusion is embedded in a third groove at the end of a gap formed between two spliced ​​shield tunnel segments;

[0018] The two side surfaces of the second sealing strip body close to the shield tunnel segment both protrude outwards to form symmetrical second anchor bodies.

[0019] Furthermore, the two side surfaces of the second sealing strip body are respectively connected to the shield tunnel segment and the concrete lining through a second cement-based self-adhesive adhesive.

[0020] Furthermore, the third sealing strip is arranged between the first sealing strip body and the second sealing strip body, and the third sealing strip is embedded in the fourth groove at the end of the gap formed between the two shield tunnel segments.

[0021] Furthermore, the side surface of the sealing gasket close to the bottom of the first slot is recessed inward to form a plurality of bottom holes;

[0022] A plurality of central through holes are provided on the front side surface of the sealing gasket, and the central through holes are arranged close to the plurality of bottom holes.

[0023] Furthermore, a top hole is provided on the sealing gasket and located on a side of the central through hole away from the bottom hole, and side holes are also provided on the sealing gasket and located on both sides of the central through hole.

[0024] Furthermore, both sides of the sealing gasket close to the top hole are respectively recessed inward to form grooves.

[0025] Furthermore, the fourth sealing strip is clamped in a fifth clamping groove on the gap formed between two shield tunnel segments, and the fifth clamping groove is connected to the corresponding first clamping groove.

[0026] In the above technical scheme, the utility model provides a joint waterproof structure for shield tunnel segments, which has the following beneficial effects: the application improves the uniformity of contact pressure stress between shield tunnel segments through the joint waterproof system composed of the above-mentioned multi-channel sealing structure, so as to reduce the ratio of the sealing pressure of the sealing structure to the waterproof pressure, thereby improving the problem of reduced waterproof ability of sealing materials such as rubber due to creep and stress relaxation; by improving the uniformity of contact pressure stress, on the premise of achieving the same waterproof ability, the problem of reduced waterproof ability of sealing materials such as rubber due to creep and stress relaxation is greatly improved, and the service life of the joint waterproof system under the waterproof pressure is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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 recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0028] Figure 1 A front view of a shield tunnel segment joint waterproof structure provided by an embodiment of the utility model;

[0029] Figure 2 for Figure 1 A front view of the sealing gasket;

[0030] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0031] Figure 4 for Figure 1 A schematic diagram of the enlarged structure of the middle B part;

[0032] Figure 5 for Figure 1 A schematic diagram of the enlarged structure of the middle C part;

[0033] Figure 6 for Figure 1 Schematic diagram of the enlarged structure of part D in the middle.

[0034] Description of reference numerals:

[0035] 10. First sealing strip; 11. First sealing strip body; 12. First protrusion; 13. First anchoring body; 14. First cement-based self-adhesive;

[0036] 20. Shield tunnel segment; 21. Gap; 22. First slot; 23. Second slot; 24. Third slot; 25. Fourth slot; 26. Fifth slot;

[0037] 30. Second sealing strip; 31. Second sealing strip body; 32. Second protrusion; 33. Arc groove; 34. Second anchoring body; 35. Second cement-based self-adhesive;

[0038] 40. Third sealing strip;

[0039] 50. Sealing gasket; 51. Bottom hole; 52. Center through hole; 53. Top hole; 54. Side hole; 55. Groove;

[0040] 60. The fourth sealing strip. DETAILED DESCRIPTION

[0041] 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.

[0042] See also Figure 1-6 As shown;

[0043] The present invention provides a shield tunnel segment joint waterproof structure, comprising:

[0044] A first sealing strip 10 is provided on one side of a gap 21 formed between two spliced ​​shield tunnel segments 20;

[0045] A second sealing strip 30, which is provided on the other side of the gap 21 formed between the two spliced ​​shield tunnel segments 20;

[0046] At least two third sealing strips 40, each of which is disposed between the gaps 21 formed between two spliced ​​shield tunnel segments 20;

[0047] At least two sealing gaskets 50, the two sealing gaskets 50 are arranged in the first grooves 22 on the side walls of the gap 21 formed between the two spliced ​​shield tunnel segments 20;

[0048] At least two fourth sealing strips 60 are provided between the gaps 21 formed between the two spliced ​​shield tunnel segments 20 and on the inner sides of the corresponding sealing pads 50 .

[0049] The present application uses a first sealing strip 10, a second sealing strip 30, a third sealing strip 40, a sealing gasket 50 and a fourth sealing strip 60 to splice the shield tunnel segments 20 and improve the sealing performance. The first sealing strip 10 and the second sealing strip 30 are bonded to the end face of the shield tunnel segment 20 for fixation, and the three sealing strips 40, the sealing gasket 50 and the fourth sealing strip 60 arranged in pairs are in contact and pressed during the assembly and docking process of the shield tunnel segments 20; the uniformity of the contact pressure stress between the shield tunnel segments 20 is improved to achieve a reduction in the ratio of the sealing pressure of the sealing structure to the waterproof pressure, thereby improving the problem of reduced waterproof ability of sealing materials such as rubber due to creep and stress relaxation.

[0050] The first sealing strip 10 includes a first sealing strip body 11. A middle portion of one side of the first sealing strip body 11 protrudes outward to form a first protrusion 12. The first protrusion 12 is adapted to fit into a second slot 23 at the end of a gap formed between two spliced ​​shield tunnel segments 20.

[0051] The side surface of the first sealing strip body 10 close to the shield tunnel segment 20 protrudes outward to form a symmetrical first anchor body 13.

[0052] The side surface of the first sealing strip body 11 is connected to the side surface of the shield tunnel segment 20 through the first cement-based self-adhesive adhesive 14 .

[0053] The first anchoring body 13 can ensure a stable connection between the first sealing strip 10 and the shield tunnel segment 20 , thereby ensuring the waterproof effect of the first sealing strip 10 on the gap 21 .

[0054] The second sealing strip 30 includes a second sealing strip body 31. A middle portion of one side of the second sealing strip body 31 protrudes outward to form a second protrusion 32. The top surface of the second protrusion 32 is recessed inward to form an arc-shaped groove 33. The second protrusion 32 is embedded in the third groove 24 at the end of the gap formed between the two spliced ​​shield tunnel segments 20.

[0055] The two side surfaces of the second sealing strip body 31 close to the shield tunnel segment 20 both protrude outwards to form symmetrical second anchor bodies 34 .

[0056] The two side surfaces of the second sealing strip body 31 are respectively connected to the shield tunnel segment 20 and the concrete lining through the second cement-based self-adhesive adhesive 35 .

[0057] The second anchor body 34 can ensure a stable connection between the second sealing strip body 31 and the concrete lining, while ensuring the waterproof effect of the second sealing strip body 31 on the gap 21 through the second cement-based self-adhesive 35 and the shield tunnel segment 20 and the concrete lining.

[0058] The arc groove 33 at the top of the second protrusion 32 makes the second sealing strip body 31 symmetrically arranged about the center line of the gap between two adjacent shield tunnel segments 20. The second sealing strip body 31 is evenly pressurized. The arc groove 33 can be used to drain water leaking from the shield tunnel segments 20 along the caulking groove 3 along the tunnel wall to the drainage system inside the tunnel.

[0059] The third sealing strip 40 is disposed between the first sealing strip body 11 and the second sealing strip body 31 , and is embedded in the fourth slot 25 at the end of the gap formed between the two shield tunnel segments 20 .

[0060] The two third sealing strips 40 are contacted and squeezed through the fourth slot 25 to improve the uniformity of the contact pressure stress between the shield tunnel segments 20, so as to reduce the ratio of the sealing pressure of the sealing structure to the waterproof pressure, thereby improving the problem of reduced waterproof ability of sealing materials such as rubber due to creep and stress relaxation.

[0061] The side surface of the sealing gasket 50 close to the bottom of the first slot 22 is recessed inward to form a plurality of bottom holes 51;

[0062] A plurality of central through holes 52 are formed on the front side of the sealing gasket 50 , and the central through holes 52 are arranged close to the plurality of bottom holes 51 .

[0063] A top hole 53 is formed on the sealing gasket 50 and located on a side of the central through hole 52 away from the bottom hole 51 . Side holes 54 are also formed on both sides of the central through hole 52 of the sealing gasket 50 .

[0064] Both sides of the sealing gasket 50 near the top hole 53 are respectively recessed inward to form grooves 55 .

[0065] The side surfaces of two adjacent shield tunnel segments 20 are both provided with first card grooves 22, so a pair of sealing gaskets 50 are respectively embedded in one of the first card grooves 22, so that the lower surface of the sealing gasket 50 is in contact with the bottom wall of the first card groove 22, and the facing sides of the pair of sealing gaskets 50 are in contact with each other. The sealing gaskets 50 themselves are generally made of rubber elastic material. Under the action of elasticity, the pair of sealing gaskets 50 initially produce mutual extrusion to block and seal the joints between the shield tunnel segments 20, thereby improving the waterproof performance and reducing the risk of leakage. Since the sealing gasket 50 will be deformed when squeezed, the length of the groove 55 of the sealing gasket 50 in the vertical section is made smaller than the depth of the first groove 22 on the shield tunnel segment 20, that is, the length of the side wall of the first groove 22 in the vertical section, so that a certain gap is left between the outer side of the sealing gasket 50 and the shield tunnel segment 20, thereby preventing the sealing gasket 50 from directly squeezing into the joint of the shield tunnel segment 20 after being compressed, thereby ensuring the waterproof capability and ensuring that the sealing gasket 50 can completely fill the first groove 22 after being compressed, thereby improving the assembly quality of the shield tunnel segment 20.

[0066] The fourth sealing strip 60 is clamped in the fifth clamping groove 26 on the gap 21 formed between the two shield tunnel segments 20 , and the fifth clamping groove 26 is connected to the corresponding first clamping groove 22 .

[0067] The two fourth sealing strips 60 are contacted and squeezed through the fifth slot 26 to improve the uniformity of the contact pressure stress between the shield tunnel segments 20, so as to reduce the ratio of the sealing pressure of the sealing structure to the waterproof pressure, thereby improving the problem of reduced waterproof ability of sealing materials such as rubber due to creep and stress relaxation.

[0068] The third sealing strip 40, the sealing gasket 50 and the fourth sealing strip 60 are all arranged in pairs and opposite to each other, that is, one third sealing strip 40, one sealing gasket 50 and one fourth sealing strip 60 are respectively arranged in the fourth slot 25, the first slot 22 and the fifth slot 26 on one shield tunnel segment 20, and another third sealing strip 40, another sealing gasket 50 and another fourth sealing strip 60 are respectively arranged in the fourth slot 25, the first slot 22 and the fifth slot 26 on another shield tunnel segment 20, thereby forming a symmetrical structure.

[0069] The present application improves the uniformity of the contact pressure stress between 20 shield tunnel segments through the joint waterproofing system composed of the above-mentioned multi-channel sealing structure, so as to reduce the ratio of the sealing pressure of the sealing structure to the design waterproofing pressure, thereby improving the problem of reduced waterproofing ability of rubber and other sealing materials due to creep and stress relaxation; by improving the uniformity of the contact pressure stress, while achieving the same waterproofing ability, the problem of reduced waterproofing ability of rubber and other sealing materials due to creep and stress relaxation is greatly improved, and the service life of the joint waterproofing system under the design waterproofing pressure is extended.

[0070] Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and the specification are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A shield tunnel segment joint waterproof structure, characterized in that: include: A first sealing strip (10), the first sealing strip (10) being arranged on one side of a gap (21) formed between two spliced ​​shield tunnel segments (20); A second sealing strip (30), the second sealing strip (30) being arranged on the other side of a gap (21) formed between two spliced ​​shield tunnel segments (20); At least two third sealing strips (40), the third sealing strips (40) being arranged between gaps (21) formed between two spliced ​​shield tunnel segments (20); At least two sealing gaskets (50), the two sealing gaskets (50) being arranged in first grooves (22) on the side walls of a gap (21) formed between two spliced ​​shield tunnel segments (20); At least two fourth sealing strips (60), the fourth sealing strips (60) being arranged between gaps (21) formed between two spliced ​​shield tunnel segments (20) and located on the inner sides of corresponding sealing pads (50).

2. The shield tunnel segment joint waterproof structure according to claim 1, characterized in that: The first sealing strip (10) comprises a first sealing strip body (11), a middle portion of one side of the first sealing strip body (11) protrudes outward to form a first protrusion (12), and the first protrusion (12) is adapted to a second slot (23) at the end of a gap formed between two spliced ​​shield tunnel segments (20); The side surface of the first sealing strip body (11) close to the shield tunnel segment (20) protrudes outward to form a symmetrical first anchor body (13).

3. The shield tunnel segment joint waterproof structure according to claim 2, characterized in that: The side surface of the first sealing strip body (11) is connected to the side surface of the shield tunnel segment (20) via a first cement-based self-adhesive glue (14).

4. The shield tunnel segment joint waterproof structure according to claim 3, characterized in that: The second sealing strip (30) comprises a second sealing strip body (31), a middle portion of one side of the second sealing strip body (31) protrudes outward to form a second convex block (32), a top surface of the second convex block (32) is recessed inward to form an arc-shaped groove (33), and the second convex block (32) is embedded in a third slot (24) at the end of a gap formed between two spliced ​​shield tunnel segments (20); Both side surfaces of the second sealing strip body (31) close to the shield tunnel segment (20) protrude outwards to form symmetrical second anchor bodies (34).

5. The shield tunnel segment joint waterproof structure according to claim 4, characterized in that: The two side surfaces of the second sealing strip body (31) are respectively connected to the shield tunnel segment (20) and the concrete lining via a second cement-based self-adhesive adhesive (35).

6. The shield tunnel segment joint waterproof structure according to claim 5, characterized in that: The third sealing strip (40) is arranged between the first sealing strip body (11) and the second sealing strip body (31), and the third sealing strip (40) is embedded in a fourth clamping groove (25) at the end of a gap formed between two shield tunnel segments (20).

7. The shield tunnel segment joint waterproof structure according to claim 1, characterized in that: The side surface of the sealing gasket (50) close to the bottom of the first slot (22) is recessed inward to form a plurality of bottom holes (51); A plurality of central through holes (52) are provided on the front side of the sealing gasket (50), and the central through holes (52) are arranged close to the plurality of bottom holes (51).

8. The shield tunnel segment joint waterproof structure according to claim 7, characterized in that: A top hole (53) is provided on the sealing gasket (50) and is located on a side of the central through hole (52) away from the bottom hole (51). Side holes (54) are also provided on both sides of the central through hole (52) on the sealing gasket (50).

9. The shield tunnel segment joint waterproof structure according to claim 8, characterized in that: Both sides of the sealing gasket (50) close to the top hole (53) are respectively recessed inwards to form grooves (55).

10. The shield tunnel segment joint waterproof structure according to claim 1, characterized in that: The fourth sealing strip (60) is clamped in a fifth clamping groove (26) at the end of a gap (21) formed between two shield tunnel segments (20), and the fifth clamping groove (26) is connected to the corresponding first clamping groove (22).

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