Built-in water guide groove type shield segment caulking sealing strip and caulking structure

Abstract

The utility model discloses a built-in water chute type shield segment caulking sealing strip and caulking structure, including sealing strip caulking filling part and sealing strip lap joint sealing part, sealing strip caulking filling part is equipped with the sealing strip water guide cavity that runs through along the length direction, the both sides of sealing strip caulking filling part are symmetrically equipped with non-return structure, and the sealing strip caulking filling part is equipped with the sealing strip water guide cavity that runs through along the length direction. The inner surfaces of the two wings of the sealing strip lap joint sealing part are provided with adhesive glue used for bonding and fixing. The utility model is convenient and firm to install. The caulking sealing strip is internally provided with the water guide groove cavity, and the tail wing arc tension and the adhesive on the two sides of the sealing strip are convenient for caulking installation of the caulking groove and guarantee of the installation effect. The waterproof structure is high in waterproof reliability. The caulking sealing strip rebounds to be attached to the inner wall of the caulking groove after being plugged into the caulking groove, and the waterproof performance of caulking filling can be effectively improved through the caulking groove anti-falling groove opening and the sealing strip non-return structure. The utility model has the drainage function. According to the utility model, the structure surface joint water dripping and leaking risk is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel waterproofing, and in particular relates to a built-in water guide trough type shield segment caulking sealing strip and a caulking structure. Background Art

[0002] The shield tunnel lining is composed of several arc-shaped prefabricated concrete segments with the same inner and outer diameters. The segment lining ring width (along the longitudinal direction) is generally 1 to 2 meters, and they are continuously arranged along the tunnel line direction to form a tunnel structure. There will be a certain gap between the segments of the shield tunnel lining. Generally, a caulking groove is reserved on the inner side of the segment. After the segment assembly is completed, the caulking groove is reinforced, sealed and waterproofed.

[0003] Traditional caulking grooves are filled with colloids such as polysulfide sealants to achieve the purpose of waterproofing by filling the caulking grooves through the curing and expansion characteristics of the caulking materials. This sealing method uses manual caulking, and the filling quality control is difficult. At the same time, the joint leakage water accumulates in the joints of the pipe segments and cannot be discharged. As the leakage water pressure continues to increase, the caulking colloid is easily squeezed out.

[0004] In addition, the assembled shield lining rings may open or dislocate due to some external forces, causing the joints between the pipe segments to further increase. Traditional colloids do not have ductility after construction, and there is a risk of the caulking filling material falling off. Summary of the invention

[0005] The utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a built-in water guide trough type shield segment caulking sealing strip and a caulking structure.

[0006] The technical solution of the utility model is: a shield segment caulking sealing strip with a built-in water guide groove, comprising a sealing strip caulking filling part and a sealing strip lap sealing part, wherein the sealing strip caulking filling part is provided with a sealing strip water guide cavity which runs through along the length direction, check structures are symmetrically provided on both sides of the sealing strip caulking filling part, and the inner surfaces of the two wings of the sealing strip lap sealing part are provided with adhesive for bonding and fixing.

[0007] Furthermore, the cross section of the water-conducting cavity of the sealing strip is teardrop-shaped, and the water-conducting cavity of the sealing strip is longitudinally connected, with the large end of the teardrop-shaped cavity away from the overlapping sealing portion of the sealing strip and the small end of the teardrop-shaped cavity close to the overlapping sealing portion of the sealing strip.

[0008] Furthermore, the backstop structure includes a dovetail-shaped wing span near the front end and a lip-shaped protrusion at the waist, and the dovetail-shaped wing span is in contact with the wall of the caulking groove and extends outward.

[0009] Furthermore, the front end of the caulking filling portion of the sealing strip is provided with water seepage holes along the vertical length direction, the water seepage holes are connected with the water guiding cavity, and the water seepage holes are arranged equidistantly in the length direction.

[0010] Furthermore, the overlapping sealing portion of the sealing strip is in the shape of a butterfly tail wing, the outer surface cross-section of the overlapping sealing portion of the sealing strip is in the shape of an arc, and an arc-shaped transition is arranged between the overlapping sealing portion of the sealing strip and the sealing strip caulking filling portion.

[0011] Furthermore, the sealing strip caulking filling portion and the sealing strip overlapping sealing portion are integrally formed.

[0012] Furthermore, the sealing strip caulking filling portion and the sealing strip overlapping sealing portion are made of elastic material.

[0013] A caulking structure for a shield segment with a built-in water guide groove comprises a caulking groove for preventing falling off at the inner arc surface of a segment joint between two adjacent segments, a sealing strip is pressed into the groove through a notch of the caulking groove, a dovetail-shaped wing span and a lip-shaped protrusion of the sealing strip are tightly attached to the wall of the caulking groove through elastic extrusion, and a disc-shaped tail wing of the sealing strip is tightly attached to the inner arc surface of the segment through arc tension and adhesive.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model is easy to install and firm. The utility model has a built-in water guide groove cavity in the caulking sealing strip, and the tail arc tension and adhesive on both sides of the sealing strip facilitate the caulking groove caulking installation and ensure the installation effect.

[0016] The utility model has high waterproof reliability. After the caulking sealing strip of the utility model is caulked into the caulking groove, it rebounds and fits with the inner wall of the caulking groove. The anti-falling notch of the caulking groove and the sealing strip backstop structure can effectively improve the waterproof performance of the caulking filling.

[0017] The utility model has the function of drainage. The utility model caulking sealing strip is provided with water seepage holes and water guide cavities, which can drain the leakage water in the joints of shield segments to the drainage system inside the tunnel, thereby reducing the risk of water dripping from the joints on the surface of the structure and ensuring the use function of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the caulking groove in the utility model;

[0019] Figure 2 It is a structural schematic diagram of the caulking sealing strip in the utility model;

[0020] Figure 3 It is a connection schematic diagram of the caulking structure in the utility model;

[0021] in:

[0022] 1 shield segment 2 segment joint

[0023] 3 Caulking slots

[0024] 5 Sealing strip caulking filling part 6 Sealing strip lap sealing part

[0025] 7 Sealing strip Water guide cavity 8 Dovetail wingspan

[0026] 9 lip shaped protrusion 10 disc type tail wing

[0027] 11 Water seepage holes 12 Adhesive

[0028] 13 caulking groove wall 14 inner arc surface of pipe segment. DETAILED DESCRIPTION

[0029] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments:

[0030] like Figures 1 to 3 As shown, a shield segment caulking sealing strip with built-in water guide groove comprises a sealing strip caulking filling part 5 and a sealing strip lap sealing part 6, wherein the sealing strip caulking filling part 5 is provided with a sealing strip water guide cavity 7 which runs through along the length direction, and check structures are symmetrically provided on both sides of the sealing strip caulking filling part 5, and the inner surfaces of the two wings of the sealing strip lap sealing part 6 are provided with adhesive 12 for bonding and fixing.

[0031] The cross section of the sealing strip water-conducting cavity 7 is teardrop-shaped. The sealing strip water-conducting cavity 7 is longitudinally connected. The large end of the teardrop-shaped cavity is far away from the sealing strip lap seal portion 6, and the small end of the teardrop-shaped cavity is close to the sealing strip lap seal portion 6.

[0032] The backstop structure includes a dovetail-shaped wing span 8 near the front end and a lip-shaped protrusion 9 at the waist. The dovetail-shaped wing span 8 is in contact with the caulking groove wall 13 and extends outward.

[0033] The front end of the sealing strip caulking filling part 5 is provided with water seepage holes 11 along the vertical length direction, the water seepage holes 11 are connected with the water guiding cavity 7, and the water seepage holes 11 are arranged equidistantly in the length direction.

[0034] The sealing strip lap seal portion 6 is in the shape of a butterfly tail wing, and the outer surface cross-section of the sealing strip lap seal portion 6 is in the shape of an arc. An arc transition is provided between the sealing strip lap seal portion 6 and the sealing strip caulking filling portion 5 .

[0035] The sealing strip caulking filling portion 5 and the sealing strip overlapping sealing portion 6 are integrally formed.

[0036] The sealing strip caulking filling portion 5 and the sealing strip overlapping sealing portion 6 are made of elastic material.

[0037] Specifically, the cross section of the lip-shaped protrusion 9 is conical.

[0038] As a variant implementation, the cross section of the lip-shaped protrusion 9 is elliptical.

[0039] Specifically, the water seepage holes 11 are arranged along the center line of the sealing strip.

[0040] Specifically, Figure 2 As shown, the front end of the sealing strip caulking filling portion 5 forms an arc-shaped head, and both sides of the arc-shaped head extend to form a dovetail-shaped wingspan 8, and the dovetail-shaped wingspan 8 on both sides are bilaterally symmetrical.

[0041] Specifically, a deformation space is formed between the dovetail wingspan 8 and the lip-shaped protrusion 9. After the sealing strip is installed into the caulking groove 3, the dovetail wingspan 8 will elastically deform toward the overlapping sealing portion 6 of the sealing strip, and the lip-shaped protrusion 9 will also elastically deform toward the overlapping sealing portion 6 of the sealing strip, thereby achieving double sealing of the groove walls on both sides of the caulking groove 3.

[0042] Similarly, the arc-shaped head of the sealing strip caulking filling portion 5 can also perform elastic pressure sealing on the caulking groove 3 .

[0043] Specifically, the sealing strip water-conducting cavity 7 can provide a water-conducting space that runs through in the length direction, and can also provide a deformation basis for the arc-shaped head of the sealing strip caulking filling portion 5 .

[0044] Specifically, the cross section of the overlapping sealing portion 6 of the sealing strip is thick in the middle and thin at both sides, so as to achieve a smooth transition of the inner arc surface 14 of the pipe segment.

[0045] Specifically, Figure 2 As shown, the caulking sealing strip can be but not limited to a compressible elastic rubber material, the caulking sealing strip has a built-in "water drop-shaped" sealing strip water guide cavity 7, and check structures are symmetrically provided on both sides, with the function of "forward extrusion, reverse check"; the front end of the caulking sealing strip is provided with equidistantly distributed seepage holes 11 along the longitudinal direction, which can collect the leaked water in the segment joint 2 of the shield segment 1 into the sealing strip water guide cavity 7 for centralized drainage; the sealing strip lap sealing portion 6 adopts a disc-shaped tail wing 10 with an arc-shaped outer surface, and is provided with an adhesive 12.

[0046] A caulking structure for a shield segment with a built-in water guide groove comprises a caulking groove 3 for preventing falling off at the inner arc surface of a segment joint 2 between two adjacent segments, a sealing strip is pressed into the groove through the notch of the caulking groove 3, a dovetail-shaped wing span 8 and a lip-shaped protrusion 9 of the sealing strip are tightly attached to the caulking groove wall 13 through elastic extrusion, and a disc-shaped tail wing 10 of the sealing strip is tightly attached to the inner arc surface 14 of the segment through arc tension and adhesive 12.

[0047] Specifically, Figure 1 As shown, the caulking groove 3 is an anti-falling groove structure, and the inner wall of the caulking groove 3 is in a broken line shape, forming an annular cavity structure that is wide inside and narrow outside, that is, the inner cavity of the groove is larger than the groove opening, thereby achieving anti-falling through the specific shape.

[0048] Specifically, Figure 3As shown, the arc-shaped head of the sealing strip caulking filling portion 5 is in close contact with the expanded groove wall of the caulking groove 3, and the dovetail wingspan 8 and the lip-shaped protrusion 9 are in close contact with the closed groove wall of the caulking groove 3.

[0049] Specifically, the caulking sealing strip is extruded and inserted into the caulking groove 3, and the caulking filling part 5 of the sealing strip is subjected to elastic compression so that its dovetail wingspan 8 and lip-shaped protrusion 9 are tightly attached to the groove wall of the caulking groove 3, and the butterfly tail wing 10 of the lap sealing part 6 of the sealing strip is tightly attached to the inner arc surface 14 of the pipe segment through arc tension and adhesive 12.

[0050] Specifically, Figure 3 As shown, in some cases, leakage and water accumulation occur in the segment joints 2. Under the action of the water pressure in the joints, the non-return structure of the sealing strip caulking filling part 5 and the caulking groove 3 structure can ensure that the sealing strip is fixed in the caulking groove and does not fall off, and the leakage and accumulated water enters the sealing strip water guide cavity 7 through the seepage holes 11 of the sealing strip and is introduced into the internal drainage system of the tunnel.

[0051] The utility model can ensure that the caulking sealing strip does not fall off when the segment joints 2 are opened and misaligned to a certain extent; adopts a standardized structure to simplify the caulking groove sealing process, improves the construction quality and waterproof effect; follows the tunnel drainage design concept of "prevention, interception and drainage, comprehensive management", drains the joint leakage water, reduces the water pressure on the caulking, avoids the risk of caulking material falling off, and maintains the safety of tunnel operation.

Claims

1. A shield segment caulking sealing strip with built-in water guide groove, characterized in that: The invention comprises a sealing strip caulking filling portion (5) and a sealing strip lap sealing portion (6), wherein the sealing strip caulking filling portion (5) is provided with a sealing strip water guide cavity (7) which runs through in the length direction, and check structures are symmetrically provided on both sides of the sealing strip caulking filling portion (5), and the inner surfaces of both wings of the sealing strip lap sealing portion (6) are provided with adhesive (12) for bonding and fixing.

2. The shield segment caulking sealing strip with built-in water guide groove according to claim 1, characterized in that: The sealing strip water-conducting cavity (7) has a teardrop-shaped cross section, and the sealing strip water-conducting cavity (7) is longitudinally continuous, with the large end of the teardrop-shaped cavity being away from the sealing strip lap seal portion (6) and the small end of the teardrop-shaped cavity being close to the sealing strip lap seal portion (6).

3. The shield segment caulking sealing strip with built-in water guide groove according to claim 1, characterized in that: The backstop structure comprises a dovetail-shaped wing span (8) close to the front end and a lip-shaped protrusion (9) at the waist, wherein the dovetail-shaped wing span (8) is in contact with the caulking groove wall (13) and extends outward.

4. The shield segment caulking sealing strip with built-in water guide groove according to claim 1, characterized in that: The front end of the sealing strip caulking filling portion (5) is provided with water seepage holes (11) along the vertical length direction, the water seepage holes (11) are connected to the water guide cavity (7), and the water seepage holes (11) are arranged at equal distances in the length direction.

5. The shield segment caulking sealing strip with built-in water guide groove according to claim 1, characterized in that: The sealing strip overlap seal portion (6) is in the shape of a butterfly tail wing, the outer surface cross-section of the sealing strip overlap seal portion (6) is in the shape of an arc, and an arc-shaped transition is provided between the sealing strip overlap seal portion (6) and the sealing strip caulking filling portion (5).

6. The shield segment caulking sealing strip with built-in water guide groove according to claim 1, characterized in that: The sealing strip caulking filling portion (5) and the sealing strip lap sealing portion (6) are integrally formed.

7. The shield segment caulking sealing strip with built-in water guide groove according to claim 1, characterized in that: The sealing strip caulking filling portion (5) and the sealing strip overlapping sealing portion (6) are made of elastic material.

8. A caulking structure for a shield segment with a built-in water guide channel, characterized in that: The invention comprises a caulking groove (3) for preventing falling off at the inner arc surface of the joint (2) between two adjacent segments, a sealing strip is pressed into the groove through the notch of the caulking groove (3), a dovetail-shaped wing span (8) of the sealing strip, a lip-shaped protrusion (9) and a wall (13) of the caulking groove are tightly attached to each other through elastic extrusion, and a disc-shaped tail wing (10) of the sealing strip is tightly attached to the inner arc surface (14) of the segment through arc tension and adhesive (12).

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