Steel plate self-adhesive waterstop for railway tunnel circumferential seam

Abstract

The utility model discloses a steel plate self-adhesive waterstop for a railway tunnel circumferential seam. The steel plate self-adhesive waterstop for the railway tunnel circumferential seam sequentially comprises a steel plate base material layer, a self-adhesive layer, an isolation protection layer and an enhancement layer, wherein the steel plate base material layer is used for enhancing the mechanical occlusal force with concrete; the self-adhesive layer is used for being bonded with a concrete structure; the self-adhesive layers are arranged on the surfaces of the front side and the back side of the steel plate base material layer, the isolation protection layers cover the outer surfaces of the self-adhesive layers, and the enhancement layers are arranged between the steel plate base material layer and the self-adhesive layers. According to the steel plate self-adhesive water-stop belt for the railway tunnel circumferential seam, through a protection system of mechanical occlusion of the steel plate base material layer, tearing resistance of the reinforcing layer and chemical bonding of the self-adhesive glue layer, the problems of bonding failure and tearing leakage of a traditional water-stop belt in the high-water-pressure and strong-vibration environment are solved. Wherein the built-in design of the reinforcing layer remarkably improves the interlayer cooperative stress performance, and the waterproof structure is suitable for the waterproof engineering of the high-speed railway tunnel circumferential seam.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building water stop waterproof material, more particularly to a kind of steel plate self-adhesive water stop band for railway tunnel circumferential joint. BACKGROUND

[0002] In railway tunnel engineering, the waterproof sealing of circumferential construction joint is the core link to ensure the durability of tunnel structure and the safety of operation. Traditional water stop band is mostly made of rubber or plastic material, which is combined with concrete by pre-embedding method, but there are the following technical bottlenecks: insufficient mechanical bite: ordinary rubber water stop band relies on the physical embedding of surface concave-convex texture and concrete, which is prone to interface peeling under the action of long-term water pressure (>0.8MPa) and freeze-thaw cycle, resulting in leakage risk;

[0003] Weak tear resistance: pure glue water stop band is prone to tearing due to stress concentration when the joint deforms (settlement or expansion), especially under dynamic load of tunnel (such as train vibration), and the crack propagation rate increases significantly.

[0004] Therefore, how to provide a new type of composite water stop band, which realizes reliable mechanical anchoring and long-term durability through the synergistic innovation of material and structure, is a problem that technicians in the field need to solve. SUMMARY

[0005] Therefore, the utility model provides a kind of steel plate self-adhesive water stop band for railway tunnel circumferential joint.

[0006] To achieve the above purpose, the utility model provides the following technical scheme,

[0007] The utility model relates to a kind of steel plate self-adhesive water stop band for railway tunnel circumferential joint, comprising: the water stop band body of multilayer composite structure;

[0008] The water stop band body includes in sequence: steel plate base material layer for enhancing the mechanical bite with concrete, self-adhesive glue layer for bonding with concrete structure, isolation protective layer for protecting self-adhesive glue layer, and reinforcing layer for improving the tear resistance of the water stop band body;

[0009] The self-adhesive glue layer is arranged on the front and back surfaces of the steel plate base material layer, the isolation protective layer covers the outer surface of the self-adhesive glue layer, and the reinforcing layer is arranged between the steel plate base material layer and the self-adhesive glue layer.

[0010] Preferably, the steel plate base material layer is arranged at the innermost side of the water stop band body, and the steel plate base material layer is preferably a perforated steel plate.

[0011] Preferably, the holes of the perforated steel plate are uniformly distributed along the extension direction of the circumferential joint, and the holes of the perforated steel plate are distributed in a diamond array.

[0012] Preferably, the self-adhesive layer adopts butyl rubber self-adhesive or modified asphalt self-adhesive.

[0013] Preferably, the reinforcing layer adopts a polyester fiber mesh cloth and is bonded to the steel plate base material layer through a hot pressing composite process.

[0014] Preferably, the isolation protective layer is a peelable polyethylene film or a polypropylene film, and the isolation protective layer is covered on the outer surface of the self-adhesive layer through electrostatic adsorption or light gluing.

[0015] Through the above technical solution, compared with the prior art, the utility model discloses a kind of steel plate self-adhesive waterstop for railway tunnel circumferential joint, which is provided with steel plate base material layer, reinforcing layer and self-adhesive layer, and the reinforcing layer is arranged between the steel plate base material layer and the self-adhesive layer, and the reinforcing layer is arranged in the circumferential joint of the steel plate base material layer, and the reinforcing layer is arranged in the circumferential joint of the steel plate base material layer. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0017] Fig. 1 The accompanying drawings are schematic diagrams of the main cross-sectional structure of the present application.

[0018] Fig. 2 The accompanying drawings are schematic diagrams of the steel plate base material layer structure of the waterstop body of the present application. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the present application will be described clearly and completely in the following by combining the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] As Figs. 1-2The utility model discloses a steel plate self-adhesion waterstop for railway tunnel circumferential joint, including multilayer composite structure's waterstop body 100, waterstop body 100 sets up along the extension direction of railway tunnel circumferential joint,

[0021] Waterstop body 100 includes in proper order: steel plate base material layer 10 for enhancing the mechanical bite force with concrete, self-adhesion adhesive layer 30 for bonding with concrete structure, isolation protective layer 40 for protecting self-adhesion adhesive layer 30 and reinforcing layer 20 for promoting the tear resistance of waterstop body,

[0022] Self-adhesion adhesive layer 30 is arranged on the front and back surfaces of steel plate base material layer 10, isolation protective layer 40 is covered on the outer surface of self-adhesion adhesive layer 30, and reinforcing layer 20 is arranged between steel plate base material layer 10 and self-adhesion adhesive layer 30.

[0023] Waterstop body 100 is provided with a deformation zone in the middle, the innermost side of waterstop body 100 is steel plate base material layer 10, steel plate base material layer 10 is perforated steel plate, the holes 11 of perforated steel plate are uniformly distributed along the extension direction of circumferential joint, and the holes 11 of perforated steel plate are 8-12mm in diameter and are distributed in a diamond array, the holes are filled with grout during concrete pouring to form anchor bolt type mechanical connection to form embedded mechanical bite connection structure with concrete.

[0024] Further, self-adhesion adhesive layer 30 arranged on the front and back surfaces of steel plate base material layer 10 adopts butyl rubber self-adhesion adhesive or modified asphalt self-adhesion adhesive, nanoscale silicon dioxide filler and anti-aging agent are added in the adhesive layer to keep the adhesive property in the temperature range of-40 DEG C to 80 DEG C, the initial adhesive strength of the adhesive layer to C30 concrete is greater than or equal to 0.8MPa, and the adhesive strength retention rate after 7 days of water immersion is greater than or equal to 90%.

[0025] Further, reinforcing layer 20 arranged between steel plate base material layer 10 and self-adhesion adhesive layer 30 adopts polyester fiber mesh cloth and is bonded with steel plate base material layer 10 through hot-pressing composite process.

[0026] Further, isolation protective layer 40 covered on the outer surface of self-adhesion adhesive layer 30 is peelable polyethylene film or polypropylene film, isolation protective layer 40 is covered on the outer surface of self-adhesion adhesive layer 30 through electrostatic adsorption or light gluing, and the isolation protective layer is torn along the circumferential joint direction during construction, so that self-adhesion adhesive layer 30 can be directly bonded with the concrete structures on both sides, the peeling force is controlled to be 5-15N / 25mm, and construction operation is facilitated.

[0027] In use, the steel plate self-adhesive water stop belt is placed at the circumferential construction joint, the concrete surface floating slurry and oil stains on both sides of the circumferential joint are removed, washed by a high-pressure water gun and dried to a water content of less than or equal to 8%. The isolation protective layer is symmetrically torn on both sides, the water stop belt body is pressed on the concrete surface, a rubber hammer is used for uniform knocking, the self-adhesive layer is ensured to be attached to the base surface at a rate of greater than or equal to 95%, adjacent water stop belts are fixed by bolts or lap bonding, the joint is filled and leveled by sealant (such as polyurethane sealant), and after 24 hours of construction, the bonding force is detected by using the air pressure method (the detection pressure is 0.1 MPa, and the pressure drop is less than or equal to 5% to be qualified).

[0028] The steel plate self-adhesive water stop belt for a railway tunnel circumferential joint of the utility model solves the problems of bonding failure, tearing and leakage of a traditional water stop belt in a high water pressure and strong vibration environment through a steel plate base material layer mechanical bite, a reinforcing layer tear resistance and a self-adhesive glue layer chemical bonding protection system. The built-in design of the reinforcing layer significantly improves the interlayer cooperative stress performance and is suitable for high-speed railway tunnel circumferential joint waterproof engineering.

[0029] The above description of disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel sheet self-adhesive waterstop band for railway tunnel circumferential joints, characterized in that, The application relates to a waterstop body (100) of a multi-layer composite structure. The waterstop body (100) comprises a steel plate base material layer (10) for enhancing mechanical bite force with concrete, a self-adhesive layer (30) for bonding with a concrete structure, a separation protection layer (40) for protecting the self-adhesive layer (30), and a reinforcing layer (20) for improving the tear resistance of the waterstop body. The self-adhesive layer (30) is arranged on the front and back surfaces of the steel plate base material layer (10), the separation protection layer (40) covers the outer surface of the self-adhesive layer (30), and the reinforcing layer (20) is arranged between the steel plate base material layer (10) and the self-adhesive layer (30). The steel plate base material layer (10) is arranged at the innermost side of the waterstop body (100), and the steel plate base material layer (10) is preferably a perforated steel plate.

2. Railway tunnel steel sheet self-adhering waterstop band for circumferential joint according to claim 1, characterized in that, The holes (11) of the perforated steel plate are uniformly distributed along the extension direction of the annular joint, and the holes (11) of the perforated steel plate are distributed in a diamond array.

3. Railway tunnel steel sheet self-adhering waterstop for circumferential joints according to claim 2, characterized in that, The self-adhesive layer (30) adopts butyl rubber self-adhesive or modified asphalt self-adhesive.

4. The steel sheet self-adhering waterstop band for railway tunnel circular joint according to claim 1, characterized in that, The reinforcing layer (20) adopts a polyester fiber mesh cloth and is bonded with the steel plate base material layer (10) through a hot-pressing composite process.

5. The steel sheet self-adhering waterstop band for railway tunnel circular joint according to claim 1, characterized in that, The separation protection layer (40) is a peelable polyethylene film or polypropylene film, and the separation protection layer (40) is covered on the outer surface of the self-adhesive layer (30) through electrostatic adsorption or light gluing.

6. The steel plate self-adhering waterstop strip for railway tunnel circular joint according to claim 1, characterized in that, ​

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