A glass fiber reinforced continuously wound spiral reinforcement pipe for tunnel lining

Abstract

This utility model discloses a glass fiber reinforced continuously wound spiral rib pipe for tunnel lining. The pipe and the spiral rib layer continuously wound on the pipe are provided with an interface layer on the surface of the pipe and the spiral rib layer. The pipe includes an inner lining layer and a structural layer. A grid layer is laid on the surface of the structural layer. All layers are connected as one. The pipe of this utility model includes an inner lining layer and a structural layer. By adding continuously wound spiral ribs, a grid layer and an interface layer to the outer surface of the pipe, a spiral rib pipe can be used in tunnels. It has a reasonable manufacturing cost and strong load-bearing capacity.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipelines for tunnel lining, specifically relating to a glass fiber reinforced continuously wound spiral reinforcement pipeline for tunnel lining. Background Technology

[0002] For underground or subsea tunnel pipeline projects, the shield tunneling method with segment lining is currently the most common lining structure in urban underground pipeline construction. However, its application in some fields is limited by factors such as high investment costs, low construction efficiency, long construction period, and poor corrosion resistance. Therefore, it is imperative to develop a tunnel lining pipeline with better corrosion resistance, high construction efficiency, and low cost.

[0003] Glass fiber reinforced pipes have been widely used in underground and submarine pipeline projects due to their advantages such as lightweight, high strength, good corrosion resistance, and convenient construction. Currently, the most commonly used type is the glass fiber reinforced rib pipe, which adopts a single circumferential rib type. Under external pressure, the stress is uneven and the circumferential rib is prone to delamination with the pipe body, resulting in limited stiffness improvement and thus causing pipeline instability and failure.

[0004] Therefore, a new type of lining pipe needs to be designed that can not only integrate well with the concrete structure of the underground tunnel, but also have good load-bearing capacity. A glass fiber reinforced continuous spiral rib pipe for tunnel lining has emerged. Summary of the Invention

[0005] The purpose of this invention is to design a glass fiber reinforced continuously wound spiral reinforcement pipe for tunnel lining. The pipe of this invention has a reasonable manufacturing cost and strong load-bearing capacity when used in tunnels.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A glass fiber reinforced continuously wound spiral duct for tunnel lining includes a duct and a spiral rib layer continuously wound on the duct. An interface layer is provided on the surface of the duct and the spiral rib layer. The duct includes an inner lining layer and a structural layer. A grid layer is laid on the surface of the structural layer. All layers are connected as one unit.

[0008] Furthermore, the spiral reinforcement layer is formed by continuously winding yarn bundles and binding tapes.

[0009] Furthermore, the interface layer includes resin and anti-slip particles. The resin is laid on the surface of the pipe and the spiral reinforcement layer, and the anti-slip particles are sprinkled on the resin. The above structure forms an interface layer, which increases the bonding performance between fiberglass and concrete.

[0010] Furthermore, the mesh layer structure is formed by yarn bundles that are interwoven in a circumferential and longitudinal direction.

[0011] Furthermore, the inner lining comprises fiberglass mat and resin.

[0012] Furthermore, the yarn bundle consists of at least 20 continuous fiber yarns, each yarn being impregnated with resin, forming a yarn bundle with a cross-section of one of the following shapes: near-circular, elliptical, or rectangular, and the binding strap is at least one polyester filament or fiber yarn.

[0013] Furthermore, the spiral reinforcement layer is wound evenly and equidistantly around the outer surface of the pipe according to a set pattern. The pitch of the spiral reinforcement is designed according to the rigidity requirements of the pipe. The winding angle of the spiral reinforcement is 40-90 degrees, and the winding tension of the yarn bundle is controlled. It is cured and formed at room temperature to provide the pipe body with corresponding resistance to deformation and overall structural performance.

[0014] The above technical solution can achieve the following beneficial effects:

[0015] This utility model of pipe includes an inner lining layer and a structural layer. Continuously wound spiral ribs, a mesh layer, and an interface layer are added to the outer surface of the pipe to obtain a spiral rib pipe that can be applied to tunnels. It has a reasonable manufacturing cost and strong load-bearing capacity.

[0016] The continuous spiral reinforcement is integrally formed with the pipe, which improves the overall rigidity of the pipe and provides better reliability and stability, making it safe for use in underground engineering.

[0017] Anti-slip particles are evenly distributed on the continuously wound spiral reinforcement to improve the bond between the reinforcement and the concrete. The winding angle of the spiral reinforcement is 40-90 degrees to control the winding tension of the yarn bundle. It is cured at room temperature to provide the pipeline with corresponding resistance to deformation and overall structural performance. Attached Figure Description

[0018] Figure 1 This is a partial structural diagram of a spiral-ribbed pipe.

[0019] Figure 2 This is a schematic diagram of the existing spiral bar winding production process.

[0020] Figure 3 This is a 3D diagram of a spiral-reinforced pipe.

[0021] In the picture:

[0022] In the diagram: 1. Inner lining layer; 2. Structural layer; 3. Spiral reinforcement layer; 4. Interface layer; 5. Mesh layer. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] like Figure 1 and 3As shown in the embodiment: a glass fiber reinforced continuously wound spiral reinforcement pipe for tunnel lining, comprising a pipe and a spiral reinforcement layer 3 continuously wound on the pipe body, which, from the outside to the inside, are an interface layer 4 that is bonded to the concrete, a continuously wound spiral reinforcement layer 3, a mesh-wound structural layer 2, and a resin-rich inner lining layer 1, all of which are connected as one unit.

[0025] The continuously wound spiral reinforcement layer is composed of multiple strands of continuously wound yarn. The spiral reinforcement includes yarn bundles and spiral binding tapes. The continuously wound spiral reinforcement is composed of no less than 20 strands of continuous fiber yarn. Each strand of yarn is impregnated with resin to form a yarn bundle with a cross-section of nearly circular, elliptical, rectangular or other shapes. The spiral binding tape is no less than one polyester filament or fiber yarn. An interface layer is attached to the spiral reinforcement to improve the bonding between the reinforcement and the concrete.

[0026] The external concrete bonding interface layer contains a special resin for bonding fiberglass and concrete, as well as anti-slip particles to enhance the bonding performance between fiberglass and concrete.

[0027] The mesh-wound structure layer includes circumferential and longitudinally interwoven yarn bundles, and the resin-rich inner lining layer contains glass fiber mat with high resin content and resin with good seawater corrosion resistance.

[0028] The spiral ribs on the surface of the pipe are evenly wound around the outside of the pipe at equal intervals according to a set pattern. The pitch of the spiral ribs is designed according to the rigidity requirements of the pipe. The winding angle of the spiral ribs is 40-90 degrees. The winding tension of the yarn bundle is controlled. The pipe is cured at room temperature to provide the pipe body with corresponding resistance to deformation and overall structural performance.

[0029] Continuously wound spiral reinforcement can be integrally formed with the pipeline, which improves the overall rigidity of the pipeline, provides better reliability and stability, and can be safely applied to underground engineering.

[0030] The specific production process is as follows:

[0031] Figure 2 As shown, the basic structure of a continuously wound spiral pipe consists of four layers, as follows: Figure 1 As shown, the layers are a continuously wound spiral reinforcement layer, an external concrete bonding interface layer, a mesh wound structure layer, and a resin-rich inner lining layer.

[0032] Continuous spiral winding utilizes existing pipe winding production lines. These lines include equipment for yarn bundle assembly, reinforcement forming, binding tape winding, and spraying anti-slip particles. This allows for the assembly of multiple yarn bundles and their uniform, continuous winding onto the pipe body according to the designed yarn bundle shape. Figure 2 (as shown)

[0033] When the spiral reinforcement yarn bundles are assembled, a certain tension is applied and the resin content is controlled to ensure the strength and rigidity of the spiral reinforcement.

[0034] Spiral rib forming molds are customized according to the shape and size of the ribs, with smooth inner surfaces, resistance to resin corrosion, and a certain strength;

[0035] After the spiral rib bundle passes through the forming mold, polyester filaments or fiber yarns with a certain prestress are bound to the outside. The binding line is wound according to the set winding speed that matches the rib bundle.

[0036] When the spiral yarn bundle is wound onto the tube, a certain amount of anti-slip particles are sprayed. The particle size needs to be graded and configured.

[0037] To enhance the bonding performance between the entire pipe body and the concrete layer, a mesh fabric is used for the outermost layer of the pipe body, which increases the roughness of the outer surface of the pipe body. The outermost layer uses an interface resin for fiberglass and concrete, and anti-slip particles are sprinkled on it in a certain proportion to form an external concrete bonding interface layer.

[0038] The above descriptions are all preferred embodiments of this utility model. For those skilled in the art, any modifications to this utility model in various equivalent forms without departing from the principle of this utility model shall fall within the protection scope of the appended claims.

Claims

1. A glass fibre reinforced continuous filament spiral wound spiral rib pipe for tunnel linings characterised in that: It includes a pipe and a spiral reinforcement layer (3) continuously wound on the pipe, and an interface layer (4) is provided on the surface of the pipe and the spiral reinforcement layer. The pipe includes an inner lining layer (1) and a structural layer (2), and a mesh layer (5) is laid on the surface of the structural layer.

2. The glass fiber reinforced continuously wound spiral reinforcement pipe for tunnel lining according to claim 1, characterized in that: The spiral reinforcement layer is formed by continuously winding yarn bundles and binding straps.

3. The glass fiber reinforced continuously wound spiral reinforcement pipe for tunnel lining according to claim 1, characterized in that: The interface layer consists of resin and anti-slip particles. The resin is laid on the surface of the pipe and spiral reinforcement layer, and the anti-slip particles are sprinkled on the resin.

4. The glass fiber reinforced continuously wound spiral reinforcement pipe for tunnel lining according to claim 1, characterized in that: The mesh layer (5) structure is formed by yarn bundles that are intertwined in the circumferential and longitudinal directions.

5. The glass fiber reinforced continuously wound spiral reinforcement pipe for tunnel lining according to claim 2, characterized in that: The yarn bundle consists of at least 20 continuous fiber yarns, each yarn is impregnated with resin, and the yarn bundle has a cross-section of one of the following shapes: near-circular, elliptical, or rectangular. The binding strap is at least one polyester filament or fiber yarn.

6. The glass fiber reinforced continuously wound spiral reinforcement pipe for tunnel lining according to claim 5, characterized in that: The spiral reinforcement layer has a winding angle of 40-90 degrees.

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