Fiber reinforce plastic (FRP) concrete composite pipe piece for tunnel lining

Abstract

The utility model discloses an FRP concrete composite pipe piece for tunnel lining, which comprises a concrete pipe piece, an FRP lining layer is arranged on the inner surface of the concrete pipe piece, and the FRP lining layer is fixedly connected with the concrete pipe piece. The FRP lining layer is compounded on the inner surface of the concrete duct piece, and the excellent corrosion resistance of the FRP material is utilized, so that the service life of the duct piece in a corrosive environment is effectively prolonged, and meanwhile, the maintenance cost is reduced. The surface of the FRP lining layer is smooth, so that the flow resistance of fluid in the tunnel is obviously reduced, and the ventilation and drainage efficiency of the tunnel is improved; meanwhile, the FRP material is low in density, the weight of the duct piece is reduced, transportation and installation are convenient, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of composite material applications, and in particular to an FRP concrete composite segment for tunnel lining. Background Technology

[0002] In tunnel engineering, tunnel segments are a crucial component of tunnel lining, primarily used to support the tunnel structure and prevent ground deformation and groundwater leakage. Traditional tunnel segments are typically made of reinforced concrete, which, while possessing a certain level of strength and durability, still presents the following problems in practical applications: 1. Insufficient corrosion resistance: In highly corrosive environments (such as seawater and acidic soils), traditional tunnel segments are easily corroded, leading to a decline in structural performance. 2. High flow resistance: The rough inner surface of traditional tunnel segments increases the flow resistance of fluids within the tunnel, affecting tunnel ventilation and drainage efficiency. 3. High weight: The heavy weight of traditional reinforced concrete tunnel segments increases the difficulty of transportation and installation. Utility Model Content

[0003] To address the aforementioned problems, this invention provides an FRP concrete composite segment for tunnel lining.

[0004] This utility model provides an FRP concrete composite segment for tunnel lining, which adopts the following technical solution:

[0005] An FRP concrete composite segment for tunnel lining includes a concrete segment, an FRP inner lining layer provided on the inner surface of the concrete segment, and the FRP inner lining layer being fixedly connected to the concrete segment.

[0006] The above technical solution, by setting an FRP inner lining on the inner surface of the concrete tunnel segment and fixing it to the concrete tunnel segment, significantly improves the corrosion resistance of the segment, extends its service life, reduces the flow resistance of fluid in the tunnel, reduces the overall weight of the segment, and facilitates transportation and installation.

[0007] As a preferred embodiment of this invention, a connecting rib is provided on the side of the FRP inner lining near the concrete pipe segment, and the connecting rib extends into the concrete pipe segment and connects with the concrete pipe segment.

[0008] By using the above technical solution, a connecting rib is set on the side of the FRP liner close to the concrete pipe segment, and the connecting rib extends into the concrete pipe segment, which enhances the connection strength between the FRP liner and the concrete pipe segment, prevents the FRP liner from falling off, and improves the overall stability of the structure.

[0009] As a preferred embodiment of this invention, the connecting rib is provided with a protruding rib extending in the width direction of the concrete pipe segment.

[0010] The above technical solution, by setting a convex rib extending in the width direction of the concrete segment on the connecting rib, further enhances the bonding force between the connecting rib and the concrete segment, ensuring a firm connection between the FRP inner lining and the concrete segment, and simplifying the installation process.

[0011] As a preferred embodiment of this invention, at least two connecting ribs are provided, and the at least two connecting ribs are distributed along the width direction of the FRP inner liner.

[0012] By using the above technical solution, at least two connecting ribs are set and distributed along the width direction of the FRP inner lining, the stress between the FRP inner lining and the concrete pipe segment is evenly distributed, thereby improving the overall strength and durability of the structure.

[0013] As a preferred embodiment of this invention, a steel mesh is provided in the concrete segment layer, and the connecting rib extends into the concrete segment layer and connects with the steel mesh.

[0014] By implementing the above technical solution, and by setting a steel mesh in the concrete segment layer and extending the connecting ribs into the concrete segment layer to connect with the steel mesh, the connection strength between the FRP lining and the concrete segment is further enhanced, ensuring the overall stability and deformation resistance of the structure.

[0015] As a preferred embodiment of this utility model, a connecting hole is provided on the connecting rib, and the connecting rib is tied to the steel mesh through the connecting hole.

[0016] The above technical solution simplifies the connection process between the FRP lining and the concrete segments by setting connection holes on the connecting ribs and binding them with the steel mesh through the connection holes, thereby improving installation efficiency and ensuring the firmness and reliability of the connection.

[0017] In summary, this utility model has at least one of the following beneficial technical effects:

[0018] 1. This utility model utilizes the excellent corrosion resistance of FRP material by composite FRP lining on the inner surface of concrete pipe segments, which effectively extends the service life of the pipe segments in corrosive environments and reduces maintenance costs.

[0019] 2. The smooth surface of the FRP inner lining significantly reduces the flow resistance of fluids in the tunnel, improving tunnel ventilation and drainage efficiency; at the same time, the low density of FRP material reduces the weight of the tunnel segments, making them easier to transport and install, and improving construction efficiency.

[0020] 3. By setting connecting ribs and binding them with the steel mesh, a firm bond between the FRP lining and the concrete segments is ensured, improving the overall strength and deformation resistance of the structure and simplifying the installation process. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view along the length of the FRP concrete composite segment used for tunnel lining according to Embodiment 1 of this utility model.

[0022] Figure 2 This is a cross-sectional view of the width direction of the FRP concrete composite segment used for tunnel lining according to Embodiment 1 of this utility model.

[0023] Figure 3 This is a cross-sectional view along the length of the FRP concrete composite segment used for tunnel lining according to Embodiment 2 of this utility model.

[0024] Figure 4 This is a cross-sectional view of the width direction of the FRP concrete composite segment used for tunnel lining according to Embodiment 2 of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1. FRP inner lining; 2. Connecting rib; 3. Concrete segment; 4. Reinforcing mesh; 5. Connecting hole; 6. Protruding rib. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below.

[0027] Example 1:

[0028] Reference Figures 1 to 2 This embodiment discloses an FRP (fiberglass reinforced plastic) concrete composite segment for tunnel lining, comprising a concrete segment 3, with a reinforcing mesh 4 disposed inside the concrete segment 3. An FRP inner lining layer 1 is disposed on the inner surface of the concrete segment. In this embodiment, the FRP inner lining layer is made of fiberglass, specifically, it can be a fiberglass sheet prepared by fiberglass pultrusion molding. A connecting rib 2 is disposed on the side of the FRP inner lining layer 1 near the concrete segment 3. The connecting rib 2 is also prepared by extrusion molding and integrally formed with the FRP inner lining layer 1. The connecting rib 2 extends into the concrete segment 3 and is disposed along the length direction of the FRP inner lining layer 1, that is, along the circumference of the segment. The number of connecting ribs 2 is determined according to the width of the FRP inner lining layer 1. Figure 2 Only one connecting rib 2 is shown in the drawing.

[0029] Connecting holes 5 are provided on the connecting rib 2, and multiple connecting holes 5 are arranged along the length direction (circumferential direction) of the connecting rib 2. The connecting rib 2 is tied to the steel mesh 4 through the connecting holes 5, which can fix the connecting rib 2 to the steel mesh 4. This ensures a secure connection between the FRP inner lining layer 1 and the concrete segment 3, preventing the FRP inner lining layer 1 from falling off the concrete segment 3. By setting the FRP inner lining layer 1, it is possible to effectively resist the corrosive environment and extend the service life of the segment. At the same time, the smooth surface of the FRP inner lining layer 1 can significantly reduce the flow resistance of fluid in the tunnel, and the low material density of the FRP inner lining layer 1 can effectively reduce the overall weight of the segment, facilitating transportation and installation.

[0030] Example 2

[0031] Reference Figure 3 and Figure 4 This embodiment discloses an FRP concrete composite segment for tunnel lining. The rest of the structure of the segment is the same as that in embodiment 1. The difference is that in this embodiment, three connecting ribs 2 are provided on the FRP inner lining 1. The three connecting ribs 2 are distributed along the width direction of the FRP inner lining 1. Each connecting rib 2 is provided with a protruding rib 6 extending into the width direction of the concrete segment 3. These protruding ribs 6 are also integrally formed with the connecting ribs. Through the protruding ribs 6 on the connecting ribs 2, the concrete layer of the concrete segment 3 can be tightly bonded, ensuring that the FRP inner lining 1 and the concrete segment 3 are firmly connected. At the same time, the protruding ribs 6 on the connecting ribs 2 can eliminate the step of binding the connecting ribs 2 with the steel mesh 4.

[0032] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An FRP concrete composite segment for tunnel lining, comprising concrete segments, characterized in that: An FRP liner is provided on the inner surface of the concrete pipe segment, and the FRP liner is fixedly connected to the concrete pipe segment; a connecting rib is provided on the side of the FRP liner near the concrete pipe segment, and the connecting rib extends into the concrete pipe segment and is connected to the concrete pipe segment.

2. The FRP concrete composite segment for tunnel lining according to claim 1, characterized in that: The connecting rib is provided with a protruding rib extending in the width direction of the concrete pipe segment.

3. The FRP concrete composite segment for tunnel lining according to claim 1, characterized in that: The connecting ribs are provided in at least two manner, and the at least two connecting ribs are distributed along the width direction of the FRP inner liner.

4. The FRP concrete composite segment for tunnel lining according to claim 1, characterized in that: A steel mesh is provided in the concrete segment layer, and the connecting rib extends into the concrete segment layer and connects with the steel mesh.

5. The FRP concrete composite segment for tunnel lining according to claim 4, characterized in that: A connecting hole is provided on the connecting rib, and the connecting rib is tied to the steel mesh through the connecting hole.

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