Round tunnel glass fiber reinforced plastic two-lining quasi-integration rear fitting structure

Abstract

The invention relates to the technical field of tunnel structures, and discloses a circular tunnel glass fiber reinforced plastic secondary lining quasi-integral post-fitting structure which comprises a tunnel body, a glass fiber reinforced plastic pipe and a waterproof buffer layer, the tunnel body is integrally of a circular structure, and the glass fiber reinforced plastic pipe is arranged on the inner side of the tunnel body; a bonding layer is arranged on the inner side of the tunnel body, the glass reinforced plastic pipe is cut along the longitudinal cutting seam, and a waterproof buffer layer is arranged on one side of the glass reinforced plastic pipe. The glass reinforced plastic pipe is integrally curled and then fed into the tunnel body, and the side, provided with the waterproof buffer layer, of the glass reinforced plastic pipe is bonded with the bonding layer on the inner side of the tunnel body. The glass reinforced plastic pipes are arranged in the tunnel body in sections, the glass reinforced plastic pipes of the same section are attached to the tunnel body in an annular surrounding mode, and longitudinal joints are formed after the ends of the glass reinforced plastic pipes are connected. The different sections of glass reinforced plastic pipes are mutually lapped, and annular joints are formed at the joints; the internal and external loads are borne by the tunnel structure, and the lining is not borne by the loads and only bears the anti-corrosion isolation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel structures, and more particularly to a circular tunnel glass fiber reinforced plastic second lining quasi-integrated rear-bonded structure. Background Art

[0002] At present, drainage projects in municipal pipe networks, power plants and other projects use long-distance jacking pipes or shield tunnels. The initial inner wall of the tunnel is mostly a concrete structure with a large roughness coefficient and large water loss. It is in contact with seawater or corrosive liquids, which affects durability. At the same time, the inner wall is prone to the growth of attachments, especially the drainage pipes located in the sea area, which need to be regularly cleaned with dry inspection scrapers. To solve the above problems, different materials have been tried as tunnel linings, such as concrete, or polymer materials such as HDPE and PVC. However, each has its own disadvantages, such as poor drag reduction effect, slow construction, high cost, many joints in the later stage, and not resistant to operation and maintenance scrapers.

[0003] Glass fiber reinforced plastic material has the characteristics of strong corrosion resistance, smooth surface, low water loss coefficient, and unfavorable attachment of aquatic organisms. Even if a small amount of aquatic organisms are attached, the material is resistant to scraping and is convenient for maintenance and removal. It is more suitable as the lining material of the tunnel structure. In the past, the internal pipe structure was often used. This structural system has weaknesses in terms of structural load, that is, the tunnel and the inner pipeline need to consider the external pressure and internal pressure at the same time. When the internal water is emptied, the inner lining glass tube also needs to consider the influence of the external water pressure. The lining thickness is large, and there is waste in structure and cost. At the same time, it is necessary to perform wall grouting between the inner joints of the glass fiber reinforced plastic pipe during construction, which is slow to construct, expensive, and reduces the effective tunnel area. If the glass fiber reinforced plastic inner membrane is prefabricated with the tunnel structure pipe segment or pipe segment at the same time, it needs to be divided into small pieces or sections, and there are disadvantages such as discontinuous lining, many joints, poor integrity, and easy to fall off with the deformation of the tunnel structure.

[0004] Under the above two structural systems, various problems still exist, which limit the application of glass fiber steel lining. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a circular tunnel glass fiber reinforced plastic second lining quasi-integrated rear bonding structure, which has the advantage of more precise operation.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a circular tunnel FRP second lining quasi-integral post-bonding structure, comprising: a tunnel body, a FRP pipe, and a waterproof buffer layer, wherein the tunnel body is an overall circular structure, the tunnel body is arranged in accordance with the construction site, and the FRP pipe is arranged on the inner side of the tunnel body; an adhesive layer is arranged on the inner side of the tunnel body, the FRP pipe is cut along the longitudinal cutting seam, and a waterproof buffer layer is arranged on one side of the FRP pipe; the FRP pipe is curled as a whole and sent into the tunnel body, and the side of the FRP pipe provided with the waterproof buffer layer is bonded to the adhesive layer on the inner side of the tunnel body; the FRP pipe is arranged in sections in the tunnel body, and the FRP pipes of the same section are annularly surrounded by the tunnel body, and the ends are connected to form a longitudinal seam; FRP pipes of different sections are overlapped with each other, and an annular seam is formed at the connection.

[0007] As a preferred technical solution of the present invention, the tunnel body is constructed by any one of block prefabrication, whole ring prefabrication, and on-site casting, and when the tunnel body is prefabricated in blocks, segment block joints are provided between the pipe sections.

[0008] As a preferred technical solution of the present invention, the bonding layer is formed by a waterproof adhesive, and the waterproof adhesive is applied to the inner wall of the tunnel body by point-like or surface-like coating.

[0009] As a preferred technical solution of the present invention, the longitudinal seams and the annular seams are bonded with glass fiber reinforced plastic curing resin, and the longitudinal seams are bonded in an intermittent manner, leaving a non-bonded section.

[0010] As a preferred technical solution of the present invention, connecting rivets are arranged inside the glass fiber reinforced plastic pipe, the connecting rivets are nailed into the tunnel body, and multiple groups of connecting rivets are evenly arranged.

[0011] As a preferred technical solution of the present invention, the waterproof buffer layer is configured to adopt a bentonite blanket.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the internal and external loads of the present invention are all borne by the tunnel structure, the inner lining is not subjected to load, and only plays the role of anti-corrosion isolation, and the fiberglass lining structure can be thinned; after testing, it is recommended to use bentonite blanket or similar materials for the buffer layer; such materials can be self-compacted after absorbing tunnel seepage, and play the role of waterproof layer; at the same time, the material becomes plastic after absorbing water, and releases the influence of the stress and deformation of the outer tunnel structure on the inner lining; a small number of non-bonded sections can be reserved at the bonding points of the longitudinal joints of the inner lining to serve as water drainage and pressure relief joints for the buffer layer; the water pressure difference inside and outside the inner lining is released after the buffer layer is oversaturated under various working conditions, so as to avoid bulging and peeling of the inner lining. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the interior of the tunnel of the present invention;

[0015] Figure 3 This is a schematic diagram of cutting a glass fiber reinforced plastic pipe according to the present invention;

[0016] Figure 4 This is a schematic diagram of the curling of the glass fiber reinforced plastic tube of the present invention;

[0017] Figure 5 This is the installation section of the glass fiber reinforced plastic pipe of the present invention. Figure 1 ;

[0018] Figure 6 This is the installation section of the glass fiber reinforced plastic pipe of the present invention. Figure 2 ;

[0019] In the figure: 1. Tunnel body; 2. Segment joints; 3. Fiberglass pipe; 4. Waterproof buffer layer; 5. Connecting rivets; 6. Longitudinal joints; 7. Circular joints; 8. Adhesive layer; 9. Longitudinal cutting seams. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figures 1 to 6 As shown, the present invention provides a circular tunnel glass fiber reinforced plastic second lining quasi-integral post-bonding structure, comprising: a tunnel body 1, a glass fiber reinforced plastic pipe 3, and a waterproof buffer layer 4. The tunnel body 1 is a circular structure as a whole, and the tunnel body 1 is arranged in accordance with the construction site. The glass fiber reinforced plastic pipe 3 is arranged on the inner side of the tunnel body 1; an adhesive layer 8 is arranged on the inner side of the tunnel body 1, and the glass fiber reinforced plastic pipe 3 is cut along the longitudinal cutting seam 9, and a waterproof buffer layer 4 is arranged on one side of the glass fiber reinforced plastic pipe 3; the glass fiber reinforced plastic pipe 3 is curled as a whole and sent into the tunnel body 1, and one side of the glass fiber reinforced plastic pipe 3 provided with the waterproof buffer layer 4 is bonded to the adhesive layer 8 on the inner side of the tunnel body 1; the glass fiber reinforced plastic pipe 3 is arranged in sections in the tunnel body 1, and the glass fiber reinforced plastic pipe 3 of the same section is attached to the tunnel body 1 in a ring, and the ends are connected to form a longitudinal joint 6; glass fiber reinforced plastic pipes 3 of different sections are overlapped with each other, and an annular joint 7 is formed at the connection.

[0022] The FRP pipe 3 is cut along the longitudinal cutting seam 9, and after the waterproof buffer layer 4 is pre-bonded on the outside, it is curled into the tunnel body 1 and loosened at the intended application position. The FRP pipe 3 fits the tunnel body 1 by its own curvature, and the FRP pipe 3 is bonded with a curable resin adhesive; the overall internal and external loads are borne by the tunnel body 1, and the lining FRP pipe 3 is not subjected to load, and only bears the role of anti-corrosion isolation, and the FRP pipe 3 can be thinned; after absorbing water, it becomes plastic, releasing the influence of the stress and deformation of the outer tunnel structure on the inner lining.

[0023] The tunnel body 1 is constructed by any one of block prefabrication, whole ring prefabrication, and on-site casting, and when the tunnel body 1 is prefabricated in blocks, segment block joints 2 are provided between the pipe sections.

[0024] If the block prefabrication method is adopted, the segment block joints 2 are also bonded by curing resin to ensure integrity.

[0025] The adhesive layer 8 is formed of a waterproof adhesive, and the waterproof adhesive is applied to the inner wall of the tunnel body 1 in a dot-shaped or surface-shaped manner.

[0026] The bonding layer 8 is used to bond with the waterproof buffer layer 4 to connect the glass fiber reinforced plastic pipe 3 and the tunnel body 1 into a whole.

[0027] Among them, the longitudinal seam 6 and the annular seam 7 are bonded by glass fiber reinforced plastic curing resin, and the longitudinal seam 6 is bonded in an intermittent manner, leaving a non-bonded section.

[0028] A small number of unbonded sections are reserved at the bonding place of the longitudinal joint 6 as water discharge and pressure relief seams of the waterproof buffer layer 4. Under various working conditions, after the waterproof buffer layer 4 is oversaturated, the water pressure difference between the inner lining of the glass fiber reinforced plastic pipe 3 is released to avoid bulging and peeling of the inner lining.

[0029] Among them, connecting rivets 5 are arranged inside the glass fiber reinforced plastic pipe 3, and the connecting rivets 5 are nailed into the tunnel body 1, and multiple groups of connecting rivets 5 are evenly arranged.

[0030] The connection strength between the glass fiber reinforced plastic pipe 3 and the tunnel body 1 can be increased, and the stability of the connection can be improved.

[0031] The waterproof buffer layer 4 is configured to adopt bentonite blanket; the waterproof buffer layer 4 becomes plastic after absorbing water, thereby releasing the influence of the stress and deformation of the outer tunnel structure on the inner lining.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The circular tunnel glass fiber reinforced plastic second lining quasi-integral rear bonding structure is characterized by: The invention comprises: a tunnel body (1), a glass fiber reinforced plastic pipe (3), and a waterproof buffer layer (4); the tunnel body (1) is in a circular structure as a whole, the tunnel body (1) is arranged in accordance with the construction site, the glass fiber reinforced plastic pipe (3) is arranged on the inner side of the tunnel body (1); an adhesive layer (8) is arranged on the inner side of the tunnel body (1), the glass fiber reinforced plastic pipe (3) is cut along a longitudinal cutting seam (9), and a waterproof buffer layer (4) is arranged on one side of the glass fiber reinforced plastic pipe (3); The glass fiber reinforced plastic pipe (3) is rolled as a whole and then fed into the tunnel body (1). The side of the glass fiber reinforced plastic pipe (3) provided with the waterproof buffer layer (4) is bonded to the bonding layer (8) on the inner side of the tunnel body (1). The glass fiber reinforced plastic pipe (3) is arranged in sections in the tunnel body (1). The glass fiber reinforced plastic pipe (3) of the same section is attached to the tunnel body (1) in a circular manner, and the ends are connected to form a longitudinal joint (6). The glass fiber reinforced plastic pipes (3) of different sections are overlapped with each other, and a circular joint (7) is formed at the connection.

2. The circular tunnel glass fiber reinforced plastic second lining quasi-integrated post-bonding structure according to claim 1 is characterized by: The tunnel body (1) is constructed by any one of block prefabrication, whole ring prefabrication, and on-site casting, and when the tunnel body (1) is prefabricated in blocks, pipe segment block joints (2) are provided between the pipe sections.

3. The circular tunnel glass fiber reinforced plastic second lining quasi-integrated post-bonding structure according to claim 1 is characterized by: The adhesive layer (8) is formed by a waterproof adhesive, and the waterproof adhesive is applied to the inner wall of the tunnel body (1) by means of dot-like or surface-like application.

4. The circular tunnel glass fiber reinforced plastic second lining quasi-integrated post-bonding structure according to claim 1 is characterized by: The longitudinal seam (6) and the annular seam (7) are bonded with glass fiber reinforced plastic curing resin, and the longitudinal seam (6) is bonded in an intermittent manner, leaving a non-bonded section.

5. The circular tunnel glass fiber reinforced plastic second lining quasi-integrated post-bonding structure according to claim 1 is characterized by: The glass fiber reinforced plastic pipe (3) is provided with a connecting rivet (5) on the inner side, the connecting rivet (5) is driven into the tunnel body (1), and a plurality of groups of the connecting rivets (5) are evenly arranged.

6. The circular tunnel glass fiber reinforced plastic second lining quasi-integrated post-bonding structure according to claim 1 is characterized by: The waterproof buffer layer (4) is configured to adopt a bentonite blanket.

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