A self-adapting deformation pre-assembly rapid construction method for waterproof and heat preservation board of cold region tunnel

Abstract

The application discloses a kind of cold region tunnel waterproof heat preservation board self-adapting deformation pre-assembly rapid construction method, comprising the following steps: inspecting initial support flatness and cleanliness;Waterproof coating is sprayed to the surface of heat preservation board, and self-adhesive strip and hot melt pad are arranged on the front and back of heat preservation board;Head and tail of heat preservation board are sequentially connected and assembled into a whole by deformable connecting groove, and first waterproof plate is bonded and applied on the back of pre-assembled heat preservation board;A layer of waterproof plate connecting band is applied on the free side of initial support, and second waterproof plate is welded on the waterproof plate connecting band;The front of heat preservation board is integrally bonded to the second waterproof plate on the side of initial support, and deformable connecting groove is adjusted according to the shape of tunnel section, so that heat preservation board and connected second waterproof plate are closely attached;After completion of each process, the installation of heat preservation board and second waterproof plate is inspected and accepted in combination with design requirements.The application can realize pre-assembly rapid construction of heat preservation board in the construction process of cold region tunnel.

Description

Technical Field

[0001] This invention relates to the field of tunnel engineering construction technology, specifically to a rapid construction method for the adaptive deformation pre-assembly of waterproof and thermal insulation boards for tunnels in cold regions. Background Technology

[0002] As tunnel construction in my country gradually extends to cold regions with harsh climates, such as high latitudes and high altitudes, the number of tunnels in frigid areas will increase. Extensive experience in the construction and operation of numerous cold-region tunnels shows that defects caused by low temperatures are prevalent in existing highway and railway tunnels. Currently, the main defects faced by tunnels in high-altitude and cold regions include tunnel lining leakage, concrete spalling, cracking, and subsidence. These frost damage problems not only severely damage the structure itself but also significantly increase operation and maintenance costs, which is extremely detrimental to both safety and economy. Traditionally, insulation and waterproofing boards are installed using welding, but in high-altitude and cold regions, due to the influence of cold air, this method suffers from low construction efficiency, insecure installation, and welding strength failing to meet design requirements. To improve the construction efficiency of insulation boards for cold-region tunnels, enhance the frost protection effect of cold-region tunnels, and effectively solve the problem of tunnel frost damage, this invention proposes a rapid construction method for adaptive deformation pre-assembly of waterproof and insulation boards for cold-region tunnels. Summary of the Invention

[0003] The purpose of this invention is to propose a rapid construction method for the self-adaptive deformation pre-assembly of waterproof and thermal insulation boards for tunnels in cold regions. This method can effectively improve the construction efficiency of thermal insulation boards for tunnels in cold regions, improve the tightness of the fit between the thermal insulation boards and the initial support of the tunnel, enhance the anti-freezing effect of tunnels in cold regions, and solve the problem of tunnel frost damage.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0005] A rapid construction method for self-adaptive deformation pre-assembly of waterproof and thermal insulation boards for tunnels in cold regions includes the following steps:

[0006] S1. Inspect the flatness and cleanliness of the initial support structure;

[0007] S2. Apply waterproof coating to the surface of the insulation board and install self-adhesive strips and hot melt pads on the front and back of the insulation board.

[0008] S3. The insulation board is connected and assembled into a whole by means of deformable connecting groove, and a first waterproof board is applied to the back of the pre-assembled insulation board by means of self-adhesive strip and hot melt pad.

[0009] S4. Apply a waterproof membrane connecting strip on the free side of the initial support, and weld a second waterproof membrane on the waterproof membrane connecting strip.

[0010] S5. Use self-adhesive strips and hot melt pads to bond the front of the insulation board to the second waterproof board on the initial support side. Adjust the deformable connecting groove according to the shape of the tunnel cross section to make the insulation board and the connected second waterproof board fit tightly.

[0011] S6. After each process is completed, inspect and accept the installation of the insulation board and the second waterproof board in accordance with the design requirements.

[0012] Further, in step S1, the initial support flatness should satisfy D / L≤1 / 20, where D is the depth of the indentation between two adjacent convex surfaces of the initial support base, and L is the distance between two adjacent convex surfaces of the initial support base.

[0013] Furthermore, in step S2, three self-adhesive strips are respectively provided on the front and back of the insulation board, and two hot melt pads are provided on each self-adhesive strip.

[0014] Furthermore, in step S2, the hot melt pad is bonded and fixed to the self-adhesive strip.

[0015] Further, in step S3, the deformable connecting groove is provided at one end of each insulation board, and bolt holes are reserved at both ends of the insulation board and the deformable connecting groove. The insulation board and the deformable connecting groove are locked and fixed by bolts. The deformable connecting groove includes a deformable steel frame, a cable clamp, a deformation groove, and an insulation layer. There are two sets of deformable steel frames. The cable clamp is connected in the middle of each set of deformable steel frames. A deformation groove is provided between the two sets of deformable steel frames in a direction perpendicular to the deformable steel frames. The insulation layer is connected to both sides of the deformation groove. An aluminum alloy plate and a compression spring are arranged at intervals in the deformation groove. The aluminum alloy plate and the compression spring are arranged in a direction perpendicular to the insulation layer.

[0016] Furthermore, the deformable steel frame is fixed to the cable with bolts; the two ends of the aluminum alloy plate of the deformation groove are respectively connected to the insulation layer through the second compression spring, the two ends of the compression spring are respectively connected to the insulation layer, and the insulation layer and the deformable steel frame are connected with self-adhesive strips.

[0017] Furthermore, the cable clamp is a Q345 low-carbon steel double-groove clamp cable clamp; the deformable steel frame is a U29 type steel frame; and the insulation layer is made of polyurethane rigid plastic board with a thickness of 3-5cm.

[0018] Furthermore, in step S5, the flatness of the insulation board should meet the requirement that D / L≤1 / 30, where D is the depth of the indentation between two adjacent convex surfaces of the initial support base, and L is the distance between two adjacent convex surfaces of the initial support base.

[0019] Furthermore, in step S5, after the overall installation of the insulation board is completed, the tightness of the insulation board is checked. If it does not meet the requirements, it is reinforced by adjusting the deformable connecting groove until the design requirements are met.

[0020] Furthermore, the insulation board is made of rigid polyurethane board with a thickness of 5cm-8cm; the first waterproof board and the second waterproof board are made of EVA material board with a thickness of 1.5mm-5mm.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] This invention improves the structure of the insulation board by incorporating deformable connecting grooves at the ends of the board, enabling pre-assembled insulation panels for overall installation. This enhances the adaptability of the insulation board layout to the tunnel cross-section shape, allowing for direct on-site installation with fewer steps. Furthermore, self-adhesive tape and hot-melt gaskets replace traditional welds for connecting the insulation and waterproofing panels, facilitating rapid pre-assembly of insulation panels during tunnel construction in cold regions. This construction method simplifies the installation process, offers high adjustability, overcomes the slow installation progress and insecure installation issues common in cold-region tunnels, effectively improves the efficiency of insulation board installation in cold regions, and enhances the anti-freezing effect of tunnels in cold areas. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a flowchart of the construction process of the present invention;

[0025] Figure 2 This is a schematic diagram of the installation of the insulation board of the present invention;

[0026] Figure 3 This is an enlarged schematic diagram of the deformable connecting groove of the present invention;

[0027] Figure 4 This is a schematic diagram of the insulation board structure of the present invention;

[0028] Figure 5 This is a schematic diagram showing the installation of the self-adhesive strip and hot melt gasket on the surface of the insulation board of the present invention;

[0029] Reference numerals: 1-Initial support, 2-Deformable connection groove, 21-Deformable steel frame, 22-Cable clamp, 23-Deformation groove, 24-Aluminum alloy plate, 25-Compression spring, 26-Insulation layer, 27-Second compression spring, 3-Insulation board, 4-Self-adhesive strip, 5-Hot melt gasket. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] A rapid construction method for self-adaptive deformation pre-assembly of waterproof and thermal insulation boards for tunnels in cold regions, the specific steps of which are as follows:

[0032] S1. Inspect the flatness and cleanliness of the initial support 1; it should meet the requirement that D / L≤1 / 20, where D is the depth of the indentation between two adjacent convex surfaces of the initial support 1 base surface, and L is the distance between two adjacent convex surfaces of the initial support 1 base layer. The insulation board laying work can only be carried out after the design requirements are met.

[0033] S2. Waterproof coating is sprayed onto the surface of the insulation board 3, and self-adhesive strips 4 and hot-melt gaskets 5 are installed on the front and back of the insulation board 3 for connection with the waterproof board. In this embodiment, three self-adhesive strips 4 are installed on the front and back of the insulation board 3, and two hot-melt gaskets 5 are installed on each self-adhesive strip 4. The hot-melt gaskets 5 are bonded to the self-adhesive strips 4 to prevent them from falling off during hot melting. Preferably, the insulation board 3 is made of rigid polyurethane board with a thickness of 5cm to 8cm.

[0034] S3. The insulation boards 3 are sequentially connected end to end to form a whole through the deformable connecting groove 2. A first waterproof layer is then applied to the back of the pre-assembled insulation boards 3 using the self-adhesive strip 4 and hot-melt gasket 5. The deformable connecting groove 2 is provided at one end of each insulation board 3. Bolt holes are pre-drilled at both ends of the insulation board 3 and the deformable connecting groove 2. The insulation board 3 and the deformable connecting groove 2 are locked and fixed with bolts, completing the pre-assembly of each insulation board 3. Preferably, the first waterproof layer is made of EVA material with a thickness of 1.5mm-5mm. Preferably, the bolts are high-strength bolts, preferably made of 40 boron steel.

[0035] The deformable connecting groove 2 includes a deformable steel frame 21, a cable clamp 22, a deformation groove 23, and an insulation layer 26. There are two sets of deformable steel frames 21, with the cable clamp 22 connected to the middle of each set of deformable steel frames 21. A deformation groove 23 is provided between the two sets of deformable steel frames 21 in a direction perpendicular to the deformable steel frames 21. The insulation layer 26 is connected to both sides of the deformation groove 23. An aluminum alloy plate 24 and a compression spring 25 are provided at intervals in the deformation groove 23, and the aluminum alloy plate 24 and the compression spring 25 are provided in a direction perpendicular to the insulation layer 26. The deformable steel frame 21 and the cable clamp 22 are fixed together with bolts. The two ends of the aluminum alloy plate 24 of the deformation groove 23 are connected to the insulation layer 26 via second compression springs 27, and the two ends of the compression springs 25 are connected to the insulation layer 26. Specifically, the insulation layer 26 has spring receiving holes, and the compression springs 25 and 27 abut against these holes. The other end of the second compression spring 27 is fixedly connected to the aluminum alloy plate 24. The insulation layer 26 and the deformable steel frame 21 are connected with self-adhesive strips. Preferably, the cable clamp 22 is a Q345 low-carbon steel double-groove clamp-type cable clamp; the deformable steel frame 21 is a U29 type steel frame; and the insulation layer 26 is made of rigid polyurethane plastic sheet with a thickness of 3-5 cm.

[0036] S4. Apply a waterproof membrane connecting strip to the free side of the initial support 1. The size of the waterproof membrane connecting strip matches the size of the self-adhesive strip on the insulation board. After confirming that there are no dust or other contaminants on the waterproof membrane connecting strip and the second waterproof board, weld the second waterproof board onto the waterproof membrane connecting strip. Preferably, the second waterproof board is made of EVA material with a thickness of 1.5mm-5mm.

[0037] S5. Using self-adhesive strips 4 and hot-melt pads 5, the front of the insulation board 3 is bonded to the second waterproofing board on the free side of the initial support 1. After the insulation board 3 is installed, the bolts between the deformable steel frame 21 and the cable clamp 22 are loosened. The deformation groove 23 at the end of each insulation board 3 and the deformable steel frame 21 are adjusted. The deformable steel frame 21 moves relative to the cable clamp 22, causing the compression spring 25 in the deformation groove 23 to deform, coordinating the connecting groove to complete the overall deformation of the tunnel cross section. After deformation, the cable clamp bolts are tightened to fix the deformable connecting groove, achieving a tight bond between the pre-assembled insulation board and the second waterproofing board, while ensuring the overall rigidity and connection strength of the insulation board. After the overall installation of the insulation board is completed, the tightness of the insulation board is checked. The flatness of the insulation board laying meets the requirement of D / L≤1 / 30. If the requirement is not met, the deformable connecting groove is adjusted to reinforce it until the design requirements are met.

[0038] S6. After each process is completed, inspect and accept the installation of the insulation board and the second waterproof board in accordance with the design requirements.

[0039] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A rapid construction method for self-adaptive deformation pre-assembly of waterproof and thermal insulation boards for tunnels in cold regions, characterized in that, Includes the following steps: S1. Inspect the flatness and cleanliness of the initial support structure; S2. Apply waterproof coating to the surface of the insulation board and install self-adhesive strips and hot melt pads on the front and back of the insulation board. S3. The insulation boards are sequentially connected end-to-end to form a whole using deformable connecting grooves, and a first waterproof layer is applied to the back of the pre-assembled insulation boards using self-adhesive strips and hot-melt gaskets; the deformable connecting groove is provided at one end of each insulation board, and bolt holes are pre-drilled at both ends of the insulation board and the deformable connecting groove, and the insulation board and the deformable connecting groove are locked and fixed with bolts; the deformable connecting groove includes a deformable steel frame, a cable clamp, a deformation groove, and an insulation layer; there are two sets of deformable steel frames, and each set of deformable steel frames contains... The cable is connected to the main body. A deformation groove is provided between the two sets of deformable steel frames in a direction perpendicular to the deformable steel frames. Insulation layers are connected to both sides of the deformation groove. Aluminum alloy plates and compression springs are arranged at intervals in the deformation groove, and the aluminum alloy plates and compression springs are arranged in a direction perpendicular to the insulation layers. The deformable steel frames are fixed to the cable with bolts. The two ends of the aluminum alloy plates in the deformation groove are connected to the insulation layers through second compression springs. The two ends of the compression springs are connected to the insulation layers. The insulation layers are connected to the deformable steel frames with self-adhesive strips. S4. Apply a waterproof membrane connecting strip on the free side of the initial support, and weld a second waterproof membrane on the waterproof membrane connecting strip. S5. Use self-adhesive strips and hot melt pads to bond the front of the insulation board to the second waterproof board on the initial support side. Adjust the deformable connecting groove according to the shape of the tunnel cross section to make the insulation board and the connected second waterproof board fit tightly. S6. After each process is completed, inspect and accept the installation of the insulation board and the second waterproof board in accordance with the design requirements.

2. The rapid construction method for adaptive deformation pre-assembly of waterproof and thermal insulation boards for cold-region tunnels according to claim 1, characterized in that: In step S1, the initial support flatness should meet the requirement that D / L≤1 / 20, where D is the depth of the indentation between two adjacent convex surfaces of the initial support base, and L is the distance between two adjacent convex surfaces of the initial support base.

3. The rapid construction method for adaptive deformation pre-assembly of waterproof and thermal insulation boards for cold-region tunnels according to claim 1, characterized in that: In step S2, three self-adhesive strips are provided on the front and back of the insulation board, and two hot melt pads are provided on each self-adhesive strip.

4. The rapid construction method for adaptive deformation pre-assembly of waterproof and thermal insulation boards for cold-region tunnels according to claim 3, characterized in that: In step S2, the hot melt pad is bonded and fixed to the self-adhesive strip.

5. The rapid construction method for adaptive deformation pre-assembly of waterproof and thermal insulation boards for cold-region tunnels according to claim 1, characterized in that: The cable clamp is a Q345 low carbon steel double-groove type clamp cable clamp; the deformable steel frame is a U29 type steel frame; the insulation layer is made of polyurethane rigid plastic board with a thickness of 3~5cm.

6. The rapid construction method for adaptive deformation pre-assembly of waterproof and thermal insulation boards for cold-region tunnels according to claim 1, characterized in that: In step S5, the flatness of the insulation board should meet the requirement that D / L≤1 / 30, where D is the depth of the indentation between two adjacent convex surfaces of the initial support base, and L is the distance between two adjacent convex surfaces of the initial support base.

7. The rapid construction method for adaptive deformation pre-assembly of waterproof and thermal insulation board for cold-region tunnels according to claim 6, characterized in that: In step S5, after the overall installation of the insulation board is completed, the tightness of the insulation board is checked. If it does not meet the requirements, it is reinforced by adjusting the deformable connecting groove until the design requirements are met.

8. The rapid construction method for adaptive deformation pre-assembly of waterproof and thermal insulation boards for cold-region tunnels according to claim 1, characterized in that: The insulation board is made of rigid polyurethane board with a thickness of 5cm-8cm; the first waterproof board and the second waterproof board are made of EVA material board with a thickness of 1.5mm-5mm.

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