Tunnel segment sealing gasket based on bionic multi-level microstructure array and preparation method thereof

Abstract

The present invention discloses a tunnel segment sealing gasket based on a bionic multi-level microstructure array and a preparation method thereof. The tunnel segment sealing gasket based on a bionic multi-level microstructure array comprises: a first gasket body, used to connect a first tunnel segment; a second gasket body, used to connect a second tunnel segment adjacent to the first tunnel segment; a first bionic multi-level microstructure array is formed on the first gasket body; a second bionic multi-level microstructure array is formed on the second gasket body, the second bionic multi-level microstructure array and the first bionic multi-level microstructure array are mutually embedded and abutted, so as to realize a sealed connection between the second gasket body and the first gasket body. When the first gasket body and the second gasket body are in contact with each other, the first bionic multi-level microstructure array and the second bionic multi-level microstructure array are mutually embedded and abutted, and the two form a multi-level contact, which is not easy to form a gap and has better sealing performance.

Description

Technical Field

[0001] The invention relates to the technical field of pipe segment sealing gaskets, and in particular to a tunnel pipe segment sealing gasket based on a bionic multi-level microstructure array and a preparation method thereof. Background Art

[0002] There are many methods for constructing underwater tunnels, including shield method, immersed tube method and open-cut method with cofferdam. Among them, shield method is widely used due to its small environmental impact, fast construction speed and high construction quality. The high external water pressure poses a great challenge to the existing shield tunnel waterproofing system.

[0003] The waterproofing of the shield tunnel segment joints is the weak link in the waterproofing of the entire shield tunnel. In the waterproofing of the segment joints, the sealing gasket made of elastic rubber is the main component and plays a major role. In the prior art, after the tunnel segment sealing gasket is squeezed and deformed, gaps appear on the contact surface of the sealing gasket and the sealing gasket, resulting in a decrease in sealing performance.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a tunnel segment sealing gasket based on a bionic multi-level microstructure array and a preparation method thereof are provided, aiming to solve the problem in the prior art that gaps appear on the contact surfaces between sealing gaskets, resulting in a decrease in sealing performance.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0007] A tunnel segment sealing gasket based on a bionic multi-level microstructure array, comprising:

[0008] A first cushion body, used for connecting the first tunnel segment;

[0009] A second cushion body, used for connecting a second tunnel segment adjacent to the first tunnel segment;

[0010] Wherein, a first bionic multi-level microstructure array is formed on the first pad body;

[0011] A second bionic multi-level microstructure array is formed on the second pad body, and the second bionic multi-level microstructure array and the first bionic multi-level microstructure array are mutually embedded and abutted to achieve a sealed connection between the second pad body and the first pad body.

[0012] The tunnel segment sealing gasket based on the bionic multi-level microstructure array, wherein the first bionic multi-level microstructure array and the second bionic multi-level microstructure array both include:

[0013] A primary raised structure array;

[0014] A secondary protrusion structure array, arranged on the primary protrusion structure array;

[0015] Wherein, the size of the primary protrusion structure in the primary protrusion structure array is micrometer-level;

[0016] The size of the secondary protrusion structure in the secondary protrusion structure array is smaller than the size of the primary protrusion structure.

[0017] The tunnel segment sealing gasket based on the bionic multi-level microstructure array, wherein the primary protruding structure of the first bionic multi-level microstructure array is located between two adjacent primary protruding structures of the second bionic multi-level microstructure array.

[0018] The tunnel segment sealing gasket based on the bionic multi-level microstructure array, wherein the first-level protrusion structure is a cone-shaped protrusion;

[0019] The secondary protrusion structure is a strip-shaped protrusion.

[0020] In the tunnel segment sealing gasket based on the bionic multi-level microstructure array, the strip-shaped protrusions are arranged around the central axis of the cone-shaped protrusion, or the strip-shaped protrusions are symmetrically arranged on both sides of the cone-shaped protrusion.

[0021] A method for preparing a tunnel segment sealing gasket based on a bionic multi-level microstructure array as described in any one of the above, comprising the steps of:

[0022] Providing a first pad to be processed and a second pad to be processed;

[0023] Placing the first pad to be processed on a three-dimensional moving platform, and scanning the first pad to be processed using a focused laser processing system to form a first bionic multi-level microstructure array, thereby obtaining a first pad body;

[0024] The second pad to be processed is placed on a three-dimensional mobile platform, and a focused laser processing system is used to scan the second pad to be processed to form a second bionic multi-level microstructure array to obtain a second pad body; wherein the first pad body and the second pad body form a tunnel segment sealing pad based on the bionic multi-level microstructure array.

[0025] The method for preparing the tunnel segment sealing gasket based on the bionic multi-level microstructure array, wherein the focused laser processing system comprises:

[0026] Lasers;

[0027] A shutter, located in the light emitting direction of the laser;

[0028] A lens is used to focus the laser light of the laser.

[0029] The method for preparing a tunnel segment sealing gasket based on a bionic multi-level microstructure array, wherein the first pad to be processed is placed on a three-dimensional mobile platform, and a focused laser processing system is used to scan the first pad to be processed to form a first bionic multi-level microstructure array to obtain a first pad body, comprising:

[0030] Placing the first pad to be processed on the three-dimensional moving platform, and controlling the movement of the three-dimensional moving platform according to the focus of the lens so that the focus of the lens is located inside the first pad to be processed;

[0031] The laser is started, the three-dimensional mobile platform is controlled to continuously translate along a preset trajectory, and the shutter is controlled to open, so as to form a first bionic multi-level microstructure array on the first pad to be processed to obtain a first pad body.

[0032] The method for preparing the tunnel segment sealing gasket based on the bionic multi-level microstructure array, wherein the second pad to be processed is placed on a three-dimensional mobile platform, and the second pad to be processed is scanned by a focused laser processing system to form a second bionic multi-level microstructure array to obtain a second pad body, comprising:

[0033] Placing the second pad to be processed on the three-dimensional moving platform, and controlling the movement of the three-dimensional moving platform according to the focus of the lens so that the focus of the lens is located inside the second pad to be processed;

[0034] The laser is started, the three-dimensional mobile platform is controlled to continuously translate along a preset trajectory, and the shutter is controlled to open, so as to form a second bionic multi-level microstructure array on the second pad to be processed to obtain a second pad body.

[0035] The method for preparing the tunnel segment sealing gasket based on the bionic multi-level microstructure array, wherein the providing of the first gasket to be processed and the second gasket to be processed comprises:

[0036] Cleaning the first pad to be processed and the second pad to be processed;

[0037] The preparation method further comprises:

[0038] Cleaning the first pad body;

[0039] The second pad body is cleaned.

[0040] Beneficial effect: When the first cushion body and the second cushion body are in contact with each other, the first bionic multi-level microstructure array and the second bionic multi-level microstructure array are interlocked and abutted against each other, and the two form multi-level contact, which is not easy to form gaps and has better sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1It is a schematic structural diagram of a tunnel segment sealing gasket based on a bionic multi-level microstructure array in an embodiment of the present invention.

[0042] Figure 2 Schematic diagram of the structure of the first pad body in an embodiment of the present invention.

[0043] Figure 3 Schematic diagram of the structure of the first cushion body and the second cushion body in an embodiment of the present invention.

[0044] Figure 4 It is a schematic structural diagram of a focused laser processing system in an embodiment of the present invention.

[0045] Figure 5 Schematic diagram of the laser and the pad to be processed in an embodiment of the present invention.

[0046] Figure 6 Schematic diagram of a preset trajectory in an embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 1. First tunnel segment; 2. Second tunnel segment; 3. Pad to be processed; 4. Three-dimensional mobile platform; 5. Laser; 6. Shutter; 7. Lens; 8. Diaphragm; 9. Reflector group; 10. First pad body; 11. First bionic multi-level microstructure array; 20. Second pad body; 21. Second bionic multi-level microstructure array; 1a. Primary protruding structure array; 2a. Secondary protruding structure array. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0050] Please also see Figure 1-Figure 3 The present invention provides some embodiments of a tunnel segment sealing gasket based on a bionic multi-level microstructure array.

[0051] like Figure 1 As shown, the tunnel segment sealing gasket based on the bionic multi-level microstructure array of the present invention comprises:

[0052] A first cushion body 10, used for connecting the first tunnel segment 1;

[0053] A second cushion body 20, used for connecting a second tunnel segment 2 adjacent to the first tunnel segment 1;

[0054] Wherein, a first bionic multi-level microstructure array 11 is formed on the first pad body 10;

[0055] A second bionic multilevel microstructure array 21 is formed on the second pad body 20 , and the second bionic multilevel microstructure array 21 is interlocked and abutted with the first bionic multilevel microstructure array 11 to achieve a sealed connection between the second pad body 20 and the first pad body 10 .

[0056] Specifically, each tunnel segment sealing gasket has two gasket bodies, namely, a first gasket body 10 and a second gasket body 20. The first gasket body 10 and the second gasket body 20 are fitted and abutted against each other to achieve sealing of the interface between the first gasket body 10 and the second gasket body 20. Since the first gasket body 10 forms a first bionic multi-level microstructure array 11 on the side facing the second gasket body 20, and the second gasket body 20 forms a second bionic multi-level microstructure array 21 on the side facing the first gasket body 10. When the first gasket body 10 and the second gasket body 20 are in contact with each other, the first bionic multi-level microstructure array 11 and the second bionic multi-level microstructure array 21 are fitted and abutted against each other, and the two form multi-level contact, which is not easy to form gaps and has better sealing performance.

[0057] The tunnel segment usually has four splicing sides, and the splicing sides of the tunnel segment are against the splicing sides of the adjacent tunnel segment, and multiple tunnel segments are spliced ​​to form a cylindrical tunnel. The splicing sides are usually arc-shaped or straight-line-shaped, and the pad body is connected to the splicing sides of the tunnel segment (for example, it can be bonded), the pad body on the straight-line splicing side forms a straight-line sealing pad, and the pad body on the arc-shaped splicing side forms an annular sealing pad, and the two ends of the straight-line sealing pad respectively abut against two adjacent annular sealing pads, and there can be multiple straight-line sealing pads between two adjacent annular sealing pads.

[0058] The second tunnel segment 2 and the first tunnel segment 1 are adjacent tunnel segments, the first cushion body 10 is connected to the first tunnel segment 1, the second cushion body 20 is connected to the second tunnel segment 2, the first tunnel segment 1 and the second tunnel segment 2 are adjacent, and the first cushion body 10 and the second cushion body 20 are in contact with each other to achieve sealing between the first tunnel segment 1 and the second tunnel segment 2.

[0059] Since there may be misaligned splicing when the tunnel segments are spliced, for example, in addition to splicing a portion of the splicing side surface of the first tunnel segment 1 with the splicing side surface of the second tunnel segment 2, another portion of the splicing side surface of the first tunnel segment 1 is also spliced ​​with the splicing side surface of the third tunnel segment. Then the first cushion body 10 of the splicing side surface of the first tunnel segment 1 is embedded and abutted with the second cushion body 20 of the splicing side surface of the second tunnel segment 2, and the first cushion body 10 of the splicing side surface of the first tunnel segment 1 is also embedded and abutted with the second cushion body 20 of the splicing side surface of the third tunnel segment, thereby forming a misaligned abutment. Misaligned abutment may exist in both linear and annular sealing gaskets, which is specifically related to the misaligned splicing form of the tunnel segments.

[0060] The first bionic multi-level microstructure array 11 and the second bionic multi-level microstructure array 21 are both bionic multi-level microstructure arrays. When the upper and lower teeth of sharks are tightly bitten, they can generate strong squeezing force to prevent prey from escaping; scallops can firmly cling to the coast constantly hit by waves, thanks to the ridged non-smooth structure on their body surface. Based on the micro-nano structure of shark teeth and scallop surfaces, the bionic multi-level microstructure array is designed.

[0061] In a preferred implementation of the embodiment of the present invention, Figure 1-Figure 3 As shown, the first bionic multi-level microstructure array 11 and the second bionic multi-level microstructure array 21 both include:

[0062] A primary protrusion structure array 1a;

[0063] A secondary protrusion structure array 2a, arranged on the primary protrusion structure array 1a;

[0064] Wherein, the size of the primary protrusion structure in the primary protrusion structure array 1a is micrometer level;

[0065] The size of the secondary protrusion structure in the secondary protrusion structure array 2a is smaller than the size of the primary protrusion structure.

[0066] Specifically, the bionic multi-level microstructure array has a primary convex structure array 1a and a secondary convex structure array 2a, and the primary convex structure array 1a is located at the edge of the pad body (for example, the edge of the first pad body 10 or the edge of the second pad body 20). The primary convex structure array 1a is continuously distributed. The secondary convex structure array 2a is arranged on the primary convex structure array 1a, and the secondary convex structure array 2a is continuously distributed. The area between two adjacent primary convex structures in the primary convex structure array 1a (the area may be the edge of the pad body) is also provided with the secondary convex structure array 2a.

[0067] The size of the primary protrusion structure is micrometer-level, for example, the length, width and height of the primary protrusion structure are all micrometer-level. The size of the secondary protrusion structure is smaller than that of the primary protrusion structure, and the size of the secondary protrusion structure is submicrometer-level, for example, the size of the secondary protrusion structure is 10nm-990nm.

[0068] In a preferred implementation of the embodiment of the present invention, Figure 3 As shown, the primary protruding structure of the first bionic multi-level microstructure array 11 is located between two adjacent primary protruding structures of the second bionic multi-level microstructure array 21 .

[0069] Specifically, the first pad body 10 and the second pad body 20 abut against each other, there is a primary protrusion structure array 1a in the first bionic multi-level microstructure array 11 on the first pad body 10, and there is also a primary protrusion structure array 1a in the second bionic multi-level microstructure array 21 on the second pad body 20, the primary protrusion structure on the first pad body 10 is located between two adjacent primary protrusion structures on the second pad body 20, and the primary protrusion structures on the two pad bodies are embedded in each other, so the secondary protrusion structures on the two pad bodies abut against each other.

[0070] The bionic multi-level microstructure array that is staggered and coordinated with each other can effectively prevent fluid leakage by increasing the effective contact area between the opposite first pad body 10 and the second pad body 20, reducing the effective area of ​​the leakage channel, forming multiple blocking surfaces and cavities in the direction of fluid flow, and using the pressure difference between the inside and the outside to compress itself in the direction of fluid leakage.

[0071] In a preferred implementation of the embodiment of the present invention, Figure 1-Figure 3 As shown, the primary protrusion structure is a cone-shaped protrusion.

[0072] Specifically, the primary protrusion structure is a conical protrusion, the upper end of the conical protrusion is smaller, and the lower end of the conical protrusion is larger. The conical protrusions can be arranged in an array, for example, in a matrix arrangement, there is a groove between the four conical protrusions, and the conical protrusion of another pad can be inserted into the groove. The four conical protrusions on the first pad 10 limit the conical protrusion between the four conical protrusions on the second pad 20, which can not only increase the friction between the first pad 10 and the second pad 20, but also improve the sealing effect between the first pad 10 and the second pad 20.

[0073] In a preferred implementation of the embodiment of the present invention, Figure 3 As shown, the secondary protrusion structure is a strip-shaped protrusion.

[0074] Specifically, the secondary protrusion structure is a strip-shaped protrusion. Of course, the secondary protrusion structure can also be other shapes, such as columnar protrusions, spherical crown protrusions, etc.

[0075] In a preferred implementation manner of the embodiment of the present invention, the strip-shaped protrusions are arranged around the central axis of the conical protrusions.

[0076] Specifically, the secondary protrusion structure is arranged around the central axis of the primary protrusion structure, and the strip protrusion is arranged around the central axis of the conical protrusion. There may be one strip protrusion or multiple strip protrusions on a circle of the conical protrusion around the central axis.

[0077] In a preferred implementation manner of the embodiment of the present invention, the strip-shaped protrusions are symmetrically arranged on both sides of the cone-shaped protrusion.

[0078] Specifically, the strip-shaped protrusions are respectively located on both sides of the cone-shaped protrusions and are symmetrically arranged. The length direction of the strip-shaped protrusions is perpendicular to the radial direction of the tunnel segment, and the radial direction of the tunnel segment is the leakage direction. When the strip-shaped protrusions are perpendicular to the radial direction of the tunnel segment, the leakage resistance can be increased to the greatest extent.

[0079] The tunnel segment sealing gasket based on the bionic multi-level microstructure array of the present application has the following technical effects:

[0080] (1) The interlaced bionic multi-level microstructure array increases the effective contact area between the opposite directions, reduces the effective area of ​​the leakage channel, and increases the leakage resistance.

[0081] (2) The bionic multi-level microstructure array that is staggered and coordinated with each other forms multiple blocking surfaces and cavities in the direction of fluid flow, which reduces the pressure of the fluid and effectively prevents fluid leakage.

[0082] (3) The bionic multi-level microstructure arrays that interlock with each other take advantage of the pressure difference between the inside and outside of the gasket, which causes leakage. Since the surface of the gasket is no longer a plane, the bionic multi-level microstructure arrays not only have the clamping effect of the tunnel segments, but also have the compression effect of the bionic multi-level microstructure arrays in the direction of fluid leakage caused by the pressure difference between the inside and outside, which further reduces the effective area of ​​the leakage channel and increases the leakage resistance.

[0083] (4) The bionic multi-level microstructure array is self-assembled by femtosecond laser irradiation, with high processing efficiency.

[0084] (5) The thermal effect of femtosecond laser processing is relatively small, which reduces the possibility of damage to the main structure of the gasket during surface microstructure processing and improves the safety of the gasket structure.

[0085] Based on the tunnel segment sealing gasket based on the bionic multi-level microstructure array described in any of the above embodiments, the present invention also provides a preferred embodiment of a method for preparing a tunnel segment sealing gasket based on the bionic multi-level microstructure array:

[0086] The method for preparing a tunnel segment sealing gasket based on a bionic multi-level microstructure array according to an embodiment of the present invention comprises the following steps:

[0087] Step S100, providing a first pad to be processed and a second pad to be processed;

[0088] Step S200, placing the first pad to be processed on a three-dimensional mobile platform, and scanning the first pad to be processed using a focused laser processing system to form a first bionic multi-level microstructure array to obtain a first pad body;

[0089] Step S300, placing the second pad to be processed on a three-dimensional mobile platform, and using a focused laser processing system to scan the second pad to be processed to form a second bionic multi-level microstructure array to obtain a second pad body; wherein the first pad body and the second pad body form a tunnel segment sealing pad based on the bionic multi-level microstructure array.

[0090] Specifically, the surface of the pad 3 to be processed is a flat surface. After the pad 3 to be processed is processed, a bionic multi-level microstructure array is formed on the surface of the pad 3 to be processed. During preparation, the processing process of the first pad body and the second pad body is the same or different. For example, a larger pad 3 to be processed can be used to form a bionic multi-level microstructure array, and then cut to obtain the first pad body and the second pad body. For another example, the first pad to be processed and the second pad to be processed can be processed to obtain the first pad body and the second pad body.

[0091] The pad 3 to be processed can be made of rubber, for example, elastic rubber, which has a certain deformation ability, and can automatically align the secondary microstructure array of the bionic multi-level microstructure array during the pressurization of the tunnel segment. The primary microstructure array of the first pad body and the primary microstructure array of the second pad body are staggered and embedded with each other, so the first pad body and the second pad body need to be aligned, and the alignment methods include mechanical slot limiting, manual alignment, etc.

[0092] like Figure 4 He Ru Figure 5 As shown, when processing the bionic multi-level microstructure array, a focused laser processing system is used to process the pad 3 to be processed. The bionic multi-level microstructure array is generated by laser irradiation self-assembly, and the processing efficiency is high. The focused laser processing system includes:

[0093] Laser 5;

[0094] A shutter 6, located in the light emitting direction of the laser 5;

[0095] The lens 7 is used to focus the laser light of the laser 5 .

[0096] Specifically, the laser 5 can be a femtosecond laser, which emits horizontal linear polarized laser light with a wavelength of 1030nm, a repetition frequency of 75kHz, a pulse width of 215fs, and a maximum output power of 15W. The smaller thermal effect of the femtosecond laser reduces the possibility that the pad 3 to be processed is damaged and the intensity is reduced during the surface microstructure processing. The shutter 6 is used to control or block the laser light emitted by the laser 5, and the lens 7 is used to focus the laser light emitted by the laser 5. The lens 7 can be a double convex lens with a focal length of f=50mm. The shutter 6 can be an electrically controlled mechanical shutter, and the minimum resolution time of the electrically controlled mechanical shutter is 10ms.

[0097] like Figure 4 As shown, the focused laser processing system also includes:

[0098] The aperture 8 and the reflector group 9 are located between the light gate and the lens 7 .

[0099] Specifically, the aperture 8 is used to adjust the spot diameter of the laser emitted by the laser 5, and the reflector group 9 is used to change the propagation direction of the laser. The aperture 8 adjusts the spot diameter of the outgoing light beam to 6 mm. The actual reflectivity of the total reflector to the used laser is greater than 99.5%.

[0100] Step S100 specifically includes:

[0101] Step S110, cleaning the first pad to be processed and the second pad to be processed.

[0102] Specifically, before processing the pad 3, the pad 3 is cleaned to remove dust and stains on the surface of the pad 3. Specifically, ultrasonic cleaning can be used, for example, the pad 3 is placed in water and ultrasonically cleaned for 5 to 15 minutes.

[0103] Step S200 specifically includes:

[0104] Step S210, placing the first pad to be processed on the three-dimensional moving platform, and controlling the movement of the three-dimensional moving platform according to the focus of the lens so that the focus of the lens is located inside the first pad to be processed;

[0105] Step S220, start the laser, control the three-dimensional mobile platform to continuously translate along a preset trajectory, and control the shutter to open, so as to form a first bionic multi-level microstructure array on the first pad to be processed to obtain a first pad body.

[0106] Specifically, Figure 5 As shown, after placing the pad 3 to be processed on the three-dimensional mobile platform 4, the three-dimensional mobile platform 4 is controlled to move the pad 3 to be processed to the initial position. When the pad 3 to be processed is at the initial position, a certain defocus amount Δz is formed, and the focus of the lens 7 is not located on the surface of the pad 3 to be processed, but is located inside the pad 3 to be processed. The distance between the focus and the surface of the pad 3 to be processed is the defocus amount Δz. The defocus amount processing method is beneficial to the formation of a bionic multi-level microstructure array. Before processing, the shutter 6 is in a closed state. After starting the laser 5, since the shutter 6 is in a closed state, the pad 3 to be processed will not be processed. After controlling the three-dimensional mobile platform 4 to translate the pad 3 to be processed, the shutter 6 is controlled to open, and the laser reaches the pad 3 to be processed, performs scanning processing, and forms a bionic multi-level microstructure array. As shown Figure 6As shown, during the processing, the three-dimensional mobile platform 4 is translated along a preset trajectory, for example, a "J"-shaped preset trajectory is adopted. If the interval Δd of the "J"-shaped preset trajectory is smaller than the diameter of the laser spot on the surface of the pad 3 to be processed, a line scanning processing method with overlapping spots can be formed. The translation of the three-dimensional mobile platform 4 can adopt a step-by-step translation method, and the length direction of the strip protrusion is consistent with the direction of the preset trajectory.

[0107] Step S200 also includes:

[0108] Step S230: cleaning the first pad body.

[0109] Specifically, after the first cushion body is processed, the first cushion body can be further cleaned to remove the splashes remaining during the processing. Specifically, ultrasonic cleaning can be used, for example, the first cushion body is placed in water and ultrasonically cleaned for 5 to 15 minutes.

[0110] Step S300 specifically includes:

[0111] Step S310, placing the second pad to be processed on the three-dimensional moving platform, and controlling the movement of the three-dimensional moving platform according to the focus of the lens so that the focus of the lens is located inside the second pad to be processed;

[0112] Step S320, start the laser, control the three-dimensional mobile platform to continuously translate along a preset trajectory, and control the shutter to open, so as to form a second bionic multi-level microstructure array on the second pad to be processed to obtain a second pad body.

[0113] Specifically, the processing of the second pad body is completely consistent with the processing of the first pad body. Alternatively, the processing steps of the second pad body may be consistent with the processing steps of the first pad body, and different processing parameters may be used in specific parameters to form different bionic multi-level microstructure arrays, for example, the first bionic multi-level microstructure array and the second bionic multi-level microstructure array have different sizes and morphologies.

[0114] Step S300 also includes:

[0115] Step S330: cleaning the second pad body.

[0116] Specifically, after the second pad body is processed, the second pad body can be further cleaned to remove the splashes remaining during the processing. Specifically, ultrasonic cleaning can be used, for example, the second pad body is placed in water and ultrasonically cleaned for 5 to 15 minutes.

[0117] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A tunnel segment sealing gasket based on a bionic multi-level microstructure array, characterized in that: include: A first cushion body, used for connecting the first tunnel segment; A second cushion body, used for connecting a second tunnel segment adjacent to the first tunnel segment; Wherein, a first bionic multi-level microstructure array is formed on the first pad body; A second bionic multi-level microstructure array is formed on the second cushion body, and the second bionic multi-level microstructure array and the first bionic multi-level microstructure array are mutually embedded and abutted, so as to achieve a sealed connection between the second cushion body and the first cushion body; The first bionic multi-level microstructure array and the second bionic multi-level microstructure array both include: A primary raised structure array; A secondary protrusion structure array, arranged on the primary protrusion structure array; Wherein, the size of the primary protrusion structure in the primary protrusion structure array is micrometer-level; The size of the secondary protrusion structure in the secondary protrusion structure array is smaller than the size of the primary protrusion structure; The primary protrusion structure of the first bionic multi-level microstructure array is located between two adjacent primary protrusion structures of the second bionic multi-level microstructure array; The primary protrusion structure is a cone-shaped protrusion; The secondary protrusion structure is a strip-shaped protrusion; The strip-shaped protrusions are arranged around the central axis of the cone-shaped protrusion, or the strip-shaped protrusions are symmetrically arranged on both sides of the cone-shaped protrusion.

2. A method for preparing a tunnel segment sealing gasket based on a bionic multi-level microstructure array as claimed in claim 1, characterized in that: Includes steps: Providing a first pad to be processed and a second pad to be processed; Placing the first pad to be processed on a three-dimensional moving platform, and scanning the first pad to be processed using a focused laser processing system to form a first bionic multi-level microstructure array, thereby obtaining a first pad body; The second pad to be processed is placed on a three-dimensional mobile platform, and a focused laser processing system is used to scan the second pad to be processed to form a second bionic multi-level microstructure array to obtain a second pad body; wherein the first pad body and the second pad body form a tunnel segment sealing pad based on the bionic multi-level microstructure array.

3. The method for preparing a tunnel segment sealing gasket based on a bionic multi-level microstructure array according to claim 2, characterized in that: The focused laser processing system comprises: Lasers; A shutter, located in the light emitting direction of the laser; A lens is used to focus the laser light of the laser.

4. The method for preparing a tunnel segment sealing gasket based on a bionic multi-level microstructure array according to claim 3, characterized in that: The first pad to be processed is placed on a three-dimensional mobile platform, and a focused laser processing system is used to scan the first pad to be processed to form a first bionic multi-level microstructure array to obtain a first pad body, including: Placing the first pad to be processed on the three-dimensional moving platform, and controlling the movement of the three-dimensional moving platform according to the focus of the lens so that the focus of the lens is located inside the first pad to be processed; The laser is started, the three-dimensional mobile platform is controlled to continuously translate along a preset trajectory, and the shutter is controlled to open, so as to form a first bionic multi-level microstructure array on the first pad to be processed to obtain a first pad body.

5. The method for preparing a tunnel segment sealing gasket based on a bionic multi-level microstructure array according to claim 3, characterized in that: The second pad to be processed is placed on a three-dimensional moving platform, and a focused laser processing system is used to scan the second pad to be processed to form a second bionic multi-level microstructure array to obtain a second pad body, including: Placing the second pad to be processed on the three-dimensional moving platform, and controlling the movement of the three-dimensional moving platform according to the focus of the lens so that the focus of the lens is located inside the second pad to be processed; The laser is started, the three-dimensional mobile platform is controlled to continuously translate along a preset trajectory, and the shutter is controlled to open, so as to form a second bionic multi-level microstructure array on the second pad to be processed to obtain a second pad body.

6. The method for preparing a tunnel segment sealing gasket based on a bionic multi-level microstructure array according to claim 2, characterized in that: The providing of a first pad to be processed and a second pad to be processed comprises: Cleaning the first pad to be processed and the second pad to be processed; The preparation method further comprises: Cleaning the first pad body; The second pad body is cleaned.

Images