Airfield pavement three-dimensional interlocking interface structure system and forming method thereof

Abstract

The invention provides an airport pavement three-dimensional interlocking interface structure system and a forming method thereof. The airport pavement three-dimensional interlocking interface structure system comprises a base layer and a surface layer, and an array type macroscopic interlocking structure is arranged on the base layer; a microscopic interlocking structure is further arranged on the inner side surface of the macroscopic interlocking structure; a transition layer is also arranged on the micro interlocking structure; the surface layer is filled on the upper surface of the base layer with the macroscopic interlocking structure, the microcosmic interlocking structure and the transition layer; macroscopic mechanical anchoring is provided through the macroscopic interlocking structure of the trapezoidal groove structure, most of interlayer shear force and uplift force are borne and transmitted, the interface shear strength and uplift force are improved to a large extent by matching with the occlusion effect of the microtextures, and by means of geometric parameter optimization of the trapezoidal grooves and the stress dispersion effect of the microtextures, the interface shear strength and uplift force are improved to a large extent. The maximum shear stress of the interface is further reduced, and the problem of stress concentration at edges and corners is effectively avoided; stress generated by temperature change and material difference is absorbed and buffered in combination with the transition layer, and the overall durability is improved.

Description

Technical Field

[0001] This invention relates to the field of civil engineering and composite structure interface enhancement technology, and in particular to a three-dimensional interlocking interface structure system for airport pavement and its formation method. Background Technology

[0002] In the field of civil engineering infrastructure construction and maintenance, multi-layer composite structural systems (such as asphalt overlay on old cement concrete pavement, steel bridge deck paving, airport composite pavement, etc.) are widely used. The overall performance, load-bearing capacity, and service life of such structures largely depend on whether their interlayer interfaces can efficiently and persistently transfer shear stress, tensile stress, and bending moment.

[0003] Currently, the commonly used interface treatment technologies are mainly divided into adhesive layer technology and surface roughening treatment technology. Both of these technologies have obvious defects. Especially in situations where extreme loads and harsh environments occur, such as airport pavements, heavy traffic arteries, and long-span bridges, the shortcomings of existing interface technologies have become a key bottleneck restricting the overall durability of the structure.

[0004] Among these technologies, adhesive layer techniques rely on organic materials such as emulsified asphalt, polymer-modified asphalt, or epoxy resin as the bonding medium. The core problem with this type of technology is that the properties of organic materials are sensitive to temperature. Long-term exposure to ultraviolet light, oxygen, and moisture can easily lead to chemical aging and performance degradation, resulting in a significant decline in adhesion over time and creating long-term safety hazards. Surface roughening techniques increase the surface roughness of the base layer through methods such as chiseling, roughening, and sandblasting. Their drawbacks include random and uneven roughness, limited mechanical interlocking force, and a lack of three-dimensional constraint; the treatment depth is shallow, failing to provide macroscopic anchoring; and under repeated heavy and impact loads, the surface roughness protrusions are easily sheared off, leading to rapid degradation of interfacial properties.

[0005] Therefore, there is an urgent need for a new interface enhancement technology that does not rely on organic binders, can provide designable, powerful three-dimensional regular geometric mechanical locking capabilities, and has a standardized quality control process. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a three-dimensional interlocking interface structure system for airport pavements and its formation method. This invention is based on a novel interface enhancement system with multi-scale interlocking structure and transition layer design to solve the problems in the background technology.

[0007] In a first aspect, the present invention provides a three-dimensional interlocking interface structure system for airport pavement, comprising a base layer and a surface layer, wherein an array-type macroscopic interlocking structure is provided on the base layer; a microscopic interlocking structure is also provided on the inner surface of the macroscopic interlocking structure; a transition layer is also provided on the microscopic interlocking structure; and the surface layer is filled on the upper surface of the base layer having the macroscopic interlocking structure, the microscopic interlocking structure, and the transition layer.

[0008] Preferably, the macroscopic interlocking structure is a trapezoidal groove set on the base layer, and the trapezoidal groove is arranged in a regular array on the surface of the base layer, the array being a parallel stripe structure or a grid pattern structure.

[0009] Preferably, the sidewall inclination angle of the trapezoidal groove is 30°-45°, and the bottom of the trapezoidal groove and all inner corners are rounded, with the radius of the rounded arc being ≥ 2mm.

[0010] The upper opening of the trapezoidal groove has a width of 15-25mm; the lower opening has a width of 10-18mm, and the upper opening is wider than the lower opening, and the depth of the trapezoidal groove is 3-6mm.

[0011] Preferably, the sidewall inclination angle of the trapezoidal groove is 20°-30°, and the bottom of the trapezoidal groove and all inner corners are rounded, with the radius of the rounded arc being ≥ 2mm.

[0012] The upper opening of the trapezoidal groove has a width of 10-18mm; the lower opening has a width of 5-12mm, and the upper opening is wider than the lower opening, and the depth of the trapezoidal groove is 6-10mm.

[0013] Preferably, the center distance between two adjacent trapezoidal grooves is twice the length of the top opening of the trapezoidal groove.

[0014] Preferably, the micro-interlocking structure is a micron-level surface texture structure obtained by sandblasting; the surface roughness Ra of the micron-level surface texture structure is 2μm-12μm.

[0015] Preferably, the material of the micron-scale surface texture structure is an abrasive.

[0016] Preferably, the transition layer is an adhesive layer coated on a micron-scale surface texture structure, and its material is SBS modified bitumen.

[0017] Preferably, the transition layer is a flexible microporous pad or an elastic sealant.

[0018] Secondly, the present invention provides a method for forming a three-dimensional interlocking interface structure system for airport pavement, comprising the following steps:

[0019] S1) Based on the material properties of the base layer and surface layer, traffic load level and environmental conditions, establish a parameter optimization finite element model; optimize and determine the type, geometric parameters, array arrangement mode and rounded chamfer size of the macroscopic interlocking structure;

[0020] S2) Based on the type, geometric parameters, array arrangement mode and chamfer size of the macroscopic interlocking structure, a CNC milling machine is used with a chamfer forming cutter head to precisely cut a trapezoidal groove array on the base surface;

[0021] S3) Select a suitable abrasive and use an automatic sandblasting machine to perform full-coverage sandblasting on the inner surface of the trapezoidal groove array until the roughness Ra reaches the preset value to obtain a micron-level surface texture structure.

[0022] S4) Uniformly coat the micron-scale surface texture structure after sandblasting with SBS modified bitumen or fill it with a flexible microporous pad or inject elastic sealant to form a transition layer.

[0023] S5) Based on the macroscopic interlocking structure type, the ratio of the surface material is adjusted; and a screed equipped with high-frequency vibration function is used to spread the surface material until the surface material is densely filled to the bottom of the trapezoidal groove.

[0024] S6) Overlap, slow, and multiple compactions are performed on the strip area where the macro interlocking structure is located, while monitoring the paving temperature, vibration parameters, and number of compaction passes in real time.

[0025] S7) The compactness of the groove filling is detected by high-frequency ground-penetrating radar (GPR), and the geometric dimensions are verified by a handheld 3D laser scanner. When the GPR test shows no significant defects and the dimensional deviation is ≤ ±0.5mm, the construction quality is deemed qualified.

[0026] Preferably, in step S1), the macroscopic interlocking structure is an array of trapezoidal grooves, and the trapezoidal grooves are of two types: standard and enhanced.

[0027] Preferably, in step S1), the sidewall inclination angle of the standard trapezoidal groove is 30°-45°, and the bottom of the trapezoidal groove and all inner corners are rounded, with the radius of the rounded arc being ≥ 2mm.

[0028] The standard trapezoidal groove has an upper opening width of 15-25mm and a lower opening width of 10-18mm, with the upper opening width being greater than the lower opening width, and the trapezoidal groove depth being 3-6mm.

[0029] Preferably, in step S1), the sidewall inclination angle of the enhanced trapezoidal groove is 20°-30°, and the bottom of the trapezoidal groove and all inner corners are rounded, with the radius of the rounded arc being ≥ 2mm.

[0030] The width of the upper opening of the enhanced trapezoidal groove is 10-18mm; the width of the lower opening is 5-12mm, and the width of the upper opening is greater than the width of the lower opening, and the depth of the trapezoidal groove is 6-10mm.

[0031] Preferably, in step S1), the array arrangement pattern is a parallel stripe structure or a grid pattern structure; wherein, the parallel stripe structure is suitable for unidirectional main force-bearing structures; and the grid pattern structure is suitable for multidirectional force-bearing structures.

[0032] The beneficial effects of this invention are as follows:

[0033] 1. This invention provides macroscopic mechanical anchoring through a macroscopic interlocking structure with trapezoidal grooves. The macroscopic interlocking structure directly bears and transmits more than 90% of the interlayer shear force and pull-out force through the tenon-and-mortise geometric anchoring effect. Combined with the interlocking effect of micro-textures, the interfacial shear strength is increased by 120%-200% and the pull-out force is increased by 150%-250% compared with traditional adhesive layer technology. The reinforced structure is designed for extreme load scenarios such as heavy loads and airports, with shear strength reaching more than 3.5MPa and pull-out force ≥10kN / m², completely solving the problem of interfacial slippage under repeated heavy loads.

[0034] 2. The optimization of the geometric parameters (side wall inclination angle, arc transition, and spacing design) of the trapezoidal groove in this invention, along with the stress dispersion effect of the micro-texture, reduces the maximum shear stress at the interface by 30%-45% and the standard deviation of shear stress by 40%-55%, effectively avoiding the problem of stress concentration at the corners.

[0035] 3. This invention combines a transition layer to absorb and buffer stress caused by temperature changes and material differences, thereby improving overall durability and significantly reducing the risk of fatigue crack initiation and propagation.

[0036] 4. The present invention is based on parametric collaborative design technology using finite element simulation, which can optimize all geometric parameters in advance. At the same time, it can be combined with different construction methods for standard and enhanced structures to avoid the problem of incomplete filling during construction. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the system structure of Embodiment 1 of the present invention;

[0038] Figure 2 This is a schematic diagram of the macroscopic interlocking structure of Embodiment 1 of the present invention;

[0039] Figure 3 This is a schematic diagram of the array-type arrangement of the macroscopic interlocking structure in Embodiment 1 of the present invention;

[0040] Figure 4This is a schematic diagram of the microscopic interlocking structure of Embodiment 1 of the present invention;

[0041] Figure 5 This is a flowchart illustrating the method of Embodiment 2 of the present invention;

[0042] In the diagram, 1-base layer; 2-surface layer; 3-macroscopic interlocking structure. Detailed Implementation

[0043] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0044] Example 1

[0045] like Figure 1 As shown, this embodiment provides a three-dimensional interlocking interface structure system for airport pavement, including a base layer 1 and a surface layer 2. An array-type macroscopic interlocking structure 3 is provided on the base layer 1. A microscopic interlocking structure is also provided on the inner surface of the macroscopic interlocking structure 3. A transition layer is also provided on the microscopic interlocking structure. The surface layer 2 fills the upper surface of the base layer 1, which has the macroscopic interlocking structure 3, the microscopic interlocking structure, and the transition layer.

[0046] In this embodiment, the macroscopic interlocking structure 3 is a trapezoidal groove disposed on the base layer 1. The trapezoidal grooves are arranged in a regular array on the surface of the base layer 1, such as... Figure 3 As shown, the array is a parallel stripe structure or a grid pattern structure; wherein, the parallel stripe structure is suitable for unidirectional main force structures; and the grid pattern structure is suitable for multidirectional force structures.

[0047] In this embodiment, the trapezoidal groove is divided into a standard type and an enhanced type, such as... Figure 2 As shown, the sidewall inclination angle of the standard trapezoidal groove The angle is 30°-45°, and the bottom of the trapezoidal groove and all inner corners are rounded. The radius of the rounded arc is... ≥ 2mm;

[0048] The width of the upper opening of the trapezoidal groove 15-25mm; bottom width The diameter is 10-18mm, and the width of the upper opening is greater than the width of the lower opening, and the depth of the trapezoidal groove is... It is 3-6mm.

[0049] In this embodiment, the sidewall inclination angle of the enhanced trapezoidal groove The angle is 20°-30°, and the bottom of the trapezoidal groove and all its inner corners are rounded. The radius of the rounded arc is... ≥ 2mm;

[0050] The width of the upper opening of the trapezoidal groove 10-18mm; bottom width The width is 5-12mm, and the width of the upper opening is greater than the width of the lower opening, and the depth of the trapezoidal groove is... It is 6-10mm.

[0051] In this embodiment, the center distance between two adjacent trapezoidal grooves is... =2 times the length of the upper opening of the trapezoidal groove .

[0052] In this embodiment, as Figure 4 As shown, the micro-interlocking structure is a micron-level surface texture structure obtained by sandblasting on the inner surface of the trapezoidal groove; the surface roughness of the micron-level surface texture structure is... The thickness ranges from 2μm to 12μm. The material used for the micron-scale surface texture structure is an abrasive, such as steel shot.

[0053] In this embodiment, to address the additional stress problem caused by the mismatch in thermal expansion coefficients between heterogeneous materials, a transition layer is designed between the micron-level surface texture structure and the surface layer 2. The transition layer is an adhesive layer coated on the micron-level surface texture structure, and its material is SBS modified bitumen.

[0054] In some embodiments, the transition layer may also be formed by prefabricated flexible microporous pads or by pouring elastic sealant into trapezoidal grooves with micron-scale surface texture.

[0055] In this embodiment, by filling the surface layer 2 material onto the upper surface of the base layer 1, which has a macroscopic interlocking structure 3, a microscopic interlocking structure, and a transition layer, after curing, the surface layer 2 and the base layer 1 are combined into a whole through the following three synergistic mechanisms: firstly, the geometric anchoring of the macroscopic interlocking structure 3 directly bears and transmits most of the shear stress; secondly, the texture interlocking of the microscopic interlocking structure significantly enhances the tensile strength and crack resistance of the interface; and thirdly, the stress coordination of the transition layer effectively buffers the additional stress caused by thermal expansion and contraction.

[0056] Example 2

[0057] like Figure 5 As shown in the figure, this embodiment provides a method for forming a three-dimensional interlocking interface structure system for airport pavement, including the following steps:

[0058] S1) Based on the material properties of base layer 1 and surface layer 2, traffic load level and environmental conditions, establish a parameter optimization finite element model; optimize and determine the type, geometric parameters, array arrangement mode and rounded chamfer size of macroscopic interlocking structure 3;

[0059] In this embodiment, the macroscopic interlocking structure 3 is of two types: standard and enhanced; the sidewall inclination angle of the standard trapezoidal groove... The angle is 30°-45°, and the bottom of the trapezoidal groove and all inner corners are rounded. The radius of the rounded arc is... ≥ 2mm;

[0060] The width of the upper opening of the trapezoidal groove 15-25mm; bottom width The diameter is 10-18mm, and the width of the upper opening is greater than the width of the lower opening, and the depth of the trapezoidal groove is... It is 3-6mm.

[0061] The sidewall inclination angle of the enhanced trapezoidal groove The angle is 20°-30°, and the bottom of the trapezoidal groove and all its inner corners are rounded. The radius of the rounded arc is... ≥ 2mm;

[0062] The width of the upper opening of the trapezoidal groove 10-18mm; bottom width The width is 5-12mm, and the width of the upper opening is greater than the width of the lower opening, and the depth of the trapezoidal groove is... It is 6-10mm.

[0063] The array arrangement pattern is either a parallel stripe structure or a grid pattern structure; wherein, the parallel stripe structure is suitable for unidirectional main load-bearing structures; and the grid pattern structure is suitable for multidirectional load-bearing structures.

[0064] S2) Based on the type, geometric parameters, array arrangement mode and chamfer size of the macro interlocking structure 3, a CNC milling machine is used with a chamfer forming cutter head to precisely cut a trapezoidal groove array on the surface of the base layer 1.

[0065] S3) Select appropriate abrasive steel shot and use an automatic sandblasting machine to perform full-coverage sandblasting on the inner surface of the trapezoidal groove array until the roughness Ra reaches 2μm-12μm to obtain a micron-level surface texture structure.

[0066] S4) Uniformly coat the micron-scale surface texture structure after sandblasting with SBS modified bitumen or fill it with a flexible microporous pad or inject elastic sealant to form a transition layer.

[0067] S5) Based on the macro-interlocking structure type 3, the material ratio of surface layer 2 is adjusted; and a screed equipped with high-frequency vibration function is used to spread the surface layer 2 material until the surface layer 2 material is densely filled to the bottom of the trapezoidal groove.

[0068] S6) Overlap, slow, and multiple compactions are performed on the strip area where the macro interlocking structure 3 is located, while monitoring the paving temperature, vibration parameters, and number of compaction passes in real time.

[0069] S7) The compactness of the groove filling is detected by high-frequency ground-penetrating radar (GPR), and the geometric dimensions are verified by a handheld 3D laser scanner. When the GPR test shows no significant defects and the dimensional deviation is ≤ ±0.5mm, the construction quality is deemed qualified.

[0070] Example 3

[0071] The three-dimensional interlocking interface structure system and its formation for urban main roads are detailed below:

[0072] The standard trapezoidal groove seating macroscopic interlocking structure 3 is adopted, wherein the sidewall inclination angle of the standard trapezoidal groove is... The angle is 38°, and the bottom of the trapezoidal groove and all its inner corners are rounded. The radius of the rounded arc is... ≥ 3mm;

[0073] The width of the upper opening of the trapezoidal groove is 20mm; bottom width The width of the upper opening is 14mm, and the width of the lower opening is greater than the width of the lower opening; the depth of the trapezoidal groove is 4.5mm; center-to-center distance. The thickness is 40mm; the arrangement pattern is a parallel stripe structure.

[0074] Roughness of micro-interlocking structures The thickness is 6μm; the transition layer uses SBS modified bitumen material.

[0075] The formation and construction methods are as follows:

[0076] S1) Based on the material properties of base layer 1 and surface layer 2, traffic load level and environmental conditions, an optimized finite element model of the cement concrete base layer 1-asphalt surface layer 2 composite structure is established; the above parameters are determined through simulation optimization.

[0077] S2) Based on the type, geometric parameters, array arrangement mode and chamfer size of the macro interlocking structure 3, a CNC milling machine is used with a chamfer forming cutter head to precisely cut a trapezoidal groove array on the surface of the base layer 1.

[0078] S3) Select 0.8mm abrasive steel shot and use an automatic sandblasting machine to perform full-coverage sandblasting on the inner surface of the trapezoidal groove array. After treatment, use a roughness meter to randomly detect 10 points until the roughness Ra reaches 5.5-6.5μm to obtain a micron-level surface texture structure.

[0079] S4) A SBS modified bitumen bonding layer is uniformly coated on the micron-scale surface texture structure after sandblasting to form a transition layer;

[0080] S5) Based on the macro-interlocking structure type 3, the fine aggregate content of the asphalt mixture is increased by 3%, and a warm mix agent is added to reduce the paving temperature; and a screed equipped with high-frequency vibration function is used to pave the surface layer 2 material, with the vibration frequency set to 45Hz, until the surface layer 2 material is densely filled to the bottom of the trapezoidal groove.

[0081] S6) Use a double steel drum roller to compact the strip area where the macro-interlocking structure 3 is located, overlapping by 1 / 3 of the wheel width, at a speed of 2.5 km / h, for 4 passes; record the paving temperature of 145℃, vibration parameters, and number of compaction passes in real time;

[0082] S7) The compactness of the groove filling is detected by 2GHz high-frequency ground penetrating radar (GPR), and the geometric dimensions are verified by handheld 3D laser scanner. When the GPR detection shows no significant defects and the dimensional deviation is ≤±0.3mm, the construction quality is deemed qualified.

[0083] Example 4

[0084] The three-dimensional interlocking interface structure system and its formation for an airport apron (heavy load level) are detailed below:

[0085] An enhanced trapezoidal groove-type macroscopic interlocking structure 3 is adopted for the seat distribution, wherein the sidewall inclination angle of the enhanced trapezoidal groove is... The angle is 25°, and the bottom of the trapezoidal groove and all its inner corners are rounded. The radius of the rounded arc is... ≥ 4mm;

[0086] The width of the upper opening of the trapezoidal groove is 15mm; bottom width The width of the upper opening is 8mm, and the width of the lower opening is greater than the width of the lower opening; the depth of the trapezoidal groove is 8mm; center-to-center distance The thickness is 30mm; the arrangement pattern is a grid pattern structure;

[0087] Roughness of micro-interlocking structures The thickness is 10μm; the transition layer uses SBS modified bitumen material and a flexible microporous pad.

[0088] The formation and construction methods are as follows:

[0089] S1) Based on the material properties of base layer 1 and surface layer 2, traffic load level and environmental conditions, an optimized finite element model of the airport pavement composite structure is established; the above parameters are determined through simulation optimization.

[0090] S2) Based on the type, geometric parameters, array arrangement mode and chamfer size of the macro interlocking structure 3, a CNC milling machine is used with a chamfer forming cutter head to precisely cut a trapezoidal groove array on the surface of the base layer 1.

[0091] S3) Select 1.2mm abrasive steel shot and use an automatic sandblasting machine to perform full-coverage sandblasting on the inner surface of the trapezoidal groove array. After treatment, use a roughness meter to randomly detect 10 points until the roughness Ra reaches 9-11μm to obtain a micron-level surface texture structure.

[0092] S4) First, uniformly coat the SBS modified bitumen bonding layer on the micron-level surface texture structure after sandblasting, and then lay a 2mm thick flexible microporous pad in the trapezoidal groove to form a transition layer.

[0093] S5) Based on the macro-interlocking structure type 3, the mix proportion of asphalt mixture is adjusted, the fine aggregate content is increased by 5%, and a warm mix agent is added; and a screed equipped with high-frequency vibration function is used to pave the surface layer 2 material, with the vibration frequency set to 55Hz, and forced vibration is applied to deep and narrow grooves to ensure dense filling.

[0094] S6) Heavy rollers are used to compact the interface area five times at a speed of 2 km / h in the strip area where the macro interlocking structure 3 is located.

[0095] S7) The compactness of the groove filling is detected by 2GHz high-frequency ground penetrating radar (GPR), and the geometric dimensions are verified by handheld 3D laser scanner. When the GPR detection shows no significant defects and the dimensional deviation is ≤±0.4mm, the construction quality is deemed qualified.

[0096] The embodiments and descriptions above are merely illustrative of the principles and preferred embodiments of the present invention. Various changes and modifications may be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A three-dimensional interlocking interface structure system for airport pavement, comprising a base layer (1) and a surface layer (2), characterized in that: An array-type macroscopic interlocking structure (3) is provided on the base layer (1); a microscopic interlocking structure is also provided on the inner surface of the macroscopic interlocking structure (3); a transition layer is also provided on the microscopic interlocking structure; the surface layer (2) is filled on the surface of the base layer (1) which has the macroscopic interlocking structure (3), the microscopic interlocking structure, and the transition layer. The macroscopic interlocking structure (3) is an array of trapezoidal grooves set on the base layer (1), and the microscopic interlocking structure is a micron-level surface texture structure obtained by sandblasting on the inner surface of the array of trapezoidal grooves. The surface roughness Ra of the micron-level surface texture structure is 2μm-12μm.

2. The three-dimensional interlocking interface structure system for airport pavement according to claim 1, characterized in that: The trapezoidal grooves are arranged in a regular array on the surface of the base layer (1), and the array layout is divided into parallel stripe structure or grid pattern structure.

3. The three-dimensional interlocking interface structure system for airport pavement according to claim 2, characterized in that: The trapezoidal groove is divided into standard type and enhanced type.

4. The three-dimensional interlocking interface structure system for airport pavement according to claim 3, characterized in that: The standard trapezoidal groove has a sidewall inclination angle of 30°-45°, and the bottom of the trapezoidal groove and all inner corners are rounded, with a radius of ≥ 2mm. The standard trapezoidal groove has an upper opening width of 15-25mm and a lower opening width of 10-18mm, with the upper opening width being greater than the lower opening width, and the depth of the trapezoidal groove being 3-6mm.

5. The three-dimensional interlocking interface structure system for airport pavement according to claim 3, characterized in that: The sidewall inclination angle of the enhanced trapezoidal groove is 20°-30°, and the bottom of the trapezoidal groove and all inner corners are rounded, with the radius of the rounded arc being ≥ 2mm. The width of the upper opening of the enhanced trapezoidal groove is 10-18mm; the width of the lower opening is 5-12mm, and the width of the upper opening is greater than the width of the lower opening, and the depth of the trapezoidal groove is 6-10mm.

6. The three-dimensional interlocking interface structure system for airport pavement according to claim 3, characterized in that: The center distance between two adjacent trapezoidal grooves is twice the length of the top opening of the trapezoidal groove.

7. The three-dimensional interlocking interface structure system for airport pavement according to claim 1, characterized in that: The transition layer is an SBS modified bitumen adhesive layer coated on a micron-scale surface textured structure, a prefabricated flexible microporous pad, or an elastic sealant poured into a trapezoidal groove with a micron-scale surface textured structure.

8. A method for forming a three-dimensional interlocking interface structure system for airport pavement, characterized in that, Includes the following steps: S1) Based on the material properties of the base layer (1) and surface layer (2), traffic load level and environmental conditions, establish a parameter optimization finite element model; optimize and determine the type, geometric parameters, array arrangement mode and rounded chamfer size of the macroscopic interlocking structure (3); S2), based on the type, geometric parameters, array arrangement mode and chamfer size of the macro interlocking structure (3), a CNC milling machine is used with a chamfer forming cutter head to precisely cut a trapezoidal groove array on the surface of the base layer (1); S3) Select a suitable abrasive and use an automatic sandblasting machine to perform full-coverage sandblasting on the inner surface of the trapezoidal groove array until the roughness Ra reaches the preset value to obtain a micron-level surface texture structure. S4) Uniformly coat the micron-scale surface texture structure after sandblasting with SBS modified bitumen or fill it with a flexible microporous pad or inject elastic sealant to form a transition layer. S5) Based on the macro-interlocking structure (3) type, the material ratio of the surface layer (2) is adjusted; and a screed equipped with high-frequency vibration function is used to spread the surface layer (2) material until the surface layer (2) material is densely filled to the bottom of the trapezoidal groove; S6) Overlap, slow, and multiple compaction of the strip area where the macro interlocking structure (3) is located, while monitoring the paving temperature, vibration parameters, and number of compaction passes in real time; S7) The compactness of the groove filling is detected by high-frequency ground-penetrating radar (GPR), and the geometric dimensions are verified by a handheld 3D laser scanner. When the GPR test shows no significant defects and the dimensional deviation is ≤ ±0.5mm, the construction quality is deemed qualified.

9. The method for forming a three-dimensional interlocking interface structure system for airport pavement according to claim 8, characterized in that: In step S1), the macroscopic interlocking structure (3) is a trapezoidal groove, which is of the standard type and the enhanced type; the array arrangement mode is a parallel stripe structure or a grid pattern structure; wherein, the parallel stripe structure is suitable for unidirectional main force structure; the grid pattern structure is suitable for multidirectional force structure.

10. A method for forming a three-dimensional interlocking interface structure system for airport pavement according to claim 9, characterized in that: In step S1), the sidewall inclination angle of the standard trapezoidal groove is 30°-45°, and the bottom of the trapezoidal groove and all inner corners are rounded, with the radius of the rounded arc being ≥ 2mm. The standard trapezoidal groove has an upper opening width of 15-25mm and a lower opening width of 10-18mm, with the upper opening width being greater than the lower opening width, and the trapezoidal groove depth being 3-6mm. The sidewall inclination angle of the enhanced trapezoidal groove is 20°-30°, and the bottom of the trapezoidal groove and all inner corners are rounded, with the radius of the rounded arc being ≥ 2mm. The width of the upper opening of the enhanced trapezoidal groove is 10-18mm; the width of the lower opening is 5-12mm, and the width of the upper opening is greater than the width of the lower opening, and the depth of the trapezoidal groove is 6-10mm.

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