Sand prevention and edge protection structure of high-resilience rubber particle filled track bed

Abstract

The application discloses a high-resilience rubber particle filling type ballast bed sand prevention and edge protection structure and relates to the technical field of railway ballast tracks. The ballast bed sand prevention and edge protection structure comprises a railway subgrade, ballast aggregates, sleepers and rails. The bottom, side, top and internal gap of the ballast aggregates are filled with regenerated continuous-graded rubber particles of waste tires, the particle size of which is 0.5-20 mm and which is matched with the ballast grading. The two sides of the ballast are provided with an edge protection assembly which is composed of inserted feet and concrete precast blocks, and adjacent precast blocks are spliced into rigid fences through tenons and mortise grooves. The bottom rubber particle layer prevents water and salt, the side guides sand, the top seals sand, the internal rubber particles are disturbed to discharge sand particles under pressure and resilience, and self-cleaning is realized; the edge protection assembly restrains the ballast and prevents slumping. The application actively prevents wind sand from invading and prevents the ballast bed from being hardened, and is suitable for ballast tracks in windy and sandy saline areas.

Description

Technical Field

[0001] This invention relates to the field of railway ballast track technology, specifically to a high-resilience rubber granule-filled track bed sand-proof edge protection structure. Background Technology

[0002] Ballasted track is widely used in the construction of various railway lines due to its good elasticity, excellent drainage performance and convenient maintenance characteristics. As the core aggregate material of the track bed, ballast has the following main functions: bearing the upper load transmitted by the sleepers, providing uniform and stable track elasticity, effectively absorbing the impact vibration generated by wheel-rail operation, maintaining the track geometry, and ensuring the long-term stable operation of the line.

[0003] However, in windy and sandy areas, ballast tracks face unique challenges, as railway lines in these regions frequently suffer from wind-blown sand intrusion into the track bed. After sand particles are blown into the ballast pores by the wind, they gradually fill the gaps under the combined action of rainwater, salt, and dust, cementing with the ballast particles and forming track bed compaction. Once compacted, the track bed gradually loses its elasticity, and the track stiffness increases dramatically, resulting in a greater dynamic impact when trains pass, exacerbating damage to rails, sleepers, and fasteners, and in severe cases, endangering traffic safety. Furthermore, the drainage performance of compacted track beds is significantly reduced, further aggravating track soiling and mud pumping. Currently, prevention and control measures for track bed compaction mainly include regular cleaning and screening of the track bed, using high-quality ballast materials, and improving track bed cross-sectional design. However, these measures are all passive treatments and cannot fundamentally prevent wind-blown sand from entering the ballast pores. Some studies have attempted to solidify ballast particles by spraying ballast adhesive or to improve track elasticity using rubber-particle concrete sleepers. However, the former primarily prevents ballast from flying off, and the latter only alters the sleeper material properties; neither addresses the core problem of aeolian sand intrusion into the ballast pores leading to ballast compaction. Other technologies use crushed rubber particles laid at both ends of the sleepers to form a rubber strip layer, but its function is to provide elastic support, not to prevent sand intrusion. Therefore, a technical solution is urgently needed that can actively prevent aeolian sand from entering the ballast pores while maintaining track bed elasticity, thus preventing track bed compaction at its source. Summary of the Invention

[0004] The purpose of this invention is to provide a high-resilience rubber granule-filled track bed sand-proof edge protection structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-resilience rubber granule-filled track bed sand-proof edge protection structure, comprising a railway subgrade, rubber granules on the top of the railway subgrade, ballast aggregate on the top of the railway subgrade, sleepers inside the ballast aggregate, rails connected to the top of the sleepers, and edge protection components symmetrically arranged on both sides of the ballast aggregate.

[0006] Preferably, the edge protection component includes a plug, which is embedded inside the railway subgrade. The top of the plug is integrally cast with a precast concrete block. One end of the precast concrete block is integrally cast with a tenon, and the other end of the precast concrete block has a groove. The groove and the tenon match. The continuously graded rubber granules can perfectly match the gradation of the ballast aggregate, filling the gaps more densely. This can both compress the intrusion of wind and sand into the channel and ensure the overall elasticity of the track bed. Relying on the rebound characteristics of the rubber granules, it can buffer vibration, delay track bed hardening, and improve the stability of train operation.

[0007] Preferably, the rubber granules are recycled rubber granules obtained from waste tires after crushing and screening. Using recycled rubber granules from waste tires enables the recycling of waste resources, which is environmentally friendly and reduces engineering costs.

[0008] Preferably, the ballast aggregate is filled with rubber particles, which have a continuous gradation and a particle size range of 0.5-20mm. The gradation curve of the rubber particles matches the gradation curve of the ballast aggregate. The continuous gradation of the rubber particles can perfectly match the gradation of the ballast aggregate, and the filling gaps are more compact. This can both compress the wind and sand intrusion channels and ensure the overall elasticity of the track bed. Relying on the rebound characteristics of the rubber particles, it can buffer vibration, delay track bed hardening, and improve driving stability.

[0009] Preferably, rubber granules are laid on the bottom, sides, and top of the ballast aggregate. The thickness of the rubber granules at the bottom of the ballast aggregate is 2-3 cm, while the thickness of the rubber granules on the sides and top of the ballast aggregate is 3-5 cm. The 2-3 cm thick rubber granules at the bottom form a closed water and salt barrier, completely blocking the upward flow of groundwater carrying salt stains and preventing the ballast aggregate from bonding and hardening with the railway subgrade. This design does not change the original stress structure of the track bed and does not affect the bearing capacity of the railway subgrade. It takes into account both the salt barrier effect and the safety of the track bed structure. The 3-5 cm thick rubber granules on the sides form a flexible sand-guiding layer with a smooth surface and no dead corners. It can guide wind and sand to slide down smoothly and prevent accumulation and seepage into the track bed. The rubber granules do not hinder the deformation of the ballast aggregate under stress. At the same time, with the compressive rebound characteristics, they automatically fill the gaps and discharge fine sand, achieving self-cleaning and maintaining the sand guiding and blocking effect for a long time.

[0010] Preferably, the precast concrete blocks feature a sloping side design. The precast concrete blocks are made of C30 salt-resistant concrete, which enhances the corrosion resistance of the edge protection and is suitable for the harsh environment of saline soil areas. The integrally cast feet and precast concrete block structure have high strength and are not easy to break or fall off, ensuring the long-term stability of the edge protection and resisting train vibration and wind and sand impact.

[0011] Compared with the prior art, the beneficial effects of the present invention are: (1) The high-resilience rubber granule filled track bed sand-proof edge protection structure is equipped with edge protection components, which can not only fix the ballast aggregate and rubber granules and block the side wind and sand intrusion, but also, with the help of multiple layers of rubber granules, realize multiple functions of salt isolation, wind and sand guidance and ballast stabilization. It solves the problems of track bed hardening and ballast aggregate collapse in wind-sand and salt-affected areas from the source. The overall structure is stable, suitable for railway on-site construction and long-term operation and maintenance, and greatly improves the service life of track bed.

[0012] (2) The high-resilience rubber granule filled track bed sand protection structure uses recycled rubber granules from waste tires to realize the recycling of waste resources, which is environmentally friendly and reduces engineering costs. The continuous graded rubber granules can perfectly match the gradation of ballast aggregate, and the filling gaps are more compact. It can not only compress the wind and sand intrusion channel, but also ensure the overall elasticity of the track bed is uniform. Relying on the rebound characteristics of the granules, it can buffer vibration, delay track bed hardening, and improve driving stability.

[0013] (3) The high-resilience rubber particle filled track bed sand prevention and edge protection structure will produce slight volume expansion and contraction and gap disturbance each time the rubber particles are compressed and rebound. During the rebound process, the gap between the rubber particles will expand instantaneously, and at the same time, it will loosen the surface fine sand. With the train vibration and natural wind, the fine sand will automatically fall off and be discharged from the gap between the particles without manual cleaning, thus achieving "self-cleaning sand prevention".

[0014] This high-resilience rubber granule-filled track bed sand-proof and edge protection structure forms a closed water and salt barrier by laying a layer of rubber granules at the bottom of the ballast aggregate. This completely blocks the upward flow of groundwater carrying salt stains, and prevents the ballast aggregate from bonding and hardening with the roadbed filler. The thin-thickness design does not change the original stress structure of the track bed, does not affect the roadbed bearing capacity, and takes into account both the salt isolation effect and the safety of the track bed structure. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A magnified structural diagram at point A; Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the pin and tenon structure of the present invention; Figure 5 This is a schematic diagram of the precast concrete block structure of the present invention.

[0017] In the diagram: 1. Railway subgrade; 2. Rubber granules; 3. Ballast aggregate; 4. Sleeper; 5. Rail; 6. Edge protection assembly; 61. Insert; 62. Precast concrete block; 63. Tenon; 64. Mortise and tenon. Detailed Implementation

[0018] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] Please see Figure 1-5 This invention provides a high-resilience rubber granule-filled track bed sand-proof and edge-protecting structure, including a railway subgrade 1. Rubber granules 2 are placed on the top of the railway subgrade 1. The rubber granules 2 are recycled rubber granules obtained from crushed and screened waste tires. Using recycled rubber granules from waste tires achieves the recycling of waste resources, is environmentally friendly, and reduces engineering costs. Ballast aggregate 3 is placed on the top of the railway subgrade 1, and the interior of the ballast aggregate 3 is filled with rubber granules 2. The rubber granules 2 have a continuous gradation, with a particle size range of 0.5-20mm. The gradation curve of the rubber granules 2 matches the gradation curve of the ballast aggregate 3. The continuous gradation of the rubber granules 2 perfectly adapts to the gradation of the ballast aggregate 3, resulting in a denser filling gap. This not only compresses the wind and sand intrusion channels but also ensures the overall elasticity of the track bed is uniform. Relying on the resilience of the rubber granules 2, it buffers vibration, delays track bed hardening, and improves driving stability. Rubber granules 2 are also laid on the bottom, sides, and top of the ballast aggregate 3. The bottom layer of rubber granules 2 is 2-3cm thick, while the sides and top of the ballast aggregate 3 are 3-5cm thick, with a bottom layer of 2-3cm thick rubber granules 2 forming a sealed, water- and salt-proof barrier. This completely prevents underground capillary water from carrying salt up to the surface, avoiding adhesion and hardening between the ballast aggregate 3 and the railway subgrade 1. This design does not alter the original load-bearing structure of the track bed, does not affect the bearing capacity of the railway subgrade 1, and balances salt isolation with track bed structural safety. Rubber granules 2 with a thickness of 3-5cm are used to form a flexible sand-guiding layer with a smooth surface and no dead corners. This allows wind and sand to slide down smoothly and avoid accumulation and seepage into the track bed. The rubber granules 2 do not hinder the deformation of the ballast aggregate 3 under stress. At the same time, with the compressive rebound characteristics, they automatically fill gaps and discharge fine sand, achieving self-cleaning and maintaining the sand-guiding and sand-blocking effect for a long time. The ballast aggregate 3 is equipped with sleepers 4 inside, and the top of the sleepers 4 is connected to the rails 5. The two sides of the ballast aggregate 3 are symmetrically equipped with edge protection components 6.

[0020] The edge protection component 6 includes a pin 61, which is embedded inside the railway subgrade 1. The top of the pin 61 is integrally cast with a precast concrete block 62. One end of the precast concrete block 62 is integrally cast with a tenon 63, and the other end of the precast concrete block 62 is provided with a mortise 64. The mortise 64 and the tenon 63 match. The side precast concrete block 62, with its spliced ​​structure and bottom pin 61, forms a protective barrier, firmly fixing the inner ballast aggregate 3 and rubber granules 2, preventing the ballast aggregate 3 from collapsing and the edge protection from shifting due to train vibration, and blocking the direct intrusion of wind and sand into the passage. The side of the precast concrete block 62 is inclined. The precast concrete block 62 is made of C30 salt-resistant concrete. C30 salt-resistant concrete improves the corrosion resistance of the edge protection and is suitable for the harsh environment of saline soil areas. The integrally cast pin 61 and precast concrete block 62 have high structural strength and are not easy to break or fall off, ensuring the long-term stability of the edge protection and resisting train vibration and wind and sand impact.

[0021] In use, the precast concrete blocks 62 on the sides form a continuous and closed overall edge protection system through the splicing structure of the end tenons 63 and the concave tenons 64. With the help of the bottom integrally cast plugs 61, they are vertically embedded into the railway subgrade 1 to achieve reliable anchoring between the structure and the foundation. This rigid enclosure has high overall rigidity and good anti-overturning and anti-slip performance. Under the long-term action of high-frequency vibration of trains, longitudinal impact and lateral wind and sand, it can continuously restrain the inner ballast aggregate 3 and rubber particles 2, effectively suppress the loosening, collapse, outward extrusion and edge displacement of ballast aggregate 3. At the same time, it forms a dense barrier from the side, directly blocking the path of wind-blown sand to invade the track bed laterally. It builds a stable first line of sand prevention from the structural level, effectively improving the overall stability and long-term service capability of the track bed. Two layers of recycled rubber granules, 2-3 cm thick, are pre-laid at the bottom of the ballast aggregate 3 to form a continuous, closed, and flexible waterproof and salt-proof cushion layer. This cushion layer material has high density and good impermeability, which can effectively block the upward channels of underground capillary water and prevent salt from migrating into the roadbed with water. This avoids the cementation, hardening, and compaction of the ballast aggregate 3 and the roadbed filler under the action of salt crystallization and wet-dry cycles, fundamentally solving the problems of roadbed elasticity reduction, drainage deterioration, and uneven load-bearing in wind-blown sand and saline areas. This thin cushion layer does not change the original force transmission path of the roadbed, does not weaken the roadbed bearing capacity, and takes into account both salt-proof and seepage prevention functions and structural safety redundancy. It is highly adaptable to saline soil and arid wind-blown sand areas. The ballast aggregate 3 is internally filled with continuously graded rubber granules 2, with a particle size controlled between 0.5-20mm. The gradation curve matches that of the ballast aggregate 3, effectively filling the voids between the ballast aggregate 3, reducing porosity, compressing the space for wind and sand intrusion, and reducing sand deposition. The rubber granules 2 are made from crushed and screened waste tires, possessing high elasticity, high toughness, and good anti-aging properties. When a train passes, the rubber granules 2 are compressed and contracted, efficiently absorbing wheel-rail impact energy and attenuating vibration response. After the train leaves, they quickly rebound, maintaining the overall uniform elasticity distribution of the track bed, delaying the wear, pulverization, and compaction of the ballast aggregate 3, and improving ride smoothness. The expansion and contraction disturbance of the rubber granules 2 under repeated loads can loosen the sand accumulated in the pores. Combined with train vibration and natural wind, fine sand is automatically discharged, forming a long-term self-cleaning sand-blocking mechanism, significantly reducing the frequency of track bed cleaning and maintenance costs. The rebound deformation of the rubber granules 2 is sufficient to destroy the adhesion between sand particles and ballast. The two sides of the ballast aggregate 3 are trimmed into standard slopes, and the surface is evenly covered with rubber granules 2 with a thickness of 3-5cm, forming a continuous and smooth flexible sand-guiding slope. This slope has no sharp edges and is not easy to accumulate sand. It can guide the passing wind and sand to slide down the slope and prevent sand particles from accumulating and seeping into the track bed through the gaps. After the sleepers 4 are installed, 3-5cm rubber granules 2 are also laid on the top surface of the ballast aggregate 3 and the gaps between the sleepers 4 to achieve full coverage and sealing of the top surface of the track bed, blocking wind and sand from intruding from the top, and constructing a three-dimensional protection system of bottom salt isolation, side sand guidance and top sand sealing, which comprehensively improves the track bed's ability to resist sand intrusion.

[0022] The overall structure integrates multiple functions such as rigid enclosure constraint, flexible elastic buffer, material gradation for sand blocking and self-cleaning sand removal, achieving a synergistic unity of passive protection and active sand guiding, rigid fixation and flexible vibration reduction. Under the repeated action of train dynamic loads, the rubber granules 2 continuously play the roles of buffering, rebounding, disturbance, and sand removal, while the edge protection components provide stable lateral constraints. It systematically solves the problems of track bed compaction, collapse, and dirt in wind-blown sand and saline areas from the structural, material, and functional levels, effectively extending the service life of the track bed.

[0023] The construction and implementation steps are as follows: Step 1: Before construction, the top surface of railway subgrade 1 is thoroughly cleaned to remove loose soil, gravel, weeds, and other debris, ensuring a clean and tidy working surface free of obvious obstacles. Then, specialized leveling equipment is used to finely level the top surface of railway subgrade 1. Next, heavy compaction equipment is used to compact the surface in layers, strictly controlling the flatness and compaction of the top surface of railway subgrade 1 to meet design and specification requirements. This provides a solid and uniform foundation support for subsequent structural construction. After the acceptance of railway subgrade 1 is completed, the lines are accurately laid out and clearly marked according to the construction drawings and on-site benchmark control points. The installation position, direction, and elevation of the edge protection component 6 are clearly defined to ensure accurate installation and straight alignment of the edge protection component.

[0024] Step Two: The edge protection component 6 uses precast concrete blocks 62 produced in a factory according to standardized procedures. Before entering the site, the appearance quality, dimensional deviation, and strength indicators of the precast blocks must be strictly inspected. Only those that pass the inspection can be used. During installation, the precast concrete blocks 62 are hoisted and placed sequentially along the marked position. The end tenons 63 are precisely connected with the adjacent precast block grooves 64 to ensure tight splicing, uniform gaps, and no misalignment, forming a continuous and integral edge protection structure. After splicing, a special tamping tool is used to vertically and evenly press the inserts 61 at the bottom of the precast concrete blocks 62 into the railway subgrade 1 until the bottom surface of the precast block is completely attached to the top surface of the railway subgrade 1 without any gaps. This ensures that the edge protection component 6 is reliably, stably, and durablely anchored to the railway subgrade 1. The edge protection on both sides is installed symmetrically and with parallel lines.

[0025] Step 3: On the top surface of the railway subgrade 1 between the two side protection components 6, a layer of continuous graded recycled rubber granules 2 is evenly laid. The laying thickness is strictly controlled within the range of 2-3cm. During the laying process, manual leveling and local leveling are used to ensure that the rubber granule layer has a uniform thickness, a flat surface, and no obvious undulations or uneven thickness. After the laying is completed, a light compaction device is used to lightly compact the rubber granule layer to make its density moderate and its structure continuous, forming a closed and flexible salt and water barrier layer. This effectively blocks the upward path of underground capillary water, prevents salt from rising and eroding the track bed, and provides reliable anti-seepage and salt barrier protection for the main track bed.

[0026] Step 4: According to the design mix ratio, the ballast aggregate 3 and recycled rubber granules 2 are thoroughly mixed evenly in the material yard in advance to ensure that the two materials are evenly distributed and without segregation. After the mixture is transported to the construction site by transport vehicles, it is spread in layers on top of the bottom layer of rubber granules 2. The thickness of each layer is controlled within the allowable range of the specification. A paver is used in conjunction with manual trimming to ensure that the paved surface is flat and of uniform thickness. After paving, a vibratory compaction device is used to compact the layers, strictly controlling the density of the track bed to ensure that the overall strength and elasticity of the track bed are uniform. During the paving process, the edges on both sides of the ballast aggregate 3 are trimmed simultaneously to form a standard slope that meets the design requirements, creating conditions for the subsequent construction of the flexible sand guiding layer.

[0027] Step 5: After the standard slopes on both sides of the ballast aggregate 3 are trimmed, rubber granules 2 with a thickness of 3-5cm are evenly laid on the surface of the slope. The surface is then carefully leveled and lightly compacted by hand to form a continuous, smooth, and flexible sand-guiding slope, which effectively guides wind and sand to slide down and avoids accumulation. Subsequently, sleepers 4 are installed according to the design position, ensuring that the spacing, elevation, and alignment of sleepers 4 meet the specifications. After the sleepers 4 are installed in place, rubber granules 2 with a thickness of 3-5cm are evenly laid on the top surface of the ballast aggregate 3 and in the gaps between the sleepers 4 to completely seal the top surface of the track bed, blocking wind and sand from intruding from the top and forming a three-dimensional protection system of side sand guidance and top sand sealing, thereby improving the overall sand prevention capability of the track bed.

[0028] Step Six: After all structural construction is completed, a comprehensive cleanup of the construction site is carried out to thoroughly remove any remaining debris, dust, and sand from the outside of the edge protection components 6, the top surface of the track bed, and the surrounding area, maintaining a clean and orderly working environment. Subsequently, a comprehensive quality inspection is conducted, focusing on verifying key indicators such as the density of the joints of the precast concrete blocks 62, the thickness and density of each layer of rubber granules 2, the overall alignment and elevation of the track bed, and the installation accuracy of the sleepers 4, ensuring that all parameters meet the design and specification requirements. After acceptance, all construction procedures are completed, and the track bed structure is officially handed over for subsequent operation and use.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A high-resilience rubber granule-filled track bed sand-proof edge protection structure, comprising railway subgrade (1), characterized in that: The top of the railway subgrade (1) is provided with ballast aggregate (3), the inside of the ballast aggregate (3) is provided with sleepers (4), and the top of the sleepers (4) is connected to rails (5). The bottom, sides, top and internal gaps of the ballast aggregate (3) are all provided with recycled rubber particles (2) made from waste tires; The ballast aggregate (3) is symmetrically provided with edge protection components (6) on both sides. The edge protection components (6) include inserts (61) embedded in the railway subgrade (1) and precast concrete blocks (62) integrally formed on the top of the inserts (61). The adjacent precast concrete blocks (62) are spliced ​​together to form a continuous rigid enclosure for restraining the ballast aggregate (3) and the rubber particles (2).

2. The high-resilience rubber granule-filled track bed sand-proof edge protection structure according to claim 1, characterized in that: The rubber particles (2) have a continuous gradation with a particle size range of 0.5-20 mm, and the gradation curve of the rubber particles (2) matches the gradation curve of the ballast aggregate (3).

3. The high-resilience rubber granule-filled track bed sand-proof edge protection structure according to claim 1, characterized in that: The rubber particles (2) at the bottom of the ballast aggregate (3) are laid with a thickness of 2-3cm to form a water-proof and salt-proof layer; the rubber particles (2) on the sides and top of the ballast aggregate (3) are laid with a thickness of 3-5cm to form a flexible sand-guiding layer and a top sealing layer, respectively.

4. The high-resilience rubber granule-filled track bed sand-proof edge protection structure according to claim 1, characterized in that: One end of the precast concrete block (62) is integrally formed with a tenon (63), and the other end of the precast concrete block (62) is provided with a mortise and tenon groove (64) that matches the tenon (63). Adjacent precast concrete blocks (62) are spliced ​​together by the cooperation of the tenon (63) and the mortise and tenon groove (64).

5. The high-resilience rubber granule-filled track bed sand-proof edge protection structure according to claim 1, characterized in that: The side of the precast concrete block (62) is designed to be inclined, and the precast concrete block (62) is made of C30 salt-resistant concrete.

6. The high-resilience rubber granule-filled track bed sand-proof edge protection structure according to claim 1, characterized in that: The rubber granules (2) are recycled rubber granules obtained by crushing and screening waste tires.

7. The high-resilience rubber granule-filled track bed sand-proof edge protection structure according to claim 1, characterized in that: The rubber particles (2) filling the gaps inside the ballast aggregate (3) are used to rebound under pressure under train load to disturb and expel intruding sand particles.

8. The high-resilience rubber granule-filled track bed sand-proof edge protection structure according to claim 1, characterized in that: The insert (61) and the precast concrete block (62) are integrally cast and formed, and the insert (61) is vertically embedded inside the railway subgrade (1).

9. The high-resilience rubber granule-filled track bed sand-proof edge protection structure according to claim 3, characterized in that: The side of the ballast aggregate (3) is trimmed into a standard slope, and the flexible sand guiding layer is covered on the slope to form a smooth surface that guides the wind and sand to slide down.

10. The high-resilience rubber granule-filled track bed sand-proof edge protection structure according to claim 1, characterized in that: The ballast aggregate (3), the rubber granules (2), and the edge protection assembly (6) together constitute a three-dimensional protective system with bottom salt isolation, side sand guiding, top sand sealing, and internal sand blocking.

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