Ballastless track bed sleeper retaining shoulder crack repairing method and repairing tool

Abstract

The invention discloses a ballastless track bed sleeper retaining shoulder crack repairing method and tool, and the method comprises the steps: carrying out crack detection on a sleeper retaining shoulder of a railway ballastless track bed section, determining the crack condition, and cleaning the crack; the fasteners and the micro-platform steel rails in the sleeper shoulder crack area are removed; a repairing tool is installed in the sleeper shoulder crack area, and pressing and sealing are conducted; a repairing material is injected into the repairing tool in a pressurized mode, the temperature and pressure of the repairing material are monitored in real time, and the viscosity and seepage pressure of the repairing material are ensured; and after injection repairing is completed, the redundant repairing materials are discharged and recycled, the repairing tool is dismantled and cleaned, and the sleeper retaining shoulder crack area is recovered. The repairing tool comprises a mold body, a flexible sealing strip, a closed high-strength steel ring, a grouting opening and an exhaust opening. According to the method, the gap between the sleeper and the ballast bed can be efficiently and accurately repaired, meanwhile, it is ensured that repairing materials are fully utilized, and the repairing quality and efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ballastless track bed sleeper repair, and in particular to a ballastless track bed sleeper shoulder crack repair method and repair tooling. Background Art

[0002] Ballastless track sleepers can develop cracks in the shoulder area over long-term operation due to various factors. These cracks not only affect the structural integrity of the sleepers but can also further impact the stability and safety of the railway line. Traditional repair methods often suffer from low efficiency, poor quality assurance, and material waste. Therefore, the development of an efficient, precise, and environmentally friendly repair method and tooling is crucial.

[0003] In the prior art, the repair of sleeper cracks mainly adopts the following three methods:

[0004] (1) First, use a wrench to loosen and remove the fastener system of the sleeper to be repaired, then use a hydraulic track lifter to lift the rails, so that a high working surface is formed between the sleeper base and the rail bottom plate, remove the pad on the sleeper base, chisel or roughen the damaged part of the base, clean the crushed or loose concrete, and then use a wire brush to remove the dust and oil on the surface. This repair of concrete sleeper damage, whether the damage is a minor surface crack or more serious internal structural damage, is carried out according to a series of processes such as loosening fasteners, lifting rails, and cleaning. There may be a situation where the repair process for minor damage is slightly cumbersome, while for serious damage it is not comprehensive and in-depth enough. Although the operation of lifting rails and removing pads with a hydraulic track lifter is conducive to the expansion of subsequent repair space, the whole process is relatively time-consuming and labor-intensive. In an emergency situation where repairs need to be completed quickly and railway operations need to be restored, such a process may make the repair time too long, affecting the normal use of the railway.

[0005] (2) Clean the repair area of the shoulder guard; drill a hole vertically on the repair area, then implant the threaded steel bar into the hole and fix it; and repair the repair area with the repair material. The drilling device used in the repair method includes a base, a scale rod, a limit ring, a brake rod and a drilling mechanism; the drill bit is set on the drilling machine; the base is fixed on the shoulder guard; the scale rod is fixed on the base and is arranged vertically with the base; a plurality of scale grooves are set on the scale rod; one end of the limit ring is fixedly connected to the drilling machine, and the other end thereof is stuck in the scale groove, and the limit ring can move between two adjacent scale grooves; the brake rod is set on the limit ring.

[0006] (3) A pair of opposed baffle frames and position limiting teeth fixedly connected to the top surface of the baffle frames; the baffle frames are provided with a cavity inside, the cavity semi-enclosing the rail shoulder; the position limiting teeth are symmetrically distributed on both sides of the baffle frames, and the position limiting plates are movably connected to the position limiting teeth. Alternatively, a mold and a positioning member are used, the mold has a cavity, the inner edge contour of the cavity coincides with the standard outer contour of the shoulder; the positioning member is connected to the mold, the positioning member is provided with a positioning hole; the positioning hole is used to position the positioning member; the mold or the positioning member is provided with an opening, the opening communicating with the cavity. It mainly focuses on structural design to achieve functions such as positioning and enclosing the shoulder, but does not give sufficient consideration to the sealing performance when injecting the repair material. For example, in the actual repair process, if there is a gap between the mold and the shoulder, it is easy for the repair material to leak, which not only wastes material, but may also affect the repair effect and damage the appearance and internal structural integrity of the repair area. The material used for the mold and its key indicators such as strength and durability are not clearly stated. During frequent railway repair work, molds must withstand the pressure of repeated installation and disassembly, as well as the pressure of injecting repair materials. If they lack strength or durability, they are prone to deformation and damage, which in turn affects the precision and quality of the repair and increases mold replacement costs. Furthermore, mold design often focuses solely on its ability to surround and position the shoulder, without fully considering how to coordinate with the preceding damage detection and cleaning steps, and the subsequent injection and curing of repair materials. For example, after cleaning the damaged area, can the mold be easily installed without damaging the cleaned surface? During the injection of the repair material, does the mold structure facilitate even material distribution? These issues lack comprehensive collaborative design. Summary of the Invention

[0007] In view of this, the purpose of the embodiments of the present invention is to provide a method and repair tool for repairing cracks in the shoulder of a ballastless track sleeper, which can efficiently and accurately repair the gap between the sleeper and the track bed, while ensuring the full utilization of the repair materials and improving the repair quality and efficiency.

[0008] In a first aspect, an embodiment of the present invention provides a method for repairing cracks in a ballastless track sleeper shoulder, comprising:

[0009] S100, crack detection on the rail sleeper shoulder of the ballastless track section of the railway, determine the crack condition and clean the cracks.

[0010] S200, remove the fasteners and micro-rails in the cracked area of the sleeper shoulder.

[0011] S300: Installing repair tooling in the cracked area of the sleeper shoulder and performing compaction and sealing.

[0012] S400 , injecting a repair material into the repair tool under pressure, monitoring the temperature and pressure of the repair material in real time, and ensuring the viscosity and penetration pressure of the repair material.

[0013] S500, after the injection repair is completed, the excess repair material is discharged and recycled, the repair tooling is removed and cleaned, and the crack area of the sleeper shoulder is restored.

[0014] In combination with the first aspect, an embodiment of the present invention provides a first possible implementation of the first aspect, wherein, in S100, detecting cracks on the sleeper shoulder of the ballastless track section of the railway, determining the crack condition, and cleaning the cracks includes:

[0015] S110, preliminary inspection revealed multiple cracks in the rail sleeper shoulders of the ballastless track section of the railway.

[0016] S120: For the section to be repaired, use non-destructive testing equipment to test the sleeper shoulder to determine the specific location, length and depth of the crack.

[0017] For S130, clean the cracked area using a high-pressure water gun and a wire brush to remove impurities and loose material.

[0018] In combination with the first aspect, an embodiment of the present invention provides a second possible implementation of the first aspect, wherein in S200, removing the fasteners and micro-rails in the cracked area of the sleeper shoulder includes:

[0019] S210, remove the fasteners of the shoulder to be repaired in the cracked area of the sleeper shoulder.

[0020] S220, remove the corresponding micro-platform rails.

[0021] S230, marking and placing the fasteners and the corresponding micro-platform rails.

[0022] In combination with the first aspect, an embodiment of the present invention provides a third possible implementation of the first aspect, wherein in S300, installing a repair tool in the cracked area of the sleeper shoulder and performing compaction and sealing includes:

[0023] S310, tightly fitting the bottom of the repair tool to the cracked area of the sleeper shoulder.

[0024] S320, using a reaction device, using rails or fastener bolts to press the repair tooling to form a closed space.

[0025] In combination with the first aspect, an embodiment of the present invention provides a fourth possible implementation of the first aspect, wherein in S400, the pressurized injection of the repair material into the repair tool and the real-time monitoring of the temperature and pressure of the repair material to ensure the viscosity and penetration pressure of the repair material include:

[0026] S410, preheating the repair material to 45-65°C, and maintaining the osmotic pressure of the repair material.

[0027] S420, pressurizing the repair material into the repair tooling through grouting equipment, the grouting pressure is 0.2-0.5 MPa, the exhaust valve is closed when slurry flows out of the exhaust hole, and pressurized grouting is continued, and grouting is stopped when the pressure reaches 0.5 MPa.

[0028] S430, during the injection process, the on-site temperature and the temperature of the repair material are monitored in real time. If the temperature of the repair material is lower than 45°C, heating means are used to continue heating to the required temperature. If the instantaneous temperature of the repair material in the repair tool is lower than 45°C, the repair tool is heated to maintain the viscosity of the repair material.

[0029] In combination with the first aspect, the embodiment of the present invention provides a fifth possible implementation of the first aspect, wherein S400 further includes:

[0030] S440, if the pressure in the mold is still not less than 0.2MPa within 1h to 1.5h after grouting, the pressure is maintained to maintain the penetration and strengthening effect of the repair material on the surface and cracks of the sleeper shoulder, and then the grouting port is opened to recover the excess repair material.

[0031] S450, if the pressure in the mold is still less than 0.2MPa within 1h to 1.5h after grouting, continue pressurizing grouting until the pressure is not less than 0.2MPa within 1h to 1.5h after grouting and after grouting stops, then continue to maintain the pressure to maintain the penetration and strengthening effect of the repair material on the surface and cracks of the sleeper shoulder, then open the grouting port and recover the excess repair material.

[0032] In combination with the first aspect, an embodiment of the present invention provides a sixth possible implementation of the first aspect, wherein, in S400, the repair material is a polymer material, the viscosity of the polymer material does not exceed 5 mPa·s, and the viscosity does not exceed 10 mPa·s within 2 hours after grouting.

[0033] In combination with the first aspect, the embodiment of the present invention provides a seventh possible implementation of the first aspect, wherein in S500, after the injection repair is completed, the excess repair material is discharged and recovered, the repair tool is removed and cleaned, and the restoration of the sleeper shoulder crack area includes:

[0034] S510, after the grouting repair material is recovered, the excess repair material is discharged and recovered.

[0035] S520, removing the pressing device and the repair tool in sequence.

[0036] S530, grinding the edge banding material, installing fasteners, and restoring the railway line corresponding to the cracked area of the sleeper shoulder.

[0037] In a second aspect, an embodiment of the present invention further provides a ballastless track sleeper shoulder crack repair tool, which includes a mold body, a flexible sealing strip, a closed high-strength steel ring, a grouting port and an exhaust port.

[0038] The mold body is installed on the sleeper shoulder, and the bottom is tightly fitted with the shoulder crack area through the flexible sealing strip.

[0039] The grouting port is provided on the bottom side of the mold body, and the repair material is injected into the grouting port.

[0040] The exhaust port is provided on the top side of the mold body.

[0041] The outer edge of the mold body is fixed by the closed high-strength steel ring, and the space between the mold body and the closed high-strength steel ring is filled with a thick, fast-hardening, high-strength material.

[0042] In combination with the second aspect, an embodiment of the present invention provides a first possible implementation of the second aspect, which further includes a temperature measuring element, a temperature-controllable heating element and a pressure testing element.

[0043] The temperature measuring element detects the temperature inside the mold body in real time.

[0044] The temperature-controllable heating element controls the temperature within the mold body.

[0045] The pressure testing element detects the pressure inside the mold body in real time.

[0046] The beneficial effects of the embodiments of the present invention are:

[0047] This method offers highly efficient and precise crack repair. It uses nondestructive testing equipment to locate the crack's location, length, and depth, combined with high-pressure water guns and wire brushes for cleaning. This prevents secondary damage to the sleeper while ensuring the interior of the crack is clean, paving the way for subsequent penetration of repair materials. By monitoring the temperature and grouting pressure of the repair material in real time and adjusting the material's viscosity using a temperature-controlled heating element, the polymer material is ensured to fully penetrate the finest cracks, enhancing the depth and density of the repair.

[0048] This invention improves structural strength and durability. The mold body is compressed by a reaction force device, and the flexible sealing strip at the bottom and the closed high-strength steel ring form a sealed space to prevent the spillage of the repair material. At the same time, continuous pressure is applied to enhance the material's penetration and reinforcement effect on the cracks. The low-viscosity polymer material slowly increases in viscosity within two hours after grouting, ensuring fluidity while preventing premature curing. This significantly improves the bond strength and fatigue resistance of the repair layer to the sleeper.

[0049] This invention is easy to operate and improves construction efficiency. The mold body integrates grouting ports, exhaust ports, and a quick-hardening, high-strength material filling structure, simplifying the installation process. After the fasteners and rails are removed, they are marked and placed to avoid resetting errors and shorten the construction period. After the grouting is completed, excess repair materials can be recycled to reduce waste. The repair tooling is reusable, reducing overall costs.

[0050] This invention is safe, reliable, and highly adaptable. Built-in temperature measuring elements, temperature-controlled heating elements, and pressure testing components ensure the material maintains optimal permeability even in low-temperature environments, adapting to diverse climate conditions. Dynamically adjust the grouting hold time based on pressure decay to avoid under- or over-grouting, ensuring uniformity and long-term stability of the repair layer.

[0051] This invention offers excellent economic and environmental benefits, using local repair instead of complete replacement to reduce material consumption. The repair tooling is simple in structure, low in manufacturing cost, and requires no large-scale equipment. High-pressure water jet cleaning reduces dust pollution, and the repair materials are recyclable, meeting the requirements of sustainable development.

[0052] This invention contributes to the safety of railway operations. After the repair is complete, fasteners are promptly installed and edge banding materials are polished to ensure a smooth railroad shoulder area, thus preventing any impact on train operation stability. Through surface penetration reinforcement, crack propagation is delayed, the frequency of subsequent maintenance is reduced, and the overall service life of the ballastless track bed is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0054] Figure 1 This is a flow chart of a method for repairing cracks in a ballastless track sleeper shoulder according to the present invention;

[0055] Figure 2 Schematic diagram of the installation structure of the ballastless track bed sleeper shoulder crack repair tool of the present invention;

[0056] Figure 3The figure is a schematic diagram of the grouting structure of the ballastless track bed sleeper shoulder crack repair tool of the present invention.

[0057] In the figure: 1-rail; 2-sleeper; 3-track bed plate; 4-crack; 5-mold body; 6-grouting equipment; 7-repair material; 8-grouting port; 9-exhaust port. DETAILED DESCRIPTION

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0059] Please refer to Figures 1 to 3 The first embodiment of the present invention provides a method for repairing cracks in the shoulder of a ballastless track bed sleeper, which includes: S100, performing crack detection on the shoulder of the sleeper of the ballastless track bed section of the railway, determining the crack condition and cleaning the crack; S200, removing the fasteners and micro-rails in the crack area of the shoulder of the sleeper; S300, installing a repair tool in the crack area of the shoulder of the sleeper and pressing and sealing it; S400, pressurizing and injecting a repair material 7 into the repair tool, monitoring the temperature and pressure of the repair material 7 in real time to ensure the viscosity and penetration pressure of the repair material 7; S500, after the injection repair is completed, discharging and recycling the excess repair material 7, removing the repair tool and cleaning it, and restoring the crack area of the shoulder of the sleeper.

[0060] Among them, in S100, the crack detection of the sleeper shoulder of the ballastless track section of the railway, determining the crack condition and cleaning the cracks includes: S110, preliminary detection, finding that there are multiple cracks in the sleeper shoulder of the ballastless track section of the railway; S120, for the section to be repaired, using non-destructive testing equipment to detect the sleeper shoulder to determine the specific location, length and depth of the cracks; S130, using a high-pressure water gun and a wire brush to clean the crack area to remove impurities and loose materials.

[0061] Among them, in S200, the removal of the fasteners and micro-platform rails in the crack area of the sleeper shoulder includes: S210, removing the fasteners of the shoulder to be repaired in the crack area of the sleeper shoulder; S220, removing the corresponding micro-platform rails; S230, marking and placing the fasteners and the corresponding micro-platform rails.

[0062] Among them, in S300, the installation of repair tooling in the crack area of the sleeper shoulder and the pressing and sealing include: S310, tightly fitting the bottom of the repair tooling to the crack area of the sleeper shoulder; S320, using a reaction device, using a rail or fastener bolts to press the repair tooling to form a closed space to prevent the repair material 7 from overflowing during grouting and pressurization.

[0063] Among them, in S400, the repair material 7 is pressurized and injected into the repair tooling, and the temperature and pressure of the repair material 7 are monitored in real time to ensure the viscosity and penetration pressure of the repair material 7, including: S410, preheating the repair material 7 to 45-65°C to maintain the penetration pressure of the repair material 7; S420, pressurizing the repair material 7 into the repair tooling through the grouting equipment 6, the grouting pressure is 0.2-0.5MPa, and when slurry flows out of the exhaust hole, the exhaust valve is closed, and pressurized grouting is continued. When the pressure reaches 0.5Mpa, the grouting is stopped; S430, during the injection process, the on-site temperature and the temperature of the repair material 7 are monitored in real time. If the temperature of the repair material 7 is lower than 45°C, heating means are used to continue heating to the required temperature. If the instantaneous temperature of the repair material 7 in the repair tooling is lower than 45°C, the repair tooling is heated to maintain the viscosity of the repair material 7.

[0064] Among them, S400 also includes: S440, if the pressure in the mold is still not less than 0.2MPa within 1h to 1.5h after grouting, the pressure is maintained continuously to maintain the penetration and strengthening effect of the repair material 7 on the surface and cracks of the sleeper shoulder, and then the grouting port 8 is opened to recover the excess repair material 7; S450, if the pressure in the mold is still less than 0.2MPa within 1h to 1.5h after grouting, the pressurized grouting is continued until the pressure is not less than 0.2MPa within 1h to 1.5h after grouting and after the grouting stops, the pressure is maintained continuously to maintain the penetration and strengthening effect of the repair material 7 on the surface and cracks of the sleeper shoulder, and then the grouting port 8 is opened to recover the excess repair material 7.

[0065] Wherein, in S400, the repair material 7 is made of a polymer material, the viscosity of the polymer material does not exceed 5 mPa·s, and the viscosity does not exceed 10 mPa·s within 2 hours after grouting.

[0066] Among them, in S500, after the injection repair is completed, the excess repair material 7 is discharged and recovered, the repair tooling is removed and cleaned, and the restoration of the sleeper shoulder crack area includes: S510, after the grouting repair material 7 is recovered, the excess repair material 7 is discharged and recovered; S520, the clamping device and the repair tooling are removed in turn; S530, the edge sealing material is polished, the fasteners are installed, and the railway line corresponding to the sleeper shoulder crack area is restored.

[0067] Please refer to Figure 2 and Figure 3 In the figure, the sleeper 2 is installed on the track bed plate 3, the rail 1 is installed on the sleeper 2, and the mold body 5 is installed on the side of the sleeper 2 where the crack 4 appears. The second embodiment of the present invention provides a ballastless track sleeper shoulder crack repair tool, which includes a mold body 5, a flexible sealing strip, a closed high-strength steel ring, a grouting port 8 and an exhaust port 9; the mold body 5 is installed on the sleeper shoulder, and the bottom is tightly fitted with the shoulder crack area through the flexible sealing strip; the grouting port 8 is opened on the bottom side of the mold body 5, and the grouting port 8 is used to inject the repair material 7; the exhaust port 9 is opened on the top side of the mold body 5; the outer edge of the mold body 5 is fixed by the closed high-strength steel ring, and the space between the mold body 5 and the closed high-strength steel ring is filled with a viscous fast-hardening high-strength material.

[0068] Among them, it also includes a temperature measuring element, a temperature-controllable heating element and a pressure testing element; the temperature measuring element detects the temperature inside the mold body 5 in real time; the temperature-controllable heating element controls the temperature inside the mold body 5; the pressure testing element detects the pressure inside the mold body 5 in real time.

[0069] It should be understood that the above-described specific embodiments of the present invention are merely illustrative or illustrative of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the scope of protection of the present invention. In addition, the appended claims are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A method for repairing cracks in the shoulder of a ballastless track sleeper, characterized in that: include: S100, performs crack detection on the railroad sleeper shoulder of the ballastless track section, determines the crack condition and cleans the cracks; S200, remove the fasteners and micro-rails in the cracked area of the sleeper shoulder; S300, installing a repair tool in the cracked area of the sleeper shoulder and performing compaction and sealing; S400, injecting a repair material (7) into the repair tool under pressure, monitoring the temperature and pressure of the repair material (7) in real time, and ensuring the viscosity and penetration pressure of the repair material (7); S500, after the injection repair is completed, the excess repair material (7) is discharged and recycled, the repair tooling is removed and cleaned, and the crack area of the sleeper shoulder is restored.

2. The method for repairing cracks in the shoulder of a ballastless track sleeper according to claim 1, characterized in that: In S100, the crack detection on the rail sleeper shoulder of the ballastless track section, determining the crack condition and cleaning the crack includes: S110, preliminary inspections revealed multiple cracks in the railroad sleeper shoulders of the ballastless track section; S120, for the section to be repaired, using non-destructive testing equipment to test the sleeper shoulder to determine the specific location, length, and depth of the crack; For S130, clean the cracked area using a high-pressure water gun and a wire brush to remove impurities and loose material.

3. The method for repairing cracks in the shoulder of a ballastless track sleeper according to claim 1, characterized in that: In S200, removing the fasteners and micro-rails in the cracked area of the sleeper shoulder includes: S210, remove the fasteners of the shoulder to be repaired in the cracked area of the sleeper shoulder; S220, dismantle the corresponding micro platform rails; S230, marking and placing the fasteners and the corresponding micro-platform rails.

4. The method for repairing cracks in the shoulder of a ballastless track sleeper according to claim 1, characterized in that: In S300, the step of installing a repair tool in the cracked area of the sleeper shoulder and performing compaction and sealing includes: S310, tightly fitting the bottom of the repair tool to the cracked area of the sleeper shoulder; S320, using a reaction device, using rails or fastener bolts to press the repair tooling to form a closed space.

5. The method for repairing cracks in the shoulder of a ballastless track sleeper according to claim 1, characterized in that: In S400, the step of pressurizing and injecting the repair material (7) into the repair tool and monitoring the temperature and pressure of the repair material (7) in real time to ensure the viscosity and penetration pressure of the repair material (7) includes: S410, preheating the repair material (7) to 45-65°C, maintaining the osmotic pressure of the repair material (7); S420, pressurizing the repair material (7) into the repair tooling through the grouting equipment (6), the grouting pressure is 0.2-0.5 MPa, the exhaust valve is closed when slurry flows out of the exhaust hole, and the pressurized grouting is continued, and the grouting is stopped when the pressure reaches 0.5 MPa; S430, during the injection process, the on-site temperature and the temperature of the repair material (7) are monitored in real time. If the temperature of the repair material (7) is lower than 45°C, heating means are used to continue heating to the required temperature. If the instantaneous temperature of the repair material (7) in the repair tool is lower than 45°C, the repair tool is heated to maintain the viscosity of the repair material (7).

6. The method for repairing cracks in the shoulder of a ballastless track sleeper according to claim 5, characterized in that: S400 also includes: S440, if the pressure in the mold is still not less than 0.2 MPa within 1 hour to 1.5 hours after grouting, the pressure is maintained to maintain the penetration and strengthening effect of the repair material (7) on the surface layer and cracks of the sleeper shoulder, and then the grouting port (8) is opened to recover the excess repair material (7); S450, if the pressure in the mold is still less than 0.2MPa within 1h to 1.5h after grouting, continue pressurizing grouting until the pressure is not less than 0.2MPa within 1h to 1.5h after grouting and after grouting stops, then continue to maintain the pressure to maintain the penetration and strengthening effect of the repair material (7) on the surface layer and cracks of the sleeper shoulder, then open the grouting port (8) and recover the excess repair material (7).

7. The method for repairing cracks in the shoulder of a ballastless track sleeper according to claim 5, characterized in that: In S400, the repair material (7) is a polymer material, the viscosity of the polymer material does not exceed 5 mPa·s, and the viscosity does not exceed 10 mPa·s within 2 hours after grouting.

8. The method for repairing cracks in the shoulder of a ballastless track sleeper according to claim 1, characterized in that: In S500, after the injection repair is completed, the excess repair material (7) is discharged and recycled, the repair tool is removed and cleaned, and the restoration of the sleeper shoulder crack area includes: S510, after the grouting repair material (7) is recovered, the excess repair material (7) is discharged and recovered; S520, removing the pressing device and the repair tool in sequence; S530, grinding the edge banding material, installing fasteners, and restoring the railway line corresponding to the cracked area of the sleeper shoulder.

9. A ballastless track bed sleeper shoulder crack repair tool, characterized in that: It comprises a mold body (5), a flexible sealing strip, a closed high-strength steel ring, a grouting port (8) and an exhaust port (9); The mold body (5) is mounted on the rail sleeper shoulder, and the bottom thereof is tightly fitted to the shoulder shoulder crack area via the flexible sealing strip; The bottom side of the mold body (5) is provided with the grouting port (8), and the repair material (7) is injected into the grouting port (8); The exhaust port (9) is provided on the top side of the mold body (5); The outer edge of the mold body (5) is fixed by the closed high-strength steel ring, and the space between the mold body (5) and the closed high-strength steel ring is filled with a thick, fast-hardening, high-strength material.

10. The ballastless track sleeper shoulder crack repair tool according to claim 9, characterized in that: It also includes temperature measuring elements, temperature-controllable heating elements and pressure testing elements; The temperature measuring element detects the temperature inside the mold body (5) in real time; The temperature-controllable heating element controls the temperature inside the mold body (5); The pressure testing element detects the pressure inside the mold body (5) in real time.

Images