Double-block type sleeper

Abstract

According to the double-block type sleeper, the height of a foundation platform is increased to 240 mm, the strength of the foundation platform is improved, local stress concentration is avoided, cracks and damage are reduced, and the service life of the sleeper is prolonged. The width of the blocking shoulder is increased to 180 mm, the strength of the rail bearing table is improved, the anti-roll capacity of the rail bearing table is enhanced, and stress concentration can be avoided through the round corner at the blocking shoulder. The stirrups at the two end areas of the foundation platform are denser, and the shear resistance is enhanced. The inclined connecting pieces are additionally arranged, the inclined connecting pieces and the main reinforcements are welded in a crossed mode, a space truss structure is formed, alternating stress is dispersed, and the shear resistance is enhanced. The latticed convex pattern structure at the bottom of the foundation platform enhances the binding force with a ballast bed through mechanical meshing. And the diversion trench is used for draining water, so that erosion of ballast bed accumulated water to the combined surface of the foundation platform and the ballast bed is reduced. The foundation platform is fixed to the ballast bed through embedded bolts, and the construction process is simplified.

Description

Technical Field

[0001] This utility model relates to fixed buildings, and more particularly to rail transit facilities, especially a double-block sleeper. Background Technology

[0002] With the increasing density of urban rail transit networks and the rise in train axle loads, traditional sleeper structures are gradually revealing several problems under long-term alternating loads. Existing sleepers, comprising a foundation platform, rail support, and shoulders, suffer from the following defects: insufficient strength of the foundation platform, easily inducing localized stress concentration, leading to cracks and damage, significantly affecting the overall lifespan of the sleeper; insufficient anti-tilting capacity of the rail support, easily causing lateral displacement; insufficient shear strength of the steel reinforcement cage in the foundation platform, prone to structural cracks under long-term loads; difficulty in forming an effective mechanical engagement between the bottom surface of the foundation platform and the track bed, easily leading to slippage when environmental humidity changes, and water accumulation, if not drained, easily causing erosion of the mating surface; and the cumbersome and time-consuming process of fixing the sleeper to the track bed via cast-in-place concrete, requiring steel reinforcement binding and concrete pouring. Utility Model Content

[0003] The purpose of this utility model is to provide a double-block sleeper to solve the technical problems in the prior art, such as insufficient strength of the foundation platform, insufficient anti-tilting capacity of the rail bearing platform, insufficient shear strength of the steel reinforcement cage, difficulty in forming an effective mechanical engagement between the bottom surface of the foundation platform and the track bed, and cumbersome procedures for fixing the sleeper to the track bed.

[0004] This utility model provides a double-block sleeper, including a base platform with a height of 240mm. A base is mounted on the base platform, and a rail support platform is mounted on the base. Shoulders are provided on both sides of the rail support platform, with the width direction of the shoulders parallel to the length direction of the base platform. The width of the shoulders is 180mm, and the outer edges of both shoulders are rounded. The upper surface of the rail support platform is provided with diamond-shaped anti-slip textures. The base platform includes a steel reinforcement cage, which includes main bars and stirrups. The main bars extend along the length direction of the base platform and extend along the width direction of the base platform. The cross-section is matrix-distributed, with stirrups parallel to the height of the foundation platform and spaced apart along its length. The stirrups are welded and fixed to the main reinforcement bars. The density of the stirrups at both ends of the foundation platform is greater than that in the middle. Diagonally adjacent main reinforcement bars are welded and fixed with oblique connectors, which are spaced apart along the length of the main reinforcement bars. The lower surface of the foundation platform has a grid-like textured structure and a flow channel in the lower surface. The flow channel runs through the foundation platform along its length. Pre-embedded bolts are installed at the bottom of the foundation platform.

[0005] Furthermore, the stirrups in the middle of the foundation platform are spaced 150mm apart, and the stirrups at both ends of the foundation platform are spaced 80mm apart within 200mm of the ends.

[0006] Furthermore, the spacing between the oblique connectors is 300mm.

[0007] Furthermore, the mesh-like embossed structure includes spaced-apart protrusions, with a height of 5mm and a spacing of 50mm between the protrusions.

[0008] Furthermore, the depth of the guide groove is 10mm and the width is 20mm.

[0009] Compared with existing technologies, this invention offers positive and significant advantages. It increases the height of the foundation platform to 240mm, improving its strength, preventing localized stress concentration, reducing cracks and damage, and extending sleeper life. The shoulder width is increased to 180mm, enhancing the strength of the rail support platform and its resistance to lateral tilting; the rounded corners at the shoulder prevent stress concentration. The diamond-shaped anti-slip texture on the upper surface of the rail support platform increases friction between the rail and the platform, reducing the possibility of longitudinal rail creep. The stirrups at both ends of the foundation platform are more densely packed, enhancing shear resistance. Diagonal connectors are added, cross-welded to the main reinforcement, forming a spatial truss structure to disperse alternating stress and further enhance shear resistance. The grid-like textured structure at the bottom of the foundation platform strengthens the bond with the track bed through mechanical interlocking. Drainage channels reduce water accumulation on the track bed and its erosion of the interface between the foundation platform and the track bed. The foundation platform is fixed to the track bed with pre-embedded bolts, simplifying the construction process, reducing construction steps, and enabling rapid installation. Attached Figure Description

[0010] Figure 1 This is a front view schematic diagram of a double-block sleeper according to the present invention.

[0011] Figure 2 This is a side view of a double-block sleeper according to the present invention.

[0012] Figure 3 This is a top view schematic diagram of a double-block sleeper according to the present invention.

[0013] Figure 4 This is a bottom view schematic diagram of a double-block sleeper according to the present invention. Detailed Implementation

[0014] The present invention will be further described below with reference to embodiments, but the present invention is not limited to these embodiments. Any similar variations using the present invention should be included within the protection scope of the present invention. The use of directions such as up, down, front, back, left, right, center, inside, and outside in the present invention is only for the convenience of clear description and is not intended to limit the technical solution of the present invention.

[0015] like Figures 1-4As shown, this utility model provides a double-block sleeper, including a base platform 1 with a height of 240mm. A base 2 is mounted on the base platform 1, and a rail support platform 3 is mounted on the base 2. Shoulders 4 are provided on both sides of the rail support platform 3, with the width direction of the shoulders 4 parallel to the length direction of the base platform 1. The width of the shoulders 4 is 180mm, and rounded corners 5 are provided on the outer sides of both shoulders 4. A diamond-shaped anti-slip texture 6 is provided on the upper surface of the rail support platform 3. The base platform 1 includes a steel reinforcement skeleton, which includes main bars 7 and stirrups 8. The main bars 7 extend along the length direction of the base platform 1, and the main bars 7 extend along the width direction of the base platform 1. The cross-section is matrix-distributed, with stirrups 8 parallel to the height direction of the foundation platform 1 and spaced apart along the length direction of the foundation platform 1. The stirrups 8 are welded and fixed to the main reinforcement 7. The density of the stirrups 8 at both ends of the foundation platform 1 is greater than that of the stirrups 8 in the middle of the foundation platform 1. Diagonally adjacent main reinforcement 7 are welded and fixed with oblique connectors 9. The oblique connectors 9 are spaced apart along the length direction of the main reinforcement 7. The lower surface of the foundation platform 1 is provided with a grid-like textured structure 10. A flow guide trough 11 is provided in the lower surface of the foundation platform 1. The flow guide trough 11 penetrates the foundation platform 1 along the length direction of the foundation platform 1. The bottom of the foundation platform 1 is provided with pre-embedded bolts 12.

[0016] Furthermore, the stirrups 8 in the middle of the foundation platform 1 are spaced 150mm apart, and the stirrups 8 at both ends of the foundation platform 1 within a range of 200mm from the end are spaced 80mm apart.

[0017] Furthermore, the spacing of the oblique connectors 9 is 300mm.

[0018] Furthermore, the mesh-like embossed structure 10 includes spaced-apart protrusions with a height of 5mm and a spacing of 50mm.

[0019] Furthermore, the depth of the guide groove 11 is 10mm and the width is 20mm.

[0020] Specifically, the foundation platform 1 is made of poured concrete, and the steel reinforcement cage is set inside it.

[0021] The working principle of this utility model:

[0022] This utility model increases the height of the foundation platform 1 to 240mm, improves the strength of the foundation platform 1, avoids local stress concentration, reduces the occurrence of cracks and damage, and improves the service life of the sleepers.

[0023] The shoulder 4 is widened to 180mm, which improves the strength of the rail support platform 3 and enhances its resistance to tilting. The rounded corner 5 at the shoulder 4 can avoid stress concentration.

[0024] The diamond-shaped anti-slip texture 6 on the upper surface of the rail support platform 3 increases the friction between the rail and the rail support platform 3, reducing the possibility of longitudinal rail creep.

[0025] The stirrups 8 at both ends of the foundation platform 1 are more densely packed to enhance shear resistance. Diagonal connectors 9 are added, which are cross-welded to the main reinforcement 7 to form a spatial truss structure to disperse alternating stress and further enhance shear resistance.

[0026] The grid-like textured structure 10 at the bottom of the base platform 1 enhances the bond between the base platform 1 and the track bed through mechanical interlocking. The drainage channel 11 is used for drainage, thereby reducing the erosion of the interface between the base platform 1 and the track bed by water accumulation in the track bed.

[0027] The basic platform 1 is fixed to the track bed by pre-embedded bolts 12, which simplifies the construction process, reduces construction steps, and enables rapid installation.

Claims

1. A double-block railway sleeper, characterized in that, The system includes a base platform with a height of 240mm, a base on which a rail support is mounted. Shoulders, each 180mm wide and parallel to the length of the base platform, are provided on both sides of the rail support. Rounded corners are provided on the outer edges of both shoulders. The upper surface of the rail support has a diamond-shaped anti-slip texture. The base platform also includes a steel reinforcement skeleton comprising main bars and stirrups. The main bars extend along the length of the base platform and are distributed in a matrix along the width of the platform. Stirrups are parallel to the height of the base platform and spaced along its length. The stirrups are welded to the main bars. The stirrup density at both ends of the base platform is greater than that in the middle. Diagonally adjacent main bars are welded together with diagonal connectors spaced along the length of the main bars. The lower surface of the base platform has a grid-like textured structure and a flow channel running through it along its length. Embedded bolts are located at the bottom of the base platform.

2. A double-block sleeper according to claim 1, characterized in that: The stirrups in the middle of the foundation platform are spaced 150mm apart, and the stirrups at both ends of the foundation platform are spaced 80mm apart within 200mm of the ends.

3. A double-block sleeper according to claim 1, characterized in that: The spacing between the oblique connectors is 300mm.

4. A double-block sleeper according to claim 1, characterized in that: The aforementioned mesh-like embossed structure includes spaced-apart protrusions, each with a height of 5mm and a spacing of 50mm.

5. A double-block sleeper according to claim 1, characterized in that: The depth of the flow channel is 10mm and the width is 20mm.

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