Concrete-filled steel tube sleeper capable of enhancing bonding performance and construction method

Abstract

The invention discloses a concrete filled steel tube sleeper capable of enhancing bonding performance and a construction method, and belongs to the technical field of ballastless tracks. The concrete filled steel tube sleeper comprises two sleeper blocks and at least one steel tube; first rough lines extending in the axial direction of the steel pipe are arranged on the peripheral wall of the steel pipe, one end of the steel pipe is inserted into one sleeper block, the other end of the steel pipe is inserted into the other sleeper block, and the two sleeper blocks and the interior of the steel pipe are integrally formed through concrete pouring. And the bottoms and the bottom surfaces of the side surfaces of the sleeper blocks are rough surfaces. According to the concrete-filled steel tube sleeper capable of enhancing the bonding performance, the connecting strength of the steel tube and the sleeper block can be improved, the connecting strength of a subsequent steel rail and the sleeper block and a ballast bed can be improved, and the problem that dislocation and even cracks occur at the joint of the steel tube and the ballast bed and the joint of the sleeper block and the ballast bed is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of ballastless tracks, and particularly relates to a concrete-filled steel tube sleeper with enhanced bonding performance and a construction method thereof. Background Art

[0002] In a railway ballastless track system, there is a precast sleeper. The sleeper is installed in the ballast bed or cast integrally with the ballast bed using concrete, used to install fasteners, further fix the rail above, and needs to maintain good connection performance with the ballast bed.

[0003] In the related art, a concrete-filled steel tube is used as a connecting component of the sleeper block for the precast sleeper. Compared with the general combined steel tube truss connection, the integrity is stronger, and the deformation of the concrete sleeper during storage, transportation, etc. can be effectively alleviated. At the same time, through the integral molding of the concrete-filled steel tube and the sleeper concrete block, that is, the formation of the concrete-filled steel tube is realized while pouring the sleeper concrete block, and the concrete-filled steel tube is designed to be composed of multiple hollow steel tubes, effectively increasing the geometric shape retention ability of the sleeper, reducing the steel tube consumption, improving the constructability, and can be directly constructed on site to meet the requirements of the sleeper's bending and torsion resistance.

[0004] However, the bonding ability formed between the steel tube and the sleeper block in the existing concrete-filled steel tube sleeper is effective, resulting in easy misalignment or even cracks at the joint. Summary of the Invention

[0005] Aiming at the above defects or improvement requirements of the prior art, the invention provides a concrete-filled steel tube sleeper with enhanced bonding performance and a construction method thereof, and the purpose is: not only can increase the connection strength between the steel tube and the sleeper block, but also can increase the connection strength between the subsequent rail and the sleeper block and the ballast bed, and avoid the problems of misalignment or even cracks at the joint between the steel tube and the sleeper block and the ballast bed.

[0006] To achieve the above purpose, in the first aspect, the invention provides a concrete-filled steel tube sleeper with enhanced bonding performance, and the concrete-filled steel tube sleeper includes two sleeper blocks and at least one steel tube;

[0007] A first rough texture extending along the axial direction of the steel tube is provided on the outer peripheral wall of the steel tube. One end of the steel tube is inserted into one of the sleeper blocks, and the other end of the steel tube is inserted into the other sleeper block. The two sleeper blocks and the inside of the steel tube are integrally formed by concrete pouring, and the side bottom and bottom surface of each sleeper block are rough surfaces.

[0008] Optionally, the concrete-filled steel tube sleeper further includes a plurality of rib plates. One side of each rib plate is fixed on the outer peripheral wall of the steel tube, and the other side of each rib plate is inserted into the corresponding sleeper block.

[0009] Optionally, the surface of each rib plate has a second rough texture, and the roughness of the second rough texture is greater than the roughness of the first rough texture and the roughness of the rough surface.

[0010] Optionally, the first rough texture is a spiral groove, and the spiral groove is processed by a thread rolling machine. The pitch of the spiral groove is 1.5 - 3 mm, and the depth is 0.1 - 0.3 m.

[0011] Optionally, the first rough texture is a reticulated groove, and the reticulated groove is cut by a cutting machine. The reticulation pitch of the reticulated groove is 2 - 3 mm, and the depth is 0.1 - 0.3 m.

[0012] Optionally, the steel pipe has a plurality of through holes arranged along the axial direction of the steel pipe. Each through hole is arranged along the radial direction of the steel pipe, and one end of each through hole facing away from the inner hole of the steel pipe is arranged upward.

[0013] Optionally, the rough surface is the surface formed by water washing after concrete pouring. The exposure rate of the stones on the surface is greater than 90%, and the proportion of the insertion depth of the stones on the surface is 1 / 3 - 1 / 2.

[0014] In a second aspect, the present invention provides a construction method for a concrete-filled steel tube sleeper with enhanced bonding performance. The construction method is based on the concrete-filled steel tube sleeper described in the first aspect. The construction method includes:

[0015] Preparing a mold according to the size of the sleeper block. The top of the mold is an open structure;

[0016] Performing fine machining on the steel pipe so that the surface of the steel pipe forms the first rough texture;

[0017] Placing the processed steel pipe and the steel reinforcement cage corresponding to the sleeper block in the mold, and pouring concrete to form a precast concrete-filled steel tube sleeper;

[0018] Demolding the precast concrete-filled steel tube sleeper, and performing rough treatment on the side bottom and bottom surface of each sleeper block to form the rough surface, thereby obtaining the concrete-filled steel tube sleeper.

[0019] Optionally, after placing the processed steel pipe and the steel reinforcement cage corresponding to the sleeper block in the mold, the method includes:

[0020] Coating a retarder at the positions on the inner wall of the mold corresponding to the side bottom and bottom surface of each sleeper block.

[0021] Optionally, the rough treatment of the side bottom and bottom surface of each sleeper block includes:

[0022] A protective cover is used to cover the top and top surfaces of the sides of each sleeper block, and a high-pressure water gun is used to flush the top and bottom surfaces of each sleeper block for multiple times until the slurry on the bottom and side surfaces of each sleeper block is cleaned.

[0023] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0024] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0025] Regarding the steel tube concrete sleeper with enhanced bonding performance provided by the embodiment of the present invention, on the one hand, since the outer peripheral wall of the steel tube is provided with a first rough texture extending along the axial direction of the steel tube, one end of the steel tube is inserted into one sleeper block, and the other end of the steel tube is inserted into another sleeper block, the surface roughness of the steel tube can be increased by the first rough thread provided on the outer wall of the steel tube, which not only increases the connection strength between the steel tube and the sleeper block, but also increases the connection strength between the steel tube and the roadbed in the future, avoiding the problem of misalignment or even cracks at the junction of the steel tube and the roadbed. On the other hand, the two sleeper blocks and the interior of the steel tube are integrally formed by pouring concrete, and the side bottom and bottom surface of each sleeper block are rough surfaces, which can also increase the connection strength between the sleeper block and the roadbed in the future, avoiding the problem of misalignment or even cracks at the junction of the sleeper block and the roadbed.

[0026] That is to say, the steel tube concrete sleeper with enhanced bonding performance provided by the embodiment of the present invention can not only increase the connection strength between the steel tube and the sleeper block, but also increase the connection strength between the subsequent rails and sleeper blocks and the roadbed, thereby avoiding the problem of misalignment or even cracks at the junction of the steel tube and the sleeper block and the roadbed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of a steel tube concrete sleeper with enhanced bonding performance provided by an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of a steel pipe provided by an embodiment of the present invention;

[0029] Figure 3 The present invention provides a flowchart of a construction method of a steel tube concrete sleeper with enhanced bonding performance.

[0030] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0031] 1. Sleeper block; 11. Rough surface; 12. Rail-bearing surface; 2. Steel pipe; 21. First rough texture; 22. Through hole; 23. Concrete; 3. Reinforcement plate; 31. Second rough texture. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, 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 used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.

[0037] Example:

[0038] Figure 1 Schematic diagram of the structure of a steel tube concrete sleeper with enhanced bonding performance provided by an embodiment of the present invention. Figure 1 As shown, the steel tube concrete sleeper includes two sleeper blocks 1 and at least one steel tube 2.

[0039] A first rough pattern 21 extending along the axial direction of the steel pipe 2 is provided on the outer wall of the steel pipe 2. One end of the steel pipe 2 is inserted in a sleeper block 1, and the other end of the steel pipe 2 is inserted in another sleeper block 1. The two sleeper blocks 1 and the interior of the steel pipe 2 are integrally formed by pouring concrete, and the side bottom and bottom surface of each sleeper block 1 are rough surfaces 11.

[0040] Regarding the steel tube concrete sleeper with enhanced bonding performance provided in an embodiment of the present invention, on the one hand, since the outer wall of the steel tube 2 is provided with a first rough line 21 extending along the axial direction of the steel tube 2, one end of the steel tube 2 is inserted into one sleeper block 1, and the other end of the steel tube 2 is inserted into another sleeper block 1, the surface roughness of the steel tube 2 can be increased by the first rough thread provided on the outer wall of the steel tube 2, which not only increases the connection strength between the steel tube 2 and the sleeper block 1, but also subsequently increases the connection strength between the steel tube 2 and the roadbed, avoiding the problem of misalignment or even cracks at the junction of the steel tube 2 and the roadbed. On the other hand, the two sleeper blocks 1 and the interior of the steel tube 2 are integrally formed by pouring concrete, and the side bottom and bottom surface of each sleeper block 1 are rough surfaces 11, which can also subsequently increase the connection strength between the sleeper block 1 and the roadbed, avoiding the problem of misalignment or even cracks at the junction of the sleeper block 1 and the roadbed.

[0041] That is to say, the steel tube concrete sleeper with enhanced bonding performance provided by the embodiment of the present invention can not only increase the connection strength between the steel tube 2 and the sleeper block 1, but also increase the connection strength between the subsequent rails and the sleeper block 1 and the roadbed, thereby avoiding the problem of misalignment or even cracks at the junction of the steel tube 2 and the sleeper block 1 and the roadbed.

[0042] For example, two spaced-apart steel pipes 2 may be provided between two opposing sleeper blocks 1 .

[0043] Figure 2 : is a cross-sectional view of a steel pipe provided in an embodiment of the present invention, as shown in FIG. Figure 2 As shown, the steel tube concrete sleeper further includes a plurality of ribs 3 , one side of each rib 3 is fixed on the outer peripheral wall of the steel tube 2 , and the other side of each rib 3 is inserted into the corresponding sleeper block 1 .

[0044] In the above-described embodiment, on the one hand, the rib plate 3 can increase the connection strength between the steel pipe 2 and the sleeper block 1. On the other hand, the middle part of the rib plate 3 will also be inserted into the roadbed subsequently. Since there are differences in the connection strength between the steel pipe 2 and the roadbed and between the sleeper block 1 and the roadbed, especially the connection strength difference between the connection of the steel pipe 2 and the sleeper block 1 and the roadbed is relatively large. Not only is it easy for fractures to occur between the steel pipe 2 and the roadbed and between the sleeper block 1 and the roadbed, but also fractures are extremely likely to occur at the corresponding connection points inside the roadbed. Through the rib plate 3, the steel pipe 2, the sleeper block 1, and the roadbed can be connected simultaneously to form an integral whole, reducing the large difference in the connection strength between the steel pipe 2 and the roadbed and between the sleeper block 1 and the roadbed, thereby reducing the risk of fractures between the steel pipe 2 and the roadbed, between the sleeper block 1 and the roadbed, and inside the roadbed.

[0045] Preferably, 4 rib plates 3 are provided at each end of the steel pipe 2, and the included angle between two adjacent rib plates 3 is 90°. The steel pipe 2 and the corresponding rib plate 3 are connected by welding.

[0046] Furthermore, the surface of each rib plate 3 has a second rough texture 31, and the roughness of the second rough texture 31 is greater than the roughness of the first rough texture 21 and the roughness of the rough surface 11.

[0047] It is easy to understand that the second rough texture 31 can increase the connection strength between the rib plate 3 and the subsequent roadbed. Moreover, the roughness of the second rough texture 31 is greater than the roughness of the first rough texture 21 and the roughness of the rough surface 11, making the connection strength between the rib plate 3 at the connection of the steel pipe 2 and the sleeper block 1 and the roadbed relatively large compared to the connection strength between the steel pipe 2 and the roadbed and between the sleeper block 1 and the roadbed. Through the rib plate 3, the steel pipe 2, the sleeper block 1, and the roadbed can be connected simultaneously to form an integral whole, especially with a large connection strength between the rib plate 3 and the roadbed, thereby further reducing the risk of fractures between the steel pipe 2 and the roadbed, between the sleeper block 1 and the roadbed, and inside the roadbed.

[0048] In addition, the steel pipe 2 has a plurality of through holes 22 arranged along the axial direction of the steel pipe 2. Each through hole 22 is arranged along the radial direction of the steel pipe 2, and one end of each through hole 22 facing away from the inner hole of the steel pipe 2 is arranged upward.

[0049] In the above-described embodiment, the through holes 22 serve to connect the inner hole of the steel pipe 2. When the sleeper block 1 is formed by pouring concrete, the concrete 23 will also fill the inside of the steel pipe 2, and a small amount of concrete slurry will overflow and solidify through the through holes 22 or not overflow from the through holes 22 (the through holes 22 can also exhaust air during the pouring process). The outer surface of the steel pipe 2 is uneven, and at this time, the roughness of the surface of the steel pipe 2 can also be increased, so that the connection strength between the roadbed and the steel pipe 2 can be increased during the subsequent pouring of the roadbed.

[0050] It is easy to understand that one end of each through hole 22 facing away from the inner hole of the steel pipe 2 is arranged upward, which can prevent the concrete slurry from flowing out of the through hole 22 due to gravity during the pouring process.

[0051] It should be noted that the diameter of the through hole 22 is small and should not be too large, which can not only prevent the structural strength of the steel pipe 2 from being reduced, but also prevent a large amount of concrete slurry from flowing out of the through hole 22.

[0052] In one implementation manner of the present invention, the first rough texture 21 is a spiral groove, and the spiral groove is processed by a thread rolling machine. The pitch of the spiral groove is 1.5 - 3 mm, and the depth is 0.1 - 0.3 m. That is, the first rough texture 21 in the form of a spiral groove is formed on the surface of the steel pipe 2, so that the concrete will fully fill these spiral grooves when the roadbed is poured subsequently, thereby increasing the connection strength between the steel pipe 2 and the roadbed.

[0053] In another implementation manner of the present invention, the first rough texture 21 is a mesh groove, and the mesh groove is cut by a cutting machine. The mesh pitch of the mesh groove is 2 - 3 mm, and the depth is 0.1 - 0.3 m. That is, a grid groove is formed on the surface of the steel pipe 2, so that the concrete will fully fill these grid grooves when the roadbed is poured subsequently, thereby increasing the connection strength between the steel pipe 2 and the roadbed.

[0054] Exemplarily, the mesh groove is inclined at an angle of 30° - 50° with the cross section of the steel pipe 2.

[0055] In this embodiment, the rough surface 11 is the surface formed by water washing after concrete pouring. The exposure rate of the stones on the surface is greater than 90%, and the insertion depth ratio of the stones on the surface is 1 / 3 - 1 / 2 (that is, 1 / 3 - 1 / 2 of the stone size is inserted into the sleeper block 1), so as to ensure the roughness of the side and bottom surfaces of the sleeper block 1 and increase its connection strength with the roadbed.

[0056] It should be noted that in other embodiments of the present invention, the rough surface 11 can also be formed on the side bottom and bottom surfaces of each sleeper block 1 by embedding steel bars and anchoring steel bars, and the present invention does not limit this.

[0057] Figure 3 It is a flowchart of a construction method of a concrete-filled steel tube sleeper for enhancing the bonding performance provided by an embodiment of the present invention. As Figure 3 shown, this construction method is based on the above-mentioned concrete-filled steel tube sleeper, and this construction method includes:

[0058] S1. Prepare a mold according to the size of the sleeper block 1, and the top of the mold is an open structure.

[0059] Exemplarily, the length of the mold is 852 mm, the width is 320 mm, the depth is 200 mm, and the mold is composed of four side surfaces and a bottom plate.

[0060] S2. Finish the precision machining of the steel pipe 2 so that a first rough texture 21 is formed on the surface of the steel pipe 2.

[0061] As can be seen from the foregoing, the first rough texture 21 can be a spiral groove machined by a thread rolling machine or a grid groove cut by a cutting machine.

[0062] S3. Place the processed steel pipe 2 and the corresponding steel reinforcement cage of the sleeper block 1 in a mold, and pour concrete to form a precast steel pipe concrete sleeper.

[0063] S4. Demold the precast steel pipe concrete sleeper, and roughen the side bottom and bottom surface of each sleeper block 1 to form a rough surface 11, thereby obtaining a steel pipe concrete sleeper.

[0064] The construction method of a steel pipe concrete sleeper for enhancing the bonding performance provided by the embodiment of the present invention can not only increase the connection strength between the steel pipe 2 and the sleeper block 1, but also increase the connection strength between the subsequent rail and the sleeper block 1 and the roadbed, and avoid the problems of dislocation or even cracks at the joint between the steel pipe 2 and the sleeper block 1 and the roadbed.

[0065] Further, after placing the processed steel pipe 2 and the corresponding steel reinforcement cage of the sleeper block 1 in the mold, the method includes:

[0066] Apply a retarder to the positions on the inner wall of the mold corresponding to the side bottom and bottom surface of each sleeper block 1.

[0067] In the above embodiment, the retarder can inhibit the solidification of the side bottom and bottom surface of each sleeper block 1 during the process of pouring concrete, so as to facilitate the formation of the rough surface 11 after the floating slurry on the surface is cleaned up.

[0068] In addition, the rough treatment of the side bottom and bottom surface of each sleeper block 1 includes:

[0069] Cover the side top and top surface of each sleeper block 1 with a protective cover, and rinse with a high-pressure water gun for multiple times until the floating slurry on the side bottom and bottom surface of each sleeper block 1 is cleaned up.

[0070] In the above embodiment, the protective cover can cover the surface of the sleeper block 1 to prevent the load-bearing surface 12 and the shoulder of the sleeper block 1 from being rinsed during the process of rinsing with the high-pressure water gun, thereby avoiding affecting its quality. In addition, rinsing with the stamping water gun can wash away the floating slurry on the surface of the sleeper block 1, so that the stones on its surface are exposed, and then a rough surface 11 is formed to increase the connection strength between the subsequent sleeper block 1 and the roadbed.

[0071] It should be noted that the retarding agent brushing and high-pressure water gun flushing can be used in combination. That is, after demoulding, use a high-pressure water gun to flush. After flushing once, use a rag or a brush to perform secondary cleaning on the parts where the retarding agent is applied. Finally, use a high-pressure water gun to clean until the floating slurry is completely cleaned up.

[0072] Those skilled in the art can easily understand that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A concrete-filled steel tubular sleeper with enhanced bonding performance, characterized in that, The concrete-filled steel tube sleeper includes two sleeper blocks (1) and at least one steel tube (2); A first rough texture (21) extending along the axial direction of the steel tube (2) is provided on the outer peripheral wall of the steel tube (2). One end of the steel tube (2) is inserted into one of the sleeper blocks (1), and the other end of the steel tube (2) is inserted into the other sleeper block (1). The two sleeper blocks (1) and the interior of the steel tube (2) are integrally formed by casting concrete, and the side bottoms and bottoms of the sleeper blocks (1) are all rough surfaces (11).

2. The concrete-filled steel tubular sleeper for enhancing the bonding performance according to claim 1, wherein The concrete-filled steel tube sleeper further includes a plurality of rib plates (3). One side of each rib plate (3) is fixed on the outer peripheral wall of the steel tube (2), and the other side of each rib plate (3) is inserted into the corresponding sleeper block (1).

3. The concrete-filled steel tubular sleeper for enhancing the bonding performance according to claim 2, wherein, The surface of each rib plate (3) has a second rough texture (31), and the roughness of the second rough texture (31) is greater than the roughness of the first rough texture (21) and the roughness of the rough surface (11).

4. The concrete-filled steel tubular sleeper for enhancing the bonding performance according to claim 1, wherein The first rough texture (21) is a spiral groove, and the spiral groove is processed by a thread rolling machine. The pitch of the spiral groove is 1.5 - 3 mm, and the depth is 0.1 - 0.3 m.

5. The concrete-filled steel tubular sleeper for enhancing the bonding performance according to claim 1, characterized in that The first rough texture (21) is a mesh groove, and the mesh groove is cut by a cutting machine. The mesh spacing of the mesh groove is 2 - 3 mm, and the depth is 0.1 - 0.3 m.

6. A concrete-filled steel tubular sleeper for enhancing bonding performance according to any one of claims 1-5, characterized in that, The steel tube (2) has a plurality of through holes (22) arranged along the axial direction of the steel tube (2). Each through hole (22) is arranged along the radial direction of the steel tube (2), and one end of each through hole (22) facing away from the inner hole of the steel tube (2) is arranged upward.

7. A concrete-filled steel tubular sleeper for enhancing bonding performance according to any one of claims 1-5, characterized in that The rough surface (11) is the surface formed by water washing after concrete casting. The exposure rate of the stones on the surface is greater than 90%, and the penetration depth ratio of the stones on the surface is 1 / 3 - 1 / 2.

8. A construction method of a concrete-filled steel tube sleeper for enhancing bonding performance, characterized in that, The construction method is based on the concrete-filled steel tube sleeper according to any one of claims 1 - 7. The construction method includes: Preparing a mold according to the size of the sleeper block (1). The top of the mold is an open structure; Performing finish machining on the steel tube (2) so that the first rough texture (21) is formed on the surface of the steel tube (2); Placing the processed steel tube (2) and the corresponding steel reinforcement cage of the sleeper block (1) in the mold, and pouring concrete to form a precast concrete-filled steel tube sleeper; Demolding the precast concrete-filled steel tube sleeper, and performing rough treatment on the side bottoms and bottoms of the sleeper blocks (1) to form the rough surface (11), thereby obtaining the concrete-filled steel tube sleeper.

9. The construction method of a concrete-filled steel tubular sleeper for enhancing bonding performance according to claim 8, characterized in that, After placing the processed steel tube (2) and the corresponding steel reinforcement cage of the sleeper block (1) in the mold, the method includes: Coating a retarder on the inner wall of the mold at the positions corresponding to the side bottoms and bottoms of the sleeper blocks (1).

10. The construction method of a concrete-filled steel tubular sleeper for enhancing bonding performance according to claim 8, characterized in that, The rough treatment of the side bottoms and bottoms of the sleeper blocks (1) includes: Cover the top of the side surface and the top surface of the sleeper block (1) with a protective cover, and rinse it many times with a high-pressure water gun until the floating slurry on the bottom surface of the side surface and the bottom surface of each sleeper block (1) is cleaned up.

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