CN220746450U - Concrete sleeper - Google Patents

Abstract

The utility model discloses a concrete sleeper, which relates to the technical field of sleepers and comprises the following components: the main body comprises a sleeper middle part, sleeper edge parts which are symmetrically and fixedly connected with two ends of the sleeper middle part, and a rail bearing table which is fixed on the top of the sleeper edge parts; the width of the pillow edge part is larger than that of the pillow middle part to form a thin waist-shaped sleeper structure; the two side walls of the pillow side are both transition inclined planes which incline towards the middle of the pillow. The utility model has the characteristics of long service life, stable structure, low production cost and strong durability.

Description

Concrete sleeper

Technical Field

The utility model relates to the technical field of sleepers, in particular to a concrete sleeper.

Background

The railway concrete sleeper is one of the indispensable infrastructures in railway transportation, and has the main functions of supporting railway tracks, dispersing load and vibration force generated during train operation and ensuring the safety and stability of railway lines. However, the conventional railway concrete sleeper has problems of short service life, poor durability, high maintenance cost, etc., which limit the safety and efficiency of railway transportation, and adversely affect the normal operation of railway lines.

Chinese patent (grant bulletin number CN 217579533U, grant bulletin day 2022.10.14) discloses a sleeper, specifically a sleeper including a main body having a reinforcement cage, the main body including a sleeper middle portion and side portions symmetrically disposed at both sides of the sleeper middle portion; the section of the sleeper main body in the longitudinal direction is mainly trapezoidal; the bottom surface of the sleeper main body, which is contacted with the ballast bed, is obviously rectangular, and the main impact force born by the sleeper main body is concentrated at the corresponding sleeper edge position under the rail, so that the rectangular sleeper bottom surface cannot effectively reduce the dynamic pressure of the sleeper edge to the ballast bed, vibration noise is easy to generate, the stability of the sleeper is further influenced, and the service life of the sleeper is not prolonged.

Therefore, how to provide a concrete sleeper has the characteristics of long service life, stable structure, low production cost and strong durability, and is a problem to be solved by the technicians in the field.

Disclosure of Invention

In view of the above, the present utility model proposes a concrete sleeper to solve the above technical problems. The concrete sleeper has the advantages of long service life, stable structure, low production cost and strong durability.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a concrete sleeper, comprising:

the main body comprises a sleeper middle part, sleeper edge parts which are symmetrically and fixedly connected to two ends of the sleeper middle part, and a rail bearing table which is fixed to the top of the sleeper edge parts;

the width of the sleeper edge is larger than that of the sleeper middle part so as to form a thin waist-shaped sleeper structure; the end parts of the two side walls of the pillow side part, which are close to the middle part of the pillow, are transition inclined planes which incline towards the middle part of the pillow.

Compared with the prior art, the concrete sleeper is of a thin waist-shaped sleeper structure, the width of the sleeper edge is larger than that of the sleeper middle part, namely the structure of the sleeper edge positioned under a steel rail is reinforced by increasing the width of the sleeper edge, the contact area between the sleeper edge distributed at two ends of the sleeper and a ballast bed at the bottom of the sleeper is increased, the capacity of bearing the load transmitted by the steel rail can be improved by the sleeper edge with the increased width, so that dynamic compressive stress on the ballast bed at the bottom of the sleeper is reduced, meanwhile, the thin waist-shaped variable-section structure is formed at the middle part of the sleeper by reducing the width of the sleeper middle part, and therefore the transverse resistance on the ballast bed is improved, the integral stress characteristic of the track structure is improved, and the service life of the concrete sleeper is prolonged while the tamping maintenance period of the ballast bed is prolonged.

As a further improvement of the technical scheme, the cross sections of the middle part and the side parts of the pillow are trapezoidal; the width of the bottom edge of the cross section of the pillow middle part is 180-270 mm, the width of the bottom edge of the cross section of the pillow edge part is 250-340 mm, and the difference value between the width of the bottom edge of the cross section of the pillow middle part and the width of the bottom edge of the cross section of the pillow edge part is 50-100 mm.

The bottom surface of the concrete sleeper adopts a variable cross-section design of a thin waist, the width of the bottom edge of the cross section of the sleeper middle part is 180-270 mm, the width of the bottom edge of the cross section of the sleeper edge is 250-340 mm, and the difference value of the widths of the two bottom edges is 50-100 mm, so that the optimal design of the sleeper structure is realized, the supporting area of the lower track bed of the steel rail is increased, the width of the middle cross section is reduced, the dynamic compressive stress of the ballast track bed is reduced, the vibration noise is reduced, the overall transverse resistance of a track line is improved, and the effect of improving the overall use performance of the track structure is achieved.

As a further improvement of the technical scheme, the end face, far away from the middle part of the pillow, of the side part of the pillow is obliquely arranged towards the middle part of the pillow, the inclination gradient is 1:8-1:12, and the two sides of the end face along the width direction are provided with 10-20 mm inverted right angles.

The end face is designed into an inclined plane structure with a certain inclined gradient and a chamfer structure at two sides of the end face, so that the sleeper can be conveniently demoulded during processing and manufacturing.

As a further improvement of the technical scheme, the transition inclined plane is a plane, and one side of the transition inclined plane, which is far away from the middle part of the pillow, is provided with an arc chamfer I; the radius of the arc chamfer is 20mm-50mm.

The transitional inclined plane plays a role in increasing the transverse resistance of the sleeper, the first arc chamfer is designed to prevent the sleeper from being blocked and concentrated in stress during the releasing and demoulding, the concrete structure damage caused by the phenomenon can be avoided, and the effect of facilitating the sleeper production and manufacturing is achieved.

As a further improvement of the technical scheme, a pad mounting groove for mounting a track pad is formed in the top of the rail bearing table along the length direction of the sleeper; the bottom of the base plate mounting groove is provided with a preformed hole extending to the inside of the pillow edge.

The pad mounting groove plays a role in limiting the steel rail pad, and can prevent the pad from jumping; the preformed hole is used for installing the spike.

As a further improvement of the technical scheme, the base plate mounting groove is of a cuboid structure, two ends of the base plate mounting groove are open, the upper edge of the side wall of the base plate mounting groove is provided with a second arc chamfer, and the radius of the second arc chamfer is 3mm-5mm.

The arc chamfer on the side wall of the base plate mounting groove can avoid cutting the base plate under the dynamic load action of the train, and the service life of the base plate is prolonged.

As a further improvement of the technical scheme, the pillow edge part is internally provided with a spiral rib encircling the outside of the reserved hole.

The spiral rib plays a role in strengthening the structural strength of the preformed hole.

As a further improvement of the technical scheme, the steel reinforcement cage comprises a prestressed steel wire and stirrups; the prestressed steel wires are arranged in the middle part of the sleeper and the inner part of the sleeper edge along the length direction of the sleeper; the number of the prestressed wires is multiple, and the prestressed wires are parallel and are arranged at intervals; the stirrups are a plurality of, and a plurality of stirrups are arranged at intervals along the length direction of the prestressed steel wire and are all sleeved outside the prestressed steel wires to form a reinforcement cage structure.

The reinforcement cage structure formed by the prestressed steel wires and the stirrups further improves the bearing capacity of the concrete sleeper.

Compared with the prior art, the concrete sleeper provided by the utility model has the following advantages and beneficial effects:

1. according to the utility model, the width of the bottom edge of the cross section of the sleeper edge part which directly bears the load transmitted by the steel rail is increased in the design process of the concrete sleeper, so that the dynamic compressive stress on the ballast bed at the bottom of the sleeper is reduced, meanwhile, the width of the bottom edge of the cross section of the middle part of the sleeper is reduced, and a thin waist variable cross section structure is formed in the middle part of the sleeper, so that the transverse resistance of the sleeper in the ballast bed is improved, the integral stress characteristic of the track structure is improved, and the service life of the concrete sleeper is prolonged while the tamping maintenance period of the ballast bed is prolonged; besides meeting the operation requirements of common passenger and cargo collinear railways, the system can still meet the operation requirements of ballasted track lines for common heavy load railways, high-speed railways, subways and light rails.

2. The concrete sleeper is convenient to demould during manufacturing, is beneficial to sleeper production and manufacturing, and has low production cost, strong durability and good overall structural stability.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic top view of a concrete sleeper of the present utility model;

FIG. 2 is a schematic front view of a concrete tie of the present utility model;

FIG. 3 is a cross-sectional view of one of the concrete ties of FIG. 1;

FIG. 4 is a cross-sectional view of a prestressed wire arrangement A-A of a concrete tie of FIG. 1;

FIG. 5 is a cross-sectional view of a prestressed wire arrangement B-B of a concrete tie of FIG. 1;

FIG. 6 is a cross-sectional view of an alternative pre-stressed wire arrangement A-A of the concrete tie of FIG. 1;

FIG. 7 is a cross-sectional view of an alternative pre-stressed wire arrangement B-B of the concrete tie of FIG. 1;

fig. 8 is a right side view of a concrete sleeper according to the present utility model.

In the figure: 1. a main body; 11. the middle part of the pillow; 12. a pillow edge part; 121. a transition inclined plane; 1211. arc chamfering I; 122. an end face; 13. a rail bearing table; 131. a backing plate mounting groove; 132. a preformed hole; 133. arc chamfering II; 2. a reinforcement cage; 21. a prestressed steel wire; 22. stirrups; 3. spiral ribs.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1 to 8, the present utility model provides a concrete sleeper, including:

the main body 1, the main body 1 is of a concrete structure, and the main body 1 comprises a sleeper middle part 11, sleeper side parts 12 which are symmetrically and integrally connected with two ends of the sleeper middle part 11 and a rail bearing table 13 which is integrally connected with the top of the sleeper side parts 12;

the width of the sleeper edge 12 is larger than that of the sleeper middle 11 to form a thin waist sleeper structure; the two side walls of the pillow side 12 are provided with transition inclined planes 121 which incline towards the direction of the pillow middle 11 at the end close to the pillow middle 11.

The concrete sleeper provided by the embodiment is of a thin waist-shaped sleeper structure, the width of the sleeper edge 12 is larger than that of the sleeper middle part 11, namely, the structure of the sleeper edge 12 positioned under a steel rail is reinforced by increasing the width of the sleeper edge 12, the contact area between the sleeper edge 12 distributed at two ends of the sleeper and a ballast bed at the bottom of the sleeper is increased, the sleeper edge 12 with the increased width can improve the capacity of bearing the load transmitted by the steel rail so as to reduce the dynamic compressive stress borne by the ballast bed at the bottom of the sleeper, and meanwhile, the sleeper middle part is made to form a thin waist variable cross-section structure by reducing the width of the sleeper middle part 11, so that the transverse resistance borne by the sleeper in the ballast bed is improved, the integral stress characteristic of the track structure is improved, and the service life of the concrete sleeper is prolonged while the tamping maintenance period of the ballast bed is prolonged.

Specifically, the transition slope 121 forms an angle of 30 degrees to 60 degrees with the width direction of the pillow portion 12.

In some embodiments, the cross-sections of the occipital portion 11 and occipital side portion 12 are both trapezoidal; the width of the bottom edge of the cross section of the pillow middle part 11 is 180-270 mm, the width of the bottom edge of the cross section of the pillow side part 12 is 250-340 mm, and the difference between the width of the bottom edge of the cross section of the pillow middle part 11 and the width of the bottom edge of the cross section of the pillow side part 12 is 50-100 mm.

The bottom surface of the concrete sleeper adopts a variable cross-section design of a thin waist, the width of the bottom edge of the cross section of the sleeper middle part 11 is 180-270 mm, the width of the bottom edge of the cross section of the sleeper edge part 12 is 250-340 mm, and the difference value of the widths of the bottom edges is 50-100 mm, so that the optimal design of the sleeper structure is realized, the supporting area of the lower ballast bed of the steel rail is increased, the width of the middle cross section is reduced, the dynamic compressive stress of the ballast track bed is further reduced, the vibration noise is reduced, the overall transverse resistance of a track line is improved, and the effect of improving the overall use performance of the track structure is achieved.

In some embodiments, the end face 122 of the pillow edge 12 away from the pillow middle 11 is inclined toward the side of the pillow middle 11, the inclination is 1:8 to 1:12, and two sides of the end face 122 along the width direction of the pillow have 10 mm-20 mm inverted right angles.

The end face 122 is designed to be an inclined surface structure with a certain inclined gradient and chamfer structures at two sides of the end face 122, so that the sleeper can be conveniently demolded during processing and manufacturing.

In some embodiments, the transition bevel 121 is planar, and a side of the transition bevel 121 remote from the pillow middle 11 has a rounded chamfer 1211; the radius of the arc chamfer 1211 is 20mm-50mm.

The transitional inclined plane 121 plays a role in increasing the transverse resistance of the sleeper, and the design of the arc chamfer 1211 can prevent the sleeper from being blocked and concentrated in stress during the stretching and demoulding, so that the damage of the concrete structure caused by the blockage can be avoided, and the effect of being beneficial to the production and the manufacture of the sleeper is achieved.

In some embodiments, the top of the rail bearing table 13 has a tie plate mounting groove 131 along the length of the tie for mounting a rail tie plate; the bottom of the pad mounting groove 131 has a preformed hole 132 extending into the pillow edge 12.

The pad mounting groove 131 plays a role in limiting the steel rail pad, and can prevent the pad from jumping; the preformed hole 132 is used to install the spike.

In some embodiments, the pad mounting groove 131 has a cuboid structure, two ends of the pad mounting groove are open, the upper edge of the side wall of the pad mounting groove 131 is provided with a second arc chamfer 133, and the radius of the second arc chamfer 133 is 3mm-5mm.

The arc chamfer on the side wall of the pad plate mounting groove 131 can avoid cutting the pad plate under the dynamic load action of the train, and the service life of the pad plate is prolonged.

In some embodiments, the pillow portion 12 is internally provided with a helical rib 3 that surrounds the exterior of the preformed hole 132. The spiral rib 3 plays a role in reinforcing the structural strength of the preformed hole 132.

In some embodiments, the steel reinforcement cage 2 is further comprised, and the steel reinforcement cage 2 comprises a prestressed steel wire 21 and stirrups 22; as shown in fig. 4 and 5, a prestressed wire arrangement is provided; the prestressed steel wires 21 are arranged in the sleeper middle 11 and the sleeper side 12 along the sleeper length direction; the number of the prestressed steel wires 21 is multiple, and the prestressed steel wires 21 are parallel and are arranged at intervals; the stirrups 22 are a plurality of and all are located the inside at pillow middle part 11 and pillow limit portion 12, and stirrups 22 are the rectangle, and a plurality of stirrups 22 set up along prestressing steel 21 length direction interval, and a plurality of stirrups 22 all overlap and establish the outside at a plurality of prestressing steel 21, and a plurality of prestressing steel 21 distribute along stirrup 22 circumference and bind with stirrup 22 in order to constitute the steel reinforcement cage structure.

In some embodiments, as shown in fig. 6 and 7, a pre-stressed steel wire arrangement is provided; the stirrup 22 is trapezoidal, and the prestressing steel wire 21 divides into two groups, and one group prestressing steel wire 21 distributes along stirrup 22 circumference and binds with stirrup 22, and another group prestressing steel wire 21 arranges in the middle part in stirrup 22.

The reinforcement cage structure formed by the prestressed steel wires 21 and the stirrups 22 further improves the bearing capacity of the concrete sleeper.

The concrete sleeper can be produced by adopting a short-die flow machine set method, single prestressed steel wire tensioning can be realized, and the prestress of each prestressed steel wire can be accurately controlled, so that the material cost and the labor cost are saved. In addition, the utility model can save the steel wire consumption and further reduce the production cost by reasonably configuring the high-strength prestressed steel wire; the prestressed concrete sleeper has higher crack resistance and fatigue strength, can meet the use requirement of a high-speed train, and compared with the traditional sleeper, the prestressed concrete sleeper has the advantages that the service life can be greatly prolonged, and the maintenance cost and the replacement frequency are greatly reduced.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (8)

1. A concrete tie, comprising:

the main body (1), the main body (1) comprises a pillow middle part (11), pillow edge parts (12) symmetrically and fixedly connected with two ends of the pillow middle part (11) and a rail bearing table (13) fixed on the top of the pillow edge parts (12);

the width of the pillow edge part (12) is larger than that of the pillow middle part (11) to form a thin waist-shaped sleeper structure; the two side walls of the pillow side part (12) are near the end part of the pillow middle part (11) and are transition inclined planes (121) inclined towards the direction of the pillow middle part (11).

2. A concrete sleeper according to claim 1, characterized in that the cross-section of the sleeper middle portion (11) and the sleeper edge portion (12) are both trapezoidal; the width of the bottom edge of the cross section of the pillow middle part (11) is 180-270 mm, the width of the bottom edge of the cross section of the pillow side part (12) is 250-340 mm, and the difference value between the width of the bottom edge of the cross section of the pillow middle part (11) and the width of the bottom edge of the cross section of the pillow side part (12) is 50-100 mm.

3. A concrete sleeper according to claim 1, characterized in that the end face (122) of the sleeper edge portion (12) which is far from the sleeper middle portion (11) is obliquely arranged toward the sleeper middle portion (11) with an inclination of 1:8 to 1:12, and both sides of the end face (122) in the width direction have a reverse right angle of 10mm to 20 mm.

4. A concrete sleeper according to claim 1, characterized in that the transition slope (121) is planar and that the side of the transition slope (121) remote from the sleeper middle (11) is provided with a circular arc chamfer (1211); the radius of the arc chamfer I (1211) is 20mm-50mm.

5. The concrete sleeper according to claim 1, wherein a pad mounting groove (131) for mounting a track pad is formed in the top of the rail bearing table (13) along the length direction of the sleeper; the bottom of the base plate mounting groove (131) is provided with a preformed hole (132) extending to the inside of the pillow edge part (12).

6. The concrete sleeper according to claim 5, wherein the pad mounting groove (131) is of a cuboid structure and is open at two ends, the upper edge of the side wall of the pad mounting groove (131) is provided with a circular arc chamfer angle II (133), and the radius of the circular arc chamfer angle II (133) is 3-5 mm.

7. A concrete sleeper according to claim 5, characterized in that the sleeper edge portion (12) is internally provided with a spiral rib (3) encircling the outside of the preformed hole (132).

8. A concrete sleeper according to claim 1, characterized by further comprising a reinforcement cage (2), said reinforcement cage (2) comprising prestressed wires (21) and stirrups (22); the prestressed steel wires (21) are arranged in the sleeper middle part (11) and the sleeper side part (12) along the length direction of the sleeper; the number of the prestressed steel wires (21) is multiple, and the prestressed steel wires (21) are parallel and are arranged at intervals; the stirrups (22) are a plurality of, and a plurality of stirrups (22) are arranged at intervals along the length direction of the prestressed steel wire (21) and are sleeved outside the prestressed steel wire (21) so as to form a reinforcement cage structure.