Reinforced concrete sleeper

Abstract

The utility model relates to the technical field of concrete sleepers, in particular to a reinforced concrete sleeper. Comprising a concrete sleeper, rail grooves are formed in the end faces of the two ends of the concrete sleeper, a net cage and a prestressed steel strand are arranged in the concrete sleeper, the two ends of the prestressed steel strand penetrate through the concrete sleeper, and the two ends of the prestressed steel strand are connected with anchorage devices abutting against the two ends of the concrete sleeper; frames are arranged at the two ends of the concrete and located on the sides of the two rail grooves, and the upper ends of the frames extend out of the concrete sleeper end face and are detachably provided with top plates abutting against the side edges of wheels. Prestressed steel strands are arranged in the concrete sleeper through a pre-tensioning method, and the fatigue resistance of the concrete sleeper is enhanced. The net cage can improve the strength of the concrete sleeper, and the concrete sleeper is prevented from cracking after bearing loads for a long time due to over-brittleness. The rail groove and the top plate abut against the vehicle rail, the vehicle rail is doubly limited, even if fastening pieces such as bolts for fastening the vehicle rail are loosened, the vehicle rail is not prone to deviation temporarily, and the accident occurrence probability is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete sleeper, in particular to a reinforced concrete sleeper. BACKGROUND

[0002] In the track structure, the sleeper is used to bear various forces from the steel rail and transfer to the track bed, and also used to keep the direction, gauge and position of the steel rail.

[0003] With the development of high speed and heavy load railway, the concrete sleeper has become the development direction to replace the wooden sleeper. Because the ordinary reinforced concrete sleeper has poor bending resistance and is easy to crack, the prestressed concrete sleeper is formed after gradual improvement. The traditional prestressed sleeper contains the steel bar for applying prestress during pouring. After pouring, the steel bar loses the tension and tends to be rolled up, which applies stress to the concrete sleeper, so that the concrete sleeper has good crack resistance. However, the overall concrete material still causes the deficiencies of the bending resistance and fatigue resistance of the concrete sleeper. Meanwhile, the rail is generally fastened on the concrete sleeper by bolts, which is easy to loosen under the impact of train load for a long time, and even causes the rail to deviate, which affects the stability of train operation.

[0004] Therefore, the present application provides a reinforced concrete sleeper to improve the strength and fatigue resistance of the concrete sleeper, and increase the limitation of the rail to improve the lateral deviation resistance of the rail. CONTENT OF THE INVENTION

[0005] The present application aims at solving the problems in the prior art and provides a reinforced concrete sleeper.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] A reinforced concrete sleeper, comprising a concrete sleeper, both ends of the concrete sleeper are provided with rail grooves, a net cage and a prestressed steel strand are arranged in the concrete sleeper, both ends of the prestressed steel strand penetrate through the concrete sleeper, both ends of the prestressed steel strand are connected with an anchor device abutting against both ends of the concrete sleeper; both ends of the concrete sleeper are provided with frames on both sides of the two rail grooves, the upper end of the frame extends out of the end surface of the concrete sleeper, and a top plate abutting against the side of the wheel is detachably installed on the upper end of the frame.

[0008] Preferably, a screw rod is welded and fixed on the upper end of the frame, a through hole is arranged on the top plate for the screw rod to pass through, and a nut is screwed on the screw rod and abuts against the end surface of the top plate.

[0009] Preferably, a clamping groove matched with the upper end of the frame is arranged at the bottom end of the connection between the top plate and the frame.

[0010] Preferably, the frame is in the shape of an I-beam.

[0011] Preferably, the steel reinforcement of the cage is welded with a baffle at both ends, and the baffle is embedded in the concrete sleeper at both ends.

[0012] Preferably, the prestressed steel strand is provided with a plurality of.

[0013] Preferably, the vertical section of the concrete sleeper is trapezoidal.

[0014] Compared with the prior art, the present application provides a reinforced concrete sleeper, which has the following beneficial effects:

[0015] 1. The prestressed steel strand is arranged in the concrete sleeper by the pretensioning method, which enhances the fatigue resistance of the concrete sleeper. The cage arranged in the concrete sleeper can improve the strength of the concrete sleeper and avoid the cracking of the concrete sleeper after bearing load for a long time.

[0016] 2. The rail is arranged in the rail groove, and the rail is limited by the rail groove. Meanwhile, the rail can be limited by the top plate, and the rail is limited twice, so that the rail is not easily deviated even if the fastener such as the bolt fastening the rail is loosened, and the probability of accidents is reduced.

[0017] 3. The top plate and the frame are detachably connected, so that the top plate and the frame can be replaced after being deformed under stress.

[0018] 4. The frame and the concrete sleeper are integrally cast and formed, so that the connection is not easily separated and the structural strength of the concrete sleeper is not damaged, compared with subsequent drilling and installation.

[0019] Other advantages, objects and features of the present application will be explained in the following description; and to some extent, it will be obvious to those skilled in the art based on the following description; or it can be taught from the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a plan view of the present application.

[0021] Figure 2 is a sectional view of the present application Figure 1 A-A of the present application.

[0022] Figure 3 is a separated view of the concrete sleeper, the frame and the top plate of the present application.

[0023] Figure 4 is a perspective view of the present application Figure 1 of the present application.

[0024] Figure 5 is a close-up view of the present application Figure 4 of the present application.

[0025] In the figure: 1, concrete sleeper; 2, cage; 3, baffle; 4, prestressed steel strand; 5, anchorage device; 6, embedding groove; 7, frame; 8, top plate; 9, screw rod; 10, nut; 11, rail; 12, rail slot. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Figures 1-5 It should be apparent that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0027] In order to solve the problems in the prior art, the present embodiment provides a reinforced concrete sleeper, which comprises a concrete sleeper 1, the two end faces of the concrete sleeper 1 are provided with rail slots 12, the concrete sleeper 1 is provided with a cage 2 and prestressed steel strands 4, the two ends of the prestressed steel strands 4 penetrate through the concrete sleeper 1, and the two ends of the prestressed steel strands 4 are connected with anchorage devices 5 abutting against the two ends of the concrete sleeper 1; the two ends of the concrete sleeper are provided with frames 7 on the sides of the two rail slots 12, the upper ends of the frames 7 extend out of the end faces of the concrete sleeper 1, and the upper ends of the frames 7 are detachably provided with top plates 8 abutting against the side edges of the wheels.

[0028] Principle details of the present embodiment:

[0029] The reinforced concrete sleeper comprises a concrete sleeper 1, a cage 2 made of steel bars, prestressed steel strands 4, frames 7 made of high-strength metal, and top plates 8 made of high-strength metal.

[0030] The shape of the mold cavity of the mold for manufacturing the sleeper is the upside-down shape of the sleeper, i.e., the bottom wall of the mold cavity is the top wall of the sleeper. The two ends of the bottom wall of the mold cavity are provided with protrusions, so that after pouring, the rail slots 12 for mounting the sleeper are formed on the end faces of the concrete sleeper 1. The two ends of the bottom wall of the mold cavity are provided with embedding grooves 6, and the upper ends of the frames 7 and the embedding grooves 6 are regular shapes, such as rectangular shapes in the top view. In this way, the frames 7 are conveniently positioned after being embedded, and the frames 7 will not deviate during pouring and affect the structural position after pouring and forming, and a flat base is provided for mounting the top plates 8. In addition, the upper ends of the frames 7 are embedded in the embedding grooves 6, and after pouring is completed, the upper end faces of the frames 7 are exposed, which is convenient for mounting the top plates 8.

[0031] In the production, the top end of the frame 7 is embedded into the embedding groove 6, and is embedded by hammering. Then the cage 2 is arranged in the mold, the prestressed steel wire 4 crosses the mold, and the prestressed steel wire 4 is taut by the hydraulic tensioning machine at both ends. Then the concrete slurry is poured, so as to be integrally formed with the cage 2, the prestressed steel wire 4 and the frame 7 into the concrete sleeper 1. After pouring, the anchorage device 5 is arranged at both ends of the prestressed steel wire 4, and the anchorage device 5 abuts against both ends of the concrete sleeper 1, so as to tautly fix the prestressed steel wire 4. Then the formed concrete sleeper 1 is lifted and transferred. The top plate 8 can be directly installed on the top wall of the frame 7 after the concrete sleeper 1 is stably arranged, or the top plate 8 can be installed after the concrete sleeper 1 is fastened on the track and the rail 11 is fastened on the concrete sleeper 1.

[0032] According to the above technical scheme:

[0033] The prestressed steel wire 4 is taut by the pretensioning method, the prestressed steel wire 4 is taut to give the concrete sleeper 1 a concave taut trend, the trend counteracts and neutralizes the sinking trend of the concrete sleeper 1 after bearing the load, so that the concrete sleeper 1 is not easily deformed, the fatigue resistance of the concrete sleeper 1 is enhanced, and the stability of the rail 11 installation and the running safety are improved. The cage 2 arranged in the concrete sleeper 1 can improve the strength of the concrete sleeper 1, and avoid the concrete sleeper 1 being too brittle and cracking after bearing the load for a long time. After the rail 11 is installed, the rail 11 is arranged in the rail groove 12, the rail 11 is limited by the rail groove 12, and the rail 11 can be further limited by the abutment of the top plate 8, so that the rail 11 is doubly limited, even if the fastening bolt or the like of the rail 11 is loose, the rail 11 will not be easily deviated temporarily, and the probability of accidents is reduced. The top plate 8 and the frame 7 are detachably connected, so that the top plate 8 can be replaced after being deformed under stress. The frame 7 and the concrete sleeper 1 are integrally poured and formed, which can improve the connection tightness and will not easily separate, and will not damage the structural strength of the concrete sleeper 1.

[0034] In the embodiment, preferably, the frame 7 is symmetrically arranged on both sides of the two rail grooves 12, so that the top plate 8 abuts against both sides of each rail 11, and the limitation is improved.

[0035] In the further embodiment of the embodiment 2, the screw rod 9 is welded and fixed on the upper end of the frame 7, the through hole for the screw rod 9 to pass through is arranged on the top plate 8, and the nut 10 abutting against the end face of the top plate 8 is screwed on the screw rod 9.

[0036] The principle details of the embodiment are as follows:

[0037] After the concrete pillow 1 is poured, the upper end of the frame 7 is exposed, providing a mounting base for the top plate 8. A common detachable installation method is bolt fastening. Therefore, in this embodiment, since the frame 7 is a metal component, the fixing screw 9 can be directly welded to the upper end of the frame 7. The top plate 8 is V-shaped, and a through hole for the screw 9 is provided on the horizontal part of the top plate 8. After the screw 9 passes through the through hole, the nut 10 is tightened, and the nut 10 abuts against the end face of the top plate 8, thereby fastening the top plate 8 and achieving a detachable connection. The thread between the screw 9 and the nut 10 has self-locking properties to prevent the nut 10 from coming loose. Preferably, tightening a double nut 10 can enhance the anti-spinning performance.

[0038] Example 3, a further embodiment of this solution, refers to the appendix. Figure 3 As shown, the bottom end of the connection between the top plate 8 and the frame 7 is provided with a slot that mates with the upper end of the frame 7. The through hole that mates with the screw 9 is located in the center of the slot. During installation, the screw 9 is inserted into the through hole, the slot is fastened to the upper end of the frame 7, and the upper end of the frame 7 abuts against the top plate 8. Compared to relying solely on the screw 9 for blocking, this method reduces the stress load on the screw 9, avoids deformation of the screw 9 after long-term use, and also reduces the need for replacement after the screw 9 is damaged or deformed.

[0039] Example 4, a further embodiment of this solution, refers to the appendix. Figure 2 and attached Figure 3 As shown, the front of the frame 7 is I-shaped. After the concrete is poured, the groove 6 is also I-shaped. The lower side of the frame 7 is flared, which, in combination, increases the tightness of the connection between the frame 7 and the concrete pillow 1, preventing the end face of the concrete pillow 1 from loosening and causing the frame 7 to fall off.

[0040] In Example 5, a further embodiment of this solution, baffles 3 are welded and fixed to both ends of the reinforcing bars of the wire mesh cage 2, and the baffles 3 are embedded in both ends of the concrete sleeper 1. During pouring, the baffles 3 are embedded in the end faces of the concrete sleeper 1. The baffles 3 on both sides increase the tightness of the connection between the wire mesh cage 2 and the concrete sleeper 1, preventing lateral displacement; at the same time, it also facilitates the provision of protrusions on both ends of the mold cavity for placing the wire mesh cage 2.

[0041] In Example 6, a further embodiment of this solution, the prestressed steel strand 4 is provided in multiple forms, with at least two, to ensure sufficient prestress.

[0042] In Example 7, a further embodiment of this solution, the vertical cross-section of the concrete sleeper 1 is trapezoidal. This increases the load-bearing capacity and strength of the concrete sleeper 1 base surface.

[0043] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes to the technical solutions and the application concepts of the present application within the technical scope disclosed by the present application, and all of them should be covered within the protection scope of the present application.

[0044] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0045] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A reinforced concrete sleeper, characterized in that, The utility model provides a concrete sleeper (1) both ends of the concrete sleeper (1) are equipped with rail groove (12), and the concrete sleeper (1) is equipped with net cage (2) and prestressed steel strand (4), and the both ends of prestressed steel strand (4) are penetrated through concrete sleeper (1), and the both ends of prestressed steel strand (4) are connected with anchor device (5) that abuts against the both ends of concrete sleeper (1);The both ends of concrete are located in the side of two rail groove (12) and are equipped with frame (7), and the upper end of frame (7) extends the end surface of concrete sleeper (1), and the upper end of frame (7) is detachably installed with the top plate (8) that abuts against the side of wheel.

2. A reinforced concrete sleeper according to claim 1, characterised in that The upper end of frame (7) is welded with screw rod (9), and the top plate (8) is equipped with through hole for screw rod (9) to pass through, and the screw rod (9) is screwed with nut (10) that abuts on the end surface of top plate (8).

3. A reinforced concrete sleeper according to claim 2, characterised in that, The bottom end of the joint of top plate (8) and frame (7) is equipped with the clamping groove that cooperates with the upper end of frame (7).

4. A reinforced concrete sleeper according to claim 1, characterised in that, The frame (7) is in the shape of H.

5. A reinforced concrete sleeper according to claim 1, characterised in that, The both ends of the steel bar of net cage (2) are welded with baffle (3), and the baffle (3) is embedded in the both ends of concrete sleeper (1).

6. A reinforced concrete sleeper according to claim 1, characterised in that The prestressed steel strand (4) is equipped with multiple.

7. A reinforced concrete sleeper according to claim 1, characterised in that The vertical section of concrete sleeper (1) is in the shape of trapezoid.

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