KR20070087585A - Concrete sleeper and method for the production thereof - Google Patents

Abstract

Disclosed is a concrete sleeper for great dynamic loads with rail supporting areas (2) and a lower base zone. Said concrete sleeper is made of a high-strength standard concrete (4) that absorbs great pressure. The rail supporting areas (2) and/or the lower base zone is/are made of a wear-resistant, non-abrasive, or tension-proof material.

Description

Concrete sleepers and its manufacturing method {CONCRETE SLEEPER AND METHOD FOR THE PRODUCTION THEREOF}

The present invention relates to a concrete sleeper for high dynamic loads made of high-strength standard concrete that can withstand high compressive forces and having a rail support surface and a lower rail area.

At high dynamic loads, wear and / or corrosion often occur within the rail support surface and on the underside of the concrete sleepers. This wear is caused by the plastic layer inserted between the concrete body of the concrete and the rail or by the conversion of particles in the ballast bed under the concrete sleeper. This wear phenomenon can also occur due to braking of very long trains (used in the United States and Australia) that can reposition welded rails by a few millimeters, for example, resulting in substantially corresponding wear to concrete sleepers. .

In the case of oscillating vertical loads, the plastic layer also expands and contracts in the horizontal direction, thereby rubbing against the concrete surface of the sleeper. On the bottom of the concrete sleeper, the gravel particles again rub against the concrete body. This removes material at the rail support and on the bottom of the concrete body. As a result, the geometry and transport capacity of the concrete sleepers are sufficiently damaged over time that can no longer be fixed as a safe, stable support element.

 It is therefore an object of the present invention to provide a concrete sleeper of the type mentioned in the background art herein which prevents wear properties at minimal cost.

To this end, according to the invention, the rail support surface and / or the lower base plate region are made of a wear resistant, friction resistant or tensile resistant material.

Moreover, the present invention relates to a method of manufacturing a concrete sleeper of the type described above.

According to the present invention, wear resistant, friction resistant or tonic resistant materials are inserted into a sleeper mold below or above standard concrete as prefabricated plates or profiles and adhere to each other upon curing.

Abrasion resistant, frictional or tensile resistant materials can be inserted, for example, as metal angles.

According to a variant embodiment of the invention, depending on the type of placement in the sleeper, abrasion, friction or toughness material is first inserted into the sleeper mold as a specific concrete material and then the standard concrete is injected into the sleeper mold or vice versa In particular, the specific concrete is introduced into the sleeper mold as a top layer to form a wear resistant and friction resistant base plate, which is abrasion resistant, abrasion resistant or in a wet-on-wet fashion with standard concrete in the sleeper mold. It may be provided by adhering and curing the tolerant material.

According to the present invention, in the present method, by directly introducing different plastic concrete materials in a wet-on-wet manner, the standard concrete and the specific concrete material are shaken or vibrated to form a unitary body so that the standard concrete and the specific concrete material have their boundaries. While mixed with one another in the region, one has some different bending tensile strength or wear resistance above its height.

As a variant, in the method according to the invention, a preferably prefabricated plate made of plastic is used, which plate is inserted into the concrete mold in liquid or plastic form and in this state forms an adhesion with the concrete.

Other advantages and details of the present invention will become apparent from the following several examples and drawings.

1 and 2 are cross-sectional views of a sleeper mold for producing a concrete sleeper according to the present invention having a wear-resistant rail support surface, in which different deformations are shown left and right,

3 and 4 are longitudinal cross-sectional views of sleeper molds at two different filling stages for the production of concrete sleepers according to the invention with wear- and / or friction-resistant materials in the bottom plate area of the concrete sleepers;

5 and 6 are longitudinal cross-sectional views of sleeper molds in the manufacture of the concrete sleepers of the present invention having high tensile strength in the lower base plate area;

7-9 are cross-sectional views of sleeper molds at various stages of the manufacture of concrete sleepers exposed at the center of the upper surface with high tensile stress.

In FIG. 1, the sleeper mold 1 is shown to have an area formed to form the rail support surface 2. In order to increase the wear and friction resistance in the region of these rail support surfaces 2 which act as supports in the case of high dynamic, oscillating vertical loads, as shown on the right side of FIG. It can be inserted before filling with sleeper concrete, as shown on the left of 1, or a first concrete layer 3 'made of abrasion and friction resistant materials can be applied. The mold is then filled with standard sleeper concrete 4 as shown in FIG. 2. In this case, the prefabricated component, in this case the steel angle 3, is glued in the pressure resistant standard concrete 4, or the two types of concrete are bounded by vibration and vibration as shown on the left. Are mixed to form a monolith, but one has some different wear and friction resistance above that height.

In Figures 3 and 4, a method of making sleepers having high wear and friction resistance in the lower base plate area is shown. To this end, the first standard concrete 4 is injected into the sleeper mold 1 with only a slight layer thickness at the top, and then the wear and / or frictional resistance of the standard concrete 4 is less dry. Apply a layer of concrete 3 ".

In the embodiment according to FIGS. 5 and 6, the production of sleepers for rail sections where high tensile forces occur in the lower regions of the concrete sleepers is shown. First, as before, a standard concrete (4) with high pressure resistance is injected into the sleeper mold (1) up to half the height of the sleeper, and then a specific concrete (3 '") with high tensile strength is applied to the sleeper mold (1). By injecting, compressing and vibrating again, a single bond of the two types of concrete is achieved in the boundary region.

Finally, FIGS. 7-9 show an embodiment prepared for the case of centering a concrete sleeper as manufactured in FIGS. 5 and 6, with the result that additional tensile stresses occur on the upper surface of the center. It becomes possible. To this end, first, a tolerant concrete layer 3 "" is applied as a first concrete layer in the center of the sleeper mold 1, and then a conventional standard concrete 4 is injected into the sleeper mold 1. Then, as in FIGS. 5 and 6, the tensile resistance specific concrete 3 ′ ″ is injected as another concrete layer.

The invention is not limited to the illustrated embodiment. According to the different use of specific types of concrete and tolerant concrete of wear or friction resistance, a variant of increasing the tensile strength according to FIGS. 5 to 9 is a variant in which high wear resistance is achieved as shown in FIGS. It can be combined with the example.

Claims (9)

In a high dynamic load concrete sleeper, having a rail support surface (2) and a lower base plate area, made of high-strength standard concrete (4) capable of withstanding high compressive forces, Concrete rail sleeper, characterized in that the rail support surface (2) and / or the lower base plate area is made of a wear-resistant, friction-resistant or tensile resistant material. The method of claim 1, The wear-resistant, friction-resistant or tensile-resistant material is a concrete sleeper characterized in that it is a prefabricated plate or profile or metal angle, in particular steel angle (3). The method according to claim 1 or 2, The concrete sleeper characterized in that the wear resistant, friction resistant or tensile resistant material is a concrete layer (3 ', 3 "") and / or specific concrete (3 ", 3'") bonded to the standard concrete (4). In the method of manufacturing a high dynamic load concrete sleeper made of standard concrete (4) of high strength capable of withstanding high compressive force, and having a rail support surface (2) and a lower base plate area, The rail support surface 2 and / or the lower base region are inserted into a sleeper mold 1 below or above the standard concrete 4 as a prefabricated plate or profile and wear resistant to adhere to the standard concrete upon curing. Method for producing a concrete sleeper, characterized in that made of a frictional or tensile resistance material. The method of claim 4, wherein A method for producing a concrete sleeper, characterized in that the metal angle, in particular the steel angle (3), is inserted as a wear resistant, friction resistant or tensile resistant material. The method of claim 4, wherein The wear-resistant, friction-resistant or tensile-resistant material as a first concrete layer 3 ', 3 "" and / or a specific concrete 3 ", 3'" is wetted in the sleeper mold 1 in the standard concrete A method for producing a concrete sleeper, characterized in that it is bonded to (4) and cured. The method of claim 6, A method of producing concrete sleepers, characterized in that different types of concrete are sequentially injected into the sleeper mold (1) and mixed in the boundary region by shaking or vibration to form a monolith. The method of claim 4, wherein A method for producing a concrete sleeper, characterized in that it uses a preferably prefabricated plate of plastic material. The method of claim 8, The plate is injected into the sleeper mold (1) in the form of a liquid or a plastic, and in that state forms a concrete sleeper, characterized in that for forming an adhesive part.

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