Expansion joint of rail road

Abstract

The present invention relates to a railway expansion joint device. The invention comprises: two concrete structures positioned at a distance from each other; an expansion sealing member inserted between the two concrete structures to accommodate the expansion of the concrete structures and to seal the space between the two concrete structures; a ballast layer stacked on the upper surface of each of the two concrete structures; an elastic sealant filled between the ballast layers and covering the space between the two concrete structures; a cover plate covering the elastic sealant; and a plate fixing member that fixes one end of the cover plate to one of the two concrete structures so that the cover plate moves according to the expansion of the two concrete structures and covers the elastic sealant. According to the present invention, the durability of the concrete structures is enhanced by preventing leakage between the concrete structures that support live loads caused by trains and repeatedly expand and contract due to temperature changes.

Description

Technology Field

[0001] The present invention relates to a railway expansion joint device. Background Technology

[0002] Generally, a railway bridge consists of a superstructure that supports loads such as the live load of a train, rails, ballast, or ballast concrete, and a substructure that supports the superstructure. The superstructure consists of concrete bridge slab(s) that support loads such as the live load of a train, rails, ballast, or ballast concrete, and girders that support the bridge slabs, while the substructure consists of piers and abutments on which the girders are installed.

[0003] The superstructure undergoes repeated expansion and contraction due to live loads from trains and temperature changes in the concrete structures, which are the bridge slabs; to accommodate this expansion and contraction, expansion joints are installed between the bridge slabs, which are the concrete structures of the superstructure, with gaps between them.

[0004] Korean Utility Model Publication No. 20-2009-0002410 (published on March 10, 2009) (hereinafter referred to as the prior art) discloses a configuration in which a sealing material for sealing is combined between two concrete floor plates corresponding to a bridge slab, an elastic sealing material is installed on the sealing material, and an elastic plate is covered on the upper surface of the elastic sealing material.

[0005] However, the prior art has a problem in that when the square rod-shaped sealing material repeatedly expands and contracts due to the expansion and contraction of two concrete floor slabs, the sealing material can easily separate between the concrete floor slabs, causing rainwater to leak between the concrete floor slabs and reducing the durability of the concrete floor slabs that support live loads from trains and undergo repeated expansion and contraction. Prior art literature

[0006] Republic of Korea Registered Patent No. 10-1306266 (Published September 17, 2013) Republic of Korea Published Patent No. 10-2006-0055162 (Published May 23, 2006) The problem to be solved

[0007] The objective of the present invention is to provide a railway expansion joint device that enhances the durability of concrete structures by preventing leakage between concrete structures that support live loads from trains and repeatedly expand and contract due to temperature changes. means of solving the problem

[0008] To achieve the objective of the present invention, a railway expansion joint device is provided, comprising: two concrete structures positioned at a distance from each other; an expansion sealing member joined between the two concrete structures to accommodate the expansion of the concrete structures and to seal the space between the two concrete structures; a track layer stacked on the upper surface of each of the two concrete structures; an elastic sealant filled between the track layers and covering the space between the two concrete structures; a cover plate covering the elastic sealant; and a plate fixing member that fixes one side of the cover plate to one of the two concrete structures so that the cover plate moves according to the expansion of the two concrete structures and covers the elastic sealant.

[0009] The above-described expansion sealing member comprises an intermediate plate portion positioned in a vertical direction, left and right plate portions positioned spaced apart on both sides of the intermediate plate portion, a left upper plate portion connecting the upper end of the intermediate plate portion and the upper end of the left plate portion, a right upper plate portion connecting the upper end of the intermediate plate portion and the upper end of the right plate portion, a left lower plate portion connecting the lower end of the intermediate plate portion and the lower end of the left plate portion, a right lower plate portion connecting the lower end of the intermediate plate portion and the lower end of the right plate portion, a plurality of serrated protrusions formed protruding at spaced intervals in a vertical direction on each outer surface of the left and right plate portions, and an adhesive filled between the serrated protrusions. It is preferable that the intermediate plate portion, the left plate portion, the left upper plate portion, and the left lower plate portion form a left space filled with compressed air, and the intermediate plate portion, the right plate portion, the right upper plate portion, and the right lower plate portion form a right space filled with compressed air.

[0010] It is preferable that the above elastic sealant includes a filling portion that is filled between the above-mentioned track layers, and an insertion projection portion that is formed protruding from the lower surface of the filling portion and inserted into the upper portion between the above-mentioned concrete structures. Effects of the invention

[0011] In this invention, an expansion sealing member is combined between two concrete structures, an elastic sealant covers the space between the two concrete structures and fills the space between the track layers, a cover plate covers the elastic sealant, and one side of the elastic sealant is fixed by a plate fixing member, thereby preventing water leakage between the two concrete structures through the expansion sealing member and the elastic sealant, which increases the durability of the concrete structures.

[0012] In addition, the expansion sealing member of the present invention is provided with serrated protrusions on each side and an adhesive is filled between each of the serrated protrusions. When the expansion sealing member is joined between concrete structures, the serrated protrusions on both sides of the expansion sealing member are attached to the end surfaces of the two concrete structures. This ensures that the expansion sealing member is inserted smoothly and is prevented from falling upward. Furthermore, multiple layers of adhesive are attached to the end surfaces of the concrete structures, enhancing adhesive performance and effectively preventing leakage downward through the gap between the two concrete structures. Brief explanation of the drawing

[0013] FIG. 1 is a cross-sectional view illustrating an embodiment of a railway expansion joint device according to the present invention. FIG. 2 is a cross-sectional view illustrating another example of an elastic sealant constituting an embodiment of a railway expansion joint device according to the present invention. FIG. 3 is a plan view illustrating another example of a cover plate through-hole constituting an embodiment of a railway expansion joint device according to the present invention. Specific details for implementing the invention

[0014] below, An embodiment of the railway expansion joint device according to the present invention will be described with reference to the attached drawings.

[0015] In describing the embodiments of the present invention, terms and words used in this specification and claims are defined in consideration of their functions in the embodiments of the present invention and should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe his invention, they must be interpreted in a meaning and concept consistent with the technical spirit of the present invention.

[0016] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application. Furthermore, it should be noted that matters not necessary to reveal the essence of the present invention, namely known configurations that a person skilled in the art with ordinary knowledge could obviously add, have not been illustrated or described in detail.

[0017] One embodiment of a railway expansion joint device according to the present invention As illustrated in FIG. 1, it includes two concrete structures (10), an expansion sealing member (20), a track layer (30), an elastic sealant (40), a cover plate (50), and a plate fixing member (60).

[0018] Two concrete structures (10) are spaced apart from each other.

[0019] The two concrete structures (10) may have the same shape as each other, or they may have different shapes.

[0020] The two concrete structures (10) can be parts of a railway bridge on which a railway rail is installed, parts of a track concrete constructed on the ground on which a railway rail is installed, etc.

[0021] In addition, the two concrete structures (10) may be parts of a general paved road, a general bridge, etc., on which vehicles travel.

[0022] The expansion sealing member (20) is inserted between two concrete structures (10) to accommodate the expansion of the concrete structures (10) and to seal the space between the two concrete structures (10). It is preferable that the expansion sealing member (20) be made of an elastic material. For example, the expansion sealing member (20) may be made of rubber or silicone. It is preferable that the width of the expansion sealing member (20) be equal to the distance between the two concrete structures (10).

[0023] As an example of an expandable sealing member (20), the expandable sealing member (20) comprises an intermediate plate portion (21), left and right plate portions (22) (23) spaced apart on both sides of the intermediate plate portion (21), a left upper plate portion (24) connecting the upper end of the intermediate plate portion (21) and the upper end of the left plate portion (22), a right upper plate portion (25) connecting the upper end of the intermediate plate portion (21) and the upper end of the right plate portion (23), a left lower plate portion (26) connecting the lower end of the intermediate plate portion (21) and the lower end of the left plate portion (22), a right lower plate portion (27) connecting the lower end of the intermediate plate portion (21) and the lower end of the right plate portion (23), a plurality of toothed protrusions (28) formed protruding vertically spaced apart on each outer surface of the left and right plate portions (22) (23), and filled between the toothed protrusions (28). Includes adhesive (29).

[0024] The intermediate plate (21) is positioned in a vertical direction. The intermediate plate (21) has a uniform height and length, and it is preferable that its thickness be uniform.

[0025] The left plate (22) and the right plate (23) are each positioned parallel to the middle plate (21), and it is preferable that their sizes correspond to the middle plate (21).

[0026] It is preferable that the angle between the outer surfaces of the left upper plate (22) and the right upper plate (23) is acute. As a result, the upper surface of the expansion sealing member (20) forms a V-shaped concave surface in the shape of a V-shaped groove.

[0027] It is preferable that the angle between the outer surfaces of the left lower plate (22) and the right lower plate (23) is obtuse. As a result, the lower surface of the expansion sealing member (20) forms a V-shaped convex surface with a V-shaped protrusion shape.

[0028] The serrated protrusions (28) provided on the outer surface of the left plate (22) are each bar-shaped and formed along the length of the left plate (22), with the ends of the protrusions facing upward. As a result, the adhesive material (29) filled between two adjacent serrated protrusions (28) does not flow downward but accumulates.

[0029] The serrated protrusions (28) provided on the outer surface of the right plate (23) are each bar-shaped formed along the length of the right plate (23), and the ends of the protrusions face upward. As a result, the adhesive material filled between two adjacent serrated protrusions (29) does not flow downward but accumulates.

[0030] A left space filled with compressed air is formed by the middle plate (21), left plate (22), left upper plate (24), and left lower plate (26). Both ends of the left space in the longitudinal direction are sealed. A right space filled with compressed air is formed by the middle plate (21), right plate (23), right upper plate (25), and right lower plate (27). Both ends of the right space in the longitudinal direction are sealed. An air injection part (not shown) and a valve (not shown) are provided on one side of the left upper plate (24) or the right upper plate (25), and a communication hole (not shown) is provided in the middle plate (21). When the valve of the expansion sealing member (20) is opened and compressed air is injected through the air injection part using a pump, the expansion sealing member (20) expands.

[0031] When joining the expansion sealing member (20) between two concrete structures (10), adhesive (29) is filled between the serrated protrusions (28) of the left and right plates (22) (23) of the expansion sealing member (20), and then the expansion sealing member (20) is positioned between the two concrete structures (10) with the left and right upper plates (24) (25) facing upward. Compressed air is injected into the left and right spaces of the expansion sealing member (20) to press the serrated protrusions (28) of the left and right plates (22) (23) against the ends of the two concrete structures (10), and the adhesive (29) between the serrated protrusions (28) is cured to adhere to the ends of the concrete structures (100). Afterward, the compressed air is removed from the left and right spaces of the expansion sealing member (20).

[0032] Since the expansion sealing member (20) is provided with serrated protrusions (28) on both sides, when the expansion sealing member (20) is joined between two concrete structures (10), it is not only easy to insert but also prevents it from coming off upward, and since multiple layers of adhesive (29) filled between each of the serrated protrusions (28) are adhered to the end surface of the concrete structure (10), the adhesive performance is improved and leakage is effectively prevented.

[0033] The top layer (30) is stacked on the upper surface of each of the two concrete structures (10).

[0034] As an example of the track layer (30), the track layer (30) is preferably concrete layered to a certain thickness on the upper surface of the concrete structure (10). As another example of the track layer (30), the track layer (30) may be asphalt layered to a certain thickness on the upper surface of the concrete structure (10). As yet another example of the track layer (30), the track layer (30) may be gravel layered to a certain thickness on the upper surface of the concrete structure (10).

[0035] The track layer (30) stacked on each of the two concrete structures (10) is formed with a gap corresponding to the gap between the two concrete structures (10), and the gap between two adjacent track layers (30) is larger than the gap between the two concrete structures (10), and it is preferable that the centerline of the gap between the two track layers (30) is located on the same line as the centerline of the gap between the two concrete structures (10). The upper surface of the end of the concrete structure (10) located between the end surface of the concrete structure (10) and the end surface of the track layer (30) is called the exposed surface.

[0036] The elastic sealant (40) is filled between the track layers (30) and covers the gap between the two concrete structures (10).

[0037] As an example of an elastic sealant (40), the elastic sealant (40) includes a filling portion (41) filled between the top layers (30) and an insertion projection portion (42) formed protruding from the lower surface of the filling portion (41) and inserted between the concrete structures (10).

[0038] The filling portion (41) is filled between the track layers (30) along the longitudinal direction between the track layers (30), and it is preferable that the thickness of the filling portion (41) be the same as the thickness of the track layer (30). That is, the lower surface of the filling portion (41) is in close contact with the exposed surface of the concrete structure (10). Both sides of the filling portion (41) are attached to or in close contact with the sides of the track layer (30), respectively. It is preferable that the upper surface of the filling portion (41) be flat. Meanwhile, as shown in FIG. 2, the upper surface of the filling portion (41) may be a concave curved surface with a concave middle portion in the width direction. It is preferable that the concave curved surface be formed in a uniform shape in the longitudinal direction. When the upper surface of the filling part (41) is a concave curved surface, the concrete structures (10) expand and press the sides of the filling part (41). At this time, the middle part of the filling part (41) becomes convex, and the concave upper surface becomes close to a flat surface, so the force pressing the cover plate (50) is weakened. Additionally, when the upper surface of the filling part (41) is a concave curved surface, rainwater can be drained through the concave curved surface when it flows between the cover plate (50) and the track layer (30) in a state where it is not fully pressed.

[0039] The insertion projection (42) is formed along the length direction of the filling portion (41), and its width is preferably equal to the spacing between the two concrete structures (10) so that the sides of the insertion projection (42) in the width direction are in contact with the ends of the two concrete structures (10). As another example, the insertion projection (42) may be provided with expansion slits at regular intervals in the length direction. The expansion slits penetrate the insertion projection (42) with a regular width in the width direction. In this case, when the insertion projection (42) is expanded by being pressed on both sides in the width direction, the volume being expanded is accommodated by the expansion slits, thereby minimizing the downward expansion force.

[0040] It is preferable that the lower surface of the insertion projection (42) comes into contact with the upper surface of the expansion sealing member (20). That is, if the upper surface of the expansion sealing member (20) is flat, the lower surface of the insertion projection (42) is flat, and if the upper surface of the expansion sealing member (20) is a concave curved surface, it is preferable that the lower surface of the insertion projection (42) is a convex curved surface formed to correspond to that shape.

[0041] Meanwhile, the lower surface of the insertion projection (42) may be a concave curved surface. When the lower surface of the insertion projection (42) is a concave curved surface, the two concrete structures (10) expand and press the sides of the insertion projection (42), causing the middle part of the insertion projection (42) to become convex and the concave upper surface to become close to a flat surface, thereby preventing the expansion sealing member (20) from being pressed from above.

[0042] The cover plate (50) covers the elastic sealant (40).

[0043] As an example of a cover plate (50), it is preferable that the cover plate (50) be a square plate. If the length in the vertical direction between the two concrete structures (10) is long, there may be multiple cover plates (50). It is preferable that the cover plate (50) be made of stainless steel.

[0044] The plate fixing member (60) fixes one side of the cover plate (50) to one of the two concrete structures (10) so that the cover plate (50) moves according to the expansion and contraction of the two concrete structures (10) and covers the elastic sealant (40).

[0045] As an example of a plate fixing member (60), the plate fixing member (60) includes an anchor bolt. When the plate fixing member (60) is an anchor bolt, a through hole (51) is formed on one side of the cover plate (50), and a screw hole (H) is formed on the upper surface of the concrete structure (10) or the upper surface of the track layer (30). The male threaded portion of the anchor bolt is fastened into the screw hole (H) while the anchor bolt passes through the through hole (51) of the cover plate (50). It is preferable that the through hole (51) formed in the cover plate (50) be circular. As shown in FIG. 3, the through hole (51) of the cover plate (50) may be formed as an elongated hole with a length greater than its width. In this case, the movement of the cover plate (50) becomes freer.

[0046] below, The operation and effects of the railway expansion joint device according to the present invention are explained.

[0047] An adhesive is applied to each of the two sides of the expansion sealing member (20), and the expansion sealing member (20) with the applied adhesive (29) is inserted between two concrete structures (10) to attach the two sides of the expansion sealing member (20) to the end surfaces of the two concrete structures (10). At this time, while the expansion sealing member (20) is positioned between the two concrete structures (10), air is injected into the expansion sealing member (20) to expand the expansion sealing member, thereby attaching the two sides of the expansion sealing member to the end surfaces of the two concrete structures and curing the adhesive. Subsequently, a track layer (30) is stacked on each of the upper surfaces of the two concrete structures (10), with the stacking formed to have a larger gap than the gap between the two concrete structures (10). Next, an elastic sealant (40) is filled between the track layers (30) to cover the gap between the two concrete structures (10). At this time, if the track layer (30) is asphalt or concrete, the end of the track layer (30) adjacent to the gap between the two concrete structures (10) is cut vertically and then the elastic sealant (40) is filled in; if the track layer (30) is gravel, a partition plate is positioned adjacent to the gap between the two concrete structures (10) and then the elastic sealant (40) is filled between the partition plates. Next, the elastic sealant (40) is covered with a cover plate (50), and one side of the cover plate (50) is fixed with a plate fixing member (60).

[0048] In this way, the present invention prevents water leakage between the two concrete structures (10) by means of the expansion sealing member (20) and the elastic sealant (40) covering the space between the two concrete structures (10) and filling the space between the track layer (30), and the cover plate (50) covers the elastic sealant (40) and one side of the elastic sealant (40) is fixed by the plate fixing member (60), thereby maintaining high durability of the concrete structures (10).

[0049] In addition, the expansion sealing member (20) of the present invention is provided with serrated protrusions (28) on each side and an adhesive (29) is filled between each of the serrated protrusions (28). When the expansion sealing member (20) is joined between concrete structures (10), the serrated protrusions (28) on both sides of the expansion sealing member (20) are attached to each end surface of the two concrete structures (10), so that when the expansion sealing member (20) is joined, not only is insertion smooth, but it is also prevented from falling upward, and multiple layers of adhesive (29) are attached to the end surfaces of the concrete structures (10) to increase the adhesive performance and effectively prevent leakage downward through the two concrete structures (10). Explanation of the symbols

[0050] 10; Concrete structure 20; Expansion sealing member 30; Top layer 40; Elastic sealant 50; Cover plate 60; Plate fixing member

Claims

Claim 1 Two concrete structures positioned at a distance from each other; an expansion sealing member joined between the two concrete structures to accommodate the expansion of the concrete structures and to seal the space between the two concrete structures; a track layer stacked on the upper surface of each of the two concrete structures; an elastic sealant filled between the track layers and covering the space between the two concrete structures; and a cover plate covering the elastic sealant. A railway expansion joint device comprising a plate fixing member that fixes one side of the cover plate to one of the two concrete structures so that the cover plate moves according to the expansion and contraction of the two concrete structures and covers the elastic sealant, wherein the elastic sealant comprises a filling portion filled between the ballast layers and an insertion projection formed protruding from the lower surface of the filling portion and inserted into the upper portion between the concrete structures, wherein the upper surface of the filling portion is formed as a concave curved surface with high ends in the width direction and a concave middle portion so that rainwater is drained when the filling portion is not pressed from both sides in the width direction and the cover plate is not pressed when the filling portion is pressed from both sides in the width direction, and the lower surface of the insertion projection is formed as a concave curved surface with high ends in the width direction and a concave middle portion so that the upper surface of the expansion sealing member is not pressed when the insertion projection is pressed from both sides in the width direction. Claim 2 A railway expansion joint device according to claim 1, wherein the expansion sealing member comprises an intermediate plate portion positioned in a vertical direction, left and right plate portions positioned spaced apart on both sides of the intermediate plate portion, a left upper plate portion connecting the upper end of the intermediate plate portion and the upper end of the left plate portion, a right upper plate portion connecting the upper end of the intermediate plate portion and the upper end of the right plate portion, a left lower plate portion connecting the lower end of the intermediate plate portion and the lower end of the left plate portion, a right lower plate portion connecting the lower end of the intermediate plate portion and the lower end of the right plate portion, a plurality of serrated protrusions formed protruding at spaced intervals in a vertical direction on each outer surface of the left and right plate portions, and an adhesive filled between the serrated protrusions, wherein the intermediate plate portion, left plate portion, left upper plate portion, and left lower plate portion form a left space filled with compressed air, and the intermediate plate portion, right plate portion, right upper plate portion, and right lower plate portion form a right space filled with compressed air. Claim 3 A railway expansion joint device according to claim 1, characterized in that the ballast layer is one of concrete, asphalt, or gravel. Claim 4 delete

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