JPH0892901A - Concrete sleeper with tabular elastic body and manufacture thereof - Google Patents

Abstract

PURPOSE: To keep the spring constant of a tabular elastic body at a fixed value, and to improve durability by preventing the intrusion of gravel and water to a bonding surface by fast sticking and bonding the tabular elastic body onto the bottom of a concrete sleeper without an air reservoir. CONSTITUTION: Tabular elastic bodies 2 are mounted on a concrete sleeper 1 through fixing materials 7, and the shape of a surface section, on which the tabular elastic bodies 2 are brought into contact with the bottom section of the concrete sleeper 1, is formed in inclined valley surfaces 4 while air vent holes 5 are formed near the bottoms of the inclined valley surfaces 4 of the tabular elastic bodies 2. The concrete sleeper 1 with the tabular elastic bodies is manufactured in such a manner that the tabular elastic bodies 2 are used, concrete is placed from the opening of the top face of forms for the sleeper formed so that the bottom of the sleeper is directed as the top face, and the mounting sides of the fixing materials 7 are directed downwards and the tabular elastic bodies 2 are pressed against the top face of the placed concrete from the top face of the forms. The fixing materials 7 are pushed into placed concrete while air in placed concrete is pushed out, guided to the inclined valley surfaces 4 of the tabular elastic bodies 2 and discharged from the air vent holes 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents the diffusion of vibrations caused by the running of a railway vehicle, and prevents the sleepers from sinking on a crushed stone floor.
The present invention relates to a concrete sleeper with a plate-like elastic body, which prevents rail subsidence, further reduces track deviation, and ensures environment improvement and economically safe operation of a vehicle, and a manufacturing method thereof.

[0002]

2. Description of the Related Art When laying railway rails, crushed stones are laid down to a thickness of about 250 mm on a foundation ground or a concrete foundation, concrete sleepers are lined up on it, and rails are further laid on it. . When a train runs at high speed on the rails laid in this way, its vibration and noise are transmitted to the surroundings and harm the environment.At the same time, the vibration causes the crushed stones under the sleepers to move and the crushed stones to become finer. As a result, the sleepers sink and the rails sink further. Repairing these fine particles and subsidence often involves work at night when the train is out of service, and a large track maintenance cost is incurred. Conventionally, in order to prevent these problems, a plate-shaped elastic material has been attached to the bottom of concrete sleepers, or a nut has been inserted into ready-mixed concrete, and after hardening of the concrete, a plate-shaped elastic material with holes. The method of attaching the bolts is used.

[0003]

Conventionally, various elastic bodies such as urethane series, natural rubber series, synthetic rubber series, elastic plastic series and recycled rubber series have been used as the plate-like elastic body of the concrete sleeper with elastic body. . In order to attach these plate-like elastic bodies to concrete sleepers, they can be roughly classified into the following three types. (1) A solid plate-like elastic body and a solid concrete sleeper are separately prepared, and the two are bonded by an adhesive material or a screw. (2) A mold having a space is formed outside the solid concrete sleepers, and a liquid elastic material is poured into the spaces to make the solid elastic, and at the same time, the elastic is bonded to the concrete sleepers. (3) After projecting a plurality of fixing materials on the plate-like elastic body, the plate-like elastic body is arranged at a predetermined position on the upper surface of the concrete formwork of the sleeper, and concrete is placed in the concrete formwork, Each fixing material is embedded in the cast concrete to connect the plate-like elastic body and the concrete sleepers.

In the connection type (1) above, in order to improve the connection state, various examinations such as improvement of the adhesive, surface treatment of the adhesive surface of the elastic body and concrete, improvement of the adhesion environment, improvement of the mounting shape, etc. However, there is a problem in that the adhesive force still varies and a lot of man-hours are required. In the connection type of (2) above, it is necessary to pour a liquid elastic material into a predetermined shape, but it is necessary to accurately form a mold for securing the shape, and to remove the mold. It is uneconomical because it requires a lot of man-hours for the work. In the connection type (3), since the plate-like elastic body is arranged in the upper opening of the concrete form, the number of steps is relatively small and it is economical. However, air retention tends to occur on the contact surface between the fresh concrete and the plate-like elastic body, which makes the spring constant of the elastic body unstable, and gravel or water may enter between them to deteriorate durability. There was a problem. Therefore, the present invention makes it possible to create a concrete sleeper with a plate-like elastic body with good workability, eliminate air retention between the elastic body and the concrete sleeper, stabilize the spring constant, and improve durability. The purpose is to do.

[0005]

According to the present invention, the heads of a plurality of fixing materials are vulcanized and bonded to a plate-like elastic body having a vibration-proof function,
The above object is achieved in a concrete sleeper in which the other end of the fixing material is embedded in a concrete sleeper and a plate-like elastic body is attached to the bottom of the sleeper. Therefore, the plate-shaped elastic body attached to the bottom of the concrete sleeper forms the shape of the surface part in contact with the bottom of the concrete sleeper into an inclined valley surface corresponding to a flat inverted pyramid, an inverted cone, and the like. An air vent hole was provided near the bottom of the inclined valley surface of the body. Further, the bottom surface of the concrete sleeper has a shape corresponding to the inclined valley surface of the plate-like elastic body. In the method of manufacturing a concrete sleeper with a plate-like elastic body, a plurality of fixing materials to be embedded in the concrete sleeper are projected on the plate-like elastic body attached to the bottom of the concrete sleeper, and an appropriate number of air vent holes are provided. . Then, concrete is placed from the top opening of the concrete formwork created so that the top surface of the concrete sleeper is facing down, and then the above plate-like elastic body is pressed against the top surface of the concrete formwork to press it into a plate shape. The fixing material provided on the elastic body is embedded in the poured concrete, and the air in the poured concrete is extracted from the air vent hole of the plate-shaped elastic body, so that the plate-shaped elastic body and the concrete sleepers are connected. In the above-mentioned manufacturing method, the plate-like elastic body is formed into a shape of a surface portion in contact with the bottom of the concrete sleeper, and is formed into an inclined valley surface corresponding to a flat inverted pyramid, an inverted cone, and the inclination of the plate-like elastic body. An air vent hole was provided near the bottom of the valley. Further, while the plate-like elastic body was vibrated by a vibrating machine, the fixing material was pushed into the pouring concrete and the air in the pouring concrete was pushed out.

[0006]

In the concrete sleeper with a plate-like elastic body of the present invention, the fixing material is firmly vulcanized and bonded to the plate-like elastic body, and the other end of the fixing material is embedded in the concrete sleeper. The binding state of is strong. Also, the surface of the plate-like elastic body that contacts the concrete sleepers is formed as an inverted trough with an inverted pyramid or inverted cone shape, and an air vent hole is provided near the bottom of it, so it can be placed on a concrete sleeper formwork. When the plate-like elastic body is pressed against the concrete, the air in the poured concrete is guided to the sloped valley surface and exits through the air vent hole, and the air is interposed between the plate-like elastic body and the concrete sleepers. It can be brought into close contact without being forced to do so. Therefore, the spring constant of the plate-like elastic body can be maintained at a predetermined value, and gravel, water, etc. can be prevented from entering between them. In the method of manufacturing a concrete sleeper with a plate-like elastic body, after placing concrete in the concrete formwork of the sleeper, the plate-like elastic body is pressed against the top surface of the cast concrete to provide the plate-like elastic body. The fixed member is pushed into the pouring concrete, and at the same time, the air in the pouring concrete is extracted to the outside through the air vent hole. Therefore, after the concrete is hardened, if it is taken out from the form, there can be obtained a concrete sleeper in which air does not remain on the joint surface and the plate-like elastic bodies are firmly joined.
In addition, if the plate-like elastic body is pressed against the placed concrete while vibrating by the vibrator, the fixing material can be quickly and efficiently pushed into the fresh concrete and the air in the concrete can be extracted. .

[0007]

Embodiments of the present invention will be described with reference to FIGS.
The concrete sleeper 1 having the rail seat surface 1a on the upper surface is
By attaching the plate-like elastic body 2 to the bottom surface, vibration and load changes caused by running of the railway vehicle are dampened and buffered, and the crushed stone base 3 moves, becomes finer, and sinks, causing the sleeper to sink and the rail to go wrong. Can be prevented. The plate-like elastic body 2 is made of natural rubber, synthetic rubber, recycled rubber, urethane rubber,
It is made of elastic plastic, etc., has a spring constant suitable for vibration isolation during vehicle traveling, and in the present embodiment, it is formed in a rectangular shape that can cover the bottom surface of each end except the central part of the sleeper, You may integrally form in the shape which can cover the whole bottom part of a sleeper.

The upper surface of the plate-like elastic body 2, that is, the surface in contact with the concrete sleeper 1, has an inclined valley surface 4 forming a flat inverted pyramid.
An air vent hole 5 is formed near the bottom of the inclined valley surface 4 so as to penetrate the plate-shaped elastic body 2. The bottom surface of the concrete sleeper 1 has a flat inclined surface corresponding to the inclined valley surface 4 of the plate-like elastic body 2. In this embodiment, one plate-like elastic body 2 is provided with three air vent holes 5 as shown in FIG. 3, but the number of air vent holes 5 is not limited thereto. The inclined valley surface 4 provided on the plate-like elastic body 2 may have a pyramid shape other than the quadrangular pyramid shape, or may have a conical shape. Then, when the plate-like elastic body 2 is pressed against the fresh concrete placed in the formwork for the sleeper and pressed, the air in the placed concrete is guided to the inclined valley surface 4 and can be extracted to the outside from the air vent hole 5. Has become.
Further, a ridge 6 is provided on the edge of the upper surface of the plate-like elastic body 2 excluding the central side of the sleepers, and a recess is formed in the base thereof, so that the plate-like elastic body 2 is hard to come off when embedded in the concrete sleeper 2. are doing.

On the surface of the plate-like elastic body 2 in contact with the concrete sleeper 1, a suitable number of substantially bolt-shaped fixing members 7 having their heads 7a vulcanized and bonded are projected. The projecting portion is embedded in the concrete of the concrete sleeper 1 so that the plate-like elastic body 2 is firmly connected to the concrete sleeper 1. The head 7a of the fixing member 7 is formed to have a larger diameter than the protruding portion, and the portion of the plate-like elastic body 2 to which the head 7a is bonded is formed in the shallow recess 2a as shown in FIG.
Each fixing member 7 is arranged at each apex of the boundary line of each inclined valley surface 4 of the plate-like elastic body 2, but the position is not limited to those positions and may be a position buried on the concrete sleeper side. Good. Further, the fixing material 7 is formed of a general-purpose metal such as aluminum or stainless steel or a synthetic resin, and a protruding portion embedded in the concrete sleeper is provided with a screw groove or unevenness so as to be hard to come off.

When manufacturing a concrete sleeper with a plate-like elastic body, the above-mentioned fixing material 7, inclined valley surface 4 and air vent hole 5 are used.
The plate-like elastic body 2 provided with the above is used, and as shown in FIG. 6, a mold 8 having an open top and a sleeper shape is used. The upper surface of the formwork 8 is the underside of the sleepers, and the outer peripheral portion of the formwork 8 is reinforced by the reinforcing material 9. In this form 8, a high-clay, ready-mixed concrete 10 containing gravel is placed from the top opening. Then, before the ready-mixed concrete 10 hardens, the plate-like elastic body 2 is pressed against the surface of the ready-mixed concrete on the upper surface of the form 8 with the fixing material 7 side thereof facing down.
In this state, by pressing the plate-like elastic body 2 against the placing concrete in the form 8, each fixing material 7 can be pushed into the ready-mixed concrete, and at the same time, the air in the placing concrete is pushed out and the air is removed from the plate. Sloped surface 4 of elastic body 2
And pull out to the outside from the air vent hole 5, and the plate-like elastic body 2 is brought into close contact with the concrete sleeper 1 to be joined.
Then, after the poured concrete is hardened, it is taken out from the mold 8 to complete a concrete sleeper in which the plate-like elastic body 2 is firmly bonded to the concrete sleeper 1 as shown in FIG. 7.

In order to quickly and efficiently press the plate-like elastic body 2 against the poured concrete to push in the fixing material 7 and extract the air from the poured concrete, as shown in FIG. Thus, the plate-shaped elastic body 2 is pressed against the poured concrete 10. In that case, the vibration plate 12 is interposed between the vibration generator 11 and the plate-shaped elastic body 2.
Vibration at the time of excitation is from around 10,000 cpm to 30,000 cpm,
By applying a slight vibration to the plurality of fixing members 7 of the plate-like elastic body 2, it is possible to push the plurality of fixing members 7 into the fresh concrete with a weak force, and by vibrating the fresh concrete and the plate-like elastic body. The interval between 2 and 2 is repeatedly changed, and the air pressure at the interface fluctuates, so that the air staying at the interface can be effectively extracted.

In the above-mentioned embodiment, the plate-like elastic body 2 is attached to the concrete sleeper, but it can be similarly applied to the case where the plate-like elastic body 2 is attached to other concrete products such as car stops. Further, the plate-like elastic body 2 is not limited to the elastic material, and can be similarly applied to the case where a resin plate having a protrusion is attached to concrete.

[0013]

According to the present invention, the fixing material firmly fixed to the plate-like elastic body by vulcanization adhesion can be embedded in the concrete sleepers and can be firmly connected, and the rust from the joint portion does not easily occur, and the plate-like elasticity can be obtained. The air inside the concrete can be sufficiently extracted from the air vent hole of the body, so the spring constant of the plate-like elastic body is kept at a predetermined value, and the connection is strong without gaps, so gravel etc. Harder and more durable. Further, in order to bond the plate-like elastic body to the concrete sleeper by the production method of the present invention, the plate-like elastic body may be simply pressed against the ready-mixed concrete cast in the formwork for the concrete sleeper, so that an extra mold is separately provided. It does not require a frame or the like, and can be manufactured by both the conventional PC sleeper preten and posten methods, and can be easily and economically manufactured.
Also, when pressing the plate-like elastic body against the fresh concrete, the air in the fresh concrete is sufficiently extracted from the air vent holes of the plate-like elastic body, so that air does not remain on the joint surface, the spring constant is kept good, and the durability is improved. It becomes a concrete sleeper with good properties.

[Brief description of drawings]

FIG. 1 is a front view showing a half of a concrete sleeper with a plate-like elastic body manufactured according to the present invention.

FIG. 2 is a side view of a concrete sleeper with a plate-like elastic body.

FIG. 3 is a perspective view of a plate-shaped elastic body.

FIG. 4 is a partial cross-sectional view of the front of the concrete sleeper with a plate-like elastic body.

FIG. 5 is a partial cross-sectional view of a plate-shaped elastic body to which a fixing material is adhered.

FIG. 6 is an explanatory view showing a method of manufacturing a concrete sleeper with a plate-like elastic body.

FIG. 7 is a sectional view of a completed concrete sleeper with a plate-like elastic body.

FIG. 8 is an explanatory diagram of a case where a concrete sleeper with a plate-like elastic body is manufactured using a vibration exciter.

[Explanation of symbols]

 1 Concrete sleepers 2 Plate-like elastic body 4 Inclined valley surface 5 Air vent hole 7 Fixing material 8 Formwork 11 Exciter

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shoichi Kobayashi 5-46-2 Maebaru East, Funabashi City, Chiba Prefecture (72) Shoichi Mitsui 35-4 Machiyamachi, Kanazawa-ku, Yokohama City, Kanagawa Prefecture

Claims (4)

[Claims] 1. A plate-like elastic body having an anti-vibration function, a head of a plurality of fixing materials is vulcanized and adhered, and the other end of the fixing material is embedded in a concrete sleeper to form the plate-like elastic body in the bottom of the sleeper. A concrete sleeper attached to, wherein the shape of the surface portion of the plate-like elastic body in contact with the bottom of the concrete sleeper is formed into an inclined valley surface corresponding to a flat inverted pyramid or an inverted cone. An air vent hole is provided near the bottom of the sloped valley surface, and the bottom surface of the concrete sleeper has a shape corresponding to the sloped valley surface of the plate-shaped elastic body. 2. A plate-like elastic body attached to the bottom of a concrete sleeper is provided with a plurality of fixing members to be embedded in the concrete sleeper, and an appropriate number of air vent holes are provided so that the upper surface of the concrete sleeper is lower. The concrete provided from the top opening of the concrete formwork that was created as follows, and then the above plate-like elastic body is pressed and pressed from the top surface of the concrete formwork to fix it to the plate-like elastic body. The plate-like elasticity is characterized in that the plate-like elastic body and the concrete sleeper are joined together by burying the material in the poured concrete and extracting the air in the poured concrete from the air vent holes of the plate-like elastic body. Method of manufacturing concrete sleepers with a body. 3. The shape of the surface portion of the plate-like elastic body in contact with the bottom of the concrete sleeper is formed into an inclined valley surface corresponding to a flat inverted pyramid or an inverted cone, and the inclination of the plate-like elastic body is formed. The method of manufacturing a concrete sleeper with a plate-like elastic body according to claim 2, wherein an air vent hole is provided near the bottom of the valley surface. 4. The elastic material is pushed by a vibrating machine while the fixing material is pushed into the pouring concrete, and the air in the pouring concrete is pushed out.
For manufacturing concrete sleepers with plate-like elastic bodies.