JP3058373B2 - Method of manufacturing track slab having sound absorbing layer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a track slab having a sound absorbing layer to be installed on a trackbed of a railway.

[0002]

2. Description of the Related Art Conventionally, as measures to prevent noise generated from a train running on a slab track, (1) a method of installing soundproof walls on both sides of the slab track, (2) laying a rubber plate under the slab track. And so on.

[0003]

In the case of the above-mentioned method (1), installation of a soundproof wall requires a large amount of cost, and in the case of the above-mentioned method (2), the noise absorption effect is small and the rubber Since the plate is expensive, there is a drawback that the cost is high and the durability period is short.

[0004]

SUMMARY OF THE INVENTION In order to advantageously solve the above-mentioned problems and to easily manufacture a track slab having the sound absorbing layer, a method for manufacturing a track slab having a sound absorbing layer according to the present invention is described. After a plurality of rail fastening base forming mold members 6 are fixed on the bottom plate 5 of the mold frame 4, a sound absorbing material is cast at a lower portion in the mold frame 4 to form the sound absorbing material layer 3. After removing the mold 6, concrete is poured into the mold 4 to form the concrete track slab body 1 and the concrete rail fastening base 2.

[0005]

1 and 2 are produced by the method of the present invention .
FIG. 2 shows a track slab 7 having a sound absorbing layer formed thereon, in which a plurality of concrete rail fastening bases 2 having a flat upper surface are provided on an upper part of a concrete track slab main body 1.
The rail slab body is provided integrally with the rail slab body at intervals in the longitudinal direction, and the rail fastening bases 2 are provided so as to be arranged in two rows. A layer 3 is provided, and an embedding plug 8 for screwing a bolt of a rail fastening device is embedded in the rail fastening base 2.

[0006] As the fiber-reinforced lightweight cellular concrete, a foam composed of a number of independent gas chambers produced by using a foaming agent solution and fibers such as vinylon fiber, carbon fiber and glass fiber are mixed into mortar or concrete. Used at room temperature and pressure. When fibers such as vinylon fiber, carbon fiber, and glass fiber are mixed into the lightweight cellular concrete, the bending strength of the sound absorbing material layer 3 made of the lightweight cellular concrete increases, and the sound absorbing material layer 3
However, it is hard to be broken and is hard to be broken.

Next, a method for manufacturing the track slab 7 having the sound absorbing layer will be described. First, as shown in FIG. 3, a plurality of rail fastening base forming dies 6 are placed on a box-shaped form 4 having a flat bottom plate 5 in two rows at intervals.
After each mold 6 is fixed to the bottom plate 5 with a nail or the like, a sound absorbing material made of fiber-reinforced lightweight cellular concrete is poured into the lower portion of the mold 4 and cured to form the sound absorbing material layer 3.

Next, after removing the mold member 6 to obtain the state shown in FIG. 4, as shown in FIG. 5, a plurality of embedding plugs 8 are fixed to the bottom plate 5 at the mold member removing position in the mold frame 4. And a reinforcing bar 9 is arranged in the formwork 4 and then concrete is poured into the formwork 4 as shown in FIG. The rail fastening base 2 is formed. After curing the concrete, it is removed from the mold and turned over to the state shown in FIG. When the track slab 7 having the sound absorbing layer is manufactured as described above,
Since the sound absorbing material layer 3 is integrated with the track slab body 1, there is no need to fix the sound absorbing material layer 3 to the track slab body 1 with an adhesive, and one formwork 4 is used to have the sound absorbing layer. The track slab 7 can be manufactured, and since the track slab body 1 and the sound absorbing material layer 3 are integrated, the sound absorbing material layer 3 can be protected from being damaged by the track slab body 1 and transported. it can. Manufactured by the method of the present invention.
For track slabs with a sound absorbing layer
On the upper part of the track slab body 1, a plurality of concrete
Of the track slab body in the longitudinal direction of the track slab body.
And a sound absorbing material is provided on the upper surface of the track slab body 1.
Since the layer 3 is provided, the noise generated by the running train
Absorbed by the sound absorbing material layer 3 and loud noise diffuses around
Can be prevented, and of the track slab body 1
Since it is only necessary to provide the sound absorbing material layer 3 on the upper surface,
Can be manufactured economically, and the track construction site
It is economical because there is no need to install soundproof walls
Noise is lower than laying a rubber plate under the track slab.
Excellent sound absorption and long-term durability
You.

[0009]

According to the method for manufacturing a track slab having a sound absorbing layer of the present invention, a plurality of rail fastening base forming dies 6 are fixed on the bottom plate 5 of the form 4 and then the inside of the form 4 is fixed. A sound absorbing material is cast in the lower part to form the sound absorbing material layer 3,
Is removed, concrete is poured into the formwork 4 to form the concrete track slab body 1 and the concrete rail fastening base 2, so that the track slab 7 having the sound absorbing layer can be easily manufactured. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a track slab having a sound absorbing layer manufactured by the method of the present invention.

FIG. 2 is an enlarged longitudinal side view showing a part of a track slab having a sound absorbing layer.

FIG. 3 is a longitudinal sectional front view showing a state in which a rail fastening base forming mold is fixed to a mold and a sound absorbing material is cast.

FIG. 4 is a vertical sectional front view showing a state where a rail fastening base forming mold material is removed from a mold frame.

FIG. 5 is a longitudinal sectional front view showing a state in which a sound absorbing material layer is provided in a mold and reinforcing bars are arranged.

FIG. 6 is a longitudinal sectional front view showing a state where concrete forming a track slab body and a rail fastening base is cast into a mold provided with a sound absorbing material layer.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 track slab main body 2 rail fastening base 3 sound absorbing material layer 4 formwork 5 bottom plate 6 rail fastening base forming mold 7 track slab having sound absorbing layer 8 embedding plug 9 rebar

Continued on the front page (72) Inventor Hirofumi Toriumi 3-12-8, Teraoka, Izumi-ku, Sendai-shi, Miyagi (72) Inventor Masamichi Tezuka 25-5, Oyadaicho, Moka-shi, Tochigi (72) Inventor Koji Niitani Tochigi 13-7 Check 1 102, Daimachi, Moka-shi (72) Inventor Tomoyoshi Nakajo 3-11-9, Sekido, Tama-shi, Tokyo (56) References JP-A-49-57505 (JP, A) JP-A-3-125701 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) E01B 19/00 E01B 37/00

Claims (1)

(57) [Claims] After a plurality of rail fastening base forming mold members are fixed on a bottom plate of a mold frame, a sound absorbing material is poured into a lower portion of the mold frame to form a sound absorbing material layer. Next, a method of manufacturing a track slab having a sound absorbing layer for forming concrete track slab body 1 and concrete rail fastening base 2 by casting concrete in form 4 after removing mold member 6 and then forming concrete.