JP2997902B2 - Track sound and vibration isolation floor structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound-proof and vibration-insulating floor structure for a track having an effect of preventing noise and vibration from propagating during traveling of a train.

[0002]

2. Description of the Related Art In a railway line, noise and vibration are generated by a train running on a rail. These noises and vibrations include two types: solid sounds in which vibrations propagate from rails through track floors and the like, and air sounds radiated from rails and the like directly into the air as noises. Conventionally, in order to prevent these noises and vibrations from propagating to buildings such as houses located near the railroad tracks, especially for solid sounds, rubber mats and old tires are interposed under the sleepers and the track floor. The absorption method is adopted.

[0003] In the case of such a noise reduction method, however, the emitted noise is reduced by about 5 to 10 dB, but the effect is not satisfactory in a building or the like where a building is built close to the track. Therefore, if it is particularly necessary,
A soundproof structure constructed by constructing a structural floor below the track floor, and floating the track floor on the structural floor with buffer materials made of inorganic fibers such as glass wool and rock wool interposed between the track floor and the structural floor Has been adopted.

[0004]

However, in the case of the sound-proof and vibration-proof structure using the above-mentioned cushioning material, the following problems have occurred. That is, when the vibration force applied from the track floor is large, the cushioning material is crushed and loses elasticity,
There is a problem that the buffer effect is lost if left for a long time. In addition, since the vibration is applied as a single resonance system to the vibration to which the cushioning material that is spread evenly is applied, its structure is simple for vibrations that propagate in multiple directions, and its dissipation effect is unsatisfactory. was there. In addition, for tracks installed on sloping ground, vibrations cause the track floor to move down the upper surface of the cushioning material, causing horizontal slippage. There is also a problem that the maintenance work is difficult. In addition, since the track floor is buried in the structural floor, it has been difficult to install a member for preventing horizontal slippage to cope with this problem except at the ends in the rail length direction.

[0005] As a result of the above-mentioned problems, the conventional soundproofing and vibration-proofing structure using a cushioning material has a dissatisfaction with the soundproofing effect. In some cases, the propagation of vibrations is unavoidable, causing problems in the living environment. In particular, the floor directly below the track has large noise and vibration to be propagated even when the soundproofing and vibration isolation method is employed, and it has been almost impossible to use it as a dwelling. In addition, in the case of designing a building for sound and vibration isolation in view of the above problem, the structure of the building becomes complicated and the construction period is extended, and the cost becomes enormous and the construction cost increases. However, the above-mentioned problem is not fundamentally solved.

On the other hand, since the elasticity of the inorganic fibers forming the cushioning material is extremely reduced when wet with water, the soundproofing effect is reduced when rainwater or groundwater penetrates. The cushioning material absorbs the vibration force by being compressed in response to the vibration when the vibration is applied.However, since the cushioning material is substantially closed under the track floor, the cushioning material is pushed out of the cushioning material with compression. In some cases, the trapped air stays between the track floor and the structural floor to bear the vibration force, and the vibration force is not sufficiently attenuated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has an effect of extending a replacement cycle of a cushioning material with respect to an applied vibration and preventing rainwater, groundwater, and the like from penetrating into the cushioning material, thereby improving a soundproofing effect. It is an object of the present invention to provide a sound and vibration proof structure of a track that is maintained well for a long time.

[0008]

In the sound-insulating and vibration-isolating floor structure for a track according to the present invention, a plurality of recesses are formed on the structural floor at one level lower than the upper surface of the structural floor at intervals along the direction of the track, and the floor is floated. A convex portion that fits into the concave portion of the structural floor is formed at the lower part of the floor, a first cushioning material is interposed between the concave portion and the convex portion, and a second cushion is provided between the upper surface of the structural floor and the lower surface of the floating floor. constructed by interposing a buffer material,
In addition, the first and second cushioning materials are mainly composed of inorganic fibers and have a vibration damping action, and one of them has a higher density than the other. Forming a projecting portion projecting toward the front and filling a water-stopping material filling the space between the lower surface of the projecting portion and the upper surface of the structural floor; and forming a pair parallel to the structural floor. A pair of waterproof walls extending in the longitudinal direction are formed at the upper part of the structural floor, and a cushioning material made of inorganic fibers is laid between the waterproofing walls and a strip of inorganic fibers is also formed on the upper surface of the stuffed cushioning material. that of the cushioning material was placed at intervals, it is placed in a further state of said floating <br/> bed having a fitting groove for fitting the waterproof wall fitted waterproof wall portion into the fitting groove Is a means for solving the above problem.

[0009]

According to the sound-insulating and vibration-isolating floor structure for a railway track according to the first aspect of the present invention, the vibration of the floating floor is supported by the first and second cushioning materials having different anti-vibration forces. As a result, when the applied vibration force is small, the cushioning material having the smaller vibration damping force acts, while when the vibration force is large, the vibration damping forces of both cushioning materials act to perform vibration damping.

[0010] According to the sound-insulating and vibration-isolating floor structure of the railroad line according to the second aspect, the overhanging portion is mounted on the upper surface of the structural floor to prevent rain or the like from directly entering the cushioning material. The water blocking material interposed between the upper surface and the overhanging portion can prevent water from entering the buffer material.

According to the third aspect of the present invention, the band-shaped cushioning material on which the floating floor is placed is continuously provided along the length of the line, and the space between the band-shaped cushioning materials is provided. Is formed with a space facing the side surface of the band-shaped cushioning material. This space communicates with the outside through the fitting groove, so that the air can move freely. When the vibration material is compressed and the cushioning material is compressed, the air pushed out of the cushioning material is freely discharged into the space between the cushioning materials, and the air communicates with the inside and outside of the floating floor and the structural floor. By freely entering and exiting through the fitting groove, the air does not bear the vibration force instead of the cushioning material.

[0012]

1 to 3 show a first embodiment of the present invention.
This will be described with reference to FIG. Reference numeral 10 in the figure is a line constituting the sound and vibration isolating floor structure of the line of the present embodiment. The track 10 is
A structural floor 11, a floating floor 13 supporting the rails 12 installed on the structural floor 11, a structural floor 11 and a floating floor 1
3, the first, second and third cushioning materials 14, 1
5 and 16.

On the structural floor 11, an upper surface 11a of the structural floor 11 is provided.
And a plurality of continuously arranged at predetermined intervals stage recessed allowed recess 11b formed on the isomorphic shape along the line 10 direction than. The concave portion 11b and the portion where the concave portion 11b is not formed are substantially equally spaced. The floating floor 13 is formed with a projection 13b that fits into the recess 11b of the structural floor 11 from the lower surface 13a and protrudes downward. As shown in FIG. 2, the upper surface of the floating floor 13 is placed in a floating floor installation groove 11c formed in the center of the structural floor 11.
1 is installed so as to be buried at a height substantially coincident with the upper surface.

As shown in FIGS. 2 and 3, a first cushioning member 14 for attenuating the vibration force of the floating floor 13 is interposed between the concave portion 11b and the convex portion 13b, and an upper surface 11a of the structural floor 11 is provided. A second cushioning member 15 is interposed between the first floor 13 and the lower surface 13a of the floating floor 13. As shown in FIG. 3, a third cushioning member 16 is provided between the first cushioning member 14 and the second cushioning member 15 to press both members in the vertical direction. Each of the first, second, and third cushioning members 14, 15, and 16 is mainly composed of an inorganic fiber such as glass wool 17, and has a vibration damping action. The first cushioning material 14 has a density of 50
Glass wool 17 is compression molded to about kg / m ³ . On the other hand, the second cushioning material 15 is made of glass wool 17
Is compression-molded to about 96 kg / m ^{3 which is} about twice as large as that of the first cushioning material 14. The third cushioning member 16 is formed similarly to the first cushioning member 14. And these first
The first and second cushioning members 14 and 15 absorb a small vibration force with the first cushioning material 14 and a large vibrational force with the second cushioning material 15, thereby forming a multi-resonant system. It is designed to exhibit anti-vibration action. The third cushioning member 16 urges the first cushioning member 14 and the second cushioning member 15 so as to be vertically separated from each other.

The sound-insulating and vibration-isolating floor structure of the track of the present embodiment configured as described above has a first cushioning member 14 and a second cushioning member 1.
Since the densities of the glass wools 17 forming the respective members 5 are different, the respective cushioning materials exhibit different vibration damping forces of the resonance system. Therefore, according to the soundproof and vibration-insulating floor structure of the track, the vibration of the floating floor 13 is supported by the first cushioning member 14 and the second cushioning member 15 having different vibration-damping forces, so that the applied vibration force is reduced. If it is small, the first with low vibration isolation
While the cushioning material 14 exerts a vibration damping force to perform vibration damping, when the vibration force is large, the vibration damping force of both the cushioning materials acts to perform vibration damping, so even if the vibration force is large. Appropriate vibration force is always applied to the first cushioning member 14 to reduce its crushing and extend its life, and it is also possible to exhibit a vibration damping ability corresponding to vibrations of various resonance systems.

Further, the structural floor 11 and the floating floor 13 are
Since the projections 1b and the projections 13b are provided in a combined state, the installation positions of the projections 1b and the projections 13b are fixed to each other, and there is no displacement in the length direction of the floating floor 13 due to vibration.

Hereinafter, a second embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. Reference numeral 20 in the figure is a line constituting a soundproof and vibration-insulating floor structure of the line of the present embodiment. Line 2
0 is different from the above-mentioned line 10 in that a floating floor 21 and its constituent parts, a putty set between the floating floor 21 and the structural floor 11 (water blocking material , reference numeral 22 ), and a structure 23 Only the floor and its constituent parts are provided, and the same constituent parts as those in FIGS. 1 to 3 in FIGS. 4 and 5 are denoted by the same reference numerals, and description thereof will be simplified.

As shown in FIG. 4, the floating floor 21 has a groove-like floating floor installation groove 23 formed in the center of the structural floor 23.
a floating floor main body 21a installed inside the floating floor main body 21a, and an overhang 2 protruding outward from both ends in the width direction of the floating floor main body 21a.
1b.

The floating floor main body 21a has the floating floor 1 at its lower part.
Same as 3 (that is, a plurality is formed at intervals in the line direction)
The same applies to the above ), and the projection 21e is provided in the floating floor installation groove 23a so that the lower half is buried. The upper part of the floating floor main body 21a is provided with a flat upper surface 21c and an inclined surface 21d which is inclined downward from the upper surface 21c to the tip of the overhanging portion 21b. It is designed to fall down. The rail 12 is fixed to the upper surface 21c.

As shown in FIG. 4, the overhang 21b is
The right and left sides of the upper part of the floating floor main body 21a protrude and extend from the both sides of the floating floor installation groove 23a to the overhanging portion mounting part 23b formed to protrude upward. The lower surface of the overhang portion 21b and the upper surface of the overhang portion mounting portion 23b are each formed flat. And, between the overhang portion 21b and the overhang portion placement portion 23b, a putty 22 having a waterproof property is filled to prevent the precipitation from entering the inside from the space between the floating floor 21 and the structural floor 23. I have.

The structural floor 23 is provided with the floating floor installation groove 23a.
The overhang portion mounting portion 23b and the concave portion 23cEquipped
You. Outside the overhang portion mounting portions 23b, 23b,
A drain ditch 23d for discharging precipitation is formed.
Between the convex portion 21e and the concave portion 23c,1Cushioning material 1
4Is laid, and both sides of the floating floor body 21a
The third cushioning material 16 is provided between the floating floor installation grooves 23a.
It is interposed.For the first and third cushioning members 14 and 16
The installation state of the second cushioning material 15 is the same as that of the first embodiment.
(Not shown).

According to the sound-insulating and vibration-isolating floor structure of the track configured as described above, the precipitation falling on the floating floor 21
1d flows down toward the tip of the overhang portion 21b, and then flows into the drain groove 23d to be discharged out of the track. The precipitation that has flowed down to the tip of the overhang portion 21b falls along the outer surfaces of the overhang portion 21b and the overhang portion placement portion 23b. There is no permeation into the interior from between the portions 23b.

Therefore, according to the sound-insulating and vibration-isolating floor structure of the track of this embodiment, since the space between the overhang portion 21b and the overhang portion mounting portion 23b is sealed by the putty 22, the first cushioning member 14 and the 2 buffer material 15 and 3rd buffer material 1
Since the water such as rainwater does not permeate into 6, the vibration damping effect of each of the first, second and third cushioning members 14, 15 and 16 can be maintained well even in rainy weather.

As shown in FIG. 5, the sound-insulating and vibration-isolating floor structure of the track constructed as described above is installed in a tunnel constructed by excavating the ground T and applied to a subway track. In this case, the same effect can be obtained with respect to water that falls from the tunnel ceiling or springs from the side, and noise and the like in the tunnel can be reduced.

Hereinafter, a third embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. Reference numeral 30 in the figure is a line constituting the sound and vibration proof floor structure of the line of the present embodiment. As shown in FIG. 6, the track 30 includes a structural floor 31 extending in the length direction of the track 30, a floating floor 32 placed on an upper central portion of the structural floor 31, and the structural floor 31 and the floating floor 32. And a buffer section 33 formed between them.

As shown in FIGS. 6 and 7, a pair of waterproof walls 31a are formed on the structural floor 31 so as to protrude upward from the upper surface of the pair of waterproof walls 31a extending in the length direction of the line 30 in parallel. ing. Each of the waterproof walls 31a, 31a has a rectangular shape that is vertically long in cross section, and the buffer portion 33 is formed at a portion on the inner surface side opposed to both sides. In addition, as shown in FIG. 7, a floating floor 32 is installed on the upper part of the buffer 33.

As shown in FIG. 7 and FIG.
Is a plate-shaped member extending in the length direction of the line 30, having outer wall portions 32a covering the waterproof wall portions 31a, 31a from the outside at both ends in the width direction in cross section, and inner surfaces of the outer wall portions 32a, 32a. rectangular cross section groove-shaped fitting groove 32b becomes formed near. And floating floor 3
2, on the upper part of the structural floor 31, the outer walls 32a, 32a cover the waterproof walls 31a, 31a from outside thereof,
In addition, it is installed above the buffer portion 33 by placing the fitting groove 32b on the waterproof wall portions 31a, 31a so as to be fitted from above.

As shown in FIG. 6 and FIG.
Is a fourth cushioning material 33a laid at the bottom between the waterproof walls 31a, 31a, and a band-shaped fifth cushioning material provided at a predetermined interval above the fourth cushioning material 33a. 33b. The fourth buffer material 33a and the fifth buffer material 33b are both formed by compacting the glass wool 17 to a predetermined density, similarly to the second buffer material 15. As shown in FIG. 6, the fifth cushioning member 33b is formed in a rectangular shape in a plan view, and as shown in FIG. 8, is connected to the fourth cushioning member 33a at intervals substantially equal to its own width. Has been established. Further, at both ends in the longitudinal direction of the fifth cushioning member 33b, which are in contact with the inner wall surfaces of the waterproof walls 31a, 31a, the side surfaces of the floating floor 32 and the waterproof walls 31a, 31a when the floating floor 32 is installed. A sixth cushioning member 33c interposed between the inner side surfaces and absorbing the horizontal vibration force of the floating floor 32 protrudes upward along the outer wall portions 32a, 32a.

The space between the fifth cushioning members 33b, 33b,... Is formed in an exhaust space 33d sandwiched between the lower surface of the structural floor 31 and the upper surface of the fourth cushioning member 33a. As shown in FIG. 7, the floating floor 32 is connected to a fourth cushioning material 33a.
The fitting groove 32b is placed on the waterproof wall portion 31a
Since the ventilation portion 33e is formed slightly above and between the waterproof wall portion 31a and the fitting groove 32b, the exhaust space 33d is formed.
Communicates with the outside through the ventilation part 33e.

The operation of the line 30 constituting the sound and vibration isolating floor structure of the line of the present embodiment will be described below. The line 30 is
When an exciting force acts on the floating floor 32, the fourth, fifth, and sixth
The cushioning members 33a, 33b, 33c are deformed to absorb the vibration force. For example, the fourth, fifth, and sixth cushioning members 33a, 33c
When a compressive force acts on 3b, 33c, the fourth, fifth, and sixth cushioning members 33a, 33b, 33c discharge the air therein to the exhaust space 33d with deformation. Then, the air in the exhaust space 33d is discharged to the outside of the line 30 without staying in the exhaust space 33d via the ventilation part 33e, so that the fourth, fifth, and sixth cushioning members 33a, 33b, 3
The exhaust from the exhaust space 3c to the exhaust space 33d is performed smoothly, and the fourth, fifth, and sixth cushioning members 33a, 33b, and 33c are exhausted.
Properly shrinks to efficiently absorb the vibration force.

The fourth, fifth, and sixth cushioning members 33a,
When the air bubbles 33b, 33c expand again after being compressed, the fourth, fifth, and sixth cushioning materials 33a, 33b, 33c suck air in the exhaust space 33d corresponding to the expanded volume.
In this case, similarly to the case where the air is discharged from the inside, the air flows freely into the exhaust space 33d through the ventilation portion 33e, so that the fourth, fifth, and sixth cushioning members 33a, 33b, The expansion of 33c is performed smoothly.

Therefore, according to the sound-insulating and vibration-isolating floor structure of the track of this embodiment, the floating floor 32 is connected to the fourth cushioning member 33a and the fifth cushioning member.
, The fourth, fifth, and sixth cushioning materials 33a, 33b, and 33c support the floating floor 32.
And the fourth, fifth and sixth cushioning members 33a, 33b, 33c,
Is installed inside the waterproof wall portions 31a, 31a, and the floating floor 32 is attached to the waterproof wall portions 31a by the outer wall portions 32a, 32a.
a and 31a are installed on the structural floor 31 so as to cover them from outside, so that the entire buffer 33 is covered and
3 can be prevented from flooding, such as rainwater, so that the fourth, fifth, and sixth cushioning members 33a, 33b, and 33c have the same vibration-damping effect as the sound-proof and vibration-isolating floor structure of the track of the second embodiment. Well maintained.

The sound-insulating and vibration-isolating floor structure of the track has the fourth, fifth, and sixth cushioning members 3 associated with contraction and expansion because the exhaust space 33d communicates with the outside through the ventilation portion 33e.
Since the air of 3a, 33b, and 33c is freely discharged and sucked, the fourth, fifth, and sixth cushioning members 33a, 33b, and 33c are freely deformed in response to the exciting force from the floating floor 32. Thus, even in a low frequency region of, for example, 10033 Hz or less, it is possible to further improve the vibration damping effect by 10 to 20 dB as compared with the sound-proof and vibration-damping floor structure of the conventional line.

[0034]

As described above, according to the sound-insulating and vibration-isolating floor structure for a railway track of the first aspect of the present invention, the structural floor is provided with a concave portion which is one step lower than the upper surface of the structural floor along the line direction. A plurality of protrusions are formed at intervals, and a lower portion of the floating floor is formed with a convex portion that fits into the concave portion of the structural floor. A first cushioning material is interposed between the concave portion and the convex portion to float the upper surface of the structural floor. A second cushioning material is interposed between the floor and the lower surface of the floor, and the first and second cushioning materials are mainly composed of inorganic fibers and have a vibration damping action, and one of the cushioning materials has one. It is characterized by having a higher density than the other, so that each cushioning material having a different density exerts a different vibration damping force of a different resonance system. While the cushioning material exerts vibration damping force, the vibration damping force of the other cushioning material acts when the vibration force is large In addition to improving the overall anti-vibration ability by antivibration Te, it can exhibit an anti-vibration capability corresponding to the vibration of various resonance system. Further, since the structural floor and the floating floor are provided in a state in which the concave portion and the convex portion are combined, the installation positions of both are fixed to each other, so that there is no shift in the length direction of the floating floor due to vibration.

In addition, according to the sound-insulating and vibration-isolating floor structure of the track according to the second aspect of the present invention, outwardly projecting projections are formed on both left and right sides of the floating floor. Since it is characterized by filling a water-stop material between the lower surface and the upper surface of the structural floor to fill these spaces, the water-stop material seals the space between the overhang and the upper surface of the structural floor where the overhang is placed. This prevents water from infiltrating into the interior and eliminates infiltration into each cushioning material, and improves the vibration damping effect of these cushioning materials even in locations where rainwater hits open areas or subways, etc. This has the effect that it can be held.

In addition, according to the third aspect of the present invention, a pair of waterproof wall portions extending in the longitudinal direction of the line are formed in pairs parallel to the structural floor. Formed on the upper part of the floor, spread the cushioning material made of inorganic fibers between the waterproof walls, and install the band-shaped cushioning material also made of inorganic fibers on the upper surface of the spread cushioning material at intervals,
Further, the track floor provided with the fitting groove to be fitted to the waterproof wall portion of the cushioning material is placed in a state where the waterproof wall portion is fitted to the fitting groove. The space formed in the space communicates with the outside through the ventilation part, so that the cushioning material can freely contract and expand and discharge and inhale the air. It is possible to freely deform and absorb, so that the vibration isolating effect can be further improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a first embodiment of the present invention.

FIG. 2 is the front sectional view.

FIG. 3 is an enlarged side sectional view.

FIG. 4 is a front sectional view showing a second embodiment of the present invention.

FIG. 5 is a front sectional view showing the embodiment provided in a subway tunnel.

FIG. 6 is a partial perspective view showing a third embodiment of the present invention.

FIG. 7 is the front sectional view.

FIG. 8 is a side sectional view of the above.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Line 11 Structural floor 11a Upper surface 11b Concave part 12 Rail 13 Floating floor 13a Lower surface 13b Convex part 14 1st buffer material 15 2nd buffer material 17 Glass wool (inorganic fiber) 20 Line 21 Floating floor 21b Overhanging part 21e Projecting part 22 Putty (Water stoppage material) 23 structural floor 23c concave portion 30 track 31 structural floor 31a waterproof wall 32 floating floor 32b fitting groove 33a fourth cushioning material 33b fifth cushioning material (band-like cushioning material) 33e ventilation part

Claims (3)

(57) [Claims] 1. A sound and vibration isolating structure for a track comprising a structural floor and a floating floor which is a track floor that supports a rail when installed on the structural floor, wherein the structural floor has a structure from the top of the structural floor. The recesses that are recessed by one step are spaced along the line direction
A plurality of protrusions are formed at the lower part of the floating floor, the protrusions being fitted to the recesses of the structural floor, a first cushioning material is interposed between the recesses and the protrusions, and the upper surface of the structural floor and the floating floor are provided. A second cushioning material is interposed between the lower surface and the first and second cushioning materials. The first and second cushioning materials are mainly composed of inorganic fibers and have a vibration damping action. A sound-insulating and vibration-isolating floor structure for railway tracks characterized by a high density. 2. An overhanging portion is formed on each of the left and right sides of the floating floor so as to protrude outward, and a waterproof material filling the space between the lower surface of the overhang and the upper surface of the structural floor. The sound and vibration isolating floor structure for a railway track according to claim 1, wherein the floor is filled. 3. A pair of waterproof walls extending in the length direction of the track in a pair parallel to the structural floor are formed on the upper part of the structural floor, and a cushioning material made of inorganic fiber is provided between the waterproof walls. Laying and installing a band-shaped cushioning material made of the same inorganic fiber on the upper surface of the cushioning material which has been spread, and further installing the waterproofing material.
Soundproofing proof Fuyuka structure of the line, characterized by comprising placing a floating floor with a fitting groove to be fitted to the wall portion in a state of fitting the waterproof wall portion into the fitting groove.