JPH057701U - Sound and vibration isolation floor structure with dynamic vibration absorber for railway - Google Patents

Abstract

(57) [Summary] [Structure] The cushioning material 4 is placed on the upper surface 32 of the structural floor 3 excluding the pit 31, the floating raceway floor 2 is placed on this, and the weight 5 floats on the lower surface of the raceway floor 2. It is suspended by a spring 6 and stored in the pit 31. [Effect] Even if the vibration of the train 7 is transmitted to the rail 1 via the wheels 8 and strong vibration and noise (solid sound) energy is propagated to the floating track floor 2 fixing the rail 1, this vibration energy is The weight 5 is consumed to resonate and is quickly attenuated. Moreover, since it is difficult for the energy of vibration to be transmitted to the structural floor 3 that is placed oppositely via the cushioning material 4, the structural floor 3 does not vibrate violently or propagate a large amount of noise.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a floor structure used in a railway station or the like.

[0002]

[Prior art]

  When trains pass at high speeds, loud noise and violent vibrations occur. Also, with departure Noise and vibration are generated even when the vehicle is stopped. Train noise is high speed It also comes out when the car body deflates air, but the contact sound between the wheel and the rail, that is, the friction sound, It is the main one, and it makes a lot of noise, especially when the vehicle body is shaking significantly. So Then, a part of this fricative sound is directly radiated and propagated in the air, and a part of it is rails and track floors. , Is propagated through the building frame. Solid sound propagating through rails, etc. Have taken measures to reduce this by laying rubber mats and old tires on the sleepers and under the track. However, the reduction effect is only about 5 dB to 10 dB at most. The effect of alleviating is also small.

[0003]

[Problems to be solved by the device]

  For this reason, trains can be placed inside or adjacent to buildings, such as subway stations. If you are laying a track, or if you have a room adjacent to the track, Noise and vibration during an emergency are large like under the guard (especially on the floor directly below), offices, etc. However, there was a problem that it was difficult to use.   Therefore, it is possible to effectively reduce noise and vibration when trains pass by. There was a strong expectation for an effective floor structure.

[0004]

[Means for Solving the Problems]

  The present invention has been made to solve the above-mentioned problems of the prior art. Damping device for railway, characterized by having cushioning material sandwiched between it and the structural floor installed in the building It is a soundproof and vibration-isolated floor structure with cushioning material sandwiched between the track floor and the structural floor installed below. In addition, the weight is suspended on the lower surface of the track floor via a spring. It is a soundproof and vibration-isolating floor structure with a dynamic vibration absorbing device for railways, which consists of a track floor and a structural floor installed below. A cushioning material is sandwiched between them, and a weight is attached to the upper surface of the structural floor via a cushioning material or spring. To provide a soundproof and vibration isolation floor structure with a dynamic vibration absorbing device for a railway characterized by being installed as Is.

[0005]

[Action]

  Train vibration is transmitted via the wheels to the rail, track floor, and structural floor in that order, and The frictional noise generated between the rail and rail also propagates in the order of rail, track floor, and structural floor. Since the track floor on which the roof is laid and the structural floor below it are installed via a cushioning material, Only part of the energy of vibration and noise (solid sound) transmitted to the orbit floor is Not transmitted to the structural floor. Moreover, in the floor structure of the second invention, the vibration energy of the track floor is reduced. The ghee is consumed to resonate the weight and is quickly attenuated, and the floor of the third invention is In the structure, the vibration energy of the structural floor resonates the weight and quickly attenuates it. Noise and vibration are difficult to be transmitted to the structural floor even when a train passes by.

[0006]

【Example】

  (Example 1)   Referring to FIG. 1 illustrating the first embodiment, 1 is a rail and 2 is a floating gauge. Roadbed, 3 is a structural floor, and 4 is a cushioning material.

[0007]   The floating track floor 2 is, for example, a reinforced concrete slab material with a thickness of 30 to 60 cm. And, for example, on the structural floor 3 constructed by reinforced concrete, If it is placed via a cushioning material 4 such as glass wool (board) with a thickness of 10 to 30 cm Has been.

[0008]   By adjusting the spring constant of the cushioning material 4, the vertical natural vibration of the floating track floor 2 is adjusted. It is designed so that the frequency is about 20 Hz or less.

[0009]   In the floor structure having the above structure, the rails 1 laid on the upper surface of the floating track floor 2 are lined up on the rails 1. When the car 7 passes, the vibration of the train 7 is transmitted to the rail 1 via the wheels 8, and A friction noise is generated between the wheel 8 and the rail 1, and the floating gauge that fixes the rail 1 Energy of strong vibration and noise (solid sound) is transmitted to the roadbed 2.

[0010]   However, the floating track floor 2 and the structural floor 3 function to reduce the frequency of the floating track floor 2. Since they are vertically opposed to each other via the cushioning material 4 having the vibration, the vibration transmitted to the floating track floor 2 is The dynamic and solid sound energy is hard to be transmitted to the structural floor 3 below, and the energy of the floating orbital floor 2 is spread. Even if the train sways on the installed rail 1 at high speed, the structural floor 3 vibrates violently. It does not move or propagate a loud solid sound. Therefore, the energy absorber Noise (solid noise) is 2 compared to the conventional floor structure in which the cushioning material 4 having the function is not sandwiched. It is significantly reduced to 0 to 30 dB.

[0011]   (Example 2)   The second embodiment will be described with reference to FIG. 2. The upper surface of the structural floor 3 has a predetermined size. Pits 31 are provided at predetermined intervals, and the upper surface 32 of the structural floor 3 excluding the pits 31 The cushioning material 4 made of glass wool having a thickness of 10 to 30 cm, for example, is placed on the For example, a floating track floor 2 having a thickness of 30 to 60 cm is placed.

[0012]   A weight 5 is suspended by a spring 6 on the lower surface of the floating track floor 2, and the weight of the structural floor 3 is picked up. Each of the doors 31 is installed and stored so as not to come into contact with each other. weight The weight of 5 is about 1/5 to 1/10 of the floating track floor 2 per unit area, and The spring constant of the spring 6 is selected so that the natural frequency in the direction is within 63 ± 3Hz. There is.

[0013]   In the floor structure having the above configuration, when the train 7 passes over the rail 1, The vibration is transmitted to the rail 1 via the wheel 8 and friction between the wheel 8 and the rail 1 is generated. Sound is generated, and strong vibration and noise are generated on the floating track floor 2 that fixes the rail 1. Rugies are transmitted.

[0014]   Since the peak frequency of solid noise from trains is often around 63 Hz, The energy of the solid sound propagating to the roadbed 2 is the natural frequency in the vertical direction due to the spring 6. Is adjusted within 63 ± 3Hz to resonate the suspended weight 5 and quickly reduce it. Decline. Moreover, the floating track floor 2 is connected to the structural floor 3 via the cushioning material 4 made of glass wool. Since they are arranged opposite to each other, it is difficult to transmit the vibration of the floating track floor 2 to the structural floor 3.

[0015]   Therefore, the train 7 swings on the rail 1 laid on the floating track floor 2 at high speed. Even if it passes by, the lower structural floor 3 vibrates violently and a large noise (solid sound) is transmitted. No seeding, so noise (solid sound) is 20 dB to 30 compared to the conventional floor structure. It is significantly reduced to dB.

[0016]   (Example 3)   The third embodiment will be described with reference to FIG. 3. The weight 5 is the pit 31 of the structural floor 3. Is stored and stored via a cushioning material 4a such as glass wool (board). That The other structure is the same as that of the second embodiment.

[0017]   In this case, the weight of the weight 5 is ⅕ to the weight of the structural floor 3 per unit area. Cushioning material so that the natural frequency in the vertical direction is within 63 ± 3 Hz. The density of 4a is adjusted.

[0018]   In the floor structure having the above configuration, when the train 7 passes over the rail 1, Vibration is transmitted to the rail 1 via the wheels 8, and the floating track that fixes this rail 1 Vibrate floor 2.

[0019]   However, the floating orbital floor 2 and the lower structural floor 3 are provided with a cushioning material 4 made of glass wool. As a result, only a part of the vibration energy of the floating track floor 2 is transmitted to the structural floor 3. The vibration of the structural floor 3 is much higher than that of the floating track floor 2 because it does not reach small. Moreover, the weight 5 is vertically provided on the upper surface of the structural floor 3 via the cushioning material 4a. The density is adjusted so that the natural frequency of is within 63 ± 3Hz. Even the slight vibration energy transmitted to the structural floor 3 is extinguished in order to resonate the weight 5. It is expended and quickly attenuated, the structural floor 3 vibrates violently, and loud noise (solid noise) Since it does not propagate, the noise (solid sound) is 20 dB ~ compared to the conventional floor structure. Significantly reduced to 30 dB.

[0020]   It should be noted that the present invention is not limited to the above-mentioned embodiment, and is based on the gist of the invention. Therefore, various variations are possible. For example, used as a cushioning material in the examples. In addition to fibrous cushioning materials such as glass wool (board) and rock wool (board), Rubber or urethane foam can be used. Place weight 5 on top of structural floor 3 The cushioning material 4a is the same as the cushioning material 4 installed between the floating track floor 2 and the structural floor 3. The cushioning material 4a may be provided between the floating raceway floor 2 and the weight 5 as the cushioning material 4a. A part of the vibration energy of the floating orbital floor 2 is directly transmitted to the weight 5 and absorbed. It is also possible to store.

[0021]

[Effect of device]

  As described above, according to the floor structure of the present invention, the structural structure caused by the vibration of the train is Install a quiet room below the track as body vibration and noise will be significantly reduced. It is possible to significantly increase the degree of freedom when constructing station buildings such as subways. Therefore, it has a great effect on the effective use of land.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment.

FIG. 2 is an explanatory diagram showing a second embodiment.

FIG. 3 is an explanatory diagram showing a third embodiment.

[Explanation of symbols]

1 rail 2 floating track floor 3 structural floor 31 pits 4 cushioning material 4a cushioning material 5 weights 6 spring 7 trains 8 wheels

Claims (3)

[Scope of utility model registration request] 1. A sound-proof and vibration-proof floor structure with a dynamic vibration absorbing device for a railway, wherein a cushioning material is sandwiched between a track floor and a structural floor installed below. 2. A dynamic vibration absorber for a railway characterized in that a cushioning material is sandwiched between a track floor and a structural floor installed below, and a weight is suspended on the lower surface of the track floor via a spring. Soundproof and anti-vibration floor structure. 3. A railway use characterized in that a cushioning material is sandwiched between a track floor and a structural floor installed below, and a weight is arranged on the upper surface of the structural floor via a cushioning material or a spring. Sound and vibration isolation floor structure with dynamic vibration absorber.