JP2006008455A - Vibration reducing material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration reducing material which has excellent vibration transmission reducing function and can easily be mounted in a building. <P>SOLUTION: The vibration reducing material 1 is formed by using an elastic material or a rubber chip which is the elastic material and sand as main materials and kneading with asphalt as a binder and remarkably reduces the transmission of the vibration to the building 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a novel vibration reducing material used for a vibration reducing method for a building or the like.

  For example, when a new subway line or railway line is constructed in an urban area, it is usually constructed near an existing building due to land restrictions. In such a case, there have been reports of cases in which damage to vibration, solid sound, and noise, which was difficult to predict immediately before construction, affects the surrounding environment of existing buildings.

Among the damage caused by the solid sound and noise caused by the impact of the train traveling on the subway line, the noise damage due to the vibration in the solid sound frequency region having a peak in the 63 Hz band is a problem.
As measures against such problems, methods such as attaching rubber plates to the side and bottom of buildings are adopted, but problems such as construction is not easy and costs rise. Therefore, establishment of new measures is desired.

Patent Document 1 proposes a building foundation structure having a structure in which a rubber sheet for vibration damping is laid on the lower part of a concrete foundation body in order to reduce traffic vibration to an apartment house or the like.
However, in the case of the foundation structure of the building of this Patent Document 1, a rubber sheet is laid on the bottom of the hole provided in the support ground, and concrete is placed thereon to construct the foundation main body. Application to buildings is difficult.
JP 2001-31705 A

  Conventionally, the present invention has excellent vibration transmission in the technical field of this type in view of the fact that there is no vibration reduction material that has excellent vibration transmission reduction performance and can be easily installed in existing buildings. An object of the present invention is to provide a vibration reducing material that can be easily constructed by various methods while having reduced performance.

  The vibration reducing material of the present invention is mainly composed of rubber chips (for example, tire chips), which are elastic materials, synthetic resin foam beads (for example, polystyrene foam), etc. and earth and sand, and asphalt, straight asphalt, asphalt emulsion, or the like is kneaded as a binder. The main feature is that it is a vibration reducing material.

The present invention has the following effects.
According to the inventions of claims 1 to 3, since the rubber chip and earth and sand which are elastic materials or elastic materials are the main materials, the asphalt or straight asphalt which is a binder is kneaded into a vibration reducing material, Asphalt or straight asphalt type vibration reducing material having excellent vibration transmission reduction performance can be provided.

  According to the invention described in claims 4 to 6, the elastic material or the rubber chip which is an elastic material and earth and sand are used as main materials, petroleum resin as an additive, and asphalt or straight asphalt as a binder are kneaded to obtain a vibration reducing material. Therefore, it is possible to provide an asphalt or straight asphalt type vibration reducing material having excellent vibration transmission reduction performance and particularly excellent in uniaxial compressive strength.

  According to the seventh to thirteenth aspects of the present invention, the vibration reducing material is obtained by kneading the asphalt emulsion as a binder and kneading the asphalt emulsion as a main material with an elastic material or rubber chips or synthetic resin foam beads as an elastic material. Therefore, an asphalt emulsion vibration reducing material having excellent vibration transmission reduction performance can be provided.

  According to the inventions of claims 14 to 24, an elastic material or a rubber chip or a synthetic resin foamed bead which is an elastic material and earth and sand are mainly used, a petroleum resin emulsion is kneaded, and an asphalt emulsion or asphalt emulsion and cement are used as a binder. Since the vibration reducing material is obtained by kneading water, an asphalt emulsion-based vibration reducing material having excellent vibration transmission reduction performance can be provided.

  The present invention has an excellent vibration transmission reduction performance and can be easily installed in a building, with an elastic material such as a rubber chip such as a tire chip and earth and sand as main materials, and as a binder. This was achieved by a vibration reducing material formed by kneading asphalt, straight asphalt or asphalt emulsion.

  For example, when considering the reduction and prevention of noise damage caused by traffic vibration on existing buildings in the vicinity of trains in urban areas, etc. Among them, it is considered effective to reduce or prevent solid sound and noise by using rubber chips such as tire chips and synthetic resin foam beads (for example, polystyrene foam) that are considered to have a high damping effect against vibration. Thus, the development of a novel vibration reducing material was attempted, and the present invention was completed.

Examples of the present invention will be described in detail below.
A schematic diagram of a vibration reduction measure according to the present embodiment is shown in FIG. For example, the vibration caused by the underground train 3 traveling in a shield tunnel or the like constituting the subway line 2 propagates through the ground 5 and reaches the building 6. Therefore, in order to reduce such vibration, the subway line that is a vibration source is used. It is considered effective to reduce the vibration to the periphery of No. 2 or to reduce the vibration at the boundary between the building 6 and the ground 5 where vibration / noise damage is assumed.

  In FIG. 1-1, for example, when a subway line is newly constructed in the ground 5 (underground), a measure for installing the vibration reducing material 1 around the subway line 2 as a shield tunnel, As a normal anti-vibration measure, a close-type foundation construction method that installs the vibration reducing material 1 on the foundation of the building 6, and further installed the vibration reducing material 1 in the ground as shown in Fig. 1-2. Measures to install underground vibration barriers can be considered. Reference numeral 3 'in FIG. 1-2 indicates a ground railway.

Further, there are two ways to reduce the underground vibration, schematically shown in FIG.
The wave blocking type shown in the left column of FIG. 2 is intended to reduce and prevent vibration noise by blocking the wave propagating by the vibration reducing material 1.
As the material of the vibration reducing material 1 in this wave cutoff type, a material having higher density and rigidity than the surrounding ground is suitable. That is, since the portion of the vibration reducing material 1 is rigid with respect to the surrounding ground, the wave of the incident wave is reflected by the vibration reducing material 1, and the wave energy of the transmitted wave is not transmitted to the object such as the building 6 or is difficult to transmit. Mechanism.

  The wave energy absorption type shown in the right column of FIG. 2 is intended to reduce vibration, solid sound, and noise by absorbing the wave energy with the vibration reducing material 1. In this wave energy absorption type, as the material of the vibration reducing material 1, a material having a small rigidity and density with respect to the surrounding ground and a large damping effect is suitable. This is because the wave energy is concentrated on the portion of the vibration reducing material 1 and the portion of the vibration reducing material 1 has a large attenuation effect (absorption effect) on the incident wave, thereby reducing the wave energy of the transmitted wave from the vibration reducing material 1. It is a mechanism to reduce.

  In this example, in order to examine the physical property value of the vibration reducing material, which is a material for forming the vibration reducing material 1, a specimen formed of the vibration reducing material using a vibration triaxial testing machine 10 as shown in FIG. Eleven tests were performed. The specimen 11 had a diameter D5 cm × height H10 cm.

The test method was carried out based on the repeated triaxial test method (stage test) for determining the deformation characteristics of the ground material published by the Geotechnical Society.
The stage test is a test method in which the specimen 11 is repeatedly loaded by the loading piston 18 and the rigidity reduction and the damping constant are examined with respect to the axial strain amplitude. The test conditions were set such that the loading waveform was a sine wave, the loading frequency was 1 Hz, the number of repeated loadings was 11 times, and the effective restraint pressure was 50 to 150 kPa (assuming that the underground depth was 5 to 10 m).

As detailed matters other than the above, measurement failure due to a bedding error is considered, and in the case of the specimen 11 mainly composed of cement, measurement was performed using an LDT (local axial displacement meter) 12. Further, in order to increase the degree of saturation of the specimen 11, carbon dioxide and deaerated water were passed through the specimen 11, and a back pressure of about 50 to 100 kPa was applied using the burette 13. Loading was performed in an undrained state.
In FIG. 3, 14 is a load meter, 15 is a displacement meter, 16 is a minute displacement meter, and 17 is a pore water pressure meter.

Here, a blending example of each material constituting the vibration reducing material according to the present embodiment will be described with reference to FIG.
In FIG. A-1 and formulation No. A-2 is a straight asphalt type vibration reducing material among asphalts. AE-1 and formulation no. AE-2 indicates an asphalt emulsion type vibration reducing material. In FIG. A-1 and formulation No. Although A-2 shows the vibration reduction material of straight asphalt especially in asphalt, this invention is not limited to this, Asphalt other than straight asphalt can be used.

  Compound No. The vibration reducing material A-1 is formed by kneading straight asphalt as a binder, using rubber chips such as tire chips, which are elastic materials, and earth and sand as main materials, petroleum resin as additives, and the like. This blending ratio is a representative example, and the vibration reducing material of the present invention is not limited to this.

Compound No. The vibration reducing material A-2 is formed by kneading a straight asphalt as a binding material with a rubber chip such as a tire chip as an elastic material and earth and sand as main materials. This blending ratio is a representative example, and the vibration reducing material of the present invention is not limited to this.
The blending examples and typical blending ratios of the materials constituting the vibration reducing material 1 using the asphalt-based or straight asphalt-based binder according to the present embodiment are as follows.
(1) A vibration reducing material 1 comprising an elastic material and earth and sand as main materials and kneaded asphalt or straight asphalt as a binder.
(2) A vibration reducing material 1 comprising a rubber chip as an elastic material and earth and sand as main materials and kneaded asphalt or straight asphalt as a binder.
(3) A vibration reducing material obtained by kneading 10 to 40% of asphalt or straight asphalt which is a binder with 30 to 45% of an elastic material or rubber chip and 30 to 45% of earth and sand as a main material. 1.
(4) A vibration reducing material 1 comprising an elastic material and earth and sand as a main material, kneaded with petroleum resin as an additive and asphalt or straight asphalt as a binder.
(5) A vibration reducing material 1 comprising a rubber chip, which is an elastic material, and earth and sand as main materials, kneaded with petroleum resin as an additive and asphalt or straight asphalt as a binder.
(6) By mass ratio, 30 to 45% of an elastic material or rubber chip and 30 to 45% of earth and sand are the main materials, 3 to 15% petroleum resin as an additive, and 10 to 40% of a binder. A vibration reducing material 1 obtained by kneading asphalt or straight asphalt.

  Compound No. The vibration reducing material 1 of AE-1 is composed mainly of rubber chips such as tire chips or synthetic resin foam beads (such as polystyrene foam beads) and earth and sand, which are elastic materials, and cement, water, and asphalt emulsion as binders. Kneaded. In addition, this compounding ratio shows a representative example, and the vibration reducing material 1 of the present invention is not limited to this.

Compound No. The vibration reducing material 1 of AE-2 is obtained by kneading an asphalt emulsion as a binding material, with a rubber chip such as a tire chip and earth and sand, which are elastic materials, as main materials. In addition, this compounding ratio shows a representative example, and the vibration reducing material 1 of the present invention is not limited to this.
The blending examples and typical blending ratios of the respective materials constituting the vibration reducing material 1 using the asphalt emulsion-based binder according to this example are as follows.
(1) A vibration reducing material 1 comprising an elastic material and earth and sand as main materials and an asphalt emulsion as a binder.
(2) A vibration reducing material 1 formed by kneading an asphalt emulsion as a binder with rubber chips and earth and sand as elastic materials as main materials.
(3) A vibration reducing material 1 obtained by kneading 30 to 45% of an elastic material or rubber chip and 30 to 45% of earth and sand as a main material and 10 to 40% of an asphalt emulsion as a binder.
(4) A vibration reducing material 1 comprising a synthetic resin foam bead and earth and sand as elastic materials as main materials and an asphalt emulsion as a binder.
(5) A vibration reducing material 1 in which 5 to 30% synthetic resin foam beads and 30 to 45% earth and sand are mixed as a main material and 10 to 40% asphalt emulsion as a binder is kneaded.
(6) A vibration reducing material 1 comprising a rubber chip as an elastic material and synthetic resin foam beads and earth and sand as main materials and an asphalt emulsion as a binder.
(7) A vibration reducing material comprising 10 to 45% of rubber chips and synthetic resin foam beads and 30 to 45% of earth and sand as a main material and kneading 10 to 40% of asphalt emulsion as a binder. 1.
(8) A vibration reducing material 1 comprising an elastic material and earth and sand as main materials and kneading cement, water and asphalt emulsion as a binder.
(9) A vibration reducing material 1 in which rubber chips and earth and sand, which are elastic materials, are used as main materials and cement, water, and asphalt emulsion are kneaded as a binder.
(10) By mass ratio, rubber chip which is 30-45% elastic material and 30-60% earth and sand as main materials, 3-15% cement, water and 10-40% asphalt which are binders A vibration reducing material 1 obtained by kneading an emulsion.
(11) A vibration reducing material 1 comprising a synthetic resin foam bead and earth and sand, which are elastic materials, as main materials and cement, water, and asphalt emulsion as a binder.
(12) By mass ratio, synthetic resin foam beads, which are 5-30% elastic material, and 30-60% earth and sand are the main materials, and 3-15% cement, water, and 10-40, which are binders. % Vibration reducing material 1 kneaded with asphalt emulsion.
(13) A vibration reducing material 1 comprising a rubber chip as an elastic material and synthetic resin foam beads and earth and sand as main materials, cement and water as a binder, and asphalt emulsion as a binder.
(14) By weight ratio, rubber chips and synthetic resin foam beads, which are 10 to 40% elastic material, and 30 to 50% earth and sand are the main materials, and 3 to 15% cement, water, and 10 which are binders Vibration reducing material 1 obtained by kneading -40% asphalt emulsion.
(15) A vibration reducing material 1 comprising an elastic material and earth and sand as main materials, a petroleum resin emulsion as an additive, and an asphalt emulsion as a binder.
(16) A vibration reducing material obtained by kneading an elastic material such as rubber chips and earth and sand, kneading a petroleum resin emulsion as an additive and an asphalt emulsion as a binder.
(17) A vibration reducing material obtained by kneading a synthetic resin foam bead and earth and sand, which are elastic materials, as a main material, a petroleum resin emulsion as an additive, and an asphalt emulsion as a binder.
(18) A vibration reducing material comprising a rubber chip as an elastic material and synthetic resin foam beads and earth and sand as main materials, a petroleum resin emulsion as an additive, and an asphalt emulsion as a binder.

FIG. 5 shows the physical properties of straight asphalt in this example.
Straight asphalt is produced by subjecting crude oil to atmospheric distillation equipment and vacuum distillation equipment to remove fuel oil and lubricating oil fractions such as gasoline, kerosene, and light oil. In one example, it is used.

  FIG. 6 schematically shows an asphalt emulsion. An asphalt emulsion is obtained by appropriately heating an emulsion obtained by dissolving an asphalt raw material and an emulsifier in water, and mechanically using an emulsifier such as a homogenizer or a colloid mill. It is a brown liquid (emulsion) in which asphalt is dispersed as fine particles in water. Asphalt emulsions have excellent properties such as chemical stability, chemical resistance, corrosion resistance, and excellent tackiness.

  FIG. 7 shows the physical properties of the asphalt emulsion.

Next, the test of the specimen 11 formed of the vibration reducing material using the vibration triaxial testing machine 10 shown in FIG. 3 will be described in detail.
The specimen 11 can be divided into two types, cement type and asphalt type, based on the binder. For comparison, an experiment was also conducted on a specimen (anti-vibration rubber hardness 60 degrees) cut out from a rubber plate used in actual vibration reduction measures.

Note that straight asphalt, which is the asphalt used for the binder, must be heated during construction.
In this test example, the specimen 11 can be mixed at room temperature and is environmentally friendly such as energy saving and CO ₂ suppression compared to asphalt or straight asphalt. We also paid attention to petroleum resins for the purpose of improving asphalt emulsions that can be prepared and uniaxial compressive strength.

FIG. 8 schematically shows the definition of the hysteresis damping h indicating the stress-strain relationship obtained by repeated loading of the vibration triaxial testing machine 10 onto the specimen 11, and FIG. 9 shows the definition of the Young's modulus. The history attenuation h is obtained by the following equation (1).
In FIG. 8, ΔW represents the history area, and W represents the area of the triangle abc.

  In this embodiment, since the test is performed by the vibration triaxial testing machine 10, the elastic modulus is evaluated using a secant Young's modulus E as shown in FIG. Further, since the value of the shear stiffness G is required in the analysis described later, the shear stiffness G is obtained by the following formula 2.

  Here, G: shear rigidity, E: Young's modulus, and ν: Poisson's ratio. In addition, in the test which concerns on a present Example, since it is the load by a non-drainage state, shearing rigidity G was computed as (nu) = 0.5. The density is calculated from the dimensions and mass of the prepared specimen 11.

  Next, test results by the vibration triaxial testing machine 10, that is, test results (axial strain ε-stress) for each specimen 11 of the binder: cement system, anti-vibration rubber (hardness 60 degrees) and binder: asphalt. ) Will be described with reference to FIGS.

The specimen 11 of the cement-based binder shown in FIG. 10 has a Young's modulus E that is 15 to 40 times larger than that of the anti-vibration rubber (hardness 60 degrees) regardless of the type of the mixed material, and the hysteresis attenuation h is The tendency to decrease to 0.25 to 0.8 times was shown. On the other hand, the specimen 11 of the asphalt-based binder had a Young's modulus E almost the same as that of the vibration-proof rubber (hardness 60 degrees) shown in FIG. 11, but the hysteresis damping h increased to about 1 to 3.5 times. did.
In the specimen 11 shown in FIG. 12, the hysteresis attenuation h = 24.33%, which is a large value in spite of the elastic range.

Next, the axial strain dependence of the Young's modulus E and the hysteresis damping h of each specimen 11 will be described.
The specimen 11 of the cement-based binder showed a tendency that the Young's modulus E decreased and the hysteresis damping h increased as the axial strain ε increased. In the specimen 11 of the asphalt-based binder and the specimen 11 of the vibration-proof rubber (hardness 60 degrees), the Young's modulus E did not decrease so much even when the axial strain ε increased, and the hysteresis attenuation h was almost flat. .

The following can be considered as the cause of such a result.
Although the specimen 11 of the cement-based binder showed an improvement in the elastic modulus due to the solidification action of the cement, the structure was already destroyed at a strain of 10 levels, and the rigidity was reduced.
In other words, the solidification action of cement is dominant in the elastic range, and for example, rubber chips such as tire chips (or synthetic resin foam beads; expanded polystyrene beads, etc.) are not exhibiting the elastic properties.

  On the other hand, the specimen 11 of the asphalt-based binder does not show a significant decrease in Young's modulus E even with 10 levels of deformation, and exhibits an elastic property even within a very large range of axial strain ε. It was.

  Further, the hysteresis attenuation h was substantially the same or several times larger than that of the specimen 11 of the vibration-proof rubber (hardness 60 degrees). This is because the asphalt itself is a highly viscous material, and when used as a binder, this tendency was seen because it can be exhibited without damaging the elasticity and stickiness of the rubber chip. Conceivable. It is understood that the hysteresis damping h can be increased and the Young's modulus E can be adjusted by using different types of asphalt for the binder.

Next, with reference to FIG. 13 and FIG. 14, an analysis for grasping how much vibration reduction effect is obtained when the vibration reducing material 1 according to the present embodiment is actually installed in the ground 5 will be described. .
The analysis according to this example was performed using the double reflection theory shown in FIG. 13 and the analysis model shown in FIG. In addition, since the analysis performed in this Example assumes the case where the ground is improved with a semi-infinite length, the influence of wave diffraction and attenuation due to distance are not taken into consideration. Further, in the analysis model shown in FIG. 14, it is assumed that the building close-type ground improvement shown in FIG. 1-1 is assumed, and the thickness H of the vibration reducing material 1 is 0.5 m in consideration of actual construction conditions. Two cases of 1 m were used.

  In the analysis according to this example, the wave transmission loss was evaluated by the following equation (3). In Equation 3, β: transmission loss level, τ: generated wave acceleration amplitude, τ: wave acceleration amplitude transmitted to the building.

  The ground 5 located between the vibration source and the building is assumed to have an N value of 10, shear wave velocity Vs = 200 m / s, and γ = 18 kN / m, but initial shear stiffness G, shear wave velocity Vs, The mass density of the sand ground was calculated using the following equations (4), (5), and (6). In Equations 4, 5, and 6, G: initial shear stiffness, N: N value by standard penetration test, ρ: mass density of sand ground, and γ: unit volume weight of sand ground.

Next, analysis results according to the present embodiment will be described.
Examples of analysis results (frequency-acceleration level characteristics) of the vibration reducing material 1 using cement-based binder, vibration-proof rubber (hardness 60 degrees), and asphalt-based binder are shown in FIG. 15, FIG. 16, and FIG.

  15 to 17, each broken line portion is a result obtained directly from the calculation, but it is considered that an evaluation based on an average value is appropriate as an effective value. Therefore, the peak and valley portions are separated, and the transmission loss level is obtained as an average value, and is represented by a solid line in FIGS.

  Comparing the above three types of analysis results by focusing on the frequency range of 8 to 125 Hz (shown as region A in FIGS. 15 to 17) as the frequency of the solid sound region, the vibration reducing material 1 of the cement-based binder is compared. Since the vibration reducing material 1 having a thickness of 0.5 m or 1.0 m is almost flat near zero, it is considered that the vibration reducing effect is not particularly obtained.

On the other hand, the vibration reducing material 1 of the asphalt-based binder showed an average transmission loss of about 2 dB to 12 dB. This means that the vibration reducing effect equivalent to or higher than that of the anti-vibration rubber (having a hardness of 60 degrees) that has been conventionally used as a vibration reducing measure is exhibited.
Therefore, the member that is considered to be most effective for reducing vibration, solid sound, and noise is the vibration reducing material 1 that combines a resilient material such as a rubber chip such as a tire chip and asphalt as a binder. It has been found.

  18 shows a vibration reducing material 1 (compound No. A-1, blend No. A-2, blend No. 1) formed using the vibration reducing materials having four different blends according to the present embodiment shown in FIG. AE-1, blending No. AE-2), vibration reducing material 1 (mixing No. B-1, blending No. B-2, blending No. B-3) of three types of cementitious binders, 5 The test results of Young's modulus E, sand ground mass density ρ, and vibration damping h for the vibration-reducing material 1 of various types of rubber-based binders are shown.

  In this example, the formulation No. A-1, Formulation No. A-2, Formulation No. AE-1, Formulation No. Each of the vibration reducing materials 1 of AE-2 has a vibration damping h value of about 3 as compared with the vibration reducing material 1 of three types of cement-based binders and the vibration reducing material 1 of five types of rubber-based binders. It has become clear that it is in the range of 2 to 13 times and exhibits excellent vibration reduction performance.

  19 to FIG. The test result of the dynamic characteristic (frequency-stress characteristic) of axial strain (epsilon) -stress about the vibration reduction material 1 of AE-2 is shown, respectively. In this case, dynamic characteristics were obtained for four types of frequencies of 0.1 Hz, 1.0 Hz, 5 Hz, and 10 Hz as the frequency of the solid sound region. As is apparent from FIGS. 19 to 22, the vibration attenuation h is a high value of 22 (%) and 25 (%) especially in the case of frequencies 5 Hz and 10 Hz in the solid sound region, and excellent vibration reduction performance. It became clear to demonstrate.

  From the above analysis results, the vibration reducing material 1 of the cement-based binder cannot use the elasticity-rich property of a rubber material or the like within the elastic range due to the solidification action of the cement. On the other hand, the vibration reducing material 1 of asphalt bonding material makes full use of the elastic force and stickiness properties of an elastic material such as a rubber chip such as a tire chip to increase the hysteresis damping h and adjust the Young's modulus E. be able to.

  Further, the vibration reducing material 1 of the cement-based binder is considered not to have a vibration reducing effect in particular, but the vibration reducing material 1 of the asphalt binder is compared with the vibration reducing performance of the vibration reducing material 1 using a rubber plate or the like. The vibration reducing material 1 that uses asphalt as a binder based on a rubber chip can be very effective for preventing solid noise and noise caused by vibration in the solid sound frequency range. It turned out to be.

  According to the vibration transmission reducing method constructed using the vibration reducing material 1 according to this embodiment, each vibration reducing material 1 exhibiting excellent hysteresis damping characteristics as described above can be used in the subway line 2. It is possible to greatly reduce the transmission of vibrations generated by the traveling of the underground train 3 to the building 6 and to improve the comfort of the living environment of the building 6.

  The present invention can be applied not only to the vicinity of subway lines as described above, but also to vibration reduction measures in the vicinity of ground trunk roads, railway lines, highway structures, etc. that generate traffic vibrations. is there.

It is a schematic diagram of the foundation part construction system example of the vibration reduction countermeasure to the building based on the Example of this invention. It is a schematic diagram of the example of an underground vibration barrier construction method of the vibration reduction measure to the building which concerns on the Example of this invention. It is a schematic diagram of a wave interruption type and a wave energy absorption type, which are measures for reducing underground vibration in the present embodiment. It is a schematic block diagram of the vibration triaxial testing machine which concerns on a present Example. It is a table | surface which shows the example of a mixing | blending of each raw material which comprises the 4 types of vibration reducing material which concerns on a present Example. It is a table | surface which shows the typical physical property of the straight asphalt used for a present Example. 1 is a schematic diagram of an asphalt emulsion according to this example. It is a table | surface which shows the physical property of the cationic asphalt emulsion containing a rubber | gum which concerns on a present Example. It is a figure which shows the definition of the history attenuation | damping which concerns on a present Example. It is a figure which shows the definition of the Young's modulus which concerns on a present Example. It is a figure which shows the test result about the binder: cement-type specimen which concerns on a present Example. It is a figure which shows the test result about the test body of the vibration proof rubber (hardness 60 degree | times) which concerns on a present Example. It is a figure which shows the test result about the specimen of the binder which concerns on a present Example: Asphalt. It is a schematic diagram which shows the double reflection theory for the analysis of the vibration reducing material which concerns on a present Example. It is a figure which shows the analysis model of the vibration reduction material which concerns on a present Example. It is a figure which shows the analysis result of the vibration reduction material which uses the cement-type binder which concerns on a present Example. It is a figure which shows the analysis result of the vibration reducing material which uses the vibration-proof rubber (hardness 60 degree | times) which concerns on a present Example. It is a figure which shows the analysis result of the vibration reduction material which uses the asphalt type | system | group coupling material which concerns on a present Example. Test on vibration reducing material formed by using vibration reducing materials of four different types according to this example, vibration reducing material of three types of cement-based binders, and vibration reducing material of five types of rubber-based binders It is a table | surface which shows a result. Formulation No. according to this example. It is a figure which shows the test result of the dynamic characteristic (frequency 0.1Hz) of axial strain-stress about the vibration reduction material of AE-2. Formulation No. according to this example. It is a figure which shows the test result of the dynamic characteristic (frequency 1.0Hz) of the axial strain-stress about the vibration reduction material of AE-2. In this example, the formulation No. It is a figure which shows the test result of the dynamic characteristic (frequency 5.0Hz) of the axial strain-stress about the vibration reduction material of AE-2. Formulation No. according to this example. It is a figure which shows the test result of the dynamic characteristic (frequency 10Hz) of the axial strain-stress about the vibration reduction material of AE-2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration reduction material 2 Subway line 3 Underground train 3 'Ground railway 5 Ground 6 Building 10 Vibration triaxial testing machine 11 Specimen 12 LDT
13 Burette 14 Load meter 15 Displacement meter 16 Minute displacement meter 17 Pore water pressure meter 18 Loading piston

Claims (24)

  A vibration reducing material comprising an elastic material and earth and sand as main materials and kneaded asphalt or straight asphalt as a binder.   A vibration reducing material comprising a rubber chip as an elastic material and earth and sand as main materials and kneaded asphalt or straight asphalt as a binder.   A vibration characterized by kneading 30 to 45% of an elastic material or rubber chip and 30 to 45% earth and sand as a main material and 10 to 40% asphalt or straight asphalt as a binder. Reduction material.   A vibration reducing material comprising an elastic material and earth and sand as main materials, kneaded with petroleum resin as an additive and asphalt or straight asphalt as a binder.   A vibration reducing material comprising a rubber chip and earth and sand as elastic materials as main materials, kneaded with petroleum resin as an additive and asphalt or straight asphalt as a binder.   Mainly 30-45% elastic material or rubber chip and 30-45% earth and sand, 3-15% petroleum resin as additive, 10-40% asphalt or straight as binder A vibration reducing material characterized by kneading asphalt.   A vibration reducing material comprising an elastic material and earth and sand as main materials and kneaded asphalt emulsion as a binder.   A vibration reducing material comprising rubber chips, which are elastic materials, and earth and sand as main materials and an asphalt emulsion as a binder.   A vibration reducing material comprising, as a main component, 30 to 45% of an elastic material or rubber chip and 30 to 45% of earth and sand, and kneading 10 to 40% of asphalt emulsion as a binder. .   A vibration reducing material comprising a synthetic resin foam bead as an elastic material and earth and sand as main materials and an asphalt emulsion as a binder.   A vibration reducing material comprising, as a main component, 5-30% synthetic resin foam beads and 30-45% earth and sand, and kneading 10-40% asphalt emulsion as a binder. .   A vibration reducing material comprising an elastic material such as rubber chips and synthetic resin foam beads and earth and sand, and kneaded asphalt emulsion as a binder.   A vibration comprising 10 to 45% of rubber chips and synthetic resin foam beads and 30 to 45% of earth and sand as a main material and kneading 10 to 40% of asphalt emulsion as a binder. Reduction material.   A vibration reducing material comprising an elastic material and earth and sand as main materials and cement, water, and an asphalt emulsion as a binder.   A vibration reducing material comprising a rubber chip as an elastic material and earth and sand as main materials and cement, water, and an asphalt emulsion as a binder.   The main components are rubber chips, which are 30-45% elastic material, and 30-60% earth and sand, and 3-15% cement, water, and 10-40% asphalt emulsion, which are binders, in a mass ratio. A vibration reducing material characterized by comprising:   A vibration reducing material comprising a synthetic resin foam bead as an elastic material and earth and sand as main materials and cement, water, and an asphalt emulsion as a binder.   Synthetic resin foam beads, which are 5-30% elastic material, and 30-60% earth and sand are the main materials by mass ratio, and 3-15% cement, water, and 10-40% asphalt, which are binders. A vibration reducing material obtained by kneading an emulsion.   A vibration reducing material comprising a rubber chip as an elastic material and synthetic resin foam beads and earth and sand as a main material, and cement, water, and asphalt emulsion as a binder.   By weight ratio, rubber chips and synthetic resin foam beads, which are 10 to 40% elastic material, and 30 to 50% earth and sand are the main materials, and 3 to 15% cement, water, and 10 to 40%, which are binders. A vibration reducing material comprising kneading an asphalt emulsion.   A vibration reducing material comprising an elastic material and earth and sand as a main material, kneaded with a petroleum resin emulsion as an additive and an asphalt emulsion as a binder.   A vibration reducing material comprising a rubber chip, which is an elastic material, and earth and sand as a main material, a kneaded petroleum resin emulsion as an additive, and an asphalt emulsion as a binder.   A vibration reducing material comprising a synthetic resin foam bead and earth and sand, which are elastic materials, as a main material, a petroleum resin emulsion as an additive, and an asphalt emulsion as a binder.   A vibration reducing material comprising a rubber chip, which is an elastic material, and synthetic resin foam beads and earth and sand, kneaded with a petroleum resin emulsion as an additive and an asphalt emulsion as a binder.