CN210342839U - Vibration isolation device suitable for vertical vibration caused by rail transit - Google Patents
Vibration isolation device suitable for vertical vibration caused by rail transit Download PDFInfo
- Publication number
- CN210342839U CN210342839U CN201920811139.2U CN201920811139U CN210342839U CN 210342839 U CN210342839 U CN 210342839U CN 201920811139 U CN201920811139 U CN 201920811139U CN 210342839 U CN210342839 U CN 210342839U
- Authority
- CN
- China
- Prior art keywords
- vibration isolation
- vibration
- building
- pad
- isolation pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Vibration Prevention Devices (AREA)
Abstract
The utility model discloses a vibration isolation mounting suitable for vertical vibration that track traffic sent. The utility model innovatively adopts vibration isolation pads under the bottom plate of the building and on the underground outdoor wall, so as to greatly weaken the influence of the vibration of the external environment from the aspect of the vibration-receiving body; based on the vibration isolation theory, mounting vibration isolation pads on a bottom plate of a building and an underground outdoor wall so as to avoid the frequency range of vertical vibration caused by rail transit and finally realize high-efficiency vibration isolation; the utility model has easy constructability, convenient installation of the vibration isolation pad and convenient installation and use in the actual engineering; the utility model discloses have the feature of environmental protection, the vibration isolation pad material that uses is green product, can not produce secondary pollution to the surrounding environment.
Description
Technical Field
The utility model relates to a building structure field among the civil engineering, concretely relates to vibration isolation mounting suitable for vertical vibration that track traffic causes.
Background
At present, with the rapid development of subway transportation systems, rail transit also affects buildings and residents around the line while bearing the urban transportation task. Vibration has also become one of the most widely recognized public hazards, and can not only affect and damage transportation, buildings and equipment, but also directly cause injury to human bodies.
For the structural vibration mainly in the vertical direction caused by the rail transit, the current vibration isolation control method mainly takes vibration source control (such as adopting a floating slab rail) and propagation process control (such as excavating a vibration isolation trench) as main components. But if the building is too close to the subway or the two methods are difficult to adopt due to objective reasons, vibration damping control measures of the vibration receiving body are needed.
However, the vibration reduction method of the vibration receiving body is less in research, and the existing vibration reduction measures of the vibration receiving body mainly comprise measures of thickening a basement bottom plate, installing a vertical vibration isolation support and the like. But still have the cost relatively higher, application scope narrow, damping effect is not obvious and have the problem such as differential settlement. In a building structure in civil engineering, once a vibration isolation structure is complex, the problems of high manufacturing cost, easy abrasion, uneven stress, short service life and the like are caused, so that how to realize the vibration isolation effect by using a simple structure is a technical problem to be solved urgently in the field.
Disclosure of Invention
To the problem that exists among the above prior art, the utility model provides a vibration isolation mounting suitable for the vertical vibration that rail transit caused, the utility model discloses realized very good antivibration vibration isolation effect with simple antivibration structure, the cost is low can realize moreover, has effectively solved the building structure's among the civil engineering vibration isolation difficult problem.
The lowest floor of the building is a basement or is positioned on the ground, and the bottom floor of the lowest floor comprises: the waterproof structure comprises a foundation mat layer, a waterproof protective layer and a building bottom plate, wherein the waterproof protective layer and the building bottom plate are sequentially arranged on the foundation mat layer. The utility model discloses after having designed the building and before building the superstructure, set up the vibration isolator in the bottom of the lower floor of building earlier, then continue to build the building on it again to make the building and the vibration isolator system that vibration isolator and building constitute.
The utility model discloses an isolation mounting suitable for vertical vibration that track traffic causes includes: vibration isolation pads, sealing strips and protective films; wherein, the vibration isolation pad is made of a material with a damping ratio of 5-10%; arranging a vibration isolation pad on the waterproof protective layer at the lowest layer of the building, wherein the vibration isolation pad and the building are collectively called the building and a vibration isolation pad system; according to the pressure distribution of the designed building, the vibration isolation pad is divided into n areas, and the pressure of each area is P1～PnAnd the total rigidity of the elastic deformation, the pressure and the vibration isolation pad meets the following requirements:
wherein, KiIs the total stiffness, P, of the vibration isolator of the i-th zoneiIs the pressure of the i-th region, ΔiIs the elastic deformation of the vibration-isolating pad of the i-th zone, SiIs the area of the ith region, i ═ 1, … …, n; the minimum prominent frequency caused by the subway is f', and the minimum value of the elastic deformation of each region
Minimum value of Δ according to elastic deformationminDetermining a maximum value of stiffness per unit area of the vibration isolator of the i-th zone
The vibration isolation pad of the ith area adopts the maximum value k of the unit area rigidity of the vibration isolation pad of the ith areamaxiNearest kiCorresponding model number, kiThe unit area rigidity of the vibration isolation pad in the ith area is equal, and the elastic deformation of the vibration isolation pads in different areas tends to be the same; sealing the butt seams between the vibration isolators in different areas by adopting sealing strips; covering a protective film on the vibration isolation pad after sealing and butting; and laying a building bottom plate on the protective film.
And constructing a building on the building bottom plate.
The natural frequencies of the building and the vibration isolator system need to meet 10Hz or more at the same time.
The thickness of the vibration isolation pad is 10 mm-15 mm. The thickness of the vibration isolator is the same in each region.
The vibration isolation pad is made of a material with vibration isolation effect, is one of cork, felt, fiber and a rubber pad, and has a damping ratio delta of 5-10%. The damping ratio delta for the same material is the same, but the stiffness for different models of the same material is different. The vibration isolators in different areas are made of the same material, different models are selected according to different pressures, and the corresponding different rigidities are different, so that the elastic deformation is the same. According to the basic theory of elastic dynamics, the transmission coefficient T:
wherein δ is a damping ratio of the vibration isolator to the building system, and δ can be approximately regarded as the damping ratio of the vibration isolator because the deformation of the superstructure in vibration is small and is basically in an elastic state, ω is a vibration angular frequency of the subway, ω is 2 π f, f is a vibration frequency of the subway, ω is a vibration angular frequency of the subway, and ω is a vibration frequency of the subway0For angular frequency of vibration, omega, of buildings and vibration-insulating mat systems0＝2πf0，f0For the natural frequency of the building and the vibration isolator system, since the mass of the vibration isolator is much smaller than the mass of the building, only the mass of the building needs to be considered when calculating the natural frequency, since
And Δi≈ΔminThe difference is usually only a few millimeters, which is negligible in civil engineering, so that the elastic deformations in different regions can be considered as ΔminSo that the natural frequencies of the different areas are the same, thereby obtaining the natural frequencies of the building and the vibration isolation cushion system
The utility model discloses a vibration isolator for the subway arouses that the minimum prominent frequency of building vibration is not less than the natural frequency of building and vibration isolator system
The vibration isolation pad can play a remarkable vibration isolation effect at the moment, so that the vertical vibration of the building caused by rail transit is reduced.
The protective film is made of polyethylene film or ethylene-vinyl acetate copolymer EVA.
The sealing strip adopts one of an aluminum foil tape, a base tape and an asphalt tape.
The utility model discloses a vibration isolation method suitable for vertical vibration that track traffic causes, including following step:
1) selecting one material from materials with the damping ratio of 5-10% as a vibration isolator;
2) according to the design of the building to be constructed, the mass distribution of the building in different areas is uneven, so that the pressure intensity of the building in different areas on the vibration isolation pad is different, the area of the areas is determined according to the pressure intensity distribution, the vibration isolation pad is divided into n areas, the pressure intensity of each area is P1～PnArea is S respectively1～Sn，Mass is m respectively1～mn，；
3) The minimum prominent frequency f' caused by subway before the building is not constructed is obtained, the natural frequency of the building and the vibration isolation cushion system is related to the rigidity of the vibration isolation cushion and the mass of the building, and the natural frequency f of the building and the vibration isolation cushion system in the ith area is obtainedi，
Need to satisfy
To avoid too small a vertical stiffness of the structure, fi≥10Hz；
4) The elastic deformation, the pressure intensity and the rigidity of the vibration isolation pad meet the following requirements:
wherein, KiIs the interval of the ith areaTotal stiffness of the vibrating pad, PiIs the pressure of the i-th region, SiArea of the vibration-isolating pad of i zones, DeltaiIs the elastic deformation of the vibration isolator in the ith zone, i is 1, … …, n,
by
Determining the maximum value Delta of the elastic deformation of each regionmaxTo a minimum value ΔminMinimum value of elastic deformation
Minimum value of Δ according to elastic deformationminDetermining a maximum value of stiffness per unit area of the vibration isolator of the i-th zone
5) Selecting stiffness of corresponding vibration isolator corresponding to pressure in different regions, and selecting maximum value k of stiffness of vibration isolator corresponding to ith regionmaxiNearest kiThe vibration isolation pad of the corresponding type is used as the vibration isolation pad of the ith area, kiStiffness per unit area, k, of the vibration isolator of the i-th zonei≤kmaxiSo that the elastic deformation of the different regions tends to be the same;
6) according to the basic theory of elastic dynamics, the transmission coefficient T:
wherein, δ is the damping ratio of the vibration isolation pad, ω is the vibration angular frequency of the subway, ω is 2 pi f, f is the vibration frequency of the subway, ω is0For angular frequency of vibration, omega, of buildings and vibration-insulating mat systems0＝2πf0，f0Being the natural frequency of the building and the vibration isolator system,
checking and calculating the vibration reduction efficiency of 1-T according to the transmission coefficient;
7) after the construction of the waterproof protective layer is completely finished, dividing regions on the waterproof protective layer according to different pressure intensity distributions, and setting marks;
8) arranging vibration isolators with corresponding models in corresponding areas according to the unit area rigidity of the vibration isolators determined in the step 5);
9) sealing the butt seams between the vibration isolators in different areas by adopting sealing strips;
10) covering a protective film on the vibration isolation pad after sealing and butting;
11) and laying a building bottom plate on the protective film, and continuously constructing the building on the building bottom plate.
Further, in order to enhance the vibration isolation effect, after the building bottom plate of the basement of the building is complete, the side wall of the basement is constructed, after the waterproof coating is sprayed on the outer wall of the side wall, a vibration isolation pad is arranged on the outer wall of the side wall of the basement, and the type and the thickness of the vibration isolation pad on the outer wall of the side wall are consistent with those of the vibration isolation pad on the adjacent bottom layer; directly sticking the vibration isolating pad on the waterproof coating layer; waterproof paint is sprayed on the vibration isolation pads, gaps possibly existing among the vibration isolation pads are filled, and finally the waterproof coiled material is pasted.
The utility model has the advantages that:
(1) the utility model innovatively introduces the vibration isolation pad technology to the lower part of the bottom plate of the building and the outer wall of the underground chamber, so as to greatly weaken the influence of the vibration of the external environment from the aspect of the vibration-receiving body; (2) based on the vibration isolation theory, mounting vibration isolation pads on a bottom plate of a building and an underground outdoor wall so as to avoid the frequency range of vertical vibration caused by rail transit and finally realize high-efficiency vibration isolation; (3) the vibration isolator is easy to construct, is very convenient to install and is convenient to install and use in actual engineering; the utility model discloses have the feature of environmental protection, the vibration isolation pad material that uses is green product, can not produce secondary pollution to the surrounding environment.
Drawings
Fig. 1 is an implementation schematic diagram of the vibration isolation device suitable for vertical vibration caused by rail transit of the present invention;
fig. 2 is a schematic view of the paving position of the vibration isolation device suitable for vertical vibration caused by rail transit of the present invention;
fig. 3 is a schematic diagram of the pavement position of an embodiment of the vibration isolation device suitable for vertical vibration caused by rail transit of the present invention.
Detailed Description
The invention will be further elucidated by means of specific embodiments in the following with reference to the drawings.
As shown in fig. 1, the frequency of the vibration of the building 03 caused by the subway 02 vibration transmitted through the soil layer 01 is usually within the range of 20Hz to 80Hz, and at this time, the vibration isolation pad 1 arranged on the bottom layer of the building can play a relatively significant vibration isolation role, so that the vertical vibration of the building caused by rail traffic is reduced.
As shown in fig. 2, the bottom floor of the basement includes: the waterproof building comprises a foundation mat layer 04, a waterproof protective layer 05 and a building bottom plate 06, wherein the waterproof protective layer and the building bottom plate are sequentially arranged on the foundation mat layer. After the building is designed and before the upper building is constructed, the vibration isolation pad 1 is arranged in the bottom layer of the lowest layer of the building, and then the building is continuously constructed on the vibration isolation pad.
In this embodiment, a cultural center is constructed near a subway, and since the cultural center has a functional area that is extremely sensitive to vibration, such as a theater, a sound recorder, and a theater, it is necessary to perform vibration isolation processing on a main building.
The vibration isolation method suitable for the vertical vibration caused by the rail transit comprises the following steps:
1) selecting a rubber pad as a vibration isolator from materials with the damping ratio of 5% -10%, wherein the damping ratio of the rubber pad is 5%;
2) according to the design of the building to be constructed, the pressure intensity of the building in different areas on the vibration isolation pad is not uniform due to the uneven mass distribution of the building in different areasMeanwhile, the area of the region is determined according to the pressure distribution, and the vibration isolating pad is divided into three regions, A, B and C respectively, as shown in FIG. 3, the pressure of each region is P respectively1～P3，P1＝150kN/m2, P2＝300kN/m2，P3＝500kN/m2Area is S respectively1～S3，S1Is 2500m2，S2Is 2000m2，S3Is 1800m2Mass is m respectively1～m3，；
3) Measuring or estimating the minimum prominent frequency f 'caused by a subway before an unstructured building, the frequency of the subway being typically between 20 Hz-40 Hz and 60 Hz-80 Hz, the minimum prominent frequency f' being 20Hz, the natural frequency of the building and the vibration isolation cushion system being related to the stiffness of the vibration isolation cushion and the mass of the building, the natural frequency of the building and the vibration isolation cushion system in the ith area being fi，
Need to satisfy
To avoid too small a vertical stiffness of the structure, fi≥10Hz，i＝1,2,3；
4) The elastic deformation, the pressure intensity and the total rigidity of the vibration isolation pad meet the following requirements:
wherein, KiIs the stiffness, P, of the vibration isolator of the ith zoneiIs the pressure of the i-th region, SiArea of the vibration-isolating pad of i zones, DeltaiIs the elastic deformation of the vibration isolator of the ith zone,
by
Determining the maximum value Delta of the elastic deformation of each regionmaxTo and fromSmall value of deltaminMinimum value of elastic deformation
Minimum value of Δ according to elastic deformationminDetermining maximum value of unit area rigidity of three-area vibration isolator
Are each kmax1＝121kN/mm，kmax2＝242kN/mm，kmax3＝403kN/mm；
5) Selecting the stiffness of the corresponding vibration isolator corresponding to the pressure of different areas, and selecting the maximum value k of the stiffness of the vibration isolator in the ith areamaxiEqual kiThe vibration isolator with the corresponding type is used as the vibration isolator of the ith area, so that the elastic deformation of different areas tends to be the same, and k is1＝121kN/mm，k2＝242kN/mm，k3403 kN/mm; the thickness of the vibration isolation pad is 15 mm;
6) according to the basic theory of elastic dynamics, the transmission coefficient T:
wherein, δ is the damping ratio of the vibration isolation pad is 0.1, ω is the vibration angular frequency of the subway, ω is 2 pi f, f is the vibration frequency of the subway, f is 20Hz, ω is0For angular frequency of vibration, omega, of buildings and vibration-insulating mat systems0＝2πf0，f0Obtaining the natural frequency of the building and the vibration isolation cushion system for the natural frequency of the building and the vibration isolation cushion system
Is 14 Hz; obtaining a transmission coefficient T which is 0.583, and checking and calculating the damping efficiency 1-T which is 41.7% according to the transmission coefficient;
7) after the waterproof protective layer construction of the basement of the building is completely finished, dividing regions on the waterproof protective layer according to different pressure intensity distribution, and setting marks, as shown in fig. 3;
8) arranging vibration isolators with corresponding rigidity on corresponding areas according to the rigidity of the vibration isolators determined in the step 5);
9) sealing and jointing the vibration isolators in different areas by using aluminum foil tapes;
10) covering a polyethylene film on the vibration isolation pad after sealing and butting;
11) laying a building bottom plate on the protective film;
12) constructing the side wall of the basement, spraying 2mm non-cured rubber asphalt on the outer wall of the side wall to serve as waterproof paint, arranging vibration isolation pads on the outer wall of the side wall of the basement, enabling the types and the thicknesses of the vibration isolation pads on the outer wall of the side wall to be consistent with those of the vibration isolation pads on the adjacent bottom layer, and using a mallet to tamp the vibration isolation pads; directly sticking the vibration isolating pad on the waterproof coating layer; spraying non-cured rubber asphalt on the vibration isolation pads to serve as waterproof paint, filling gaps possibly existing between the vibration isolation pads, and finally adhering waterproof coiled materials.
Finally, it is noted that the disclosed embodiments are intended to aid in further understanding of the invention, but will be understood by those skilled in the art that: various substitutions and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the present invention should not be limited to the embodiments disclosed, and the scope of the present invention is defined by the appended claims.
Claims (7)
1. A vibration isolation device suitable for vertical vibration caused by rail transit, the lowest floor of a building is a basement or is located on the ground, and the bottom of the lowest floor comprises: basis bed course, waterproof layer and building bottom plate set gradually waterproof layer and building bottom plate on the basis bed course, its characterized in that, the vibration isolation device includes: vibration isolation pads, sealing strips and protective films; wherein, the vibration isolation pad is made of a material with a damping ratio of 5-10%; the lowest waterproof protective layer of the building is provided with vibration isolationMats, vibration isolators, and buildings are collectively referred to as buildings and vibration isolator systems; according to the pressure distribution of the designed building, the vibration isolation pad is divided into n areas, and the pressure of each area is P1～PnAnd the total rigidity of the elastic deformation, the pressure and the vibration isolation pad meets the following requirements:
wherein, KiIs the total stiffness, P, of the vibration isolator of the i-th zoneiIs the pressure of the i-th region, ΔiIs the elastic deformation of the vibration-isolating pad of the i-th zone, SiIs the area of the ith region, i ═ 1, … …, n; the minimum prominent frequency caused by the subway is f', and the minimum value of the elastic deformation of each region
Minimum value of Δ according to elastic deformationminDetermining a maximum value of stiffness per unit area of the vibration isolator of the i-th zone
The vibration isolation pad of the ith area adopts the maximum value k of the unit area rigidity of the vibration isolation pad of the ith areamaxiNearest kiCorresponding model number, kiThe unit area rigidity of the vibration isolation pad in the ith area is equal, and the elastic deformation of the vibration isolation pads in different areas tends to be the same; sealing the butt seams between the vibration isolators in different areas by adopting sealing strips; covering a protective film on the vibration isolation pad after sealing and butting; and laying a building bottom plate on the protective film.
2. The vibration isolation device according to claim 1, wherein the thickness of said vibration isolation pad is 10mm to 15 mm.
3. The vibration isolation apparatus according to claim 1, wherein the material of said vibration isolation pad is a material having a vibration isolation effect.
4. The vibration isolation device according to claim 3, wherein the material of said vibration isolation pad is one of cork, felt, fiber and rubber pad.
5. The vibration isolation device according to claim 1, wherein said protective film is a polyethylene film or an ethylene-vinyl acetate copolymer (EVA).
6. The vibration isolation device according to claim 1, wherein said sealing strip is one of an aluminum foil tape, a base tape and an asphalt tape.
7. The vibration isolation device according to claim 1, further comprising a vibration isolation pad provided on the outer wall of the side wall of the basement; the vibration isolation pad is adhered to the waterproof coating layer of the outer wall of the side wall of the basement; and spraying waterproof paint on the vibration isolation pad, and adhering a waterproof coiled material on the waterproof paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920811139.2U CN210342839U (en) | 2019-05-31 | 2019-05-31 | Vibration isolation device suitable for vertical vibration caused by rail transit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920811139.2U CN210342839U (en) | 2019-05-31 | 2019-05-31 | Vibration isolation device suitable for vertical vibration caused by rail transit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210342839U true CN210342839U (en) | 2020-04-17 |
Family
ID=70185596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920811139.2U Active CN210342839U (en) | 2019-05-31 | 2019-05-31 | Vibration isolation device suitable for vertical vibration caused by rail transit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210342839U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242089A (en) * | 2019-05-31 | 2019-09-17 | 杨维国 | A kind of isolation mounting and vibration isolating method suitable for vertical motion caused by rail traffic |
-
2019
- 2019-05-31 CN CN201920811139.2U patent/CN210342839U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242089A (en) * | 2019-05-31 | 2019-09-17 | 杨维国 | A kind of isolation mounting and vibration isolating method suitable for vertical motion caused by rail traffic |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109594669B (en) | Method for reducing influence of rail traffic vibration on existing building and vibration-damping building | |
| Vogiatzis et al. | Ground-borne noise and vibration transmitted from subway networks to multi-storey reinforced concrete buildings | |
| WO2014139252A1 (en) | Method for constructing large raft foundation in high-temperature environment | |
| JP2019501320A (en) | Prefabricated slab type anti-vibration track structure system and related construction method | |
| CN101614069A (en) | Construction method of floating floor | |
| CN107542115B (en) | Underground engineering waterproof structure and construction method thereof | |
| CN212836496U (en) | Height-adjustable floor support structure | |
| CN109635327B (en) | Building vibration reduction method influenced by rail transit vibration and vibration reduction effect evaluation method | |
| CN109930631B (en) | Vibration isolation structure of building foundation and construction method thereof | |
| CN103352401B (en) | Embedded type track | |
| CN211037072U (en) | Piping lane bottom plate waterproof construction | |
| CN210342839U (en) | Vibration isolation device suitable for vertical vibration caused by rail transit | |
| CN105603833B (en) | Integral fill type prefabricated board vibration damping track | |
| CN107524158B (en) | Vibration isolation foundation structure for precision equipment and construction process | |
| CN110284590B (en) | Box-in-box steel structure sound insulation and vibration reduction system and construction method thereof | |
| CN110242089A (en) | A kind of isolation mounting and vibration isolating method suitable for vertical motion caused by rail traffic | |
| CN103603373B (en) | Prefabricated inspection well and road construction method involving inspection well | |
| CN105256930A (en) | Suspended quakeproof sound-proof isolating layer structure and quakeproof sound-proof floor slab construction method | |
| CN108467225B (en) | A kind of trielement composite material subway vibration-damping ballast production method | |
| CN209923991U (en) | Vibration isolation structure for building foundation | |
| CN216840146U (en) | Combined sound-insulation vibration-reduction floating building platform | |
| CN115491932A (en) | Multi-layer composite vibration reduction track structure for urban rail transit engineering and construction method | |
| CN207553344U (en) | A kind of building floor shock-damping structure | |
| CN110700334A (en) | Rapid repairing method for fan foundation | |
| Sigl et al. | Design of bored tunnel linings for Singapore MRT North East Line C706 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |