CN110761132A - Assembled vibration isolation barrier - Google Patents
Assembled vibration isolation barrier Download PDFInfo
- Publication number
- CN110761132A CN110761132A CN201910981067.0A CN201910981067A CN110761132A CN 110761132 A CN110761132 A CN 110761132A CN 201910981067 A CN201910981067 A CN 201910981067A CN 110761132 A CN110761132 A CN 110761132A
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- vibration isolation
- isolation barrier
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- flange
- barrier
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of vibration isolation and discloses an assembled vibration isolation barrier. The assembled vibration isolation barrier comprises a plurality of vibration isolation modules which are arranged in parallel along the horizontal direction, each vibration isolation module comprises a plurality of web portions which are arranged in a stacked mode along the vertical direction and a flange portion which is arranged above the topmost web portion, the web portions and the flange portions are both hollow structures, and every two adjacent web portions are detachably connected. The web parts can be detachably connected, and the web parts and the flange parts can be made into prefabricated parts in advance in a workshop and connected and assembled on site, so that the on-site manufacture is avoided, the on-site construction time of the vibration isolation barrier is shortened, and the cost of the vibration isolation barrier is reduced; meanwhile, the web part and the flange part adopt hollow structures, the hollow structures enable the vibration isolation barrier to form a cavity under the condition of ensuring the structural strength of the vibration isolation barrier, the vibration isolation effect is close to that of an empty ditch vibration isolation barrier, and the vibration isolation effect is improved while the stability is ensured.
Description
Technical Field
The invention relates to the technical field of vibration isolation, in particular to an assembled vibration isolation barrier.
Background
Vibrations in the construction environment are generated by various sources, such as industrial machinery, road and rail traffic, which may cause sensitive equipment to malfunction and annoy people, and different measures are required to mitigate the vibrations. Depending on the different vibration generation and propagation conditions, one can effectively reduce the vibration level by intervening at the vibration source; the amplitude of the vibration wave can also be reduced by applying a barrier on the propagation path of the vibration wave.
The principle of barrier vibration isolation is based on reflection and scattering of wave energy, and the essence of the principle is the problem of wave propagation in a heterogeneous elastic half-space, namely the problem of interaction between elastic waves and barriers in soil media, and the problem mainly appears in two aspects, namely the phenomenon of dynamic stress concentration at the periphery of the barriers; the other is the transmission change rule of wave reflection, refraction, transmission and the like caused by the existence of the barrier. The vibration isolation effect is measured by the amount of transmitted energy, and the vibration isolation effect is good if the transmitted energy is small.
In the vibration isolation barriers, the vibration isolation effect of the hollow ditch vibration isolation barrier is most obvious, and the hollow ditch vibration isolation barrier is filled with bentonite, geotechnical materials, sawdust, metal high-density materials and other materials; or a concrete pipe pile, a concrete retaining wall and a reinforced concrete slab are specially arranged to form a barrier vibration isolation structure, in order to obtain a material with high impedance, an air cushion is used for isolating vibration caused by train load abroad even, and the air cushion for vibration isolation consists of an inner air cushion, middle protective slurry and an outer retaining wall. The traditional empty trench vibration isolation barrier is not filled with filler, the structural stability is poor, the traditional empty trench vibration isolation barrier is not suitable for being used in the dense and soft soil environment of a building, meanwhile, the empty trench vibration isolation barrier is manufactured in the field construction mode, the field construction is inconvenient, a concrete wall needs to be poured for ensuring the stability, the construction period is prolonged, the cost is increased, and the economical efficiency is poor.
Disclosure of Invention
The purpose of the invention is: the utility model provides an assembled vibration isolation barrier to solve the problem that the air ditch vibration isolation barrier in the prior art is inconvenient at the site operation, economic nature is poor.
In order to achieve the above object, the present invention provides a fabricated vibration isolation barrier, comprising a plurality of vibration isolation modules arranged side by side in a horizontal direction, wherein each vibration isolation module comprises a plurality of web portions arranged in a vertical direction in a stacked manner and a flange portion arranged above a topmost web portion, each of the web portions and the flange portion is a hollow structure, and two adjacent web portions are detachably connected with each other.
Preferably, two adjacent web portions are connected by bolts.
Preferably, the bolt is a stud bolt, the thread turning directions of the two ends of the stud bolt are opposite, and bolt holes matched with the stud bolt are respectively formed in the top surface and the bottom surface of the web portion.
Preferably, the dimensions of the respective web portions are the same.
Preferably, a connection layer is filled between two adjacent vibration isolation modules.
Preferably, the connecting layer is a poured layer poured with a mixture of gravel and cement.
Preferably, the flange portion has a flange that extends horizontally beyond the web portion.
Preferably, the web portion and the flange portion are both made of concrete.
Compared with the prior art, the assembled vibration isolation barrier provided by the embodiment of the invention has the beneficial effects that: the vibration isolation barrier comprises a plurality of vibration isolation modules, a plurality of connecting plates and a plurality of connecting plates, wherein the plurality of vibration isolation modules are arranged in parallel along the horizontal direction, each vibration isolation module comprises a plurality of web parts and flange parts, the web parts are detachably connected, and the web parts and the flange parts can be manufactured into prefabricated parts in advance in a workshop and connected and assembled on site, so that the site manufacture is avoided, the site construction time of the vibration; meanwhile, the web part and the flange part adopt hollow structures, the hollow structures enable the vibration isolation barrier to form a cavity under the condition of ensuring the structural strength of the vibration isolation barrier, the vibration isolation effect is close to that of an empty ditch vibration isolation barrier, and the vibration isolation effect is improved while the stability is ensured.
Drawings
FIG. 1 is a schematic structural view of a fabricated vibration isolation barrier of the present invention;
FIG. 2 is a schematic structural view of a web portion of the fabricated vibration isolation barrier of FIG. 1;
fig. 3 is a schematic view of a flange portion of the fabricated vibration isolation barrier of fig. 1;
FIG. 4 is an exploded schematic view of a web portion of the fabricated vibration isolation barrier of FIG. 1;
FIG. 5 is a view of the assembled vibration isolation barrier of the present invention installed in a trench;
FIG. 6 is a view of the assembled vibration isolation barrier of the present invention installed in a trench;
FIG. 7 is a flow chart of the installation of the fabricated vibration isolation barrier of the present invention;
FIG. 8 is a schematic view of the load application point and the observation point of the fabricated vibration isolation barrier of the present invention in numerical simulation;
fig. 9 is a graph showing the vibration isolation results of the fabricated vibration isolation barrier of the present invention in a single layer of soft soil;
fig. 10 is a graph showing the vibration isolation result of the fabricated vibration isolation barrier of the present invention in a single layer of hard soil.
In the figure, 1, web portion; 11. bolt holes; 2. a flange portion; 21. a flange; 3. a perfusion layer; 4. a stud bolt; 5. a steel hook; 6. and (4) a groove.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The present invention relates to a preferred embodiment of an assembled vibration isolation barrier, as shown in fig. 1 to 6, the assembled vibration isolation barrier is arranged in a plurality of vibration isolation modules arranged in parallel, the vibration isolation modules are arranged in parallel along a horizontal direction, a connecting layer is filled between two adjacent vibration isolation modules, the connecting layer is a perfusion layer 3 filled with gravel and cement mixture, the perfusion layer 3 can be perfused into a gap between two adjacent vibration isolation modules, and after solidification, the vibration isolation modules can be connected into a whole, so as to increase the structural strength and stability of the assembled vibration isolation barrier, and the assembled vibration isolation barrier is suitable for being used in the environment with dense buildings and soft soil.
The vibration isolation module comprises a web part 1 and a flange part 2, wherein the web part 1 is provided with a plurality of flanges which are arranged in a stacked mode in the vertical direction, the flange part 2 is arranged above the topmost web part 1, the flange part 2 is provided with a flange 21, the level of the flange 21 exceeds that of the web part 1, the width of the surface of the assembly barrier can be increased through the flange 21, propagation of Rayleigh waves on the surface is effectively cut off, transmitted energy is reduced, and the vibration isolation effect is further enhanced.
The materials of the web part 1 and the flange part 2 are concrete, the structural strength of the concrete is high, the web part 1 and the flange part 2 are both of hollow structures, and the hollow structures ensure that the assembled vibration isolation barrier forms a cavity under the condition of ensuring the structural strength of the assembled vibration isolation barrier, the vibration isolation effect is close to that of an empty ditch, and the vibration isolation effect is improved while the stability is ensured.
The sizes of the web parts 1 are the same, so that the web parts 1 can be manufactured by the same die, the cost of the die is reduced, and meanwhile, the web parts 1 can be replaced mutually, so that the assembling difficulty is reduced. Two adjacent web portions 1 are connected through bolts, the bolts are stud bolts 4, and the thread directions of two ends of the stud bolts 4 are opposite.
In the construction of the assembled vibration isolation barrier of the present invention, as shown in fig. 7, a trench 6 is excavated on the bottom surface, an excavator is used to excavate the trench to a desired depth, and an installation space of a flange part 2 is reserved at the top of the trench 6; assembling each web part 1 by using a stud bolt 4, screwing a steel hook 5 with a bolt head into a bolt hole 11 of the topmost web part 1 after the web parts 1 are assembled to a required depth, hoisting the assembled web parts 1 into a groove 6 by using a crane, and hoisting a flange part 2 to the top of the web part 1 after screwing the steel hook 5 out to form a vibration isolation module; and (3) sequentially assembling all the vibration isolation modules in parallel in the groove 6, filling a mixture of gravel and cement into two adjacent vibration isolation modules after the vibration isolation modules are finished to form a connecting layer, and finishing the arrangement of the assembled vibration isolation barrier.
The method comprises the following steps of carrying out simulation analysis on the vibration isolation effect of the assembled vibration isolation barrier through a numerical simulation technology, and specifically comprising the step of determining the overall geometric parameters of a model. Specifically, the effect of the fabricated vibration isolation barrier is researched by using an ANSYS modeling method and utilizing matlab software to carry out 2.5D finite element numerical analysis. Because the geometric shape of the model is unchanged along the direction of the vibration isolation groove 6, the vibration isolation effect of the vibration isolation groove can be obtained by calculating the response of a certain section. The finite element model is established in a rectangular coordinate system, the schematic size diagram of the finite element model is shown in FIG. 8, a calculation plane is rectangular, the size of the plane is 40m multiplied by 20m, the depth of a soil body is 20m, and absorption boundaries are arranged around the calculation plane and are used for simulating the infinite domain problem of the soil body.
And secondly, determining geometric, physical and mechanical parameters of the assembled vibration isolation barrier. The total depth of the vibration isolation grooves 6 is 8m, wherein the flange part is 1m deep and the web part is 7m deep. The prefabricated modules are cast by C50 concrete, and the material parameters are as follows: the density was 2500kg/m3, the Young's modulus was 34.5GPa, and the Poisson's ratio was 0.1667.
And step three, determining geometric, physical and mechanical parameters of the soil layer. Wherein the soil layers are divided into single-layer soft soil and single-layer hard soil.
For single-layer soft soil, the soil is relatively soft and is common silty clay. The physical and mechanical parameters of the soil layer are as follows: the density was 1800kg/m3, the Young's modulus was 108MPa, and the Poisson's ratio was 0.33.
For a single layer of hard soil, mainly a sand layer, the density is 2000kg/m3, the elastic modulus is 4.8GPa, and the Poisson ratio is 0.33.
And step four, determining the excitation load. The train vibration load is analyzed and calculated by adopting a 2.5DPML method, unit force acts on a load acting point, and the response of a receiving point under the action of 0-100 Hz load frequency is calculated. As shown in fig. 8, the distance from the load application point a to the center line of the assembled vibration isolation barrier is 3m, and the distance from the observation point B to the center line of the assembled vibration isolation barrier is also 3 m.
And step four, determining a calculation result.
The damping decibel of the assembled vibration isolation barrier in a single-layer soft soil is shown in fig. 9, wherein the abscissa in fig. 9 is the load frequency, and the ordinate is the damping decibel. The calculation result shows that the vibration isolation effect of the assembled vibration isolation barrier is obvious, and under the medium and low load frequency of 0-45 Hz, the vibration isolation effect is increased along with the increase of the frequency, and the attenuation decibel is also increased, and can reach 30dB at most; for the high-frequency load of 40 Hz-100 Hz, the attenuation decibel is reduced along with the increase of the frequency.
The decibel of attenuation of the assembled vibration isolation barrier in a single layer of hard soil is shown in fig. 10, wherein the abscissa in fig. 10 is the load frequency, and the ordinate is the decibel of attenuation. As can be seen from the calculation results, the vibration isolation effect of the fabricated vibration isolation barrier is reduced relative to that in soft soil; for the low-frequency load component of 1 Hz-10 Hz, the corresponding decibel attenuation quantity is a negative number, which means that the assembled vibration isolation barrier cannot effectively isolate the train load under the frequency band; for the intermediate frequency component of 10 Hz-50 Hz, the corresponding attenuation decibel quantity can reach 25 dB; for the 40 Hz-100 Hz high frequency components, the attenuation decibels decrease as the frequency increases.
In summary, the following steps: the assembled vibration isolation barrier has more excellent vibration isolation effect in soft soil and is reduced in hard soil.
To sum up, the embodiment of the invention provides an assembled vibration isolation barrier, a plurality of vibration isolation modules of which are arranged in parallel along the horizontal direction, each vibration isolation module comprises a plurality of web parts and flange parts, the web parts are detachably connected, and the web parts and the flange parts can be made into prefabricated parts in advance in a workshop and connected and assembled on site, so that the site manufacture is avoided, the site construction time of the vibration isolation barrier is shortened, and the cost of the vibration isolation barrier is reduced; meanwhile, the web part and the flange part adopt hollow structures, the hollow structures enable the vibration isolation barrier to form a cavity under the condition of ensuring the structural strength of the vibration isolation barrier, the vibration isolation effect is close to that of an empty ditch vibration isolation barrier, and the vibration isolation effect is improved while the stability is ensured.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (8)
1. An assembled vibration isolation barrier is characterized by comprising a plurality of vibration isolation modules which are arranged in parallel along the horizontal direction, wherein each vibration isolation module comprises a plurality of web parts which are arranged in a stacked mode along the vertical direction and a flange part which is arranged above the topmost web part, the web parts and the flange parts are both hollow structures, and every two adjacent web parts are detachably connected.
2. The fabricated vibration isolation barrier of claim 1, wherein adjacent web portions are connected by bolts.
3. The fabricated vibration isolation barrier according to claim 2, wherein the bolts are studs, the threads of the studs are oppositely threaded, and the top and bottom surfaces of the web portion are respectively provided with bolt holes for engaging with the studs.
4. The fabricated vibration isolation barrier of claim 1, wherein the web portions are the same size.
5. The fabricated vibration isolation barrier of any one of claims 1 to 4, wherein a connection layer is filled between two adjacent vibration isolation modules.
6. The fabricated vibration isolation barrier of claim 5, wherein the connection layer is a poured layer poured with a gravel and cement mixture.
7. The fabricated vibration isolation barrier of any one of claims 1-4, wherein the flange portion has a flange that extends horizontally beyond the web portion.
8. The fabricated vibration isolation barrier of any one of claims 1 to 4, wherein the web portions and the flange portions are made of concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910981067.0A CN110761132A (en) | 2019-10-15 | 2019-10-15 | Assembled vibration isolation barrier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910981067.0A CN110761132A (en) | 2019-10-15 | 2019-10-15 | Assembled vibration isolation barrier |
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| CN110761132A true CN110761132A (en) | 2020-02-07 |
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| CN201910981067.0A Pending CN110761132A (en) | 2019-10-15 | 2019-10-15 | Assembled vibration isolation barrier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111519668A (en) * | 2020-05-28 | 2020-08-11 | 张延年 | Sandwich multilayer assembled vibration isolation trench |
| CN113216279A (en) * | 2021-05-26 | 2021-08-06 | 华东交通大学 | Horizontal hollow pipe landfill vibration isolation barrier and construction process thereof |
| CN115467375A (en) * | 2022-10-20 | 2022-12-13 | 深圳宏业基岩土科技股份有限公司 | Construction method of vibration isolation structure arranged between supporting structure and existing building |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111519668A (en) * | 2020-05-28 | 2020-08-11 | 张延年 | Sandwich multilayer assembled vibration isolation trench |
| CN113216279A (en) * | 2021-05-26 | 2021-08-06 | 华东交通大学 | Horizontal hollow pipe landfill vibration isolation barrier and construction process thereof |
| CN113216279B (en) * | 2021-05-26 | 2022-12-13 | 华东交通大学 | Horizontal hollow pipe landfill vibration isolation barrier and construction process thereof |
| CN115467375A (en) * | 2022-10-20 | 2022-12-13 | 深圳宏业基岩土科技股份有限公司 | Construction method of vibration isolation structure arranged between supporting structure and existing building |
| CN115467375B (en) * | 2022-10-20 | 2023-12-08 | 深圳宏业基岩土科技股份有限公司 | Construction method of vibration isolation structure arranged between supporting structure and existing building |
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