Vibration reduction damper and basement wall damping vibration reduction structure

Abstract

The utility model relates to a vibration attenuation damper and a basement wall damping vibration attenuation structure. The vibration reduction damper comprises an embedded plate, a spring and a cap, and the bottom end of the spring is fixed to the surface of the embedded plate. The top end of the spring is connected with the cover cap, the cover cap is buckled on the surface of the embedded plate, and the brim of the cover cap is movably embedded into the surface of the embedded plate. The vibration reduction damper and the retaining wall can be placed underground together, so that the vibration effect transmitted from the soil body is reduced, and the vibration influence on a basement is reduced.

Description

Technical Field

[0001] The utility model relates to a vibration reduction measure for underground buildings, in particular to a vibration reduction damper and a basement wall damping vibration reduction structure. Background Art

[0002] As the urbanization rate increases, various vibration sources such as roads, railways, construction, and power machinery will generate environmental vibrations that cannot be ignored. At the same time, the use of building basements is becoming more and more widespread. Therefore, it is of great significance to consider how to reduce or avoid the impact and harm of ambient vibration on building basements.

[0003] In this regard, the most widely used is the vibration isolation trench. The application of the vibration isolation trench technology aims to reduce the energy transmitted to the building or infrastructure structure by earthquakes or other vibrations, thereby improving its stability and safety under earthquakes or other vibration conditions. Traditional vibration isolation trenches can be mainly divided into empty trenches and filled trenches. When the depth of the vibration isolation empty trench is shallow, the vibration isolation effect is poor, but if the design depth is increased, it will bring greater construction difficulties, and the side wall of the vibration isolation trench will be unstable due to the soil pressure. Although the use of filled trenches can solve the support problem of the side wall, the vibration reduction effect of the filled trench is worse than that of the empty trench. Therefore, the selection of vibration isolation trenches has become a difficult problem to solve. In addition, the design method of vibration isolation trenches in domestic specifications is not perfect, and no specific design formula for vibration isolation trenches is given. Moreover, the academic community lacks extensive research on the structural form of vibration isolation trenches, which is limited to the study of the geometric structural parameters such as trench depth and trench width and the vibration reduction effect of the filling material in the trench. The structural form of the vibration isolation trench lacks innovation.

[0004] Therefore, the utility model aims at the above-mentioned deficiencies in the prior art and takes a different approach by designing a vibration reduction damper for use in basement vibration reduction of buildings. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0006] Based on this, the utility model proposes a novel vibration reduction damper, which can be placed underground together with the retaining wall to reduce the vibration effect transmitted from the soil, so as to alleviate the vibration impact on the basement.

[0007] To achieve the above-mentioned purpose, the technical solution of the utility model is: a vibration damper, including a panel, a spring and a cap, the bottom end of the spring is fixed to the surface of the panel; the top end of the spring is connected to the cap, the cap is buckled on the surface of the panel, and the brim of the cap can be movably embedded in the surface of the panel.

[0008] In the vibration damper of the utility model, the cap is connected to the spring and provides a supporting function, so that the mass of the soil can be concentrated on the cap surface, thereby generating a corresponding inertial force in the vibration, and then the spring can play a vibration reduction role in the vibration. The stiffness of the spring can be selected within a reasonable range to ensure good deformation performance while also requiring a certain stiffness to support the cap.

[0009] In one of the solutions, a groove corresponding to the cap is provided on the surface of the panel, the brim of the cap is located in the groove, and the distance between the bottom of the brim and the bottom of the groove is ≥2mm to ensure that there is a certain space for the extension and compression of the spring.

[0010] Preferably, the groove has a depth of 4 mm, and the distance between the bottom of the cap edge and the bottom of the groove is 2 mm. This can prevent soil from entering the damper and affecting the action of the spring, and limit the displacement change of the cap, so that it can only rotate in the groove under the vibration of the soil, thereby achieving vibration reduction effects from different directions.

[0011] Preferably, the cap is hemispherical, which can make the vibration more evenly distributed and reduce the reflection of vibration waves while increasing the absorption area. Moreover, the hemispherical structure is more stable and not easy to deform.

[0012] Preferably, the top end of the spring is connected to the cap by welding, and the overall strength of the connection is durable.

[0013] Preferably, the outer surface of the cap is provided with an anti-corrosion material layer to ensure that the device will not be damaged by rust during long-term use in an underground environment.

[0014] Preferably, a hollow steel tube is further sleeved in the spring, the length of the hollow steel tube is less than the length of the spring in the natural state, and the end of the hollow steel tube facing the cap is a free end, and the end facing away from the cap is fixed to the panel to further improve the strength.

[0015] Another aspect of the utility model provides a basement wall damping and vibration reduction structure, which includes adjacent basement walls and retaining walls in sequence, wherein the retaining wall is provided with the above-mentioned vibration reduction damper on the side facing away from the basement wall, and the vibration reduction damper is embedded and fixed in the retaining wall through the panel.

[0016] During use, based on the local resonance theory of phononic crystals, the damper and the soil near it can achieve resonance under certain conditions, thereby greatly consuming the energy of the waves transmitted from the soil. At this time, the damper is equivalent to artificial aggregate added to the soil. When excited by a frequency close to the natural frequency of the damper, the spring in the damper vibrates locally, and there is a phase difference between the movement of the soil and the damper, resulting in a band gap within a certain frequency range, thereby attenuating the power input of the frequency within the band gap. The vibration period of the spring can be controlled by adjusting its stiffness, thereby controlling the vibration frequency, and then the vibration frequency of the damper can be controlled to be close to the natural frequency of the soil, thereby achieving the effect of self-vibration, and the resonance between the damper and the soil can be used to greatly dissipate the energy input in the soil, thereby protecting the retaining wall and achieving a good vibration reduction effect.

[0017] Preferably, when the retaining wall has a size of 4500mm×5000mm and the vibration damper panel has a size of 1200mm×1200mm, 12 dampers in total are arranged in three rows and four columns on the retaining wall, which has a better vibration reduction effect and a more appropriate cost.

[0018] Preferably, a waterproof layer is provided between the retaining wall and the basement wall.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model proposes a novel vibration damper, including an inlay plate, a spring and a cap, which can be fixed in a retaining wall through the inlay plate, and the cap is connected to the spring and provides a supporting function, so that the mass of the soil can be concentrated on the cap surface, thereby generating a corresponding inertial force in the vibration, and then the spring can play a vibration reduction role in the vibration. The vibration damper of the utility model can be placed underground together with the retaining wall to reduce the vibration effect transmitted from the soil, so as to reduce the vibration impact on the basement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the schematic diagrams of the vibration damper of the embodiment of the utility model;

[0022] Figure 2 This is the second schematic diagram of the vibration damper of the embodiment of the utility model;

[0023] Figure 3 This is the third schematic diagram of the vibration damper of the embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the basement wall damping and vibration reduction structure according to an embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Combination Figure 1-2 A vibration damper 1 includes a panel 2, a spring 3 and a cap 4, wherein the bottom end of the spring 3 is fixed to the surface of the panel 2; the top end of the spring 3 is connected to the cap 4, the cap 4 is buckled on the surface of the panel 2, and the brim of the cap 4 is movably embedded in the surface of the panel 2.

[0027] In one embodiment, a groove 5 corresponding to the cap 4 is provided on the surface of the panel 2, the brim of the cap 4 is located in the groove 5, and the distance between the bottom of the brim and the bottom of the groove is ≥2mm to ensure that there is a certain space for the extension and compression of the spring 3.

[0028] Preferably, the depth of the groove 5 is 4 mm, and the distance between the bottom of the cap edge and the bottom of the groove is 2 mm. This can prevent soil from entering the damper and affecting the action of the spring, and limit the displacement change of the cap, so that it can only rotate in the groove under the vibration of the soil, thereby achieving vibration reduction effects from different directions.

[0029] In one embodiment, the cap 4 is hemispherical. The cap is designed to be hemispherical, which has the following effects:

[0030] 1) Evenly distribute vibration: The hemispherical surface can distribute vibration more evenly. Compared with a flat surface, it can reduce the concentration of vibration on the surface, thereby reducing the impact of local vibration on the soil and making the vibration wave more effectively absorbed and blocked.

[0031] 2) Reduce reflection: The hemispherical surface can reduce the reflection of vibration waves. Compared with the flat surface, its curved surface shape can more effectively absorb or refract vibration waves to other directions, reduce the reflection and propagation of vibration waves in the soil, and improve the damping effect.

[0032] 3) Increase the absorption area: Due to the shape of the hemispherical surface, its surface area is larger than that of a flat surface, which can provide more surface for absorbing and dispersing vibration waves, thereby increasing the absorption capacity of the damper and improving the attenuation effect of vibration waves.

[0033] 4) More stable fixation: The hemispherical surface is more firmly fixed in the soil and is less likely to be moved or deformed by the movement or pressure of the soil than a flat surface, so the damper effect can be maintained for a longer period of time.

[0034] In one of the embodiments, the top end of the spring 3 is connected to the cap 4 by welding to ensure the overall strength of the connection and prevent it from being damaged under long-term vibration conditions.

[0035] In one embodiment, the outer surface of the cap 4 is provided with an anti-corrosion material layer to ensure that the device will not be damaged by rust during long-term use in an underground environment.

[0036] In one embodiment, a hollow steel tube 6 is also provided inside the spring 3. Figure 3 , further improving the strength.

[0037] Since the damper is installed on the retaining wall, due to the weight of the cap itself, the spring itself is sometimes unable to bear the weight of the cap and itself, and is easily deformed downward, thus affecting the use effect of the damper. By putting a hollow steel pipe on the spring and fixing it together with the cap on the retaining wall, it will not affect the normal performance of the spring, and can also ensure that the damper will not have obvious vertical deformation on the retaining wall, thus affecting the vibration reduction performance. It is worth noting that the steel pipe is not connected to the cap, and the length of the steel pipe should be slightly shorter than the length of the spring in its natural state, so as not to affect the expansion and contraction of the spring. If it is fixed in contact with the cap, the spring will lose its function, and the damper cannot absorb the energy of the vibration wave transmitted from the soil through the expansion and contraction of the spring.

[0038] Reference Figure 4 A basement wall damping and vibration reduction structure comprises adjacent basement walls 8 and retaining walls 7 in sequence. A vibration reduction damper 1 is arranged on the side of the retaining wall 7 facing away from the basement wall 8. The vibration reduction damper 1 is embedded and fixed in the retaining wall 7 through a panel 2.

[0039] During use, based on the local resonance theory of phononic crystals, the damper and its nearby soil can achieve resonance under certain conditions, thereby greatly consuming the energy of the waves transmitted from the soil. According to the formula and

[0040] Where: T is the vibration period of the damper, m is the mass of the damper itself, k is the stiffness of the damper itself, and f is the vibration frequency of the damper.

[0041] At this time, the damper is equivalent to the artificial aggregate added to the soil. When it is excited by a frequency close to the natural frequency of the damper, the spring in the damper vibrates locally, and there is a phase difference between the movement of the soil and the damper, which produces a band gap within a certain frequency range, thereby attenuating the power input of the frequency within the band gap. The vibration period T can be controlled by adjusting the stiffness k of the spring, thereby controlling the vibration frequency f, and then the vibration frequency of the damper can be controlled to be close to the natural frequency of the soil, thereby achieving the effect of self-vibration, and the resonance between the damper and the soil can be used to greatly dissipate the energy input in the soil, thereby protecting the retaining wall and achieving a good vibration reduction effect.

[0042] In one embodiment, when the retaining wall 7 has a size of 4500mm×5000mm and the vibration damper panel 2 has a size of 1200mm×1200mm, there are 12 dampers 1 arranged in three rows and four columns on the retaining wall 7, which has a good vibration reduction effect and a suitable cost. If the number is too large, the vibration reduction effect can be achieved but it is not economical. The number should not be too small either, because the vibration waves transmitted in the soil are almost absorbed and dissipated by the damper, so a certain vibration reduction performance should be guaranteed.

[0043] In one embodiment, a waterproof layer is provided between the retaining wall 7 and the basement wall 8 .

[0044] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A vibration damper, characterized in that: It includes a panel, a spring and a cap, wherein the bottom end of the spring is fixed on the panel surface; the top end of the spring is connected to the cap, the cap is buckled on the panel surface, and the brim of the cap can be movably embedded in the panel surface.

2. The vibration damper according to claim 1, characterized in that: The surface of the panel is provided with a groove corresponding to the cap, the brim of the cap is located in the groove, and the distance between the bottom of the brim and the bottom of the groove is ≥2mm.

3. The vibration damper according to claim 2, characterized in that: The depth of the groove is 4 mm, and the distance between the bottom of the brim and the bottom of the groove is 2 mm.

4. The vibration damper according to claim 1, characterized in that: The cap is hemispherical.

5. The vibration damper according to claim 1, characterized in that: The top end of the spring is connected to the cap by welding.

6. The vibration damper according to claim 1, characterized in that: The outer surface of the cap is provided with an anti-corrosion material layer.

7. The vibration damper according to any one of claims 1 to 6, characterized in that: A hollow steel tube is also sleeved in the spring, the length of the hollow steel tube is less than the length of the spring in the natural state, and the end of the hollow steel tube facing the cap is a free end, and the end facing away from the cap is fixed on the panel.

8. A basement wall damping vibration reduction structure, characterized in that: It comprises adjacent basement walls and retaining walls in sequence, wherein a vibration-damping damper as claimed in any one of claims 1 to 7 is arranged on a side of the retaining wall facing away from the basement wall, and the vibration-damping damper is embedded and fixed in the retaining wall through the panel.

9. The basement wall damping and vibration reduction structure according to claim 8, characterized in that: When the size of the retaining wall is 4500 mm×5000 mm and the size of the vibration damper panel is 1200 mm×1200 mm, three rows and four columns of 12 dampers in total are arranged on the retaining wall.

10. The basement wall damping and vibration reduction structure according to claim 8, characterized in that: A waterproof layer is also provided between the retaining wall and the basement wall.

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