Laminated vibration absorption and isolation trench structure

Abstract

The utility model relates to a laminated vibration absorption and isolation trench structure, which comprises a soil retaining and vibration isolation structure and an additional laminated vibration absorption structure, the soil retaining and vibration isolation structure comprises a vertical plate, a toe plate and a heel plate, and the additional laminated vibration absorption structure is positioned on the upper part of the heel plate and on the outer side of the vertical plate and comprises a flexible cushion layer, a rigid restraint layer and an earthing mass body. According to the laminated vibration absorption and isolation trench structure, on one hand, vibration energy of a target controlled body input from the outside is isolated through the soil retaining and vibration isolation structure, and static stability of the vibration isolation trench is guaranteed, and on the other hand, vibration energy of a part of frequency bands in environmental vibration is absorbed through resonance of the additional laminated structure. Energy of the specific frequency band is blocked from being transmitted to the target control body, and the vibration reduction effect of the concerned frequency band is improved.

Description

Technical Field

[0001] This utility model relates to the field of vibration reduction structures, specifically a layered vibration absorption and isolation trench structure. Background Technology

[0002] For equipment and facilities with vibration control requirements, when the vibration source cannot be adjusted, common vibration reduction measures include vibration isolation, dynamic vibration absorption, and damping vibration reduction. Vibration isolation refers to controlling the vibration input path; ground-based barrier vibration isolation is a commonly used measure, specifically including vibration isolation trenches, vibration isolation piles, and diaphragm walls. Dynamic vibration absorption specifically refers to adding a subsystem to the controlled object to control vibration at a certain frequency.

[0003] However, for equipment foundations that combine large-block foundations and pile foundations, the vibration isolation effect of vibration isolation trenches is relatively limited. Given the limited vibration isolation effect, how to further control the amplitude of the frequency band of concern through structural design is an area that needs optimization. Utility Model Content

[0004] The purpose of this invention is to provide a layered vibration absorption and isolation trench structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a layered vibration-absorbing and vibration-isolating trench structure, comprising a soil-retaining vibration isolation structure, an additional layered vibration-absorbing structure, and an equipment foundation. The top of the soil-retaining vibration isolation structure is connected to the equipment foundation through a top cover, and the bottom of the soil-retaining vibration isolation structure is connected to the equipment foundation through a flexible waterstop. The additional layered vibration-absorbing structure is buried in the soil.

[0006] The retaining vibration isolation structure consists of a vertical plate, a toe plate, and a heel plate. The toe plate and the heel plate are respectively connected to the bottom two sides of the surface of the vertical plate. The top of the vertical plate is connected to the top cover. The toe plate is connected to the flexible waterstop. The heel plate is located at the bottom of the additional layered vibration absorption structure.

[0007] The additional layered vibration absorption structure consists of a flexible cushion layer, a rigid constraint layer, and a soil mass. The flexible cushion layer is laid on the vertical plate, the heel plate, and the soil surface. The rigid constraint layer is laid on the surface of the flexible cushion layer, and the rigid constraint layer is filled with a soil mass.

[0008] The equipment foundation consists of a block foundation and a pile foundation. The bottom of the block foundation is provided with a pile foundation, one side of the top of the block foundation is connected to a top cover, and one side of the bottom of the block foundation is connected to a flexible waterstop.

[0009] Preferably, the top cover is composed of a rigid cover plate and flexible connections. The rigid cover plate has flexible connections at its edges, and the flexible connections are respectively connected to the large-block foundation and the vertical slab.

[0010] Preferably, the cross-section of the additional layered vibration-absorbing structure is an inverted trapezoid.

[0011] Preferably, the vertical and horizontal vibration absorption frequencies of the additional layered vibration absorption structure are as follows: Let the height of the soil cover mass be h, the bottom width be b, the top width be b+h, and the density be ρ. Then, the mass per unit length of the soil cover mass is M = (2b+h)hρ / 2; let the elastic modulus of the flexible cushion layer be E, the shear modulus be G, and the bottom thickness be d. z The thickness of one side of the upright plate is d h1 The thickness of one side of the hypotenuse is d. h2 The vertical stiffness per unit length is approximately The horizontal stiffness per unit length is approximately The vertical vibration absorption dominant frequency of the additional layered vibration absorption structure is approximately The horizontal vibration absorption frequency of the additional layered vibration absorption structure is approximately

[0012] Compared with the prior art, the beneficial effects of this utility model are: the stacked vibration absorption and isolation trench structure of this utility model isolates the vibration energy of the target controlled body input from the outside through the soil retaining and vibration isolation structure, and ensures the static stability of the isolation trench. On the other hand, it absorbs the vibration energy of some frequency bands in the environment through the resonance of the additional stacked structure, blocks the transmission of energy of specific frequency bands to the target controlled body, and improves the vibration reduction effect of the frequency band of interest. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the stacked vibration absorption and isolation trench structure and equipment foundation of this utility model;

[0014] Figure 2 This is a detailed schematic diagram of the stacked vibration absorption and isolation trench structure of this utility model.

[0015] In the diagram: 1. Retaining structure for vibration isolation; 11. Vertical plate; 12. Toe plate; 13. Heel plate; 2. Additional layered vibration absorption structure; 21. Flexible cushion layer; 22. Rigid restraint layer; 23. Cover mass; 3. Equipment foundation; 31. Block foundation; 32. Pile foundation; 4. Top cover; 41. Rigid cover plate; 42. Flexible connection; 5. Flexible waterstop; 6. Soil. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] Please see Figure 1-2 This utility model provides a technical solution: a layered vibration absorption and isolation trench structure, including a soil retaining and vibration isolation structure 1, an additional layered vibration absorption structure 2 and an equipment foundation 3. The top of the soil retaining and vibration isolation structure 1 is connected to the equipment foundation 3 through a top cover 4, and the bottom of the soil retaining and vibration isolation structure 1 is connected to the equipment foundation 3 through a flexible waterstop 5. The additional layered vibration absorption structure 2 is buried in the soil 6.

[0020] The retaining vibration isolation structure 1 consists of a vertical plate 11, a toe plate 12, and a heel plate 13. The toe plate 12 and the heel plate 13 are respectively connected to the bottom two sides of the surface of the vertical plate 11. The top of the vertical plate 11 is connected to the top cover 4. The toe plate 12 is connected to the flexible waterstop 5. The heel plate 13 is located at the bottom of the additional layered vibration absorption structure 2.

[0021] The additional layered vibration absorption structure 2 consists of a flexible cushion layer 21, a rigid constraint layer 22, and a soil mass 23. The flexible cushion layer 21 is laid on the surface of the vertical plate 11, the heel plate 13, and the soil 6. The rigid constraint layer 22 is laid on the surface of the flexible cushion layer 21, and the soil mass 23 is filled inside the rigid constraint layer 22.

[0022] The equipment foundation 3 consists of a block foundation 31 and a pile foundation 32. The bottom of the block foundation 31 is provided with the pile foundation 32. One side of the top of the block foundation 31 is connected to the top cover 4, and one side of the bottom of the block foundation 31 is connected to the flexible waterstop 5.

[0023] Furthermore, the top cover 4 is composed of a rigid cover plate 41 and a flexible connection 42. The edge of the rigid cover plate 41 is provided with a flexible connection 42, which is connected to the large block foundation 31 and the vertical plate 11 respectively.

[0024] Furthermore, the additional layered vibration-absorbing structure 2 has an inverted trapezoidal cross-section.

[0025] Furthermore, the vertical and horizontal vibration absorption frequencies of the additional layered vibration absorption structure 2 are as follows: Let the height of the soil-covered mass body 23 be h, the bottom width be b, the top width be b+h, and the density be ρ. Then, the mass per unit length of the soil-covered mass body 23 is M = (2b+h)hρ / 2; let the elastic modulus of the flexible cushion layer 21 be E, the shear modulus be G, and the bottom thickness be d. z The thickness of one side of the upright plate is d h1 The thickness of one side of the hypotenuse is d. h2 The vertical stiffness per unit length is approximately The horizontal stiffness per unit length is approximately The vertical vibration absorption dominant frequency of the additional layered vibration absorption structure 2 is approximately Additional layered vibration absorption structure 2 has a horizontal vibration absorption main frequency of approximately

[0026] The specific implementation examples are as follows:

[0027] The layered vibration isolation trench structure includes a retaining vibration isolation structure 1 and an additional layered vibration absorption structure 2. The top of the retaining vibration isolation structure 1 is connected to the equipment foundation 3 via a top cover 4 to prevent personnel and materials from falling; the bottom of the retaining vibration isolation structure 1 is connected to the equipment foundation 3 via a flexible waterstop 5 to prevent water seepage into the trench cavity. The additional layered vibration absorption structure 2 is embedded in the soil 6.

[0028] The retaining vibration isolation structure 1 consists of a vertical plate 11, a toe plate 12, and a heel plate 13, and is constructed using concrete casting. The additional layered vibration absorption structure 2 is located above the heel plate 13 and outside the vertical plate 11. It consists of a flexible cushion layer 21, a rigid restraint layer 22, and a backfill mass 23, which originates from the backfill soil of soil mass 6. The backfill mass 23 is defined as having a height of h = 2.8m, a bottom width of b = 2.8m, a top width of b + h = 5.6m, and a density of ρ = 2000 kg / m³. 3 Therefore, the mass per unit length of the soil cover 23 is M = (2b + h)hρ / 2 = (5.6 + 2.8) × 2.8 × 2000 / 2 = 23520 kg. Let the elastic modulus of the flexible cushion layer 21 be E = 1 × 10⁻⁶. 0 N / m 2 The bottom thickness is d z =0.1m, thickness of one side of the vertical plate is d h1 =0.1m, thickness on one side of the hypotenuse is d h2 =0.1m, then the vertical stiffness per unit length is approximately The horizontal stiffness per unit length is approximately The vertical vibration absorption dominant frequency of the additional layered vibration absorption structure is approximately The horizontal vibration absorption frequency is approximately

[0029] The layered vibration absorption and isolation trench structure of this utility model isolates the vibration energy of the target controlled body input from the outside through the soil retaining and vibration isolation structure, and ensures the static stability of the isolation trench. On the other hand, it absorbs the vibration energy of some frequency bands in the environment through the resonance of the additional layered structure, blocks the transmission of energy of specific frequency bands to the target controlled body, and improves the vibration reduction effect of the frequency band of interest.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A layered vibration-absorbing and vibration-isolating trench structure, comprising a retaining vibration isolation structure (1), an additional layered vibration-absorbing structure (2), and an equipment foundation (3), characterized in that: The top of the retaining vibration isolation structure (1) is connected to the equipment foundation (3) through a top cover (4), the bottom of the retaining vibration isolation structure (1) is connected to the equipment foundation (3) through a flexible waterstop (5), and the additional layered vibration absorption structure (2) is buried in the soil (6). The retaining vibration isolation structure (1) is composed of a vertical plate (11), a toe plate (12), and a heel plate (13). The toe plate (12) and the heel plate (13) are respectively connected to the bottom sides of the surface of the vertical plate (11). The top of the vertical plate (11) is connected to the top cover (4). The toe plate (12) is connected to the flexible waterstop (5). The heel plate (13) is located at the bottom of the additional layered vibration absorption structure (2). The additional layered vibration absorption structure (2) consists of a flexible cushion layer (21), a rigid constraint layer (22), and a soil mass (23). The flexible cushion layer (21) is laid on the surface of the vertical plate (11), the heel plate (13), and the soil (6). The surface of the flexible cushion layer (21) is covered with a rigid constraint layer (22), and the rigid constraint layer (22) is filled with a soil mass (23). The equipment foundation (3) consists of a block foundation (31) and a pile foundation (32). The bottom of the block foundation (31) is provided with a pile foundation (32). The top side of the block foundation (31) is connected to the top cover (4), and the bottom side of the block foundation (31) is connected to a flexible waterstop (5).

2. The laminated vibration absorption and isolation trench structure according to claim 1, characterized in that: The top cover (4) is composed of a rigid cover plate (41) and a flexible connection (42). The edge of the rigid cover plate (41) is provided with a flexible connection (42), which is connected to the large block foundation (31) and the upright plate (11) respectively.

3. The laminated vibration absorption and isolation trench structure according to claim 1, characterized in that: The cross-section of the additional layered vibration-absorbing structure (2) is an inverted trapezoid.

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