Laminated vibration absorption and isolation trench structure

Abstract

The laminated vibration absorption and isolation trench structure 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 located on the upper portion of the heel plate and on the outer side of the vertical plate and comprises a flexible cushion layer, a rigid restraint layer and a soil covering 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] The invention relates to the field related to vibration reduction structures, in particular to a laminated vibration absorption and isolation groove structure. Background Art

[0002] For equipment and facilities with vibration index requirements, when the vibration source cannot be adjusted, the commonly used vibration reduction measures include: vibration isolation, dynamic vibration absorption, and damping vibration reduction. Among them, vibration isolation refers to the vibration control of the vibration input path. Ground barrier vibration isolation is a more commonly used measure. The specific forms include vibration isolation trenches, vibration isolation piles, underground continuous walls, etc. Dynamic vibration absorption specifically refers to adding a subsystem to the controlled object so that the vibration of a certain frequency can be controlled.

[0003] However, for equipment foundations that use a combination of block foundations and pile foundations, the vibration isolation effect of the vibration isolation trench is relatively limited. Based on the limited vibration isolation effect, how to further control the amplitude of the frequency band of interest through construction is something that needs to be optimized. Summary of the invention

[0004] The object of the present invention is to provide a laminated vibration absorbing and isolating groove structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a laminated vibration absorption and isolation trench structure, comprising an earth retaining vibration isolation structure, an additional laminated vibration absorption structure and an equipment foundation, wherein the top of the earth retaining vibration isolation structure is connected to the equipment foundation through a top cover, the bottom of the earth retaining vibration isolation structure is connected to the equipment foundation through a flexible water stop, and the additional laminated vibration absorption structure is buried in the soil;

[0006] The soil retaining vibration isolation structure is composed of a vertical plate, a toe plate and a heel plate. The two sides of the bottom of the vertical plate surface are respectively connected with the toe plate and the heel plate. The top of the vertical plate is connected to the top cover, the toe plate is connected to the flexible water stop strip, and the heel plate is located at the bottom of the additional laminated vibration absorption structure.

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

[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 the top cover, and one side of the bottom of the block foundation is connected to a flexible water stop.

[0009] Preferably, the top cover is composed of a rigid cover plate and a flexible connection, the edge of the rigid cover plate is provided with a flexible connection, and the flexible connection is respectively connected to the massive foundation and the vertical plate.

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

[0011] Preferably, the vertical vibration absorption main frequency and the horizontal vibration absorption main frequency of the additional laminated vibration absorption structure are as follows: assuming that the height of the covering mass body is h, the bottom width is b, the top width is b+h, and the density is ρ, then the mass of the covering mass body along the unit length is M=(2b+h)hρ / 2; assuming that the elastic modulus of the flexible cushion layer is E, the shear modulus is G, and the bottom thickness is d z , the thickness of one side of the vertical plate is d h1 , the thickness of the hypotenuse is d h2 , then the vertical stiffness per unit length is approximately The horizontal stiffness per unit length is approximately The vertical vibration absorption main frequency of the additional laminated vibration absorption structure is about The main frequency of horizontal vibration absorption of the additional laminated vibration absorption structure is about

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: on the one hand, the laminated vibration-absorbing and vibration-isolating ditch structure of the present invention isolates the vibration energy of the target controlled body input from the outside through the earth-retaining vibration-isolating structure and ensures the static stability of the vibration-isolating ditch; on the other hand, the vibration energy of some frequency bands in the environmental vibration is absorbed through the resonance of the additional laminated structure, thereby blocking the energy of a specific frequency band from being transmitted to the target controlled body, and improving the vibration reduction effect of the frequency band of concern. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the laminated vibration absorption and isolation groove structure and equipment foundation of the present invention;

[0014] Figure 2 It is a schematic detailed diagram of the laminated vibration absorbing and isolating groove structure of the present invention.

[0015] In the figure: 1. soil retaining and vibration isolation structure; 11. vertical plate; 12. toe plate; 13. heel plate; 2. additional laminated vibration absorption structure; 21. flexible cushion layer; 22. rigid constraint layer; 23. covering soil mass; 3. equipment foundation; 31. block foundation; 32. pile foundation; 4. top cover; 41. rigid cover plate; 42. flexible connection; 5. flexible water stop; 6. soil. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] See also Figure 1-2 The present invention provides a technical solution: a laminated vibration absorption and isolation trench structure, comprising an earth-retaining vibration isolation structure 1, an additional laminated vibration absorption structure 2 and an equipment foundation 3, the top of the earth-retaining vibration isolation structure 1 is connected to the equipment foundation 3 through a top cover 4, the bottom of the earth-retaining vibration isolation structure 1 is connected to the equipment foundation 3 through a flexible water stop 5, and the additional laminated vibration absorption structure 2 is buried in the soil 6;

[0020] The soil 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 both sides of the bottom 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 water stop 5, and the heel plate 13 is located at the bottom of the additional laminated vibration absorption structure 2.

[0021] The additional laminated vibration absorbing structure 2 is composed of a flexible cushion layer 21, a rigid constraint layer 22, and a soil mass body 23. The flexible cushion layer 21 is laid on the surface of the vertical plate 11, the heel plate 13 and the soil body 6. The rigid constraint layer 22 is laid on the surface of the flexible cushion layer 21, and the rigid constraint layer 22 is filled with the soil mass body 23.

[0022] The equipment foundation 3 is composed of a block foundation 31 and a pile foundation 32. The pile foundation 32 is arranged at the bottom of the block foundation 31. The top side of the block foundation 31 is connected to the top cover 4. The bottom side of the block foundation 31 is connected to the flexible water stop 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 , and the flexible connection 42 is respectively connected to the massive foundation 31 and the vertical plate 11 .

[0024] Furthermore, the entire structure cross section of the additional laminated vibration absorbing structure 2 is an inverted trapezoid

[0025] Furthermore, the vertical vibration absorption main frequency and the horizontal vibration absorption main frequency of the additional laminated vibration absorption structure 2 are specifically as follows: the height of the soil mass body 23 is set to h, the bottom width is b, the top width is b+h, and the density is ρ, then the mass of the soil mass body 23 along the unit length is M=(2b+h)hρ / 2; the elastic modulus of the flexible cushion layer 21 is set to E, the shear modulus is set to G, and the bottom thickness is set to d z , the thickness of one side of the vertical plate is d h1 , the thickness of the hypotenuse is d h2 , then the vertical stiffness per unit length is approximately The horizontal stiffness per unit length is approximately The vertical vibration absorption main frequency of the additional laminated vibration absorption structure 2 is about The main frequency of the additional laminated vibration absorption structure 2 is about

[0026] The specific embodiments are as follows:

[0027] The laminated vibration-absorbing and vibration-isolating trench structure includes a retaining vibration-isolating structure 1 and an additional laminated vibration-absorbing structure 2. The top of the retaining vibration-isolating structure 1 is connected to the equipment foundation 3 through a top cover 4 to prevent people and items from falling; the bottom of the retaining vibration-isolating structure 1 is connected to the equipment foundation 3 through a flexible water-stop 5 to prevent water from penetrating into the vibration-isolating trench cavity. The additional laminated vibration-absorbing structure 2 is buried in the soil 6.

[0028] The retaining vibration isolation structure 1 is composed of a vertical plate 11, a toe plate 12, and a heel plate 13, and is cast in concrete; the additional laminated vibration absorption structure 2 is located on the upper part of the heel plate 13 and the outer side of the vertical plate 11, and is composed of a flexible cushion layer 21, a rigid constraint layer 22, and a covering mass body 23. The covering mass body 23 comes from the backfill of the soil body 6. The height of the covering mass body 23 is set to h = 2.8m, the bottom width is b = 2.8m, the top width is b + h = 5.6m, and the density is ρ = 2000kg / m 3 , then the mass of the covering mass body 23 per unit length is M = (2b + h) hρ / 2 = (5.6 + 2.8) × 2.8 × 2000 / 2 = 23520 kg. Assume that the elastic modulus of the flexible cushion layer 21 is E = 1 × 10 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, the thickness 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 main frequency of the additional laminated vibration absorption structure is about Horizontal vibration absorption main frequency is about

[0029] The laminated vibration-absorbing and vibration-isolating trench structure of the present invention, on the one hand, isolates the vibration energy of the target controlled body input from the outside through the earth-retaining vibration-isolating structure and ensures the static stability of the vibration-isolating trench; on the other hand, it absorbs the vibration energy of some frequency bands in the environmental vibration through the resonance of the additional laminated structure, blocks the energy of the specific frequency band from being transmitted to the target controlled body, and improves the vibration reduction effect of the frequency band of concern.

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

Claims

1. A laminated vibration absorbing and isolating trench structure, comprising a retaining vibration isolating structure (1), an additional laminated vibration absorbing structure (2) and an equipment foundation (3), characterized in that: The top of the soil retaining and vibration isolation structure (1) is connected to the equipment foundation (3) via a top cover (4), the bottom of the soil retaining and vibration isolation structure (1) is connected to the equipment foundation (3) via a flexible water stop strip (5), and the additional laminated vibration absorption structure (2) is buried in the soil (6); The soil 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 both sides of the bottom 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 water stop (5); and the heel plate (13) is located at the bottom of the additional laminated vibration absorption structure (2); The additional laminated vibration absorbing structure (2) is composed of a flexible cushion layer (21), a rigid constraint layer (22), and a soil mass body (23); the flexible cushion layer (21) is laid on the surface of the vertical plate (11), the heel plate (13), and the soil body (6); the rigid constraint layer (22) is laid on the surface of the flexible cushion layer (21); and the rigid constraint layer (22) is filled with the soil mass body (23); The equipment foundation (3) is composed of a block foundation (31) and a pile foundation (32); the pile foundation (32) is arranged at the bottom of the block foundation (31); 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 water stop strip (5).

2. The laminated vibration absorbing and isolating groove 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), and the flexible connection (42) is respectively connected to the large block foundation (31) and the vertical plate (11).

3. The laminated vibration absorbing and isolating groove structure according to claim 1, characterized in that: The entire structural cross-section of the additional laminated vibration absorbing structure (2) is an inverted trapezoid.

4. The laminated vibration absorbing and isolating groove structure according to claim 1, characterized in that: The vertical vibration absorption main frequency and the horizontal vibration absorption main frequency of the additional laminated vibration absorption structure (2) are specifically as follows: the height of the soil-covering mass body (23) is set to h, the bottom width is b, the top width is b+h, and the density is ρ, then the mass per unit length of the soil-covering mass body (23) is M=(2b+h)hρ / 2; the elastic modulus of the flexible cushion layer (21) is set to E, the shear modulus is set to G, and the bottom thickness is set to d z , the thickness of one side of the vertical plate is d h1 , the thickness of the hypotenuse is d h2 , then the vertical stiffness per unit length is approximately The horizontal stiffness per unit length is approximately Then the vertical vibration absorption main frequency of the additional laminated vibration absorption structure (2) is about The main frequency of the additional laminated vibration absorbing structure (2) in horizontal direction is about

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