RU176003U1 - SCREEN TO PROTECT BUILDINGS AND STRUCTURES FROM VIBRATIONS - Google Patents

Abstract

The utility model relates to the field of construction, to protecting the foundations of buildings and structures from the effects of various types of vibrations, to screening the wave action from various sources of vibrations. The screen includes a continuous gap, which is filled with a layer of material with high acoustic rigidity (for example, fiberglass panels) with side of the vibration source, which is a reflector of waves, and on the side of the protected object - a layer of material with low acoustic rigidity (for example, rubber panels), which I wish to set up a damper, shock absorber. Between the layers of materials are fixed horizontal spring elements. Panels with high acoustic rigidity are connected by rubber gaskets along the length of the slit. A layer of damping material is laid at the bottom of the slit, and then fiberglass panels. The walls and bottom of the slit are provided with a layer of waterproofing, and the upper part of the slit is overlapped. The technical result is a decrease in the intensity of the wave action of vibrations and a decrease in the mass velocity of the displacement of soil particles.

Description

The utility model relates to the field of construction, namely to the construction of screens for protecting the foundations of buildings and structures from the effects of seismic vibrations, as well as for protection from vibration of the soil, the source of which can be any technological processes or equipment.

A device for protecting buildings and structures from vibration (patent RU No. 52415, publ. 03/27/2006), made in the form of a screen consisting of rows of wells filled with vibration-absorbing protective material and staggered relative to each other.

The disadvantage of this device is the low efficiency of reducing the intensity of vibrations due to the fact that with repeated wave exposure to light bulk material of the mixture, which is used as a protective material in an elastic shell, it compacts, coalesces and settles, its acoustic rigidity increases and the initial properties of the material change. In addition, part of the vibrational energy penetrates into the protected area through the soil space between the wells.

A known screen for protecting the foundations of buildings and structures from vibration (copyright certificate SU No. 815141, publ. March 23, 1981), which is located in the ground around the foundation and filled with vibration-absorbing material whose density exceeds the density of the soil, the outer and inner rows wells, and the wells of the outer row are staggered relative to the wells of the inner row, the wells of the outer row are made with a bias towards the foundation, the wells of the inner are with a reverse bias, soil between the rows of wells sealed.

The disadvantage of this device is the low efficiency of absorption of oscillations, since a significant part of the energy will penetrate into the contour mass of the soil through the soil jumpers, in the case of superposition of waves, an interference effect may occur, in which the amplitude of the resulting wave amplifies. The manufacture of such a screen is not technologically advanced, since in practice it is difficult to maintain strict parallelism and inclination of the wells.

A device for vibro-acoustic isolation of an object is known (copyright certificate SU No. 1675504, published September 7, 1991), including a screen made of protective material placed in the ground around the protected object, the screen being made of a compacted material containing elastic and viscous fine particles, whose wave resistance and surface the density is greater than the density of the surrounding soil.

The disadvantages include the fact that over time the walls of the trench will collapse during water saturation and, as a result, the material filling the trench will mix with the soil and compact, reducing the effectiveness of reducing the intensity of vibrations.

A device for protecting the object from seismic effects (copyright certificate SU No. 1776720, publ. 11/23/1992), which is a main screen in the soil, buried to bedrock, acoustic rigidity higher than that of the base soil, and also equipped with an additional screen from elastoplastic material of lower density. The depth of the additional screen is less than the main one, and is determined by condition.

The disadvantages of the device include the technological complexity of deepening the screen to the level of bedrock if the thickness of the base soil is substantial. In addition, the outstanding part of the energy from vibrations will penetrate into the protected array.

A known screen for protecting a building, structure from fluctuations in the foundation (copyright certificate SU No. 626154, publ. 09/30/1978), adopted as a prototype, which is a contouring building gap filled with hollow elastic elements (rubber), with the walls and the bottom the slots are provided with waterproofing, and the upper part of the slit is overlapped with protrusions and a collar so that the protrusions of the overlap are placed inside the collar.

The disadvantage of this device is the reduction in the elasticity of rubber as a result of the inability to deform reversibly when located at low temperatures. In addition, the damping effect of the waves is reduced, since the balls located in the gap are not tight enough to each other and are unevenly distributed over the volume.

The technical result is to reduce the wave action of vibrations due to the alternate use of acoustically rigid and soft shielding materials, while the main decrease in the mass velocity of soil particles occurs due to the work of springs enclosed between the layers of materials.

The technical result is achieved by the fact that, in addition to the layer of material with low acoustic rigidity, a layer of material with high acoustic rigidity is made of fiberglass panels, which are connected along the entire length by rubber gaskets and are rigidly connected by springs, the upper part of the screen is provided with an overlap with protrusions.

The screen device is illustrated by the following figures:

FIG. 1 is a general diagram of a device,

FIG. 2 is a top view

FIG. 3 - spring mounting,

FIG. 4 - mount rubber pads, where

1 - protected object,

2 - continuous gap,

3 - material with high acoustic rigidity (fiberglass panels),

4 - a layer of material with low acoustic rigidity (rubber),

5 - springs,

6 - metal clip

7 - screws

8 - the walls of the slit,

9 - bottom of the slit,

10 - waterproofing,

11 - layer of damping material,

12 - fiberglass panels,

13 - the upper part of the gap,

14 - overlap,

15 - overhangs,

16 - rubber gaskets,

17 - self-tapping screws.

The device (Fig. 1, 2) for protecting the object 1 is a screen contouring the building, made in the form of a continuous slit 2, filled with a layer of material 3 with high acoustic rigidity (for example, fiberglass panels) from the side of the oscillation source, and from the side of the protected object - a layer of material with low acoustic rigidity 4, for example, rubber, which is a shock absorber. Between the layers of materials are fixed springs 5. The final turns of the springs are dressed in metal clips 6, which are rigidly attached to the fiberglass panels and rubber panels using self-tapping screws 7 (Fig. 3). The walls 8 and the bottom 9 of the slit can be waterproofed 10, a layer of damping material 11 is additionally laid on the bottom, on top of which fiberglass panels 12 are laid to ensure uniform settlement. To prevent precipitation from entering the slot, the upper part 13 of the slot is provided with an overlap 14 with protrusions 15. Between the panels of material with high acoustic rigidity (fiberglass panels) rubber gaskets 16 are placed, which are attached to each fiberglass panel from the end using self-tapping screws 17 (Fig. 4) .

The device operates as follows. Waves propagating in the ground are first reflected from the material layer with high acoustic rigidity 3 and are refracted to the side of the protected structure 1. The horizontal longitudinal component of the wave penetrating into the gap is quenched by the air space 2 and is perceived by the springs 5, which also keep the gap walls from displacement . The horizontal transverse component of the waves of vibration is perceived by the rubber gaskets 16 located between the panels of the material with high acoustic rigidity 3, fiberglass panels. The final damping of the waves occurs due to the refraction of the waves into the layer of elastoplastic material 4, the rubber layer, which prevents the displacement of the soil mass towards the protected object 1. The layer of damping material located at the bottom of the slit 11 perceives vertical vibrations of the soil.

Claims (1)

A screen for protecting the foundations of buildings and structures from vibration, consisting of a material with low acoustic rigidity and made with the possibility of installation in the slit contouring the building, characterized in that in addition to the layer of material with low acoustic rigidity a layer of material with high acoustic rigidity is made of fiberglass panels , which are connected along the entire length by rubber gaskets and rigidly connected by springs, the upper part of the screen is provided with overlapping protrusions.

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