JPH07279443A - Vibration insulator mat for construction heavy equipment and demolishing method using the equipment - Google Patents

Abstract

PURPOSE:To prevent vibration generated by heavy equipment which is used during the execution of demolition work for an existing building in a city area from affecting vibratingly adjacent-areas. CONSTITUTION:A vibration insulator 1 comprising a synthetic resin-made hard expanded foam is rectangular-shaped about its plane shape while an iron layer plate 2 is laminated on the top of the insulator 1. At the same time, a clamping piece 3, which is substantially triangle-shaped and downward-directed, is installed to the peripheral edge of the iron layer plate 2, thereby clamping the vibration insulator 1 with the clamping piece 3. Therefore, if this vibration insulator 1 is used, it will be possible to decay a vibration level (VL), which is transmitted to the ground from an endless track of heavy equipment on the insulator by about 1/2. It is also possible to reduce a vibration effect range by the work of the heavy equipment close to a site boundary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents vibrations caused by the movement of heavy machinery (demolition work) used in construction work in urban areas, especially in the dismantling work of existing buildings, from affecting the neighborhood. Therefore, the present invention relates to an anti-vibration mat for operating heavy construction equipment that is laid in advance in an operating area of an endless track of heavy equipment, and a demolition method for an existing building that is implemented using the anti-vibration mat.

[0002]

2. Description of the Related Art Construction work in urban areas is often accompanied by demolition work of existing buildings. The demolition work is most concerned about the adverse effects of vibration and noise on the neighborhood during the period of this type of construction work. The main vibration source in the demolition work of the existing building is the vibration generated in the endless track part during the operation of dismantling or moving the large heavy equipment such as the backhoe with the attachment for dismantling,
It is known from the measurement results of the present inventors that the vibration of the heavy machinery propagates from the endless track through the ground of the site and affects the neighborhood.

Therefore, conventionally, anti-vibration materials such as old tires are laid on the ground of the site, a laid iron plate is placed thereon, and an endless track of a heavy machine is put on the laid iron plate to perform work prevention. Achieving the purpose of shaking is being carried out. Alternatively, a so-called "gara" formed by dismantling an existing building is laid on the ground of the site, leveled, and a heavy machine is mounted on top of the ground to perform the work, thereby achieving the purpose of anti-vibration.

[0004]

The conventional method of utilizing old tires or the like as a vibration isolator is such that the spring property of the vibration isolator is too soft like a cushioning material to cause unstable instability.
During the dismantling operation of heavy machinery, the vibration isolator swayed (deformed) in the horizontal direction, often impairing the dismantling workability. Not only that, the anti-vibration material was severely damaged during use, and could not be expected to be diversified.

On the other hand, the method of using a glass for the purpose of anti-vibration is as follows.
Unless the existing building is dismantled to a certain extent, it is not possible to obtain the glass, and until then, it is necessary to use the above-mentioned old tires as a vibration isolator or proceed with the demolition work at the expense of the vibration isolation effect. In addition, it was unavoidable that vibration was generated during the traveling of the transportation vehicle or during the lifting work in the process of laying the glass obtained through the demolition work of the existing building on the ground.

Therefore, the object of the present invention is to provide a high vibration damping effect (vibration damping performance), excellent suitability as a working floor for heavy equipment, excellent diversion, and economical, and easy to handle and store during use. It is an object of the present invention to provide an anti-vibration mat for construction heavy equipment operation, which is excellent in the use and has a wide range of applications, and a demolition method using the anti-vibration mat.

[0007]

As a means for solving the above-mentioned problems of the prior art, in a vibration isolating mat for operating heavy construction equipment according to the present invention, a vibration isolating material 1 made of synthetic resin hard foam is a flat surface. The vibration isolator 1 is formed in a rectangular shape, the iron plate 2 is laminated on the upper surface of the vibration isolator 1, and a holding piece 3 is provided at a peripheral portion of the iron plate so as to face downward at a substantially right angle. It is characterized in that the swing material 1 is held.

According to the present invention, a corrugated plate 4 having a spring property is interposed between a vibration isolator 1 made of the above-mentioned synthetic resin hard foam and a laid iron plate 2 laminated thereon, and It is also characterized in that the anti-slip connector 7 with the ground 6 is attached to the lower surface of the vibration isolator 1 made of hard foam of synthetic resin, or the anti-slip cotter 8 is formed on the lower surface.

Further, according to the present invention, a vibration isolator 1 made of synthetic resin hard foam is formed in a rectangular shape in a plan view, an iron plate 2 is laminated on an upper surface of the vibration isolator 1, and a peripheral edge portion of the iron plate is formed. Is provided with a holding piece 3 that faces downward at a substantially right angle, and the vibration-proof material M is held by the holding piece 3.
Are laid out in an aligned state on the ground of the work place, and adjacent vibration-isolating mats M, M are connected to each other by connecting tools 10 or 10 'inserted into connecting holes 9 provided in the peripheral portion of each laid iron plate 2. Then, the heavy equipment 12 is loaded on the vibration-proof mat M, and the vibration-proof material 1 made of hard foam foam of synthetic resin or the demolishing method for advancing the dismantling of the existing building 13 is formed into a rectangular planar shape. The iron sheet 2 is laminated on the upper surface of the vibration material 1, and a holding piece 3 is provided at a substantially right-angled downward direction on the peripheral edge of the iron sheet, and the vibration damping material 1 is held by the holding piece 3. The anti-vibration mat M excavates the ground of the workplace to a depth at least equivalent to the thickness of the mat, and lays it on the excavation bottom portion 16 and arranges it.
The heavy equipment 12 is loaded on the vibration-proof mat M with or without backfilling the earth and sand 17 on the upper surface of the mat,
It also features a dismantling method that promotes the dismantling of the existing building 13.

[0010]

The vibration propagating from the endless track of the heavy machine 12 on the vibration-proof mat M to the ground can be reduced to about 1/2 or less according to the experiment by the vibration-proof material 1 made of rigid foam. confirmed. The vibration-damping material 1 exhibits the above-mentioned vibration-proofing effect, and at the same time, because of its hard non-linear spring property, the stability of the heavy equipment mounted thereon is high, and the vibration of the heavy equipment during dismantling work cannot be supported by the work. Suppress to. Further, even when a horizontal force is applied to the heavy equipment during work, the frictional force between (the anti-vibration material 1 of) the vibration-proof mat M and the ground 6 or the non-slip connector 7
Of the anti-slip cotter 8 or the anti-slip cotter 8 does not cause the anti-vibration mat M to slide on the ground 6, and the horizontal force is exactly transmitted to the ground and does not hinder the dismantling work. The anti-slip connector 7 is properly used depending on whether the ground is hard, soft, or super soft, or whether or not soil concrete is applied.

Since the upper surface of the vibration isolator 1 made of hard foam is protected by the laid iron plate 2, even when a heavy machine runs on the antivibration cushion mat M or is disassembled on the mat. It is hardly damaged, its vibration damping effect does not diminish, and it can be diverted repeatedly. The elastic corrugated plate 4 interposed between the vibration isolator 1 made of hard foam and the iron plate 2 has the effect of the non-linear spring of the vibration isolator 1 and the corrugated plate 4.
Due to the difference from the linear spring effect of (1), a part of the frequency component of the exciting force is converted into high frequency vibration (n-fold vibration), so that the component of the fundamental frequency is attenuated.

The light-weight vibration isolator 1 made of rigid foam and the iron plate 2 can be handled, transported, stored and used as an integrated structure, but they can be separated and used for transportation and inventory control. It is also possible to use the structure in which the iron plate 2 is laminated on the upper surface of the vibration-damping material 1 only when necessary. Therefore, it can be used to exert the vibration damping effect of the mat even during the work of laying out or removing the vibration damping mat M and preventing the propagation of vibration.

Further, the vibration-proof mat M can be installed not only for the operation of the heavy equipment but also directly under the vibration source machine such as a generator or a compressor to achieve the purpose of the vibration-proof, and the lifting machine such as a wrecker. Can also be used underneath to increase stability.

[0014]

EXAMPLE An example of the present invention shown in the drawings will be described below.
The vibration-proof mat M whose plan view is shown in FIG. 1 is, for example, a rectangle having a vertical dimension of about 1800 mm × 900 mm. As shown in FIG. 2 for the detailed structure of the vibration-proof mat M, a vibration-proof material 1 made of a hard foam such as polypropylene is formed to a thickness of about 150 mm, and an iron plate 2 having a thickness of about 19 mm to 22 mm is formed on the upper surface thereof. Are stacked (stacked). The perimeter of the iron plate 2 is approximately 50 mm on a side.
A holding piece 3 is provided at a right angle downward by welding about angles, and the holding pieces 3 hold the four side surfaces of the vibration isolator 1 so that they are not laterally displaced and are not separated by a horizontal force. Is configured. The holding piece 3 is provided with an angle of equal length or an angle divided into an appropriate length discontinuously arranged along each piece of the vibration-proof mat 3. Therefore, it is possible to lift the iron plate 2 upward to separate it from the vibration isolator 1, but in some cases it is convenient to use both with an adhesive or with a connector material in a structure in which both are integrated. Each of the vibration-proof mats M has a weight of about 250 kg.

As shown in FIG. 3, a corrugated plate 4 having a spring property is interposed between the upper surface of the vibration isolator 1 and the lower surface of the iron plate 2 to further attenuate the fundamental frequency component. It can also be implemented in a configuration. The corrugated plate 4 is usually attached to the lower surface of the iron plate 2. The anti-vibration mat M having the above structure is shown in FIGS.
Is used as illustrated in. FIG. 4 shows the trailer 11
The heavy equipment 12 such as a backhoe with an attachment for dismantling that was transported to the construction site at
In self-propelled from the leaning position to the operating area of the same weight machine, the vibration isolating mat M is directly laid on the ground 6 of the traveling path of the same weight machine 12, and vibrations caused by the traveling of the same weight machine are generated. Does not have an adverse effect on the neighborhood.
FIG. 5 shows a situation in which the above-described vibration-proof mat M is directly laid on the ground 6 in the operating area of the heavy machine 12, and the heavy machine 12 on the mat starts the demolition work of the existing building 13. Reference numeral 14 in the figure is a temporary soundproof panel assembled on the outer periphery of the existing building 13. In Fig. 6, the demolition work of the building has progressed considerably, and the scraps 15 of the demolished material are piled up on the vibration-isolating cushion mat M with a considerable layer thickness, and the heavy equipment 12 is scraped by the scraps 15.
It shows the situation of getting on the top of the building and proceeding with the demolition work of the building. The heavy equipment 12 on the rattle 15 has fairly stable feet and does not slip or slip. Moreover, since the anti-vibration effect of the glass 15 is added, the adverse effect of vibration on the neighborhood is further reduced. Figure 7
The site ground 6 is excavated to a depth equivalent to the thickness of the anti-vibration mat M (about 150 mm), and a plurality of anti-vibration cushion mats M ... are laid side by side and buried in the excavation bottom 16 which is leveled substantially horizontally. A usage example in which the backfill soil 17 is covered on the mat M is shown. In some cases, it is possible to use the vibration-proof mats M only by laying them in the excavation bottom 16 and omitting the backfilling soil. In any case, according to the use example of FIG. 7, the vibration isolation mats M laid in the excavation bottom 16 are
The workability of heavy equipment is good because it is restrained by the edge of the periphery of the excavation section to prevent horizontal sliding and slippage. The vibration-isolating mats M are laid out in a regular arrangement with the heavy-machine operating direction (moving direction) being the longitudinal direction of the vibration-proof mat. Other uses and examples of the use of the above-mentioned vibration-proof mat M include work of heavy equipment used for forming a traveling path for vehicles for carrying in and out of industrial wastes that enter and exit construction sites, or for underground demolition work. It can be widely used for forming a floor and so on.

By the way, when the anti-vibration mats M are directly laid and arranged on the ground of the site ground 6 as shown in FIG. 4 or 5, the space between the adjacent anti-vibration mats M is firstly determined. It is important to connect and restrain each other so as not to expand unnecessarily, and secondly, it is necessary to fix the mat itself so that the mat itself does not unnecessarily slide or slide on the ground by the action of horizontal force.

Therefore, first, the means for connecting the vibration-proof mats M to each other is shown in FIGS. FIG. 8A shows an example in which the fastening pin portion 10a of the connecting tool 10 is inserted and connected to the connecting hole 9 provided in advance in the peripheral portion of the laid iron plate 2 of each of the adjacent vibration isolation mats. As shown in FIG. 8B, the details of the structure of the connector 10 are the long holes 1 formed at the end on the center side.
0f is equipped with a tapered conical screw or multi-step harpoon-like retaining portion at the outer ends of the two members 10c, 10c flexibly connected by a shaft 10b, and has a length of about 50 mm. The fastening pin portion 10a is attached by a shaft 10d, the shaft 10d and a member on the opposite side are connected by a pulling spring 10e, and the elongated hole 10f is connected by the shaft 10b.
It is configured to expand and contract within the range of the length. Therefore, when the two fastening pin portions 10a on both sides are driven through the connecting holes 9 provided in the laid iron plate 2 of the adjacent mat, the fastening pin portions 10a bite into the vibration isolator 1 to prevent Due to the non-return action, the driven state is maintained and the mats are connected to each other.

Next, FIG. 9A shows an example in which the vibration isolating mats M, M adjacent to each other are connected by the connector 10 having the rake structure shown in FIG. 9B. The connector 10 shown in FIG. 9B is divided into a plurality of finger-shaped tips at the outer ends of the two members 10h and 10h whose central portions are flexibly connected by the hinge 10g, and also through the hinge 10g. The rake-shaped fastening pin portion 10i is rotatably connected. Therefore, when the fastening pin portions 10i, 10i on both sides of the connecting tool 10 are driven into the laying iron plate 2 through the connecting holes 9 provided in the slit shape in advance, they bite into the cushioning material 1 and as shown in FIG. The purpose of linking is achieved.

Next, FIG. 10 and the following figures show means for fixing the mat by preventing the above-mentioned vibration-proof mat M from slipping on the ground. First, FIG. 10A shows a usage state of the non-slip connector 7 used for the ground of the relatively hard ground 6. The non-slip connector 7 is made of hard synthetic resin or metal and has a flat ground plate 7 as shown in FIG. 10B.
It is configured such that a fastening pin portion 7b having a tapered conical shape and provided with a retaining collar such as a multi-step harpoon is projected upward in a substantially central portion of the upper surface of a. The anti-slip connector 7 can be used by driving the anti-vibration mats M into place in the anti-vibration material 1 by placing the anti-skid pins 7b in appropriate places on the lower surface of the anti-vibration material 1 before laying them out. The fastening pin portions 7b are laid out on the ground on which the Ms are lined up in an appropriate posture in a manner that the fastening pin portions 7b are standing upward, and the vibration-proof mat M is laid on it. As a result, the fastening pin portions 7b of each connector are cushioned. It can also be used in such a way as to bite the lower surface of the material 1. FIG. 11 shows an example of the non-slip connector 7 used on the ground on which earthen concrete (disused concrete) has been cast. This is characterized by a structure in which an anti-slip cotter 7c is formed on the lower surface of the ground plate 7a, and the method of using the same is the same as in the above-mentioned embodiment. FIG. 12A shows an example of the non-slip connector 7 used on soft ground. The connector 7 has a harpoon-shaped fastening pin portion 7b on the upper surface of the ground plate 7a, and a rod-shaped penetrating pin 7d protruding downward by about 50 mm at the substantially central portion of the lower surface. It is characterized in that 7d is driven into the ground 6 and fixed. Therefore, the method of using this connector 7 is the same as that of the above-mentioned respective embodiments, except that the penetration pin 7d is driven into the ground 6. FIG. 13 shows a non-slip connector 7 used for ultra-soft ground. Most of the configuration is common to that for the soft ground of FIG. 12B, but the feature is that the penetration pin 7d is about 2 to 3 times longer. The anti-slip connector 7 shown in FIG. 14 has an anchor 7f on the lower surface of the vibration-proof material 1 of the vibration-proof mat M.
It is used by attaching it in advance, and is applied to soft ground with uneven ground. On the lower surface side of the connector 7, the penetration leg 7 which pierces the ground and has a large pulling resistance
e. FIG. 15 shows an embodiment in which a rugged cotter 8 is directly processed on the lower surface of the vibration-proof material 1 of the vibration-proof mat M which is laid directly on the ground on which hard ground or soil concrete is cast. However, the formation of the cotter is not directly processed into a vibration proof material, but a keyson plate or a thin iron plate with a cotter is laid on the ground, and a vibration proof mat is placed on it to obtain the same effect. The method of obtaining is also carried out.

[0020]

[Effects of the Present Invention] The present invention has the following effects. (1) By using the anti-vibration mat of the present invention, the vibration level (VL) propagating from the endless track of the heavy equipment for building demolition on it to the ground can be attenuated to about 1/2, and the site boundary It is possible to reduce the range of vibration effects of heavy machinery work that is close to. (2) The dismantling method using the anti-vibration mat of the present invention makes it possible to reduce the lateral displacement of the endless track of a heavy machine operating on the anti-vibration mat in the horizontal direction and the slippage on the anti-vibration mat. Since the shaking of the heavy equipment itself is suppressed to the extent that it does not hinder the work, the dismantling workability of the heavy equipment can be improved and the safety is high. (3) The anti-vibration mat of the present invention can be transported, assembled, laid,
Since it also reduces the occurrence of vibration in the process of removal, it contributes to the reduction of vibration in all processes of dismantling work. (4) The anti-vibration mat is hardly damaged even if it is repeatedly diverted to dismantling work, which is economical. (5) In addition to the heavy equipment for dismantling, the anti-vibration mat exhibits the anti-vibration effect by inserting it just below the vibration source such as the generator or compressor.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a vibration-proof mat.

FIG. 2 is a sectional view taken along the line 2-2 of FIG.

FIG. 3 is a cross-sectional view showing a main part of another embodiment of the vibration-proof mat.

FIG. 4 is an elevational view showing an example of use of a vibration-proof mat.

FIG. 5 is an elevational view showing another usage example of the vibration-proof mat.

FIG. 6 is an elevational view showing another example of use of the vibration-proof mat.

FIG. 7 is an elevation view showing another example of use of the vibration-proof mat.

FIG. 8A is a cross-sectional view showing a main part of a connected state of the vibration-proof mat, and B is a front view of the connecting tool.

9A is a cross-sectional view showing a main part of a connected state of a vibration isolation mat, and FIG. 9B is a perspective view of a connecting tool.

FIG. 10 is a sectional view showing a main part of a non-slip connector in use, and B is a perspective view of the non-slip connector.

FIG. 11 is a perspective view showing a non-slip connector having a different configuration.

FIG. 12A is a cross-sectional view showing a main portion of a non-slip connector in use, and B is a perspective view of the non-slip connector.

FIG. 13 is a perspective view showing a non-slip connector having a different configuration.

FIG. 14 is a sectional view showing a main part of a non-slip connector having a different configuration.

FIG. 15 is a cross-sectional view showing a main part of a different structure of the vibration damping mat.

[Explanation of symbols]

 1 Anti-vibration material 2 Laminated iron plate 3 Bent part 4 Corrugated plate 6 Ground 7 Anti-slip connector M Anti-vibration mat 8 Anti-slip cotter 9 Connection hole 10 Coupling tool 12 Heavy equipment 16 Excavation bottom 17 Backfill soil

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Tsurumaki, 5-5 Otsuka, Inzai-cho, Inba-gun, Chiba, Ltd. Takenaka Corporation Technical Research Institute (72) Inventor, Tamio Imazawa 1-5, Otsuka, Inzai-cho, Inba-gun, Chiba Prefecture Bannaka Takenaka Corporation Technical Research Institute

Claims (5)

[Claims] 1. A vibration-damping material made of hard foam of synthetic resin is formed in a rectangular shape in a plan view, an iron plate is laminated on an upper surface of the vibration-damping material, and a peripheral edge portion of the iron-iron plate is directed downward at a substantially right angle. An anti-vibration mat for operating a heavy construction machine, comprising a holding piece, and the holding piece holds the vibration-proof material. 2. A corrugated plate having a spring property is interposed between a vibration isolator made of the synthetic resin hard foam according to claim 1 and an iron plate laminated on the vibration isolator. Anti-vibration mat for operating heavy construction machinery. 3. A non-slip connector to the ground is attached to the lower surface of the vibration isolator made of the hard foam of synthetic resin according to claim 1, or an anti-slip cotter is formed on the lower surface. A characteristic vibration-proof mat for operating heavy construction machinery. 4. A vibration-damping material made of synthetic resin hard foam is formed in a rectangular shape in plan view, and an iron plate is laminated on an upper surface of the vibration-damping material, and a peripheral edge portion of the iron plate is oriented downward at a substantially right angle. An anti-vibration mat provided with a holding piece and holding the anti-vibration material by the holding piece is laid out in an aligned state on the ground of the work place, and adjacent anti-vibration mats are arranged around each iron plate. It is connected to each other with a connecting tool inserted in the connecting hole provided in the section, and the heavy equipment is loaded on this anti-vibration mat to promote the dismantling of the existing building. Demolition method using shaking mat. 5. A vibration-damping material made of synthetic resin hard foam is formed in a rectangular shape in plan view, and an iron plate is laminated on an upper surface of the vibration-damping material, and a peripheral edge portion of the iron plate is oriented at a substantially right angle downward. An anti-vibration mat provided with a holding piece and holding the anti-vibration material by the holding piece is laid on the bottom of the excavation ground by excaving the ground of the workplace to a depth at least equivalent to the thickness of the mat. , Backfill the top of the anti-vibration mat with earth and sand,
Or, without backfilling, the heavy equipment is loaded on the anti-vibration mat and the dismantling of the existing building is promoted.
Demolition method using anti-vibration mats for operating heavy construction equipment.