JP2012007315A - Pile/wall placing device, intermediate vibration hammer, and placing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a placing device for a large-sized pile or wall that enables coordinated operation of three or more vibration hammers.SOLUTION: An intermediate multi-shaft vibration hammer which is disposed at a position other than both ends for coordinating at least three multi-shaft vibration hammers comprises one or more stages in a vertical direction. One of the stages is provided with a drive shaft 14, an end of which receives transmission of rotation force from rotary drive means, and a follower shaft 15. The other stages are provided with a plurality of follower shafts respectively. Each of the driving shaft and the follower shafts is fitted with a pair of a fixed eccentric weight 11 and a movable eccentric weight 12. The rotation force transmitted to an end of the driving shaft is transmitted to all the fixed and movable eccentric weights via a plurality of gears 13. An amplitude varying device 17, which changes or maintains the phase difference of the movable eccentric weights relative to the fixed eccentric weights, is attached to the driving shaft at the other end of the drive shaft disposed on the stage for the drive shaft.

Description

  The present invention relates to a driving device for driving a large pile or wall, and more particularly to a driving device that links a plurality of vibratory hammers and a driving method using the driving device.

  Conventionally, when a large-diameter pile or a long wall body such as a steel plate cell is placed, if a single vibro hammer is used, a huge drive source and a large mass are required, which hinders production and conveyance. . Therefore, a plurality of (a large number) vibratory hammers are attached to the piles or the wall body, and one driving device is configured by performing a synchronous operation in cooperation with them. For example, it describes in patent documents 1-3.

  FIG. 8A is a plan view schematically showing a conventional driving apparatus 100 attached to the steel plate cell 200, and FIG. 8B is a schematic front view (the inside of a dotted line box is omitted). The placing device 100 includes an annular base member 8 having a shape along the upper edge of the steel plate cell 200, a gripping device 9 that is attached to the lower surface of the base member 8 and holds the upper edge of the steel plate cell 200, There are twelve vibratory hammers 20 arranged and fixed in an annular shape on the upper surface of the base member 8. The adjacent vibro hammers are linked to each other by a universal joint 5. Each vibrator hammer 20 is tuned by appropriate driving means (not shown) via a pulley 16 mounted on the drive shaft. Here, the “tuned operation” means that the vibration phases of a plurality of vibratory hammers linked to each other match.

  In addition to the universal joint, a tire coupling is also used as a means for linking adjacent vibrator hammers. When two units are linked, tire coupling is advantageous.

  Here, for example, when placing a monopile with a pile diameter exceeding 4 m or a steel plate cell with a cell diameter exceeding 18 m, the forced vibration frequency of the vibrator hammer and the natural vibration of the surrounding ground or structure or the base member are often used. There is a problem that the number causes a resonance phenomenon and causes vibration pollution due to ground vibration or a destruction phenomenon of the base member (crack of the member). In the prior arts disclosed in Patent Documents 1 to 3, since the eccentric moment of each vibrator hammer cannot be automatically controlled, a base member having a high rigidity and a large mass is required to prevent resonance, which is uneconomical.

  Therefore, in order to automatically control the eccentric moment in the vibratory hammer, first, in a single vibratory hammer, a fixed eccentric weight and a movable eccentric weight (hereinafter collectively referred to as “fixed / A pair of eccentric weights, and the total eccentric moment is changed by changing the rotational phase difference between the pair of eccentric weights, and the amplitude of a single vibrator hammer. Has been proposed to be adjustable from zero to the maximum (Patent Documents 4 to 6).

  FIG. 9A is a perspective view showing a main part of a known biaxial vibro hammer 2 having a fixed / movable eccentric weight. The biaxial vibrator hammer 2 includes two shafts, a drive shaft 14 and a driven shaft 15 (only a geometrical shaft is shown for convenience). A pulley 16 is attached to the drive shaft 14, and rotational force is transmitted by rotational drive means (not shown) to be driven to rotate. Each of the drive shaft 14 and the driven shaft 15 is provided with a fixed eccentric weight 11 fixed so as to rotate together with the shaft and a movable eccentric weight 12 not fixed to the shaft. The biaxial vibro hammer 2 has two pairs of fixed and movable eccentric weights 12.

  Further, an amplitude variable device 17 for changing and maintaining the phase difference of the movable eccentric weight 12 with respect to the fixed eccentric weight 11 is provided on the driven shaft 15. The amplitude variable device 17 is automatically controlled (for example, hydraulically controlled). The biaxial vibrator 2 is provided with four gears 13 for transmitting the rotational force of the drive shaft 14 to all the fixed / movable eccentric weights 11 and 12 for synchronous rotation. The gear 13 also plays a role of transmitting the phase difference change by the amplitude variable unit 17 to all the movable eccentric weights 12.

  In the basic operation mode of the biaxial vibratory hammer 2 shown in FIG. 9A, the fixed eccentric weight 11 and the movable eccentric weight 12 rotate in synchronization with each other while maintaining a constant phase difference. Therefore, the eccentric moment about one axis is the sum of the eccentric moments of the fixed eccentric weight 11 and the movable eccentric weight 12, and the total eccentric moment of the biaxial vibrator hammer 2 is the sum of the two eccentric axes. It is the sum of the eccentric moments. By adjusting the rotational phase difference between the fixed eccentric weight 11 and the movable eccentric weight 12, the total eccentric moment, that is, the amplitude of the biaxial vibrator hammer 2, can be increased or decreased from zero to the maximum.

  FIG. 9B is a schematic diagram illustrating a control mode for increasing / decreasing the total eccentric moment in the biaxial vibrator hammer 2. (A) is in a phase difference (180 °) where the fixed eccentric weight 11 and the movable eccentric weight 12 on each axis of the biaxial vibratory hammer face each other. Even if it rotates with this phase difference, the total eccentric moment is zero, that is, the amplitude is zero. The vibro hammer is activated in a state where the total eccentric moment is zero, and is increased to a predetermined frequency higher than the frequency causing resonance. (B) shows a state in which, after reaching a predetermined frequency, the phase difference of the movable eccentric weight 12 is changed to maximize the total eccentric moment. Thereby, a predetermined amplitude is generated and placement is performed. After the placement is completed, the amplitude is adjusted to zero again, and then the vibration frequency is reduced by the braking mechanism and stopped.

  FIG. 10A is a perspective view showing a main part of a known four-axis vibratory hammer 4 having a fixed / movable eccentric weight. One drive shaft 14 and one driven shaft 15 are provided in the upper stage, two driven shafts 15 are provided in the lower stage, and an amplitude variable device 17 is provided on the upper driven shaft 15 and one lower driven shaft 15. The four-axis vibratory hammer 4 has four pairs of fixed / movable eccentric weights and eight gears 13.

  FIG. 10B is a schematic diagram showing a control mode similar to that of FIG. 6B described above for the four-axis vibrator hammer 4. (A) is a state where the total eccentric moment is zero, and (b) is a state where the total eccentric moment is maximum.

  Patent Documents 5 and 6 describe a vibratory hammer equipped with an automatically controllable amplitude variable device that continuously changes the phase difference between the fixed and movable eccentric weights without stopping the operation. In Patent Document 4, a biaxial vibratory hammer is described, and in Patent Document 5, a four-axis vibratory hammer is described.

Japanese Patent Publication No.58-36126 JP 59-41523 Japanese Patent Publication No. 61-22692 Japanese Patent No. 3731169 JP-A-9-3891 JP 2002-66458 A

  The above-described conventional two-axis vibratory hammer or four-axis vibratory hammer capable of automatically controlling the total eccentric moment has the following problems when a plurality of, particularly three or more, are linked.

FIG. 11 is a schematic plan view showing a form in which two biaxial vibro hammers 2 shown in FIG. 9A are linked.
FIG. 12 is a schematic plan view showing a form in which two four-axis vibrator hammers 4 shown in FIG. 10A are linked (for convenience, the upper and lower stages are shown separately).

  As shown in FIG. 11, the biaxial vibro hammer 2 is provided with a pulley 16 and an amplitude variable device 17 on the same side with respect to the drive shaft 14 and the driven shaft 15. Therefore, when two units are linked, if one is placed on the right (the drive shaft is on the right side in plan view), the other is placed on the left (the drive shaft is on the left side in plan view) ), One drive shaft 14 and the other driven shaft 15 are linked by appropriate linkage means 5. Note that the right arrangement and the left arrangement are in a positional relationship in which the biaxial vibro hammer 2 having the same configuration is rotated 180 degrees relative to each other in the horizontal plane. It is to be noted that linking the drive shaft 14 and the driven shaft 15 in this way is effective in minimizing the effects of advance and delay of rotation transmission and angle error when the linking means 5 is a universal joint.

  Similarly, as shown in FIG. 12, the four-axis vibrator hammer 4 is provided with a pulley 16 and an amplitude variable device 17 on the same side with respect to the upper drive shaft 14 and the driven shaft 15. Therefore, when two units are linked, if one is arranged on the right side, the other is arranged on the left side, and one upper drive shaft 14 and the other upper driven shaft 15 are linked by appropriate linkage means 5. Also in this case, the right arrangement and the left arrangement are in a positional relationship that is 180 ° rotationally symmetric with each other in the horizontal plane. For the lower stage, any one of the two driven shafts 15 is linked by the linkage means 5.

  Thus, both the two-axis vibratory hammer 2 and the four-axis vibratory hammer 4 can be linked to each other. However, when another two-axis vibro hammer 2 or four-axis vibro hammer 4 is to be connected to the right or left side of these two vibrator hammers, the pulley 16 or the amplitude variabler 17 is attached to the linkage shaft. I can't let you. Therefore, three or more conventional biaxial vibrator hammers 2 or four-axis vibrator hammers 4 capable of automatically controlling the amplitude cannot be linked in series as in the annular form shown in FIG. 8, for example.

  In view of the above situation, the present invention provides a pile or wall body in which a total eccentric moment, that is, an amplitude-controllable biaxial or four-axis vibro hammer, and an arbitrary number of three or more multi-axis vibro hammers are linked. It is an object of the present invention to provide an apparatus and a placing method, and an intermediate vibrator hammer capable of these. Moreover, it aims at solving the problem of the resonance phenomenon in placement of large piles etc. by this.

  In order to achieve the above object, the present invention provides an end vibro hammer disposed at both ends in order to link three or more biaxial or four-axis vibro hammers and a multi-axis vibro hammer. It is characterized in that at least one intermediate vibrator hammer arranged between them is configured differently.

  Specifically, the present invention has the following configuration. Numbers in parentheses are reference numerals in the drawings described later, and are attached for reference.

A pile or wall placing device according to the present invention includes a base member (8) and a gripping device (9) attached to the lower surface of the base member (8) to grip the pile or wall body. And a pile or wall comprising: three or more biaxial vibro hammers arranged and fixed on the upper surface of the base member (8); and rotational drive means for rotationally driving the three or more biaxial vibro hammers for synchronous operation In the body placing device,
(A) The three or more biaxial vibro hammers are disposed between one end biaxial vibro hammer (2) and one end biaxial vibro hammer (2). Including at least one intermediate biaxial vibro hammer (2M),
(B) Both the end biaxial vibro hammer (2) and the intermediate biaxial vibro hammer (2M) have a drive shaft (14) and a driven shaft (15) that transmit the rotational force of the rotational drive means to one end. Is provided,
(C) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and the driven shaft (15), and the drive shaft (14). Rotational force transmitted to one end of each of the fixed eccentric weight (11) and the movable eccentric weight (12) is transmitted to a plurality of gears (13),
(D) In the end biaxial vibro hammer (2), an amplitude variabler (17) for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11), While attached to one end of the driven shaft (15),
(E) In the intermediate biaxial vibro hammer (2M), the amplitude variabler (17) for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) includes: It is attached to the other end of the drive shaft (15)
(F) In the linkage of the end biaxial vibratory hammer (2) and the intermediate biaxial vibratory hammer (2M), the other end of the drive shaft (14) or the driven shaft (15) in the end biaxial vibratory hammer (2) And one end or the other end of the driven shaft (15) in the intermediate biaxial vibratory hammer (2M) are linked by a linkage means (5), and
(G) In the linkage between the adjacent two intermediate biaxial hammers (2M), the driven shafts (15) are linked by the linkage means (5).

The second form of the pile or wall placing device according to the present invention comprises a base member (8) and a gripping device (9) attached to the lower surface of the base member (8) to grip the pile or wall. And a pile including three or more four-axis vibrator hammers arranged and fixed on the upper surface of the base member (8), and a rotation driving means for rotationally driving each of the three or more four-axis vibrator hammers for synchronous operation. Or in the wall placing device,
(A) The three or more four-axis vibratory hammers are arranged between one end four-axis vibratory hammer (4) and one end four-axis vibratory hammer (4). Including at least one intermediate four-axis vibro hammer (4M),
(B) Both the end four-axis vibratory hammer (4) and the intermediate four-axis vibratory hammer (4M) have a first stage and a second stage in the vertical direction, and the first stage includes: A drive shaft (14) and a driven shaft (15) that transmit the rotational force of the rotational drive means to one end are provided, and two driven shafts (15) are provided in the second stage,
(C) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and the three driven shafts (15), and the drive shaft ( The rotational force transmitted to one end of 14) is transmitted to all the fixed eccentric weight (11) and the movable eccentric weight (12) by a plurality of gears (13),
(D) In the first stage of the end four-axis vibratory hammer (4), an amplitude variable device for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) (17) is attached to one end of the driven shaft (15),
(E) In the first stage of the intermediate four-axis vibratory hammer (4M), an amplitude variabler for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) ( 17) is attached to the other end of the drive shaft (14),
(F) In the first stage linkage of the end four-axis vibratory hammer (4) and the intermediate four-axis vibratory hammer (4M), the drive shaft (14) or the driven shaft in the end four-axis vibratory hammer (4) The other end of (15) and one end or the other end of the driven shaft (15) in the intermediate four-axis vibro hammer (4M) are linked by the linkage means (5), and
(G) In the linkage of the first stages of the adjacent intermediate four-axis vibro hammers (4M), the driven shafts (15) are linked by the linkage means (5).

A third embodiment of a pile or wall placing device according to the present invention includes a base member (8) and a gripping device (9) attached to the lower surface of the base member (8) to grip the pile or wall. And a pile including three or more multi-axis vibro hammers arranged and fixed on the upper surface of the base member (8), and a rotation driving means for rotationally driving each of the three or more multi-axis vibro hammers for synchronous operation. Or in the wall placing device,
(A) The three or more multi-axis vibro hammers are arranged between one end multi-axis vibro hammer (R, L) and one end multi-axis vibro hammer (R, L). And at least one intermediate multi-axis vibro hammer (M) disposed in the
(B) Both the end multi-axis vibro hammer (R, L) and the intermediate multi-axis vibro hammer (M) have one or more stages in the vertical direction, and one of the one or more stages. Is provided with one drive shaft (14) and one driven shaft (15) for transmitting the rotational force of the rotational drive means to one end, and when there are other stages, a plurality of stages are provided in each stage. A driven shaft (15) is provided,
(C) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and all the driven shafts (15), and the drive shaft ( The rotational force transmitted to one end of 14) is transmitted to all the fixed eccentric weight (11) and the movable eccentric weight (12) by a plurality of gears (13),
(D) In the stage provided with the drive shaft (14) of the end multi-axis vibratory hammer (R, L), the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) is calculated. While an amplitude variable device (17) for changing or holding is attached to one end of the driven shaft (15),
(E) In the stage provided with the drive shaft (14) of the intermediate multi-axis vibratory hammer (M), the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) is changed or held. An amplitude variable device (17) is attached to the other end of the drive shaft (14),
(F) In the linkage of the stage provided with the drive shaft (14) of the end multi-axis vibro hammer (R, L) and the intermediate multi-axis vibro hammer (M), the end multi-axis vibro hammer (R, L) The other end of the drive shaft (14) or driven shaft (15) in L) and one end or the other end of the driven shaft (15) in the intermediate multi-axis vibro hammer (M) are linked by linkage means (5), and ,
(G) In the linkage of the stages provided with the drive shaft (14) of the adjacent intermediate multi-axis vibro hammer (M), the driven shafts (15) are linked by the linkage means (5). Features.

  In the fourth embodiment of the pile or wall placing apparatus according to the present invention, in any one of the first to third embodiments, three or more vibratory hammers are arranged and fixed in an annular manner, and adjacent vibratory hammers are linked to each other. In this case, the vibro hammer located at the start end and the vibro hammer located at the end are not linked to each other.

The form of the intermediate biaxial vibratory hammer according to the present invention is an intermediate biaxial vibratory hammer arranged at a position other than both ends in order to link three or more biaxial vibratory hammers.
(A) provided with a drive shaft (14) and a driven shaft (15) for transmitting the rotational force of the rotational drive means to one end;
(B) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and the driven shaft (15), and the drive shaft (14). Rotational force transmitted to one end of each of the fixed eccentric weight (11) and the movable eccentric weight (12) is transmitted to a plurality of gears (13),
(C) An amplitude variable device (17) for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) is attached to the other end of the drive shaft (15). It is characterized by.

The form of the intermediate four-axis vibratory hammer according to the present invention is an intermediate four-axis vibratory hammer arranged at a position other than both ends in order to link three or more four-axis vibratory hammers,
(A) It has a 1st stage and a 2nd stage in the up-and-down direction, and a drive shaft (14) and a driven shaft (15 ), And the second stage is provided with two driven shafts (15),
(B) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and the three driven shafts (15), and the drive shaft ( The rotational force transmitted to one end of 14) is transmitted to all the fixed eccentric weight (11) and the movable eccentric weight (12) by a plurality of gears (13),
(C) In the first stage, an amplitude variable unit (17) for changing or holding a phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) includes the drive shaft ( It is mounted on the other end of 14).

The form of the intermediate multi-axis vibratory hammer according to the present invention is an intermediate multi-axis vibratory hammer arranged at a position other than both ends in order to link three or more multi-axis vibratory hammers,
(A) One or more stages are provided in the vertical direction, and one of the one or more stages is provided with one drive shaft (14) and 1 for transmitting the rotational force of the rotational drive means to one end. One driven shaft (15) is provided, and when there are other stages, a plurality of driven shafts (15) are provided in each stage,
(B) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and all the driven shafts (15), and the drive shaft ( The rotational force transmitted to one end of 14) is transmitted to all the fixed eccentric weight (11) and the movable eccentric weight (12) by a plurality of gears (13),
(C) In the stage provided with the drive shaft (14), the amplitude variabler (17) for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) Is mounted on the other end of the drive shaft (14).

The form of the pile or wall body placing method according to the present invention is a pile or wall body placing method using any of the above placement apparatuses,
After setting the phase difference between each pair of fixed eccentric weight (11) and movable eccentric weight (12) by the amplitude variable device (17) so that the amplitude of each vibrator hammer becomes zero, the rotation drive means Starting rotation driving of each vibrator hammer;
Increasing the frequency of each vibratory hammer while maintaining the amplitude of each vibratory hammer at zero until it passes through a region of frequency that causes resonance with the base member of the driving device or the surrounding ground; and
After reaching a predetermined frequency higher than the resonance frequency range, the amplitude variable device (17) causes the phase difference between the fixed eccentric weight (11) and the movable eccentric weight (12) of each pair. To change the amplitude of each vibro hammer to an appropriate amplitude for placing, and placing a pile or wall body,
After completing the placement, the amplitude variable (17) is used to set the phase difference between the fixed eccentric weight (11) and the movable eccentric weight (12) of each pair so that the amplitude of each vibrator hammer becomes zero again. A step of reducing and stopping the vibration frequency of each vibrator hammer after the change.

  In the present invention, when three or more vibratory hammers capable of automatically controlling the total eccentric moment, that is, the amplitude from zero to the maximum, are linked in series, the end vibratory hammers arranged at both ends, and the intermediate hammers arranged between them. By making the configuration of the vibrator hammer different, it is possible to link the vibrator hammers without limitation on the number of vibrator hammers.

  In the end vibro hammer, one end of the drive shaft is attached with, for example, a pulley to which the rotational force from the rotational drive means is transmitted, and the amplitude is applied to the same end of the driven shaft arranged parallel to the drive shaft in a horizontal plane. A variable device is attached. The structure of the end vibro hammer is the same as that of the known biaxial or tetraaxial vibro hammer shown in FIG. 11 or 12 described above.

  On the other hand, in the intermediate vibrator hammer, for example, a pulley for transmitting the rotational force from the rotational driving means is provided at one end of the drive shaft, and an amplitude variable device is attached to the other end of the drive shaft. Neither a pulley nor an amplitude variable device is attached to both ends of the driven shaft arranged in parallel to the drive shaft in a horizontal plane. That is, the amplitude variable device that has conventionally been provided at one end of the driven shaft is moved to the other end of the drive shaft. As a result, the linking means can be attached to either one end or the other end of the driven shaft, and any number of links can be linked.

  The intermediate vibratory hammer according to the present invention is preferably applied to a biaxial vibratory hammer and a four-axis vibratory hammer (a vibratory hammer having a structure in which two stages are stacked in the vertical direction and each stage has two axes). Furthermore, the present invention is applicable to a general multi-axis vibro hammer (a vibro hammer having a single stage or a plurality of stages stacked in the vertical direction and having a plurality of axes in each stage).

  In an intermediate multi-axis vibratory hammer having one or a plurality of stages and a plurality of axes provided in each stage, one drive shaft is provided in one of the stages. A rotational force is transmitted to one end of the drive shaft, and an amplitude variable device is attached to the other end of the drive shaft. Then, one end or the other end of the driven shaft at the same stage as the drive shaft is used to link with the adjacent vibrator hammer.

  The driving device according to the present invention is formed by connecting end vibro hammers at both ends and connecting an intermediate vibro hammer between them in series. Since any number of intermediate vibro hammers can be linked, a placement device suitable for a large pile or the like can be configured.

  In the method of driving a pile or wall according to the present invention using the above-described driving device, rotation driving is started with the amplitude of the vibrator hammer set to zero by the amplitude variable device, exceeding the natural frequency region of the base member and the surrounding ground. After that, the amplitude variable device is adjusted to generate the amplitude necessary for placement. As a result, it was possible to install large piles and the like without causing damage to the installation device due to the resonance phenomenon and vibration pollution to surrounding structures.

It is a top view which shows roughly one Example of the intermediate | middle biaxial vibratory hammer in the placement device of the pile or wall by this invention. It is a top view which shows the Example which linked 3 units | sets of 2 axis | shaft vibro hammers. It is a top view which shows the Example which linked 3 or more arbitrary number of biaxial vibro hammers. It is a top view which shows roughly one Example of the intermediate | middle four-axis vibro hammer in the placing device of the pile or wall by this invention. It is a top view which shows the Example which linked 3 units | sets of 4 axis | shaft vibro hammers. It is a top view which shows roughly one Example which linked 3 or more arbitrary number of multi-axis vibro hammers. It is a top view which shows roughly another Example which linked 3 or more arbitrary numbers of multi-axis vibro hammers. (A) is the top view which showed typically the placement apparatus of this invention attached to the steel plate cell, (b) is a schematic front view (The inside of a dotted line enclosure is abbreviate | omitted). (A) is the top view which showed typically the conventional placing apparatus attached to the steel plate cell, (b) is a schematic front view (The inside of a dotted line enclosure is abbreviate | omitted). It is a perspective view which shows the principal part of the well-known biaxial vibratory hammer provided with the fixed and movable eccentric weight. It is a schematic diagram explaining the control form which increases / decreases the total eccentric moment in a biaxial vibratory hammer. It is a perspective view which shows the principal part of the well-known four-axis vibratory hammer provided with the fixed and movable eccentric weight. It is a schematic diagram explaining the control form which increases / decreases the total eccentric moment in a four-axis vibratory hammer. It is a top view which shows the form which united two biaxial vibro hammers shown to FIG. 9A. FIG. 10B is a plan view showing a form in which two four-axis vibro hammers shown in FIG. 10A are linked (for convenience, the upper stage and the lower stage are shown separately).

Embodiments of the present invention will be described below with reference to the drawings illustrating examples.
FIG. 1 is a plan view schematically showing an embodiment of an intermediate biaxial vibratory hammer 2M in a pile or wall placing apparatus according to the present invention.
The intermediate biaxial vibratory hammer 2M is arranged between two end biaxial vibratory hammers arranged one by one at both ends when three or more biaxial vibratory hammers are linked in series. Incidentally, the end biaxial vibratory hammer has the same configuration as the biaxial vibratory hammer 2 shown in FIGS. 9A and 11.

  In the intermediate biaxial vibrator hammer 2M, a drive shaft 14 and a driven shaft 15 that are parallel to each other in the horizontal direction in the case 19 are erected, and these shafts are supported by bearings attached to the case 19, respectively. .

  A pair of fixed eccentric weights 11 and a movable eccentric weight 12 are attached to the front drive shaft 14 (for the sake of convenience, the lower side in the figure is the front and the upper side in the figure is the rear). The fixed eccentric weight 11 is fixed to the drive shaft 14 so as to rotate integrally with the drive shaft 14. The movable eccentric weight 12 is pivotally attached via a bearing so as to be rotatable with respect to the drive shaft 14.

  One end of the drive shaft 14 protrudes to the outside of the case 19, and a pulley 16 is attached to the external protruding portion, and the rotational force of a rotation driving means such as a motor (not shown) is transmitted via the pulley 16 and is driven to rotate. The frequency of the drive shaft 14 is controlled by a motor or the like.

  In the present specification, the side on which the rotational force is transmitted to the drive shaft 14 (that is, the side on which the pulley 16 is attached) is referred to as “one end”, and the opposite side is referred to as “the other end”.

  The other end of the drive shaft 14 protrudes to the outside of the case 19, and an amplitude variable device 17 is attached to the external protruding portion. The amplitude variabler 17 has a function of changing the rotational phase difference between the fixed eccentric weight 11 and the movable eccentric weight 12 and maintaining the constant phase difference. The amplitude variable unit 17 is controlled by, for example, hydraulic control from the outside of the case, thereby rotating the movable eccentric weight 12 relative to the fixed eccentric weight 11 or holding it in a relatively stopped state.

  For this purpose, the amplitude variabler 17 includes a variable shaft and a variable case through a bearing. The variable shaft is connected to the coaxial drive shaft 11 and can rotate integrally. On the other hand, the variable case is connected to the movable eccentric weight 12 on the drive shaft 11 and can rotate integrally. Therefore, when the variable case is rotated relative to the variable shaft, the movable eccentric weight 12 is rotated relative to the fixed eccentric weight 11. The amplitude variabler 17 also includes a stopper that prevents relative rotation between the variable shaft and the variable case. By causing the stopper to function, the movable eccentric weight 12 can be held at a predetermined rotational phase difference with respect to the fixed eccentric weight 11 and stopped relatively.

  A specific configuration of such an amplitude variable device 17 is disclosed in, for example, Patent Documents 4 to 6, and is well known. The phase difference control means for controlling the amplitude variable device 17 is, for example, a rotation drive mechanism using a hydraulic motor. The amplitude variabler 17 can change the phase difference between the fixed eccentric weight and the movable eccentric weight even during rotation. The phase difference is continuously variable within a range of less than 180 °. Changes in the amplitude of the vibrator hammer, that is, the vibration energy due to the phase difference are as described above with reference to FIG. 9B. When the phase difference is 180 °, the amplitude of the vibrator hammer is zero, and when the phase difference is minimum, the amplitude is maximum.

  Another pair of fixed eccentric weight 11 and movable eccentric weight 12 are similarly mounted on the rear driven shaft 15.

  Four gears 13 are provided for synchronously rotating all of the two pairs of fixed eccentric weights and movable eccentric weights. The rotational force transmitted to the drive shaft 14 via the pulley 16 is transmitted from the gear 13 on the drive shaft 14 to the gear 13 on the movable eccentric weight 12 on the driven shaft 15. On the other hand, the rotational force transmitted to the drive shaft 14 is also transmitted to the movable eccentric weight 12 on the drive shaft 14 via the amplitude variable device 17 and driven from the gear 13 of the movable eccentric weight 12 on the drive shaft 14. It is transmitted to the gear 13 on the shaft 15 and transmitted to the fixed eccentric weight 11 on the driven shaft 15.

  FIG. 2 is a plan view showing an embodiment in which three biaxial vibro hammers are linked. Among the three units, the left end and the right end are the same as the biaxial vibrator hammer 2 shown in FIG. In the present invention, the biaxial vibro hammer 2 disposed at both ends is referred to as an “end biaxial vibro hammer”. Among the three units, the middle biaxial vibratory hammer 2M shown in FIG. 1 is arranged at the center.

In FIG. 2, the other end of the driven shaft 15 of the left end biaxial vibrator hammer 2 and the one end (other end may be the other end) of the driven shaft 15 of the intermediate biaxial hammer 2M are linked through one linkage means 5. is doing.
Further, the other end of the drive shaft 14 of the right end biaxial vibro hammer 2 and the other end (or one end) of the driven shaft 15 of the intermediate biaxial vibro hammer 2M are linked via another linking means 5. . Thus, since the intermediate biaxial vibro hammer 2M is not attached to both ends of the driven shaft, the linking means can be attached to any end portion of the driven shaft.
For example, a universal joint or a tire coupling is used as the linking means 5.

  As is clear from FIG. 2, the intermediate biaxial vibrator hammer 2M has an amplitude variabler 17 at the other end of the drive shaft 14 instead of the amplitude variabler 17 attached to one end of the driven shaft 15 in the end biaxial vibratory hammer 2. It is the installed configuration. In other words, the configuration in which the amplitude variable device 17 attached to one end of the driven shaft 15 in the end biaxial vibratory hammer 2 is moved to the other end of the drive shaft 14 is the intermediate biaxial vibratory hammer 2M.

  As shown in FIG. 3, the intermediate biaxial vibratory hammer 2 </ b> M having such a configuration can be connected in series between any two end biaxial vibratory hammers 2 in series. The linkage form may be annular or linear. In the linkage between the adjacent intermediate biaxial vibrator hammers 2M, the driven shafts 15 (one end or the other end) are linked by the linkage means 5.

FIG. 4 is a plan view schematically showing an embodiment of an intermediate four-axis vibratory hammer 4M in a pile or wall placing apparatus according to the present invention.
The intermediate four-axis vibratory hammer 4M is arranged between two end four-axis vibratory hammers arranged one at each end when three or more four-axis vibratory hammers are linked in series. Incidentally, the end four-axis vibratory hammer has the same configuration as the four-axis vibratory hammer 4 shown in FIGS. 10A and 12.

  The intermediate four-axis vibratory hammer 4M includes two parallel drive shafts 14 and 15 which are horizontally spaced apart from each other in the upper stage of the case 19 and two parallel to each other in the lower stage. The driven shafts 15 are respectively installed and supported by bearings attached to the case 19. For convenience of illustration, the upper stage and the lower stage are shown separately. Actually, the upper stage and the lower stage are arranged so as to overlap in the vertical direction, and the gears 13 at the corresponding positions of the upper stage and the lower stage are engaged with each other.

  In the upper stage, a pair of fixed eccentric weights 11 and a movable eccentric weight 12 are mounted on the drive shaft 14 at the front (for the sake of convenience, the lower side in the figure is the front and the upper side in the figure is the rear). The fixed eccentric weight 11 is fixed to the drive shaft 14 so as to rotate integrally with the drive shaft 14. The movable eccentric weight 12 is pivotally attached via a bearing so as to be rotatable with respect to the drive shaft 14.

  One end of the drive shaft 14 projects to the outside of the case 19, and a pulley 16 is attached to the external projecting portion, and is driven to rotate through the pulley 16 by a rotational drive means such as a motor (not shown). The frequency of the drive shaft 14 is controlled by a motor or the like.

  The other end of the drive shaft 14 protrudes to the outside of the case 19, and an amplitude variable device 17 is attached to the external protruding portion. The amplitude variabler 17 has a function of changing the rotational phase difference between the fixed eccentric weight 11 and the movable eccentric weight 12 and maintaining the constant phase difference. The amplitude variabler 17 is hydraulically controlled from the outside of the case to rotate or move the movable eccentric weight 12 relative to the fixed eccentric weight 11.

  In the upper stage, another pair of fixed eccentric weight 11 and movable eccentric weight 12 are similarly mounted on the rear driven shaft 15.

  The upper configuration of the intermediate four-axis vibrator hammer 4M is the same as the configuration of the intermediate two-axis vibrator hammer 2M described above. A pulley 16 and an amplitude variable device 17 are attached to both ends of the drive shaft 14, and both ends of the driven shaft 15 are connected. Is configured so that nothing is attached.

  In the lower stage, a pair of fixed eccentric weight 11 and movable eccentric weight 12 are attached to each of the two driven shafts 15. An amplitude variable device 17 is attached to one end (or the other end) of any one of the driven shafts 15. Nothing is attached to both ends of the other driven shaft 15.

  Further, eight gears 13 are provided for synchronously rotating all of the four pairs of fixed eccentric weights and movable eccentric weights. The rotational force transmitted to the upper drive shaft 14 via the pulley 16 is transmitted to the fixed eccentric weight 11 and the movable eccentric weight 12 via the gear 13 and the amplitude variable unit 17.

  FIG. 5 is a plan view showing an embodiment in which three four-axis vibro hammers are linked. Among the three units, the left end and the right end are the same as the four-axis vibrator hammer 4 shown in FIG. In the present invention, the four-axis vibro hammers 4 disposed at both ends are referred to as “end-four-axis vibro hammers”. Among the three units, the intermediate four-axis vibratory hammer 4M shown in FIG. 4 is arranged at the center.

In FIG. 5, the other end of the upper driven shaft 15 of the left end end four-axis vibratory hammer 4 and one end (other end may be the other end) of the upper driven shaft 15 of the intermediate four-axis vibratory hammer 4M are connected to one linkage means 5. Are linked through.
Further, the other end of the upper drive shaft 14 of the right end end four-axis vibro hammer 4 and the other end (or one end) of the driven shaft 15 of the intermediate four-axis vibro hammer 4M are linked via another linkage means 5. ing. Thus, since nothing is attached to both ends of the upper driven shaft, the intermediate four-axis vibro hammer 4M can be attached to any end portion of the upper driven shaft.
In the lower stage, the driven shafts 15 to which the amplitude variable device 17 is not attached (that is, nothing is attached) are linked via the linkage means 5.

  As is apparent from FIG. 5, the upper stage of the intermediate four-axis vibrator hammer 4M has an amplitude at the other end of the drive shaft 14 instead of the amplitude variabler 17 attached to one end of the driven shaft 15 in the upper stage of the end four-axis vibrator hammer 4. The variable device 17 is attached. In other words, the intermediate four-axis vibrator hammer 4M has a configuration in which the amplitude variable device 17 attached to one end of the driven shaft 15 in the upper stage of the end four-axis vibrator hammer 4 is moved to the other end of the drive shaft 14.

  Although not shown, the four-axis vibratory hammer is also connected in series with any number of intermediate four-axis vibratory hammers 4M between the two end four-axis vibratory hammers 4 in the same manner as the linkage of any number of two-axis vibratory hammers shown in FIG. It is possible to link to. The linkage form may be annular or linear. In the linkage between the adjacent intermediate four-axis vibratory hammers 4M, the driven shafts 15 (which may be either one end or the other end) are linked via the linkage means 5 in the upper stage, and the amplitude variable device 17 is not mounted in the lower stage. The driven shafts 15 (that is, nothing is attached) are linked via the linkage means 5 (either one end or the other end).

  In the four-axis vibratory hammer shown in FIGS. 4 and 5, an example in which the drive shaft is provided in the upper stage is shown as an example, but a form in which the drive shaft and the driven shaft are provided in the lower stage and two driven shafts are provided in the upper stage, The upper and lower stages of the four-axis vibro hammer shown in FIGS. 4 and 5 may be replaced.

  6A and 6B are plan views schematically and schematically showing an example of a general form of a pile or wall placing apparatus according to the present invention. The illustration of the fixed / movable eccentric weight is omitted. In these embodiments, three or more multi-axis vibro hammers are linked. End multi-axis vibratory hammers R and L are arranged at both ends, and an intermediate multi-axis vibratory hammer M is arranged between them and linked by the linkage means 5.

  The multi-axis vibro hammer has a configuration in which one (1) stage or a plurality of (n) stages are stacked in the vertical direction (for convenience of illustration, the plan view of each stage is shown in a vertical arrangement). The case of one stage corresponds to the above-described biaxial vibro hammer, and the case of two stages of biaxial corresponds to the above-described four-axis vibro hammer.

In one embodiment of FIG. 6A, there is a vibratory hammer having n stages in the vertical direction and two axes arranged horizontally in each stage, a six-axis vibratory hammer in the case of three stages, and a four-stage case. Is an eight-axis vibro hammer.
In another embodiment of FIG. 6B, there are n stages in the vertical direction, each stage other than the nth stage is provided with two axes aligned in the horizontal direction, and the nth stage has four axes aligned in the horizontal direction. Provided.

  In addition to FIGS. 6A and 6B, various modifications of the multi-axis vibratory hammer may exist. The common configuration is as follows. In the case of having a plurality of stages, one drive shaft 14 and one driven shaft 15 are provided in one of them. A plurality of driven shafts 15 are provided in a stage having no drive shaft. A fixed eccentric weight 11 and a movable eccentric weight 12 are mounted on each of the drive shaft 14 and all the driven shafts 15, and the rotational force applied to the drive shaft 14 is all fixed eccentric weight 11 and the movable eccentric weight by a gear. 12 is transmitted.

The end multi-axis vibro hammers L and R arranged at both ends have a pulley 16 attached to one end of the drive shaft 14 and an amplitude variabler 17 attached to one end of the driven shaft in the stage where the drive shaft 14 is provided. .
On the other hand, the intermediate multi-axis vibrator hammer M is provided with a pulley 16 at one end of the drive shaft 14 and an amplitude variable device 17 at the other end of the drive shaft 15 at the stage where the drive shaft 14 is provided.

As shown in FIGS. 6A and 6B, in the stage where the drive shaft 14 is provided, the other end of the drive shaft 14 of the left end multi-axis vibrator hammer L is one end of the driven shaft 15 of the intermediate multi-axis vibrator hammer M. (It may be the other end). Further, the other end of the driven shaft 15 of the right-side end multi-axis vibratory hammer R is linked to the other end (or one end) of the driven shaft 15 of the intermediate multi-axis vibratory hammer M. The intermediate multi-axis vibratory hammers M are linked to each other by the driven shafts 15.
On the other hand, in a stage without a drive shaft, it is linked to an adjacent vibrator hammer by any driven shaft.

  FIG. 7A shows an embodiment of the present invention to which the intermediate biaxial vibratory hammer 2M shown in FIG. 1, the intermediate four-axis vibratory hammer 4M shown in FIG. 4, or the intermediate multiaxial vibratory hammer M exemplified in FIGS. 6A and 6B is applied. It is the top view which showed typically the state which attached the installation apparatus 10 to the steel plate cell 200, (b) is a schematic front view (The inside of a dotted line enclosure is abbreviate | omitted). The placing device 10 includes an annular base member 8 having a shape along the upper edge of the steel plate cell 200, a gripping device 9 that is attached to the lower surface of the base member 8 and grips the upper edge of the steel plate cell 200, Twelve vibratory hammers arranged and fixed in an annular shape on the upper surface of the base member 8 are provided. When the vibro hammer is a biaxial vibro hammer, the biaxial hammer is composed of an end biaxial vibro hammer 2 at both ends and an intermediate biaxial vibro hammer 2M therebetween. In the case where the vibratory hammer is a four-axis vibratory hammer, it is composed of an end four-axis vibratory hammer 4 at both ends and an intermediate four-axis vibratory hammer 4M between them. When the vibratory hammer is a multiaxial vibratory hammer, it is composed of end multiaxial vibratory hammers R and L at both ends and an intermediate multiaxial vibratory hammer M between them.

  In FIG. 7, adjacent vibro hammers are linked to each other by a universal joint 5. When a large number of vibratory hammers are linked in series via a large number of universal joints, there is a problem that rotation transmission advance / delay and angular error are accumulated in each connection. In particular, when a large number of vibratory hammers are arranged in an annular shape, as in the prior art shown in FIG. 8, if the vibratory hammer located at the start end and the vibratory hammer located at the end are linked, the synchronous operation is adversely affected. Therefore, in order to reduce this problem, when a large number of vibratory hammers are arranged in a ring shape, it is preferable that the vibratory hammer located at the start end and the vibratory hammer located at the end are not linked to each other. That is, it is effective not to completely close a ring in which a large number of vibratory hammers are linked, but to separate one part of the ring and release it.

  According to the present invention, three or more vibratory hammers linked in series can be tuned by automatic control. Control for making the frequencies coincide with each other is performed by a rotation driving means outside the case, and is performed for each corresponding drive shaft via each pulley. Control of the phase difference in each set of fixed and movable eccentric weights is performed on each amplitude variable device by phase difference control means outside the case.

  The pile or wall placing device of the present invention can be suitably applied to large-diameter annular or arcuate piles, long linear or rectangular wall bodies, and the like. The base is shaped along the upper edge of the applied pile or wall, and the plurality of vibratory hammers are arranged and fixed at a predetermined interval on the upper surface of the base.

2: (end part) biaxial vibro hammer 2M: intermediate biaxial vibro hammer 4: (end part) four-axis vibro hammer 4M: intermediate four-axis vibro hammer L, R: end multi-axis vibro hammer M: intermediate multi-axis vibro hammer 5: linkage means 8 : Base member 9: gripping device 11: fixed eccentric weight 12: movable eccentric weight 13: gear 14: drive shaft 15: driven shaft 16: pulley 17: amplitude variable device 19: case 10: driving device 100: driving Equipment (conventional)

Claims (8)

A base member (8), a gripping device (9) attached to the lower surface of the base member (8) in order to grip a pile or wall, and three or more units fixed on the upper surface of the base member (8) In a pile or wall placing apparatus comprising a biaxial vibratory hammer and a rotational drive means for rotationally driving the three or more biaxial vibratory hammers for synchronous operation,
(A) The three or more biaxial vibro hammers are disposed between one end biaxial vibro hammer (2) and one end biaxial vibro hammer (2). Including at least one intermediate biaxial vibro hammer (2M),
(B) Both the end biaxial vibro hammer (2) and the intermediate biaxial vibro hammer (2M) have a drive shaft (14) and a driven shaft (15) that transmit the rotational force of the rotational drive means to one end. Is provided,
(C) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and the driven shaft (15), and the drive shaft (14). Rotational force transmitted to one end of each of the fixed eccentric weight (11) and the movable eccentric weight (12) is transmitted to a plurality of gears (13),
(D) In the end biaxial vibro hammer (2), an amplitude variabler (17) for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11), While attached to one end of the driven shaft (15),
(E) In the intermediate biaxial vibro hammer (2M), the amplitude variabler (17) for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) includes: It is attached to the other end of the drive shaft (15)
(F) In the linkage of the end biaxial vibratory hammer (2) and the intermediate biaxial vibratory hammer (2M), the other end of the drive shaft (14) or the driven shaft (15) in the end biaxial vibratory hammer (2) And one end or the other end of the driven shaft (15) in the intermediate biaxial vibratory hammer (2M) are linked by a linkage means (5), and
(G) In the linkage between the adjacent intermediate biaxial vibro hammers (2M), the driven shafts (15) are linked by the linkage means (5). A base member (8), a gripping device (9) attached to the lower surface of the base member (8) in order to grip a pile or wall, and three or more units fixed on the upper surface of the base member (8) In a pile or wall body placing device comprising a four-axis vibratory hammer and a rotational driving means for rotationally driving each of the three or more four-axis vibratory hammers for synchronous operation,
(A) The three or more four-axis vibratory hammers are arranged between one end four-axis vibratory hammer (4) and one end four-axis vibratory hammer (4). Including at least one intermediate four-axis vibro hammer (4M),
(B) Both the end four-axis vibratory hammer (4) and the intermediate four-axis vibratory hammer (4M) have a first stage and a second stage in the vertical direction, and the first stage includes: A drive shaft (14) and a driven shaft (15) that transmit the rotational force of the rotational drive means to one end are provided, and two driven shafts (15) are provided in the second stage,
(C) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and the three driven shafts (15), and the drive shaft ( The rotational force transmitted to one end of 14) is transmitted to all the fixed eccentric weight (11) and the movable eccentric weight (12) by a plurality of gears (13),
(D) In the first stage of the end four-axis vibratory hammer (4), an amplitude variable device for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) (17) is attached to one end of the driven shaft (15),
(E) In the first stage of the intermediate four-axis vibratory hammer (4M), an amplitude variabler for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) ( 17) is attached to the other end of the drive shaft (14),
(F) In the first stage linkage of the end four-axis vibratory hammer (4) and the intermediate four-axis vibratory hammer (4M), the drive shaft (14) or the driven shaft in the end four-axis vibratory hammer (4) The other end of (15) and one end or the other end of the driven shaft (15) in the intermediate four-axis vibro hammer (4M) are linked by the linkage means (5), and
(G) In the linkage of the first stages of the adjacent intermediate four-axis vibratory hammers (4M), the driven shafts (15) are linked by the linkage means (5). Placement device. A base member (8), a gripping device (9) attached to the lower surface of the base member (8) in order to grip a pile or wall, and three or more units fixed on the upper surface of the base member (8) In a pile or wall placing apparatus comprising a multi-axis vibro hammer and a rotational drive means for rotationally driving each of the three or more multi-axis vibro hammers for synchronous operation,
(A) The three or more multi-axis vibro hammers are arranged between one end multi-axis vibro hammer (R, L) and one end multi-axis vibro hammer (R, L). And at least one intermediate multi-axis vibro hammer (M) disposed in the
(B) Both the end multi-axis vibro hammer (R, L) and the intermediate multi-axis vibro hammer (M) have one or more stages in the vertical direction, and one of the one or more stages. Is provided with one drive shaft (14) and one driven shaft (15) for transmitting the rotational force of the rotational drive means to one end, and when there are other stages, a plurality of stages are provided in each stage. A driven shaft (15) is provided,
(C) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and all the driven shafts (15), and the drive shaft ( The rotational force transmitted to one end of 14) is transmitted to all the fixed eccentric weight (11) and the movable eccentric weight (12) by a plurality of gears (13),
(D) In the stage provided with the drive shaft (14) of the end multi-axis vibratory hammer (R, L), the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) is calculated. While an amplitude variable device (17) for changing or holding is attached to one end of the driven shaft (15),
(E) In the stage provided with the drive shaft (14) of the intermediate multi-axis vibratory hammer (M), the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) is changed or held. An amplitude variable device (17) is attached to the other end of the drive shaft (14),
(F) In the linkage of the stage provided with the drive shaft (14) of the end multi-axis vibro hammer (R, L) and the intermediate multi-axis vibro hammer (M), the end multi-axis vibro hammer (R, L) The other end of the drive shaft (14) or driven shaft (15) in L) and one end or the other end of the driven shaft (15) in the intermediate multi-axis vibro hammer (M) are linked by linkage means (5), and ,
(G) In the linkage of the stages provided with the drive shaft (14) of the adjacent intermediate multi-axis vibro hammer (M), the driven shafts (15) are linked by the linkage means (5). Pile or wall placing device as a feature.   In the pile or wall placing device according to any one of claims 1 to 3, when three or more vibratory hammers are arranged and fixed in an annular shape and adjacent vibratory hammers are linked together, a vibratory hammer and a terminal located at the starting end A pile or wall body placing device characterized by not being linked to each other with a vibro hammer located in the wall. An intermediate biaxial vibratory hammer arranged at a position other than both ends in order to link three or more biaxial vibratory hammers,
(A) provided with a drive shaft (14) and a driven shaft (15) for transmitting the rotational force of the rotational drive means to one end;
(B) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and the driven shaft (15), and the drive shaft (14). Rotational force transmitted to one end of each of the fixed eccentric weight (11) and the movable eccentric weight (12) is transmitted to a plurality of gears (13),
(C) An amplitude variable device (17) for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) is attached to the other end of the drive shaft (15). An intermediate biaxial vibro hammer. An intermediate four-axis vibratory hammer arranged at a position other than both ends in order to link three or more four-axis vibratory hammers,
(A) It has a 1st stage and a 2nd stage in the up-and-down direction, and a drive shaft (14) and a driven shaft (15 ), And the second stage is provided with two driven shafts (15),
(B) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and the three driven shafts (15), and the drive shaft ( The rotational force transmitted to one end of 14) is transmitted to all the fixed eccentric weight (11) and the movable eccentric weight (12) by a plurality of gears (13),
(C) In the first stage, an amplitude variable unit (17) for changing or holding a phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) includes the drive shaft ( 14) An intermediate four-axis vibro hammer characterized by being attached to the other end. In order to link three or more multi-axis vibro hammers, it is an intermediate multi-axis vibro hammer disposed at a position other than both ends,
(A) One or more stages are provided in the vertical direction, and one of the one or more stages is provided with one drive shaft (14) and 1 for transmitting the rotational force of the rotational drive means to one end. One driven shaft (15) is provided, and when there are other stages, a plurality of driven shafts (15) are provided in each stage,
(B) A pair of fixed eccentric weight (11) and movable eccentric weight (12) are mounted on each of the drive shaft (14) and all the driven shafts (15), and the drive shaft ( The rotational force transmitted to one end of 14) is transmitted to all the fixed eccentric weight (11) and the movable eccentric weight (12) by a plurality of gears (13),
(C) In the stage provided with the drive shaft (14), the amplitude variabler (17) for changing or holding the phase difference of the movable eccentric weight (12) with respect to the fixed eccentric weight (11) Is attached to the other end of the drive shaft (14). In the pile or wall placing method using the pile or wall placing apparatus according to any one of claims 1 to 3,
After setting the phase difference between each pair of fixed eccentric weight (11) and movable eccentric weight (12) by the amplitude variable device (17) so that the amplitude of each vibrator hammer becomes zero, the rotation drive means Starting rotation driving of each vibrator hammer;
Increasing the frequency of each vibratory hammer while maintaining the amplitude of each vibratory hammer at zero until it passes through a region of frequency that causes resonance with the base member of the driving device or the surrounding ground; and
After reaching a predetermined frequency higher than the resonance frequency range, the amplitude variable device (17) causes the phase difference between the fixed eccentric weight (11) and the movable eccentric weight (12) of each pair. To change the amplitude of each vibro hammer to an appropriate amplitude for placing, and placing a pile or wall body,
After completing the placement, the amplitude variable (17) is used to set the phase difference between the fixed eccentric weight (11) and the movable eccentric weight (12) of each pair so that the amplitude of each vibrator hammer becomes zero again. And a step of reducing and stopping the frequency of each vibratory hammer after the change, and a method for placing a pile or wall body.

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