JP2014237938A - Vibro-hammer unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibro-hammer unit suitable for installing a medium-scale or small-scale pile and a wall body, by mutually connecting the shafts of vibro-hammers by a simple linkage member.SOLUTION: The vibro-hammer unit 10 is constituted of a base member 3, three or more of vibro-hammers 1A, 1B, 1C and 1D mounted on the base member 3 and one linkage member 2A, 2B and 2C (two or more of the linkage members as a whole) for connecting the shafts of two vibro-hammers among the three or more of vibro-hammers. In the two vibro-hammers mutually connected by the one linkage member, the shafts possessed by the two vibro-hammers are opposed, and the mutually opposed shafts are connected by the linear linkage members 2A, 2B and 2C, and all the two or more of linkage members 2A, 2B and 2C for mutually connecting the three or more of vibro-hammers 1A, 1B, 1C and 1D are arranged in the same direction.

Description

  The present invention relates to a vibratory hammer unit composed of three or more vibratory hammers.

  When placing a relatively large-diameter pile (steel pipe pile, PC pile, etc.) or a wall body composed of long steel plate cells in the ground, it is enormous if it is driven by a single vibro hammer. A vibro hammer having a large physique capable of exhibiting a sufficient driving force is required, and there is a problem in economical efficiency and transportability in producing such a large vibro hammer and transporting it to the site.

  In view of such a problem, two or more vibratory hammers are attached to the ceiling of a pile or a wall, and one vibratory hammer unit is configured by linking them to each other to enable synchronous operation. It is.

  Turning to the conventional published technology, Patent Document 1 describes that six exciters (vibrated hammers) are mounted on an annular base, and the shafts of each exciter are connected to each other from a universal joint and an intermediate interlocking shaft. There has been disclosed a wall body placing apparatus constituted by connecting with a constructed linkage member.

  The wall body placing device disclosed in Patent Document 1 is intended for placing a very large wall body. For that purpose, the shafts of the vibrators are opposed to each other with a linear linkage member. I can't connect.

  That is, as shown in FIG. 1, a universal joint that allows the angle of the linkage member to be freely tilted is essential for the linkage member that connects the shafts of two exciters, and two universal joints and two intermediate linkages are required. A large linking member composed of a shaft must be an essential component. In view of the arrangement mode of the vibrator and the linkage mode by the large linkage member, it is considered that a wall body having a diameter of 10 m or more is set as an object to be placed.

  By the way, when the wall body placing device disclosed in Patent Document 1 is applied to, for example, medium or small piles or wall bodies having a diameter of about 5 m or less, they are connected to each other. The angle between the two exciter shafts is an acute angle, and it is highly possible that even a universal joint cannot be used. With a large linkage member as disclosed in Patent Document 1, the shafts of the exciter are connected to each other. I can't.

  In this way, although it is difficult to drive with a single vibro hammer unit, the scale is suitable for driving piles and walls with a diameter of about 5 m or less, which belong to the medium or small category. Development of vibro hammer units is eagerly desired in the art.

Japanese Patent Publication No. 61-22692

  The present invention has been made in view of the above-mentioned problems, and provides a vibratory hammer unit suitable for placing medium-scale or small-scale piles and walls by connecting shafts of vibratory hammers with a simple linkage member. The purpose is to do.

  In order to achieve the above object, a vibratory hammer unit according to the present invention connects a base member, three or more vibratory hammers mounted on the base member, and shafts of two of the three vibratory hammers. Two vibro hammer units composed of two linking members (two or more linking members as a whole) and connected to each other by a single linking member. Both opposing shafts are connected by a linear connecting member, and two or more connecting members that connect three or more vibrator hammers to each other are all arranged in the same direction. .

  The vibratory hammer unit according to the present invention is arranged such that two or more vibratory hammers mounted on a base member face each other so that the axes of two adjacent vibratory hammers face each other. It has the characteristic in having made it the structure connected with this linkage member. Medium and small piles with a diameter of about 5m or less (for example, about 3m) by adopting a configuration in which the shafts of both adjacent vibro hammers face each other and both shafts are connected by a linear linkage member It is possible to grip the entire top end of the wall and the wall, which is suitable when placing these medium and small-scale piles and walls into the ground or pulling them out.

  Here, the “pile” to be driven or pulled out includes steel pipe piles, concrete piles such as PC piles, RC piles and PHC piles, and synthetic piles such as SC piles and steel pipe soil cement piles. The cross-sectional dimension is a pile with a diameter of about 5m (about 4-6m) or less (about 3m).

  Similarly, the `` wall body '' that is the object of placing and pulling out includes, for example, an annularly assembled sheet pile or steel plate, and its cross-sectional dimension is about 5 m in diameter (4 About 6 m) or less, or when the planar shape is a rectangular frame, the wall is about 5 m on a side.

  In addition, the “base member” is composed of a steel plate, a three-dimensional body formed by assembling a plurality of steel plates or stiffeners, etc., and the planar shape is annular, rectangular, polygonal, etc. It has a planar shape corresponding to the planar shape of the construction object such as a pile. Three or more vibratory hammers are fixed to the base member, and chucks (clamping members) of the vibratory hammers protrude from the lower side of the base member so that the top ends of piles to be constructed can be gripped.

  Further, the “linking member” includes a linear casing, a steel pipe, a steel bar, and the like. Further, for example, the casing having a length L may be a unit body composed of two casings having a length L / 2 and an elastic member such as a tire coupling interposed therebetween, and this unit body as a whole One linking member is configured, and the elastic member exhibits an impact buffering action.

  Each vibrator hammer is provided with a drive source such as a drive motor. For example, a drive force by the drive source is converted into a forced vibration in the vertical direction of the vibrator hammer via a pulley mounted on the drive shaft. Note that a hydraulic motor may be applied as the drive motor.

  The vibrator hammers are connected to each other by a linear connecting member, and can be operated synchronously. Here, the synchronized operation is an operation in which the vibration phases of a plurality of vibratory hammers linked to each other are matched.

  In this way, when three or more vibratory hammers are connected to each other via the linkage members and all the vibratory hammers are operated synchronously, the kinetic energy in the vertical direction of each vibratory hammer is uniformly transmitted to the piles and walls. be able to. Furthermore, it is possible to cope with the problem by adjusting the number of vibratory hammers constituting the vibratory hammer unit according to the scale of the pile or wall without having to increase the size of each vibratory hammer.

  Here, when the number of vibratory hammers constituting the vibratory hammer unit and the arrangement form of each vibratory hammer are exemplified, the number of vibratory hammers is various, such as three, four, six, eight. On the other hand, as the arrangement form of each vibrator hammer, for example, when a vibrator hammer unit is constituted by four vibrator hammers, each vibrator hammer is arranged at the position of 0 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock. Each of the two shafts of the vibratory hammer arranged, the shaft of the vibratory hammer arranged at the 3 o'clock position, and the shaft of the vibratory hammer arranged at the 9 o'clock position are opposed to each other, and are linearly linked members. For example, a vibro hammer arranged at 9 o'clock and a vibro hammer arranged at 6 o'clock are opposed to each other, and are arranged by a linear linkage member. Can do.

  As can be understood from the above description, according to the vibrator hammer unit of the present invention, the shafts of both adjacent vibrator hammers are opposed to each other, and both shafts are connected by a linear link member, and all the link members are in the same direction. It is possible to grip the top and bottom of medium and small-sized piles and walls with a diameter of about 5 m or less. It is a suitable construction device when placing the body in the ground or withdrawing it. Furthermore, the linkage member constituting the vibrator hammer unit is a linear member, and the structure thereof is simple, the manufacturing cost of the vibrator hammer unit is not expensive, and the assembly of the vibrator hammer unit in the field is also good. .

It is a front view of Embodiment 1 of the vibratory hammer unit of the present invention. It is an II-II arrow line view of FIG. It is the III-III arrow line view of FIG. It is the figure which showed FIG. 3 typically. It is the figure which showed Embodiment 2 of the vibratory hammer unit typically, and is a figure corresponding to FIG.

  Hereinafter, embodiments of the vibratory hammer unit of the present invention will be described with reference to the drawings. In addition, although the construction object of the vibratory hammer unit of the example of illustration is a pile, it is needless to say that the wall body etc. which assembled | attached a sheet pile etc. to cyclic | annular form etc. may be sufficient.

(Embodiment 1 of vibratory hammer unit)
1 is a front view of Embodiment 1 of the vibratory hammer unit of the present invention, FIGS. 2 and 3 are views taken along arrows II-II and III-III in FIG. 1, respectively, and FIG. FIG.

  The illustrated vibratory hammer unit 10 includes four vibratory hammers 1A, 1B, 1C, and 1D disposed at the 0, 3, 6:00, and 9:00 positions on the annular base member 3, and each of the vibratory hammers 1A, 1B. , 1C, 1D are suspended by a suspension ring 4 via a shock absorber 6 by a wire 5 and are generally constructed as a whole. The suspension ring 4 is coupled via a wire 7 by a heavy machine such as a crane (not shown). Used by being suspended. In addition to the example shown in the figure, the shock absorber may be integrated with the vibratory hammer, and such a shock absorber-integrated vibratory hammer may be suspended on a suspension ring to constitute a vibratory hammer unit. .

  Regarding the arrangement of the four vibratory hammers 1A, 1B, 1C, 1D, the two adjacent vibratory hammers are arranged so that the axes of the two vibratory hammers are opposed to each other, and both the axes are arranged in a single linear linkage member 2A. , 2B, 2C.

  Here, in consideration of the fact that the planar shape of the pile P that is the construction object is circular, the annular base member 3 is applied with a planar shape that conforms to this planar shape. In the case of an oval or rectangular frame, it is desirable to apply a planar base member corresponding to these planar shapes. And the base member 3 shown in figure arranges the cyclic | annular steel plate material up and down, these are connected by welding etc. with a cylindrical steel plate, the appropriate stiffener is connected to the side surface, and the whole is It is configured.

  The construction foundation of the vibratory hammer unit 10 shown in the figure, that is, the foundation to be placed in the ground, is a pile P (steel pipe pile, PC pile, RC pile, PHC pile, etc.) with a scale of about 5 m in diameter. SC piles, steel pipe soil cement piles, etc.).

  For a pile P having a circular shape in plan view and a diameter of about 5 m, the four vibrator hammers 1A, 1B, 1C, and 1D are made to face each other at the 0, 3, 6, and 9 o'clock positions. Arrange in the correct posture. In the state where four vibrator hammers 1A, 1B, 1C, and 1D are mounted on the base member 3, chucks 1A1, 1B1, and 1C1 of each vibrator hammer (the chuck of the vibrator hammer 1D is not shown) protrude from below the base member 3. The top of the pile P can be gripped.

  Here, an example of the internal structure of the vibratory hammer 1A and the like will be outlined. Of course, the internal structure of the vibratory hammer 1A or the like may be a simpler structure than the structure shown below, for example, a structure that does not include a mechanism for controlling the eccentric moment.

  In order to be able to control the eccentric moment in the vibratory hammer 1A, etc., in the vibratory hammer 1A, etc., a pair of eccentric weights consisting of a fixed eccentric weight and a movable eccentric weight rotating synchronously with each other are mounted on one axis. The entire eccentric moment can be changed by changing the rotational phase difference between the pair of eccentric weights, and the amplitude of the single vibrator hammer can be adjusted from zero to the maximum.

  The vibratory hammer 1A and the like is a two-axis vibratory hammer having a fixed eccentric weight and a movable eccentric weight, and includes a driving shaft and a driven shaft (in the figure, only the shafts connected by the linking member in each vibratory hammer are shown). It has a shaft. A pulley (not shown) is attached to the drive shaft, and a rotational force is transmitted by a drive source such as a drive motor (not shown) so as to be driven to rotate. Each of the drive shaft and the driven shaft is equipped with a fixed eccentric weight fixed so as to rotate together with the shaft and a movable eccentric weight not fixed to the shaft, and the two-axis vibro hammer has two pairs of fixed eccentric weights. And a structure having a movable eccentric weight.

  In the vibrator hammer unit 10 shown in the figure, the axes of the adjacent vibrator hammers are opposed to each other, and this opposed axis means one of the drive shaft and the driven shaft described above.

  As shown in FIGS. 3 and 4, each of the two shafts 1A2 and 1A2 ′ of the vibrator hammer 1A disposed at the 0 o'clock position and the shaft 1B2 of the vibrator hammer 1B disposed at the three o'clock position, and 9 o'clock The shafts 1D2 of the vibratory hammer 1D disposed at the positions are opposed to each other and connected to each other by linear linkage members 2A and 2B. Furthermore, the vibro hammer 1D disposed at the 9 o'clock position and the shafts 1D2 'and 1C2 of the vibro hammer 1C disposed at the 6 o'clock position are opposed to each other and connected to each other by a linear linkage member 2C.

  Here, the linking members 2A, 2B, 2C are composed of a linear casing, a steel pipe, a steel bar, and the like. Moreover, you may apply the thing of the structure which connected two casings etc. linearly via elastic members, such as a tire coupling.

  As shown in the figure, the three linear connecting members 2A, 2B, and 2C are all arranged in the same direction (in FIGS. 3 and 4, the direction connecting 0 o'clock and 6 o'clock).

  As shown in the figure, among the vibratory hammers 1A, 1B, 1C, and 1D, the adjacent vibratory hammer shafts are arranged so as to face each other, so that they can be easily connected to each other by a linear linkage member. When a relatively small pile P or the like is a construction target, four places of the pile P can be gripped by the chucks 1A1, 1B1, 1C1, etc. of the vibrator hammers 1A, 1B, 1C, 1D.

  Further, the three linkage members 2A, 2B, and 2C constituting the vibratory hammer unit 10 are all linear members, and all of them are arranged in the same direction. Therefore, the configuration of the linking member can be simplified, and the configuration of the entire unit 10 can be simplified and the production cost of the unit 10 resulting therefrom can be reduced.

(Embodiment 2 of vibratory hammer unit)
FIG. 5 is a view schematically showing Embodiment 2 of the vibratory hammer unit, and corresponds to FIG.

  In the illustrated vibratory hammer unit 10A, in the annular base member 3, two vibratory hammers 1A and 1C are arranged at the 0 o'clock and 6 o'clock positions, and two vibratory hammers 1E and 1F are arranged between 0 o'clock and 6 o'clock. Two vibrator hammers 1G and 1H are disposed between 6 o'clock and 0 o'clock.

  Each of the two shafts 1A2 and 1A2 'of the vibratory hammer 1A disposed at the 0 o'clock position, the shaft 1E2 of the vibratory hammer 1E adjacent thereto, and the shaft 1H2 of the vibratory hammer 1H are opposed to each other, and are linearly linked members. Connect with 2D, 2F. Further, the vibratory hammer 1E and the shafts 1E2 ′ and 1F2 of the vibratory hammer 1F adjacent to the vibratory hammer 1E are opposed to each other, the vibratory hammer 1H and the shafts 1H2 ′ and 1G2 of the vibratory hammer 1G adjacent thereto are opposed to each other, and the linear linkage members 2E are mutually connected. Connect with 2G. Further, the shaft 1C2 of the vibratory hammer 1C disposed at the 6 o'clock position and the shaft 1G2 'of the vibratory hammer 1G adjacent thereto are opposed to each other and connected to each other by a linear linkage member 2H.

  Thus, even if six vibrator hammers 1A etc. are applied, the axis | shafts of an adjacent vibrator hammer can be connected with a linear linkage member, and the top end of the pile P can be hold | gripped.

  Also in the vibratory hammer unit 10A, the five linear connecting members 2D, 2E, 2F, 2G, and 2H are all arranged in the same direction (in FIG. 5, the direction connecting 0 o'clock and 6 o'clock). ing.

  In addition, although illustration is abbreviate | omitted, in addition to the vibratory hammer unit 10 and 10A to show in figure, the vibratory hammer unit etc. which were comprised from three or eight vibratory hammers etc. may be sufficient, for example, the planar magnitude | size and planar shape of construction object The number of vibratory hammers constituting the vibratory hammer unit varies. For example, in a vibratory hammer unit composed of three vibratory hammers, the vibratory hammer 1C is removed from the four vibratory hammers shown in FIG. 4 to make three, and the vibratory hammers 1B and 1D are shifted from the 3 o'clock and 9 o'clock positions to the 6 o'clock side, respectively. For example, a configuration in which the interval between the three vibrator hammers 1A, 1B, and 1D is set at an interval of 120 degrees can be given. In this embodiment, two linear linkage members 2A and 2B are applied, but the two linear linkage members 2A and 2B are both in the same direction (in FIG. 4, 0 o'clock and 6 o'clock). It is the same as that of the vibrator hammer units 10 and 10A.

  Further, when the object to be placed is a straight wall body in plan view, for example, three or four vibrator hammers are arranged at intervals along the straight line of the wall body, and adjacent vibrator hammers are straightened. It is also possible to configure and apply a vibratory hammer unit that is connected by a linking member in the form of a member (in this case, all the linking members are directed in the same direction along the straight line of the wall).

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

  1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H ... Vibro hammer, 1A2, 1A2 ', 1B2, 1C2, 1D2, 1D2', 1E2, 1E2 ', 1F2, 1G2, 1G2', 1H2, 1H2 '... axis 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H ... linkage member (linear linkage member), 3 ... base member, 4 ... suspension ring, 5, 7 ... wire, 6 ... shock absorber, 10, 10A ... Vibro hammer unit (unit), P ... Pile

Claims (3)

A base member;
Three or more vibratory hammers mounted on the base member;
A vibratory hammer unit comprising one linkage member (two or more linkage members as a whole) that connects the shafts of two vibratory hammers out of three or more vibratory hammers,
The two vibratory hammers connected to each other by one linkage member are opposed to each other by the shafts of both vibratory hammers, and the two opposite shafts are connected by a linear linkage member.
A vibratory hammer unit in which two or more linking members connecting three or more vibratory hammers to each other are all arranged in the same direction.   The vibratory hammer unit according to claim 1, wherein the linking member includes only a linear casing. The base member has a planar shape adapted to the planar shape of the construction object,
The vibratory hammer unit according to claim 1 or 2, wherein each vibratory hammer is disposed on the base member so that the axes of adjacent vibratory hammers face each other.

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