JP6587916B2 - Casing placing machine and casing landfill method - Google Patents

Description

  The present invention relates to a casing placement machine and a casing landfill method, and more particularly to a casing placement machine and a casing landfill method that are easy to work.

As a method of reclaiming casings such as steel pipe piles and steel sheet piles, the casing is driven by the vibration of a casing driving machine having a vibration generator such as a vibro foncer, and the earth, sand, rolling stones, and cobbles in the casing. A method is known that repeats Nakabori, which digs them with a grab hammer.
For this construction method, for example, a casing driving machine as shown in FIG. 1 is used. In this casing driving machine, the casings are driven by sandwiching each of the opposing flanges at the upper end of the casing with a chuck and applying vibration. However, since the casing driving machine covers the upper end of the casing, the casing driving machine must be removed every time the casing is drilled after the casing is installed. This takes time.
On the other hand, in the casing driving machine shown in Patent Document 1, it is possible to dig up with the casing driving machine attached to the casing. However, since this casing driving machine is also attached to the upper end of the casing, it becomes unstable when the casing is high, and landfilling work becomes difficult.

JP 2013-53495 A

  The present invention has been made to solve the above-described problems of the prior art, and it is an object of the present invention to provide a casing placement machine and a casing landfill method that facilitate the casing landfill work.

  According to a first aspect of the present invention, there is provided a vibration generator, a chuck portion for sandwiching a casing to be reclaimed from the side of the casing, and the vibration generator mounted thereon, and transmitting vibrations of the vibration generator to the chuck portion. And a transmission portion, the transmission portion having a hole through which the casing is inserted in the vertical direction.

  According to a second aspect of the present invention, the chuck portion includes two curved arm portions that face each other, a shaft support portion that pivotally supports one end of each of the two arm portions, and each of the two arm portions. The casing driving machine according to claim 1, further comprising an expansion / contraction portion that connects the other ends and opens and closes the two arm portions.

  According to a third aspect of the present invention, there is provided a vibration generator, a chuck portion for sandwiching a casing to be reclaimed from the side of the casing, and the vibration generator is mounted, and the vibration of the vibration generator is transmitted to the chuck portion. A transmission part, wherein the transmission part is a method of reclaiming the casing using a casing placement machine having a hole portion through which the casing is inserted in the vertical direction, and sandwiching the casing by the casing placement machine, The present invention relates to a casing reclamation method comprising a placing step for placing a casing and a middle ditch step for excavating the inside of the casing.

  According to a fourth aspect of the present invention, there is provided a vibration generating device, a chuck portion for sandwiching a casing to be reclaimed from the side of the casing, and the vibration generating device mounted thereon, and transmitting the vibration of the vibration generating device to the chuck portion. A transmission portion, wherein the chuck portion is opposed to two curved arm portions, a shaft support portion that pivotally supports one end of each of the two arm portions, and the other end of each of the two arm portions. And a telescopic part that opens and closes the two arm parts, and the transmission part is a method of reclaiming the casing by using a casing driving machine having a hole part through which the casing is inserted vertically. And a casing landing method comprising: a placing step for sandwiching the casing by the casing placing machine, and placing the casing; and a middle moat step for hollowing the inside of the casing. That.

  According to the casing driving machine of the invention according to claim 1, since the casing is clamped from the side by the chuck portion, it can be clamped at any position in the height direction of the casing. As a result, the holding position can be changed according to the situation of the casing landfilling operation such as the height of the casing to be landfilled and the ground condition, and the casing is stabilized, so that the landfilling operation is facilitated.

  According to the casing driving machine of the invention according to claim 2, since the two curved arm portions facing each other are used, the casing to be reclaimed can be securely sandwiched from the side.

  According to the casing landfill method of the invention according to claim 3, the casing landing work is facilitated because the casing driving machine that sandwiches the casing from the side by the chuck portion is used.

  According to the casing landfill method of the invention according to claim 4, the casing landing operation is performed because the casing is sandwiched from the side by the chuck portion and the casing driving machine having two curved arm portions opposed to the chuck portion is used. Becomes even easier.

It is a schematic side view of the conventional casing driving machine. It is a schematic perspective view of the casing placement machine concerning this embodiment. It is a schematic side view of the casing driving machine according to the present embodiment. It is a schematic structure figure of the vibration generator of the casing placement machine concerning this embodiment. It is a schematic plan view of the chuck | zipper part of the casing driving machine which concerns on this embodiment. It is a schematic plan view of the other example of the chuck | zipper part of the casing driving machine which concerns on this embodiment. It is a schematic plan view of the other example of the chuck | zipper part of the casing driving machine which concerns on this embodiment. It is a schematic perspective view of the other example of the casing driving machine which concerns on this embodiment. It is a schematic process drawing of the casing landfill method using the casing driving machine concerning this embodiment.

Hereinafter, a preferred embodiment of a casing driving machine according to the present invention will be described with reference to the drawings. A schematic perspective view of a casing driving machine according to the present embodiment is shown in FIG. 2, and a schematic side view is shown in FIG.
The casing driving machine includes a vibration generator 1, a chuck portion 2 that holds a casing C to be buried (see FIG. 9) from the side of the casing C, and the vibration generator 1. The transmission unit 3 includes a hole 31 through which the casing C is inserted in the vertical direction.
Examples of the casing C include steel pipe piles and steel pipe sheet piles.
The transmission unit 3 has a hole 31 in the center, and a pair of vibration generators 1 are placed on both sides of the hole 31.
Each of the pair of vibration generating devices 1 has an eccentric weight rotor 11 as shown in FIG. 4, and the rotors 11 are rotated reversely by a hydraulic motor M or the like. By the reverse rotation of the pair of rotors 11, the centrifugal force in the horizontal direction is canceled out, and only the vibration force in the vertical direction is generated at the same cycle as the rotation speed.

A chuck unit 2 is connected below the transmission unit 3, and vibrations of the vibration generator 1 are transmitted to the chuck unit 2 via the transmission unit 3.
FIG. 5 shows a schematic plan view of the chuck portion 2. The chuck part 2 includes two curved arm parts 21a and 21b facing each other, a shaft support part 22 that pivotally supports one end of each of the two arm parts 21a and 21b, and each of the two arm parts 21a and 21b. The other ends are connected to each other, and an expansion / contraction part 23 that opens and closes the two arm parts is provided. The two arm portions 21a and 21b may be collectively referred to as the arm portion 21.
A part of the upper surface of one arm portion 21a (the portion indicated by a halftone dot in FIG. 5) of the two arm portions 21a and 21b is joined to the lower surface of the transmission portion 3 by welding, whereby the chuck The part 2 is fixed to the transmission part 3.
The expansion / contraction part 23 is a hydraulic cylinder, for example, and the arm part 21b is opened and closed by the expansion / contraction of the expansion / contraction part 23. The casing C is clamped from the side by the closing operation of the arm portion 21b.

Since the transmission part 3 has the hole 31 in the center, the inside of the casing C can be dug while the casing driving machine holds the casing C. Accordingly, it is not necessary to remove the casing casting machine from the casing C every time the casting by the casing driving machine and the intermediate moat by a grab hammer or the like are repeated.
Moreover, since the casing C is clamped from the side by the chuck portion 2, it can be clamped at any position in the height direction of the casing C. As a result, the holding position can be changed according to the situation of the casing landfill work such as the height of the casing to be landfilled and the ground condition, and the casing is stabilized, so that the landfill work of the casing is facilitated.

In addition, the shape of the arm part 21 is not limited to the shape of FIG. For example, when the casing C is a steel pipe sheet pile and has a joint around it, as shown in FIG. 6, the relief part 24 may be formed so that the arm part 21a of the chuck part 2a does not contact the joint. .
Further, the shaft support portion 22 may have a structure in which the two arm portions 21a and 21b are supported by a single shaft as shown in FIG. 5, or, for example, as shown in FIG. The arm portions 21a and 21b may be individually supported by two shafts.
In the example of FIG. 5, the chuck portion 2 is composed of one set of arm portions, but may be composed of a sub-number of arm portions.
FIG. 8 shows an example of two sets of arm portions. Another set of arm portions 21c and 21d is provided below the set of arm portions 21a and 21b. The arm portion 21c is connected to the lower surface of the arm portion 21a by welding, screwing, or the like. The arm portions 21c and 21d are opened and closed by the shaft support portion and the extendable portion 23a.
Thus, since the load which pinches | interposes the casing C can be enlarged by making an arm part into several sets, there is little possibility that a casing placement machine will remove | deviate from the casing C, and the vibration of the vibration generator 1 is reduced to the casing C. Can be transmitted sufficiently.

Next, a method for landfilling the casing C will be described with reference to FIGS. 9 (a) and 9 (b). 9A and 9B, the lower part of the casing C is a partial cross-sectional view.
(1) The casing driving machine attached to the casing C is suspended by a crane, and the casing C is set up in a landfill position. The suspension is performed by suspending a suspension fitting attached to the top of the vibration generator 1 with a crane (see FIG. 9A). <Case installation process>
The casing driving machine holds the casing C from the side by the chuck portion 2. The position for sandwiching the casing C may be any position in the height direction of the casing C, and may be performed at a height suitable for the construction situation.
The casing C is provided with a receiving cover U for protecting the upper end surface and making the grab hammer G easy to receive.
(2) The vibration generator 1 is vibrated and the casing C is driven. <Placement process>
At this time, the load applied from the casing C to the ground is adjusted by the crane.
(3) When the reclamation by the casing driving machine does not proceed any more, the vibration of the vibration generator 1 is stopped, and the hanging bracket that suspends the casing driving machine is removed from the crane. <Hanging bracket release process>
In FIG. 9B, the hanging bracket is removed from the vibration generator 1, but the hanging bracket may be left attached to the vibration generator 1.
(4) The grab hammer G is suspended from the crane, and the earth, sand, rolling stones, cobblestones, etc. in the casing C are removed by the grab hammer G (see FIG. 9B). <Nakabori process>
At this time, if the ground is hard and cannot be dug by the grab hammer G, the ground rock or the like is crushed by the down-the-hole hammer or the like and then dug by the grab hammer G.
(5) When Nakabori is finished with the grab hammer G, the grab hammer G is removed, and the casing is driven by a casing driving machine. <Placement process>
In this manner, the casing C is reclaimed by repeating the placing process of placing by the casing placing machine and the intermediate moat process of performing the intermediate moat by the grab hammer G.
Since the casing driving machine according to the present embodiment is used, casing landfill work is facilitated.
In addition, you may perform a casting process and a Nakabori process simultaneously by suspending a casing driving machine and a grab hammer separately.

  The present invention is suitably used, for example, for reclamation of steel pipe piles in hard rock.

DESCRIPTION OF SYMBOLS 1 Exciter 11 Rotor 2, 2a Chuck part 21, 21a, 21b, 21c, 21d Arm part 22 Shaft support part 23, 23a Extendable part 24 Escape part 3 Transmission part 31 Hole part C Casing G Grab hammer M Hydraulic motor U Receiving port cover

Claims (2)

A vibration generator,
A chuck portion for sandwiching a casing to be reclaimed from the side of the casing;
A transmission unit that is mounted with the vibration generator and transmits vibrations of the vibration generator to the chuck portion;
The transmission section may have a hole for inserting the casing in the vertical direction,
The chuck portion includes a plurality of opposing two curved arm portions ,
A shaft support portion that pivotally supports one end of each of the two arm portions;
A casing driving machine comprising: a telescopic part that connects the other ends of the two arm parts and opens and closes the two arm parts. A method for reclaiming a casing using the casing driving machine according to claim 1 ,
A placing step of sandwiching the casing by the casing placing machine and placing the casing;
A casing reclamation method comprising: simultaneously performing a digging step for digging the inside of the casing and the placing step .

Images