JP5823715B2 - Pile inner surface support device and punching method - Google Patents

Description

  The present invention relates to an inner surface support device for a pile such as a steel pipe pile, and a method for punching a pile using the inner surface support device.

As a device used for placing a steel pipe pile, a pile press-in device that takes a reaction force from an existing steel pipe pile and press-fits the steel pipe pile into the ground is known.
This pile press-in device is equipped with a clamp that grips a steel pipe pile that has already been driven in, and a chuck device that holds and supports the steel pipe pile that is pressed into the ground. In this state, the steel pipe pile can be press-fitted into the ground without noise and vibration by lowering the chuck device in a state of gripping the steel pipe pile to be press-fitted.

For example, the chuck device proposed in Patent Document 1 includes a hydraulic cylinder that is arranged on the circumference of a steel pipe pile and presses the steel pipe pile, and a chuck portion that is provided in the hydraulic cylinder and grips the steel pipe pile. A method of gripping a steel pipe pile by applying a pressing force (gripping force) to the outer surface of the steel pipe pile is employed.
Further, Patent Document 2 proposes a technique in which the area of the chuck portion is enlarged to alleviate the concentrated load on the steel pipe pile.

JP 2003-138563 A JP 2004-183306 A

However, in any technique of Patent Documents 1 and 2, when the pile material is thin, the pile material may be deformed by a gripping force acting on the outer surface.
Further, when the pile material has a large diameter, it is necessary to densely arrange the hydraulic cylinders around the pile material so that the concentrated load does not act, which makes the control of the hydraulic pressure complicated and uneconomical.

  An object of the present invention is to make it easy to punch even a thin steel pipe having a large diameter.

In order to solve the above problems, the invention described in claim 1
An outer surface gripping device that grips the pile, a ring-shaped gripping portion that houses the outer surface gripping device, a driving portion that includes a plurality of driving devices and rotatably supports the gripping portion that is built in, and a pile that is press-fit A steel sheet pile wall arranged concentrically with the pile around the pile, and a static load type pile press-fitting and pulling machine that holds the head of the steel sheet pile wall by a fixing means,
In a pile punching device in which a plurality of locking members protruding from the outer periphery of the drive unit are connected to a locking member protruding from the front end of the pile press-fitting and drawing machine ,
A contact member in contact with the inner surface of the pile;
And a pressing means for pressing the abutting member against the inner surface of the pile.

  Invention of Claim 2 is an inner surface support apparatus of the pile of Claim 1, Comprising: The said contact member and the press means are equipped with the base by which multiple sets are attached radially.

  Invention of Claim 3 is an inner surface support apparatus of the pile of Claim 2, Comprising: The hanging tool attached to the said base is provided, It is characterized by the above-mentioned.

The invention according to claim 4
An outer surface gripping device that grips the pile, a ring-shaped gripping portion that houses the outer surface gripping device, a driving portion that includes a plurality of driving devices and rotatably supports the gripping portion that is built in, and a pile that is press-fit A steel sheet pile wall arranged concentrically with the pile around the pile, and a static load type pile press-fitting and pulling machine that holds the head of the steel sheet pile wall by a fixing means,
Using a pile punching device in which a plurality of locking members protruding on the outer periphery of the drive unit is connected to a locking member protruding at the front end of the pile press-fitting and drawing machine ,
In the pile punching method in which the pile is reciprocated in the vertical direction by synchronously driving the pile press-fitting and drawing machine while rotating the pile by synchronously driving the drive device,
Using the pile inner surface support device according to any one of claims 1 to 3,
The method is characterized in that the pile is punched by pressing the contact member against the inner surface of the pile in correspondence with the gripping force acting point of the outer surface gripping device that contacts the outer surface of the pile and grips the pile.

  A fifth aspect of the present invention is the pile punching method according to the fourth aspect, wherein the inner surface supporting device is moved in conjunction with the movement of the outer surface gripping device.

  According to the present invention, since deformation is suppressed when gripping the pile material, it is possible to easily punch out particularly thin steel pipes having a large diameter.

It is a top view which shows the arrangement configuration of one Embodiment of the pile punching apparatus to which this invention is applied. It is a center longitudinal cross-sectional view of the pile punching apparatus of FIG. It is a center longitudinal cross-sectional view of the pile punching apparatus of Embodiment 2.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
FIG. 1 shows an arrangement of an embodiment of a pile punching device to which the present invention is applied. 1 is a steel pipe pile, 2 is a gripping portion, 3 is an outer surface gripping device, 4 is a driving portion, 5 is a driving device, 6 Is a locking member, 7 is a reaction force device, 8 is a locking member, 9 is a fixing means, 10 is a reaction force base, and 11 is an inner surface support device.

  As shown in the drawing, the outer peripheral surface of the steel pipe pile 1 is gripped by the outer surface gripping device 3 inside the ring-shaped gripping portion 2. The outer surface gripping device 3 is constituted by a steel pipe chuck device, for example, and in the illustrated example, eight outer surface gripping devices 3 are arranged at equal intervals along the inner side of the ring-shaped gripping portion 2.

The outer periphery of the grip portion 2 is rotatably supported inside the drive portion 4. The grip portion 2 is rotationally driven by a plurality (four in the illustrated example) of drive devices 5 provided at equal intervals in a concentric manner with the drive portion 4.
The drive device 5 is configured, for example, by engaging a pinion with a ring gear fixed to the outer periphery of the grip portion 2.

  In addition, a locking member 8 provided at the front end of the reaction force device 7 is coupled to the locking member 6 provided on the outer periphery of the drive unit 4. The locking member 6 is composed of a plurality of (four in the illustrated example) brackets or the like that are provided on the outer periphery of the drive unit 4 at regular intervals.

  The reaction force device 7 is an existing hydraulic pile press-fitting / extracting machine such as Silent Piler (registered trademark), for example, and may be arranged in a required number, and three or more units are preferable statically. The locking member 8 may be a chuck portion protruding from the front end of the reaction force device 7 or a pin.

The reaction force device 7 is fixed on the reaction force base 10 by the fixing means 9.
That is, reaction force bases 10 are constructed in advance around a planned placement position of the steel pipe pile 1 at a plurality of concentric and substantially equidistant positions (four places in the illustrated example) located outside the drive unit 4. .

Here, the reaction force base 10 is composed of, for example, a steel sheet pile, and is previously placed on the ground with a hydraulic pile press-fitting and drawing machine or a vibro hammer. In the example of illustration, the reaction force base 10 by a steel sheet pile is previously arrange | positioned along the outer periphery of the steel pipe pile 1, ie, the outer side of the ring-shaped drive part 4. FIG.
The fixing means 9 is constituted by a clamping device provided under the hydraulic pile press-fitting and drawing machine constituting the reaction force device 7.

As shown in FIG. 2, the inner surface support device 11 is directly connected to the abutting members 12 respectively in contact with the inner peripheral surface of the steel pipe pile 1 corresponding to the gripping force action point of the outer surface gripping device 3. The pressing member 13 is provided with a hydraulic jack or a pneumatic jack that presses the abutting member 12 against the outer surface gripping device 3 against the inner surface of the steel pipe pile 1.
A plurality of sets (eight sets in the illustrated example) of the abutting member 12 and the pressing means 13 are attached to the pedestal 14 by the ring member at radial equal intervals in the portion of the pressing means 13 corresponding to the position of the outer surface gripping device 3. ing.
A plurality of lifting tools 15 that can be lifted by a crane (not shown) or the like are mounted on the pedestal 14.

The steel pipe pile 1 is driven by rotating the steel pipe pile 1 via the gripping portion 2 (outer surface gripping device 3) by synchronous driving of the driving device 5 of the driving portion 4 and by synchronous driving of the four reaction force devices 7. The steel pipe pile 1 is press-fitted into the ground by reciprocating the steel pipe pile 1 in the axial direction via the locking members 8 and 6 and the drive unit 4.
At this time, the reaction force in the rotational direction and the reaction force in the axial direction of the steel pipe pile 1 are received by the reaction force base 10 via the four reaction force devices 7.

  At the same time, in the steel pipe pile 1, the abutting member 12 is moved to the inner surface of the steel pipe pile 1 in accordance with the positions of the eight outer surface gripping devices 3 by the synchronous drive (extension operation) of the pressing means 13 of the inner surface support device 11. Press each one.

Here, when the outer surface gripping device 3 is opened and the grip portion 2 is moved, the inner surface support device 11 is suspended by a crane or the like with the lifting tool 15 on the base 14 and the pressing means 13 is opened (reduction operation). And move according to the grip portion 2.
The ring-shaped base 14 may be further reinforced with a beam or the like.

As described above, since the reaction force base 10 placed in a direction perpendicular to the radial direction of the steel pipe pile 1 exhibits a large pulling resistance and rotational resistance, the large diameter steel pipe pile 1 can be press-fitted with a static load. , Noise and vibration can be suppressed.
Moreover, the construction of the reaction force base 10 that is driven in a direction perpendicular to the radial direction of the steel pipe pile 1 is easy, and it is not necessary to prepare another machine separately.
And it can respond easily also to the large diameter pipe in the manufacturable range.
Moreover, it can easily counter the reaction force of both left and right rotations.
Furthermore, since the reaction force base 10 has only to be placed, space saving can be achieved.

In particular, when the steel pipe pile 1 is rotationally press-fitted, the abutting member 12 of the inner surface support device 11 is pressed against the inner surface of the steel pipe pile 1 in correspondence with the position of the outer surface gripping device 3, thereby holding the steel pipe pile 1 from the inner and outer surfaces. Therefore, deformation can be suppressed and gripping can be performed reliably.
Therefore, since a strong gripping force can be transmitted to the steel pipe pile 1, it is not necessary to arrange the outer surface gripping device 3 around the pile material and it is economical.

  Further, when the outer surface gripping device 3 is opened and the grip portion 2 is moved, the inner surface support device 11 is hung by the crane 15 or the like with the lifting tool 15 on the pedestal 14, and the pressing means 13 is opened (reduction operation). Accordingly, the gripping force of the outer surface gripping device 3 that moves with the press-fitting can be reliably supported from the inner surface.

  In addition, although the press injection of the pile was demonstrated in the above embodiment, it is applicable also to extraction of the existing placing pile.

As described above, according to the embodiment, it is possible to easily perform the rotary punching construction with a static load by an apparatus in which the large-diameter steel pipe pile 1 is saved in space, and therefore, it is possible to suppress the construction period and the construction cost.
Therefore, the scope of application can be expected to expand to the foundation construction of landslide prevention piles and skyscrapers.

  Further, by arranging the four reaction force bases 10 along the outer periphery of the steel pipe pile 1, further space saving can be achieved.

Moreover, since the abutting member 12 of the inner surface support device 11 is pressed against the inner surface of the steel pipe pile 1 corresponding to the position of the outer surface gripping device 3, the deformation can be suppressed when gripping the pile material.
Therefore, it is possible to easily punch out particularly thin steel pipes having a large diameter.

(Embodiment 2)
FIG. 3 shows a pile punching device according to the second embodiment. As in the first embodiment, 1 is a steel pipe pile, 2 is a gripping portion, 3 is an outer surface gripping device, 21 is an inner surface support device, and 22 is The abutting member, 23 is a pressing means, 24 is a lower pedestal, 25 is an upper pedestal, 26 is a lower link, 27 is an upper link, and 28 is a hanger.

As shown in the drawing, the inner surface support device 21 is similar to the above-described first embodiment, corresponding to the gripping force action point of the outer surface gripping device 3, and the contact members 22 respectively contacting the inner peripheral surface of the steel pipe pile 1 and its contact. There is provided a pressing means 23 using a hydraulic jack or a pneumatic jack that presses the member 22 against the outer surface gripping device 3 against the inner surface of the steel pipe pile 1.
A plurality of sets of these abutting members 22 and pressing means 23 correspond to the position of the outer surface gripping device 3 in a radially equidistant manner with respect to the lower pedestal 24 and the upper pedestal 25 made of a polygonal or circular plate (eight sets in the illustrated example). ) Is installed.

Specifically, the pressing means 23 is vertically arranged between the lower pedestal 24 and the upper pedestal 25, the lower link 26 is installed obliquely between the abutting member 22 and the lower pedestal 24, and the abutting member 22 An upper link 27 is installed obliquely between the upper pedestal 25 and the upper pedestal 25.
A plurality of lifting tools 28 that can be lifted by a crane (not shown) are attached on the upper base 14.

  Simultaneously with the gripping of the steel pipe pile 1 by the outer surface gripping device 3, the inner side of the steel pipe pile 1 is driven outwardly from the lower pedestal 24 and the upper pedestal 25 by the synchronous drive (reduction operation) of the pressing means 23 of the inner surface support device 21. The contact member 22 is pressed against the inner surface of the steel pipe pile 1 through the extended lower link 26 and the upper link 27 in correspondence with the positions of the eight outer surface gripping devices 3.

Here, when the outer surface gripping device 3 is opened and the grip portion 2 is moved, the inner surface support device 21 is hung by a crane or the like with a lifting tool 28 on the upper base 25, and the pressing means 23 is opened (extension operation). Then, it is moved according to the grip portion 2.
Note that the lower pedestal 24 and the upper pedestal 25 made of a polygonal or circular plate material may be further reinforced with beams or the like.

  As described above, the inner surface support device 21 according to the second embodiment can exhibit the same functions and effects as those of the first embodiment.

(Modification)
In the above embodiment, reaction force bases are provided at a plurality of locations around the steel pipe pile, but the present invention is not limited to this, and is a reaction force base provided in a cylindrical shape around the steel pipe pile. May be.
And in the example of illustration, although the reaction force base | substrate was arrange | positioned along the outer periphery of a steel pipe pile, you may arrange | position a reaction force base | substrate along a perpendicular direction with respect to the radial direction of a steel pipe pile.
Moreover, although it was set as the steel pipe pile in embodiment, this invention is not limited to this, Besides, the pile of PC / RC pile and combination piles (a sheet pile, a steel pipe, etc.) may be sufficient.
Furthermore, the configuration of the outer surface gripping device, the inner surface support device, the abutting member, the pressing means, the pedestal, and the hanging tool is arbitrary, and it is needless to say that the specific detailed structure can be appropriately changed.

DESCRIPTION OF SYMBOLS 1 Pile 2 Grasp part 3 Outer surface gripping device 4 Drive part 5 Drive device 6 Locking member 7 Reaction force device 8 Locking member 9 Fixing means 10 Reaction force base 11 Inner surface support device 12 Contacting member 13 Pressing means 14 Base 15 Lifting tool 21 Inner surface support device 22 Abutting member 23 Press means 24 Lower base 25 Upper base 26 Lower link 27 Upper link 28 Suspension tool

Claims (5)

An outer surface gripping device that grips the pile, a ring-shaped gripping portion that houses the outer surface gripping device, a driving portion that includes a plurality of driving devices and rotatably supports the gripping portion that is built in, and a pile that is press-fit A steel sheet pile wall arranged concentrically with the pile around the pile, and a static load type pile press-fitting and pulling machine that holds the head of the steel sheet pile wall by a fixing means,
In a pile punching device in which a plurality of locking members protruding from the outer periphery of the drive unit are connected to a locking member protruding from the front end of the pile press-fitting and drawing machine ,
A contact member in contact with the inner surface of the pile;
And a pressing means for pressing the abutting member against the inner surface of the pile.   The pile inner surface support device according to claim 1, further comprising a pedestal on which a plurality of sets of the abutting members and the pressing means are radially attached.   The pile inner surface support device according to claim 2, further comprising a hanging tool attached to the pedestal. An outer surface gripping device that grips the pile, a ring-shaped gripping portion that houses the outer surface gripping device, a driving portion that includes a plurality of driving devices and rotatably supports the gripping portion that is built in, and a pile that is press-fit A steel sheet pile wall arranged concentrically with the pile around the pile, and a static load type pile press-fitting and pulling machine that holds the head of the steel sheet pile wall by a fixing means,
Using a pile punching device in which a plurality of locking members protruding on the outer periphery of the drive unit is connected to a locking member protruding at the front end of the pile press-fitting and drawing machine ,
In the pile punching method in which the pile is reciprocated in the vertical direction by synchronously driving the pile press-fitting and drawing machine while rotating the pile by synchronously driving the drive device,
Using the pile inner surface support device according to any one of claims 1 to 3,
A pile punching method, wherein the pile is punched by pressing the abutting member against the inner surface of the pile in correspondence with the gripping force acting point of the outer surface gripping device that contacts the outer surface of the pile and grips the pile. .   The pile punching method according to claim 4, wherein the inner surface support device is moved in conjunction with the movement of the outer surface gripping device.

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