JP2006125032A - Pile construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pile construction machine capable of performing pile driving operation or pile extracting operation by moving on a frame without disposing large lifting equipment on the side of the frame even if the strength of the frame constructed on the ground is low. <P>SOLUTION: This pile construction machine 10 placed on the temporarily installed frame 1 constructed on the ground comprises the base frame 20 moving on the temporarily installed frame 1 and a leader 40 to which an earth auger 30 (drilling means) drilling the ground is fitted. The leader 40 is vertically installed on a base frame in a rotatable state around its axis, and the earth auger 30 fitted to the leader 40 is moved around the axis of the leader 40 following the rotation of the leader 40. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pile construction machine for driving a pile into the ground or pulling a pile from the ground from a gantry constructed on the ground.

  In pile driving work to drive piles on slopes such as mountains and rivers, and pile removal work to pull out piles from slopes (hereinafter sometimes referred to as “pile construction”), a temporary platform combined with iron pipes is used as a slope. The pile construction machine is placed on the plane on the temporary mount and the work is performed. However, since the strength of the temporary mount constructed by combining iron pipes is low, the weight of the pile construction machine is limited.

Therefore, as a pile construction machine that performs pile driving work from the temporary mount, as shown in FIG. 6, a flat base frame 120, an earth auger 130 for excavating the ground from the inside of the hollow pile P ′, and an earth auger There is a pile construction machine 100 provided with a reader 140 that guides the lifting and lowering of 130. In this pile construction machine 100, a lifting tool 150 of a rough terrain crane (not shown) is attached to the top of the leader 140, the entire pile construction machine 100 is lifted by the rough terrain crane, and the pile construction machine 100 is transferred on the temporary mount 1. Thus, a plurality of hollow piles P ′ can be driven sequentially from the temporary mount 1 (see, for example, Patent Document 1).
In such a pile construction machine 100, it is not necessary to place a large lifting machine such as a rough terrain crane on the temporary frame 1, and the load supported by the temporary frame 1 is greatly reduced. Even if it is 1, the pile construction machine 100 can be mounted.
JP 2001-248375 A (paragraph 0010, FIG. 1)

In the pile construction machine 100, since the entire pile construction machine 100 is lifted and moved by the rough terrain crane arranged beside the temporary mount 1, a wide road that leads from the slope to the temporary mount 1 is constructed. It is necessary to arrange a rough terrain crane on the side of the temporary mount 1 using the road.
However, in the construction of mountains, rivers, etc., it is necessary to give sufficient consideration to the environment around the construction site, and it is necessary to avoid providing a wide road around the construction site. As described above, when the rough terrain crane cannot be arranged on the side of the temporary mount 1, the pile construction machine 100 cannot be moved on the temporary mount 1. There is a problem that is limited.

  Therefore, in the present invention, even if the strength of the gantry constructed on the ground is low, the above-mentioned problems are solved, and the pile driving by moving on the gantry without placing a large lifting machine beside the gantry. It is an object to provide a pile construction machine capable of performing work or pile removal work.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a pile construction machine placed on a gantry constructed on the ground, and a base frame that moves on the gantry, and a hole for excavating the ground Or a reader to which pressure applying means for applying pressure input or tensile force to the pile is attached, and the leader is erected on the base frame so as to be rotatable around an axis, and is attached to the leader. The drilling means or pressure applying means is configured to move around the leader axis as the leader rotates.

  Here, the drilling means is a device such as an earth auger that drills a hole for inserting a pile, and the pressing means is a pressure input for press-fitting the pile into the ground, or the pile is grounded It is a device such as a hydraulic jack that applies a tensile force for pulling out from the pile, and the existing drilling device or the pile removing device can be used as these drilling means and pressure applying means.

  In addition, as a configuration for moving the base frame on the gantry, a configuration in which a plurality of wheels are provided between the base frame and the gantry, a configuration in which a plurality of round pipes (rollers) are provided between the base frame and the gantry, or The structure of the base frame is not limited, such as moving the base frame on the rails laid on the frame, but by providing multiple fulcrums between the base frame and the frame, the load on the pile construction machine can be reduced. It is preferable to disperse and act on the gantry.

  Thus, in the pile construction machine of the present invention, since the base frame provided with the leader to which the drilling means or the pressing means is attached can be moved on the gantry, when the pile construction machine is moved, No need to use a lifting machine. Thereby, a pile construction machine can be moved on a mount, and a pile driving work or a pile removal work can be performed, without arrange | positioning a large lifting machine beside a mount.

Here, if the lift for loading and unloading each part of the pile construction machine and the pile is provided at the center in the extension direction of the mount, when the pile construction is completed, It is necessary to stop and dismantle at the center of the.
Therefore, when performing the pile driving work from above the gantry, first, after moving the pile construction machine to one end of the gantry, the pile driving work is sequentially performed while moving from one end of the gantry to the center. Then, after moving the pile construction machine from the center of the gantry to the other end of the gantry, the pile construction machine is moved to the center of the gantry from the other end of the gantry to perform the pile driving work in sequence. Can be stopped.
At this time, when the top of the pile protrudes from the top surface of the gantry, the pile construction machine cannot pass above the pile, so it is necessary to always move while performing the pile driving work on the rear side in the traveling direction. There is.
Therefore, when the traveling direction of the pile driving work by the pile construction machine is reversed, the drilling means must also be moved to the opposite side. At this time, in order to reverse the entire pile construction machine, it is necessary to secure a sufficient space on the gantry, and there is a problem that the cost for constructing the gantry increases.
Moreover, in order to avoid the interference between the pile construction machine and the top of the pile, it is necessary to always perform the pile removal work on the front side in the traveling direction. When the working direction is reversed, it is necessary to move the pressure applying means to the opposite side.

  In the pile construction machine of the present invention, the leader can be rotated around the axis, and the drilling means or the pressing means attached to the leader is configured to move around the axis of the leader. When the traveling direction of pile construction by the machine is reversed, the position of the drilling means or the pressing means can be adjusted by rotating the leader. Thereby, it is not necessary to reverse the entire pile construction machine on the gantry, and it is not necessary to greatly expand the width of the gantry than the width of the base frame, so that the cost for constructing the gantry can be reduced.

  In addition, since the drilling means can be moved around the axis of the leader, in the configuration in which the upper end of the auger screw is attached to the lower end of the drive unit of the drilling means, when adding the auger screw, By rotating the leader, the drive unit can be moved from above the auger screw, and another auger screw can be lowered from the vertical direction and added. And the upper end part of an auger screw can be attached to the lower end part of a drive part by rotating a leader again and moving a drive part above an auger screw again. Thereby, it is not necessary to incline the auger screw obliquely and insert it below the drive unit from the lateral direction, and work efficiency can be improved.

  Furthermore, when driving the pile into the ground or pulling it out from the ground, by rotating the leader, it is possible to move the part protruding from the leader above the pile placement position. Can be driven out or pulled out, and work efficiency can be improved.

  The invention according to claim 2 is the pile construction machine according to claim 1, wherein the base frame is provided with an outrigger having a leg portion that can be raised and lowered, and the leg portion of the outrigger is lowered. The base frame is configured to be supported by the outrigger by being brought into contact with the ground.

  Thus, in the pile construction machine of the present invention, when performing pile construction, even if the weight of the pile, excavation resistance, or stress due to frictional resistance between the pile and the ground acts on the base frame, Since it is supported by the outrigger, it is possible to prevent the load supported by the gantry from increasing. Thereby, in order to support the stress at the time of pile construction, it becomes unnecessary to raise the intensity | strength of a mount frame, Therefore The cost for constructing a mount frame can be reduced.

  The invention according to claim 3 is the pile construction machine according to claim 1 or 2, wherein the base frame is provided with lifting means.

  Thus, in the pile construction machine of the present invention, the lifting means is provided in the base frame, and by using this lifting means, each part and pile of the pile construction machine can be carried in or out, Assembly work of pile construction machines and work efficiency of pile construction can be improved.

According to such a pile construction machine, it is possible to move the base frame provided with the leader to which the drilling means or the pressure means is attached on the gantry, so the pile construction machine is moved using a large lifting machine. There is no need to let them. As a result, it is possible to move the pile construction machine on the gantry and perform pile driving work or piling work without placing a large lifting machine beside the gantry. There is no need to provide it, and work can be done with due consideration for the environment around the construction site.
In addition, since the drilling means or pressure means are configured to move around the leader axis, when the direction of pile construction by the pile construction machine is reversed, the entire pile construction machine is reversed on the gantry. The position of the hole drilling means or the pressure applying means can be adjusted by rotating the leader without making it. As a result, it is not necessary to greatly expand the width of the gantry than the width of the base frame, so that the cost for constructing the gantry can be reduced.
Furthermore, by rotating the leader, it is possible to move the part protruding in the horizontal direction from the leader, and it is possible to add the auger screw, drive the pile, or pull out the pile from the vertical direction. The work efficiency of pile construction can be increased.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
FIG. 1 is a side view showing the pile construction machine of the present embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a plan view showing the pile construction machine of the present embodiment. FIG. 4 is a view showing the pile construction machine of the present embodiment, and is a side view showing a state in which the legs of the outrigger are separated from the ground.
In the following description, the front corresponds to the right side of FIG. 1, and the rear corresponds to the left side of FIG. Moreover, the left-right direction corresponds to the left-right direction in FIG. 2, and the width is the width in the left-right direction in FIG.
In this embodiment, a pile construction machine that drives a H-shaped steel pile into the ground from the plane of a temporary mount constructed by combining iron pipes on a mountain slope will be described as an example.

(Pile construction machine configuration)
As shown in FIGS. 1 and 2, the pile construction machine 10 guides the base frame 20 that moves on the temporary mount 1, the earth auger 30 that is a drilling means for excavating the ground, and the elevation of the earth auger 30. A leader 40 and a crane 50 as a lifting means are provided.

  As shown in FIGS. 1 to 3, the base frame 20 is a flat plate-like member that is H-shaped in plan view, and two main frames 21 and 21 arranged at a predetermined interval in the left-right direction; The main frame 21 and the sub-frame 22 are connected to each other at the center in the extending direction, and the width of the entire base frame 20 is formed substantially the same as the width of the temporary mount 1.

At the four corners of the base frame 20, there are four outriggers 23 provided with leg portions 24 that can be raised and lowered. The leg portions 24 of the respective outriggers 23 are lowered, and the lower end portions thereof. Are brought into contact with the ground, so that the base frame 20 is supported by the outriggers 23.
In addition, when moving the pile construction machine 10 on the temporary installation base 1, as shown in FIG. 4, the leg part 24 of each outrigger 23 ... is raised, and the lower end part of the leg part 24 is set to the temporary installation base 1. By disposing above the upper surface, interference between the leg portion 24 and the temporary mount 1 can be prevented.
In addition, as a structure which raises / lowers the leg part 24 of the outrigger 23, for example, an operator raises / lowers the leg part 24 using a chain block, and a horizontal pin is inserted and fixed to the leg part 24, or a hydraulic jack is used. The configuration is not limited, such as a configuration in which the legs 24 are moved up and down.

Further, a plurality of wheels 25 are provided on the lower surface of the left and right end portions of the base frame 20, and the base frame 20 can move on the temporary mount 1 by the wheels 25. Yes. Thus, the base frame 20 is mounted on the temporary mount 1 with the plurality of wheels 25 as fulcrums, and the load of the pile construction machine 10 is dispersed and acts on the temporary mount 1. Therefore, the pile construction machine 10 can be supported even with the temporary mount 1 having low strength against concentrated loads.
In addition, as a drive means for the pile construction machine 10 to move on the temporary mount 1, for example, an existing drive means such as a configuration in which the wheel 25 is rotated by an electric motor is used.

As shown in FIGS. 1 to 3, the leader 40 is a column that guides the raising and lowering of the earth auger 30, and has a configuration in which round pipes are attached to four corners of a box-shaped steel pipe. The reader 40 is erected on the substantially central portion of the sub-frame 22 of the base frame 20, and is erected on the base frame 20 so as to be rotatable around an axis by a rotary pedestal 43 provided at the lower end. Has been.
In addition, as a structure which rotates the rotation base 43, the structure is not limited, for example, the structure which an operator rotates manually, the structure rotated using an electric motor or a hydraulic mechanism, etc.

As shown in FIGS. 1 and 2, the earth auger 30 is attached to the reader 40 on the opposite side of the auger output device 31 and the auger output device 31 that can be moved up and down along the leader 40. A winch 33 for winding and unwinding the lifting wire 32 attached to the auger output device 31 through the two sheaves 44, 44 provided, and an auger screw to which a rotational force is applied from the auger output device 31 34, and a steady rest 35 that prevents the auger screw 34 from swinging during excavation, and the winch 33 winds or feeds the lifting wire 32, so that the auger output device 31 is provided. Is configured to move up and down along the reader 40.
Then, by lowering the auger screw 34 rotated by the rotational force of the auger output device 31 along the leader 40, a hole for inserting a pile can be drilled.
In addition, as a drive means of the auger output apparatus 31, the existing drive means, such as the structure using a hydraulic motor, is used, for example.

  As shown in FIG. 3, since the reader 40 is erected on the base frame 20 so as to be rotatable around the axis, the earth auger 30 attached to the reader 40 is used to rotate the reader 40. Accordingly, it moves around the axis of the reader 40. In FIG. 3, the earth auger 30 is shown in a simplified manner in order to clearly show the rotation state of the earth auger 30.

As shown in FIGS. 1 to 3, the crane 50 is used when assembling or disassembling the earth auger 30 and is a lifting means for inserting a pile into a borehole excavated in the ground.
The crane 50 is erected on the rear portion of the main frame 21 disposed on the lower side of FIG. 3, and has a swivel base 51 rotatable around an axis, an arm 52 erected on the swivel base 51, A suspension member 53 suspended from the upper end portion of the arm 52 is provided. The upper end portion of the arm 52 expands and contracts, and the arm 52 can be bent in the vertical direction at a substantially central portion in the vertical direction.

(Pile driving work using a pile construction machine)
Next, a pile driving operation using the pile construction machine 10 of the present embodiment will be described.
FIG. 5 is a diagram illustrating a pile driving operation using the pile construction machine of the present embodiment, in which (a) is a plan view of a mode in which the pile construction machine is moved from the front end portion of the temporary mount toward the center portion; (B) is a top view of the mode which moved the pile construction machine from the center part of the temporary mount to the rear end part, (c) moved the pile work machine from the rear end part of the temporary mount to the central part. (D) is a top view of the aspect which stopped the pile construction machine in the center part of the temporary mounting stand.
In addition, in this embodiment, as shown in FIG. 5, in order to carry in and carry out each component of the pile construction machine 10, and the pile P, the lift (not shown) extended from the ridge of the slope is temporarily installed. It is provided at the center C in the extending direction of the gantry 1.

  First, as shown in FIG. 1 and FIG. 2, the pile construction machine 10 is mounted on the temporary mount 1 by assembling the parts carried in by a lift (not shown) provided in the central portion C of the temporary mount 1. Place. At this time, by assembling the crane 50 on the base frame 20 in advance, the leader 40 and the earth auger 30 can be assembled using the crane 50, so that work efficiency can be improved. At this time, the earth auger 30 is disposed on the front side of the sub-frame 22 (see FIG. 3), and the lower ends of the leg portions 24 of the outriggers 23 are disposed above the upper surface of the temporary mount 1. To.

  Subsequently, as shown in FIG. 5A, the pile construction machine 10 is directed toward the front end F of the temporary mount 1 in a state where a predetermined number of piles and auger screws (not shown) are loaded on the base frame 20. The base frame 20 is supported by the outriggers 23... By lowering the leg portions 24 of the outriggers 23... (See FIG. 1). ).

Thereafter, as shown in FIGS. 1 and 2, the auger output device 31 is driven to rotate the auger screw 34, and the auger screw 34 is lowered along the leader 40, thereby drilling a hole in the ground.
Furthermore, the pile P is inserted into the borehole using the crane 50. At this time, the stress due to the weight of the pile and the excavation resistance acts on the base frame 20, but since the base frame 20 is supported by the respective outriggers 23 ..., the load supported by the temporary mount 1 increases. Is prevented.

When the auger screw 34 is added using the crane 50, the auger output device 31 is moved from above the auger screw 34 by rotating the leader 40 around the axis, so that another auger screw 34 is moved. It can be lowered from the vertical direction and added.
Further, when the pile P is inserted into the pit, the leader 40 is rotated around the axis, and the auger output device 31 is moved from above the pit so that the pile P is lowered from the vertical direction to Can be inserted into the hole.
In this way, it is not necessary to incline the auger screw 34 or the pile P obliquely and insert it below the auger output device 31 from the lateral direction, so that work efficiency can be improved.

  Then, as shown in FIG. 5 (a), the pile construction machine 10 is moved toward the central portion C of the temporary mount 1, and the pile driving work is sequentially performed in the same manner as the pile driving work. As shown to (b), the pile construction machine 10 is moved to the center part C of the temporary mount 1 to arrange a plurality of piles P in the extending direction of the temporary mount 1.

Here, in this embodiment, since the lift (not shown) for carrying in and carrying out each component of the pile construction machine 10 and the pile P is provided in the center part C of the temporary mount 1, the pile driving work Is completed, the pile construction machine 10 needs to be stopped at the center C of the temporary mount 1 and disassembled.
Therefore, after performing the pile driving operation from the front end F to the central portion C of the temporary mount 1, the pile construction machine 10 is moved from the central portion C to the rear end B of the temporary mount 1 as shown in FIG. As shown in FIG. 5 (d), the pile construction machine 10 is moved to a temporary frame when the pile driving work is completed by moving the piles and sequentially performing the pile driving work from the rear end B toward the center C. 1 can be stopped at the central portion C.

At this time, in this embodiment, since the top part of the pile P protrudes from the upper surface of the temporary mount 1, when the pile construction machine 10 is moved, the upper side of the pile P cannot be passed. Therefore, it is necessary to always arrange the earth auger 30 on the rear side in the traveling direction of the pile construction machine 10 and perform the pile driving work on the rear side in the traveling direction of the pile construction machine 10.
In the pile construction machine 10 of the present embodiment, since the earth auger 30 is configured to move around the axis of the leader 40, the leader 40 is reversed when the traveling direction of the pile driving work by the pile construction machine 10 is reversed. The earth auger 30 can be moved rearward in the traveling direction by rotating.

  After the pile driving operation is completed as described above, the pile construction machine 10 stopped at the central portion C of the temporary mount 1 is disassembled, and each component is carried out from the temporary mount 1 by a lift.

Thus, in the pile construction machine 10 of the present invention, the base frame 20 including the leader 40 to which the earth auger 30 is attached can move on the temporary mount 1, so that the pile construction machine 10 is moved. It is no longer necessary to arrange a large lifting machine next to the temporary mount 1. As a result, there is no need to provide a wide road around the construction site, so the work can be performed with sufficient consideration for the environment around the construction site.
Further, when the traveling direction of the pile driving work by the pile construction machine 10 is reversed, the position of the earth auger 30 is adjusted by rotating the leader 40 without reversing the entire pile construction machine 10 on the temporary mount 1. Therefore, it is not necessary to greatly expand the width of the temporary mount 1 than the width of the base frame 20, and the cost for constructing the temporary mount 1 can be reduced.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, in this embodiment, the pile construction machine 10 for performing the pile driving work from the temporary mount 1 has been described. However, the pressure applied by the chuck that holds the pile P and the hydraulic jack that applies the tensile force to the pile P is described. By attaching the means to the reader 40, the pile P can be pulled out using the pile construction machine 10. In this configuration, the pile P can be pulled out by applying a tensile force to the pile P from the hydraulic jack in a state where the top of the pile P is gripped by the chuck. At this time, the weight of the pile P and the stress due to the frictional force between the pile P and the ground act on the base frame. In the pile construction machine 10 of this embodiment, as shown in FIG. Is supported by each outrigger 23..., It is possible to prevent the load supported by the temporary mount 1 from increasing.

  Moreover, in the pile removal work, since the pile construction machine 10 cannot pass above the pile as in the pile driving work, the pile construction machine 10 is temporarily installed while performing the pile removal work on the front side in the traveling direction. After moving from the center part C of the gantry 1 to the front end part F, it is necessary to perform the pile removal work while moving the pile construction machine 10 from the center part C of the temporary gantry 1 toward the rear end part B. At this time, since the chuck and the hydraulic jack must always be arranged on the front side in the traveling direction, when the traveling direction of the pile removing operation by the pile construction machine 10 is reversed, the leader 40 is rotated. The chuck and the hydraulic jack are moved forward in the traveling direction.

  In addition, like the structure of the pile construction machine 10 used for the said pile extraction operation | work, by giving a pressure input to the pile P using the pressurizing means which consists of a chuck | zipper and the hydraulic jack attached to the leader 40, a pile P can also be pressed into the ground.

  Moreover, in this embodiment, as shown in FIG. 1, the pile construction machine 10 is configured to move on the temporary mount 1 by a plurality of wheels 25 provided on the lower surface of the base frame 20. For example, a configuration in which a plurality of round pipes (rollers) are provided and moved between the base frame 20 and the temporary mount 1 or a configuration in which the base frame 20 is moved on a rail laid on the temporary mount 1 Although not limited, it is preferable to provide a plurality of fulcrums between the base frame 20 and the temporary mount 1 so that the load of the pile construction machine 10 is dispersed and acts on the temporary mount 1. .

  Further, in the present embodiment, as shown in FIG. 2, the leg portions 24 of the outriggers 23... Are configured to contact the ground inside the temporary mount 1. Each outrigger 23... May be provided at a position protruding from the side, and the leg portion 24 may be configured to contact the ground outside the temporary mount 1. In this structure, when moving the pile construction machine 10, the pile construction machine 10 can be moved by slightly raising the lower end part of the leg part 24 from the ground.

  Further, a holder that holds the auger screw 34 in an upright state may be provided on the upper surface of the base frame 20. Specifically, a cylindrical holder into which the lower end portion of the auger screw 34 can be inserted is provided on the rotation path of the auger output device 31 that moves around the axis of the reader 40 (see FIG. 3). When the auger screw 34 is added, the auger screw 34 to be added is held by the holder, and the leader 40 is rotated, so that the auger output device 31 is placed above the auger screw 34 held by the holder. Move and install. Thereafter, the auger output device 31 and the auger screw 34 are moved above the drilling position by rotating the leader 40, so that the auger screw 34 already inserted in the ground can be added. Thereby, the auger screw 34 can be easily added and the storage area of the auger screw 34 can be reduced.

  Furthermore, when each auger screw 34 that has been added is disconnected, the leader 40 is rotated with only the uppermost auger screw 34 attached to the auger output device 31, and the lower end of the auger screw 34 is inserted into the holder. Then, by removing the auger screw 34 from the auger output device 31, the auger screw 34 can be stored in a standing state on the base frame 20.

It is the side view which showed the pile construction machine of this embodiment. It is the figure which showed the pile construction machine of this embodiment, and is AA sectional drawing of FIG. It is the top view which showed the pile construction machine of this embodiment. It is the figure which showed the pile construction machine of this embodiment, and is the side view of the state which spaced apart the leg part of the outrigger from the ground. It is the figure which showed the pile driving operation using the pile construction machine of this embodiment, (a) is a top view of the aspect which moved the pile construction machine toward the center part from the front-end part of a temporary mounting stand, (b) is The top view of the aspect which moved the pile construction machine from the center part of the temporary mount to the rear end part, (c) is the plane of the aspect which moved the pile work machine from the rear end part of the temporary mount to the central part The figure and (d) are top views of the aspect which stopped the pile construction machine in the center part of the temporary mount. It is the side view which showed the conventional pile construction machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Temporary mount 10 Pile construction machine 20 Base frame 23 Outrigger 24 Leg 25 Wheel 30 Earth auger 31 Auger output device 34 Auger screw 40 Leader 43 Rotation base 50 Crane F Front end of temporary mount B Rear end of temporary mount C Temporary mount Central part of the pile P

Claims (3)

A pile construction machine placed on a gantry constructed on the ground,
A base frame that moves on the mount;
A drilling means for excavating the ground, or a leader to which a pressing means for applying pressure input or tensile force to the pile is attached,
The reader is erected on the base frame so as to be rotatable around an axis,
A pile construction machine characterized in that the drilling means or the pressure applying means attached to the leader is configured to move around the axis of the leader as the leader rotates. The base frame is provided with an outrigger having a leg portion that can freely move up and down,
The pile construction machine according to claim 1, wherein the base frame is supported by the outrigger by lowering the leg portion of the outrigger and bringing it into contact with the ground.   The pile construction machine according to claim 1 or 2, wherein the base frame is provided with lifting means.

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