JP2018204320A - Pile driving machine and pile driving method - Google Patents

Abstract

To provide a pile driving machine which can reduce load applied to a device in a work than conventional ones, and which can perform stable work at a lower center of gravity, by simply configuring and reducing weight of an excavation mechanism and press-in mechanism.SOLUTION: A pile driving machine comprises: a work instrument main body 1; a leader 2 provided in the work instrument main body 1; a drifter 3; and an auger 4 attached to the drifter 3. The drifter 3 includes: a chuck portion 32 movably converted to the leader 2 and chucking the auger 4; a passing portion 31 releasing a chuck state by the chuck portion 32 and making the auger 4 slidably pass through; and a pile cap 34 for setting and pressing in the pile.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pile driving machine and a pile driving method. Specifically, in the pile driving machine that excavates the guide hole and press-fits the pile into the guide hole, the excavation part and the press-in part are configured more simply, and the load on the pile driving machine is reduced by reducing the weight. It is related with the thing which can be reduced more than the conventional thing, and can work stably with a lower center of gravity.

  When building or the like is built on the ground, a ground survey is performed in advance. If there is a risk of subsidence after construction, such as when the ground is soft, ground improvement for strengthening the ground is performed. There are several methods for ground improvement, and the pile method is one of them.

  In the pile construction method, a pile driving machine for building steel pipe piles and wooden piles in the ground is used. An example of a pile driving machine is a pile driving device described in Patent Document 1. In this conventional pile driving device, a guide hole is excavated in the ground by an auger, and then a pile is press-fitted into the guide hole and built.

Please refer to FIG.
FIG. 5 shows FIG. 1 of Patent Document 1 more clearly.
The pile driving device B wraps the excavating mechanism 42 attached to the upper part of the auger 41 and the press-fitting mechanism 43 of the pile close to each other in the both grooves of the leader 44 having a substantially H-shaped cross section and standing upright. With this structure, the excavation mechanism 42 and the press-fitting mechanism 43 can be operated simultaneously.

  Moreover, according to this pile driving apparatus B, it is easy to carry and transport, and it is possible to realize the pile driving work in a small space, and further, the pressure input at the time of pile penetration is minimized and efficient. It is said that it can be driven in well and can achieve a high precision pile driving operation.

JP-A-8-53838

However, the pile driving device B described in Patent Document 1 has the following problems.
That is, the excavation mechanism 42 and the press-fit mechanism 43 provided in the pile driving device B are independent mechanisms, and the excavation mechanism 42 and the press-fit mechanism 43 each have a drive unit such as a drive motor or a drive chain. I have.

  As a result, the overall mechanism of the apparatus becomes large and complicated, and the weight of the apparatus is increased accordingly, and the position of the center of gravity is also increased. Therefore, the load applied to each part of the apparatus in the work is increased, and it is difficult to stably perform the pile driving work.

  The present invention was devised in view of the above points, and in the pile driving machine for excavating the guide hole and press-fitting the pile into the guide hole, the excavation part and the press-in part are configured more simply, The purpose of the present invention is to provide a pile driving machine and a pile driving method that can reduce the load applied to the pile driving machine in the work by reducing the weight, and can perform stable work with a lower center of gravity. It is what.

(C-1) In order to achieve the above object, the present invention is replaced with a work machine body, a reader provided to the work machine body so as to be adjustable in angle, and movable with respect to the reader. An excavation drive portion having a chuck portion, a through portion, and a pressing portion for press-fitting the set pile, and chucked by the chuck portion while being slidably passed through the through portion of the excavation drive portion A pile driving machine provided with an auger that is provided, and an auger holding portion that is provided in the leader and can be switched between a steadying by holding the auger rotatably and a fixing of the auger.

  The pile driving machine of the present invention is first placed on the ground at a predetermined place where the ground is improved. The reader is usually set in the vertical direction. Note that the reader may be set to be inclined at a required angle with respect to the vertical direction. The excavation drive unit can move in either direction along the leader. For example, a structure in which the excavation drive unit is moved by chain drive is adopted, but the present invention is not limited to this.

  The auger drive part is attached by chucking with a chuck part in a state where the auger is passed through the through part. The lower part of the auger is rotatably held by the auger holding part. In this state, the auger holding part has a function as a steadying of the rotating auger.

  Moreover, the chuck | zipper part is provided so that it may rotate with the rotation drive part with which an excavation drive part is provided, and the rotational force of a rotation drive part is transmitted to an auger by chucking. In the chucked state, the auger is set parallel to the leader, that is, normally in the vertical direction. And a guide hole can be drilled in the ground when the excavation drive part descends while rotating the auger.

  Further, the excavation drive unit can move along the leader while maintaining the auger standing state in the state where the auger chuck state is released. When the excavation drive unit is moved in a state where the tip portion of the auger is fixed to the ground, the upper portion of the auger substantially serves as a guide for the excavation drive unit, and thus stable movement is possible.

  The excavation drive unit is raised along the leader, the auger is extracted from the guide hole, and the auger is shifted from the position of the guide hole so that the pressing unit is aligned with the position of the guide hole. Set the pile on the pressing part so that the tip of the pile matches the position of the guide hole. Then, by releasing the chucking state of the auger and lowering the excavation drive unit in that state, the pile can be pressed by the pressing unit and press-fitted into the guide hole to the required depth.

  Moreover, the pile driving machine has a configuration in which a function as a press-fitting mechanism is also provided by providing a pressing unit in the excavation drive unit, and the excavation mechanism and the press-fitting mechanism are not separate. Thereby, compared with the conventional pile driving device in which the excavation mechanism and the press-fitting mechanism are provided independently of each other, the structure is simpler and lighter. Therefore, the load applied to each part of the pile driving machine in the work can be reduced as compared with the conventional one, and a stable work can be performed with a lower center of gravity.

  In the press-fitting of the pile, when the necessary pressing force is relatively small, for example, when the ground is slightly soft or the diameter of the pile is slightly small, the pile can be press-fitted into the ground as described above. However, when the pressing force required for the press-fitting of the pile is relatively large, for example, when the ground is slightly hard or the pile diameter is a little larger, or when the piles are added and pressed deeper, the pile driver Should not be lifted by the reaction force during the press-fitting of the pile.

  That is, in this case, from the state in which the pile is press-fitted into the guide hole, the excavation drive unit is raised to the required height, and the auger is chucked by the chuck unit. In this state, the excavation drive unit is lowered, the fixing hole is drilled in the ground by the auger, and the auger is fixed to the ground. It is preferable to adjust the rotational force of the auger so that the screw provided in the auger does not easily come out by being bitten by the ground.

  When the auger is fixed to the ground, the auger holding part provided in the leader and passing through the auger holds the auger so as to grasp it. As a result, the auger cannot rotate or slide with respect to the auger holding portion, and the auger, the reader, and the work machine main body are integrated. The chuck state of the auger by the chuck portion of the excavation drive unit is released, and the excavation drive unit is raised to the required height. In this state, a pile is set on the pressing portion. The pile in this case may be a pile that is initially press-fitted into the guide hole, or may be a follow-up pile that comes into contact after such a preceding pile.

  After setting the pile in the pressing part, the excavation drive part is lowered and the pile is press-fitted into the guide hole. At this time, the reaction force of the pressing force acting on the excavation drive portion via the pressing portion (the force having the same strength in the direction opposite to the pressing force) is offset by the pulling force acting on the auger, and the action / reaction force Therefore, it is possible to prevent the leader side of the pile driving machine from being lifted, and the press-fitting of the pile can be performed smoothly.

(C-2) The pile driving machine concerning this invention can also be set as the structure provided with the suspension means for hanging the said pile and setting to the said press part.

  In this case, the pile can be lifted by the suspending means, and the head portion can be set on the pressing portion. The piles that are pressed into the ground and built are generally wooden piles, concrete piles, steel pipe piles, etc., and are heavy, so using the lifting means makes the pile lifting work efficient and safe. It can be carried out.

(C-3) The pile driving machine according to the present invention has a configuration in which the center of the threading part and the center of the pressing part are on the same arc centering on the turning axis of the turning part of the working machine body. You can also

  In this case, after drilling the guide hole with the auger and removing it from the ground, the turning part (for example, the cab) of the work implement body is turned by a predetermined angle, and the auger is shifted from the position of the guide hole, It is located so that a press part may overlap above a guide hole. Thereby, when a pile is set in the pressing portion, the tip of the pile that is normally suspended and set can be positioned so as to automatically fit the guide hole.

(C-4) In order to achieve the above object, the pile driving method according to the present invention includes a step of lowering the excavation drive unit that chucks the auger and drilling a guide hole in the ground by the auger; Raising the excavation drive unit and extracting the auger from the guide hole; shifting the auger from the position of the guide hole; and aligning the pressing portion of the excavation drive unit with the position of the guide hole; A step of setting a pile in the pressing portion, and a step of releasing the chuck state of the auger, lowering the excavation driving portion, pressing the pile with the pressing portion, and press-fitting into the guide hole. Prepare.

  In the pile driving method of the present invention, the excavation drive unit that chucks the auger is lowered, the guide hole is drilled in the ground by the auger, and so-called pre-boring is performed. Thereby, the press-fitting of the pile into the subsequent guide hole can be stably performed in a determined direction without requiring a very large pressing force.

  Moreover, the guide hole used as the guide for the press injection of a pile can be formed by raising the excavation drive part and extracting the auger from the guide hole.

  Then, the auger is shifted from the position of the guide hole, and the pressing portion of the excavation drive unit is aligned with the position of the guide hole. Thereby, when a pile is set in a press part, the operation | work which matches a pile to the position of a guide hole becomes easy. By setting the pile on the pressing portion, the pile is positioned at a predetermined position where the pressing portion can be press-fitted, that is, the tip portion is aligned with the guide hole.

  By releasing the auger chuck state, lowering the excavation drive part, pressing the pile with the pressing part, and press-fitting into the guide hole, the pile can be built in the ground without applying unnecessary load on the auger. It can be carried out.

  Moreover, in this pile driving method, the function as a press-fit mechanism by a press part is also provided to the excavation drive part, and the pile is press-fitted. As a result, the excavation mechanism and the press-fitting mechanism have a simpler structure, unlike the pile driving method that uses the conventional pile driving device provided independently for the excavation mechanism and the press-fitting mechanism. Thus, it can be performed by using a lighter machine. Therefore, it is possible to reduce the load applied to the pile driving machine in the work compared to the conventional one.

(C-5) In order to achieve the above object, the pile driving method according to the present invention includes a step of lowering the excavation drive unit that chucks the auger and drilling a guide hole in the ground by the auger; Raising the excavation drive unit and extracting the auger from the guide hole; shifting the auger from the position of the guide hole; and aligning the pressing portion of the excavation drive unit with the position of the guide hole; A step of setting a pile in the pressing portion, a step of releasing the chuck state of the auger, lowering the excavation driving portion, pressing the pile with the pressing portion, and press-fitting into the guide hole, The step of raising the excavation drive unit to chuck the required portion of the auger, the lowering of the excavation drive unit, drilling a fixing hole in the ground by the auger, and fixing the auger to the ground Process and Releasing the chuck state of the auger, raising the excavation drive unit, setting a follower pile on the pressing unit, grasping and fixing the auger with a holding unit of the leader, and the excavation drive And a step of pressing the additional pile applied to the pile with the pressing portion and press-fitting the guide hole together with the pile.

  In the pile driving method of the present invention, the excavation drive unit that chucks the auger is lowered, the guide hole is drilled in the ground by the auger, and so-called pre-boring is performed. Thereby, the press-fitting of the pile into the subsequent guide hole can be stably performed in a determined direction without requiring a very large pressing force.

  Moreover, the guide hole used as the guide for the press injection of a pile can be formed by raising the excavation drive part and extracting the auger from the guide hole.

  Then, the auger is shifted from the position of the guide hole, and the pressing portion of the excavation drive unit is aligned with the position of the guide hole. Thereby, when a pile is set in a press part, the operation | work which matches a pile to the position of a guide hole becomes easy. By setting the pile on the pressing portion, the pile is positioned at a predetermined position where the pressing portion can be press-fitted, that is, the tip portion is aligned with the guide hole.

  By releasing the auger chuck state, lowering the excavation drive part, pressing the pile with the pressing part, and press-fitting into the guide hole, the pile can be built in the ground without applying unnecessary load on the auger. It can be carried out.

  Next, the excavation drive unit is raised to the required height and the auger is chucked, so that the auger can make a hole in the ground.

  The fixed auger can function as a guide when the excavation drive unit moves by lowering the excavation drive unit, drilling a fixing hole in the ground with the auger, and fixing the auger to the ground. It becomes like this.

  Release the auger chuck state, raise the excavation drive part, and set the additional pile on the pressing part. It becomes possible to hit the tip.

  By holding and fixing the auger with the holding part of the leader, the auger and the leader fixed to the ground are integrated via the auger holding part. Thereby, the leader side of the pile driver does not easily float upward, and the posture of the pile driver is stabilized.

  After setting the pile on the pressing portion, the chuck state of the auger by the chuck portion of the excavation drive unit is released, the excavation drive unit is lowered, and the pile is press-fitted into the guide hole. At this time, the reaction force of the pressing force acting on the excavation drive unit via the pressing unit is canceled out by the pulling force acting on the auger, and the balance of the action and reaction force is balanced, so that the leader side of the pile driving machine is lifted This can be suppressed and the press-fitting of the pile can be performed smoothly.

  In this way, by lowering the excavation drive unit, pressing the additional pile applied to the pile with the pressing unit, and press-fitting it into the guide hole together with the pile, it is necessary to add the required number of additional piles and to connect the pile to the required depth. Can be press-fitted.

  Moreover, in this pile driving method, the function as a press-fit mechanism by a press part is also provided to the excavation drive part, and the pile is press-fitted. As a result, the excavation mechanism and the press-fitting mechanism have a simpler structure, unlike the pile driving method that uses the conventional pile driving device provided independently for the excavation mechanism and the press-fitting mechanism. Therefore, it can be performed by using a lighter device. Therefore, the load applied to the pile driving machine in the work can be reduced as compared with the conventional one, and the stable work can be performed with a lower center of gravity.

  The present invention relates to a pile driving machine for excavating a guide hole and press-fitting a pile into the guide hole. The excavation part and the press-fitting part are configured more simply and reduced in weight, and thus the pile driving machine is used in work. It is possible to provide a pile driving machine and a pile driving method that can reduce the load compared to the conventional one and can perform a stable operation with a lower center of gravity.

It is a front view showing one embodiment of a pile driving machine concerning the present invention. It is a side view of the pile driving machine shown in FIG. It is a schematic plan view explanatory drawing of the pile driving machine shown in FIG. It is explanatory drawing of the pile driving method using the pile driving machine which concerns on this invention. It is a front view which shows the structure of the conventional pile driver.

An embodiment of the present invention will be described in more detail with reference to FIGS.
The pile driving machine A includes a work machine body 1 of a base machine, a leader (also referred to as a guide cell) 2 having an adjustable angle, and a drifter that is an excavation drive unit that moves along the leader 2. 3 and an auger (also referred to as an earth auger) 4 that is detachably attached to the drifter 3 and forms a hole in the ground.

  The work machine body 1 is a crawler type and includes a cab 10 that is a turning unit (a turning unit). The cab 10 can turn around the turning axis 100. At the front of the cab 10 is provided a guide body 12 whose angle can be adjusted by expansion and contraction of the rod of the hydraulic cylinder 11. In addition, the work machine body 1 is provided with an outrigger 13 for stably placing the pile driving machine A on the ground.

  A leader 2 is fitted to the guide body 12 so as to be slidable within a certain range along the guide body 12 by a hydraulic cylinder 14. The reader 2 has a guide portion 20 provided on the front portion thereof over almost the entire length. Moreover, the leader 2 is provided with a winch 21 that is a hanging means for hanging a pile press-fitted into the ground with a wire 210.

  A drifter 3 is mounted on the guide portion 20 so as to be movable along the guide portion 20. The drifter 3 can be moved up and down via a drive chain mechanism (not shown). A through portion 31 is provided in the center of the drifter 3 so as to penetrate in a direction parallel to the reader 2.

  The through portion 31 has an inner diameter that is slightly larger than the diameter of the shaft portion on the upper side of the auger 4. As a result, the auger 4 is slidable relative to the drifter 3 in a state where the shaft portion excluding the screw 40 provided at the tip portion is passed through the through portion 31.

  A chuck portion 32 that chucks the auger 4 is provided below the drifter 3. The chuck portion 32 can perform a chucking operation of the auger 4 and a chucking state releasing operation. The chuck portion 32 is rotationally driven via a drive portion such as a hydraulic motor 33 and a gear.

  The drifter 3 is provided with a pile cap 34 as a pressing portion on the side opposite to the hydraulic motor 33. The pile cap 34 is attached via an arm 340 that is fixed to the casing (not shown) of the drifter 3 and protrudes. A concave portion 341 for fitting the head portion of the pile is provided on the lower surface of the pile cap 34.

  The auger 4 passes the base side (when used, the upper side) through the passage part 31 of the drifter 3 positioned at a predetermined height of the guide part 20, and the shaft part is held by the chuck part 32 and attached in the vertical direction. It has been. In addition, an auger holding portion 22 is provided at the lower end portion of the reader 2 so as to rotatably hold the shaft portion of the auger 4 close to the screw 40 and to allow chucking.

  With this structure, the auger holding unit 22 has a function as a steadying of the auger 4 when the auger 4 rotates to excavate the ground, and the auger 4 and the leader are in a state where the auger 4 cannot be rotated or slid. It has a function to connect 2 and integrate.

  With reference to FIG. 1 thru | or FIG. 4, the pile driving method in the ground improvement using the action of the pile driving machine A and the pile driving machine A is demonstrated.

(Operation of pile driver A)
The pile driving machine A is placed on the ground G at a predetermined place where the ground is improved. At the time of construction, the reader 2 is set in the vertical direction. The drifter 3 can be moved in the vertical direction (vertical direction) along the reader 2 by a drive chain mechanism.

  In the state where the shaft portion of the auger 4 is passed through the passage portion 31, the drifter 3 is attached by being chucked by the chuck portion 32. That is, the auger 4 can be attached to and detached from the drifter 3. By this chucking, the rotational force of the rotational drive unit is transmitted to the auger 4. Then, when the drifter 3 is lowered while rotating the auger 4, the guide hole 5 can be drilled in the ground G.

  Further, the drifter 3 can move along the reader 2 while maintaining the state where the auger 4 is standing in a state where the chucked state by the chuck portion 32 of the auger 4 is released. When the drifter 3 is moved in a state where the tip portion of the auger 4 is fixed to the ground G, the upper portion of the auger 4 substantially serves as a guide for the drifter 3, so that the drifter 3 can be moved stably. It is.

  After cutting the guide hole 5 with the auger 4, the auger 4 is extracted from the guide hole 5, and the driver's cab 10 is swung at a required angle. It can be adjusted to the position above.

  In this state, the pile 6 is suspended by the winch 21, set on the pile cap 34, and the pile 6 is suspended, whereby the tip end portion can be aligned with the guide hole 5. Then, by releasing the chucked state by the chuck portion 32 of the auger 4 and lowering the drifter 3, the pile 6 can be pressed by the pile cap 34 and press-fitted into the guide hole 5.

  Further, the pile driving machine A has a configuration in which a function as a press-fitting mechanism is provided to the drifter 3 by providing the pile cap 34 on the drifter 3 that is the excavation mechanism unit. Thereby, since it has a simpler structure than the conventional pile driving device and is lightened, the load applied to the device during work can be reduced as compared with the conventional one. Therefore, according to the pile driving machine A, a stable operation is possible with a lower center of gravity.

(Pile driving method using pile driver A)
Reference is mainly made to FIG.

(1) Reference is made to FIG.
Place the pile driver A on the ground G. The auger 4 is chucked by the chuck portion 32 of the drifter 3 rising to the required height of the reader 2 and set in the vertical direction.

(2) Reference is made to FIG.
While rotating the auger 4, the drifter 3 is lowered to a required height, and the auger 4 drills a guide hole 5 having a required depth in the ground G.

(3) Reference is made to FIG.
The drifter 3 is raised while rotating the auger 4 in the same direction as in the above (2), and the auger 4 is removed from the guide hole 5. Then, by rotating the cab 10 by a required angle and shifting the auger 4 from the guide hole 5, the pile cap 34 is automatically above the guide hole 5, that is, above the vertical line passing through the center of the guide hole 5. To position.

(4) Reference is made to FIG.
The pile 6 is suspended by the wire 210 of the winch 21, the head portion of the pile 6 is fitted into the concave portion 340 of the pile cap 34, the pile 6 is set in a state of hanging vertically, and the wire 210 is removed from the pile 6. Thereby, the tip of the pile 6 is located at the center of the hole of the guide hole 5.

(5) Reference is made to FIG.
The chucked state by the chuck portion 32 of the auger 4 is released, the drifter 3 is lowered, the pile 6 is pressed by the pile cap 34, and is pressed into the guide hole 5. In addition, since the pile driving machine A is provided with a pile cap 34 on the drifter 3 and has a simple structure as a whole, and is light in weight, the load applied to the apparatus during work is reduced compared to the conventional one. be able to. Therefore, according to the pile driving machine A, a stable operation is possible with a lower center of gravity. Moreover, in the press-fitted state at this time, the head portion of the pile 6 is in a state protruding slightly upward from the guide hole 5.

  In the press-fitting of the pile 6, when the necessary pressing force is relatively small, for example, when the ground G is slightly soft or the diameter of the pile 6 is slightly small, the pile 6 is applied to the ground G as described above. Can be press-fitted. On the other hand, when the pressing force required for press-fitting of the pile 6 is relatively large, for example, when the ground G is slightly hard, the diameter of the pile 6 is slightly large, or when the pile 6 is added and pressed deeper, The pile driving machine A should not be lifted by the reaction force when the pile 6 is press-fitted. Hereinafter, the case where the additional pile 8 is added to the pile 6 and deeply press-fitted is described.

(6) Reference is made to FIG.
The drifter 3 is raised to the required height, and the chuck portion 32 chucks the shaft portion of the auger 4. Thereafter, the drifter 3 is lowered while rotating the auger 4, and a fixing hole 7 shallower (shorter) than the guide hole 5 is drilled next to the guide hole 5 by the auger 4, and the auger 4 is fixed to the ground G. This drilling operation is performed by adjusting the rotational force of the auger 4 so that the screw 40 of the auger 4 bites into the ground G and the biting is effective and the auger 4 cannot be easily pulled out.

  When the auger 4 is fixed to the ground G, the auger holding portion 22 provided at the lower portion of the reader 2 and passing through the auger 4 grips and holds the shaft portion of the auger 4. As a result, the auger 4 fixed to the ground G cannot be rotated or slid with respect to the auger holding unit 22, and the auger 4 and the reader 2 are connected to each other via the auger holding unit 22. Turn into. Further, the chucked state of the auger 4 by the chuck portion 32 is released, and the drifter 3 is raised to a required height. Next, the follower pile 8 formed shorter than the pile 6 is set by the winch 21 so as to hang vertically on the pile cap 34, and the tip (lower end) is applied to the head portion of the pile 6.

(7) Reference is made to FIG.
The drifter 3 is lowered, the follower pile 8 is pressed by the pile cap 34, and is pressed into the guide hole 5 together with the pile 6 that has been previously pressed. At this time, the reaction force of the pressing force acting on the drifter 3 via the pile cap 34 is offset by the pulling force acting on the auger 4, so that the balance of the action and reaction forces can be balanced. Thereby, it can suppress that the leader side of the pile driving machine A floats, and since the pressing force by the drifter 3 which acts on a pile is used effectively without waste, the press-fit of the pile 6 can be performed smoothly.

  The terms and expressions used in the present specification and claims are for illustrative purposes only, and are not intended to be limiting in any way. The features described in the present specification and claims and their terms There is no intention of excluding some equivalent terms and expressions. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

A pile driver 1 work machine main body 10 cab 100 pivot shaft 11 hydraulic cylinder 12 guide body 13 outrigger 14 hydraulic cylinder 2 leader 20 guide part 21 winch 210 wire 22 auger holding part 3 drifter 31 through part 32 chuck part 33 hydraulic motor 34 Pile cap 340 Arm 341 Recess 4 Auger 40 Screw

Claims (5)

The work machine body,
A reader provided to the work machine main body so that the angle can be adjusted;
An excavation drive unit that is movably replaced with respect to the leader, and has a chuck part, a through part, and a pressing part for press-fitting a set pile;
An auger chucked by the chuck portion in a state in which it is slidably passed through the through portion of the excavation drive portion;
A pile driving machine comprising: an auger holding unit provided on the leader and capable of switching between a steadying by holding the auger rotatably and a fixing of the auger. The pile driving machine according to claim 1, further comprising suspension means for hanging the pile and setting it in the pressing portion. 3. The pile driving machine according to claim 1, wherein a center of the through portion and a center of the pressing portion are on the same arc centering on a turning axis of a turning portion of the work machine main body. Lowering the excavation drive unit that chucks the auger and drilling a guide hole in the ground by the auger;
Raising the digging drive and extracting the auger from the guide hole;
Shifting the auger from the position of the guide hole and aligning the pressing portion of the excavation drive unit with the position of the guide hole;
A step of setting a pile on the pressing portion;
A pile driving method comprising: releasing the chuck state of the auger, lowering the excavation drive unit, pressing the pile with the pressing unit, and press-fitting into the guide hole. Lowering the excavation drive unit that chucks the auger along the leader, and drilling a guide hole in the ground by the auger;
Raising the digging drive and extracting the auger from the guide hole;
Shifting the auger from the position of the guide hole and aligning the pressing portion of the excavation drive unit with the position of the guide hole;
A step of setting a pile on the pressing portion;
Releasing the chuck state of the auger, lowering the excavation drive unit, pressing the pile with the pressing unit, and press-fitting into the guide hole;
Raising the excavation drive and chucking the required location of the auger;
Lowering the excavation drive unit, drilling a fixing hole in the ground by the auger, and fixing the auger to the ground;
Releasing the chuck state of the auger, raising the excavation drive unit, and setting the additional pile on the pressing unit;
Gripping and fixing the auger with a holding part of the reader;
A pile driving method comprising: a step of lowering the excavation drive unit, pressing the additional pile applied to the pile with the pressing unit, and press-fitting into the guide hole together with the pile.

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