JP6426551B2 - Ground driving method of long pile - Google Patents

Description

In the present invention, a plurality of piles are joined from the ground surface to make the ground work for ground improvement work such as soft ground, ground landfill site, beach landfill site, ground reforming work, and work to improve the bearing capacity of the underground ground. A long pile is driven into deep ground, and a ground improvement material is injected into the deep ground from the surface through the internal passage of the long pile, and the ground improvement material is mixed with the soil of the ground with a stirring device attached to the lower end of the pile. It is used for work to improve the ground strength and ground bearing capacity by stirring, and soil modification of the ground, and moves the pile up and down along a vertical leader that can be swiveled to a movable work vehicle. TECHNICAL FIELD The present invention relates to a method for driving a long pile using a pile driving machine having a lifting device and a rotary unit for rotating a pile.
In addition to the above ground improvement work, the present invention also aims at the drilling of a survey pile for geological collection investigation of the ground, drilling of holes reaching deep into the ground, or wiring holes such as material insertion holes and sensors in the ground, etc. Method for long piles that can be used for drilling work

  Conventionally, for the improvement of soft ground, a vertical leader is attached to the tip of the boom on the swivel base of the crawler car, and along this leader, a long pile connecting several piles up and down is arranged, and the pile top BACKGROUND A pile driving machine having a structure in which a rotary unit that holds and rotates a long pile can be moved up and down along a leader is widely used. When this pile driving machine is stopped on the ground near the ground improvement zone and the ground improvement work is performed deep in the ground, a long material is required to reach from the ground surface to the ground depth of the ground improvement.

In that case, a long pile length H ₀ to reach the above ground improved the leader to form in the footsteps plurality of piles in engagement, there is a working method of implanting the elongated pile ground. In this work method, a long leader is required because the length of the long pile is H ₀ or more (for example, about 20 m) as the height of the leader first, and a long leader is required. In addition to being necessary, as shown in FIG. 11, the height of the leader may be increased to cause shaking, and instability may be increased to be dangerous. Furthermore, a crane operation is required to suspend and join a plurality of piles with a crane apparatus, and when the position to be joined becomes high, there is a danger in the pile joining operation.

Connect all the necessary piles to the leader and connect the lowest pile and the highest pile held by the rotating part, and drive only the lowest pile first, and then put the highest pile and the lowest pile The upper end of the lowermost pile is left on the ground surface and screwed with the lower end of the upper middle pile, and the upper end of the middle pile and the lower end of the uppermost pile There is also a working method in which the connected piles are driven into the ground and the necessary intermediate piles are driven in until the lower end of the lowermost pile reaches the predetermined ground depth. In this method, the height of the leader can be kept low, and there is an advantage that the leader swings less and becomes stable.
However, even after moving the intermediate pile placed near the site to the upper side of the pile driven by a crane, screwing and joining with the upper end of the drilled pile and joining with the lower end of the topmost pile Is required. For this reason, it is dangerous work because the crane work enters the joint work and the upper joint position becomes the joint work at a high position.

  Thus, although the height of the leader can be lowered by the latter working method, it is necessary to perform the piling work at the lower end and the upper end of the intermediate pile after one pile driving. This jointing operation takes time and effort using a crane, and there is a problem in that it is dangerous because the jointing operation at the upper end of the intermediate pile becomes a high place.

  Moreover, in patent document 1, the invention of the supplement method of the casing of a soft ground improvement apparatus and its apparatus is known. In the present invention, when the lower pile and the upper pile are attached in parallel to the leader of the pile driving machine and the lower pile is first driven into the ground with the leader in the driving position, the upper portion is left on the ground and then the leader The other upper pile attached to the top is rotated to the driving position of the leader, and the upper end of the driven lower pile and the lower end of the upper intended pile are connected, and then the upper pile is driven along the leader to ground The ground improvement is carried out as a long pile of the total length of the lower pile and the upper pile.

  However, in this pile driver, a plurality of piles to be connected must be attached in parallel to the leader and the device must be able to rotate to the driving position, so the weight of the leader becomes large and the leader It has the disadvantage of becoming unstable.

Japanese Patent Application Laid-Open No. 10-37177

  The problem to be solved by the present invention is that the height of the leader of the pile driving machine to be used can be lowered to make the leader swing less and safer, and the piling work of the middle pile constituting the long material is safe. And quick to make the pile driving operation safe and efficient.

The configuration of the present invention that solves the problem is:
1) A ground driving method of a long pile in which a long pile is driven into the ground by using a pile driving machine, wherein the long pile is a top pile, a bottom pile and three intermediate piles in between. The plurality of piles above are formed by screwing together at the upper and lower ends, and the screwed portion of the lower end of the top pile of the long pile is the upper end of the other lower pile of the long pile and The pile driving machine is of a structural size that can be screwed and connected, and the pile driving machine mounts a vertical leader at the tip of a hoisting and telescopic boom mounted on the swing table of a crawler car, and the pile on the same leader Is mounted so that it can move up and down, and a rotating part capable of holding and rotating the middle of the top pile of the long pile can be moved up and down along the leader, and the same rotating part along the leader It is of a structure provided with a lifting device to move up and down, and by the swing of the swivel base and the ups and downs of the boom The vertical leader can be moved from the stopping position of the pile driving machine to a predetermined range, and with the operation of the lifting device and rotating part, the pile attached to the leader can be driven into the ground by applying rotation and pushing force. ,
A long pile is driven into the ground in the following steps A to G using the pile driving machine, a plurality of piles which can be made into a long pile when connected, and equipment necessary for the driving operation, Ground driving method of long pile
Note A: The same pile driving machine stopped by moving the pile driving machine by a crawler to a ground position where pile driving work can be performed near the surface area where the long material will be driven toward the ground and the pile driving machine stopped. The top of the pile that makes up the long material is held by the rotating part in the leader of the pile, and then the standby ground surface area is set on the ground surface that does not interfere with pile driving within the range where the leader of the pile driving machine can turn. After attaching the tip cap for earth and sand entry prevention to the lower end of the intermediate pile in the same standby area surface area, the upper end of the intermediate pile has a height that can be connected with the uppermost pile as a lower position in the leader. Intermediate pile standby process to vertically insert an intermediate pile into the ground of the pile and wait: Use a crane below the top pile of a long pile held by the rotating part of the leader of the pile driving machine Move the lowermost piles of long piles, screw them together, and under the lowermost piles The lower pile connection process C: Mount the equipment necessary for the required work in the ground on the ground and move the leader to the ground position of the predetermined driving of the driving ground surface section C: Rotating part at the pile driving position of the driving ground surface section And lowers the connection pile of the top and bottom piles and drives the bottom pile into the ground, and the rotating part at a position where the top of the bottom pile is at a predetermined height from the ground surface And the raising and lowering device is stopped, most of the upper end of the lowermost pile embedded in the ground and the lower end of the uppermost pile are unscrewed to separate the connected piles, and the lowermost pile is embedded in the ground Move the leader to the standby ground surface area by leaving the lower pile drive stroke D: Move the leader to the standby ground surface area in the C stroke, and place the top pile of the leader in the standby state above the intermediate pile in the standby state Stop the movement of the leader at a certain position and lower the top pile of the leader The lower end of the top pile on the leader side is screwed to the upper end of the pile exposed from the ground surface of the intermediate pile, and then the top pile of the leader is raised to connect the top pile and the intermediate pile Raise the lower end from the ground to a predetermined height, remove the tip cap of the lower end of the intermediate pile, turn the leader from the waiting area to the landing area, and move the leader at the upper position of the lowermost pile previously driven Then, lower the connected pile on the leader side and screw the upper end of the lowermost pile exposed from the ground surface in the middle of ground placement and the lower end of the connected pile into a long material state Then, operate the rotating part and the lifting device, drive this long pile downward, move the tool at the lower end of the lowermost pile at a predetermined ground depth, and carry out the required work. After completion of the above-mentioned D process, raise the long pile and lower its lower pile Stop the rise of the long material at the pile position where the upper end of the pile becomes a predetermined height from the ground surface, and unscrew the upper end of the lowermost pile and the lower end of the intermediate pile above it at this stop position After the length pile is disassembled into two and the top pile and the middle pile are connected to the leader, the leader is pivoted to the standby surface area, and the tip cap is attached to the lower end of the middle pile at a predetermined position in this area. After the pile is sunk into the ground until the upper end of the pile reaches a predetermined height from the ground surface, the middle pile is unscrewed by screwing the upper end of the middle pile and the lower end of the top pile and the ground of the waiting ground surface area Intermediate pile standby operation process F: Move the leader to the driving ground surface area after leaving E, stop the movement of the leader above the lowermost pile being driven, which is left in the driving ground surface area after the E stroke. Lower the top pile remaining in the leader, lift the bottom of the top pile and drive it to the ground Screw the top end of the lowermost piles out and connect them, and then move the uppermost pile up to raise the lowermost pile driven into the ground to the ground, and give the leader the uppermost pile and the lowermost stage Driving position change process G to move the leader to the next long pile driving position of the driving ground surface area in the state of being connected to the pile: G next leader driving position of the pile driving ground surface area in the F process After moving to the above, repeat the above steps C, D, E, and F, and complete and complete the necessary long pile driving operation of the driving ground surface section at the stopping position of the pile driving machine, When the pile driving operation at the stopping position is completed, and if there is a pile driving operation at another place, the pile driving machine is moved to the other place, and the strokes A to G are performed. If the entire pile driving operation is completed, the operation will be completed. 2) The intermediate pile standby stroke of stroke A of the above 1) was attached to the leader After screwing and connecting the upper end of the intermediate pile to the lower end of the upper pile, install a tip cap for preventing soil entry at the lower end of the intermediate pile, then move the leader to the pile embedding position on the waiting surface, and then operate the lifting device The ground of the long pile described in the above 1), wherein the middle pile is lowered and the middle pile is embedded in the ground of the waiting area so that the upper end of the middle pile remains at a predetermined height from the ground. Driving method 3) In the intermediate pile standby stroke A and intermediate pile standby operation stroke E, after the intermediate pile is vertically embedded in the ground surface of the standby ground surface area, the intermediate pile is prevented from settling at a position contacting the ground surface of the intermediate pile. It is in the ground driving method of the long pile as described in said 1) or 2) which detachably attaches a stopper board.

  According to the present invention, if the height of the leader of the pile driving machine is the sum of the lengths of the longest lower piles to the length of the uppermost pile attached to the leader, The leader of the pile driving machine is able to work by driving it to the ground improvement depth of the length of the long pile connected with the lower pile and the height of the leader can be lower than the ground driving depth. The stability and safety of the pile driver can be increased because it can be considerably lower than the conventional leader length (height) and the leader does not need to install multiple long piles in parallel. Also, because the movement of the leader is small, the pile can be driven safely and accurately.

FIG. 1 is a side view showing a pile driving machine used in the embodiment. FIG. 2: is explanatory drawing which shows the ground improvement work state seen from the upper direction of the Example. FIG. 3: is explanatory drawing which shows the structure of the reader lower part and rotation part of the pile driving machine of an Example. FIG. 4 is an explanatory view showing an example of the underground piling state of the intermediate pile in the intermediate pile standby process. FIG. 5 is an explanatory view showing a work process of the present embodiment. FIG. 6 is an explanatory view showing a work process of the present embodiment. FIG. 7 is an explanatory view showing a work process of the present embodiment. FIG. 8 is a time-series diagram of the depth of ground improvement of the embodiment. FIG. 9 is a flow chart of the work process of the embodiment. FIG. 10 is a flow chart of the work process of the embodiment. FIG. 11 is an explanatory view showing a swing state of the upper part of the leader of the conventional pile driving machine.

The intermediate pile standby process of the present invention is first prepared by drilling a pile receiving hole capable of accommodating the intermediate pile in the standby ground surface area, and the intermediate pile having the tip cap for preventing intrusion of soil at the lower end of the intermediate pile is prepared there. You may insert it. This drilling may be done first as a separate stroke with a drilling machine. Also, a cylinder for facilitating the insertion of the intermediate pile into the drilled hole may be inserted as shown in FIG. 4 (b).
Alternatively, connect this pile to the uppermost pile attached to the leader, and attach a drilling tool that can also drill using the tip cap for preventing sand and sand entry, rotate the intermediate pile while lowering, and drill the ground There is a method (see (a) type in FIG. 4) for burying the middle pile in it.

  The ground surface within the range where the leader of the pile driver can turn can be used as the standby ground surface area for placing the intermediate pile of the present invention in the semi-embedded state in the ground. You may select the surface of the non-working site where drilling is easy to be adjacent to it, or it may be set in the non-working area where pile driving work is not being done, within the surface of the landing site where you plan to drive piles. .

In addition, in the case of soft ground where the bearing capacity of the ground is weak after the intermediate pile is buried in the ground of the waiting area section, the intermediate pile may sink further under its own weight, so the position exposed from the ground of the intermediate pile A stopper board to reduce the sedimentation of the intermediate pile.
Also, the insertion position of the intermediate pile may be a drilling or a cylinder at the same position, or may be embedded at another position.
A part of each process of the present invention can be included in another process, or a partial order can be changed, but if substantially the same, it is included in the present invention.

  The embodiment of the present invention shown in FIGS. 1 to 9 will be described based on the drawings.

Reference numerals in the drawings of the embodiments of FIGS. 1 to 9 will be described.
In the figure, 1 is a well-known pile driving machine that is often used in pile driving work of civil engineering, 10 to 15 are components of the same pile driving machine 1, 10 is a crawler, 11 is a frame of the crawler , 12 ₁ and 12 ₂ are booms mounted on the same, and 13 ₁ , 13 ₂ and 13 ₃ move the booms 12 ₁ and 12 ₂ so as to move up and down (extend and retract). For the hydraulic cylinder, 14 is attached to the boom 12 ₁ , 12 ₂ tip and the tip of the hydraulic cylinder 13 ₃ and the leader mounting board for holding the leader 15 vertically, 15 is the leader for driving a pile The height is H ₁ , which is much lower than the height H _{0 of} the long material driving leader connecting A pile, B pile and C pile. 15 ₁ leader support base 1m height provided in the lower part of the leader 15 ₂ lower pile receiving peg provided in the leader support table 15 _1, 15 ₃ grips the C pile the uppermost pile rotation unit which can rotate, 15 ₄ is a guide rail provided in the vertical direction of the reader 15, the rotating portion 15 ₃ at the lifting device for lifting and lowering the tension to a chain between the upper and lower leader 15 (not shown) It is possible to move in the vertical direction. Reference numeral 16 denotes a driver's cab of the pile driving machine 1. Moreover, 15 ₅ so that in Swivel mounted to the upper end of the uppermost pile (C pile) 19, Okurikomeru a soil improvement material.

In the figure, 17 is the lowest pile (also referred to as A pile), 18 is the middle pile (also referred to as B pile), 19 is the uppermost pile (also referred to as C pile), and 20 is the lowest pile (A pile) and the middle. It is a long pile in the state of maximum length which connected the pile (B pile) and the top step pile (C pile). 21 is a mixing agitator provided at the lower end of the A pile 17 of the lowermost pile, which is a ground improvement material (cement) sent through the inside of the C pile 19, B pile 18 and A pile 17 through the swivel 15 ₅ It has a pouring hole (not shown) which can pour out system hardening material) into the ground. 22 is a tip cap for preventing entry of dirt at the lower end of the B pile 18; 23 is a stopper board detachably attached to the B pile 18 for preventing downward sedimentation at the embedding position of the B pile 18 at the waiting surface area; , 24 is a cylinder inserted into the underground drilling of the waiting area surface area for accommodating the B pile 18 of the intermediate pile in the state of being buried in the ground and facilitating the entrance and exit of the B pile 18, 25 is an intermediate pile Borehole 18 is attached to the lower end of B pile 18 in a detachable manner and has a tip cap function for preventing earth and sand entry, 30 is a pile driving surface area for ground improvement of soft ground, 31 is a pile driving machine 1 It is a standby ground surface area which is set on the ground surface which does not disturb the work which is within the turning range of the leader 15 and which is not the driving ground surface area 30.

  Each process of this embodiment will be described.

(Step A: Intermediate pile standby stroke / see Fig. 1, Fig. 2 and Fig. 4)
The pile driving machine 1 is moved and stopped near the driving ground surface area 30 where ground improvement is to be performed. At this stopping position, the driving station is stopped at a position where it can be piled at a plurality of pile driving positions of a plurality of columns and rows while being separated for a fixed interval of the landing site 30. An iron plate or the like is laid on the surface of the pile driving machine 1 on which the crawler 10 is mounted, and the machine is stopped to prevent inclination, settling, and instability of the machine body.

After stopping, to grip the first C pile (top pile) 19 to the rotating portion 15 ₃ at a position closer to the surface by lowering the rotating portion 15 ₃ of the reader 15.
And, in the turning range of the leader 15 of the pile driving machine 1 at this stopping position, the ground surface which is not the ground surface area 30 and which does not disturb the turning or movement of the leader (non-driven ground surface or undriven ground surface Set up a standby ground surface area 31 for embedding B pile (intermediate pile) in the ground), drill holes in this area and insert the cylinder 24 to facilitate storage of the B pile (intermediate pile) 18 There is. The bottom end of the B pile (intermediate pile) 18 is inserted in a state in which the tip cap 22 for preventing intrusion of soil is detachably attached. If this ground is a soft ground and the supporting force is weak, the stopper board 23 is detachably attached to the ground surface position of the B pile 18 so as to be placed on the ground surface, and the sedimentation of the B pile 18 into the ground is prevented. To insert the B pile (intermediate pile) 18, move the C pile (uppermost pile) 19 attached to the leader 15 downward to connect the B pile (intermediate pile) 18 on the surface, and then the cylinder Move the leader upward to lower the C pile 19 at the upper position of the cylinder 24 and insert the lower B pile 18 into the cylinder 24 so that the B pile 18 and the C pile 19 Can be done by the process of separating the Alternatively, the B pile 18 can be inserted into the cylinder 24 by another cargo handling machine manually.
The height of the protrusion from the ground surface of the upper end of the B pile 18 is such that the screw can be connected to the lower end of the C pile 19 at the lowermost position of the leader 15. Then, after the B pile 18 is inserted, screwing of the B pile 18 and the C pile 19 is released and separated.

  Apart from the above-mentioned procedure, in order to place the B pile 18 in the first place in the ground, the cylinder 24 is not inserted into the hole as in the (ii) type of FIG. B) Attach the drilling tool 25 which doubles as the tip cap 22 for preventing intrusion of soil at the lower end of the B pile 18 as in the type B, drill the standby surface area 31 with the B pile 18 using the leader of the pile driving machine 1 After drilling, the C pile 19 and the B pile 18 can be unscrewed and separated, leaving the B pile 18 as it is, and the stopper board 23 can be attached and put on standby as required (see FIG. 5 1 to 4)). This method is employed in the embodiments shown in FIGS. The drilling device 25 is attached when the ground is hard, and in the case of a soft ground, the tip cap 22 is attached.

(Step B: Bottom pile connection stroke / See circle 5 in Figure 1 and Figure 5)
In order to attach the A pile 17 to the leader 15 first, raise the C pile (top pile) 19 attached to the leader 15 high, and lift the A pile (bottom pile) 17 temporarily placed using a crane machine etc. Te, screwed connected to the lower end of the C pile (top pile) 19 attached to the rotating portion 15 ₃ of the reader 15 (see circle 5 in FIG. 5). Further, the mixing agitator 21 is attached to the lower end of the A pile 17. Via Swivel 15 ₅ on top of the C pile 19 connects the soil improvement material injection hose 15 _6, soil improvement material so as to be fed to the mixing agitator via the A, inner channel C pile (Figure omitted) There is. Thereafter, an operation for screwing or separating the A pile 17 to the C pile 19 or the B pile 18 is performed at a position close to the ground surface.
Thereafter, the leader 15 is moved to the upper position of the pile driving of the driving ground surface area 30.
The height of the leader of the pile driving machine 1 at this time may be slightly higher than the lengths of the A pile 17 and the C pile 19. A, B, the height H ₁ of from reader 15 (the length of the H ₀ of FIG. 1) the length of the long pile 20 linked all C pile can considerably low.

(C stroke: Bottom pile driving stroke / see circle 1 in Figure 1 and Figure 5)
To C pile (top pile) 19 of the leader 15 in a state attached to A pile (bottom piles) 17, after pivoting moves the reader 15 to the piling position of the hammering surface-ku, activates the rotating portion 15 ₃ Operate the lifting device while As a result, the A pile 17 rotates and descends while drilling the ground with the mixing agitator 21 at its lower end. The soil improvement material feed through the Swivel 15 _5, the A pile 17 while Note out of the mixing agitator 21 were mixed by stirring falling time and soil and soil improvement agent ground in ascent, the ground as the length of the A pile Improve (see circle 6 in FIG. 5).
After completion of this improvement work, when the upper end of C pile 19 of A pile 17 and C pile 19 becomes a predetermined height from the ground surface, the connection pile is stopped, and A pile 17 and C pile 19 Disconnect and separate the screw connection. The A pile 17 is left with its upper end exposed at a predetermined height from the ground surface.

(D stroke: Long pile driving operation stroke)
The A pile 17 is separated and left in the ground, the leader 15 and the C pile 19 attached thereto are pivoted to the waiting ground surface area 31 and positioned above the B pile 18 embedded in the ground, C pile 19 Is lowered, and the upper end of the B pile 18 exposed near the ground surface and the lower end of the C pile 19 are screwed together and connected. Then, C pile 19 is raised about the length of B pile 18, and the drilling device 25 attached to the lower end of B pile 18 is removed.
Thereafter, the connection pile of the C pile 19 and the B pile 18 of the leader 15 is pivoted to the surface of the driving ground, and the position of the A pile 17 left in the ground in this area is left.
At this position, lower the connection pile of C pile 19 and B pile 18, screw and connect the upper end of A pile 17 left in the ground to the lower end of B pile 18, A, B, It is assumed that a long pile 20 in which C piles are connected.
This and the rotating portion 15 ₃ to operate the lifting device as long piles 20, while injecting the rotating and vertically and soil improvement material mixing agitator 21 at the lower end of the A pile 17 may a modifying material and soil of the ground Mix and stir. This ground improvement can be ground improvement to the ground depth about the total length of the length of A pile 17 and B pile 18 near the length of long pile 20 (circle 10, circle 11, circle 12 in FIG. 6) See Figure 8).

(E process: Intermediate pile standby work process)
When the D stroke is completed, the long piles 20 of the A, B, and C piles are raised, and pulled up until the upper end of the A piles 17 reaches a predetermined height on the ground. With the C screw 19 and B screw 18 connected to the leader 15, the leader 15 is moved to the standby surface area 31 and the driller 25 is attached to the lower end of the B gear 18 while the C screw 19 and B screw 18 are connected. Drill down the ground in the waiting area surface area 31 and insert the B pile 18 into the ground until the upper end remains at a predetermined height on the ground, and then screw the B pile 18 and the C pile 17 Disassemble and leave B pile 18 in the ground. Thereafter, the leader 15 is pivoted to the surface of the strike site (refer to circle 13, circle 14, circle 15, circle 16 in FIG. 7).

(F-stroke: Drive position change process)
The C pile 19 remaining in the leader 15 is pivoted to the upper position of the A pile 17 left in the ground of the driving ground surface area 30, and the lower end of the C pile 19 is lowered to be left in the ground The upper end of the A pile 17 is screwed into a connection pile of the A and C piles, and the A and C piles are raised along the leader 15 so that the lower end of the A pile is on the ground. Thereafter, the leader 15 is moved to the upper side of the next driving position, and is lowered while rotating the connecting piles of the A and C piles to perform ground improvement at the next position. That is, it returns to the lowermost-stage pile driving process of the C process (refer to circle 17 and circle 18 in FIG. 7).

(G stroke)
Thereafter, return to C, D, E, and F strokes, change the next drive position, and perform ground improvement work with the length of the long pile 20 connected with A, B, and C piles. . Ground improvement at the position that can not be driven by the pile driving machine 1 changes the stopping position using the crawler 10 of the pile driving machine 1, and the waiting ground surface area of the driving ground surface area and the B pile 31 in the next ground improvement zone In the same manner, if the ground is improved, a wide range of ground improvement can be efficiently performed by the low leader 15.

Thus, in the present embodiment, ground improvement longer than the height of the leader can be performed. The leader is stable and can drive a long pile.
In addition, both A pile and B pile can work.
Furthermore, since the separation and connection work of screwing between A pile 17 and B pile 18 and B pile 18 and C pile 19 can be performed at a low position on the ground surface, pile connection and separation work can be performed quickly and safely. .

  The present invention can be used not only for ground improvement work, but also for soil collection for geological surveys, work of putting steel pipes into the ground, and the like.

DESCRIPTION OF SYMBOLS 1 pile driving machine 10 crawler 11 swivel stand 12 ₁ , 12 ₂ boom 13 ₁ , 13 ₂ , 13 ₃ hydraulic cylinder 14 leader mounting substrate 15 leader 15 ₁ leader support base 15 ₂ lower pile receiving part 15 ₃ rotation part 15 ₄ guide Rail 15 ₅ swivel 15 ₆ ground improvement injection hose 16 cab 17 A pile (lowermost pile)
18 B pile (intermediate pile)
19 C pile (uppermost pile)
Reference Signs List 20 long pile 21 mixing stirrer 22 tip cap for preventing entry of soil 23 stopper board 24 cylinder 25 drilling machine 30 penetration surface area 31 standby surface area

Claims (3)

A method of driving a long pile for driving a long pile into the ground using a pile driving machine, wherein the long pile is composed of three or more of an uppermost pile, a lowermost pile, and an intermediate pile in between. A plurality of piles are formed by screwing together at upper and lower ends, and the threaded portion of the lower end of the top pile of the long pile is screwed with the upper end of the other lower pile of the long pile The pile driving machine mounts a vertical leader at the tip of a retractable and extendable boom mounted on the crawler car's swivel base, and the pile up and down on the same leader. A rotary unit is mounted for free movement and capable of holding and rotating the middle of the top pile of the long pile so as to move up and down along the leader, and to move the same up and down along the leader Is provided with a lifting and lowering device to vertically Reader can move from parked position of Kuida driving tool in a predetermined range, and has a lifting device and Uchikomeru the pile attached to the leader in the operation of the rotating portion in the ground giving rotation and pushing force function,
A long pile is driven into the ground in the following steps A to G using the pile driving machine, a plurality of piles which can be made into a long pile when connected, and equipment necessary for the driving operation, Ground driving method for long piles.
Note A: The same pile driving machine stopped by moving the pile driving machine by a crawler to a ground position where pile driving work can be performed near the surface area where the long material will be driven toward the ground and the pile driving machine stopped. The top of the pile that makes up the long material is held by the rotating part in the leader of the pile, and then the standby ground surface area is set on the ground surface that does not interfere with pile driving within the range where the leader of the pile driving machine can turn. After attaching the tip cap for earth and sand entry prevention to the lower end of the intermediate pile in the same standby area surface area, the upper end of the intermediate pile has a height that can be connected with the uppermost pile as a lower position in the leader. Intermediate pile standby stroke to vertically insert the intermediate pile into the ground of the
B: Using a crane, move the bottom pile of the long pile below the top pile of the long pile held by the rotating part of the leader of the pile driving machine, and screw them together The lower stage pile connection stroke where the equipment necessary for the required work in the ground is attached to the lower end of the lowermost pile and the leader is moved to the ground position of the predetermined driving of the driving ground surface section.
C: Operate the rotating part and the lifting device at the pile driving position of the driving ground surface section, lower the connected pile of the top and bottom piles, and drive the lowest pile into the ground, The rotating part and the lifting device are stopped at a position where the upper end is at a predetermined height from the ground surface, and the upper end of the lowermost pile and the lower end of the uppermost pile are unscrewed and connected The lowest pile driving process to move the leader to the standby surface area by separating the piles and leaving the lowest pile in the ground filling condition.
D: The leader is pivoted to the standby ground area in the C process, and the movement of the leader is stopped at the position above the intermediate pile in the standby state in which the top pile of the leader is embedded, and the top pile of the leader is lowered. The lower end of the top pile on the leader side is screwed to the upper end of the pile exposed from the ground surface of the intermediate pile being embedded, and then the top pile of the leader is raised to form the top pile and the middle pile Lower the lower end of the connection pile from the ground to a predetermined height, remove the tip cap from the lower end of the intermediate pile, turn the leader from the standby ground area to the strike ground section, and position the lower pile above it Stop the movement of the leader, and then lower the connecting pile on the leader side to screw the upper end of the lowermost pile exposed from the ground surface in the middle of the ground placement and the lower end of the connecting pile, State of the material and then make the rotating part and the lifting device And, by moving the instrument of the lower end of the lowermost pile by implanting the elongated pile downwards at a predetermined ground depth, long pile hammering working stroke to provide the required work.
E: After completion of the above-mentioned D process, the long pile is raised and the long material stops stopping at the pile position where the upper end of the lowermost pile is at a predetermined height from the ground surface, Disengage the screw connection between the upper end of the lower pile and the lower end of the middle pile above it, disassemble the long pile into two, and connect the top pile and the middle pile to the leader and move the leader to the waiting surface area After attaching the tip cap to the lower end of the intermediate pile at a predetermined position in this area and sinking the intermediate pile to the ground until the upper end of the pile is at a predetermined height from the ground surface, the upper end of the intermediate pile Intermediate pile standby work stroke to unscrew the lower end of the top pile and leave the intermediate pile in the ground of the standby land surface area and turn the leader to the strike surface section.
F: After the E process, the movement of the leader is stopped above the lowermost pile during implantation, remaining in the surface of the drilled land, and the uppermost pile remaining in the leader is lowered, and the lower end of the uppermost pile Screw in the upper end of the lowermost pile exposed to the ground surface by lifting it up and driving it, and then move the uppermost pile up to raise the lowermost pile piled into the ground to the ground surface In the state where the top pile and the bottom pile are connected to the leader, the driving position changing stroke for moving the leader to the driving position of the next long pile of the driving ground surface section.
G: After moving the leader to the next drive position of the pile drive surface area in the F process, repeat the above steps C, D, E and F, and then hit the surface of the drive surface at the stop position of the pile drive machine Complete and complete the necessary long pile driving work of the district, and complete the pile driving work at that stopping position, and if there is a pile driving work at another place of the pile driving machine, pile The driving machine is moved to the other place, and the above steps A to G are repeated, and when all the piling work is completed, the work is completed.   After the intermediate pile standby process of the process A according to claim 1 screw-connects the upper end of the intermediate pile to the lower end of the uppermost pile attached to the leader, a tip cap for preventing earth and sand entry is installed at the lower end of the intermediate pile, Move the leader to the pile loading position on the standby surface, then operate the lifting device to lower the top pile and place the intermediate pile in the ground of the standby surface so that the upper end of the pile remains above the ground surface. The ground driving method of a long pile according to claim 1, wherein the ground is embedded and made to stand by. After the intermediate pile is embedded vertically on the surface of the waiting area surface area in the intermediate pile standby stroke A and the intermediate pile standby work stroke E, the stopper pile which prevents the sedimentation of the intermediate pile can be freely removed at the position of the intermediate pile contacting the ground The ground driving method of the long pile of Claim 1 or 2 attached to these.

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