JPH06322763A - Pile holding method holding pile buried rotatively into ground in suspended state - Google Patents

Abstract

PURPOSE:To apply a heavy machine used to rotate and drive a pile into a pile insertion hole efficiently and enhance the efficiency of pile rotating and driving work and reduce the execution cost as well. CONSTITUTION:The head 7a of a pile 7 is chucked at the lower end of a rod main body 6 which is removably connected to an auger motor 10 of a heavy machine and suspended. A pile insertion rod 2 is rotated by the auger motor 10, thereby rotating and driving the pile into the pile insertion hole. After the lower end part 55 of the pile is inserted to a specified position of a foot protection part 56, the pipe insertion rod 2 is held with a holding tool 5 in a suspended state for a specified time. Then, the rod main body 6 is removed from the auger motor 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to mount a pile in a pile insertion hole formed in a construction ground by rotation so that the lower end of the pile is inserted into a required position of a root consolidation portion, and then the pile head is fixed to a predetermined position. The present invention relates to a pile holding method for holding a pile in a required suspended state until it becomes a state.

[0002]

2. Description of the Related Art When a pile is to be rotationally buried in a pile insertion hole formed in the construction ground, after the bottom end of the pile is inserted at the required position of the root consolidation part built at the lower end of the pile insertion hole, the pile head is moved to a predetermined position. It is necessary to hold the pile in a suspended state until it is fixed in the position (that is, until the lower end portion of the pile is fixed to the root consolidation portion as required).

Conventionally, this holding has been performed using a heavy machine a shown in FIG. The outline of the construction of the heavy machine and the procedure for holding the pile by the heavy machine will be described below.

That is, the heavy machine a is provided with an auger motor d which is suspended from a wire c and moves up and down on a pillar member b having a high height which is erected on the ground, and a rotary shaft of the auger motor d is provided with
It is possible to selectively connect a drilling rod for excavating a pile insertion hole or a pile insertion rod for rotating and embedding a pile, and it is possible to perform both the work for excavating a pile insertion hole and the work for revolving a pile by properly using both rods. It is a thing.

The pile insertion rod e has its upper end connected to the auger motor d and its lower end has a pile f.
It has a cap g for chucking the head f1. As shown in FIG. 17, the cap g has a cylindrical shape with a downward opening into which the pile head f1 can be inserted, and a lateral opening i is continuously provided at the upper end of the vertical opening h on the peripheral surface thereof. An L-shaped locking opening j is provided.

Then, by inserting the pile head into the cap g,
A locking pin k projecting outward at the upper end of the pile head f1 is located at the upper end of the vertical opening h, and the cap g
Is rotated in the forward direction F1 so that the locking pin k is moved to the lateral opening i.
And the pile head f1 is chucked. On the contrary, when the cap g is rotated in the reverse direction F2, the locking pin k is disengaged from the lateral opening i, and the pile head f1 is released.
The chuck state of is released.

However, when the pile head f1 is chucked to the cap g at the lower end of the pile insertion rod connected to the auger motor d and then the auger motor d is lowered while being rotated in the forward direction F1, the pile f is rotatably buried. The lower end of the pile f
2 is inserted into a required position of the root consolidation portion m.

After that, for the purpose of fixing the lower end portion f2 of the pile to the consolidation portion m, the pile was held as it is by the heavy machine for the required time.

[0009]

However, when the piles are held by using the heavy equipment in this way, there is a problem that the accuracy of burying the piles is poor, and the heavy equipment cannot be efficiently utilized. It was That is,

Problems regarding construction accuracy The time for holding a pile in which the lower end of the pile is inserted in the root consolidation part until the pile head is fixed in the required position must be set according to the ground condition. . However, in the past, since the heavy machinery itself used for excavating the pile insertion hole and rotating burial of the pile was used for holding the pile, the operating time of the heavy machinery is expensive. Is usually set to about 20 minutes (the time when it was empirically thought that tentative pile fixing could be achieved), and after this time, the cap was removed from the pile head by the reverse rotation of the auger motor. . Therefore, depending on the ground condition, there were cases where piles could be firmly anchored, but in some cases the piles subsequently settled due to their own weight, and the pile head positions of the buried piles could not be aligned accurately. There were many.

By the way, when the cap that chucks the pile head is exposed on the ground surface when the pile is finally buried,
By visually observing the position of the locking pin in the lateral opening, the chuck release timing could be estimated for the time being. That is, FIG.
As shown in Fig. 7, if the locking pin k was in contact with the lower edge n of the lateral opening, it could be inferred that the pile was suspended from the cap and the fixing was incomplete. On the contrary, if the locking pin k is in contact with the upper edge o of the lateral opening as shown by the alternate long and short dash line in FIG. 17, the pile is not in a state of being suspended from the cap, and therefore even if the chuck is released. I was able to get an idea if there was no problem.

However, when the cap is hidden in the pile insertion hole as shown in FIG. 17 in the final buried state of the pile, the position of the locking pin in the lateral opening cannot even be visually observed. I had to decide when to release the chuck. Therefore, when the cap was pulled up with the intention of releasing the chuck, the stakes could be pulled up in the worst case.

If the pile head position is not set as designed, after cutting the ground, piles higher than the design need to be cut, and conversely lower piles are reinforced with reinforcing bars to build an expensive footing. There was a significant uneconomical situation such as having to do it.

Problems in Utilization Efficiency of Heavy Equipment As described above, it takes a relatively long time of about 20 minutes to hold a pile by a heavy equipment. If it can be utilized for excavation and rotary burying of piles, the utilization efficiency of heavy equipment (including its operator) can be improved and the construction cost can be reduced by that much. There was a lot of room for improvement in terms of construction cost.

An object of the present invention is to provide a holding device for a rotary buried pile which can solve the above problems.

[0016]

To solve the above problems, the present invention employs the following means.

That is, the pile holding method according to the present invention has a pile inserting rod which has a chuck device 8 at a lower end of a rod body 6 which is detachably connected to an auger motor 10 of a heavy machine and which is rotated around a vertical axis. 2, after the head 7a of the pile 7 is chucked to the chuck device 8, the pile is rotated by the rotation of the pile insertion rod 2 by the auger motor 10 and the pile is buried in the pile insertion hole of the construction ground to insert the pile. The lower end portion 55 of the pile is put in the required position of the root consolidation portion 56 built at the lower end of the hole, and then the pile insertion rod 2 is suspended by the holder 5 installed on the ground directly or through another member. Hold the pile in the lower state, and then cut off the upper end of the pile insertion rod from the auger motor 10 and hold the pile until the head 7a of the pile 7 is fixed at a predetermined position.
Is separated from the pile insertion rod 2.

In the above pile holding method, the pile insertion rod 2
Is held by holding the rod body 6 with the holder 5. In the case where the chuck device 8 includes a cap C having a cylindrical shape that is open downward so that the head 7a of the pile can be inserted, the lower end 89 of the cap C that chucks the head 7a of the pile.
Is supported by the holder 5.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

First Embodiment FIGS. 1 and 2 illustrate a holding device used in the present invention, and the holding device 1 comprises a pile insertion rod 2, a pedestal 3, a support 4, and a holder 5. .

The pile insertion rod 2 is, as shown in FIG. 1, a chuck device for chucking the head 7a of the pile 7 to the lower end of a rod body 6 having a circular shaft shape (in this embodiment, the same as shown in FIG. 16). 8) provided with a cap C having the above-mentioned structure, and the upper end portion 2a thereof is detachably connected to an auger motor 10 of a heavy machine by a known connecting device 9 to rotate around a vertical axis line. It is supposed to be rotatable.

The pedestal 3 has a rectangular frame 1 as shown in FIG.
1 is formed by projecting pedestal pieces 12 and 12 in parallel at both ends of one side face, and the pedestal pieces 12 and 12 open the opening end 15 of the pile insertion hole 13 provided in the ground, It is installed around the edge.

As shown in FIG. 2, the support base 5 has support pieces 17, 17 provided in parallel on both ends of one side surface of the rectangular frame 16, and the base piece and the pedestal piece are located near the tip end. 12 and 12 are mounted.

The holder 5 is, as shown in FIGS.
An open / close type in which one ends of the half-split tube portions 20 and 21 are pivotally attached to each other in an openable and closable manner, and the other ends of the half split tube portions 20 and 21 are detachably connectable to each other. In the state, the enclosure 22 into which the rod body 6 is inserted is configured.

One half-split tube portion 20 is provided with flange portions 25 and 26 in the circumferential direction at the upper and lower end portions of the outer surface portion of the half-split arc piece 23.
It will be projected. The other half-divided cylinder portion 21 has the same structure, and is provided with flange portions 29 and 30 projecting in the circumferential direction thereof close to the upper and lower ends of the outer surface portion of the half-divided arc piece 27.

Then, in a state in which the one end side portions 31 and 32 of the upper and lower flange portions of the one half-split tube portion 20 overlap the outer sides of the one end side portions 33 and 35 of the upper and lower flange portions of the other half split tube portion 21. , One end portions of both half-divided cylinder portions 20 and 21 are fitted to each other, and the upper and lower overlapping portions 36 and 37 can be opened and closed by a pivot shaft 39 which is inserted through a shaft hole having a common hole center. Is pivotally attached to.

Further, the other end side portions 40 and 41 of the upper and lower flange portions of the one half-split cylinder portion 20 overlap the outsides of the other end portion portions 42 and 43 of the upper and lower flange portions of the other half split cylinder portion 21. In this state, the other end portions of the two half-divided cylinder portions 20 and 21 are fitted to each other, and the handle 51 is inserted into the insertion holes 47, 48, 49 and 50 having common hole centers provided in the upper and lower overlapping portions 45 and 46. By connecting the connecting shaft 52 having the above-mentioned shape so that it can be detachably inserted, the other end portions of the half-divided cylinder portions 20 and 21 are detachably connected to each other (FIG. 3), whereby the rod body 6 can be inserted. 22 is configured.

Further, three pressing bolts 53, 53, 53 are screwed into the upper and lower central portions of the wall portion of the enclosure 22 (the upper and lower central portions of the half arc piece) at an angular pitch of 120 degrees. .
In the present embodiment, one pressing bolt 53 is screwed into the one half-split cylinder portion 20 and the other half-split cylinder portion 21.
Two pressing bolts 53, 53 are screwed onto each other.

However, the pile insertion hole 13 formed in the construction ground
In order to hold the pile 7 in which the lower end portion 55 is inserted in the root consolidation portion 56 at a required position by rotation and is held in that state by using the holding device 1 according to the present embodiment, the holding tool 5 is attached to the pedestal 3. It is installed on the ground via the support base 4.

That is, the pedestal 3 is replaced by a pair of pedestal pieces 12, 12
Is placed around the pile insertion hole 13 so that the open end 15 of the pile insertion hole 13 is sandwiched between the pile insertion hole 13 and the support base 4, and the pair of support pieces 17, 17 sandwiches the rod body 6 so that And, in a state of being substantially orthogonal to the pedestal pieces 12, 12, or in a slightly inclined state,
The pedestal pieces 12, 12 at the base end portion and the tip end portion
Place on.

After that, as shown in FIGS. 5 and 6, after the two open half cylinder parts 20 and 21 are closed so that they surround the rod body 6 in the circumferential direction, the other half parts of the half cylinder parts are joined together. Are connected by the connecting shaft 52 to form the enclosure 22. The enclosure 2
2 is placed on the support pieces 17, 17 and then the pressing bolts 53,
When 53, 53 are tightened, the enclosure 22 and the rod body 6 are integrated by the frictional force caused by the bolt tip portions 57, 57, 57 protruding into the enclosure pressing the peripheral surface portion 59 of the rod body 6, The pile 7 is held in a suspended state.

After holding the piles in this way, the connected state of the connecting device 9 is released, and the pile insertion rod 2 is separated from the auger motor 10 as shown in FIG.

Second Embodiment FIG. 7 shows an engaging recess 60 at a required portion of the peripheral surface of the rod body 6.
FIG. 6 shows another embodiment of the present invention in which a detachable holder is used in place of the opening / closing holder when the pile insertion rod 2 having the above structure is used. An example of the separation-type holder will be described with reference to FIGS.

The detachable holder 5 comprises a pair of half-split cylinder portions 65 and 66 in which fixing pieces 62 and 63 are bent outward at both ends of a half-split arc piece 61, and has a curved concave surface. 67,
The fixing piece portions 62, 62, 63, 63 are brought into contact with 67 as the inside, and the bolt 69 is inserted through the insertion hole having a common hole center provided in the fixing piece portion in the corresponding contact state, and the nut 7 is inserted therein.
The enclosure 71 into which the rod body 6 can be inserted can be formed by screwing 0 and tightening.

A bearing bolt 72 is screwed into the central portion of the peripheral surface of one half-split cylinder portion 65, and
Bearing bolts 72, 72 are respectively screwed onto the upper and lower central portions of the peripheral surface of the other half-divided cylinder portion 66, and three bearing bolts 72, 72 are attached to the wall portion 73 of the enclosure 71. 7
2, 72 are screwed together at an angular pitch of 120 degrees.

The tip portion of the bearing bolt projecting toward the inner surface of the wall portion is the bearing portion 75. In order to hold the pile using the holding tool 5, for example, as shown in FIG. 7 and FIG. 9, the bearing portion 75 is inserted into the locking recess 60, and the upper surface portion 60a of the locking recess is supported by the bearing portion 75. Support.
Note that, in FIG. 7, the support portions are shown in a facing state for convenience of description. In this case, the support bolt 72 may be tightened. After holding the pile in this way, the connected state of the connecting device 9 is released to disconnect the pile insertion rod 2 from the auger motor 10.

Third Embodiment FIG. 10 shows a structure in which independent locking recesses 60, 60 are provided in the rod body 6.
Targeting the pile insertion rod 2 provided so as to face the peripheral surface part of the fixed support parts 75, 75 projecting on the inner surface side of the openable holder 5 shown in FIG. 60,
FIG. 6 shows another embodiment of the present invention in which the upper surface portions 60a, 60a of the locking recesses are supported by being inserted into the support member 60, thereby holding the pile.

Fourth Embodiment FIG. 12 is intended for a pile insertion rod 2 having a locking projection 80 projecting from the peripheral surface thereof, for example, a wall portion 82 of an enclosure 81 which is formed as a cylindrical integral body. Another embodiment of the present invention is shown in which a holding tool 5 formed by projecting a support portion 75 is used to support the locking projection 80 by the support portion 75 to hold the pile. Incidentally, in the figure, the support portion 75 is configured by a portion on the tip side of the support bolt 72.

Fifth Embodiment FIGS. 13 to 14 show that the vertical pieces 87 of the L-shaped member 86 are welded to the facing portions of the peripheral surface portion of the rod body 6, respectively, and the horizontal pieces 87 protruding from the peripheral surface portion are engaged with the protrusions. For the pile insertion rod 2 which is set to 80, using the support tool 5 which is U-shaped or U-shaped and in which the support portions 83, 83 which support the locking projection 80 are provided so as to face each other, 9 shows another embodiment of the present invention in which the locking projections 80, 80 are supported by the support portions 83, 83. In the figure, one of the support portions 83 is formed as a protrusion and the other is formed as a portion on the tip side of the support bolt 72.

Sixth Embodiment FIG. 15 shows an example of a method of holding a pile 7 when the head 7a of the pile 7 is exposed on the surface of the ground. The lower end 89 of a cap C having a cylindrical shape that opens downward is shown in FIG. The supporting parts 83, 83 of the holder 5 support the opposite side.

[0041]

According to the holding method of the present invention, since the pile insertion rod held in the holding state can be separated from the auger motor through the holder, the heavy equipment is used for excavating the pile insertion hole or It can be efficiently used for the original work such as the rotary burying of piles, and the construction efficiency can be improved and the construction cost can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating a holding method of the present invention.

FIG. 2 is a perspective view illustrating a holding device used in the present invention.

FIG. 3 is a perspective view showing an opening / closing type holder.

FIG. 4 is a perspective view showing a state in which an opening / closing type holder is opened.

FIG. 5 is a plan view illustrating a state in which the enclosure and the rod body are integrated by tightening the pressing bolt when the opening / closing holder is used.

FIG. 6 is an explanatory view for enlarging and explaining a state in which a pile is held by using a holding device.

FIG. 7 is an explanatory view illustrating a method of holding a pile using a support tool in which a support portion is provided on an inner surface side of a wall portion of an enclosure.

FIG. 8 is a perspective view illustrating a separation-type holder.

FIG. 9 is a plan view showing a state in which a pressure bolt is tightened and the enclosure and the rod body are integrated when a separation-type holder is used.

FIG. 10 is an explanatory diagram illustrating a method of holding a pile by a holding device when a pile insertion rod in which locking recesses are provided in opposing portions of a peripheral surface portion of a rod body is used.

11 is an explanatory diagram illustrating an example of a support tool that constitutes the holding device in FIG.

FIG. 12 is a cylindrically-integral structure and has a support portion projecting from the wall when a pile insertion rod having a locking projection projecting from the peripheral surface of the rod body is targeted. It is explanatory drawing explaining the holding method of the pile using a holding tool.

FIG. 13 shows a method for holding a pile using a holder having a U-shaped enclosure when a pile insertion rod having locking projections projecting from the peripheral surface of a rod body is used. It is an explanatory view explaining.

FIG. 14 is an explanatory diagram illustrating a method of holding a pile using a holder including a U-shaped enclosure.

FIG. 15 is an explanatory diagram illustrating an example of a method of holding the pile when the head of the pile is exposed on the ground surface.

FIG. 16 is an explanatory diagram illustrating a conventional method for holding a pile by a heavy machine.

FIG. 17 is an explanatory view illustrating a chuck portion of a pile in holding a conventional pile.

[Explanation of symbols]

 1 Holding Device 2 Pile Inserting Rod 5 Holding Tool 6 Rod Main Body 7 Pile 7a Pile Head 8 Chuck Device 10 Auger Motor 55 Lower Pile 56 Pile Consolidation C Cap

Claims (3)

[Claims] 1. A chuck device 8 is attached to a lower end of a rod body 6 which is detachably connected to an auger motor 10 of a heavy machine.
Of the pile insertion rod 2 which has a vertical axis and is rotated around the vertical axis, after the head 7a of the pile 7 is chucked to the chuck device 8, the pile is rotated by the rotation of the pile insertion rod 2 by the auger motor 10. Embed this in the pile insertion hole of the construction ground,
The lower end portion 55 of the pile is placed in a required position of the root consolidation portion 56 built at the lower end of the pile insertion hole, and thereafter, the pile insertion rod is directly or through another member by the holder 5 installed on the ground. 2 is held in a suspended state, and after that, the upper end of the pile insertion rod is separated from the auger motor 10, and the pile 7 is held until the head 7a of the pile 7 is fixed at a predetermined position. A method of holding a pile, characterized in that the holder 5 is separated from the pile insertion rod 2. 2. The pile holding method according to claim 1, wherein the holding of the pile insertion rod 2 is performed by holding the rod body 6 with a holder 5. 3. When the chucking device 8 comprises a cap C having a cylindrical shape that is open downwardly into which the head 7a of the pile 7 can be inserted, the cap C chucking the head 7a of the pile 7 is provided.
The pile holding method according to claim 1, wherein the lower end 89 of the pile is supported by the holder 5 to hold the pile inserting rod 2.