JP2001064971A - Pile settler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively cancel linkage of a pile settler for controlling the level of a pile head in the ground, from a pile after settling the same. SOLUTION: A bracket 52 is arranged on a lower side surface of a settler main body 42 in a manner superposing on a side surface of a pile-side holding piece 51 upward protruded from a head of a pile 13, and a pin 53 is inserted into the pile-side holding piece 51 and the bracket 52 from the side. A pin pulling mechanism 54 for pulling up the pin 53 from the pile-side holding piece 51 and the bracket 52, is arranged along the settler main body 42 over the almost entire length thereof. The pin pulling mechanism 54 has a guide pipe 55 fixed to a side surface of the settler main body 42, and a linear body 56 extending from the pin 53 through the interior of the guide pipe 55 to an upper portion of the settler main body 42. The guide pipe 55 is formed of a straight pipe 55a extending from an upper portion of the settler main body 42 to a lower portion of the same, and a plurality of bent pipes 55b each being curved into a circular arch from the lower portion of the straight pipe 55a toward the pin 53. The linear body inserted in each bent pipe 55b is formed of a flexible rope 56b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrow octopus for laying a pile, referred to as an yako to be used in a digging method.

[0002]

2. Description of the Related Art FIG. 4 shows a pile self-prevention device, in which a press-fit device 12 which moves up and down around a screw auger 11 for digging is disposed. A chuck mechanism 14 for holding is mounted.

The chuck mechanism 14 has a tubular main body 15 with a double-ended flange, and a pin 16
As a result, the base end of the claw body 17 is rotatably supported by a shaft, and a hydraulic cylinder 20 is attached between the back surface of the claw body 17 and the upper part of the main body 15 by pins 18 and 19.

[0004] At the upper end of the pile 13, a seat plate 21 having a screw hole is integrally provided.
The suspension plate 23 is integrally attached by 22.

When the chuck mechanism 14 directly holds the pile head as shown in FIG. 4, the tip end of the claw body 17 is turned upward by opening and closing the hydraulic cylinder 20 so as to contract. In this state, the suspension plate 23 of the pile 13 is brought into contact with the main body 15 to extend the hydraulic cylinder 20, thereby
The tip of the claw body 17 is rotated downward to grip the suspension plate 23.

FIG. 5 shows that the chuck mechanism 14 uses a conventional pile laying octopus (hereinafter simply referred to as “arrow octopus”) 24 to move the pile 13
In this case, the octopus 24 is attached in advance to the head of the pile 13 laid below the ground 25.

The arrow octopus 24 has a cylindrical arrow octopus main body 26, and a flange 27 gripped by the chuck mechanism 14 is provided at the upper end of the arrow octopus main body 26.
At the lower end, a pile guide rib 28 for positioning that is fitted to the upper end of the pile 13 is provided.

Further, a locking part 29 is attached to the side surface of the arrow octopus main body 26 slightly below the flange 27, and the head of the long bolt 31 is rotatably engaged with the locking part 29, Further, the lower end screw portion 32 of the long bolt 31 is used as the seat plate having the screw hole of the pile 13.
It is screwed into 21 screw holes, and through this long bolt 31, arrow octopus
24 and the pile 13 are integrated.

In order to control the pile head level in the ground when the pile 13 is submerged in the ground by the drilling method using the screw auger 11, an arrow octopus 24 is previously inserted into the screw hole of the seat plate 21 of the pile head. The bolt 13 is screwed in to integrate the pile 13 and the arrow octopus 24, and the arrow octopus 24 is formed on a support layer that supports the lower end of the pile 13 by holding the pile 13 by being gripped by the chuck mechanism 14. After fixation by hardening of the root compaction material of the enlarged bulb part,
On the ground, the long bolt 31 is turned in the loosening direction, the arrow octopus 24 is cut off from the head of the pile 13, and the arrow octopus 24 is pulled out to the ground.

[0010]

The conventional arrow octopus 24 has the following features.
When the screw auger 11 rotates during the digging and digging, a rotational force acts on the pile 13, so that the long bolt 31 is easily bent and deformed, and when the long bolt 31 is loosened, it may be difficult to turn. In this case, there is a problem that it is difficult to remove the arrow octopus 24 from the pile 13.

Further, when the rotational force is large, the long bolt 31 may be threaded. In this case, the pile
The function of holding 13 to prevent self-subsidence is impaired.

Further, even if the long bolt 31 can be turned in the loosening direction, the long bolt 31 is
It is difficult to confirm whether or not the actual deviation has occurred.

For example, as the long bolt 31 is loosened, the gap between the locking portion 29 and the head of the long bolt 31 is enlarged. The stroke of the long bolt 31 should be released from the clearance of the long bolt 31. It is not always clear because there are many cases.

The present invention has been made in view of the above points, and an arrow octopus for pile setting which is connected to a pile head in advance to manage a pile head level in the ground when the pile is laid underground. To
It is an object of the present invention to ensure that the connection from the pile can be released after the anchoring, and that the connection of the arrow octopus for setting the pile can be easily confirmed.

[0015]

According to the first aspect of the present invention, there is provided an arrow octopus body located on the head of a pile submerged in the ground, and a vertical moving means provided at an upper end of the arrow octopus body. A gripped portion to be gripped, level adjusting means provided on an upper side surface of the arrow octopus main body, which is locked on the ground and adjusts a locking level of the arrow octopus main body, and a pile provided on a lower side surface of the arrow octopus main body A coupling part overlapping the side of the coupling partner protruded upward from the head of the pin, a pin inserted from the lateral direction into the coupling partner and the coupling part, and a coupling partner provided substantially over the entire length of the arrowhead body and It is an arrow octopus for pile settling provided with a pin pulling-out mechanism for pulling out a pin from a joint.

[0016] Then, on the ground, the joining portion of the pile laying octopus is overlapped with the joining counterpart of the pile head, and a pin is inserted into these joints from the lateral direction, so that the arrow octopus main body is previously placed on the pile head. Keep connected. Further, by controlling the locking level of the arrow octopus main body by the level adjusting means, the pile head level in the ground when the pile is laid underground is managed. After fixing, pull out the pin from the connection partner and the connection part in the ground by operating the pin pulling mechanism on the ground, release the connection of the arrow octopus to the pile, and pull the arrow octopus to the ground by vertical movement means increase.

According to a second aspect of the present invention, the pin pulling mechanism of the arrow octopus for laying a pile according to the first aspect includes a guide tube fixed to a side surface of the arrow octopus main body and an arrow passing through the guide tube from the pin. And a linear body drawn out to the upper part of the octopus main body.

Then, when the linear body is pulled at the upper part of the arrow octopus main body, the linear body slides in the guide tube, and applies a pulling force to the pin at the lower part of the arrow octopus main body.

According to a third aspect of the present invention, in the arrow octopus for laying a pile according to the second aspect, a plurality of connecting portions and pins are provided on a lower side surface of the arrow octopus main body, and the guide pipe is formed by the arrow octopus main body. A straight pipe disposed from the upper part to the lower part of the pipe, and a plurality of curved pipes that are curved in an arc shape from the lower side of the straight pipe toward the pin, and at least the linear body in each curved pipe is It has flexibility.

Then, by pulling a common linear body in the straight pipe, a plurality of pins are simultaneously pulled out through the flexible linear bodies in a plurality of curved pipes.

According to a fourth aspect of the present invention, in the arrow octopus for laying a pile according to any one of the first to third aspects, the arrow octopus is provided on a side surface of the main body so as to be movable up and down, and a lower end of the arrow octopus. It has a gauge bar to be contacted.

When the connection between the head of the pile and the main body of the arrow octopus is released by pulling out the pin from the mating part and the joint, when the main body of the arrow octopus is pulled up, the gauge rod is moved with respect to the main body of the arrow octopus. Is lowered, the movement is confirmed by checking the movement.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. It should be noted that the pile self-settling prevention device (such as a chuck mechanism) shown in FIG. 4 is similarly used for the pile laying octopus (hereinafter simply referred to as “arrow octopus”) 41 according to the present invention. .

As shown in FIG. 1, an arrow octopus 41 is a steel pipe arrow octopus body connected to the head of a pile 13 submerged in the ground.
It is formed around 42.

A flange 43 is provided at the upper end of the arrow octopus main body 42 as a portion to be gripped by the vertical movement means. The vertical movement means is a press-fitting device 12 (FIG. 4) provided on a guide column of the pile driver so as to be able to move up and down.
The flange 43 is gripped by the chuck mechanism 14 (FIG. 4) provided in.

Further, on the upper side surface of the arrow octopus main body 42, there is provided a level adjusting means 44 which is locked on the ground and adjusts the locking level of the arrow octopus main body 42.

The level adjusting means 44 has a pair of level adjusting plates 45 integrally provided on the outer surface of the arrow octopus main body 42 by welding or the like. These level adjusting plates 45 have a large number of bolt insertion holes in the vertical direction. Each of the bolt insertion holes 46 is selected, and a hydraulic or screw type jack 48 is attached to each level adjusting plate 45 at a predetermined height position by a set bolt 47. Of the lifting rod 49 is locked by a fixing plate 50 installed on the ground 25.

After all, the fixing plate 50 and the jack 4
8, arrow octopus body 4 via set bolt 47, level adjustment plate 45
2 is prevented, and the pile 13 is kept at a certain level in the ground.

Further, on the lower side surface of the arrow octopus main body 42, a connection overlapping on both sides of a pile-side holding piece 51 as a connection partner protruding upward from the threaded seat plate 21 of the head of the pile 13. A bracket 52 as a part is provided by welding, and a pin 53 with a flange is inserted from a lateral direction into a pin insertion hole formed in each of the pile-side holding piece 51 and the bracket 52. A pin pull-out mechanism 54 for pulling out the pin 53 from the pile-side holding piece 51 and the bracket 52 is provided over substantially the entire length of the pin.

The pin withdrawing mechanism 54 has a guide tube 55 fixed to the side surface of the arrow octopus body 42 by welding.
The linear body 56 is drawn out to the upper part of the arrow octopus main body 42 through the inside of the body.

As shown in FIGS. 2 and 3 (a),
A plurality of sets of the bracket 52 and the pins 53 are provided at a plurality of positions on the peripheral surface of the arrow octopus main body 42, and the guide pipe 55 is provided with a straight pipe 55a extending from the upper portion to the lower portion of the arrow octopus main body 42.
A plurality of curved tubes 55b are formed in a circular arc shape from the lower side of a toward the pins 53. The curved tube 55b is a 90 ° arc, with the upper end opened right above and the lower end opened right beside.

On the other hand, the linear body 56 is a rod 56 in the straight pipe 55a.
a and a flexible rope 56b in each curved tube 55b. The rod 56a is provided with a pull-out operation part 57 at the upper end, and a connection part 58 connected to the rope 56b at the lower end.

As shown in FIG. 3, the rope 56b connects a pair of flanged pins 53 with one rope 56b.
The central portion of the rope 56b is folded back and tied with a rope stopper 59 to form a connection hole 60 with the rod 56a, and the connection portion 58 at the lower end of the rod 56a is engaged with the connection hole 60.

As shown in FIGS. 1 and 3 (a),
On the side surface of the arrow octopus main body 42, a guide tube 61 is provided integrally from the upper part to the lower part by welding or the like, and a gauge bar 62 is provided in the guide tube 61 so as to be vertically movable. Is in contact with a seat plate 21 having a screw hole at the head of the pile 13. A bent portion 63 is provided at the upper end of the gauge bar 62.
The predetermined dimension a is set between the bent portion 63 and the upper end of the guide tube 61 in a state where the lower end of the gauge bar 62 is in contact with the seat plate 21 of the pile 13.

Next, the operation of this embodiment will be described.

First, as shown in FIG. 4, the pile 13 is laid down, and when the head of the pile 13 reaches near the ground 25,
The suspension plate 23 is removed, and the pile-side holding pieces 51 are welded to two places of the threaded seat plate 21 at the pile head.

Further, a bracket 52 at a lower portion of the arrow octopus main body 42 is provided.
To the pile side holding piece 51 of the pile head
Build 41.

At this time, by inserting a pin 53 with a flange at the tip of a rope 56b hanging down from the lower part of the arrow octopus main body 42 into the pin insertion hole of the pile side holding piece 51 and the bracket 52 from the lateral direction, The octopus main body 42 is connected to the head of the pile 13. At this time, the lower end of the gauge bar 62 contacts the seat plate 21 of the pile head, and the dimension a is determined.

Further, the flange 43 of the arrow octopus 41 is gripped by the chuck mechanism 14 (FIG. 4), and the pile 13 is sunk to a predetermined depth. Since the distance from the ground 25 to the head of the pile 13 is determined by design, using the level adjusting plate 45 and the jack 48 of the level adjusting means 44 attached to the side surface of the arrow octopus main body 42, By adjusting the locking level,
The depth of the head of the pile 13 laid under the ground is adjusted. Thereby, the pile head level in the ground can be managed while corresponding to the unevenness of the ground 25.

Then, the hardening material of the pile 13 is hardened and the pile 13
The pile 13 is held by the arrow octopus 41 until the fixing state in which the 13 does not self-sink. Whether or not the pile 13 has stopped self-sinking can be confirmed by shortening the jack 48 and determining whether or not a gap is formed between the lifting rod end 49 of the jack 48 and the fixing plate 50.

When removing the arrow octopus 41 from the head of the pile 13 after fixing, the pull-out operation portion 57 of the rod 56a projecting above the straight pipe 55a is used.
Is lifted by a crane or the like, the rod 56a
a), each rope 56b slides in each curved tube 55b to change the pulling force by 90 °, and each pin 53b
Horizontal pulling force to the two pile side holding pieces
Each pin 53 can be simultaneously pulled out from the bracket 51 and the bracket 52.

Whether or not the pin 53 has been completely removed from the pile side holding piece 51 and the bracket 52 is determined by the bent portion 63 of the gauge bar 62.
Check by watching the movement. That is, when the arrow octopus main body 42 is slightly lifted by the crane or the jack, the gauge bar 62 is lowered with respect to the arrow octopus main body 42, and if the dimension a is reduced, the pin 53
Is completely off.

Thus, the pin pulling mechanism 54 on the ground
By pulling out the pin 53 from the pile-side holding piece 51 and the bracket 52 in the ground by the operation of
Disconnect 42 and connect the gauge bar
After confirmation by 62, the octopus 41 is lifted to the ground by a crane.

[0044]

According to the first aspect of the present invention, the joining portion of the pile laying octopus is piled on the joining counterpart of the pile head on the ground, and a pin is inserted laterally into these. The head of the pile can be easily connected to the head of the pile, and the level of the locking of the body of the arrow octopus can be adjusted by the level adjustment means to control the level of the pile head when the pile is submerged underground. After fixation, the pin withdrawal mechanism on the ground can be used to pull out the pin from the mating part and the connecting part in the ground, so that the connection of the arrow octopus to the pile can be reliably released, and the arrow octopus can be securely removed. Can be pulled up to the ground. Further, it is economical because it is not necessary to use a conventional expensive long bolt. Furthermore, since it is only necessary to pull out the pin without tightening or loosening the bolt, work time can be reduced,
Labor can be reduced.

According to the second aspect of the present invention, the pin withdrawing mechanism can be easily formed by the guide tube fixed to the side surface of the arrow octopus main body and the linear body passing through the inside of the guide tube.

According to the third aspect of the present invention, it is possible to pull out a plurality of pins simultaneously through the flexible linear bodies in a plurality of curved pipes by pulling a common linear body in a straight pipe. And excellent operability can be obtained.

According to the fourth aspect of the invention, when the connection between the head of the pile and the main body of the arrow octopus is released by pulling out the pin from the mating portion and the joint portion, the main body of the arrow octopus is pulled up. Since the gauge bar descends with respect to the main body of the arrow octopus, the disconnection can be easily confirmed by watching the movement.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an arrow octopus for pile setting according to the present invention.

FIG. 2 is a side view of the same arrow octopus.

3A is a sectional view taken along the line III-III of FIG. 2, and FIG. 3B is a view showing a pin and a linear body.

FIG. 4 is a sectional view showing a pile self-settling prevention device.

FIG. 5 is a cross-sectional view showing a conventional pile erection octopus.

[Description of Signs] 13 Piles 42 Arrow octopus main body 43 Flange as gripped part 44 Level adjustment means 51 Pile side holding piece as coupling partner 52 Bracket as coupling 53 Pin 54 Pin pull-out mechanism 55 Guide pipe 55a Straight pipe 55b Curved tube 56 Linear body 62 Gauge rod

Claims (4)

[Claims] 1. An arrow octopus main body located on the head of a pile submerged in the ground, a gripped portion provided at an upper end of the arrow octopus main body and gripped by vertical movement means, and an upper side surface of the arrow octopus main body A level adjusting means which is provided on the ground and which adjusts a locking level of the arrow octopus main body, and a coupling counterpart provided on the lower side surface of the arrow octopus main body and protruding upward from the head of the pile. A coupling portion that overlaps on the side, a pin inserted into the coupling partner and the coupling portion from the lateral direction, and a pin pull-out mechanism that is provided over substantially the entire length of the arrow octopus main body and pulls out the pin from the coupling partner and the coupling portion. An arrow octopus for setting a pile. 2. The pin pull-out mechanism includes a guide tube fixed to a side surface of the arrow octopus main body, and a linear body drawn from a pin through the inside of the guide tube to an upper portion of the arrow octopus main body. The arrow octopus for staking a pile according to claim 1. 3. A plurality of connecting portions and pins are provided on a lower side surface of the arrow octopus main body, and the guide tube is a straight pipe arranged from an upper portion to a lower portion of the arrow octopus main body, and a pin from a lower side of the straight tube. 3. The arrow octopus according to claim 2, further comprising: a plurality of curved pipes curved in an arc shape toward the curved pipe, wherein at least a linear body in each curved pipe has flexibility. 4. The pile according to claim 1, further comprising a gauge bar provided on the side surface of the arrow octopus body so as to be vertically movable and having a lower end abutting on a head of the pile. Arrow octopus for sinking.