JP2003041585A - Method for gripping rotary screwed pile with spiral excavating blade by chuck device for tubing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently erect a rotary screwed pile with a spiral excavating blade on the outer periphery of a tip part by simplifying the mounting work process of the rotary screwed pile. SOLUTION: A chuck cylinder 9 is operated to make an inner diameter between a plurality of chuck collars 14 slightly larger than the diameter of a body 13a of the rotary screwed pile 13, and the rotary screwed pile is lifted by a crane to allow the excavating blade 13b to face a recessed groove 14a and then to pass through it so as to be positioned below the chuck collars 14. The chuck cylinder 9 is operated to grip the body of the rotary screwed pile by the inner peripheral surfaces of a plurality of chuck collars. A casing tube rotating device 5 is then rotated to erect the rotary screwed pile.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the construction of a rotary screw-in pile having a spiral excavation blade on the outer circumference of the tip by using a tubing device for constructing a large-diameter pile in civil engineering foundation work, etc. The present invention relates to a method for gripping the rotary screwed pile with a chuck device of a tubing device.

[0002]

2. Description of the Related Art A tubing device for rotationally press-fitting a casing tube and a large-diameter steel pipe pile into the ground is used to rotate the casing tube and the large-diameter steel pipe pile with a diameter smaller than that of the casing tube and a spiral drilling blade on the outer periphery of the tip. There is a construction method in which a screwed pile is press-fitted into the ground. In this method of constructing a rotary screw-in pile, since the rotary screw-in pile has a smaller diameter than the casing tube and the large-diameter steel pipe pile, the rotary screw-in pile and the chuck device of the casing tube rotating device are installed. There is a case in which a chuck collar is inserted to hold the rotary screwed pile, and a case where a chuck member of a chuck device dedicated to the rotary screwed pile is used.

However, since the diameter of the spiral excavation blade is considerably larger than the diameter of the body of the rotary screw-in pile, the rotary screw-in pile is mounted on the tubing device by rotating the screw on the tubing device installed on the ground. After inserting the pile, the construction method to attach the chuck collar that was lifted by the crane to the chuck device, or to install the rotary screw pile on the ground and install the chuck collar in advance.
Alternatively, a construction method has been adopted in which a tubing device to which a chuck member dedicated to a rotary screw-in pile is attached is lifted by a crane and is placed over the rotary screw-in pile from above.

[0004]

In the former construction method, a plurality of chuck collars must be inserted and fixed between the rotary screw-in pile and the chuck device, and the work process is very troublesome. It was Further, in the latter construction method, since a heavy tubing device is lifted to a high position, a crane having a large capacity is required, and since the installation work is carefully performed, it takes a long time.

Therefore, the present invention provides a method of gripping a rotary screwed pile having a spiral excavating blade with a chuck device, which can be installed efficiently by simplifying the work of mounting a rotary screwed pile having an excavating blade on the outer circumference of the tip. It is intended to be provided.

[0006]

In order to achieve the above object, a method of gripping a rotary screwed pile having a spiral excavation blade on the outer circumference of a tip end by a chuck device provided in a casing tube rotating device of a tubing device. In the present invention, according to the present invention, the inner peripheral surface of a plurality of chuck members (including a chuck collar) provided in the chuck device has a height that allows the excavation blades to pass through the chuck members when the chuck members are opened. A groove having a depth is continuously formed in a spiral shape corresponding to the spiral pitch of the excavating blade, and a chuck device is operated to change the inner diameter between the plurality of chuck members to the rotary screwed pile. With a diameter slightly larger than the diameter of the body, the excavation blade is passed through after facing the recessed groove and then positioned below the chuck member, and the chuck device is operated.
The body of the rotary screw-in pile is held by the inner peripheral surfaces of the plurality of chuck members. When the excavation blade passes through the groove, the casing tube rotating device is rotated in a direction opposite to the rotation direction of the rotary screw-in pile while gradually lowering the rotary screw-in pile lifted by a crane. Or, in a state where the rotary screw-in pile is lifted up by a crane, while operating the casing tube rotating device in a direction opposite to the rotating direction of the rotary screw-in pile, operating the lifting cylinder to raise it, There is a method of gradually lowering while rotating the rotary screwed pile that is lifted by a crane.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The method of the present invention will be described below in more detail with reference to the embodiments shown in the drawings. FIG. 1 shows an example of a first embodiment of an apparatus for carrying out the method of the present invention.
The tubing device 1 supports an elevating frame 3 arranged on an upper part of a base frame 2 so as to be able to ascend and descend by an elevating cylinder 4 standing on the base frame 2, and a casing tube rotating device 5 is attached to the elevating frame 3. It is provided.
This casing tube rotating device 5 is used for the lifting frame 3
It has a ring-shaped rotating body 6 rotatably provided on the inner side thereof and a rotary drive device 7 for rotating the rotating body 6.

Further, the casing tube rotating device 5 is
It has a chuck device 8. This chuck device 8 is
Chuck cylinder 9 erected on the elevating frame 3
A support frame 10 supported by the chuck cylinder 9 so as to be lifted and lowered, a ring-shaped upper frame 11 rotatably supported by the support frame 10, and a plurality of wedge-shaped suspension frames suspended by the upper frame 11. The support frame 1 includes a chuck member 12 and expands and contracts the chuck cylinder 9.
When 0 is moved up and down, each chuck member 12 is moved to the rotary member 6
The chuck members 1 move up and down along the inclined inner surface of each chuck member 1.
Increase or decrease the inner diameter between the two.

In the present embodiment, the rotary screw piles 13 are not directly gripped by the chuck members 12, but are indirectly gripped by the chuck collars 14. Therefore, a chuck collar 14 is attached to each of the chuck members 12 so that the rotary screwing pile 13 is gripped. The rotary screw-in pile 13 has a body 1
Helical excavation blade 13 formed to have a diameter larger than 3a
b is provided on the outer circumference of the tip portion. Each of the chuck members 12
On the inner peripheral surface of the above, that is, in the present embodiment, the inner peripheral surface of each chuck collar 14 is formed with a groove 14a corresponding to the spiral pitch of the excavating blade 13b. Each chuck collar 14
The concave groove 14a is formed to have a height and a depth corresponding to the excavation blade 13b, and is formed to be continuous spirally in a state where each chuck collar 14 is attached to each chuck member 12.

FIG. 2 shows a second embodiment of the apparatus for carrying out the method of the present invention. In this embodiment, the same elements as those of the first embodiment are designated by the same reference numerals and the description thereof is omitted. To do. In the present embodiment, the rotary screw-in pile 13 is configured to directly grip the body 13a with each dedicated chuck member 20. Therefore, the concave grooves 2 corresponding to the spiral pitch of the excavating blades 13b are formed on the inner peripheral surfaces of the plurality of chuck members 20 suspended on the upper frame 11, similarly to the concave grooves 14a.
0a respectively, the groove 20a of each chuck member 20 is formed to have a height and a depth corresponding to the excavation blade 13b, and each chuck member 20 is suspended by the upper frame 11. And, it is formed so as to continue spirally.

Next, using the tubing apparatus 1 constructed as in the first and second embodiments, a spiral excavating blade 13b is formed.
Explaining an embodiment of a method of building the rotary screw-in pile 13 having the outer periphery of the tip, the tubing device 1 is installed,
By operating the chuck cylinder 9 to extend it, the inner diameter between the plurality of chuck members 20 (including the chuck collar 14) is made slightly larger than the diameter of the body 13a of the rotary screw-in pile 13.
The rotary screw-in pile 13 is lifted by a crane (not shown) so that the excavation blade 13b faces the concave groove 20a (14a) and then passed. The groove 20a (14
As a method of passing a), the casing tube rotating device 5 is rotated in a direction opposite to the rotation direction of the rotary screw-in pile 13 while gradually lowering the rotary screw-in pile 13 lifted by a crane. In the state where the rotary screw-in pile 13 is lifted up by the crane, the casing tube rotating device 5 is rotated in the opposite direction to the rotating direction of the rotary screw-in pile 13 to operate the lifting cylinder 4 to raise the crane. This can be achieved by gradually lowering while rotating the rotary screwed-in pile 13 that has been lifted.

As a result, the excavation blade 13b can be positioned below the chuck member 20 (chuck collar 14). Then, the chuck cylinder 9 is operated to be contracted, and the body 13a of the rotary screwing pile 13 is gripped by the inner peripheral surfaces of the plurality of chuck members 20 (chuck collars 14).
Then, by rotating the casing tube rotating device 5, the rotary screw-in pile 13 can be built. In this case, by rotating the casing tube rotating device 5 and contracting the lifting cylinder 4, the rotary screw-in pile 13 is rotationally pressed into the ground.

In the first embodiment, the chuck collar 14 is attached to each of the wedge-shaped chuck members 12, but the present invention can be applied to a chuck collar attached to a band type chuck.

[0014]

As described above, according to the method of the present invention, the inner peripheral surface of the chuck member (chuck collar) of the tubing device is provided with the groove corresponding to the spiral pitch of the spiral excavation blade of the rotary screwing pile. Since the excavation blade is formed and is positioned below the chuck member (chuck collar) by passing through the concave groove due to the rotation of the casing tube rotating device or the rotation of the rotary screwing pile, the rotary screwing pile is attached to the chuck member. It can be easily gripped by the (chuck collar) and attached to the tubing device, and the work process for assembling the rotary screw-in pile having the spiral excavation blade at the tip can be simplified and efficient construction can be performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a tubing apparatus showing a first embodiment example for explaining the method of the present invention.

FIG. 2 is a sectional view of a tubing apparatus similarly showing a second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tubing device, 5 ... Casing tube rotating device, 8 ... Chuck device, 13 ... Rotating screw pile, 13a
... fuselage, 13b ... excavation blades of rotary screwed pile 13,
... Chuck collar, 14a, 20a ... Groove, 20 ... Chuck member

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Eiichiro Saeki             2-6-3 Otemachi, Chiyoda-ku, Tokyo New             Nippon Steel Corporation (72) Inventor Takayoshi Fukumura             2-6-3 Otemachi, Chiyoda-ku, Tokyo New             Nippon Steel Corporation F-term (reference) 2D029 DC00                 2D050 AA06 CB23 EE04

Claims (4)

[Claims] 1. A method of gripping a rotary screwed pile having a spiral excavation blade on the outer circumference of a tip end thereof with a chuck device provided in a casing tube rotating device of a tubing device, wherein a plurality of chucks provided in the chuck device are provided. A concave groove having a height and a depth that allow the excavation blade to pass through the chuck member when the chuck member is opened is continuously formed on the inner peripheral surface of the member in a spiral shape corresponding to the spiral pitch of the excavation blade. After making the inner diameter between the plurality of chuck members slightly larger than the diameter of the body of the rotary screw-in pile and exposing the excavation blade to the groove, Spiral excavation characterized by passing through and locating below the chuck member, operating the chuck device, and gripping the body of the rotary screwed pile by the inner peripheral surfaces of the plurality of chuck members. A method of gripping a rotary screwed pile having blades with a chuck device of a tubing device. 2. The passage of the excavation blade through the recessed groove is performed by gradually lowering the rotary screw-in pile lifted by a crane while rotating the casing tube rotating device in a direction opposite to the rotating direction of the rotary screw-in pile. A method of gripping a rotary screw-in pile having a spiral drilling blade according to claim 1, which is rotated in a direction, by a chuck device of a tubing device. 3. The passage of the excavation blade through the concave groove rotates the casing tube rotating device in a direction opposite to the rotation direction of the rotary screw-in pile in a state where the rotary screw-in pile is lifted by a crane. A method for gripping a rotary screw-in pile having a spiral excavation blade according to claim 1 with a chuck device of a tubing device by operating a raising / lowering cylinder while raising. 4. The rotary screw-in pile having spiral excavation blades according to claim 1, wherein the passage of the excavating blade through the groove is gradually lowered while rotating the rotary screw-in pile suspended by a crane. A method of gripping with a chuck device of a tubing device.