JPH0489989A - A method for connecting double pipes in the earth anchor method and an automatic setting device for double pipes on a drilling machine used in the method - Google Patents

Abstract

PURPOSE:To enhance the working effectiveness by transporting a double pipe to over a guide sheel and locating in the center correctly, releasing an inner pipe from detention and sliding for screw fitting with an existing inner pipe, sliding the outer pipe and setting to an existing outer pipe. and making them into screw engagement. CONSTITUTION:A boring machine B equipped with an automatic double-pipe setting device A is installed at a side of execution of works. An inner rod and a drill pipe P3 are set, and the 1st boring is conducted. Double pipe is moved onto a guide shell 20, and the inner pipe is slid, and the bottom is set on the top of the inner rod, and connection is made by screw engagement. Then the outer pipe P1 is slid, and the bottom is set on the top of the drill pipe P3, and the outer pipe P1 is connected with the pipe P3 by screw engagement. After finishing of boring, the inner pipe and nylon rod are pulled out, upon injecting cement milk in the outer pipe P1 and drill pipe P3, a tension steel wire is inserted. Finally the outer pipe P1 is drawn off. This will enhance the working effectiveness.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for connecting double pipes in an earth anchor construction method and an automatic setting device for double pipes to a drilling machine used in the method.

[Prior art] In the earth anchor construction method, to set a double pipe in a hole drilling machine, the inner pipe is passed through a wire rope and lifted up, or the outer pipe is hung with hanging fittings at both ends, and the inner pipe is lifted up. It was temporarily fixed to an outer pipe, lifted and transported, and set in a drilling machine.

[Problem to be solved by the invention] Double pipes are often hung diagonally due to the nature of the earth anchor construction method, and the conventional setting method requires at least three workers, resulting in poor workability. It was dangerous.

The present invention provides a method for connecting double pipes in the earth anchor construction method that can be easily and safely set double pipes in a drilling machine with a small number of people, and can be connected to existing double pipes. The object of the present invention is to provide an automatic setting device for double pipes to a drilling machine used in this construction method.

[Means for Solving the Problems] The method according to the present invention involves suspending and placing a double pipe on a plurality of U-shaped holders pivoted to the side of a guide shell of a drilling machine, and clamping the double pipe on the holders. The outer tube is fixed by the cylinder, and the lower end surface of the inner tube is locked by the stopper, and the holder is rotated approximately 1800 times by the cylinder to be moved above the guide shell and centered, and the locking of the inner tube by the stopper is released. Then, slide the inner tube and set it on the already buried inner tube, rotate the set inner tube with the swivel of the hole drilling machine, screw it to the lower inner tube, and connect the swivel to the outer tube. At the same time, hold the outer tube with the arm, release the fixation of the outer tube with the clamping cylinder, slide the outer tube and set it on the already buried outer tube, and rotate the set outer tube with the swivel to move it downward. It is characterized by being threadedly connected to the outer tube.

Further, the device according to the present invention includes a lever pivotally attached to the top of a plurality of brackets provided on the side of a guide shell of a hole drilling machine via a common support shaft, and a reversing cylinder that rotates about the support shaft. , a plurality of U-shaped holders pivotally attached to the upper ends of the levers, a hunting cylinder interposed between the holders and the lever, and a chucking cylinder fixing the outer tube to the holder; A holding arm is rotatably provided on the holder and selectively holds the outer tube, and a stop arm is rotatably provided on the lower holder and selectively locks the lower end surface of the inner tube. It is characterized by

[Function] In the present invention configured as described above, when connecting double pipes in the construction of an earth anchor, the stop arm of the lower holder is set to the stop position, and the double pipes are suspended by a crane to connect multiple pipes. (for example, two holders), and the clamping cylinder is extended to fix the outer tube to the holder.

In this state, the inner tube is locked to the stop arm. Next, the cylinder is extended, the holder is rotated approximately 180 degrees, and the double pipe is moved above the guide shell 20 of the drilling machine and set at the midline position. Next, release the locking of the inner tube by the stop arm, slide the inner tube inside the outer tube, set the lower end to the already buried inner tube, and rotate the inner tube with the swivel to connect both inner tubes. Connect by screwing.

Next, a swivel is connected to the outer tube, the holding arm is rotated to hold the outer tube, and the holding cylinder is contracted to release the fixation of the outer tube. Next, slide the outer tube and set it on the already buried outer tube, rotate the swivel, and screw the bisexual tubes together.

[Example] The present invention will be described in detail below with reference to the drawings.

1 and 2 schematically show a double pipe automatic setting device i1A embodying the present invention.

In the figure, device A is attached to one side (left side in the illustrated example) of a guide shell 20 of drilling machine B (FIG. 8), and is provided with two units AI and A2.

A lever 3 is pivotally attached to the upper end of a bracket 1 fixed to a guide shell 20 of the unit A1 by a shaft 2 common to the unit A2. A U-shaped holder 10 with an upward opening is pivotally attached to the upper end of the lever 3 by a pin 4 in the state shown in FIG. An arm 5 is protruded from the shaft 2, and the arm 5 and the guide shell 2
A reversing cylinder 7 for rotating the lever 3 is interposed between the lever 3 and the bracket 6 provided at the lever 3. Furthermore, a hunting cylinder 8 for rotating the holder 10 is interposed between the lower end of the lever 3 and the vicinity of the bin 4 of the holder 10. A chucking cylinder 1 is mounted on the holder 10.
1. Stop lever 14 and holding lever 17
is provided.

The other unit A2 has the same structure as the unit A1 except for the stop lever 14, and the unit A1 will be described below.

3 and 4, the holder 10 is provided with a half-moon lever 12 that faces the checking cylinder 11 and cooperates with the cylinder 11 to clamp the outer tube P2 of the double tube P. Note that, instead of using this lever 12, an adjustment screw 12a (FIG. 7) can be used.

The stop lever 14 and the holding lever 17
is pivotally attached to a shaft 13 provided at the center of the holder 10. A stop arm 16 is provided at the end of the boss portion 15 of the stop lever 14, and locks the lower end surfaces of the inner tube P2 and the outer tube P1, which are tilted downward in the illustrated position, and the lever 14 is moved to the position 14a. (Fig. 4), the locking of both pipes P1 and P2 is released.

On the other hand, the holding arm 17 is provided with an arc-shaped holding arm 18 that faces approximately half the circumference of the outer tube P1. Then, the outer tube P1 is held in the illustrated position, and when the lever 17 is rotated to the position 17a (FIG. 4), the holding of the outer tube P1 is released.

Next, the manner in which the double pipe P is set in the hole drilling machine B will be explained with reference to FIGS. 5 to 7.

First, as shown in FIG. 5, the stop lever 14 of the unit A1 is operated to rotate the stop arm 16 to the illustrated position. Lift the double pipe P with a crane and attach both holders 1
0.10, extend the chucking cylinder 11 to fix the outer tube P1, and attach the lower end surface of the inner tube P2 to the arm 16.
Lock it with. .

Next, as shown in FIG. 6, the reversing cylinder 7 is extended and the holder 10 to which the double pipe P is fixed via the shaft 2 is installed.
．． 10 by approximately 90°.

Next, as shown in FIG. 7, the hanging cylinder 8 is extended, and the holder 10.10 to which the double pipe P is fixed is further rotated approximately 90 degrees around the pin 4, and the double pipe P is attached to the guide shell 20.
Move it above and set it in the midline position. During this period, the inner tube P2 moves relative to the outer tube P1 from the state shown in FIG. 5 to the state shown in FIG. It won't fall.

Next, the method of constructing the earth anchor will be explained with reference to FIGS. 8 to 15.

First, a drilling machine B equipped with an automatic double pipe setting device A is installed at the construction site (Fig. 8).

Next, an inner rod with an inner bit attached to the tip and a drill pipe P3 with a ring bit attached to the tip are set, and drilling of the first hole is started (Fig. 9).

After drilling the first hole, move the double pipe P to crane 21.
and then moved onto the guide shell 20 in the manner shown in FIGS. 5 to 7 (FIG. 10).

Therefore, in FIG. 4, the stop lever 14 is rotated counterclockwise to release the locking of the inner tube P2 by the stop arm 16, and the inner tube P2 is slid downward inside the outer tube P1, and the lower end is Set it on the upper end of the inner rod. Next, the inner pipe P2 is rotated by a swivel (not shown) of the hole drilling machine B and is threadedly connected to the inner rod in a known manner. Next, a swivel is connected to the outer tube P1, and as shown in FIG. 4, the holding lever 17.17 is rotated from the chain line position 17a to the solid line position to hold the outer tube P1 by the arm 18.18, and the chucking Contract the cylinder 11.11 to free the outer tube P1.

Next, the outer tube P1 is slid and its lower end is set on the upper end of the drill pipe P3, and the swivel is rotated to threadably connect the outer tube P1 to the drill pipe P3.

Next, when drilling is completed (Fig. 11), pull out the inner pipe P2 and the inner rod (Fig. 12). At this time, the inner pipe P
2 and the inner rod from the hole drilling machine B are carried out by following the steps shown in FIGS. 7 to 6 to 5 and reverse to those described above.

Next, the hose 22 is inserted into the outer tube P1 and the drill pipe P3, and cement milk 23 is injected (FIG. 13).

Next, a tensile steel wire 24 is inserted into the cement milk (FIG. 14).

Finally, the outer pipe P1 and drill pipe P3 are pulled up, removed from the drilling machine B in the same manner as the inner pipe P2 and the inner rod described above, and transferred (FIG. 15) to complete the construction.

[Effects of the Invention] Since the present invention is configured as described above, a double pipe can be set in a hole drilling machine with good workability and safely by a small number of people (specifically, one person), and it can be done efficiently. Connect the double pipe to
Construction period and construction costs can be reduced.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views of the device embodying the present invention before and after setting the double tube, Figures 3 and 4 are front and side views of the device, and Figure 5 , Figures 6 and 7 respectively show a state in which the double pipe is mounted and fixed on the holder, a state in which the holder is rotated approximately 90 degrees, and a state in which the holder is rotated approximately 180 degrees and the double pipe is set in the hole drilling machine. Side view showing the condition, No. 8
15 through 15 are front views showing the construction mode of the earth anchor. A...Double pipe automatic setting equipment ftB...Drilling machine 7
...Reversing cylinder 8...Hunking cylinder
10...Holder 11...Chucking cylinder 16...Stop arm 18...Holding arm 20...Guide shell

Claims (2)

[Claims] (1) The double pipe is suspended and placed on a plurality of U-shaped holders pivoted on the side of the guide shell of the hole drilling machine, and the outer pipe is fixed to the holders by a clamping cylinder, and the inner pipe is fixed by a stopper. Lock the lower end surface of the holder, and use the cylinder to hold the holder approximately 1
Rotate 80 degrees and move it above the guide shell to center it,
Release the locking of the inner tube by the stopper, slide the inner tube and set it on the already buried inner tube, rotate the set inner tube with the swivel of the drilling machine and screw it into the lower inner tube. Connect the swivel to the outer tube, hold the outer tube with an arm, release the fixation of the outer tube with the clamping cylinder, slide the outer tube, and set it on the already buried outer tube. A method for connecting double pipes in the earth anchor construction method, which is characterized by rotating the outer pipe with a swivel and threadingly connecting it to the lower outer pipe. (2) A lever pivotally attached to the top of a plurality of brackets provided on the side of the guide shell of the hole drilling machine via a common support shaft, a reversing cylinder that rotates the support shaft, and the upper ends of these levers. a plurality of U-shaped holders pivotally attached to the holder, a hunting cylinder interposed between the holder and the lever, a chucking cylinder that fixes the outer tube to the holder, and a rotating cylinder attached to the holder. The holding arm is freely provided and selectively holds the outer tube, and the stop arm is rotatably provided on the holder on the lower side and selectively locks the lower end surface of the inner tube. Automatic setting device for double pipes on a drilling machine.