JPH089864B2 - Pile press-fitting method on hard ground - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for press-fitting a pile on hard ground.

[0002]

2. Description of the Related Art Conventionally, as a method of press-fitting a pile into hard ground including gravel, cobblestone, etc., a water jet is used in combination with the press-fitting pile to reduce the friction resistance of the tip and peripheral surface of the pile, and to press-fit.
A method is used in which the ground is drilled with an earth auger and a pile is press-fitted into the hole.

[0003]

However, there is a work site where the use of the water jet adversely affects the neighborhood, and hard ground which is difficult to press fit even if the water jet is used. In addition, it may be difficult to carry in a large combined machine due to the space of the work site, and in such a case, it is extremely difficult to press fit the piles. In particular, it is difficult to press fit a pile with a large diameter and a large tip resistance or a pile with a small strength such as concrete sheet pile. The present invention has been made in view of such circumstances, and an object thereof is to provide a pile press-fitting method capable of smoothly and promptly press-fitting a pile in hard ground.

[0004]

In order to achieve the above object, the pile press-fitting method of the present invention is designed to hold an existing drill hole resistance with a plurality of clamps and fix the drill hole pile press-fitting / extracting machine to a conventional drill hole pile. Then, attach a drilling device to the drilling pile sandwiched by the chuck, press the drilling pile while drilling the ground with the drilling device, then turn the chuck backward and pull out the existing drilling pile behind. While holding the pile with the chuck, the chuck is swung forward again to press the drilling pile adjacent to the existing drilling pile at the front end to an appropriate depth, and then the drilling anti-press-fitting / extracting machine is used for the existing drilling pile 1 It is characterized in that the pile is pushed forward by the pitch and then the pile is press-fitted into the extraction trace of the drilled pile by the pile press-fitting / pulling machine arranged subsequent to the drilling pile press-fitting / pulling machine.

[0005]

[Operation] A drilling pile equipped with a drilling device such as an August cruc is clamped by the chuck of a punching press fitting / extracting machine that grips an existing drilling pile with a clamp, and the hard ground is ground while rotating the Augs screw. After making holes, press the hole piles into the ground, turn the chuck backward after the press-fitting is completed, pull out the existing hole piles in the rear from the ground, and turn the chuck forward again while holding the extracted hole piles. After that, the chuck is moved forward by one pitch for the drilling pile, and is press-fitted while operating the drilling device adjacent to the existing drilling pile at the front end. At the time of press-fitting to an appropriate depth, the clamp is advanced together with the saddle for one pitch of the pile to grip the existing drilled pile at the rear. The pile row is constructed by sequentially press-fitting the piles to the softened portion of the pulling-out trace of the rear hole-piercing piles by the pile press-fitting and extracting machine arranged subsequent to the punching-hole press-fitting and extracting machine.

[0006]

Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the hole-piercing press-fitting / extracting machine 1 is self-propelled on the existing hole-drilling anti-P2 and drills the ground with the August cruc 2 while drilling the hole-piercing pile P.
0 is press-fitted into the ground and includes a saddle 3 and a slide base 4 which can be moved back and forth and can be freely rotated, and a plurality of clamps 5 for gripping an existing drilling pile P2 are provided under the saddle 3. It is installed vertically. A mast 6 is erected on the slide base 4 and a chuck 7 for sandwiching the drilled pile P0 is attached to the front part of the slide base 4 so as to be vertically movable.

The drilling pile P0 is sandwiched in a state of penetrating the chuck 7, and an auger screw 2 as a drilling device is rotatably attached to the drilling pile P0 by a mounting mechanism 8. As shown in FIG. 2, this attachment mechanism 8 is composed of a gripping mechanism 10 for fixing the auger screw 2 inside the H-shaped pile which is the drilled pile P0, and a drive mechanism 11 for rotating the auger screw 2. . The gripping mechanism 10 is composed of a fixed claw 13 and a movable claw 14. The fixed claw 13 has a fluid pressure cylinder 15 incorporated therein, and a tip of a piston rod 16 is attached to the movable claw 14. When attaching to the upper end of the drilling pile P0, the piston rod 16 is extended to move the movable claw 14.
Is pressed to the inner circumference of the drilling pile P0, and the drilling pile P together with the fixed claw 13 is pressed.
Fixed at 0. Then, the auger screw 2 is rotated by the motor M incorporated in the drive mechanism 11 to drill a hole in the ground.

The mounting mechanism 8 is constructed so that it can be attached to and detached from the hole drilling pile P0. However, the mounting mechanism to the auger screw 2 is not limited to the above, but simply a bolt or the like may be provided inside the hole drilling resistance P0. It may be attached by fixing means.

The chainsaw 36 shown in FIGS. 9 and 10.
Is another embodiment of the drilling device, and the support plates 3 are arranged to face each other.
A chain wheel 35 is attached above and below the space between the four chains 4, and a chain saw 36 is attached to the outer periphery of the chain wheel 35. The rotation of the chainsaw 36 cuts the hard ground such as rock to soften it and press-fit the hole-piercing piles.

A pile press-in / pull-out machine 21 for press-fitting a pile is inserted behind a punching-pile press-in / pull-out machine 1 for press-fitting a hole-piercing pile into hard ground, and a pile press-in / pull-out machine 21 for press-placing a pile is installed behind the punching pile piling-out machine 19. Extraction trace 19
The pile row is constructed by press-fitting the pile into the softened part of. The pile press-fitting / pulling-out machine 21 may be a known one that is self-propelled on the existing P4 row and press-fits the pile. In the embodiment, an H-shaped pile or a U-shaped pile is used as the drilled pile, and a steel sheet pile is used as the subsequently press-fitted pile. In addition to this, using a steel pipe pile as a hole drilling pile and making the subsequent press-fitting pile a steel pipe sheet pile, the subsequent press-fitting pile can be selected from concrete sheet pile, steel sheet pile, steel pipe sheet pile and other resistance, and according to the shape of this pile. The shape of the drilled pile can be determined.

The pile press-fitting method of the present invention will be described with reference to FIGS. 1 and 3 to 8. Clamp 5 as shown in FIG.
The hole drilling pile P0 is inserted into the chuck 7 of the hole drilling pile press-fitting / extracting machine 1 that holds the existing hole drilling anti-P2, and is sandwiched, and the auger screw 2 is attached to the upper end through the attachment mechanism 8. The auger screw 2 is rotated by the motor M of the drive mechanism 11, and the auger screw 2 is drilled in the ground. In parallel with this, the chuck 7 is lowered to press the drilling pile P0 to the same height as the existing drilling pile P2. As a result, the hard ground is crushed and softened by the August cruc 2, so that the drilled pile P
0 is easily press fit. The hole-piercing pile P0 that has been press-fitted serves as a pile for moving the hole-piercing pile press-fitting and extracting machine 1.

Next, as shown in FIG. 3, after the hole punching pile P0 is press-fitted, the mast and the chuck 7 are pivoted backward together with the saddle 3 by 180 degrees and the chuck 7 is lowered to sandwich the existing hole punching pile P7 at the rear. And remove it. Next, as shown in FIG. 4, the chuck 7 is held with the extracted hole-piercing pile P7 being held.
Swivel forward 180 degrees to move the slide base 4 forward to move the chuck 7 by one pitch of the pile, and the front end drilling anti-P0
Next, the auger screw 2 is rotated to make a hole in the ground and the chuck 7 is lowered to press-in the hole making pile P7.

When the hole-piercing pile P7 is press-fitted to a certain depth, the rotation of the auger screw 2 is temporarily stopped, the press-fitting of the hole-piercing pile P7 is stopped, and the chuck 7 holds the hole-piercing pile P7. The holding state of the clamp 5 holding the drilled pile P2 is released and the saddle 3 is raised to an appropriate height (FIG. 5). After that, the clamp 5 is moved forward together with the saddle 3 by one pitch of the pile, and then the saddle 3 is lowered to grasp the existing drilling pile P0 and the existing drilling pile P2 at the front end by the clamp 5 (FIG. 7). Then, the auger screw 2 is rotated again and the chuck 7 is lowered while drilling the ground to press the drilling pile P7 to the same height as the existing drilling pile P2 (FIG. 8). By repeating this operation, the drilled piles can be sequentially press-fitted.

When advancing the clamp 5 together with the saddle 3 by one pitch of the piles, if the existing pile row does not hinder the forward movement of the clamps, the chuck 3 clamps the drilled pile P7 to obtain a reaction force. The saddle 3 can be opened outward and the saddle 3 can be moved forward on the pile row without raising the clamp 5.

On the other hand, the pile P3 is press-fitted into the softened portion of the hole-pile pull-out trace 19 which has been extracted and removed from the ground. The pile press-fitting / extracting machine used for press-fitting the piles may be a known one that presses the piles while self-propelled on the existing P4 row of piles, and the pile row can be constructed continuously after the drilled pile has been pulled out. . The operation will be briefly described. The existing pile P4 is held by the clamp 20, and the pile P3 is clamped by the chuck 22 of the pile press-fitting / pulling machine 21 placed on the existing pile P4 row, and the chuck 22 is lowered to be press-fitted. (Fig. 1).

After the press-fitting of the pile P3 is completed, the saddle is advanced by one pitch of the pile to advance the chuck 22 by one pitch, and the newly press-fitted anti-P6 is sandwiched between the chuck 22 and press-fitted. The press-fitting is temporarily stopped when the pile P6 is press-fitted to an appropriate depth (FIG. 3). Then, the gripping of the existing pile P4 by the clamp 20 is released while the pile P6 is clamped, and the clamp 20 is raised together with the saddle (FIG. 5). Then, the saddle is advanced and then lowered, and the clamps 20 are used to install the existing piles P3 and P4.
To fix the pile press-in / pull-out machine to the existing pile (Figs. 6 and 7). Then, the chuck 22 is lowered again to press-fit the anti-P6 (FIG. 8). In this way, since the piles are pressed into the softened ground after the extraction of the drilled piles, it is possible to press-fit smoothly and quickly even on hard ground.

[0017]

EFFECTS OF THE INVENTION The present invention uses a drilling device such as an August cruc attached to the drilling resistance of a self-propelled drilling pile press-in / extractor on a pile to soften the hard ground while softening it while press-fitting the drilled pile. In order to press fit the pile with the self-propelled on-pile self-propelled pile press-in / extractor placed after the above-mentioned self-propelled on-pile anti-press-fit / extractor on the pile, to the softened part of the excavated pile. A pile row can be constructed smoothly and quickly even on hard ground.

[Brief description of drawings]

FIG. 1 is a side view of a pile press-fitting / pulling machine used for implementing the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an explanatory diagram of the operation of the present invention.

FIG. 4 is an explanatory diagram of the operation of the present invention.

FIG. 5 is an explanatory diagram of the operation of the present invention.

FIG. 6 is an explanatory diagram of the operation of the present invention.

FIG. 7 is an explanatory diagram of the operation of the present invention.

FIG. 8 is an explanatory diagram of the operation of the present invention.

FIG. 9 is a front view of an embodiment of a hole drilling device.

10 is a sectional view taken along line XX of FIG.

[Explanation of symbols]

 1 Drilling Pile Press-in / Pulling Machine 2 August Cru 3 Saddle 4 Slide Base 5, 20 Clamp 6 Mast 7, 22 Chuck 19 Drilling Pile Extraction Trace 21 Pile Pressing / Pulling Machine 36 Chain Saw P0 Drilling Pile P2 Existing Drilling Pile P3 Pile P7 Rear drilling pile

Claims (1)

[Claims] 1. An existing drilling pile is gripped by a plurality of clamps to fix a drilling pile press-fitting / extracting machine to the existing drilling pile, and a drilling device is attached to the drilling pile sandwiched by a chuck. While punching the ground by the device, press the hole drilling pile into place, then turn the chuck backward to pull out the existing hole drilling pile at the rear, and while holding the pile with the chuck, turn the chuck forward again and move the chuck to the front end. After press-fitting the hole-drilling pile to an appropriate depth adjacent to the hole-drilling pile, advance the hole-pile press-in / pull-out machine by one pitch of the existing hole-drilling pile, and then press the hole-drilling pile into the extraction mark of the hole-drilling pile. A method for press-fitting a pile in hard ground, in which a pile is press-fitted by a press-fitting pull-out machine arranged after the pull-out machine.