JPS6220334B2 - - Google Patents

Description

[Detailed Description of the Invention] Conventionally, in this type of pile driving method, a drill consisting of a shaft and an awl at the tip is inserted into a cylinder with spiral blades and rotated to drill the required pile hole and solidify the tip of the excavation. Injecting mortar requires large equipment such as pumps, hoses, and rotary swivels, but such equipment requires capital, and since mortar is used, hoses, etc. are often clogged. The equipment often breaks down and mortar remains in the equipment, resulting in wasted materials.Furthermore, if the equipment is not thoroughly washed after use, it can cause the above-mentioned failures and reduce work efficiency.
Furthermore, in the case of soft ground, when the drill is pulled up from inside the cylinder, the surrounding soil and mud enters the cylinder from the tip of the cylinder, and the hole itself is buried, not to mention the introduction of compaction material such as mortar. The present invention allows the drill to be left as it is at the tip of the excavation, especially in soft ground, and mortar as a consolidation material can be easily and efficiently poured into the cylinder without the need for large equipment. The purpose of the present invention is to provide a pile driving method that completely prevents the intrusion of piles and enables the required pile driving. This will be explained in detail below.

FIG. 1 is a partially cutaway explanatory diagram of a pile hole boring device used in the present invention, and FIG. 2 is a perspective explanatory view of each part of the pile hole boring device. The cylinder 33 has a spiral blade 30 around it, and a handle attachment groove 3 at the top thereof.
1. It has a sleeve 32. The drive angle shaft 19 integrally has a flange 18 having a hacker insertion groove 16 and a lifting rod 17 at its upper end,
Moreover, a drive block fitting part 9 is integrally formed inside the upper part. 46 is a drive block seat, and 47 is an air chamber provided at the four corners. Drive angle shaft 1 from directly below the drive block seat 46
A circular hollow pipe 10 up to the tip of the drive angle shaft 19 is closely attached to the inside of the drive angle shaft 19 and integrally formed by welding. A guide disk 15 having a guide roller 14 is integrally provided at the bottom thereof,
The guide roller 14 is configured to roll in contact with the inner wall of the cylinder 33. The lower part of the guide disk 15 is a part that fits into the drive angle shaft fitting frame 27 formed on the tip aperture 20.
It has a pin hole 13 for connection with a pin 36, and the tip has a mortar through hole 52 and a valve 2 of the tip aperture 20.
1, a valve seat 12 is provided which constitutes a valve device.

8 is a piston rod with a valve 37 at its tip.
The piston 7 has a valve device consisting of a valve seat 38 and an air vent 51, and its upper end is connected to the drive block 6 and the drive shaft connection part 4.
A flange 5 having a square shaft lifting hook 1 and a cylindrical lifting hook 2 is integrally formed between the drive shaft connecting portion 4 and the drive block 6. 45 is Patsukin,
3 is a drive motor, 3' is its drive shaft, and 11 is a hole for fitting the drive shaft of the drive motor.

The tip awl 20 is centered around the tip central axis 23.
A plurality of right-angled triangular plates 24 are arranged radially with the long sides forming a right angle touching the tip central axis 23 and the short sides at the top, and flanges 26 are arranged on the short sides.
The triangular plate 24
A spiral digging blade 25 is provided on the long side, or a bar-shaped digging blade 25' is fixedly provided at the point where the spiral digging blade 25 touches the triangular plate 24 (so that if the points are connected, it will form a spiral shape), A valve 21 is installed at the top of the central shaft 23 at the tip.
At the same time, a spring 22 for operating a valve 21 is mounted inside the central shaft. Flange 2
The central part of 6 is cut out into a quadrilateral shape with a width centered around the top of the tip center shaft 23 and has a width into which the tip part of the drive angle shaft 19 is fitted, and a drive angle shaft fitting frame 27 whose lower part is open is provided in the lower space. is provided. 43 is a pin hole for connecting with the drive angle shaft 19, and 53 is an open opening.

The slide connector 29 consists of a slide frame 40 having a slide pad attachment portion 39 and an outer ring 41, and the slide frame 40 and the outer ring 41 are connected and fixed by a connecting plate 42. Reference numeral 28 denotes a handle which connects and attaches the sliding frame 40 and the outer ring 41.

The direction correction tool 35 has a direction correction groove 34 and a pin hole 44 for connecting with the drive angle shaft 19, and is configured to fit the tip of the drive angle shaft 19.

Each part of the pile hole drilling device used in the present invention has the above-mentioned configuration, but when using this for pile hole drilling, it is necessary to The piston rod 8 is fitted and the drive block 6 is fitted into the drive block fitting portion 9. In this case, the bottom of the drive block 6 is seated on the drive block seat 46, and air chambers 47 are formed at the four corners of the drive angle shaft 19, so that when the piston rod 8 is later inserted into and removed from the drive block 6, the drive block 6 is seated in the drive block seat 46. It is becoming easier to get out of 9. Note that when the drive block 6 is seated as described above, the square shaft lifting hook 1 provided on the flange 5
It is inserted into the hacker insertion groove 16 of No. 8 and engaged with the lifting rod 17, making it possible to lift it.

Next, the slide connector 29 is externally fitted onto the drive angle shaft 19 with the piston rod 8 fitted into the hollow pipe 10, so that the slide connector 19 freely slides on the circumferential surface of the drive angle shaft 19. Configure. At this time, the slide pad 48 is attached to the mounting hole so that it slides smoothly.

Next, a tip aperture 20 is attached to the tip of the drive angle shaft 19.
To install it, fit the tip of the drive angle shaft 19 (the part that forms the valve seat 12 and the pin hole 13 and is the lower part of the guide disk) into the drive angle shaft fitting frame 27 of the tip cone 20. pin 36
are passed through the pin holes 13 and 43 to attach the tip awl 20. The drive angle shaft 19 with the tip end cone 20 attached thereto is then fitted into a cylinder 33 having a spiral blade 30, and fitted into the handle mounting groove 31 of the cylinder 33 of the handle 28 of the slide coupling 29, and the cylindrical lifting hook 2 is engaged with the sleeve 32. Next, the drive motor 3 attached to the boom 49 of the crane
The drive shaft 3' is inserted into the drive shaft insertion hole 11 of the drive shaft connecting portion 4, and the pin 50 is inserted into the pin hole 57 to connect both 3' and 4. When the pile hole boring device used in the present invention having the above-mentioned configuration is suspended in a predetermined position by the boom 49 of a crane and the drive motor is rotated, the tip awl 20 and the cylinder 33 will dig into the ground. At this time, since the tip awl 20 has the same structure as described above, the digging blades 25 and 25' break up the surrounding soil, and the triangular plate 24 (of course, this plate is made of metal) is used to cut the digging blades 25 and 25'. , 25' scrapes the crushed soil, and in the case of hard soil, the soil that has been repelled is placed on the spiral blade 30 of the cylinder 33 and sent to the outside, making excavation extremely easy and the cylinder 33 also smooth. enters the soil.

The tip aperture of a conventionally known pile hole boring device using this type of cylinder is, for example, disclosed in Japanese Patent Publication No. 47-22855.
1m as it has a structure as shown in
Once it digs into the soil, it will never dig any further (it is the same as Rasenko, so it will only rotate and screw into the soil to a certain extent, but will not be dug as a hole and will eventually stop digging. ), so it is usually not put into practical use.

During excavation, the valve 21 is in contact with the valve seat 12 and the valve device is closed, so that dirt, mud, and water do not enter through the lower opening 53 of the drive angle shaft fitting frame 27. After digging to a predetermined depth, the drive is stopped and the piston rod 8 is removed from the hollow pipe 10.

Since the valve 37 is opened at the time of insertion and removal, air resistance is reduced and the insertion and removal are facilitated.

In conventional pile hole drilling equipment of this type, a cylinder with a spiral blade, a tip aperture, and a driving angle shaft connected to this are used to perform the drilling process. Ground improvement material is dropped into the bottom of the hole to drive the required piles, but if the ground is soft, fluidized earth and sand will enter the cylinder, making it impossible to drive the piles, so we need to prevent this phenomenon. The industry has tried various methods, but due to the equipment and materials used, it has not been possible to find a cheap, quick and reliable method. In the present invention, the configuration of the device is as described above, so the piston rod 8 is first unfitted, then mortar is poured into the hollow pipe 10, the piston rod 8 is fitted again, and the piston rod 8 is removed using the boom 49 of a crane vehicle. (Of course, pressing force is applied to the drive shaft connection part 4.) When a pressing force is applied to the mortar, the valve 2 of the tip aperture 20
1 is pushed down, the mortar through hole 52 opens, and the mortar enters the drive angle shaft fitting frame 27 and is discharged from its lower opening 53 around the tip aperture 20 and the lower end of the cylinder 33. In response to this mortar injection, the tip aperture 20 and the drive angle shaft 19 begin to rise (when the mortar is sufficiently injected into the tip of the drilled hole, the pressing force of the piston rod 8 acts as upward pressure from below the flange of the tip aperture 20). Therefore, the mortar continues until the drive angle shaft 19 is pushed up), and when it starts to rise, it means that enough mortar has been poured, and the injection is stopped. A packing 45 is constructed around the piston 7 of the piston rod 8, and when pressing the mortar, the valve 37 seats on the valve seat 38 and closes the air vent 51.
Mortar does not enter into the hollow pipe 10 or the piston rod 8, and when the piston rod 8 is inserted and removed, the valve 37 is lowered and the air vent 51 is opened, so that the piston rod 8 can be easily inserted and removed.

When the mortar injection is completed, move the cone 20, drive angle shaft 19 and piston rod 8 to the cylinder 3.
For example, a required concrete pile 54 is inserted into the cylinder 33 and pushed in firmly using a hydraulic jack 55, etc., and then the cylinder 33 is rotated in the opposite direction to compact the area around the pile while pulling it out of the soil. Finish driving the pile. In addition, when building concrete piles made of shaped steel piles such as H-steel piles as reinforcing aggregates into pile holes, after removing and fitting the driving angle shaft 19, insert a hollow tube of the required diameter into the cylinder 33, and reverse the cylinder 33. After rotating and consolidating the area around the hollow pipe, firmly erecting the hollow pipe, building the shaped steel pile into it, and firmly pushing it in with a hydraulic jack, etc., if it is necessary to correct the direction of the hollow pipe. A direction correction tool 35 is provided at the tip of the drive angle shaft 19.
is installed, the shaped steel head is fitted into the direction correction groove 34, and the drive angle shaft 19 is rotated to correct the direction.
Once this work is completed, concrete is poured into the hollow pipe to form a concrete pile using the shaped steel pile as reinforcement, and the concrete pile is easily driven by pulling out the hollow pipe with a hydraulic jack.

As described above, in the case of the present invention, especially in the case of soft ground, it is extremely easy to prevent mud from entering the cylinder 33, and there is no need for special equipment, and there is no waste of mortar when digging pile holes. It has many advantages, such as easy maintenance of the drilling equipment, extremely simple construction method, and the ability to proceed with work reliably and quickly.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway schematic explanatory diagram showing a state in which a pile hole boring device is dug into the ground. Fig. 2 is a partially cutaway perspective view of each part of the pile hole drilling device, where A shows the drive shaft connection part and flange, B shows the drive block, and C shows the part where the flange and drive block fit together at the top of the drive angle shaft. , D is the slide connector, E is the tip aperture, F
indicate direction correction tools, respectively. G indicates the structure of the cylindrical head. FIG. 3 is a partial sectional view showing the relationship among the spiral bladed cylinder, the drive angle shaft, the piston rod, and the tip cone.
Fig. 4 is a cross-sectional schematic explanatory diagram showing the working process of the construction method of the present invention, where A shows the insertion and removal of the piston rod from the equipment dug underground, B shows the injection of mortar into the hollow pipe, and C shows the piston rod. This shows the mortar pressure injection situation. Also, D shows the insertion and removal of the drive angle shaft and tip aperture upon completion of mortar injection,
E shows the state in which the driving angle shaft is removed from the cylinder, a concrete pile or a hollow pipe is inserted into the cylinder, and then pushed in with a hydraulic jack, and F shows the work of removing the cylinder.

Claims (1)

[Claims] 1. A ``flange 5'' and a ``drive block 6'' comprising a square shaft lifting hooker 1, a cylindrical lifting hooker 2, and a drive shaft connecting portion 4, and a ``valve device'' configured at the tip. A flange 18 having a hacker insertion groove 16 and a lifting rod 17 is integrally formed at the other upper end, and a drive block fitting part is formed inside the lower part of the piston rod 8. 9, and a drive angle shaft 19 integrally comprising a hollow pipe 10 into which the piston rod 8 is fitted, a valve seat 12 which constitutes a valve device together with a valve 21 provided on the tip cone 20 is provided at the lower end of the shaft 19. A pin hole 13 is provided in the upper part of the valve seat 12, and a guide disc 15 that serves as a guide roller 14 is integrally formed in the upper part of the valve seat 12. A valve 21 is mounted on the upper part of the lower surface of this guide disc 15, and a valve 21 is mounted on the upper part of the guide disc 15. Inside, a plurality of triangular plates 24 are arranged radially around a tip central shaft 23 having a spring 22, and
The tip aperture 2 has a structure in which a digging blade 25 provided on the periphery of the triangular plate 24 and a flange 26 are integrally provided on the upper part of the triangular plate 24, and a driving angle shaft fitting frame 27 is formed around the valve 21.
0, and the drive angle shaft 19 with the tip drill 20 is slidably inserted into a slide connector 29 having a handle 28, and has a spiral digging blade 30 on its outer periphery and a handle at its upper end. The hollow pipe 1 is fitted into the cylinder 33 having the mounting groove 31 and the sleeve 32, and is further fitted into the hollow pipe 1 within the drive angle shaft 19.
0, and the drive block 6 is fitted into the drive block fitting part 9 to form a pile hole drilling device.The device is rotated by a drive motor to drill to a predetermined depth, and then the piston rod 8 is inserted into the pile hole. The hollow pipe 1
0, put an appropriate amount of mortar into the hollow pipe 10, insert the piston rod 8 into the hollow pipe 10 again, press it with the boom of the crane, open the valve 21 of the tip aperture 20, and remove the tip aperture 20. 2
0 and around the lower part of the cylinder 33,
Next, the tip cone 20, drive angle shaft 19, and piston rod 8 are pulled out from inside the cylinder 33, and the cylinder 3 is removed.
3, insert the required pile and push it in with a hydraulic jack, etc. If the pile is a section steel and you want to correct its vertical direction, use a direction correction tool 35 having a direction correction groove 34.
This is a pile driving method in which a cylinder 33 is attached to the tip of a drive angle shaft 19, and then the cylinder 33 is rotated in the opposite direction to pull it out and erect a pile. 2. A "flange 5" and a "drive block 6" each having a square shaft lifting hook 1, a cylindrical lifting hook 2, and a drive shaft connection part 4, and a piston 7 forming a valve device at the tip. A flange 18 having a hacker insertion groove 16 and a lifting groove 17 is integrally formed at the other upper end, and a drive block fitting part 9 is provided inside the lower part of the flange 18. A drive angle shaft 19 is integrally formed with a hollow pipe 10 into which a valve is fitted, and a valve seat 12 that constitutes a valve device together with a valve 21 provided on a tip cone 20 is provided at the lower end of the drive shaft 19, and a pin is attached to the upper part of this valve seat 12. A hole 13 is provided,
A guide disk 15 that acts as a guide roller 14 is integrally formed on the upper part, and a plurality of triangular plates 24 are formed on the lower surface of the guide disk 15 around a tip central shaft 23 that has a spring 22 acting on the valve 21 inside the upper part. And a digging blade 2 provided on the periphery of this triangular plate 24
5 and a flange 26, and a square shaft fitting frame 27 is formed around the valve 21.
0 attached to the drive angle shaft 19, the handle 2
8, and has a threaded digging blade 30 on its outer periphery, and a handle mounting groove 31 and a sleeve 32 at its upper end.
The piston rod 8 is fitted into the hollow pipe 10 in the drive angle shaft 19, and the drive block 6 is fitted into the drive block fitting portion 9. Pile hole drilling equipment.