JPS6221932B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a method for pushing shaped steel piles,
When driving steel piles and sheet pile piles of various shapes, a huge driving device with a pile leader is used, making it impossible to drive the piles in particularly narrow spaces. There is also a method of obtaining the reaction force of a pile driving machine or a pushing machine from an earth auger, but with this conventional method, the reaction force obtained is small, causing problems in terms of work efficiency.

The present invention relates to a crane vehicle (hereinafter referred to as a "work vehicle") to be used.
That's what it means. ) is also small and does not require a leader to support the form steel, and the excavation agitation at the pile pushing point and the digging to obtain the reaction force of pile pushing are performed by operating separate mechanisms that constitute the same earth auger, and the pile The aim is to increase the pushing force and improve the efficiency of pile pushing.

A detailed explanation will be given below with reference to the drawings.

Figure 1 is an explanatory partial cross-sectional view of a device consisting of a working vehicle, an earth auger, and a pile driving machine used in the steel pile driving method of the present invention, in which 1 is a working vehicle, 2 is a crane, and 3 is a device suspended from the crane. The drive motor 4 is an earth auger that is connected to the drive motor 3 so that it can be interlocked with the drive motor 3. 5 is the auger shaft, 6 is the anchor shaft of the screw anchor 7, and 8 is the screw. 9 is a pile pushing machine, 10 is an outer cylinder of a hydraulic cylinder 14,
It has an inner cylinder and a hydraulic cylinder inside.
Reference numeral 12 denotes a rotation support arm, one end of which is rotatably attached to the outside of the drive motor 3, and the other end rotatably attached to the outer cylinder 10. The anchor shaft 6 is detachably connected to a drive shaft 13 of the drive motor 3. 11 is a wire, and 15 is a hook.

Next, the earth auger 4 will be explained. Second
The figure is an explanatory cross-sectional view of the earth auger 4. The earth auger has (a) an auger shaft 5 having a spiral excavation blade 16 on its outer periphery, and (b) a drive shaft 13 of a drive motor 13 that is fitted into the auger shaft 5 and can be connected to the head with a pin 18. (c) a screw anchor 7 consisting of a hollow anchor shaft 6 into which an azimuth rod 21 having a screw 8 at its tip is fitted; The anchor shaft 6 is connected to an adjuster rod 21 by a pin 23 at its lower end. In addition, 24 is a pin hole provided in the anchor shaft 6, and 24-1, 24-2, 24-3 are pin holes provided in the anchor shaft 6 provided in the shaft rod 21.
This is a pin hole for connection with. Further, 25 is a drive shaft head stopper, 26 is a head stopper of the auger shaft 5, and 27 is a rotating frame on which the drive shaft 19 is rotatably fitted.

Next, the clutch mechanisms of the auger shaft 5, drive shaft 19, and anchor shaft 6 will be explained.

In the earth auger 4, a hollow drive shaft 19 configured to be connectable to the drive motor 3 is inserted into a hollow auger shaft 5 having a spiral excavation blade 16 on the outer periphery. , the anchor shaft 6 of the screw anchor 7 is inserted and inserted, and the drive motor 3 connects the auger shaft 5 and the anchor shaft via the drive shaft 19 by engaging clutches provided at appropriate positions in each of these parts. 6 can be rotated separately. That is, as shown in FIG. 2, the auger shaft 5 is provided with an auger shaft upper clutch 17 at its upper position and a lower auger shaft clutch 20 at its lower position.

Further, a drive shaft clutch 22 is provided at a substantially intermediate position of the drive shaft 19, and an anchor shaft clutch 28 is provided at an upper position of the anchor shaft 6, so that each clutch can be engaged as required. ing. In addition, 29 is a sleeve provided between the auger shaft 5 and the drive shaft 19, 30 is its stopper, and 31 is an anchor shaft stopper. The engagement of each clutch is such that the driveshaft clutch 22 is engaged with the anchor shaft clutch 28, and the driveshaft clutch 22 is engaged with the lower auger shaft clutch 2.
The drive shaft clutch 22 is configured to fit and mesh with the auger shaft upper clutch 17.

Next, a pile pushing machine, which is an embodiment of the present invention, will be explained.

As shown in FIG. 3, the pile driving machine includes a chuck 33 having a wedge 32, a chuck suspension tube 34 by which the chuck is suspended, a bolt 35, a wedge suspension tube 36, an inner tube 37, an outer tube 10, and The hydraulic cylinder 14 is mounted inside the outer cylinder 10 and inserted into the inner cylinder 37, and the tip of the shaft 39 is placed close to the upper part of the wedge suspension cylinder 36 and the hydraulic cylinder 14 is inserted into the inner cylinder 37. Rack portion 40 provided within the suspension tube 34
A chuck suspension cylinder 34 is rotatably jointed to the chuck via a connecting member. 41 is the connecting fitting.

The chuck suspension tube 34 is fitted into the inner tube 37, and the wedge suspension tube 36 is fitted into the chuck suspension tube 34, respectively. Further, the inner cylinder 37 is configured to be slidable on the outer cylinder 10, and 42 is a sleeve thereof, and 43 is a sleeve thereof.
44 is an inner cylinder upper stopper, 45 is a stopper attached to the outer cylinder, and 46 is an outer cylinder end.

FIG. 3B is an explanatory cross-sectional view showing the chuck connection mechanism. In the lower part of the inner cylinder 37, a pin hole 47 provided in the lower part of the inner cylinder, a pin hole 48 provided in the chuck suspension cylinder 34, and a wedge Pin hole 4 provided in hanging tube 36
A pin 50 is inserted into 9 to connect them so that they can rotate simultaneously. Note that the pin hole 48 of the chuck suspension tube 34 is made vertically long and larger than the other pin holes 47 and 49, but the length obtained by subtracting the diameter of the pin 51 from the vertical length, that is, the vertical movement distance of the chuck 33 is from the stroke of the hydraulic cylinder 14 to the outer cylinder 3.
8, and this distance is equal to the horizontal distance that the wedge 32 moves within the chuck 33, as described above. That's right.

In addition, the wedge 32 is attached to a suspension rack 51 provided in a wedge suspension tube 36 by means of bolts 35, so that the wedge 32 can be attached to a suspension rack 51 provided in a wedge suspension tube 36.
It is mounted with a gap 52 that allows it to move left and right to some extent.

Note that the stroke B of the inner cylinder 37 by the hydraulic cylinder 14 is the length of the inner cylinder upper stopper 43 and the outer cylinder stopper 45, as shown in FIG. 3A.
This stroke B is from the stroke A of the shaft 39 of the hydraulic cylinder 14 to the stroke A of the shaft 39 of the hydraulic cylinder 14.
From the length of the vertical pin hole 48 provided in the pin 5
It is configured equal to the length minus the diameter of 0,
This length is equal to the distance that the chuck suspension tube 34 moves up and down within the inner tube 37 and the distance that the wedge 32 moves horizontally within the chuck 33.

Therefore, as shown in FIG. 3A, the outer cylinder end 46
When the wedge 32 is in contact with the inner cylinder lower stopper 44, the wedge 32 does not bite the stake 57.

Further, the wedge 32 is of course attached to the chuck 33, and as is known in the art, the wedge 32 is moved horizontally by the rollers 53 to bite the stake, but the wedge of this embodiment is As shown in FIG. 6, a concave arc groove 54 is provided in the center of the engaging surface. Furthermore, 55
is a bolt hole, and a bolt 35 is passed through the hole to suspend it from a suspension rack 51 of a wedge suspension tube 36. Next, the chuck 33 is provided with a T-shaped sheet pile insertion groove 56, and together with the concave arc groove 54 of the wedge 32, it can be applied to any type of pile such as a T-shaped corner pile or a W-shaped corner pile. It is characterized by the fact that it is formed in

Next, the effects of the present invention will be explained.

FIG. 4 is an explanatory diagram showing the order of excavation by the earth auger. First, the work vehicle 1 is placed at an appropriate position on the work site, the earth auger is lifted by the hook 15 of the crane 2, and the drive shaft 13 of the drive motor 3 is lifted. is attached to the drive shaft 19 of the earth auger 4, and then the earth auger 4 is erected by operating the crane 2, and the drive motor 3 is rotated gently to fit the anchor shaft clutch 28 of the anchor shaft 6 into the drive shaft clutch 22. In such a case, the drive shaft 19 will be pulled out much higher than the head of the auger shaft 5, as shown in FIG. 4A. Next, when the drive motor 3 is rotated, the drive shaft 19 and the anchor shaft 6 are rotated. When this happens, the adjuster rod 21 with the screw 8 rotates at the same time, and the screw anchor 7 digs into the ground as shown in FIG. 4B. When the screw anchor 7 has been sufficiently dug, the screw anchor 7 stops digging, and the drive motor 3 is activated to disengage the drive shaft clutch 22 and the anchor shaft clutch 28, and then the lower auger shaft clutch 20 The drive shaft clutch 22 is then driven by the drive motor 3 to gently shift the drive shaft 1.
Engage while rotating 9. In this case, the drive shaft 19 and the auger shaft 5 are in a state of rotation at the same time.

Next, when the auger shaft 5 is rotated by the drive motor 3, the auger shaft 5 digs into the soil by the action of the spiral excavation blade 16, and while stirring the place where the pile is pushed in, it fully reaches the position of the screw 8 as shown in FIG. 4C. After digging, the rotation of the auger shaft 5 is stopped.

After the earth auger 4 is sufficiently dug into the soil by repeating the clutch engagement change and digging as described above, the auger shaft upper clutch 17 is
The drive shaft clutch 22 and the anchor shaft clutch 28 are engaged with each other, and the entire earth auger 4 is rotated in the opposite direction by the operation of the drive motor 3 and pulled up to the ground.Then, the next pile pushing position is excavated in the order of operation as described above. dig. At this time, after the earth auger 4 is dug to an appropriate depth as shown in FIG. The steel pile 57 is erected at the first excavated pile pushing position.
Once the chuck 33 has penetrated into the soil to some extent under its own weight, the chuck 33 is attached to the top of the shaped steel pile 57. When it happens,
Existing shaped steel piles of various shapes shown in FIG. 6 fit completely into the pile fitting groove 56. Moreover, the structure is such that the chuck 33 can freely rotate 360 degrees within the outer cylinder 38 together with the inner cylinder 37 no matter what direction the shaped steel pile 57 is pushed in with respect to the work vehicle. However, it is possible to capture it completely with a chuck 33. Shaped steel pile 57
When the chuck 33 is inserted into the chuck 33, the hydraulic cylinder 14 is operated to extend the shaft 39, and the chuck 33 presses the shaped steel pile 57 by its pressing force and pushes it into the soil. At this time, since the screw anchor 7 is deeply dug into the soil and the rotary support arm 12 connects the pushing machine and the drive motor, the reaction force of the pile pushing machine can be obtained from the screw anchor. .

Conventionally, in this type of pile driving method, the earth auger 4 did not have a screw anchor 7 as in the present invention, so the reaction force of the chuck 33 was actually obtained from the auger shaft 5. However, in this method, since the soil around the auger shaft 5 is sufficiently agitated, the resistance for obtaining the reaction force is small, and therefore the reaction force must also be small, resulting in a decrease in the pushing force.

When using the method of the present invention, the auger shaft 5
It penetrates much deeper into the soil than the
Since the number of blades of the screw 8 is the minimum and the stirring density of the surrounding soil is also extremely small, a large reaction force can be obtained, and the pushing force applied to the shaped steel pile 57 is also large.

Once the shaped steel pile 57 has been pushed to the full length of the shaft of the hydraulic cylinder as described above, the auger shaft 5 is rotated again to stir the excavation, and then the screw anchor 7 is rotated and excavated to prepare for obtaining a reaction force. None, plus hydraulic cylinder 14 and chuck 33
The operation of pushing the shaped steel pile 57 is repeated.

FIG. 5 is an explanatory diagram of the pushing operation. During the pushing operation, if the soil is soft, the pushing reaction force will be small, so use the pin holes 24-1, 24-2, 24-3 to pull out the azimuth rod 21 long from the anchor shaft 6 in advance and attach it to the screw anchor. If the overall length of the screw anchor 7 is made longer, the screw anchor 7 can be dug deeper into the soil, thereby making it possible to obtain a sufficient reaction force.

Next, we will discuss the effects of the pile pushing machine. As mentioned above, the chuck 33 is fitted with the wedge 32 and inserted into the inner cylinder 3.
7 and the wedge suspension tube 36 so as to rotate 360 degrees at the same time, the shaped steel pile 57 can be pushed into the center of the work vehicle in any direction. Also, the chuck 33 is the sixth
As shown in Figure A, the steel pile insertion groove 56 is formed in a vertical and horizontal T-shape, so it can be used for T-shaped corner piles and W-shaped corner piles as shown in Figures C and D. Since the wedge 32 has a concave arc groove 54 formed in its center, it can be used as a shaped steel pile of a special shape such as a sheet pile, which has arc-shaped concave grooves 54-1 and 54-2 in its center, as shown in FIG. 6E. It can also be used for In addition, the force for pushing the shaped steel pile is applied to the shaft 19 of the hydraulic cylinder 14, which is connected to the chuck suspension tube 34 via the connecting fitting 41. Therefore, when the chuck 33 is mounted on the shaped steel pile and the shaft 19 is extended, the shaft 19 of the hydraulic cylinder 14 is The cylinder 34 is lowered, and at the upper edge of the pin hole 48, the pin 50 connects the inner cylinder 37 and the wedge-suspended cylinder 3.
Becomes one with 6. At this time, the effective vertical movement distance H of the pin hole 48 formed in the chuck suspension tube 34 is:
Since the length is determined by subtracting the stroke of the inner cylinder 37 within the outer cylinder 38 from the stroke of the hydraulic cylinder shaft 39, the sheet pile pile 57 can be moved into the ground while utilizing the reaction force of the anchor shaft 7 until the entire stroke of the cylinder shaft. It is possible to push inside. At this time, it is natural that the wedge 32 is in a floating state within the chuck 33 and does not bite the shaped steel pile 57. Therefore, the force for pushing the shaped steel pile 57 is applied equally to the inner cylinder 37 and the chuck suspension pipe 34, the chuck 33 pushes the shaped steel pile 57, and the wedge 32 does not have a pushing action.

In addition, if the resistance during this pushing operation is large and it is difficult to push in, operate the hydraulic cylinder 14 to slightly raise the chuck suspension tube 34, so that the wedge 32 is moved to the shaped steel pile 5.
7, the shaped steel pile 57 can be easily pushed in by repeating the operation of pulling out the shaped steel pile 57 a little with the hydraulic cylinder 14 and pushing it in again. Furthermore, if the adjuster rod 21 is extended from the beginning of the work, the pushing reaction force can be increased.

Next, in addition to the above-mentioned configuration of the pin hole 48, the wedge 32 has considerable gaps 52 in both the top, bottom, front, back, left, and right in the wedge suspension tube 36, so that the suspension rack 51
Since the shaft 39 of the hydraulic cylinder 14 is extended and contracted, the inner cylinder 3 is suspended by a bolt 35.
7. By moving the chuck suspension pipe 34 up and down, it is possible to automatically engage or release the shaped steel pile 57. The wedge used in conventional pushing machines cannot be easily released after digging into the pile, and the wedge is struck with a hammer or the like to release the wedge. This is not necessary in the case of a pusher, and the work can therefore be carried out extremely efficiently. Further, since the wedge 32 and the chuck 33 rotate in any direction through 360 degrees, it is possible to push the shaped steel pile into the working vehicle in any direction.
It goes without saying that the type steel pile pushing machine used in the method of the present invention is not limited to the pushing machine shown in this embodiment.

Further, the shaped steel piles pushed in by the method of the present invention are usually pulled out upon completion of the required construction work, but it is natural that the earth auger and pile pushing machine of the present invention can be used to pull out these piles as well. .

As described above, in the case of the present invention, using the same earth auger and the same drive motor, the auger shaft excavates the part where the shaped steel pile is pushed, and the pushing reaction force of the pile pushing machine is obtained by digging the screw anchor. By adopting this method, it became possible to improve the efficiency of pile driving.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of the apparatus used in the present invention, and the earth auger is shown in a schematic cross-sectional view. FIG. 2 is a cross-sectional explanatory diagram of the earth auger. Figure 3 shows an example of a type steel pile pushing machine.
is a schematic cross-sectional explanatory view thereof, and B is a partial cross-sectional explanatory view showing the chuck connection mechanism. Figure 4 shows
This is an explanatory diagram showing the order of excavation by the earth auger, where A shows the state where the crane is erected at the required location, B shows the state where the screw anchor is made to dig, and C shows the state where the auger shaft is made to dig. . FIG. 5 is an explanatory diagram showing a state in which the shaped steel pile is pushed in. Figure 6 is a perspective explanatory diagram of a chuck and a wedge, and a perspective explanatory diagram of various shaped steel piles, where A is a chuck, B is a wedge, C is a T-shaped corner pile, and D
is a W-shaped corner pile, E is a concave groove pile, and F is an H-shaped steel.

Claims (1)

[Scope of Claims] 1. A screw anchor that is connected to a drive motor suspended from a crane of a working vehicle and that is installed inside the auger shaft and can be rotated and excavated separately from the auger shaft by the same drive motor. An earth auger is used, and the auger shaft is used to excavate and stir the part where the shaped steel pile is pushed, and the pushing reaction force of the shaped steel pile pushing machine is obtained from the screw anchor that is driven deeper into the soil than the auger shaft, and the shaped steel pile is pushed in. A method for pushing shaped steel piles that does not require a pile leader. 2. A hollow drive shaft configured to be able to interlock with a drive motor at the head is inserted into an auger shaft having a spiral excavation blade on the outer periphery, and an adjuster rod having a screw at the tip and an adjuster rod having a screw at the tip thereof are inserted into the drive shaft so as to be removable and retractable. A screw anchor consisting of an anchor shaft is fitted into the screw anchor, and the auger shaft and drive shaft, and the drive shaft and anchor shaft are respectively engaged by engagement of clutch mechanisms provided at appropriate positions. An earth auger for use in a method for driving shaped steel piles, characterized in that an auger shaft and an anchor shaft are configured to rotate and excavate separately using the same drive motor linked to a drive shaft.