JP6731507B1 - Pile press-fitting machine and pile press-fitting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pile press-fitting machine and a pile press-fitting construction method having high safety because the earth auger can be rotationally driven at a low position without suspending a heavy earth auger machine with a crane work vehicle. SOLUTION: A base 4 fixed on an existing pile by an existing pile clamp 3, a slide base 5 on the upper surface of the base 4 which can be moved back and forth, and a press-fitting pile installed upright above the slide base 5. A mast 6 as a machine body, a pile press-fitting cylinder 7 and a lifting body 20 which are arranged to be able to move up and down on the side of the mast 6, and a pile gripping device which is arranged below the lifting body 20 to be rotatable. The pile press-fitting machine provided with was equipped with an auger drive device 28 of an earth auger. [Selection diagram] Figure 1

Description

The present invention relates to a pile press-fitting machine and a pile press-fitting method.

A pile press-fitting method using a static load type press-fitting/pulling machine that has been widely used in the past is that a pile made of steel sheet pile is press-fitted into the ground by using a pile press-fitting/pulling cylinder while taking a reaction force with an existing pile, and It is a method of pulling out and is widely used as a pollution-free device with reduced noise. Further, there is also known a method of using a static load type pile press-in/pull-out machine together with an earth auger to press-in and pull-out a pile to a hard ground.

In such a device, it is customary to press the pile first in order to press it firmly into the ground, followed by excavation of the earth auger, but in the case of hard ground where it is difficult to press the pile in advance. It is desirable to adopt a method for facilitating the press-fitting of the pile by excavating this hard part first with an earth auger.

In the following patent documents, a clamp for grabbing piles built side by side in the ground, and a vertically arranged relative to the clamp, which is arranged adjacent to the clamp, and a pile building pitch in a pile parallel direction or more Of the earth auger and a pile of the earth auger and grips from both sides of the earth auger, and a movable gripping member facing each other, and one movable gripping member. And a fixed gripping member which is fixed to the casing of the earth auger and grips a lug extending in the longitudinal direction of the pile auger.
JP-A-60-112925

According to such a pile press-fitting machine, it is possible to precede the earth auger excavation and pile press-fitting from the pile press-fitting precedent, or to change from the earth auger excavation precedent to the pile press-fitting precedent, depending on conditions such as the ground. It is possible to carry out pile press-fitting work.

However, such a conventional pile press-fitting method using static load type pile press-in/pull-out machine supports three-point support when a long pile is press-fitted or the ground is relatively hard such as rubble or earth charcoal. Since it requires a large base machine equipped with a scaffolding, it requires a large space on the work site, and the large scooping machine gives a threat to residents and passersby in the vicinity of the work site. Moreover, there is a drawback that it is difficult to construct on hard ground such as earth charcoal.

Also, for relatively hard ground, it is possible to press fit the pile by using the earth auger together, but the head diameter at the tip of the auger screw cannot be made larger than the outer diameter of the casing, and there is a limit to the excavation performance. In addition to the existing structure, the fixed grip member has a structure along the outer diameter of the casing.Therefore, the positional relationship between the fixed grip member and the casing may be distorted due to distortion of the casing due to welding or transportation at the site, and There is a problem that the piles may not fit into the chuck part of the fixed grip member.

The following patent documents solve the problems that such conventional pile press-fitting machines have, and do not take a particularly large space at the work site, and further enhance the excavation performance of the earth auger for pile press-fitting or withdrawal. It was proposed as an improved workability.
JP, 7-127060, A

As shown in FIG. 10, the pile press-fitting machine is provided with a slide base 5 which can be moved back and forth in the traveling direction on the upper surface of a base 4 which is provided with an existing pile clamp 3 and is fixed on the existing pile 1. A mast 6 as a pile press-fitting/pulling machine main body was erected above the base 5.

A pile press-fitting cylinder 7 and an elevating body 20 are vertically arranged on the side of the mast 6, and a pile (pile) gripping device 8 is rotatably arranged below the elevating body 20.

The slide base 5 provided on the upper surface of the base 4 is configured to have a stroke that is at least twice the pitch of the piles installed, so that the mast 6 and the pile gripping device 8 can be moved by the existing pile clamps 3. Two built-in piles can be press-fitted in the traveling direction from the clamped existing pile 1. 2 is a built-in pile.

As shown in FIG. 11, the pile gripping device 8 is for a casing 13 for earth auger, and has a casing receiving chuck claw 9 having a casing receiving side chuck cylinder 10 and a built-in pile chuck cylinder 12 or a built-in pile. It comprises a chuck claw 11.

When the built-in pile chuck claw 11 is opened, an appropriate space α is provided between the casing 13 and the casing receiving chuck claw 9 with respect to the outer diameter of the casing 13 in the circumferential direction. As will be described later, the casing 13 and the built-in pile 2 can be driven in or pulled out by the pile gripping device 8.

On the other hand, above the abutting portion of the casing 13 with the built-in pile 2, a built-in pile pressing chuck 19 that prevents the casing 13 from falling when the casing 13 is inserted into the pile gripping device 8 is provided.

Further, an earth auger reader 15 is integrally formed with the casing 13 above the built-in pile pressing chuck 19, and an earth auger excavator 16 is vertically arranged on the side of the earth auger reader 15. There is. Reference numeral 17 is an auger screw, and 18 is an auger head.

The casing 13 is provided with a rotation stopping member 14 protruding when the earth auger machine 16 rotates when the pile gripping device 8 is opened, and the pile gripping device 8 has a cutout portion 8a corresponding to the rotation stopping member 14. Formed.

In use, first, the existing pile 1 is clamped by the existing pile clamp 3, the casing 13 and the built-in pile 2 are chucked by using the pile gripping device 8, and the pile press-fitting cylinder 7 serves to press-in or pull-out the built-in pile 2. Carry out the work. At this time, by taking a reaction force with the existing pile clamp 3, it is possible to obtain a stable posture during work.

During the above operation, the casing 13 is in contact with the built-in pile 2 when the pile is press-fitted, and is held by the casing receiving chuck claw 9 and the built-in pile chuck claw 11.

The casing receiving chuck claw 9 and the built-in pile chuck claw 11 are opened and closed by the casing receiving side chuck cylinder 10 and the built-in pile chuck cylinder 12, and the casing receiving chuck claw 9 and the built-in pile chuck claw 11 are opened. The space α provided between the casing receiving chuck claw 9 and the casing is used.

On the other hand, as the work progresses, the clamping position of the existing pile clamp 3 must be sequentially changed in the moving direction, but the existing pile clamp 3 is configured to be slidable at right angles to the moving direction. It is possible to change the clamp position of the existing pile.

To move the pile press-fitting machine body by itself, the existing pile clamp 3 is opened during the press-fitting of the second pile, the pile press-in/pull-out cylinder 7 works to raise the base 4, and the slide base 5 is moved to the first position. Return to. Along with this, the base 4 and the existing pile clamp 3 move forward in the traveling direction by one pitch of the pile.

Next, the existing pile clamp 3 is changed to the meshing position of the existing pile 1, and then the base 4 is lowered. As a result, the press-fitting/pulling-out machine main body can be moved by itself, and the press-fitting work of the pile can be continued by sequentially moving by itself.

The earth auger machine 16 is lowered by its own weight by forward rotation excavation of the auger screw 16, and the pulling is performed by reversing the auger screw 16 and pulling it up while discharging the soil. When it is impossible to pull up due to lack of soil discharge, the crane may be used to hoist the auger machine 16 to assist.

As shown in FIG. 12, as a procedure for assembling the built-in pile, the earth auger machine 16 is lifted by the hook 25 suspended from the wire of the crane 24 provided in the crane work vehicle 23, and the casing 13 is vertically moved. To support. Next, the built-in pile 2 is pulled up using the auxiliary winding wire 26 of the crane 24.

At this time, the metal fittings 21 fixed to the lower part of the casing 13 are hooked on the stoppers 22 fixed to the lower part of the built-in pile 2.

The built-in pile 2 thus pulled up is chucked by the built-in pile holding chuck 19.

Then, as shown in FIG. 13, the casing 13 is inserted into the pile gripping device 8 by a crane, and is firmly chucked by using the casing receiving chuck claw 9 and the built-in pile chuck claw 11.

Next, as shown in FIG. 14, the casing 13 and the built-in pile 2 are simultaneously pressed into the ground by the action of the pile press-fitting cylinder 7 while the earth auger machine 16 is normally rotated.

At this time, if the ground is hard, as shown in FIG. 15, only the earth auger machine 16 is forwardly excavated to reduce the press-fitting resistance.

Next, as shown in FIG. 16, when the press-fitting stroke is completed, the pile gripping device 8 is opened, and the pile gripping device 8 is moved up by the action of the pile press-fitting cylinder 7.

Then, the built-in pile 2 is press-fitted to a predetermined depth by repeating the steps shown in FIGS. 14 to 16.

In addition, when draining or soil pressure at the tip of the built-in pile 2 at the completion of press-fitting is required, as shown in FIG. 17, the preceding excavation by the earth auger machine 16 is stopped and the built-in pile 2 is preceded. .. In this work, if the preceding depth is determined in advance and the pile gripping device 8 is opened and then the earth auger machine 16 is reversed, the casing 13 rises due to the earth discharging force. By this operation, the leading position of the built-in pile 2 can be secured.

Next, as shown in FIG. 18, the upper end of the built-in pile 2 is press-fitted by the pile gripping device 8 to a predetermined height, and the press-fitting work is completed.

The pile press-fitting machine of Patent Document 2 has a great difficulty in safety. It enables an auger-combined press-fitting work to be performed at the same time as press-fitting by a press-fitting/pulling machine with the auger preceding, but as shown in FIG. 12, it is suspended on the wire of the crane 24 provided in the crane work vehicle 23. The earth auger machine 16 is hoisted by the supported hook 25 to vertically support the casing 13, and the auxiliary pile wire 26 of the crane 24 is used to pull up the built-in pile 2. A large load including the earth auger machine 16 may be applied, which may cause the boom to be damaged or the crane 24 to fall.

The object of the present invention is to eliminate the inconvenience of the conventional example, and to rotate and drive the earth auger at a low position without suspending a heavy earth auger machine in a crane work vehicle. To provide a machine and a pile press-fitting method.

In order to achieve the above-mentioned object, the present invention according to claim 1 provides a base fixed on an existing pile by an existing pile clamp, a slide base on the upper surface of the base that is movable back and forth, and above the slide base. A mast as a standing pile press-fitting machine main body, a pile press-fitting cylinder and an elevating body which are vertically arranged on the side of the mast, and a pile gripping device which is pivotably arranged below the elevating body. The pile press-fitting machine provided with is equipped with a ground auger drive motor and a rotation transmission mechanism that is rotationally driven by the drive motor, and the earth auger kelly bar is slidably penetrated through the rotation transmission mechanism and rotated. The earth auger auger drive device provided with the rotating body is provided , and further, the holding body containing the rotating body having the through hole corresponding to the cross section of the keriever is slidably inserted through the earth auger centering the holding body. The gist of the present invention is that a steady rest jig provided with a guide portion that slides and guides with the flange of the sheet pile is provided at the end of the arm extending to the left and right .

According to the present invention as set forth in claim 1, it is possible to perform press-fitting work together with the earth auger, which is always carried out at the same time as press-fitting by the press-fitting machine, and the earth auger is driven by the earth auger provided in the pile press-fitting machine. Since it is carried out by the auger drive device, the crane working vehicle can be carried out at a low position without suspending a heavy earth auger machine.

Further, the earth auger auger drive device is provided with a rotation transmitting mechanism provided with a rotating body which slidably penetrates the earth auger kelly bar and rotates the earth auger's kelly bar. It can be driven and can slide along the kelly bar, so that the excavation of the earth auger can be ensured.

Further, by using together with the steady rest jig provided with the guide portion that slides and guides with the flange of the sheet pile, more stable excavation becomes possible. Further, since this steady rest can be moved along the kelly bar of the earth auger, it is possible to hold the auger head in the vicinity thereof and enable stable excavation.

According to a second aspect of the present invention, as a pile press-fitting method, the pile press-fitting machine of claim 1 is used, and an auger drive device of an earth auger provided in the pile press-fitting machine precedes press-fitting of a sheet pile by a pile press-fitting cylinder. The gist is to rotate the kelly bar of the earth auger and excavate with the auger head at the tip of the kerry bar.

According to the invention of claim 2, in the earth auger combined press-fitting work in which the earth auger precedes and the press-fitting machine press-fits simultaneously, the earth auger auger drive device rotates the earth auger kelly bar, thereby Although excavating with an auger head, the auger drive device of the earth auger is provided on the pile press-fitting machine, and can be performed at a low position without suspending a heavy earth auger machine with a crane work vehicle.

As described above, the pile press-fitting machine and the pile press-fitting construction method of the present invention do not have to suspend a heavy earth auger excavator with a crane work vehicle, and can rotate and drive the earth auger at a low position. It is expensive.

It is a side view showing one embodiment of a pile press-fitting machine of the present invention. It is a top view showing one embodiment of a pile press fitting machine of the present invention. It is a vertical section front view showing one embodiment of a pile press-fitting machine of the present invention. It is a cross-sectional top view of the auger drive device part of the earth auger of the pile press-fitting machine of this invention. It is a top view of the steady rest jig used together with the pile press-fitting machine of the present invention. It is a side view of the steady rest jig used together with the pile press-fitting machine of the present invention. It is a side view which shows the placing process of the pile press-fitting method of this invention. It is a side view which shows the jig removal process of the pile press-fitting method of this invention. It is a side view which shows the jig collection process of the pile press-fitting method of this invention. It is a side view which shows a prior art example. It is a cross-sectional view of a pile gripping device showing a conventional example. It is the whole side view which shows a prior art example. It is a side view which shows the 1st process of a prior art example. It is a side view which shows the 2nd process of a prior art example. It is a side view which shows the 3rd process of a prior art example. It is a side view which shows the 4th process of a prior art example. It is a side view which shows the 5th process of a prior art example. It is a side view which shows the 6th process of a prior art example.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing an embodiment of a pile press-fitting machine of the present invention, FIG. 2 is a plan view of the same as above, and FIG. 3 is a vertical sectional front view of the same. The pile press-fitting machine is provided with an auger drive device 28 for an earth auger. ..

The pile press-fitting machine is as described with reference to FIG. 10 and the like as the above-mentioned conventional example, and on the upper surface of the base 4 fixed on the existing pile provided with the existing pile clamp 3, a slide which can be moved back and forth in the traveling direction. A base 5 is provided, and a mast 6 as a pile press-fitting/pulling machine main body is erected above the slide base 5.

A pile press-fitting cylinder 7 and an elevating body 20 are vertically arranged on the side of the mast 6, and a pile (pile) gripping device 8 is rotatably arranged below the elevating body 20.

The slide base 5 provided on the upper surface of the base 4 is configured to have a stroke that is at least twice the pitch of the piles installed, so that the mast 6 and the pile gripping device 8 can be moved by the existing pile clamps 3. Two built-in piles can be press-fitted in the traveling direction from the clamped existing pile 1. 2 is a built-in pile. The built-in pile 2 is a sheet pile, and has claw flanges that serve as joints at the left and right ends of the U-shaped plane.

An opening 27 through which the built-in pile 2 is inserted is formed in the lifting body 20, and a built-in pile chuck claw 11 and a built-in pile chuck cylinder 12 are provided with this opening 27 in between, and the built-in pile chuck cylinder 12 The side surface of the built-in pile 2 can be chucked.

The earth auger auger drive device 28 includes a ground auger drive motor 29 and a rotation transmission mechanism 30 that is connected to the drive motor 29 via a speed reducer 32 and is rotationally driven by the drive motor 29. The transmission mechanism 30 is provided with a rotating body 31 which slidably penetrates a kelly bar 33 of an earth auger and rotates.

The rotating body 31 is a cylindrical body having a through hole through which the kelly bar 33 of the earth auger penetrates, and the through hole has a hexagonal or triangular cross section corresponding to the cross section of the kelly bar 33. The rotating body 31 hangs below the elevating body 20 with a certain length.

As shown in FIGS. 5 and 6, a steady rest 34 is also used in the pile press-fitting machine.

The steady rest jig 34 has a guide portion 38 that slides and guides with a flange of a sheet pile at an end of an arm 37 that extends to the left and right centering on a holding portion main body 36 that houses a rotating body 35 that slidably penetrates the kelly bar 33 of the earth auger. Was established.

The rotating body 35 is provided with a hexagonal or triangular through hole corresponding to the cross section of the kelly bar 33, and is rotatable with respect to the holding portion main body 36 via a bearing or the like.

Further, the guide portion 38 has a groove with which a joint at the flange end of the sheet pile is engaged.

Next, the pile press-fitting method of the present invention will be described based on the usage of the pile press-fitting machine.
In use, first, the existing pile 1 is clamped by the existing pile clamp 3, the built-in pile 2 is chucked by using the pile gripping device 8, and the pile press-fitting cylinder 7 works to press-fit the built-in pile 2. At this time, a stable posture can be obtained during work by taking a reaction force from the existing pile by the existing pile clamp 3.

The built-in pile chuck claw 11 is opened and closed by the built-in pile chuck cylinder 12.

On the other hand, as the work progresses, the clamping position of the existing pile clamp 3 must be sequentially changed in the moving direction, but the existing pile clamp 3 is configured to be slidable at right angles to the moving direction. It is possible to change the clamp position of the existing pile.

To move the pile press-fitting machine body by itself, the existing pile clamp 3 is opened during the press-fitting of the second pile, and the base 4 is raised by the action of the pile press-fitting cylinder 7, and the slide base 5 is moved to the first position. return. Along with this, the base 4 and the existing pile clamp 3 move forward in the traveling direction by one pitch of the pile.

Next, the existing pile clamp 3 is changed to the meshing position of the existing pile 1, and then the base 4 is lowered. As a result, the press-fitting/pulling-out machine main body can be moved by itself, and the press-fitting work of the pile can be continued by sequentially moving by itself.

As the procedure for assembling the built-in pile, the hook 25 suspended from the wire of the crane 24 provided in the crane work vehicle 23 (see FIG. 12) is used, and the kelly bar 33 of the earth auger and the swivel 39 are set as shown in FIG. Suspend freely through.

At this time, the kelly bar 33 is slidably penetrated through the rotation transmission mechanism 30 of the auger drive device 28 of the earth auger.

The auger head 18 of the earth auger is positioned below the tip of the built-in pile 2, and the steady rest jig 34 is set near the tip of the built-in pile 2.

The built-in pile 2 is chucked by the built-in pile presser chuck 19, the auger head 18 is rotated while the auger drive device 28 is normally rotated, and the built-in pile 2 is simultaneously pressed into the ground by the action of the pile press-fitting cylinder 7. ..

For the excavation with the auger head 18, the earth auger auger drive device 28 provided in the pile press-fitting machine rotates the earth auger kelly bar 33, and the auger head 18 at the tip of the kerry bar excavates.

Next, when the press-fitting stroke is completed, the pile gripping device 8 is opened, and the pile gripping device 8 is moved up by the action of the pile press-fitting cylinder 7.

Then, by repeating the above steps, the built-in pile 2 is press-fitted to a predetermined depth.

In addition, when draining or earth pressure of the tip portion when the press-fitting of the built-in pile 2 is completed, the pre-excavation by the auger drive device 28 of the earth auger is stopped and the built-in pile 2 is advanced. In this work, the preceding depth is determined in advance, the pile gripping device 8 is opened, and then the auger drive device 28 is reversed.

In this way, the pile gripping device 8 press-fits the upper end of the built-in pile 2 to a predetermined height to complete the press-fitting work.

After the press-fitting work is completed, as shown in FIGS. 8 and 9, the steady rest jig 34 is removed from the built-in pile 2 and collected.

In addition, the pile press-fitting machine can also perform the work of pulling out the existing pile, and at that time, an auger may be used.

1... Existing pile 2... Built-in pile 3... Existing pile clamp 4... Base 5... Slide base 6... Mast 7... Pile press-fitting cylinder 8... Pile gripping device 8a... Notch 9... Casing receiving chuck claw 10... Casing receiving side chuck Cylinder 11... Built-in pile chuck claw 12... Built-in pile chuck Cylinder 13... Casing 14... Rotation stop member 15... Earth auger leader 16... Earth auger machine 17... Auger screw 18... Auger head 19... Built-in pile press chuck 20 ... Lifting body 21... Hanging fitting 22... Stopping fitting 23... Crane work vehicle 24... Crane 25... Hook 26... Supplementary winding wire 27... Opening 28... Auger drive device 29... Drive motor 30... Rotation transmission mechanism 31... Rotating body 32... Reducer 33... Kerry bar 34... Steady stop jig 35... Rotating body 36... Holding part body 37... Arm 38... Guide part 39... Swivel

Claims (2)

A base fixed on an existing pile by an existing pile clamp, a slide base on the upper surface of the base that can be moved back and forth, a mast as a pile press-fitting machine main body installed above the slide base, and the mast. a pile press-fitting the cylinder and the lift member that is disposed vertically movably to the side of, the pile press-machine provided with a pile gripping device which is pivotally disposed below the lifting body, the motor for driving the earth auger And a rotation transmission mechanism that is rotationally driven by the drive motor, the rotation transmission mechanism is provided with an earth auger auger drive device provided with a rotating body that slidably penetrates the earth auger kelly bar and rotates . Furthermore, a guide that slides through the flange of the seat pile to the arm ends that extend to the left and right centering on the main body of the holding part that has a built-in rotating body that has a through hole that matches the cross section of the kerry bar that slidably penetrates the kelly bar of the earth auger. A pile press-fitting machine that is equipped with a steady rest with a section . Using the pile press-fitting machine according to claim 1, prior to the press-fitting of the sheet pile by the pile press-fitting cylinder, the auger driving device of the earth auger provided in the pile press-fitting machine is used to rotate the kelly bar of the earth auger, and the auger head at the tip of the kerry bar is used. A pile press-fitting method characterized by excavation.