JPH0689543B2 - Pile press-fitting device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile press-fitting device for steel sheet piles and the like, and more particularly to a pile press-fitting device capable of preventing forward collapse of a press-fitted pile during press-fitting.

[0002]

2. Description of the Related Art Steel piles, such as steel sheet piles, are continuously press-fitted in construction work dam works, sewer dam works or revetment works. At the time of this press-fitting, steel piles are connected to the front end piles of the existing pile rows one after another. I will press in a new pile. The conventional pile press-fitting device has a clamp 5 in which an existing pile 50 is formed in the lower part of the device as shown in FIG.
While sandwiching by 3, the device main body is advanced in the press-fitting advance direction of the pile, and the chuck 51 is slid up and down along the sliding portion 52 to press-fit the pile 50a.

Since the top A of the existing pile 50 is horizontal, in the device supported on the existing pile 50 by the clamp 53, the saddle 54 and the slide base 56 of the mast 55 are horizontal, and the top A of the existing pile 50 is the same. The sliding portion 52 is configured to be vertical, and when press-fitting the pile, pressure is applied to the pile 50a in the vertical direction.

[0004]

As shown in FIG. 3, in the conventional pile press-fitting device, when the pressure F is vertically applied to the press-fitting pile 50a and press-fitted, the tip penetration resistance force against the press-fitting force F and The circumferential surface friction resistance force RO acts as a reaction force, and the grip resistance R of the grip portion 57 between the existing pile 50 and the press-fitting pile 50a is generated, so that the press-fitting pile 50a has an inclination moment M.
As a result, the press-fitting pile 50a is inclined in the press-fitting advance direction B, causing a so-called forward tilt phenomenon.

Since this forward tilting increases with the progress of the press-fitting of the piles and finally the press-fitting becomes impossible, conventionally, a wedge sheet pile 58 (punch sheet pile) has been mounted as shown in FIG. 4 to correct it. In this case, the wedge sheet pile 58 must be prepared in addition to the pile 50, and it is necessary to make appropriate corrections at an appropriate time during the pile press-fitting work, which is troublesome and troublesome.

Therefore, in view of preventing the pile from falling forward and accumulating the tolerance of each sliding portion of the pile press-fitting device, the pile press-fitting device is always set on the existing pile only at an angle of θ in the press-fitting advancing direction. It is necessary to incline and set. This was done by floating the rear part of the pile contact surface of the clamp 53, but such an operation is time-consuming and largely depends on the operator's operation technique, so that the correct setting is not always performed. .

[0007]

The present invention has been made to solve the above-mentioned problems, and it is mounted on an existing pile by a clamp provided at the lower part of the main body of the apparatus and can be self-propelled in the press-fitting traveling direction of the pile. In a pile press-fitting device in which a pile is clamped and press-fitted by a chuck that moves up and down along a sliding portion at the front end of a mast configured via a slide base on a saddle, the slide base provided with the sliding portion is supported. The thickness of the saddle is gradually reduced toward the press-fitting advancing direction of the pile, the sliding portion is inclined to the press-fitting advancing direction of the pile, and a means for applying a force input to the pile in a direction opposite to the press-fitting advancing direction is provided. Characterize.

[0008]

[Function] The press-fitting pile is sandwiched by the pile chucks formed on the front part of the main body of the apparatus, and the press-fitting pile is engaged with the grip portion of the front end pile of the existing pile and press-fitted. In this case, the thickness of the saddle that supports the slide base provided with the sliding portion is gradually reduced in the pile press-fitting advancing direction, and the sliding portion at the front end of the mast is inclined in the press-fitting advancing direction of the pile. Since the press-fitting pile is press-fitted in the direction opposite to the press-fitting advancing direction, the press-fitting pile has a force to cancel the tilting moment due to the resistance generated between the existing pile and the grip part.
It can be pressed in without tilting the pile in the press-fitting direction.

[0009]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a front view of an embodiment of the present invention. In the figure, 1 is an existing pile, and these existing piles 1, 1
··· are connected to each other by grip portions 1a, 1a ···, and the top ends A, A · · are horizontally press-fitted at a predetermined height from the ground surface. A pile press-fitting device 3 is placed on the piles 1, 1 ,. 3 below the saddle 4 of the pile press-fitting device 3
The individual clamps 5 are provided, these clamps are slidable in the left-right direction with respect to the traveling direction, and their positions can be adjusted according to the size of the pile 1.

On the saddle 4, a slide base 7 provided on the leg portion of the mast 6 is slidably provided. A sliding portion 8 is provided at the front end of the mast 6 in a direction perpendicular to the upper surface of the saddle 4, and a chuck 10 for pinching a pile is vertically movable and rotatable on the sliding portion 8 via an arm 9. It is installed.

The thickness of the saddle 4 is gradually reduced in the direction in which the pile is press-fitted. Therefore, the pile press-fitting device 3 is set on the pile 1 in a state in which the sliding portion 8 is inclined in the press-fitting traveling direction B of the pile by an angle θ with respect to the press-fitting direction of the press-fitting pile 11.

Next, the press-fitting action of the pile by this pile press-fitting device will be described. First, the device 3 is fixed and placed on the existing piles 1, 1 ... by the three clamps 5 on the lower surface of the saddle 4.
Next, the slide base 7 is fixed at a predetermined position according to the size of the piles 1 and 11, and the arm 9 is moved to the uppermost point of the sliding portion 8. In this state, the pile 11 to be newly press-fitted is clamped by the chuck 10, the pile 11 and the grip portions 11a, 1a of the existing pile 1 are engaged with each other, and the chuck 10 is lowered to start the press-fitting of the pile 11.

By the way, in the pile press-fitting apparatus of this embodiment, since the thickness of the saddle 4 is gradually reduced in the pile press-fitting advance direction as described above, when the pile press-fitting apparatus 3 is placed on the existing pile, the sliding force is reduced. The moving part 8 automatically inclines at an angle of θ with respect to the press-fitting traveling direction B of the pile 1.

In this state, when the pile 11 is installed in parallel with the existing pile 1 and press-fitting is started, the clamp 5, the saddle 4, and the saddle 4 are placed.
And the slide base 7, the sliding portion 8 and the arm 9, and the sliding portion 8 by the cumulative tolerance of the sliding portions of the arm 9 and the chuck 10.
Of the pile moves slightly in the direction opposite to the press-fitting traveling direction B of the pile, and the angle θ becomes slightly smaller. At this time, the direction of the sliding portion 8 is adjusted to cancel the inclination moment M due to the resistance of the grip portions 1a and 11a, so that the press-fitting pile 11 can be press-fitted in the press-fitting traveling direction B without tilting.

This force relationship will be described with reference to FIG.
With the grip 10a of the chuck 10 on the pile 11 as a fulcrum,
A press force F is applied to the pile 11 along the press fit direction V. This pressure input F is decomposed into a horizontal component F1 and a vertical component F2,
The horizontal component force F1 cancels the inclination moment M, so that the pile 11 is press-fitted vertically as described above.

[0016]

Since the pile press-fitting device according to the present invention is provided with the means for inclining the sliding portion so as to apply a force input to the pile in the direction opposite to the press-fitting advancing direction, it occurs in the grip portion of the pile when press-fitting the pile. A horizontal component force is generated to counteract the tilting moment due to the grip resistance, and the pile can be press-fitted without tilting in the press-fitting advancing direction, thus eliminating forward tilting.

Further, when the pile press-fitting device is placed on the pile, the upper portion of the sliding portion is moved due to the tolerance of each sliding portion of the machine, and the inclination moment due to the resistance of the grip portion of the pile is taken into consideration. It is possible to determine that the pile press-fitting device should be pressed in parallel with the pile, and the operation of setting the pile press-fitting device on the pile during press-fitting is easy, and no special operation technique of the operator is required for this operation. Therefore, the press-fitting work of the pile becomes accurate, and the efficiency thereof is improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a front view of a conventional pile press-fitting device.

FIG. 3 is an explanatory view showing a state in which the pile leans forward.

FIG. 4 is an explanatory view showing a state of correction with a wedge sheet pile.

FIG. 5 is an explanatory view showing the relationship of the press input when press-fitting the pile of the embodiment of the present invention.

[Explanation of symbols]

 1 Pile 11 Pile 1a Grip part 11a Grip part 3 Pile press-fitting device 4 Saddle 5 Clamp 6 Mast 8 Sliding part 9 Arm 10 Chuck A Pile top end B Pile press-fitting advancing direction θ Inclination angle

Claims (1)

[Claims] 1. A clamp provided on the lower part of the main body of the device, mounted on an existing pile, capable of self-propelled in the press-fitting traveling direction of the pile, and a sliding portion of a mast front end formed on a saddle via a slide base. In a pile press-fitting device in which a pile is clamped and press-fitted by a chuck that moves up and down along it, the thickness of a saddle supporting a slide base provided with the sliding portion is gradually reduced in the pile press-fitting advancing direction, A pile press-fitting device comprising means for inclining a moving part in a pile press-fitting advancing direction and applying a force input to the pile in a direction opposite to the press-fitting advancing direction.