JPH05247937A - Pile force-in device - Google Patents

Abstract

PURPOSE:To prevent a pile from falling forward by reducing gradually size of parts upper than striking faces of piles of clamps toward the force-in advance ment to incline a sliding section in the direction of the pile force-in advance ment, and applying force-in force opposite to the direction of the force-in advancement to the pile. CONSTITUTION:A force-in pile 11 is held by a pile chuck 10 formed on the front of a device body and is interlocked with grips 1a of the front end piles 1 of the existing piles 1 to make the force-in of the pile 11. At that time, gaps a, b and c of parts upper than striking faces of piles of clamps 5 are set in size of a, b, c, and a sliding section 8 on the front end of a mast 6 is inclined to theta deg. against the force-in advancement direction B of the pile. Then, force-in force opposite to the force-in advancement direction B is applied to the pile 11 to make the force-in thereof, so that force to deny inclination moment is generated by resistance occurring between the existing piles 1 and the grips 1a. According to the constitution, the pile is not inclined in the force-in advancement direction B, and work efficiency of the pile force-in can be promoted.

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 a pile to be press-fitted from falling forward during press-fitting.

[0002]

2. Description of the Related Art Steel piles, such as steel sheet piles, are continuously press-fitted in construction work cliffs, sewer cliffs, or seawalls. At this time, the piles are connected to the front end piles of the existing pile row one after another. Insert new piles into. 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 holding the pile 50, the apparatus 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 end 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 end A of the existing pile is 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 into the press-fitting pile 50a, the tip penetration resistance force against the press-fitting force F is reduced. 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 inclines in the press-fitting traveling 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 becomes impossible to press-fit, conventionally, as shown in FIG. 4, a wedge sheet pile 58 (punch sheet pile) was struck and corrected. In this case, in addition to the pile 50, a wedge sheet pile 58 must be prepared, 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 order to prevent the pile from falling forward and to accumulate 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 θ in the press-fitting advance direction. It is necessary to incline and set. This is 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 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 the pile press-fitting device that clamps and presses the pile with a chuck that moves up and down along the sliding portion of the mast front end that is configured on the saddle via a slide base, each of the clamps provided at the bottom of the device main body A means for gradually reducing the dimension of the portion above the contact surface in the pile press-fitting advancing direction, inclining the sliding portion in the pile press-fitting advancing direction, and applying a force input to the pile in a direction opposite to the press-fitting advancing direction. It is characterized by having.

[0008]

[Operation] The press-fitting pile is held by the pile chuck formed at the front part of the main body of the device, and is press-fitted by engaging with the grip portion of the front end pile of the existing pile. In this case, the size of the part above the contact surface of the pile of each clamp that supports the device main body on the existing pile is gradually reduced in the pile press-fitting advance direction, and the sliding part at the front end of the mast moves in the pile press-fitting advance direction. Since it is inclined and press-fitting is applied to the pile by applying a force input 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. Can be pressed in without tilting in the direction of travel.

[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.

The upper surface of the saddle 4 is formed parallel to the lower surface and the surface is flat, and a slide base 7 provided on the leg portion of the mast 6 is slidably provided on the saddle 4. There is. 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 holding a pile is vertically movable and rotatable on the sliding portion 8 via an arm 9. It is installed.

The clamp 5 has different dimensions a, b and c above the contact surface (top end A) of the pile 1, and these dimensions have a relation of a>b> c. For this reason, when the sliding portion 8 is inclined in the press-fitting traveling direction B of the pile by an angle of θ with respect to the press-fitting direction of the press-fitting pile 11, the pile press-fitting device 3 moves the pile 1 into the pile 1.
Set on.

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, a new pile 11 to be press-fitted is held by the chuck 10 so that the pile 11 and the grip portion 1 of the existing pile 1 are held.
The press-fitting of the pile 11 is started by engaging 1a and 1a and lowering the chuck 10.

By the way, in the pile press-fitting apparatus of this embodiment, as described above, the lower surface of the clamp 5 and the top end A of the existing piles 1, 1 ...
Since the gaps a, b and c are different from each other and a>b> c is set, when the pile press-fitting device 3 is placed on the existing pile, the sliding portion 8 automatically moves in the press-fitting traveling direction B of the pile 1. Is tilted at an angle of θ.

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 inserted.
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. Since the direction of the sliding portion 8 at this time is adjusted to cancel the inclination moment M due to the resistance of the grip portions 1a and 11a, 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 force F1 and a vertical component force F2,
This 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 cancel 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 adjacent upper and lower piles are considered in consideration of the movement of the upper portion of the sliding portion 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. It is possible to decide that the pile press-fitting device should be press-fitted in parallel with, and the operation of setting the pile press-fitting device to 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 diagram showing a state of correction with a wedge sheet pile.

FIG. 5 is an explanatory diagram showing the relationship of the press input when press-fitting the pile according to 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 Top of pile B Pile press-fitting advancing direction θ Slope angle

Claims (1)

[Claims] 1. A mast front end sliding part which is mounted on an existing pile by a clamp provided at the lower part of the main body of the device, is self-propellable in the press-fitting advancing direction of the pile, and is 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 the pile, the size of each of the clamps provided at the lower part of the device main body from the contact surface of the pile is gradually reduced toward the pile press-fitting advancing direction. Then, the pile press-fitting device including means for inclining the sliding portion in the pile press-fitting advancing direction and applying a force input to the pile in a direction opposite to the press-fitting advancing direction.