JPH0629515B2 - Pile press-fitting device - Google Patents

Description

Description: TECHNICAL FIELD 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. Is.

(Prior art) Steel piles, such as steel sheet piles, are continuously press-fitted in construction work cliffs, sewer cliffs, or seawall construction. I will press in a new pile.

In the conventional pile press-fitting device, as shown in FIG. 2, while holding the existing pile 50 with the clamp 53 configured in the lower part of the device, the main body of the device is advanced in the press-fitting advancing direction of the pile, and the chuck 51 is moved along the sliding portion 52. And slides up and down to press fit the pile 50a.

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

(Problems to be Solved by the Invention) As shown in FIG. 3, the conventional pile press-fitting device has a press-fitting pile 50.
When a pressure F is applied to a in the vertical direction and press-fitted, the tip penetration resistance force and the peripheral surface friction resistance force R0 act as a reaction force against the press-in force F, and further the grip portion 57 between the existing pile 50 and the press-fit pile 50a. Since the grip resistance R of is generated, the press-fitting pile 50
A tilting moment M is generated in a, and the press-fitting pile 50a tilts in the press-fitting traveling direction B, causing a so-called forward tilt phenomenon.

Since this forward fall becomes larger as the piles are pressed in, and finally cannot be press-fitted, in the past, as shown in FIG. 4, a wedge sheet pile 58 (punch sheet pile) was installed to correct. 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 order to prevent the pile from falling forward and to allow for the cumulative tolerance of each sliding part of the pile press-fitting device, always set the pile press-fitting device on the existing pile by inclining it by the angle θ in the press-fitting advance direction. Need to 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. .

(Means for Solving Problems) The present invention has been made to solve the above problems,
It is placed on the existing pile with the clamp provided at the bottom of the device body,
In the pile press-fitting device, which is capable of self-propelling in the press-fitting traveling direction of the pile, and which clamps and press-fits the pile with a chuck that moves up and down along the sliding part of the front end of the mast configured via a slide base on the saddle, the slide Means for gradually reducing the thickness of the slide base for moving the moving part in the pile press-fitting advancing direction, inclining the sliding part in the pile press-fitting advancing direction, and applying a press force in the direction opposite to the press-fit advancing direction to the pile. It is characterized by having.

(Operation) Hold the press-fitting pile with the pile chuck configured on the front part of the device main body,
Press into the grip of the front pile of the existing pile by engaging it. In this case, the thickness of the slide base that moves the sliding part is
Since the sliding part at the front end of the mast is inclined toward the press-fitting advancing direction of the pile by gradually decreasing it toward the pile advancing direction, press-fitting is applied to the pile in the direction opposite to the press-fitting advancing direction. Since the force that cancels the tilting moment due to the resistance generated between the existing pile and the grip portion is generated, the pile can be press-fitted without tilting in the press-fitting advancing direction.

(Example) Next, the Example of this invention is described in detail based on an accompanying drawing.

FIG. 1 is a front view of the first 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 tops A, A ... Are horizontally at a predetermined height from the ground surface. It is press-fitted.

A pile press-fitting device 3 is placed on the piles 1, 1 ,. Three clamps 5 are provided at the lower part of the saddle 4 of the pile press-fitting device 3, and these clamps 5 can slide in the left-right direction with respect to the traveling direction, and the positions can be adjusted according to the size of the pile 1. It can be adjusted.

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.

A sliding part 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 via an arm 9 on the sliding part 8. It is installed.

The thickness of the slide base 7 is gradually reduced in the pile press-fitting traveling direction. 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.

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 held by the chuck 10, the grip 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 the present embodiment, since the slide base 7 is gradually reduced in thickness in the pile press-fitting traveling direction B as described above, when the pile press-fitting apparatus 3 is placed on the existing pile, the sliding portion is moved. 8 is automatically inclined by 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 started to be installed and pressed in parallel to the existing pile 1, the clamp 5 and the saddle 4, the saddle 4 and the slide base 7, the sliding portion 8 and the arm 9, the arm 9 and the chuck 10 are provided.
Due to the accumulated tolerance of each sliding part, the upper part of the sliding part 8 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. 5. The press-fitting direction V with the picked-up portion 10a of the chuck 10 on the pile 11 as a fulcrum.
A force input F is applied to the pile 11 along the direction. This pressure input F is
Although it is decomposed into a horizontal component force F1 and a vertical component force F2, this horizontal component force F1 cancels the tilting moment M, so that the pile 1
1 is press-fitted vertically as described above.

(Effect of the invention) As described above, the pile press-fitting device according to the present invention includes means for inclining the sliding portion so as to apply a pressure input in the direction opposite to the press-fitting advancing direction to the pile. A horizontal component force that cancels the tilting momente due to the grip resistance generated in the grip portion of the pile is generated, and the pile can be press-fitted without tilting in the press-fitting advancing direction, and the forward tilt is eliminated.

In addition, when the pile press-fitting device is placed on the pile, it should be parallel to the adjacent pile considering the movement of the upper part of the sliding part due to the tolerance of each sliding part of the machine and the tilt moment due to the resistance of the clip part of the pile. Since it is possible to determine that the pile is to be press-fitted, the operation of setting the pile press-fitting device on the pile at the time of press-fitting is easy, and no special operation technique of the operator is required for this operation. The press-fitting work is accurate,
Moreover, there is an effect that the efficiency 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 a pile is tilted forward, and FIG. 4 is a wedge sheet pile. Fig. 5 is an explanatory view showing a state of correction by Fig. 5, and Fig. 5 is an explanatory view showing a relation of press-fitting at the time of press-fitting a pile in the embodiment of the present invention. 1, 11 ... Pile, 1a, 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-fit direction, θ: tilt angle

Claims (1)

[Claims] 1. A sliding portion at a front end of a mast, which is mounted on an existing pile by a clamp provided at a lower portion of a main body of the apparatus, is self-propellable in a press-fitting traveling direction of the pile, and is configured 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 a direction, a thickness of a slide base for moving the sliding part is gradually reduced in a pile press-fitting advancing direction, and the sliding part is piled. A pile press-fitting device equipped with means for inclining in the press-fitting advancing direction and applying a force input to the pile in a direction opposite to the press-fitting advancing direction.