JPH063017B2 - Hanging type pile driving device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a hanging type pile driving device that is suspended on a wire rope such as a pile driving tower or a boom of a crane.

[Prior art]

The foundation structure using piles in construction work is significantly larger than the pier foundation using caisson, etc., and is widely used in civil engineering and construction work.

Among the pile foundations, the hammering method using ready-made piles has diversified in power and capacity due to the development of pile driving machines, and today, diesel hammer, steam hammer (air hammer), vibro hammer, hydraulic hammer are the mainstream. In addition, the pile materials can be roughly classified into RC piles, PC piles, and steel piles nowadays due to the improvement of materials and progress of construction technology.

On the other hand, among civil engineering works, structures such as rivers, coasts, harbors, and offshore structures are often constructed using pile materials, especially steel piles. It is getting more and more.

Generally, pile driving methods performed on the surface of the water include a method of mounting a three-point supported crawler type pile driver on a barge, a method of attaching a leader and a hammer to a hoist ship, and a method of a pile type dedicated pile driver. However, in the method that does not use a hanging hammer, there are many structures in which the leader that sets the hammer and pile material driving angle is hung from the head such as a pile stake and the lower end is fixed. It is usually limited to one-way tilt.

In addition, pile driving ships are often restricted by sea conditions, and there is a drawback in that work time is reduced due to ship sway due to waves and tidal currents, resulting in poor construction efficiency.

As a method of overcoming these various conditions, there is a hanging hammer method using a crawler crane or the like. This is a method in which a pile driving device is mounted on the structure so as not to be affected by the sea condition, and a flying pile hammer is used to cope with an arbitrary pile driving direction and inclination angle.

The above-mentioned flying pile hammer system usually has the following advantages.

That is, there is no need for a long leader for hammers, and since the hammer is a wire-suspended type, diagonal pile driving in any direction is possible, and in order to increase the outreach of pile driving, the crane capacity must be increased. There are many advantages in that it can be dealt with only by increasing the size, and that the hammer can be used for crane loading and unloading work.

However, contrary to the above advantages, it is difficult to control the attitude in the air, and depending on the length of the flying leader, there is a drawback that the lower portion of the flying leader may be hit when the hitting penetration amount is large.

Furthermore, the hanging mechanism in the conventional flying pile hammer device is finally one-point hanging, and the drawbacks resulting from this will be explained concretely with reference to the drawings as follows. is there.

That is, in an example of a conventional flying pile hammer system, an auxiliary leader 5 is attached to a hammer 4 as shown in FIG.
It is attached to the suspension block 3 of the crane via.

That is, the attitude control of the hammer 4 in the air, especially the direction, the inclination angle, and the fixed position retention of the hammer 4, are poor. To further explain these details, the change of the hammer inclination angle is to change the mounting wire 1 for mounting. Change the length or attach to the flying pile hammer device 13,
For example, by changing the pin position of the pin structure,
Work efficiency is poor.

Further, when hanging in the air, vertical swing, horizontal swing motion, etc. easily occur due to wind, inertial force, etc., making it difficult to set the pile head of the hammer 4.

Furthermore, if the suspension inclination angle is constant, the pile has a free length and may bend, so the inclination angle between the pile and the hammer 4 is different, and it is difficult to set the hammer 4 on the pile head, and also the pile head. If the flying pile hammer device 13 is wound up by the suspension block 3 in order to match the shaft centers of the hammer 4 and the pile after the hammer is set, the shaft center of the pile and the hammer 4 may be bent and eccentric hit may occur. is there.

In addition, the one-point suspension of the hammer 4 causes the ram to move vertically during the hammer operation and the downward movement of the hammer 4 to move the center of gravity of the entire flying pile hammer device,
Pitching movement occurs. In this way, the conventional one-point suspension of the flying pile hammer device 13 is
The attitude control in the air is poor, and it is difficult to perform these tasks at high altitudes.

[Object of the Invention]

Therefore, the present invention has been made in order to eliminate the drawbacks of the above-mentioned conventional method, easily perform the attitude control of the hammer of the pile driver at high places, the pile driving work efficiency, and the pile driving accuracy. The purpose is to improve.

[Structure of Invention]

That is, the suspension type pile driving apparatus of the present invention is provided with a cylindrical body or arm rotatable around a vertical axis on the head of a pile driving tower or a boom of a crane, and the center line of the cylindrical body or arm is One or more pairs of two pulleys that can move toward or away from each other are provided, and the corner ends of two suspending wires that are hung through these pulleys and that can be hoisted and unwound, respectively. Is attached near the head and lower part of the flying pile hammer device, and the flying pile hammer device is suspended.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.
The figure is a side view of a hanging type pile device in which a flying pile hammer device is hung, FIG. 2 is a plan view of a main portion showing the upper part of the pile driving device, and FIG. 3 is A-A of FIG. It is a side sectional view of the direction.

First, as shown in FIGS. 2 and 3, a crane table 9 or a head 10 of a pile driving tower is provided with a turntable-shaped cylindrical body 11 or an arm rotatable about a vertical axis. The illustrated flying pile hammer device 1
3 suspension device.

Two or more pairs of pulleys 12 are provided on the upper surface and the lower surface of the cylindrical body 11, and these pulleys 12 move on the center line of the cylindrical body 11 so that they can approach or separate from each other as indicated by an arrow X in FIG. A gear device 30 is provided so that it is possible.

Further, the two suspension wires 14 suspended via the pulleys 12 are respectively attached to the head and lower portions of the flying pile hammer device 13 via suspension blocks 16, Flying by
The inclination angle θ of the pile hammer device 13 is such that the suspension wire 14 is hoisted and lowered by a drum such as a winch to maintain the inclination angle θ of an arbitrary pile driving.

In this way, by suspending the flying pile hammer device 13 at two points in parallel with the suspension wire 14, the flying pile hammer device 13 is hung depending on the state of the hammer position at the start of pile driving and the hammer position when the pile driving progresses. Even if the center of gravity of the entire pile hammer 13 moves, the inclination angle θ of the flying pile hammer device 13 does not change.

Further, the pulley 12 attached to the cylindrical body 11 is
Since the mechanism is such that they approach each other or move away from each other in the direction of the arrow X on the line passing through the center line of 1, even if the inclination angle θ of the flying pile hammer device 13 changes, the two hanging wires 14 are made parallel to each other. Can be kept.

In addition, the cylindrical body 11 installed on the head 10 of the crane boom 9 is driven by a motor 24 with a speed reducer and rotated 180 degrees reciprocally by a gear device 25, whereby the flying pile hammer device 13 is It is possible to rotate in plus and minus 180 °, that is, in all directions, around the vertical axis as indicated by arrow R in the suspended state.

In the hanging-type pile driving device of the present invention having the above-described structure, since the two points of the head and the lower part thereof are hung by the hanging wire 14 via the pulley 12, the flying pile hammer device 13 The attitude control such as the height in the air, the inclination angle θ, and the direction angle can be performed by hoisting each suspension wire 14 and rotating the cylindrical body 11.

That is, at the time of driving a straight pile, as shown in FIGS. 4-A, 4-B and 4-C, the flying pile hammer device 13 is vertically hung, and the backward tilting and the forward tilting pile driving are performed. At the time of installation, as shown in FIGS. 5-A and 5-B, the boom outreach is adjusted by raising and lowering the crane boom 9.

Furthermore, when tilting to the right or mounting a diagonal pile, see Figures 6-A and 6-B.
As shown in FIG. 7A and FIG. 7B, when operating the left tilt / tilt pile, the hanging type pile driving apparatus of the present invention may be operated. In the above operation, the hoisting of the two hanging wires 14 and the turning of the cylindrical body 11 are as illustrated.

〔The invention's effect〕

Therefore, in the hanging type pile driving device of the present invention, the flying pile hammer device is hung at two points through the wires, and each hanging wire is hoisted and hoisted to obtain an arbitrary altitude. It is possible to operate it with the inclination angle suspended in the air, and because it is suspended from two points, the center of gravity of the flying pile hammer device depends on the position of the hammer at the start and end of hammering and the vertical movement of the ram. Even if there is a movement, the tension of the hanging wire is only deformed if it is between the hanging points of the hanging wire, and the pitching motion hardly occurs.

In addition, by attaching the pulley to a rotatable cylinder and allowing it to rotate by plus or minus 180 °, it is possible to cope with oblique pile driving in advance.

That is, since it is hung with a plurality of hanging wires, the directionality is determined to some extent, the lateral wobbling motion due to the influence of wind and inertial force is suppressed more than before, and it is possible to easily align the axis of the pile and the hammer. Therefore, it is effective in preventing eccentric hitting.

Furthermore, since it is suspended from two points, the pile head of the built-in pile bends due to its free length, and even if it is smaller than the required tilt angle, the hammer tilt angle can be easily adjusted and set on the pile head. By hoisting the suspension wire, it is possible to align the axes of the pile and the hammer.

[Brief description of drawings]

FIG. 1 is a side view of a hanging type pile driving device in which a flying pile hammer device is suspended, FIG. 2 is a plan view of an essential part showing the upper part of the pile driving device, and FIG. 3 is a plan view of FIG. A side sectional view in the AA direction, FIG. 4-A, FIG. 4-B, FIG. 4-C, and FIG.
A, FIG. 5-B, FIG. 6-A, FIG. 6-B, FIG. 7-A
7 and FIG. 7-B are explanatory views showing a state in which the flying pile hammer device is suspended in different postures by the suspension type pile driving device of FIG. 1, and FIG. 8 is a conventional suspension system. It is a side view of a flying pile hammer device. 4 ... Hammer, 5 ... Auxiliary leader, 9 ... Crane boom, 10 ... Head, 11 ... Cylindrical body, 12 ... Pulley, 13 ... Flying pile hammer device, 14 ... Suspension wire, 16 ... Suspension block, 24 … Motor with reducer, 2
5 ... Gear device (for rotating cylindrical body), 30 ... Gear device (for moving pulley).

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Mitsuo Sunaga 663-116 Ozenji, Aso-ku, Kawasaki-shi, Kanagawa Prefecture (72) Inventor Shuichiro Minami 2-29-1, Daido, Kanazawa-ku, Yokohama-shi, Kanagawa (72) Inventor Ogi Ryo 2-1-2-618, Ichikawa-shi, Chiba (72) Inventor Yuji Douji 3-9-209 Denenchofu, Ota-ku, Tokyo (56) Bibliographic references Sho 61-116835 (JP, U) Showa 46-41054 (JP, B1) Showa 47-41125 (JP, Y1)

Claims (1)

[Claims] 1. A cylinder or arm rotatable around a vertical axis is provided on the head of a pile stake or a boom of a crane, and the cylinder or arm is arranged so as to approach or separate from each other on the center line of the cylinder or arm. Two or more pairs of movable pulleys are provided, and further, two ends of each of the two suspending wires that can be hoisted and hoisted via these pulleys are connected to a flying pile hammer. Attach it to the head and bottom of the device to
A suspended pile driving device characterized by suspending a hammer device.