JPH0874252A - Underwater steel pipe pile driving process and device thereof - Google Patents

Abstract

PURPOSE: To enable pile-driving to be carried out even in a super-large water depth because steel pipe piles having sufficent length for driving are lowered underseas while they are held by guide frames, while the steal pipe piles are economical because of no need for extra steel pipe piles, and the pile driving can be executed quickly and in few processes even in an ocean on the surface of which the marine meteorological conditions are severe. CONSTITUTION: An underwater steel pipe pile driving device consisting of a deck 9 equipped with a winch 8 and hung above the water surface, an upper guide frame 10, and a lower guide frame 11 individually hung from the deck 9 by the winch 8, and underwater hammers 13, each of which is mounted removably to the upper end of a driven steel pipe pile 4 arranged so as to penetrate through the upper guide frame 10, and the lower guide frame 11 and hung from the deck 9 by the winch 8 so that it can freely rise and fall, is used. After the lower guide frame 11 and the lower end of the steel pipe pile 4 reach the bottom of the water, the upper guide frame 10 is suitably lowered to drive the underwater hammers 13 to drive the steel pipe piles 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for driving an underwater foundation steel pipe pile required for constructing an underwater structure.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 10 to 13, a pile driving ship 1 in which a pile driving hammer 3 is provided on a leader mast 2 so as to be vertically movable.
The steel pipe pile 4 is driven from the sea. Although not shown, the steel pipe pile 4 is carried by a pile carrier and hoisted by a carrier with a crane as shown in Fig. 11, and sequentially welded to form a long pile.

In this way, long piles including an extra length up to the sea are laid, and thereafter, as shown in FIG. 12, they are cut by an underwater cutting machine 5 and the extra length is collected.

In addition, a template (ruler) 6 is also installed in advance on the seabed in order to improve the accuracy of driving.

[0005]

In the construction method of the underwater foundation steel pipe pile, the material of the steel pipe pile 4 is required to have an extra length, for example, in the water depth. Furthermore, piles with a length greater than 50 m to 100 m are required at super-deep water, which makes construction practically difficult.

Further, there are many construction procedures, and it takes too much time for construction in the open sea where severe weather phenomena occur.

In addition to this, in order to install the template 6 on the seabed, extra provisional piles 7 have to be placed, and it takes the same labor as placing the original steel pipe piles 4.

The object of the present invention is to eliminate the disadvantages of the prior art, to enable construction even in an extremely large depth of water, and to construct a pile of a required length promptly in a small number of steps without looking at excess. To provide a steel pipe pile driving method and device.

[0009]

In order to achieve the above-mentioned object, the present invention provides a submersible steel pipe pile driving method in which a deck on which a hoisting device is installed is suspended from the surface of the water, and an upper guide frame and a lower part are suspended from the deck. The guide frames are individually hung up and down by a hoisting device, and a cast steel pipe pile is placed so as to penetrate through the upper guide frame and the lower guide frame, and a submersible hammer is detachably attached to the upper end of this steel pipe pile. The part of this underwater hammer is hung up and down freely from the deck by a hoisting device, these upper guide frame, lower guide frame, steel pipe pile with a submersible hammer are simultaneously lowered into the water, the lower guide frame, the lower end of the steel pipe pile is at the bottom of the water. After landing, lower the upper guide frame appropriately and drive the underwater hammer to drive the steel pipe pile, and lower guide frame. Over arm is to summarized in that a underwater structures.

As the underwater steel pipe pile driving device, a deck for suspending and supporting the hoisting device on the surface of the water, an upper guide frame and a lower guide frame for individually lifting and lowering from the deck by the hoisting device, and , A submersible hammer that is detachably attached to the upper end of a cast steel pipe pile that is arranged so as to pass through the upper guide frame and the lower guide frame, and that is vertically hung from the deck by a hoisting device. is there.

[0011]

According to the present invention as set forth in claims 1 and 3, a cast steel pipe pile in which an upper guide frame, a lower guide frame, and a submersible hammer are detachably attached from a deck suspended above the water surface. Since each of them is individually hung up and down by a hoisting device, the steel pipe pile can be accurately laid on the bottom of the water by a submersible hammer for the required length while being guided by these guide frames.

According to the present invention as set forth in claim 2, since the lower guide frame constitutes the underwater structure to be constructed, the construction can be rationalized not by temporary construction but by permanent construction.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 6 are front views of respective steps showing one embodiment of the underwater steel pipe pile driving method of the present invention.

First, the underwater steel pipe pile driving device of the present invention used in this method will be described. As shown in FIG. 7, a deck 9 having a plurality of winches 8 as hoisting devices is installed.
Is suspended above the surface of the water. In the figure, 9a is a hanging point.

An upper guide frame 10 as shown in FIG. 8 having a through hole 12 for a steel pipe pile 4 to be described later, and FIG.
The lower guide frame 11 as shown in FIG.
Suspend freely from deck 9 via. The lower guide frame 11 is of a buoy base type capable of injecting water, and may also serve as a part of an underwater structure to be constructed.

A hydraulic submersible hammer 13 is removably attached to the upper end of the steel pipe pile 4 arranged so as to pass through the upper guide frame 10 and the lower guide frame 11, and the submersible hammer 13 can also be raised and lowered by the winch 8. Hang.

Next, an underwater steel pipe pile driving method of the present invention using such an underwater steel pipe pile driving apparatus will be described. As shown in FIG. 1, a deck 9 provided with a winch 8 is suspended on a water surface by a hoist ship. Power and measurement lines are connected to the ship.

At this time, the upper guide frame 10 and the lower guide frame 11 are individually suspended from the deck 9 by the winch 8 so that the upper guide frame 10 and the lower guide frame 11 can be lifted up and down. A pile 4 is arranged, a submersible hammer 13 is detachably attached to the upper end of the steel pipe pile 4, and the portion of the submersible hammer 13 is suspended from the deck 9 so as to be vertically movable.

As shown in FIG. 2, a predetermined position is aligned by turning up and down, and it is wound down. The deck 9 stops unwinding at a position 5 m above sea level, and this deck 9 fixes its position above sea level. Then, the upper guide frame 10, the lower guide frame 11, the steel pipe pile 4, etc. are wound down by the winch 8 and simultaneously lowered into the sea.

As shown in FIG. 3, the lower end of the steel pipe pile 4 and the lower guide frame 11 are attached to the bottom of the water, and the lower guide frame 11 is held horizontally by the load control of the winch 8. The steel pipe pile 4 is stabilized by self-sinking.

Preparation for driving the steel pipe pile 4 is started, and the upper guide frame 10 is wound down to an appropriate position as shown in FIG.

As shown in FIG. 5, the submersible hammer 13 is activated to drive the steel pipe pile 4, and at the same time, the upper guide frame 10 is sequentially lowered.

After the driving is completed, as shown in FIG. 6, the chuck 13a of the submersible hammer 13 is opened, and the winding and collecting are performed. Further, the upper guide frame 10 is wound up, pulled out, and collected. The lifting tool of the lower guide frame 11 is separated and the lifting tool is collected.

[0024]

As described above, in the method and apparatus for driving a submerged steel pipe pile according to the present invention, a steel pipe pile having a length sufficient for driving is held by the guide frame and lowered into water.
It can be constructed even in super-deep water, and it is economical because it does not need to see extra steel pipe piles, and it can be constructed quickly with a small number of steps even in the open sea where the weather and sea conditions are severe. Is.

[Brief description of drawings]

FIG. 1 is a front view of a first step showing one embodiment of a method for driving a submerged steel pipe pile according to the present invention.

FIG. 2 is a front view of a second step showing one embodiment of the underwater steel pipe pile driving method of the present invention.

FIG. 3 is a front view of a third step showing an embodiment of the underwater steel pipe pile driving method of the present invention.

FIG. 4 is a front view of a fourth step showing an embodiment of the underwater steel pipe pile driving method of the present invention.

FIG. 5 is a front view of a fifth step showing an embodiment of the underwater steel pipe pile driving method of the present invention.

FIG. 6 is a front view of a fifth step showing one embodiment of the method for driving a submerged steel pipe pile according to the present invention.

FIG. 7 is a plan view of a deck portion.

FIG. 8 is a plan view of an upper guide frame.

FIG. 9 is a plan view of a lower guide frame.

FIG. 10 is a side view of a conventional example when driving a pile.

FIG. 11 is a side view of a conventional example when adding piles.

FIG. 12 is a side view of a conventional example when cutting a pile.

FIG. 13 is a side view of another conventional example when driving piles.

[Explanation of symbols]

1 ... Pile driving ship 2 ... Leader mast 3 ... Pile driving hammer 4 ... Steel pipe pile 5 ... Underwater cutting machine 6 ... Template 7 ... Temporary pile 8 ... Winch 9 ... Deck 9a ... Suspension point 10 ... Upper guide frame 11 ... Lower guide frame 12 ... Through hole 13 ... Submersible hammer 13a ... Chuck

Claims (3)

[Claims] 1. A deck on which a hoisting device is installed is suspended from the surface of the water, and an upper guide frame and a lower guide frame are individually hung from the deck by a hoisting device, and an upper guide frame and a lower guide frame are suspended. A steel pipe pile is arranged so as to penetrate through, a submersible hammer is removably attached to the upper end of this steel pipe pile, and the portion of this submersible hammer is suspended from the deck by a hoisting device, these upper guide frames, Lower the lower guide frame and steel pipe pile with a submersible hammer at the same time into the water, and after the lower guide frame and the lower end of the steel pipe pile reach the bottom of the water,
An underwater steel pipe pile driving method characterized by lowering the upper guide frame appropriately and driving a submersible hammer to drive a steel pipe pile. 2. The underwater steel pipe pile driving method according to claim 1, wherein the lower guide frame is an underwater structure. 3. A deck for suspending and supporting the hoisting device on the surface of the water, an upper guide frame and a lower guide frame which are individually hung up and down from the deck by the hoisting device, and an upper guide frame and a lower guide frame. An underwater steel pipe pile placing device comprising a submersible hammer detachably attached to an upper end of a cast steel pipe pile arranged so as to penetrate therethrough and hung up and down by a hoisting device from the deck.