JPS58204220A - Method and apparatus for driving pile to bottom under water - Google Patents

Abstract

PURPOSE:To permit a pile to drive with a small driving force by a method in which a water-tight hollow hammer casing is set at the upper end of a pile erected on the bottom under water, and a drop hammer in the casing is struck to drive the pile in such a way as to eliminate the resistance of water. CONSTITUTION:A pile 2 is hung down into a guide casing 6, a hanging rope 13 and a rope 17 are connected to guide a hammer casing 3 into the guide casing 6, a cap 20 is fitted on the head of the pile 2, and a drop hammer 4 is hung down. Then, the drop hammer 4 is dropped to strike the head of the pile 2 through the bottom 19 of the hammer casing 3. As the pile 3 is driven by striking, gravel 27 is supplied through a gravel supply pipe into the unfilled portion above the collar 14 of the pile 2, the bottom cover 25 of a gravel hopper 24 is closed, and compressed air is blown from an air blowing pipe 26 into the gravel supply pipe to strongly pack the gravel 27.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for driving piles into the water bottom, such as rivers, lakes, and seabeds, for driving piles into the bottom of water to improve the ground at the bottom of the water.

Conventionally, to improve the ground, piles are driven into the soil using a hammer. By the way, it is possible to use the method described above to strengthen the ground at the bottom of the water, but if a drop hammer is dropped into water, it will encounter resistance from the water and will not be able to obtain any driving force. be. Moreover, it is impossible to carry out in deep seabed.

The present invention was made in view of such problems,
The purpose is to develop a method and device for driving piles to the underwater bottom, which can eliminate water resistance and allow pile driving even on the deep seabed in almost the same way as on land, using a rational method and structure. It is on offer.

In other words, the specified invention is a pile (2) erected on the water bottom (fl).
A watertight hollow hammer cage (3) is placed on the upper end, and a hammer (4) that can be lifted and dropped is dropped inside this hammer cage (7') (31) to drive the pile. The invention relates to a method for driving piles into the water bottom, and in the combined invention, the specified invention is advanced to a barge (5) floating on the water surface and a barge (5). a cylindrical guide casing (6) held;
Inside the guide casing (6), there is a hollow hammer cage (3) that is mounted and supported on the upper end of a stake (2) set up on the bottom of the water, and inside the hammer cage (3), it can be lifted and dropped freely. This invention relates to an apparatus for driving piles to the underwater bottom, characterized by comprising a drop hammer (4) and a driving means for lifting and dropping the drop hammer (4).

Embodiments of the present invention will be described in detail below with reference to the drawings.

In Fig. 1, (5) is a barge, which is floated on the sea surface (7) and fixed with an anchor or the like. A movable cart (8) is provided on the barge (6) so that it can run along the rails (9). A plurality of arms (lO) are attached to the movable trolley (8), and these arms (lO) are used to hold a kite cage one (6). Kaido Keishinji (
6) is cylindrical and extends from above the sea surface (7) to the seabed (bottom) (
1) has been reached. The kite cage-J (6) may be one piece, or may be joined in the length direction.

Additionally, a crane 0'4 is mounted on the barge (5).
A hanging cable θ which can be rolled up and lowered is suspended from the tip of the pool (11) which can be raised and lowered. (2) is a pile, which is a concrete pile. A plurality of collars (14) are provided on the outer periphery of the pile (2) at vertical intervals.

In the embodiment, the collar (14) is provided, but it may not be provided. Pile (2
) is suspended from the hanging cable θ of the crane 02), guided to the guide casing center (6), and guided to the guide casing terminal (6).
It is erected on the bottom of the water (sea floor) (1) within the water. (3) is a hammer cage, in which the upper and lower bases of a cylindrical body are closed to form a watertight hollow space. A hammer (4), which is considerably longer or shorter than the hammer cage (3), is provided inside the hammer cage (3).
) is inserted into the cable Oη, and the upper end of the drop hammer (4) is attached to it. Watertight sealing material (
16) is attached, and a watertight sealing material (16) is used to ensure a reliable watertight seal even when the cable θη is put in and out of the hammer cage seat (3). And the cable (+7) sliding against the watertight sealing material (16)
The parts are made of metal rods (11) to facilitate watertight sealing.

An engaging part (not shown) is formed at the upper end of the cable 0'6, so that it can be attached to the hanging cable 01 of the crane (12). Also, the bottom (I) of the hammer cage (3)
C4 has high strength so that it can sufficiently withstand the falling blow of the drop hammer (4). A + cep (3) is formed at the bottom O→ so as to be able to hold the head of the stake (2).

(21) is a gravel filling device; gravel filling device (211) is a gravel filling device;
is structured as follows. That is, two gravel supply pipes are provided on the outside of the guide casing (6) as shown in Figure wJ5. The gravel supply pipe hangs down to the lower end of the guide cage (6), and the lower end forms a supply port that opens downward and inward of the guide cage (6).

The gravel hopper above the sea surface (7) is equipped with a bottom cover that can be opened and closed. (B) is an air blowing pipe, and when the bottom cover is closed, air is The gravel supply pipe □□
By force-feeding the gravel into the filling area, the gravel can be more strongly filled into the filling section.

According to this configuration, as shown in FIG. The rope (1/l) led out from the marker sink (3) is tied to the hanging rope (13), and the guide casing +dl is guided into the guide casing (6). (6
) into the head of the stake (2), and then insert the drop hammer (4) into the hammer casing (3).
) to the upper end, then hang the hanging cable (13
) to drop the drop hammer (4), and hit the head of the stake (2) with the drop hammer (4) through the bottom s (+9) of the hashimer cage (3) to drive the pile. I will do it. In such a case, drop hashimer (4
) is dropped in a watertight hollow hammer cage (3), so there is no water resistance, and piling can be carried out in the deep sea almost in the same way as on land. Then, as the pile (2) is driven in by impact, the unfilled part above the collar 04 of the pile (2) is supplied with gravel from the gravel supply pipe, and then the gravel hopper
By closing the bottom cover and blowing pressurized air into the gravel supply pipe from the air blowing pipe, the gravel (2η) is strongly filled.

FIG. 7 shows another embodiment of the present invention, in which a hydraulic syringe (c) is provided in a watertight hollow hammer cage (3), and a drop hammer ( 4), insert the hydraulic piping (2)) for supplying pressure oil to the hydraulic cylinder and discharging oil watertightly into the top plate part (15) of the Hashimer cage system (3), and connect these hydraulic piping. t30) (30) is connected to a hydraulic unit (not shown) on the barge (5), and the hydraulic syringe (c) is expanded and contracted by the operation of the hydraulic unit, and the drop hammer (
4) can be raised and dropped within the hammer cage 'J/)I3). In such a case, there is nothing that goes in or out of the hammer casing (3), and it is only necessary to provide a watertight seal around the top plate (hydraulic piping inserted through the country), which may simplify the seal structure.

In addition, to drive the drop hammer (4) downward, clay, 7 (12) was used in the embodiment, and a hydraulic syringe (c) was used in other embodiments. ) can be modified in various designs in addition to the above.

In the examples, the method and apparatus of the present invention were applied to the pile (2) with the tsuba (I4), but the method and apparatus of the present invention were applied to the pile (2) with the tsuba (I4).
This method can also be applied to piles (2) that do not have +4).

In summary, in the specific invention, a watertight hollow hammer casing is mounted on the upper end of a pile erected on the bottom of the water, and a drop hammer that can be lifted and dropped freely is struck by a drop within the hammer cage. In other words, since the drop hammer is dropped inside the watertight hollow hammer casing mounted on the top of the pile, there is no water resistance on the drop hammer, and the pile is driven underwater. It has the advantage that driving can be performed with a light and small driving force, almost the same as driving piles on the ground. The combined invention of the present invention includes a barge floating on the water surface, a cylindrical guide casing held by the barge, and a cylindrical guide casing mounted on the upper end of a pile erected at the bottom of the water in the guide casing. Since the hammer casing is composed of a watertight hollow hammer casing that is installed and supported, a drop hammer that can be lifted and dropped within the hammer casing, and a driving means that lifts and drops the drop hammer, it can achieve the same effect as the specified invention. However, in addition to this, since the piles and hammer casings are guided by the guide casings held on the barge, the piles may unexpectedly fall over underwater or the hammer casings may come off the piles. This method has the advantage that underwater piling work can be carried out easily and reliably.

[Brief explanation of drawings]

Fig. 1 is an overall schematic side view of one embodiment of the present invention, Fig. 92 and Fig. 3 are partially cutaway side views showing the same effect as above, @4
The figure is a partially broken side view showing the relationship between the hammer case, pile and drop hammer, Figure 5 is a sectional view taken along the line X-X of Figure 4, and Figure 6 is a side view showing the action of filling with pebbles. Figures 7(a) and 7(b) are side sectional views showing the operation of another embodiment of the same, in which +11 is the bottom of the water, (2) is the pile, (
3) is a hammer casing, (4) is a drop casing, (5) is a barge, and (6) is a guide casing. Agent Patent Attorney Ishi 1) Chief 7 Figure 3 Figure 4 Figure 7 (0) (b)

Claims (1)

[Claims] +1) A watertight hollow hashimer casing is placed on the upper end of a pile erected on the bottom of the water, and a drop hammer that can be lifted and dropped freely is placed inside the hashimer casing to drive the pile. A method for driving piles to the underwater bottom. (2) A barge floating on the water surface, a cylindrical guide casing held by the barge, and a kite cage: a watertight hollow hashimer casing mounted and supported on the upper end of a pile erected on the bottom of the water in a J-rig. A piling device to the underwater bottom, comprising: a drop hammer that can be lifted and dropped freely within a hash mer casing; and a drive means that lifts and drops the one-drop hammer. (3) Claim 2, characterized in that the drop hammer is suspended and held by a cable so that it can fall freely, and a watertight sealing material is interposed between the cable and the top plate portion of the hashimer casing. Piling device to the underwater bottom as described in Section 1. (4) The piling device for underwater bottom according to claim 3, characterized in that the cable portion that slides into contact with the watertight sealing material of the top plate portion is formed as a rod-shaped body.・(6) A hydraulic cylinder is installed in a watertight hollow hashimer casing. 1 A drop hammer is attached to the cylinder O-end, and a hydraulic pipe that supplies hydraulic oil for expanding and contracting the hydraulic cylinder is inserted into the hashimer casing in a watertight manner. 3. The apparatus for driving piles to the underwater bottom according to claim 2, characterized in that: (6) Flanges are provided at local intervals of the piles at regular intervals, and a gravel filling device is installed to fill the unfilled portions formed above the flanges of the nine piles with gravel, which are driven into the water bottom. An apparatus for driving piles to the underwater bottom according to claim 2.