JPS5929471B2 - Floating body emplacement method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for emplacement of a floating body particularly suitable for bringing a large ship alongside.

When a large ship berths on a floating body such as a floating terminal, there is no problem as long as the displacement of the floating body is sufficiently large compared to the displacement of the large ship, but if it is smaller than the displacement of the large ship, maneuvering during berth will be difficult. extremely difficult.

Furthermore, if the floating body moves due to currents, wind and waves, or changes its direction, it becomes extremely difficult to maneuver the vessel to come alongside.

When mooring a floating body, if the seabed ground is soft and the anchor's holding power is small, it is difficult to absorb the energy of a large ship coming alongside with the mooring cables of the floating body.

As a method of mooring a floating body under such conditions, for example, there is a method of pulling and fixing a floating body 1 in all directions using four mooring ropes 2, as schematically shown in FIG.

This method is effective in reducing material costs and is relatively easy to construct, but if the seabed ground is soft, the mooring effect will not be effective and it will lack stability.

In particular, the biggest drawback is that the mooring lines 2 extend out in all directions, making it impossible for large ships 3 to come alongside.

Therefore, as shown schematically in Fig. 2, a large number of dolphins 4 are installed, and even though the movement of the floating body 1 in three horizontal directions is blocked by these four groups of dolphins 0, mooring ropes are used to prevent movement in the remaining one direction. A method using 2,2 has been developed, but it is extremely uneconomical because it uses a large number of dolphins 4, and the dolphins 4 make it inconvenient to come alongside the purge.

On the other hand, as schematically shown in the vertical cross-sectional view in Fig. 3, the pile 5
There is a method of fixing the floating body using pegs, but it is difficult to drive stakes accurately, and if it is fixed with pegs 5, it cannot be moved unless it is dismantled, making it impossible to move it to a dock etc. during repairs. It ends up.

As a means to solve this problem, a technique for fixing the floating body 1 using dolphins 4, 4, as schematically shown in a plan view in FIG. 4, was developed.

This technique involves providing notches IA and IA at both ends of the floating body 1, and constructing these notches in advance to create a dolphin 4.
, 4, but since the notch and dolphin are engaged through the steps shown in Figures 5 to 7, there are inconveniences such as the work cannot be done until the spring tide. .

That is, as shown in Fig. 5, the dolphin 4.4 is constructed in advance, and the floating body 1 is moved to the dolphin 4 at the time of high tide.
, 4, and as the tide level falls as shown in Figure 6, notches IA and IA are formed in the dolphins 4 and 4.
Determine the structure and dimensions of each part so that it will fit.

Next, ballast water 6 is injected into the floating body 1 to sink the floating body, and the dolphins 4, 4 are fixed in a state where the notches IA, IA are completely engaged with each other.

However, this method is extremely inefficient as it requires waiting for the tide to rise or fall.

This invention is based on the above-mentioned viewpoint, regardless of the tide level,
This provides a method for emplacement of a floating body that can engage a pair of dolphins with notches at both ends in a highly efficient manner at any time, and has notches at both ends in the horizontal direction, allowing ballast water to flow into the interior near the notches. A floating body that floats on the water surface when the floating body that can be freely injected is fixed to a pair of dolphins that have been constructed in advance in the water at intervals corresponding to the two notches by engaging the said notches so as not to be horizontally movable. Engage the notch on one end with one dolphin horizontally and diagonally,
After pouring water into the ballast tank on the side of the notch and tilting the floating body, rotate the floating body around the dolphin on the side where the notch engages, so that the other notch faces above the other dolphin. The floating body is characterized in that by draining the ballast water and returning the floating body horizontally, the notches at both ends are engaged with the dolphins.

Next, the method of the present invention will be explained by way of examples with reference to the drawings.

FIG. 8 is a plan view showing the state of the floating body 1 placed in place according to the present invention.

In this state, the notches IA and IA provided at both ends of the floating body 1
are engaged with a pair of dolphins 4, 4 constructed in advance in the water, and a buffer body 7 is inserted into the gap between the inner surface of the notch and the dolphins 4, 4.

Note that the means for fixing the floating body 1 and the dolphin 4 is arbitrary.

9 to 12 show the method of the present invention in the order of steps.

First, the notch 1A at one end of the floating body 1, which has been towed close to the dolphins 4, 4 constructed in the water according to the spacing between the notches IA, , IA of the floating body 1, is bitten into one dolphin 4 horizontally and diagonally. (Figure 9, 1st step).

Next, ballast water 6 is injected into the ballast tank 1B on the side of the notch 1A that is engaged with the dolphin 4, and the other end is raised (FIG. 10, second step).

From this state, the dolphin 4 with the notch 1A engaged
Rotate the floating body 1 around the center so that the other notch 1A faces above the other dolphin 4 (Fig. 11, 3rd step)
.

Next, the ballast water 6 is gradually drained from the ballast tank 1B, and the notch 1A on the rising side is gradually removed.
This is lowered and engaged with the dolphin 4 located below (FIG. 12, fourth step).

After that, ballast tanks IB at both ends as necessary.

Adjust the height by injecting ballast water into 1B,
The work is completed by fixing the floating body 1 to the dolphins 4, 4.

As is clear from the above explanation, according to the method of the present invention, the work of engaging the floating body notch to the dolphin can be completed with extremely high efficiency and in a short time at any time, regardless of the tide level. The floating body is easy to maneuver when a large ship approaches the berth, and does not move due to tides or wind and waves.
Excellent effects can be obtained, such as allowing large ships to dock safely and reliably.

[Brief explanation of drawings]

Figures 1 and 2 are schematic plan views showing examples of conventional floating body mooring methods, Figure 3 is a schematic longitudinal sectional front view showing another example, and Figure 4 is an example of floating body emplacement using dolphins. A plan view showing,
Figures 5, 6, and 7 (simplified longitudinal sectional front views showing each step of floating body emplacement shown in Figure 4 in order of process; Figure 8 shows an example of a floating body emplaced by the method of the present invention. The plan view, FIG. 9, FIG. 10, FIG. 11, and FIG. 12 are explanatory diagrams showing the method of the present invention in the order of steps. Schematic longitudinal sectional front view of the second step, 1st
FIG. 1 is a schematic plan view of the third step, and FIG. 12 is a schematic front view of the fourth step. In the drawings, 1... floating body, 1A...
Notch, IB...Palast tank, 2...
...Mooring line, 3...Hull, 4...Dolphin, 5...Pile, 6...Ballast water, 1...Buffer body.

Claims (1)

[Claims] 1. A pair of dolphins, in which a floating body with notches at both ends in the horizontal direction, allowing ballast water to be freely injected into the interior near the notches, was constructed in advance in the water at a distance corresponding to the two notches. When the notches are engaged and fixed so as not to be horizontally movable, the notch at one end of the floating body floating on the water surface is engaged with one dolphin from a horizontal diagonal direction, and water is poured into the ballast tank on the side of the notch. After tilting the floating body, turn the floating body around the dolphin on the side with which the notch is engaged, and drain the ballast water with the other notch facing above the other dolphin, and then tilt the floating body. A method for emplacement of a floating body, characterized in that the notches of both bins are brought into engagement with the dolphin by returning it to the horizontal position.