JPS5858273B2 - How to land large structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides a method for building large structures, such as blocks constituting a plant, and transporting them by sea to install them at a desired location. This invention relates to a method for bringing a large structure ashore when it is floated and towed to a destination.

The plant construction method involves dividing the plant into multiple blocks, assembling each block on a surface plate, then transporting these blocks to the construction site and installing them on the pre-levelled site.
Methods are being considered to omit foundation work and assembly on site.

In order to realize this method, the assembled plant
The method of unloading, transporting and loading the blocks must be worked out in advance.

The weight of such a plant block is 500 (t) ~
It is estimated to be around 1600(1).

However, the lifting capacity of large cranes already installed at docks and the like is usually 700 m (maximum), so the weight of the plant block often exceeds the lifting capacity of the crane.

This invention was made in view of the above circumstances, and
The purpose of this invention is to provide a method that can safely and reliably bring a large structure onto land when the weight exceeds the lifting capacity of a crane and is transported by sea.

In order to achieve this object, the method for landing a large structure according to the present invention can introduce towing tanks placed on both sides of the bottom of the large structure that has been transported by sea to the destination coast. Two recesses are provided, and a trailer station connected to the land is provided between the two recesses. After introducing the towing tanks on both sides into the recesses, the trailer station is equipped with a trailer station. The feature is that a trailer for transporting goods is inserted and a large structure is mounted on the trailer.

A detailed description will be given below with reference to the drawings.

In Figures 1 to 3, towing tanks 2 are placed on the bottom of the dock 1, and a surface plate 3, which will serve as the foundation for on-site installation, is placed on top of these tanks 2 by a crane (as shown). do.

At this time, the tank 2 is positioned near both sides of the surface plate 3.

Then, the large structure P is assembled on the surface plate 3, and if necessary, pipes and equipment are also installed at this time.

Although the surface plate 3 shown in the figure is not plate-like but only a frame, the surface plate includes everything that will serve as the basis for installation on site.

For example, the towing tank 2 and the surface plate 3 are fixed to each other.
It is preferable to fix the mounting member 4 to the upper surface and fix the mounting member 4 to the surface plate 3 using bolts and nuts 5.

Inside the tank 2, a solid material ballast (for example, concrete) 6 for adjusting the center of gravity is provided, as well as a ballast submergence/drainage lower, an intermediate pipe 18, and an air vent hole 9.

Further, various equipment such as a ballast submersion/drainage pump 10, a ballast control valve 11, and a ballast piping 12 are installed in the vicinity of the dock 1.

When the assembly of the structure P is completed in this manner, the tank 2 is emptied and water is poured into the dock 1, and the structure P is floated by the tank 2.

As shown in Figure 4, after interconnecting multiple floating structures P and completing ballast adjustment, the tug boat 1
3 to tow it towards its destination.

As shown in Figures 5 to 7, on the coast S of the destination where the structure P is to be brought ashore, a depression is made toward the land where the towing tank 2 can be introduced in accordance with the spacing between the towing tanks 2 on both sides. A recess 21 is made in advance.

In other words, these recesses 21 are open towards the sea.

A trailer station 22 connected to the land is provided between the two recesses 21.

After towing the structure P on the tank 2 close to the recess 21, the structure P is towed by the winch 23 on land,
The towing tanks 2 on both sides are introduced into both recesses 21.

Then, a trailer 24 for transporting heavy goods is placed in the gap below the surface plate 3 located above the trailer station 22,
In this state, ballast water is injected into the tank 2 and the structure P is lowered slightly.

Then, the surface plate 3 on which the structure P is assembled is placed on the trailer 24, so if the tank 2 is separated from the surface plate 3,
The structure P on the surface plate 3 is completely mounted on the trailer 24.

Thereafter, the structure P is transported overland to the construction site by the trailer 24.

Note that instead of injecting ballast water into the tank 2, it is also possible to use a trailer with a jack to jack it up and transfer the structure P to the trailer.

1. Figures 8 through 13 show other examples of the process from the construction of a large building to its attachment to a towing tank.

Here, a large structure P is being constructed on board 31.

That is, first, place the board 31 at the required position on the bottom of the dock 1.
is arranged, and the surface plate 3 is placed on this board 31.

Then, the large structure P is assembled on this surface plate 3 (FIG. 8), and after completion, the auxiliary tank 32 is carried under the surface plate 3 (FIG. 9).

The auxiliary tank 32 is preferably carried in by sliding on rollers 33 disposed on the bottom surface of the dock 1.

Further, this auxiliary tank 32 is made to have a size that has enough buoyancy to compensate for the insufficient lifting capacity of the crane relative to the weight of the structure P.

Next, attach the auxiliary tank 32 to the bottom surface of the surface plate 3 (first
Figure 0).

After that, seawater is injected into the dock, and the structure P is lifted up along with the surface plate using the cable 33 (FIG. 11).

Since the buoyancy of the tank 32 acts on the structure P, it is possible to lift the structure P even if the gravity of the structure P exceeds the lifting capacity of the crane.

While the structure P is being lifted, move it to a place where the pedestal 34 and the towing tank 2 are prepared, and then move the structure P to the pedestal 34.
Place it on top (Fig. 12).

Then, the seawater in the dock is discharged and the auxiliary tank 32 is removed, and the towing tank 2 is attached to the lower surface of the surface plate 3.

Finally, when water is poured into the dock again, the towing tank 2 has sufficient buoyancy to float the structure P.
The structure P is levitated by this tank 2 (FIG. 13).

In this state, the tank 2 is towed to the planned construction site and the structure P is transported.

As described above, according to the method of the present invention, when a large structure is floated on the sea by the buoyancy of a towing tank and towed to a destination, two depressions are simply placed on the coast without using any cranes or other equipment. By simply creating trailer stations in both recesses, the structure can be extremely easily and reliably landed on a transport trailer.

[Brief explanation of the drawing]

Figures 1 to 7 show an example of implementing this invention,
Figure 1 is a plan view of the entire dock, Figure 2 is a front view of the large structure, Figure 3 is the same plan view, Figure 4 is a side view showing the towed state, and Figure 5 is a plan view showing the landing state. FIG. 6 is a side view of the same, and FIG. 7 is a front view of the same. FIGS. 8 to 13 are front views sequentially showing the work procedure from constructing a large building in a dock to attaching it to a towing tank. 2...Tow tank, 21...Recess,
22... Trailer station, 24...
...Trailer for transporting heavy goods, P...Large structure, S...Coast.

Claims (1)

[Claims] 1. Two recesses 21 that can accommodate the towing tank 2 placed on both sides below the large structure P that has been transported by sea to the coast S for landing purposes and are recessed toward the land, and a double recess. After installing one trailer station 22 that continues to the land between the two recesses and introducing the towing tanks 2 on both sides into the two recesses, a trailer 24 for transporting heavy goods is placed in the trailer station 22 and a large structure is transported. A method for landing a large structure, characterized by loading P on the trailer 24.