JPS5847392B2 - Construction and transport method of large structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to large structure construction projects in which large structures, such as blocks guarding a plant, are constructed and then transported and installed at a desired site using purge. Concerning how to take it out and load it on the purge.

The plant construction method involves dividing the plant into multiple blocks, assembling each block on a surface plate, then transporting it to the construction site and installing it as is 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
)~1600(1).

Assuming that the plant blocks are assembled inside the dock, the maximum lifting capacity of the large crane installed at the dock is approximately 700 (t), so the weight of the plant block often exceeds the crane's lifting capacity. .

This invention was made in view of the above circumstances, and
The purpose of this invention is to provide a method by which a large structure built inside a dock whose weight exceeds the lifting capacity of a crane can be carried out of the dock and safely and reliably loaded onto a purge.

In order to achieve this object, the method for constructing and transporting a large structure according to the present invention includes arranging a surface plate on the bottom of a dog with floats interposed at least near both sides, assembling the large structure on the surface plate, While water is injected into the dock and the structure is floated along with the surface plate using a float, submersible
The Purge is submerged in a predetermined sea area, a float is towed from the dock to a position directly above the Purge, and a large structure is mounted on the Purge by floating the Purge.

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

In Figures 1 to 12, floats 2 consisting of tanks, etc. are placed at required positions on the bottom of dock 1, and surface plate 3, which will serve as the basis for on-site installation, is placed on top of these floats 2 using a crane (not shown). (omitted).

At this time, the floats 2 are positioned near both sides of the surface plate 3.

The surface plate 3 includes not only plate-shaped items but also all items that serve as the basis for installation on site, such as only a frame.

The float 2 also serves as a board. and,
A large structure P is assembled on the surface plate 3, and the necessary pipes and equipment are installed (see Figure 1).

After the structure P is completed, water is poured into the dock 1 and the float 2 is installed.
The structure P is levitated together with the surface plate 3 (see Fig. 2).

Then, the structure P is towed to the ocean area where the submersible barge 4 has been sunk in advance, and positioned just above the barge 4.

A cradle 5 is placed in advance on the deck of the barge 4 (see Fig. 3).

The submersible barge 4 can be submerged as follows (scraping is recommended).

That is, after the barge 4 is towed to a predetermined sea area, the barge 4 is moored by anchoring (see FIG. 4), and seawater ballast is injected into the barge 4 to sink the barge 4 (see FIG. 5).

At this time, the upper part of the pedestal 5 may protrude above the water surface, or the entire part may be submerged below the water surface.

Preferably, a plurality of structures P on the surface plate 3 are connected in a line and towed by a tug boat 6 to a position above the submerged barge 4 (see FIG. 6).

At this time, the pedestal 5 also serves as a guide for the float 2.

After all the structures P are set in the predetermined positions above the barge 4, the ballast of the barge 4 is drained and the barge 4 is floated, and the structure P on the surface plate 3 is placed on the pedestal 5 at its center. The float 2 is supported and removed from the surface plate 3 (see FIG. 7).

For drainage from the barge 4, condensed air may be sent into the ballast tank of the barge 4, and the seawater may be forcibly discharged by this condensed air through a check valve.

After this, the float 2 is carried out from under the surface plate 3 (8th
(see figure).

This float 2 is used again for the construction of structure P in dock 1.

Then, a support stand 7 with a jack is placed at the position where the float 2 was located, and the structure P is lifted up together with the surface plate 3 by jacking up, and the pedestal 5 is carried out (see FIGS. 9 and 10).

As the support stand 7, it is preferable to use one having a recess formed in its upper end surface, and in which the jack 8 and the recess are housed.

After carrying out the cradle 5, it is jacked down to support the structure P on the surface plate 3 on the upper end surface of the support pedestal 7, and the jack 8 is taken out (see FIG. 11).

The pedestal 5 and the jack 8 are used again.

Finally, the structure P whose both sides are supported by the support stand 7
Secure it with wire 9 etc. to make it possible for ocean navigation (
(See Figure 12).

Thereafter, the barge 4 carrying the large structure P is towed to the area where the structure P is to be installed.

In this example, it is possible to carry out a heavy large structure P from the dock 1 and load it onto the barge 4 without using any crane.

Further, since a plurality of large structures P can be loaded onto the barge 4 at once, work efficiency is extremely high.

It is economical because the cradle 5 and float 2 can be used at any time.

13 to 20 show other examples.

Two types of flows HL12 are used here, and the float 12 located at the center is higher and wider than the floats 11 located on both sides of the surface plate 3.

The float 11 is placed on the board 13, and both flows N1 and 12
A surface plate 3 is placed on the surface plate 3 with the heights of the upper end surfaces thereof being made the same, and a large structure P is assembled on the surface plate 3 (see FIG. 13).

After that, as above, water is poured into the tank 1 and the structure P
(see Figure 14) and tow it to a position above submersible barge 4, which has been submerged in advance (see Figure 14).
(see figure).

No cradle is provided on the barge 4.

After setting the structure P at a predetermined position above the barge 4,
If the barge 4 is floated, the structure P will be moved to the center float 1.
2 supported on the barge 4 by floats 11 on both sides.
Since the height is low, it comes off from the surface plate 3 (see Figure 16).

The floats 11 on both sides are carried out, the support stand 7 with a jack is inserted in that position (see FIG. 17), and the center float 12 is pulled out in the front-rear direction by jacking it up (see FIG. 18).

The subsequent work is the same as in the above example, and the structure P is jacked down to be supported on the upper end surface of the support base 7, the jack 8 is taken out (see Fig. 19), and finally the structure P is attached to the wire 9. (See Figure 20).

If necessary, a jack 14 is interposed in the center to assist support of the structure P by the support base 7.

In this example, two types of floats HL12 are used to support the surface plate 3 and the structure P not only on both sides but also in the center. The load of the structure P applied to the surface plate 3 is uniform, and no strain is placed on the surface plate 3, which is extremely safe and convenient in terms of design.

Furthermore, since the center float 12 also serves as a pedestal, no pedestal is required.

In addition, Fig. 16 and Fig. 17 (here, the float 12
Although the full load of the structure P is applied only to the bridge, there is no problem because it is only temporary.

The structure mounted on the barge 4 in this manner is transported to the construction site and brought ashore by the following method.

Figures 21 to 23 (here, a moat 21 for purge introduction is dug in advance on the local coast S, and the barge 4 carrying the structure P is pulled into this moat 21 (see Figure 21) ).

After that, taking advantage of the low tide, earth and sand are piled up at the entrance to the moat 21 using a flutosaur (indicated by 22), and the entrance is closed.
Also, earth and sand is deposited between the barge 4 and the land to create a road 23 through which the trailer can pass (see Figure 22).

It is preferable that the entrance/exit closure 22 is a water gate, and if necessary, the seawater in the moat 21 can be drained.

When the above preparations are completed, put the trailer 24 for transporting heavy objects with a jack between the support stands 7 on both sides, and move the structure P to the surface plate 3.
The entire unit is loaded onto a trailer 24 and transported to the installation location (see Fig. 23).

By opening the entrance and exit of the moat 21 at low tide and using the high tide, the barge 4 in the moat 21 can be easily pulled out to sea.

If barge 4 has a structure that allows it to land directly on the shore,
As shown in FIGS. 24 and 25, the barge 4 is run aground on the shore S at high tide, a road 25 is created between the barge 4 and the land using a bulldozer at low tide, and the structure P is moved with the trailer 24 in the same manner as above. It can be carried out from the barge 4.

It is best to take advantage of the full morning period for purge 4 when leaving the reef.

As described above, according to the present invention, even if the weight of the large structure exceeds the lifting capacity of the crane, there is no need to construct a new crane with a larger lifting capacity, and the large structure can be assembled easily and reliably. Items can be purged and therefore transported to their destination.

In addition, the presence of the surface plate used when standing up the dog-shaped structure allows for smooth loading of large structures onto the purge.
The surface plate itself has the advantage of being able to serve as the basis for installing large structures at the destination.

[Brief explanation of drawings]

1 to 12 show the working procedure of an example of the present invention.
Figures A and 6A are plan views, Figures 4B and 5B are side views, Figures 6B and 7 to 9 are front views, and Figures 10 and 9 are front views. FIG. 11 is a sectional view of the support base, FIG. 12 is a front view, FIGS. 13 to 20 are front views showing working procedures of other examples of the present invention, and FIGS. 21 to 25 are large-scale structures. 21 and 22 are plan views, FIG. 23 is a front view, and FIGS. 24 and 25 are side views. 1...Dock, 2,11...Float, 3...Surface plate, 4...Purge, P...
...Dog-shaped structure.

Claims (1)

[Claims] 1 Place the surface plate 3 on the bottom of the dock 1 with the floats 2 and 11 interposed at least near both sides, assemble the large structure P on the surface plate 3, and pour water into the dock 1 to increase the flow 1.
-2, 11 to float the structure P along with the surface plate 3, while submerging the submersible barge 4 in a predetermined sea area, move the floats 2, 11 from the dock 1 to the position directly above where the barge 4 is sunk. A method for constructing and transporting a large structure, which comprises loading the large structure P together with the surface plate 3 onto the barge 4 by towing and levitating the barge 4.