JPS6137587A - Oceanic coupling method of marine structure - Google Patents

Abstract

PURPOSE:To facilitate movements of each structure to be joined with a sliding block, by mounting each structure floated on the sea on a submersible ponpoon provided with the sliding block disposing moving balls on the top. CONSTITUTION:A sliding block 4 disposing a lot of moving balls is attached to the top of a submersible pontoon 5, and this pontoon 5 is sunk in the specified depth of water in advance. Each of structures 11 and 12 to be joined is floated on the sea and situated in an upper part of the pontoon 5. Next, the pontoon 5 is floated on the surface of the water, and each of these structures 11 and 12 is mounted on the sliding block 4. Movement for butting join surfaces 11a and 11b of each of these structures 11 and 12 takes place with the sliding block 4 whereby these shifting operations are performable in an easy manner.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for joining structures on the ocean, particularly in docks and the like. Large ocean structures that are impossible to navigate! The present invention relates to a method for connecting structures on the ocean, which is suitable for use when constructing a structure.

``Prior Art'' In general, bottom-mounted offshore structures called artificial islands are used when drilling or producing oil offshore, for example.

By the way, the above-mentioned offshore structures used for oil test drilling and production are particularly important in areas far away from the mining site due to the depletion of oil resources.
There is a tendency for them to become larger due to deterioration, and it is becoming impossible to construct them using existing construction dogs.

Therefore, conventionally, as shown in Figure tIJ4 or Figure 5, after the marine structure is divided into multiple parts and constructed, each of the 61 structures is towed to the desired location in a floating state.
Later, the so-called offshore connection method, in which structures are connected to each other offshore, has been widely used.

That is, in the former case, as shown in FIG. 4(A), each structure 1 has a floating structure and its connecting portion 1a is exposed from the water surface, and as shown in FIG. 4(B), ), each structure 1 is pulled together and their connecting portions 18 are butted together, and then the connecting portions 1a are connected and movable by welding or the like.

In addition, the latter is placed in water in advance as shown in Fig. 5 (A).
f7? After each structure 2 is towed above the floatable bontoon 3 that has been set up, the bontoon 3 is floated and brought into contact with each structure 2, as shown in FIG. Each structure 2 is raised slightly to the extent that it does not receive the wave W3e, and then, as shown by the arrow in Figure CB), each structure 2 is pulled and its contact portion 2a
After butting them together, the bontoon 3 is further floated to completely expose each structure 2 above the water, as shown in FIG. They are designed to be interconnected.

"Problems to be Solved by the Invention" The present invention is intended to solve the following problems in the prior art described in 11.

In other words, in the former technique, if a wave is generated when connecting each 1m structure, each structure 1 swings individually and moves in phase ^・I, so that the connecting part of each structure is For example, positional deviations as shown in FIG. 4 (C) constantly occur, and as a result, the connections between the structures 1 become loose. 1.F., 11;j When the above-mentioned connections are made by welding, even the slightest deviation will cause cracks in the welded portion, so it is necessary to take sufficient measures to prevent this.

Further, in the latter technique, although the relative positional deviation between the structures 1 as described above does not occur, it has the following problem. That is, when aligning the connecting parts 28 of each structure 2, it is necessary to levitate each structure 2 to such an extent that it is not affected by waves and slide it on the bontoon 3. The problem is that the reduced buoyancy acts as a contact pressure between the structure 2 and the bontoon 3, which increases the resistance when moving the structure 2 and complicates the alignment work. . This kind of problem will be further aggravated when the height of the structure 2 is increased to further suppress the chromatic tube of waves, so it is necessary to ensure that the fit between both parties is sufficiently adjusted. ! The work must be carried out in accordance with the ζ position.

[One step to solve the problem 1 The present invention is 0; 1
It's also possible to effectively overcome the problems of the prior art described above.
The purpose of this method is to provide an offshore bonding force method for structures that can be connected by submerging a floatable bontoon with a slide attached to a predetermined depth in the water with the slide upward. After towing the structure while floating on the water and positioning it above the bontoon, the bontoon is floated to push up each structure and expose its connection parts above the water. Next, by moving each structure along the slide, the respective connection parts are aligned, and then the connections between the structures are determined as a vf feature.

1 action J The marine bonding force method for structures related to the present invention is performed by pushing the structure to be connected 1 upward by pushing the slide up with an IAI ratio bontoon and moving it on the slide. The purpose is to reliably suppress the influence of waves on the structure, and to make the movement of the structure smooth when aligning the connection parts, thereby making the joining work more convenient.

"Embodiment" A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

First, to explain the slide used in this embodiment, as shown in FIGS. 1 and 2, the slide 4 is integrally attached to the upper surface of the bontoon 5 (upper part in FIG. 1). The movable body 7 is provided with a base body 6 and a movable body 7 which is slidably placed on the base body 6.

The base body 6 has a locking protrusion 8 projecting upward on the same edge thereof.
is provided, and the locking protrusion 8 comes into contact with the movable body 7 to prevent the movable body 7 from falling off from the base body 6.

The movable body 7 is removably installed on the base body 6 and includes a plurality of rolling bodies 9 such as gA balls on which structures 11.12 are mounted, and the rolling bodies 9 are rotatable in a penetrating shape. At the same time, the relative position of each rolling element 9 is
It is composed of a holder 10 that moves to restrict the row relationship.

In addition, 1iiJ retainer 10 is located at the bottom of the periphery.
j. Contact with the upper ini of the W body 6 to maintain the distance from the W body 6, and contact with the rolling element 9,! A skirt portion Ion that holds :F approximately at the center of the rolling element 9 is provided in succession.

Therefore, each structure 1 placed on the bontoon 5
1.12 is brought into contact with the rolling element 9 of the +1ij movable body 7, and is smoothly moved relative to the bontoon 5 by the rotation of the rolling element 9.

To explain a method for connecting structures 11 and 12 on the ocean using a bontoon 5 equipped with such a slide 4, first,
Each δ structure 11.12 is placed in a state of floating on water as shown in Figure 3 (A), and these structures 11.12 are towed and placed in the water in advance as shown in Figure 3 (B). Each connection portion 11a is placed above the bontoon 5 sunk to a predetermined depth.
12a are placed facing each other in position E, and are temporarily fixed together using wire lobes 13 or the like.

Next, after raising the pontoon 5 17 and bringing the lower surfaces of each structure 11 and 12 into contact with the slide 4 on its upper surface, the pontoon 5 is further levitated to float each structure 11 and ]2. It is exposed above water as shown in FIG. 3(C).

On the other hand, in the process of floating the structure 11.12, if the two structures 11.12 have different sinking depths, as shown in Section 3-1(B), the bontoon 5 Regarding levitation, the structure 11 is in an inclined state from when it contacts the lower surface of the structure 11 with a deep sinking depth until it comes into contact with the other structure 12. And Bontoon 5 like this
If this inclination is made, unnecessary movement will occur in the movable body 7, and there is a possibility that the positional relationship between the structures 11 and 12 opposed to the bontoon 5 will be shifted. Therefore, in this embodiment, the movable body 7 is moved relative to the base 6 until the bontoon 5 and each structure 11.12 are completely in contact with each other, or until each structure 11.12 is completely exposed above the water. Appropriate locking 5! Temporary IL is performed using a position c (not shown).

Then, after exposing each structure 11.12 above the water as described above, by releasing the temporary fixing of the movable body 7 and moving each structure 11.12 on the slide 4,
By bringing the respective connecting portions 11a and 12a close to each other to a desired pressure a or abutting them against each other, the respective structures 11 and 12 are aligned as shown in Fig. m3 (D).

Thereafter, the connections 11a, 1 of each structure 11.12
28 and then re-submerging the bontoons 5 away from the structure 11.12 completes the bonding of the structure 11.12.

When the structures 11.12 are connected at sea by such a method, each structure 11.1 is connected by the bontoon 5.
2 is bonded with them exposed above the water,
It completely prevents the waves from reaching each structure 11, 12, eliminates the positional shift of the connecting parts 11a, 12a rJ], and thereby makes the joining work easy and reliable. In addition, when aligning each structure 11.12, even if each phase relic 11.12 is completely floating and no η force is acting, the structure 11.12 and What is the contact pressure between the bontoon 5 and the bontoon 5? It is reduced by the rolling elements 9 of the slide 4 interposed between the i+7 structures 11 and 12, smoothing the relative movement between the two, and making the positioning work much easier.

In the above embodiment, the slide 4 is connected to the base 6 and the rolling elements 9.
Although an example has been shown in which the movable body 7 includes a holder 10 and a holder 10, the structure is not limited to this. It can also be configured by attaching.

In such a configuration, by interposing water between the circular polymer materials, the sliding between the two can be further stabilized and prevented. Further, although an example has been shown in which the entire structure is exposed above the water when the structures are connected, only the connecting portion may be exposed.

"Effects of the Invention" As explained above, the method for joining structures at sea according to the present invention provides the following advantages.゛■ Each structure is supported by bontoons, and at least the connecting portions are exposed above the water and connected with as little buoyancy as possible. : It is possible to stop the above-mentioned problems and to restrain the relative movement between the structures, thereby eliminating misalignment between the connecting parts.

0 people When aligning structures, even if each structure is completely floating and no buoyant force is acting on each structure, it is necessary to The equipped slide sufficiently reduces the contact pressure generated between the two, making the 411N movement between the structure and the bontoon smoother, and combined with the above effect, the positioning work of the structure and the joining work are made easier. do.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention.
Fig. 1 is a schematic front view with a part cut away to explain the bontoon, Fig. 2 is an enlarged view of the part ■ in Fig. 1, Fig. 3 is a process diagram of one embodiment, Figs. Each figure is a schematic process diagram showing the conventional offshore bonding force method. 4... Slide, -5... Bontoon, 6... Base,
7... Movable body, 9... Locking protrusion, 10... Holder, 10g... Skirt part, 11.12... Structure,
: i, s 12u--Connection part. Figure 3 Figure 4 Electrical A1

Claims (1)

[Claims] A method of connecting multiple structures at sea to each other at sea, in which a floatable bontoon with a slide attached is submerged at a predetermined depth underwater with the slide upward. , after each structure is towed floating on water and positioned above the bontoon, each structure is pushed up by floating the bontoon to expose its connection part above the water, and then each structure is 1. A method for connecting structures at sea, the method comprising: aligning each connection part by moving the structure along a slide; and then connecting each structure.