JPS58145590A - Floater for towing and setting of marine structure - Google Patents

Abstract

PURPOSE:To transport a marine structure to the site safely by towing without falling of the structure, by providing floats which can be flooded or discharged at right and left lower parts and by supporting a marine structure in a floater consisting of floats each of which is connected to each other via upper frame bodies. CONSTITUTION:Floats 3 which can be flooded or discharged, are provided at right and left lower parts. Hollow columns 4 are erected at both fore and aft positions of these floats 3, and each column top is connected to each other with a truss structured frame body 5. The aft ends of floats 3 are also connected to each other by a truss structured frame body 6. The floats 3 are flooded or discharged to adjust their drafts. Then a marine structure such as a concrete caisson or platform is hung down through a supporting piece at the inside of right and left floats 3, and it is towed by sea to the site.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete caisson for towing and sinking marine structures, particularly a concrete caisson for seawalls or breakwaters of artificial islands constructed offshore, and a concrete grater for oil drilling on the seabed. This invention relates to a floater for floating so-called marine structures such as ohms on the sea, towing them, and sinking them at the site.

Conventionally, large concrete caissons for seawalls or breakwaters constructed in deep offshore waters are manufactured in high-quality caisson manufacturing yards and then floated and towed to long-haul construction sites. There's a problem.

1) When the boat is floating, its center of gravity becomes high, and when it is towed, waves may cover the top of the boat and there is a risk of it capsizing during towing.

2) If there is shallow water like the caisson's swamp while being towed, there is a problem that transportation will not be possible.

3) If the caisson has a wave-dissipating function on one side of its upper part, the center of gravity will be shifted from the center of the caisson, so if it is floated on the sea, it will easily fall over and even be problematic. To become a.

4) J111 When towing a concrete structure that does not float on its own to the site, the task becomes even more difficult.

The towing and sinking cargo for offshore structures of the present invention is designed to solve the above problems, and has three hollow 70-tubes capable of injecting and draining water into the interior thereof. an element, a retaining part for a marine structure formed on the upper part of the float element, a round column that stands on its own at the front and back positions of the float element, a connecting truss that connects the upper parts of the column, and the two floats. It is characterized by a stopper that connects the rear parts of the elements and a strong resistance.

Below is li! The present invention will be described in detail by l#i.

In the figure, reference numeral 1 indicates a marine structure such as a contour caisson for a single-shore breakwater, which is hollow inside.
It has a retaining part that engages with the ear part 2 from its lower surface, and has a K so that water can be injected and drained into the inside thereof.
A 2 1gA steel hollow float element 3 is provided, and a hollow pillar 4 is made to stand on its own at the front and back positions of this float element 3,
The upper ends of the pillars 4 located at the front and rear parts of the 70-toe cables 3 are connected by a connecting truss 5, and the rear parts of the two float elements 3 are connected by a stopper 6. be configured. Further, in the floater 7 of the present invention, the buoyancy is mainly due to the hollow float element 3.
The pillar 4 provided on the hollow float element 3 extends from its lower part to the upper part K and IIy? Gradually reduce the area and maintain a large restoring force.

Incidentally, the nine ears 2 provided on both sides of the marine structure 1 may be detachable.

Since the floater of the present invention has the above-described configuration, when towing a marine structure using the floater, the following procedure is performed.

il) As shown in the gz diagram, fill the floater 7 with water and submerge it in the sea to a certain extent, move the floater 7 forward, and place the marine structure 1 inside it from the front side.

4. As shown in Fig. 3, the water in the floater 7 is removed to increase the buoyancy, and the floating structure 70 is lifted up through the ears 2 to reduce the amount of water that it sips. to prevent the ship from running aground in shallow water while being towed.

Moreover, as a result, the height and center of gravity are raised, and the marine structure 1 is prevented from falling over due to being hit by waves while being towed.

(4) In the state shown in FIG. 1, drag the floater 7 forward to tow the marine structure 1 through the stopper 6.

Furthermore, the method of sinking a marine structure using the floater of the present invention is as follows.

(1) As shown in the iris 4, water is poured into the marine structure 1 and the marine structure 1 is made to sink while resisting the buoyancy of the floater 7.

As shown in Fig. tsigs, the marine structure 1 is sunk to the seabed, and after death, water is poured into the floater 7 to sink the floater 70 so that the float element 3 is detached from the ear of the marine structure 1.

(3) In the state shown in FIG. 5, pull the 70-ta 7 backward so that only the marine structure 1 remains.

As described above, by using the floater of the present invention, even if a marine structure is floating on the sea and has a deep dead water, it is possible to make the dead water of the marine structure shallow by the buoyancy of 70 mm. - Since the boat has four pillars 4, it can be used even when towing offshore structures that are prone to tipping over due to the location of the center of gravity.
- The restoring force of the container is extremely large, so it will not fall over.

Therefore, by using the floater of the present invention, marine structures can be towed and sunk extremely safely and easily, and when the marine structure is sunk, the position of the rounded floater where the 70-meter sinks together can be adjusted. Accuracy There is a great advantage in that the positioning of offshore structures can be made more accurate.

In addition, even if a special concrete structure is manufactured which cannot float on its own due to its heavy weight when completed, it can be easily towed and sunk by using the present invention. It is also conceivable to make a part that can float in a caisson yard, etc., and then hold it using the floater of the present invention and construct the remaining part. In addition, in the case of a structure that would tip over due to the center of gravity when floating on the sea, the floater of the present invention can be used to first complete the lower half that will not tip over, store it in the floater at the time of running, and then manufacture the upper half. can be used.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the floater of the present invention, and FIGS. 2 to III! I
1m is an explanation showing how the present invention 70 is used. l...Marine structure, 2...Ear portion, 3...Float element, 4...Column, 5...Connection truss, 6...Stopper, 1...70-ta. +1 decoy +21] +40 +30 +5 circles

Claims (1)

[Claims] (1) Two hollow float elements into which water can be injected and drained, a retaining part formed on the upper part of the float elements to the nine marine structures, and the front and rear positions of the -99 float elements. Towing and evacuation of a marine structure, characterized in that it consists of a column that is erected on the ground, a connecting truss that connects the upper parts of the column, and a stopper that connects the rear parts of the two float elements. Floater for submerged installation.