JPS5973389A - Process of launching concrete structure - Google Patents

Abstract

PURPOSE:To efficiently launch a structure on the sea, by carrying out a prosess comprising the steps of arranging, on the bottom ground of the shallow water, a floating dock which is connectable to the land, floating up the dock onto which the structure is beforehand transferred, and submerging the dock in a deep sea area. CONSTITUTION:A concrete structure 2 which has been manufactured on the land 6 is loaded on a floating dock 1 which is arranged on the bottom ground 5 of the shallow water and which is connectable to the land 6. Then, ballast-adjustment is made to the floating dock 2 to float up the latter, and thereafter, is towed to a deep sea area where the floating dock 1 is alone submerged. Therefore, the concrete structure 2 is in the condition of being launched on the sea. With such a simple equipment a very heavy concrete structure may be efficiently launched.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in construction methods for launching, for example, breakwaters and other concrete IJ-structures into water. The purpose of the present invention is to provide a method for launching concrete structures into water safely while reducing the time required.

Conventionally, as a method for launching a concrete structure into water, for example, as shown in FIG. Installed from land to underwater,
The concrete structure 11k is placed on a trolley 13 that can move on the slope 12, and (b) the slope L as shown in the figure.
There is a method of moving the concrete structure/proboscis 11 into water H as if launching a boat, and using the buoyancy of this structure itself to float it on the water surface. 1. As another method, as shown in FIG.
These winches 15 are configured to operate in synchronization with each other, and the wires of the winches 15 are connected to the elevator platform 16, and a concrete structure built on land using the equipment configured in this way is constructed. 'There is a method of putting the snout 11 under water. That is, Fig. 51 (
b)～(/As shown in U, after moving the concrete structure 11 onto the elevator platform 16 via the platform 13,
As shown in Figure 1), there is a method in which the winch 15 is operated to lower the elevator platform 16 into the water, and at this time the structure is floated on the water surface by the buoyancy of the structure itself and water is passed through it.

However, the former method requires the effort of constructing a slope extending from land into the water, and the latter method requires the elevator platform 16 to be lowered into the water while maintaining balance, which requires a large number of winches for each winch. 1
It is necessary to provide a control means to drive each of the parts 5 while adjusting each of them, and either method requires a huge amount of equipment cost, takes a long construction period, and is subject to weather conditions. It was accompanied by drawbacks such as safety issues.

The present invention aims to solve the above-mentioned drawbacks, and will be described below with reference to the drawings.

Figures 1 (a) to 0 show the equipment used to carry out the present invention. On both sides of the main body 1a, auxiliary feet ib in the form of side walls are erected as necessary to obtain a suitable balance when the main body 1a is lowered.

In addition, floating docks Y can be sunk in the four corners of the main body 1a,
A pouring and draining valve IC is provided for floating. 52←↓Concrete structure, trolley for transporting the three-legged concrete structure 2, 4a.

Reference numeral 4b denotes a trolley fg moving means such as rails laid on the upper surface of the floating dock body 1a and the work surface on land, respectively, and 5 denotes a shallow underwater ground (a).

Next, an embodiment of the concrete IJ-tree structure proboscising method of the present invention will be described.

A shallow place near the shore of the sea, a river, a lake, or an artificially shallow place is created, and the floating tonk 1 is floated on the water surface of this place, and then a small amount of water is placed inside the floating dock 1. By injecting water, the floating dock is lowered to a height where its upper end almost matches the upper end of the land 6, and is stably fixed on the local water bottom ground 5 in a shallow water depth. The manufactured concrete structure 2 is placed on a cart 3 (see FIG. 2(a)) and placed on the floating truck 1 via moving means 4a, 4b such as rails.

Next, let's take a look at the small amount of water poured inside Floating Tonk 1. Then, the concrete structure 2 and the truck 3 are placed on top of the floating dock (see Fig. 2 (o)).

However, the floating object that surfaced, Tsuku IS? The ship leaks into deep water due to transportation, etc., and water is injected into the floating dock again to sink the floating dock L and the truck 3 into the water, and the concrete structure 2 is floated by its own buoyancy. As a result, the concrete structure 2 and the truck 3 are separated (see Fig. 2 G-1).

After that, by draining the water from the floating dock V that has been submerged in the water, the floating dock ↓ is floated again to a shallow place, and a small amount of water is injected to sink and fix it to the underwater ground 5. , the trolley 3 is used as a concrete IJ-to structure 2 on land.
By moving the structure to the manufacturing location and repeating the above steps as appropriate, it is possible to launch a large number of structures manufactured on land into the water one after another.

According to the above four aspects of the present invention, there is no need to install large-scale slopes or elevators as in the conventional construction method, so the construction period is shortened, and equipment costs and post-equipment maintenance costs are reduced. It has the effect of reducing the I41K by a large amount.

Fig. 3 shows another embodiment of the present invention, in which a rectangular recess 7 is provided in a part of the land, and ridges f) a and 6b on the left and right sides of the recess are respectively shaped like rails. transportation means 4b',
4b' is provided, and the concrete structure 2 can be moved from any left or right side to the floating dock 1 fixed on the underwater ground in the recess 7.

Furthermore, it is also possible to provide a moving means 4g' in the ridge 6C in front of the recess 7 as shown by the broken line, and move the concrete structure 2 into the floating dock L from any location on the surface. be.

Therefore, in this embodiment, eJ, for example, when the concrete structure 2 is transferred from the right ridge 6a to the floating dock 1 and launched, it is transferred to the left ridge 6b and/or the front ridge 6C. The concrete structure 2 is kept on standby, and the ILI+ floating dock L is placed in the recess 7, or a newly prepared floating dock is placed.

It has the advantage that the concrete structure 2 can be layered and the work efficiency is good.

Because recess 7 serves as an inlet, a port, etc., the waves on the water surface are calm and reconcavity 1'fI+
) It has the advantage of being able to slowly transition Relic 2 to a floating dots quest.

[Brief explanation of drawings]

Figures 1(a) to 1) are explanatory diagrams showing equipment that can be used in the present invention, Figures 2(a) to 2) are process diagrams of an embodiment of the construction method according to the present invention, and Figure 3 4(A), (0) and FIG. 5(A) to (gradients indicate conventional examples, respectively. 1. Floating dock, 1a...Main body, 1b. ... Auxiliary float, 1c... Filling and draining valve, 2... Concrete structure proboscis, 3... Trolley, 4a, 4b... Means of transportation, 5. Underwater ground, 6. Land. 2 Figure 5 Figure (B) @5 Figure 471-

Claims (1)

[Claims] A floating dock that can be connected to land is installed on shallow underwater ground,
After transferring the concrete structure manufactured on land onto this, the floating dock is floated, and then the floating dock is sunk into the water by leaking into deep water, and then the concrete IJ structure is Concrete structure that separates objects from the floating tonk (Nano launch construction method).