JPS60258317A - Method of installing plant burge - Google Patents

Abstract

PURPOSE:To reduce a construction cost, by a method wherein, after a plant burge is moved in a pond communicated with sea and the like, the pond is isolated from the sea, and semifluid is made to flow in the pond to bring the burge into a float on the semifluid. CONSTITUTION:After a pond 13, communicated with sea or river 2, is built on a land 1, a plant burge 5 is moved into the pond 3. After a weir 4, which partitions a communicating part between the pond 3 and the sea or the river 2, is built, semifluid 6, such as mixture of sand and water, mud or pitchlike material, is made to flow in the pond 3. Uniform buoyancy A is exerted on the burge 5 by the semifluid 6, and the burge is then installed in a condition in which it floats in the semifluid 6. This eliminates reinforcement of a ground by means of pile driving or concrete bed, which forms the foundation of the burge 5, resulting in a reduction in a cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for installing a plant barge, and more particularly, to a method for installing a plant barge in which the plant barge is suspended on a semi-fluid.

[Prior art]

Conventional barge installation methods can be roughly divided into two types: a 70-ring type and a fixed type. A floating type is a plant barge installed underwater or in a river.

Installation methods include single-point mooring, multi-point mooring, tension leg mooring, dolphin mooring, and clamp mooring.

On the other hand, the fixed type is an elevating type that fixes the purge to a rig fixed on the seabed (or river bed).

Reclaim the seabed (or riverbed) so that a small amount of water remains,
There are two methods: a bottom-mounted type in which the purge is placed on top of the reclaimed soil, and a pull-in method in which a part of the land is excavated and the purge is moved there, and then the gap between the sea (or river) and the purge is backfilled. be.

In the floating method, the purge can be easily moved, but the amount of purge movement is large due to the influence of wind and waves. On the other hand, with a fixed method, the effects of wind and waves can be avoided, but it is difficult to move the purge.

Therefore, as a method of installing a plant barge in which the plant barge is suspended on a semi-fluid, a patent application filed in 1973 by the same applicant was proposed.
No. 9-18209, and the present invention relates to an improvement thereof.

FIGS. 2(a) to 2(e) show an already proposed method for installing a plant barge in which the plant barge is suspended on a semi-fluid. will be explained below with reference to FIGS. 2(,) to (e). Second
In figure (a), ■ indicates land, and 2 indicates sea or river.

First, a bond 3 is provided on the land l by a method such as excavation (FIG. 2(b)). This bond 3 is excavated so that a bank 4 is left between the bond 3 and the sea or river 2 so that water from the sea or river 2 does not enter the bond 3. Next, a decomposed semi-fluid 6 is laid within the bond 3 (FIG. 2 (0)). This semi-fluid 6 has a higher viscosity and specific gravity than water. Next, bank 4
is removed and water is allowed to infiltrate into the bond 3 (see Figure 2 (d)
)). At this time, the semi-fluid 6 is viscous.

Since the specific gravity is also higher than that of water, even if water enters the bond 8, the semi-liquid 6 hardly flows out. Thus, the plant barge 5 is moved above the semi-fluid 6. Next, the embankment 4 that separates the bond 8 from the sea or the river 2 is rebuilt, the water in the bond 3 is drained, and the plant barge 5 is installed floating on the semi-fluid body 6 (Fig. 2(e)). )
.

In this case, the plant barge 5 receives a uniform buoyant force A from the semi-fluid 6, so the plant barge 5 does not tilt significantly.

As mentioned above, the previously proposed plan and purge installation method of floating a plant barge on a semi-fluid has many advantages, but after the semi-fluid is laid in the bond,
Because water from the sea or river is allowed to enter the bond, there is a possibility that semi-liquid fluids may flow out depending on the situation.Also, once the embankment at the boundary between the bond and the sea or river has been removed, it may not be possible to reuse it. Because it required construction, the disadvantage was that the civil engineering costs were high.

[Summary of the invention]

Therefore, the present invention has been made to solve the problems of the prior art described above, and is to connect the sea or river to a bond by using a natural inlet of the sea or river, or by a method such as excavation. After moving the plant barge (made of steel, lightweight concrete, etc.) into the bond, constructing an embankment to cut off the connection between the bond and the sea or river, and then moving the plant barge (made of steel, lightweight concrete, etc.) into the bond. Excess water in the bond is discharged while flowing a semi-fluid with higher viscosity and specific gravity than water, or a substance that becomes a semi-fluid when mixed with water, and finally the plant barge is placed on top of the semi-fluid. The purpose of this invention is to provide a low-cost method for installing a plant barge, in which the semi-liquid does not flow into the river or into the river.

In other words, the method for installing a plant barge of the present invention is to move the plant barge into a bond communicating with the sea or river, then cut off the bond from the sea or river, and then mix semi-fluid or water in the bond. This system is characterized by allowing a substance to become a semi-fluid to flow in, and floating a plant barge on top of the semi-fluid.

[Embodiments of the invention]

The present invention will be described in detail below with reference to the drawings.

Figures 1 (a) to (,) show the method of installing a plant cage according to the present invention, where l is land, 2 is sea or river, The dashed line shows the case of a natural cove. First, a bond 3 is provided on the land l by using a natural cove or by a method such as excavation, and the plant barge 5 is moved into the bond 3 (FIG. 1(b)).

This construction method.

The most economical method is to use mud as a semi-fluid, and it is even more effective when the land is a swamp or the like and solid foundation construction is not possible. Next, an embankment 4 is constructed that separates the connection between the bond 3 and the sea or river 2 (Fig. 1 (C)).

Next, a semi-fluid (or a substance that becomes a semi-fluid when mixed with water) 6 is allowed to flow into the bond 3 . At this time, the excess water is forced to overflow from bank 4).

It is discharged through a communication pipe 7 provided on the embankment 4. Of course, the water may be drained using a pump (Fig. 1(d)).

The semi-fluid 6 is a mixture of sand and water.

Examples of this semi-fluid material include muddy soil and vinyl-like substances.

(1) When the plant purge is installed on a semi-fluid, buoyancy acts on the plant purge.

(2) Viscosity and specific gravity are higher than water.

etc. can be mentioned.

In this way, the plant barge 5 receives a uniform buoyant force A from the semi-fluid 6 and is installed in a floating state in the semi-fluid 6 (FIG. 1(e)). In this way, the plant barge 5 is in a state where it receives an even buoyant force from the semi-fluid body 6, so the plant barge 5 does not tilt significantly.

The depth of the bond 3 must be such that the plant barge 5 does not come into contact with the land 1 when the plant barge 5 is floating on the semi-fluid body 6. Needless to say, the thickness must be such that the plant barge 5 and the land 1 do not come into contact with each other.

In addition, the liquid level height of the semi-fluid after installation is arbitrary, but it will increase or decrease due to water evaporation, rainfall, etc., so in order to facilitate liquid level adjustment, the height should be approximately the same as the average water level of the sea or river. It is desirable to make them equal, and in that case, it is preferable to provide the communication pipe 7 and the same gate valve 8 at the necessary positions for liquid level adjustment.

〔Effect of the invention〕

As explained above, according to the present invention, the following remarkable effects can be obtained.

(1) There is no need for piling as a purge foundation or ground reinforcement using concrete beds, etc., resulting in cost reduction. This is especially true when a natural cove is used, or when the land adjacent to the sea or river is a swamp, making it impossible to construct a solid foundation.

Civil engineering costs can be significantly reduced.

(2) There is no need to flatten the bottom surface of the bond, resulting in cost reduction.

(3) After installation, the plant barge can be easily moved to another location by the relatively simple construction of removing the embankment again.

(4) Since the corrosion resistance of the plant barge can be improved by appropriately selecting the material of the semi-fluid, the life of the plant barge can be extended with minimal maintenance costs.

(5) Since the buoyant force from the semi-fluid is applied evenly to the plant barge, the plant barge does not receive concentrated loads from the foundation, so there is no need to build it into a sturdy structure, reducing purge production costs. I can do it. ', (6) Compared to the conventional 70-ting type that floats on the water surface, it is cut off from the sea or river by an embankment, so
Unaffected by tides and external wind and waves.

Furthermore, the viscosity of the semi-fluid can prevent the plant barge from shaking due to wind.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a plant purge installation method in which a plant barge of the present invention is floated on a semi-fluid, and Fig. 2 is an explanatory diagram showing a plant purge installation method in which a plant barge of the present invention is floated on a semi-fluid. It is an explanatory diagram showing a method. 1...Land, 2...Sea or river, 3...
···bond. 4... Bank, 5... Plant barge, 6
・・・・・・Semi-liquid. ? ...Communication pipe, 8...Gate valve Patent applicant Mitsui Engineering & Shipbuilding Co., Ltd. Figure 1 Figure 2

Claims (1)

[Scope of Claims] After providing a bond leading to the sea or a river and moving the plant purge into the bond, providing a boundary section between the bonds and the sea or river, and then forming a boundary part between the bonds, and then moving the plant purge into the bond. Fluid or. Inject a substance that becomes a semi-liquid when mixed with water. At the same time, drain the water in the bond from the top,
A method for installing a plant barge, comprising floating the plant barge on the semi-fluid.