JPS6036546Y2 - Marine civil engineering vessel - Google Patents

Description

[Detailed description of the invention] When constructing a seawall in the ocean using conventional construction methods, the most difficult task is to construct a stone embankment as the foundation for the seawall.

The reason for this is that when foundation rubble is repeatedly subjected to wave forces that affect the seawall, especially extremely strong water pressure such as in typhoons, the stability of the foundation rubble when it rests stably on the seabed is mutually unstable. It is common knowledge that it depends on the frictional force and own weight of
Therefore, it is difficult to properly arrange the various stones that make up the foundation embankment, that is, those of various sizes, and to adjust the contact level of the concrete caissons that are installed on the foundation stones.

In order to withstand wave forces, these foundation stones are generally
Depending on the case, 1 to 2 TOH is used.

Moreover, it is safe to assume that these structures will be constructed like, for example, stone walls on land.

Therefore, although various types of large leveling machines have been devised up to now, it cannot be said that any of them have been put into practical use.

Therefore, the current situation is that the foundation stone embankment is still being constructed on the seabed using manual labor by divers and the use of crane ships.

To explain in detail one example of constructing a seawall in the ocean using the conventional construction method, first, an earth carrier is placed next to a crane ship,
Grab the construction stones from the earth carrier with a packet, and while measuring the depth of the water on the surface of the embankment on the seabed, place the stones at an appropriate location from above the water surface.

While repeating this work, the foundation stone embankment was roughly laid.

Next, the diver performs a process called ``remaining'' underwater, setting up leveled horizontal timbers on top of the rough finish, assembling the standing timber for the stand, and leveling the top by hand by the diver.

Carrying out these operations at a depth of 10 to 30 meters below sea level means that
There was a problem in that the seawater contamination caused poor visibility, making the work extremely difficult.

The present invention aims to propose a marine civil engineering construction vessel that eliminates such problems.The structure is such that it has bottom landing legs that can be raised and lowered, and can be anchored in a certain sea area by landing on the bottom. , a work conveyor whose base end is pivotably supported on the construction ship so that it can be elevated and rotated; an air chamber that can be filled with air, a working machine installed in the same air chamber, and a worker who can remain in the room and operate the working machine while visually observing the interior of the same air chamber, even if the worker is underwater near the air chamber. The present invention is a marine civil engineering vessel characterized by having an operation room equipped with an air chamber, which is equipped with an air chamber balanced with the water pressure, in order to always be able to visually see the disposal work on the seabed. In addition to installing the equipment on the seabed and repairing the work equipment therein, these devices will be installed at the tip of the conveyor that reaches the bottom of the sea from the barge, and a pressure-resistant operation room will be located close to the various devices. A control console for work equipment, conveyor equipment, etc. is installed inside the machine, and an operator enters and operates the machine.

Needless to say, normal-pressure air is fed into this control room, and the operators work on stacking and leveling the stones in the same conditions as on the ground, while visually observing through the air chamber, very efficiently and safely. , and can be done under good visibility.

Moreover, there is no need for a large pressure-resistant and heavy shell,
To provide a marine civil engineering vessel having the performance of an extremely compact and inexpensive submarine working machine.

Another feature of the present invention is that this offshore civil engineering vessel uses a crane ship to grab stones in batches to remove stones, etc. from the earth-carrying vessel, in order to efficiently carry out the construction of huge volumes of waste stones. We have a system that continuously transfers the handling from the packets of the packet barge to the marine civil engineering vessel using the ship's conveyor. It has many functions in the sea, on land, and for filling sand and gravel in caissons, etc., and at the same time, it can be used for mooring other ships by utilizing the strong mooring capacity of the marine civil engineering vessel. It has advantages.

Next, one embodiment of the present invention will be described with reference to the drawings.

Figures 1 and 2 show a marine civil engineering vessel (hereinafter referred to as the main vessel).
4 and a packet barge (hereinafter referred to as "barge") 1 that supplies sand, gravel, stones, etc.

A barge 1 has a large number of packets 2 installed on both sides of the deck, and a discharge conveyor 3 provided at the center of the deck.

The side of the packet 2 is lifted up by the hydraulic cylinder 2', and the load inside the packet 2 is transferred to the discharge conveyor 3 in the center.
Discharge to the ship side.

The ship 4 is provided with a receiving conveyor 5 for receiving cargo discharged by a discharge conveyor 3 from a barge 1 attached to the back of the ship 4.

A truck 18 that moves forward and backward is installed below the receiving conveyor 5 to which a rotating part 6 that can freely swing in the horizontal direction is fixed to one end of the work conveyor 7.

Therefore, the work conveyor 7 can be moved on the cart 18 and can also swing.

Further, the central part of the work conveyor 7 is suspended on the trolley 18 by a wire 9, and the mounting angle can be moved up and down using a hoisting machine 8.

A link mechanism forming a parallelogram is provided at one end of the work conveyor 7, and a supporting frame 10 is provided at the other end of the link mechanism to maintain a nearly horizontal state regardless of the elevation angle of the work conveyor 7. and an operation chamber 11 is provided above it.

The operation room 11 has a structure that can withstand water pressure, and is provided with air required by the operation tools and an operation console necessary for operation.

An operation window 11' is provided in front of it.

Further, below the support frame 10, a hydraulic excavator, which is a type of land-based construction machine, is provided.

However, it is clear in the configuration of the diagram that the forks 13, 14 of this excavator can also grip rocks when activated at the same time.

Also, if operated with the fork 13, it can be used like a shovel on an excavator.

The working machine 12 and forks 13 and 14 can be remotely controlled, and an air chamber cover 15 made of flexible airtight cloth and a wire net 17 are attached to one end of the support frame and a movable arm 16 that is rotatable. The bottom end is fixed.

The other end is fixed to a wall 19 fixed in front of the operation room 11.

The upper part of the wall 19 is connected to an air pipe 20, and during work, air is sent into the air cover 15 to remove water and enable visual inspection of the working area.

An illumination light (not shown) is installed in the vicinity.

Furthermore, a hood 11'' communicating with the operation window 11' is also provided.

With this configuration, the operating machine 12 and the upper surface of the seabed can always be clearly seen from the operating room 11, regardless of the state of the seawater flow or water depth and external light.

Therefore, it is possible to constantly observe the leveling condition of the stones supplied from the work conveyor 7 and the foundation stones on the seabed.

The vessel 4 is also provided with two spuds 20' to maintain stability during operation.

The number of spuds 20' can be increased to four depending on the sea conditions in the operating area.

Additionally, the ship 4 may further be provided with four known anchors, which can be operated by a windlass.

Next, we will explain the procedure for constructing a foundation stone embankment on the seabed.

Figures 3 and 4 show the outline of throwing stones.

The work conveyor 7 is swung left and right as shown by arrows A and A' in FIG. 3, and at the same time is sequentially retreated.

In this case, the arm of the air cover 15 may be raised if necessary.

This is because there is a risk that some of the stones will hit the lower arm and cause damage.

Next, lower the lower arm 16 as shown in FIGS. 5 and 6,
The level created by the lower end of the arm 16 is set as a reference, and the top of the reference ball 100 is used as a reference, and h is measured from the ship and defined as h.The height of the water surface can be determined by taking into account the ebb and flow of the tide.

These methods are known.

Therefore, it is obvious that the seabed standard is created from the water depths H and h and the angle θ of the work conveyor.

Corrections to θ during work can be easily communicated to the underwater operator from onboard the ship.

In such a relationship, the operator operates the working machine 12 and performs operations such as leveling with the fork 13 and, in some cases, removing part of the large stone in conjunction with the fork 14.

In some cases, it is also possible to level small stones and make them flat.

As explained in the structure, these operations can be performed while the operator visually observes the operating conditions inside the air cover.

These series of work ranges are determined by the stroke circle of the cart 18 of the work conveyor 7.

When the work in that range is completed, the spud 20' is pulled out and the vessel is moved to the purge side by the stroke of the truck 18 using the supporting force of the anchor, and the spud 20' is driven in again and the above-mentioned work is repeated.

Next, a caisson is installed by a known method on top of the foundation stones constructed as described above, and the inside of the caisson can be rapidly filled with sand, gravel, etc. from the packet purge 1 via the ship.

Once the caissons have been installed, it is necessary to install large stones on the slope of the basic stone embankment facing the open sea (referred to as the slope).

The operation in this case is shown in FIGS. 7 and 8 as an example in which the caisson 25 is filled with earth and sand and its base is hardened with throw stones.

In particular, FIG. 8 shows how large stones conveyed via the work conveyor 7 are successively arranged by forks 13 and 14.

Once these works are completed, the top coat of concrete for the revetment will be applied and the revetment work can be considered complete.

After that, the vessel can be moored near the seawall and used as a mooring device for purge and as a conveyor for dumping industrial waste for landfill inside the seawall, as shown in Figure 9.

The final treatment of industrial waste is by landfilling using the sea surface, but it is desirable to dump it in a completely closed seawall for use as a sea surface landfill, so a completely partitioned seawall is used. Dumping into the interior must be done only from the open sea side, and due to this necessity, the combination of the main vessel and purge is
In this sense, it is clear from the above explanation that a very desirable operation is performed.

[Brief explanation of drawings]

Fig. 1 is a plan view of one embodiment of the present invention, Fig. 2 is a side view thereof, Figs. 3 to 8 are explanatory diagrams of the usage situation of the above embodiment, and Fig. 3 is a plan view of the outline of the sacrificial stone. Fig. 4 is a side view, Fig. 5 is a plan view of the procedure for leveling discarded stones,
Figure 6 is a side view of the same, Figures 7 and 8 are side sectional views showing step-by-step how to fill the caisson with earth and sand and use it as a seawall, and solidify its base with rubble. The figure is a side sectional view of an example of dumping industrial waste that is useful for landfill. 4... Main ship, 6... Turning section, 7...
...Work conveyor, 8...Hoisting machine, 9...
...Wire, 10...Support stand, 11...
...Operation room, 12... Work equipment, 13゜14.
...Fork, 15...Air chamber cover,
16...Movable arm, 17...Wire net, 19...Wall body, 20...Air tube, 20'...Spud.

Claims (1)

[Scope of utility model registration request] A construction ship has a bottom landing leg that can be raised and lowered and can be anchored in a certain sea area by landing on the bottom, a work conveyor whose base end is pivoted to the ship to be able to lift and turn, and a work conveyor that is attached to the tip of the work conveyor. An air chamber is provided, the lower part of which is open to the outside, the upper part and surroundings are enclosed in an airtight manner, and which can be filled with water, a working machine installed in the same air chamber, and an underwater chamber near the air chamber. 1. A marine civil engineering work vessel, characterized in that it is provided with an operation room provided so that a worker can operate the working equipment while visually observing the interior of the same air chamber while entering the vessel.