JPH04128423A - Reclamation work vessel - Google Patents

Abstract

PURPOSE:To prevent pollution of the sea water, and shorten a construction period by providing a sediment receiving hopper, a binding material storage tank, a kneading device or the like on a hull, and filling the kneaded sediment into the sea bottom with a screw feeder which can be elevated freely. CONSTITUTION:A sediment receiving hopper 2, a storage tank 3 of the binding material such as cement or the like, an admixture storage tank 4, a kneading device 5, belt conveyors 9a, 9b, winches 11, 16 or the like are provided on a board 1. An earth filling pipe 10 comprising a screw feeder inside thereof is hanged down by the winch 11 freely to be elevated, and while the sediment kneaded on the board 1 is filled by the screw feeder 10. Earth filling work is thereby performed continuously, and while pollution of the sea water is prevented.

Description

[Detailed description of the invention] [Description of the field to which the invention pertains]

The present invention is a device for performing marine reclamation work, in which the soil is improved in advance by kneading the earth and sand with a binding material on a work boat. This relates to a work boat that efficiently deposits earth and sand on the ocean floor to suppress seawater pollution and perform land reclamation efficiently. [Prior art and its problems] In recent years, large-scale reclamation works for artificial islands, sea airports, etc. have been increasing. In the case of small-scale reclamation work, a method is used in which the seabed sediment around the reclaimed area is dredged using a pump dredger and then pumped to fill it. However, in large-scale reclamation work, it is difficult to secure seabed sediment. A construction method is used in which earth and sand cut from the mountain are loaded onto an acid volume transporter, which is then towed to the reclaimed area and placed there. However, according to this conventional law 1', uneven settling of the sand on top of the landfill, liquefaction of the ground during earthquakes, and settling due to swaying are likely to occur, and in order to prevent this, it is necessary to improve the ground after the landfill. However, the drawback is that construction takes a long time and costs are high. Moreover, the ground improvement often involves only partial improvement, and it cannot be said that the ground will be stable. In addition, the second method using wide-open earth transport vessels has the disadvantage that a large amount of seawater pollution occurs because the earth and sand fall from the sea surface to the seabed. Furthermore, the wide-open earth carrier has the disadvantage that it is impossible to reclaim land above sea level, and other construction methods (such as land transport using dump trucks) must be used for land above sea level.

[Failure to solve the problem]

The present invention was made to solve the following two problems, and its purpose is to improve the soil in advance by kneading the earth and sand with a binding material on board the ship. ,
To provide a work boat that can reduce seawater pollution to a level 1, perform reclamation work at sea level -L, and perform reclamation work in a short construction period and at low cost. Hereinafter, the present invention will be explained in detail based on the drawings. FIG. 1 is a diagram showing the basic concept of the present invention. The hull 1 is equipped with an earth and sand receiving hopper 2, a binder storage tank 3, an admixture storage tank 4, and a mixing device 5 for mixing earth and sand with the binder and the admixture. Receiving hopper 2
The raw material drawn out from each storage tank;
It is designed to be supplied to Further, the earth and sand mixed with the binder and the admixture in the mixing device 5 are transported to the landfill pipe 10 by the conveying device 9. The landfill pipe 1
0 can be raised and lowered from the sea surface 2 to the seabed 3 using a lifting device 11, and when reclamation is performed, the lower end of the reclamation pipe 10 is lowered to the seabed 13, and earth and sand is deposited from the seabed 13 position to perform the reclamation work. I try to do it. [Example] An example of the present invention will be described with reference to the drawings. FIG. 2 is a top view of the reclamation work vessel according to the present invention, and FIG. 3 is a side view of the reclamation work ship. Receiving hopper 2 for earth and sand used for reclamation, storage tank 3 for cement as a binder, storage tank 4 for admixtures; rotating drum with spiral blades on the cylindrical inner surface as a mixing device for earth and sand, cement, and admixtures; The continuous wire mixers 5, which are designed to perform continuous kneading, are appropriately arranged on the deck of the hull 1 and fixed to each of them. As a reclamation pipe for earth and sand, the lower end is open and there are multiple input ports 10 on the side so that earth and sand can be input at will according to the reclamation depth.
A screw blade is arranged inside a hollow cylindrical pipe having a shape, and a drive motor 10b is attached to the upper end of the pipe.
A screw feeder 10 configured to rotate screw blades to propel earth and sand in a pipe downward.
is the jib 1 whose end is supported and fixed on the deck of the hull 1.
4, it is suspended via a wire lobe 15 by an elevating winch 11 fixed on the deck of the hull 1 as an elevating device, and by operating the elevating winch 11, it can be raised and lowered from above the sea surface 12 to the seabed ] 3. and can be moved to any position. The belt conveyors 6a and 6b are connected from the earth and sand reception hopper 2 to the input 1':1511 of the mixer 5, and the earth and sand are quantitatively supplied to the mixer 5 depending on the opening degree of the gate 2a attached to the lower part of the reception hopper 2. I'm trying to do that. The screw conveyor 7 is connected from the cement storage tank 3 to the input port 5a of the mixer 5, and furthermore, the screw conveyor 8 is connected from the admixture storage tank 4 to the middle of the screw conveyor 7, and mixes cement and admixtures. are mixed and quantitatively supplied to the mixer 5. bell 1
The conveyors 9a, 9b, 9C are supplied with the screw feeder 10 from the discharge chute 5b attached to the lower part of the mixer 5.1. The screw feeder 10 is connected to the screw feeder 10 so that the earth and sand mixed with the cement and the admixture by the mixer 5 is conveyed to the screw feeder 10. Further, the bell)-conveyor 9b is a frame As 9 x
The end of the frame 9X is supported by a pin on the deck of the hull 1, and the vicinity of the tip of the frame 9X is supported via a wire lobe 17 by a hoisting winch 16 fixed to the jib 14. It is provided on rails 9 y and h attached to the lower part, and is movable in parallel to the belt conveyor 9b. By operating the undulating winch 16 and moving the belt conveyor 9C, adjustment is possible so that the tip of the belt conveyor 9C and the input port 1.0a of the screw feeder 10 are aligned. Note that 18 is a guide for preventing the screw feeder 10 from swinging, 19 is a control room for remotely operating each device, and is a generator for supplying 20 liters of electric power. According to this embodiment, two mixers 5 are provided, and the earth and sand mixed with cement and admixture are fed to one screw feeder 1.
In this embodiment, a plurality of screw feeders 10 may be used to distribute the earth and sand mixed with cement and admixture to perform the reclamation work. Further, although the continuous wire mixer 5 is used as a mixing device for the earth and sand, the cement 1 to 1 and the admixture, it is also possible to use a forced mixing mixer having rotating blades inside. In addition, as a means for measuring the earth and sand, we used a fixed-view transport screw conveyor as a means for quantitatively supplying the earth and sand according to the gap between the receiving hopper and as a means for measuring the admixture into the cement 1.
It is also possible to provide a measuring device for measuring the weight of each material. In addition, the screw feeder 10 was used as a landfill pipe for earth and sand, but the lower end was open and it was fed into the side.

It can also be made into a hollow cylindrical pipe with [E]. Further, instead of the screw feeder]-o, it is also possible to use the present invention as a packet elevator to receive the reclaimed soil into packets and perform the reclaiming work by lowering the packets, which constitutes another embodiment of the present invention. [Function] Next, the function of the landfill work boat of the present invention having the above configuration will be described in detail. The reclamation work boat of the present invention is towed to a reclamation area and moored. The screw feeder 10 is lowered by operating the lifting winch 11 so that the lower end of the screw feeder 10 is located on the seabed 13. Then, the undulation angle of the belt conveyor 9b is adjusted by operating the undulation winch 16, and the belt conveyor 9c is moved to
The position is such that earth and sand fall from the tip of the screw feeder to the input port 10a of the screw feeder. Another soil transport ship is brought alongside the reclamation work boat of the present invention, and at the same time, earth and sand are received from the soil transport ship into the receiving hopper 2 using a Taramsiel, etc., and each belt conveyor 6a, 6b, 9a, 9b, 9c
By starting the operation of the screw conveyor 7.8 and the mixer 5, the earth and sand are quantitatively supplied to the mixer 5, and the cement is also quantitatively supplied to the mixer 5 while being mixed with the admixture on the screw conveyor 7. The mixture is then kneaded continuously in the mixer 5. Furthermore, the reclaimed soil that has been improved in advance in the mixer is transported from the discharge chute 5b to the bell 1 to the conveyors 9a, 9b, 9c.
It will be sent from input 1-11.0 a to screw feeder ]O via . Then, the reclaimed soil is propelled downward by the screw blades in the screw feeder 10, deposited on the seabed, and is continuously reclaimed. [Effect of the invention 1] According to the reclamation work boat of the present invention, the soil is improved by kneading the earth and sand with a binding material and an admixture. The conventional ground improvement after reclamation] can eliminate the need for two vehicles. Moreover, since the vehicle weight is mixed with a binder and an admixture, it is forcibly mixed with soil and sand in a mixer, making it possible to produce stable soil with less variation in strength. Furthermore, by changing the amounts of binders and admixtures, it is possible to arbitrarily adjust the strength of the reclaimed soil according to the construction in the buried q±-.
Becomes Noh. Furthermore, by using a continuous mixer,
Landfill work can be performed continuously and evenly. In addition, a screw feeder is used as the landfill pipe, and the lower end of the landfill pipe is located on the seabed, and the reclaimed soil is gradually moved from the ship and falls into the sea near the seabed, so there is no contamination of seawater. It can solve the problem of ocean pollution. Furthermore, by setting the position of the landfill pipe, the thickness of the landfill can be adjusted as desired. Moreover, by raising the reclaimed pipe above the sea level, it is now possible to perform land reclamation on the sea surface, which was impossible with earth transport ships. There is no need to make any changes, and the reclamation work vessel of the present invention can perform reclamation work from the seabed to above the sea surface. Furthermore, by using a plurality of landfill pipes, the landfill area can be expanded and a more uniform landfill surface can be formed. The present invention is an extremely excellent landfill work boat having the above-mentioned effects and advantages.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the basic concept of the present invention, and FIGS. 2 and 3 are a plan view and a side view of one embodiment of the present invention. 1 ... Hull 2 ... Sediment reception hopper 3 ... Binding material (cement) storage tank 4 ...
...Admixture storage tank 5 ...Kneading device (mixer)

Claims (3)

[Claims] (1) Equipped with an earth and sand receiving hopper, a binder storage tank, a kneading device for mixing the earth and sand with the binder, and a means for enclosing the earth and sand when transporting the earth and sand mixed by the kneading device from the ship to the seabed. , a landfill comprising a metering means for making the above-mentioned soil and binder into a predetermined mixing ratio, a supply device for supplying each material to the kneading device, and a conveying device for transporting the kneaded soil from the kneading device to the enclosure means. work boat. (2) The reclamation according to claim 1, characterized in that a screw feeder is used as the enclosing means, in which screw blades are arranged in the pipe, and earth and sand are propelled by rotating the screw blades. work boat. (3) The landfill work boat according to claim 1, characterized in that the measuring means is a conveyance means whose conveyance amount per hour is constant.