JPS6347845B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention forms a drainage channel on the surface of muddy material such as dredged sludge in a landfill, for example, and allows water in the muddy material to flow into the drainage channel. In the so-called trench method, a construction method in which water is extracted from the muddy material by natural drainage or pump drainage, etc., a drainage channel is formed on the surface of the muddy material as the water is moved along the surface of the muddy material. Regarding floats used for

First, I will explain the principle of the mud dewatering method mentioned above.
When a drainage channel is formed on the surface of the muddy material, the water contained in the surrounding muddy material flows toward the drainage channel,
As dehydration occurs due to the inflow of this contained water, cracks occur on the surface of the mud around the drainage channel, and these cracks play the same role as the drainage channel, increasing the amount of drainage into the drainage channel and expanding the surface area of the mud. Combined with an increase in the amount of water evaporation caused by However, there was a drawback that the formation of drainage channels required a large amount of construction time, labor, and expense.

In other words, conventionally, in order to form drainage channels with appropriate spacing and arrangement in muddy materials over a wide area, as shown in FIG. Work vehicle 2
It is common practice to construct temporary roads 23 at appropriate intervals for the excavation work vehicle 22 to travel on, commensurate with the scope of work in step 2 and the location where the drainage channels 11 are required. , as the area of the muddy material 8 increases, the total length of the temporary road 23 increases;
It took an extremely long time, labor, and expense to create the temporary road 23, which led to an increase in the construction period, labor, and expense for forming the drainage channel.

In view of the above-mentioned circumstances, the present invention has been developed to create a muddy drainage system that can reliably and stably form a drainage channel as wide as possible and as deep as possible on the surface of a muddy material over a wide area without requiring the construction of a temporary road as described above. The purpose is to provide a float for the material dewatering method.

The characteristic structure of the float for the mud dewatering method according to the present invention, which was developed to achieve the above object, is that it has a relatively wide flat bottom and sloped side surfaces upward and outward from both left and right sides of the flat bottom. Wing-shaped bodies that generate buoyancy by contact with the surface of the muddy object during drive movement along the muddy object are attached to the left and right inclined side surfaces of the float main body that is connected in series and is capable of settling under its own weight against the muddy object. At the same time, the float body is equipped with a rotary trench excavator that protrudes below the bottom surface of the flat, and the muddy material dug up by the trench excavator is removed laterally and outwardly of the float body. The present invention has the following advantages in that it is provided with a lifting tube for lifting and discharging mud.

In other words, for example, a self-propelled vehicle with a winch is placed on both sides of a landfill, and appropriate rope such as wire is led out from the winch and connected to the float on the muddy material, and the float is pulled by the winch. At the same time, by moving the self-propelled vehicle in sequence and moving the float at appropriate intervals on the surface of the muddy material, drainage channels are formed in an appropriate arrangement and pattern on the surface of the muddy material. The scope of work for road formation is extremely wide, and special civil engineering work is required to form drainage channels for dewatering muddy materials over vast areas such as reclaimed land, including the creation of the temporary roads mentioned above. Not only can this be carried out in a labor-saving and efficient manner, but also the sliding movement of the wide flat bottom surface and the left and right wing bodies while in contact with the muddy material allows the entire float to be moved without or with very little rolling. While running in a stable manner, it is possible to reliably and powerfully dig trenches, regardless of the properties of the mud, such as moisture content and viscosity, using a rotary trencher that protrudes below the bottom of the flat. ,
As a result, the muddy material dug up is lifted and discharged through the mud lifting cylinder to a position on the lateral side that is sufficiently far away from the discharge path, and together with the shaping action of the float body, the muddy material is removed. It is possible to suppress as much as possible the reduction in the substantial depth of the discharge channel and the reduction in the substantial width of the drainage channel due to the return flow into the discharge channel. In addition, the anti-sludge reaction force accompanying the trenching action of the rotary trencher can be used for the propulsion force of the float, and the power required for moving the float can be reduced. As a result of the above, it is possible to reliably and stably form a drainage channel that is sufficiently wide and as deep as possible on the surface of the muddy material by one float movement as a whole. It has become possible to dewater water in a short period of time and with less labor and expense.

Next, examples will be shown.

As shown in Figures 1 and 2, an outer dam 1 surrounding the reclaimed land is constructed, an inner dam 2 is constructed to appropriately divide the reclaimed land, and sludge in the water is removed by a dredger 3 and a pipeline 4. Ultra-soft muddy materials such as dams 1 and 2 are thrown into a dumping ground 5 surrounded by dams 1 and 2.

Then, a self-propelled vehicle 7 equipped with a winch 6 is placed on each of the dams 1 and 2 on both sides of the soil dumping site 5, a float 9 is floated on the muddy material 8, and both winches 6 are connected to the float 9 with a rigging 10 such as a wire. connected to both winches 6
While pulling the floats 9 alternately, the self-propelled vehicles 7 are moved a suitable distance along the dams 1 and 2, and a large number of drainage channels 11 are formed on the surface of the muddy material 8 in a parallel, zigzag, or Formed in an appropriate arrangement and spacing, such as in a grid pattern.

In addition, by using an appropriate excavation vehicle 12 such as a crane truck with a clam shell or a backhoe vehicle, the drainage channel 13 is constructed around the entire circumference of the dams 1 and 2 at the same time or after the drainage channel is formed by the float 9. The drainage channels 11 and 13 are all connected to each other.

After that, for an appropriate number of days, such as about 50 days,
The water in the muddy material 8 is made to flow into the drainage channels 11 and 13, and the water in the drainage channels 11 and 13 is taken out by the drainage equipment 14 to dehydrate the muddy material 8.

Furthermore, if necessary, the process of increasing the depth of the drainage channels 11 and 13 and dewatering them using the float 9 and the excavation vehicle 12 is performed once or multiple times in the same manner as described above. Once the surface has hardened appropriately, the depth of the drainage channels 11 and 13 is increased using an excavation vehicle that runs over the muddy material 8, and the same dewatering process is carried out once or multiple times. The dehydration treatment of the material 8 is completed.

The float 9 used in carrying out the above-described dewatering method is constructed as shown in FIGS. 3 to 5.

A suitable heavy object 15 such as sand is placed on the top surface of the internal space 16.
It has an opening with a lid 16b so that it can be taken in and out of the container a, and the bottom surface 6A is formed as a relatively wide flat surface, and the flat bottom surface 6A has sloped side surfaces upwardly and outwardly from the left and right sides of the flat bottom surface 6A. 1
Both inclined side surfaces 16B, 16B of a float body having a flat-bottom boat shape as a whole, in which 6B, 16B are formed in series.
In order to attach a pair of left and right wing-like bodies 17a and 17b to the towing rope, and to attach the connectors 10A to the towing rope 10 at the front and rear ends, respectively, and to have a worker on board to manage the dehydration state, etc. A frame 21 having a handrail 21a and a scaffold board 21b is attached so that the float body 16 sinks under its own weight against the muddy material 8, and the wing-like bodies 17a,
The structure is such that the weight of the heavy object 15 in the float body 16 can be appropriately changed and set so that the float body 16 is prevented from sinking by the buoyant force generated by the contact between the float body 17b and the muddy material 8. Furthermore, a rotary groove excavator 19 is installed at a position near the front of the float main body 16 so as to protrude below the flat bottom surface 16A. This ditch digger 19
is a left-right reverse direction driven and rotated by a motor 21,
In other words, the spiral screw pair 19A, 19B moves the mud from the center in the width direction of the float body 16 toward the left and right sides, the semi-cylindrical mud guide cover 19B with a downward opening, and the mud guide cover 19B moves the mud toward the left and right sides. Feather 1 that flips the muddy material upward
Consisting of 9C and 19C, screw pair 19A,
The drainage channels 11 and 13 are formed by digging grooves as the muddy material 19A is moved to both the left and right sides. In addition, the muddy material dug up by the trench excavator 19 and moved to the left and right sides is lifted and guided to the lateral outer side of the float body 16, and the muddy material is removed from the drains 11 and 13. A pair of left and right mud lifting cylinders 20, 20 for discharging onto the object 8 is provided in a state where it is fixedly supported by the float main body 16. These mud lifting tubes 20, 20 are connected to the blade 1.
It may be one that directly guides the mud thrown up by 9C and 19C, or it may be one that is equipped with a screw inside.

Next, another example will be shown.

The sludge 8 to be treated is mainly sludge dredged from ports and rivers and ultra-soft sedimentary soil, but various types can be selected, such as sludge from wetlands or ultra-soft ground. is mainly a landfill site,
For example, it may be anywhere, such as a wetland, extremely soft ground, or a sludge dewatering treatment plant.

Moreover, in order to move the float 9 on the muddy material 8, for example, the winch 6 is manually operated to move the float 9 on the dam 1,
2, or by providing the float 9 with a remote-controlled dirt-scraping propulsion device to make the float 9 self-propelled, various other means can be used. That's fine.

[Brief explanation of drawings]

Figure 1 is a schematic plan view of the processing site, Figure 2 is a schematic longitudinal sectional view of the treatment site, Figure 3 is a plan view of the float, Figure 4 is a side view of the float, and Figure 5 is the line shown in Figure 4. The sectional view, FIG. 6, is a schematic vertical sectional view of a conventional processing site. 8...Mud, 16...Float body, 11...
...Drainage channel, 16A...Flat bottom, 16B...
Inclined side surface, 17a, 17b... Wing-shaped body, 19...
Ditch excavator, 20... mud pump.

Claims (1)

[Claims] 1. A relatively wide flat bottom surface 16A and sloped side surfaces 16B, 16B are connected upwardly and outwardly from the left and right sides of the flat bottom surface 16A, respectively, and the float body 16 is capable of settling under its own weight against the muddy material 8.
Wing-like bodies 17a and 17b are attached to the left and right inclined side surfaces 16B and 16B of the float body 16, and wing-like bodies 17a and 17b that generate buoyancy by contact with the surface of the muddy material 8 during drive movement along the muddy material 8 are attached to the float body 16. ,
A rotary trench excavator 19 is installed in a position protruding below the flat bottom surface 16A, and the muddy material dug up by the trench excavator 19 is lifted and discharged laterally outwardly of the float body 16. Lifting cylinder 20, 20
Float for mud dewatering method.