JPS6347844B2 - - 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 the water inside is taken out by natural drainage or pump drainage, etc. to dehydrate the muddy material, a drainage channel is formed on the muddy surface as the drive moves along the muddy surface. 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 vehicle 22 to travel on, commensurate with the scope of work in step 2 and the location where the drainage channel 11 is 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 construct 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 first invention provides a muddy material capable of stably forming a sufficiently wide drainage channel on the surface of the muddy material over a wide area without requiring the construction of a temporary road as described above. The purpose is to provide floats for dewatering methods.

The characteristic structure of the float for the mud dewatering method according to the first invention, which was developed to achieve the above object, is that the float has a relatively wide flat bottom surface and a float connected upwardly and outwardly from both left and right sides of the flat bottom surface. The present invention is characterized in that wing-shaped bodies that generate buoyancy by contact with mud are attached to the left and right tilted sides of the float main body, which has sloped sides and can sink under its own weight against mud. The effects of the present invention having the characteristic configurations are as follows.

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. This allows for stable running and a uniform wake, in other words, the formation of a drainage channel that is sufficiently wide and well-shaped over its entire length. As a result of the above, it has become possible to efficiently dewater a large amount of mud in a short construction period and with less labor and expense.

Further, the object of the second invention is to use the float of the first invention to form a drainage channel as deep as possible regardless of the properties of the mud, especially the degree of softness, thereby improving the dewatering efficiency. The goal is to improve the float so that the power required to move the float can be reduced as much as possible.

The characteristic structure of the float for the mud dewatering method according to the second invention, which has been improved to achieve the above object, is as follows:
The float body has a relatively wide flat bottom surface and sloped side surfaces connected upwardly and outwardly from the left and right sides of the flat bottom surface, and the left and right sloped side surfaces of the float body are capable of settling under their own weight against muddy objects, The wing-shaped body that generates buoyancy when it comes into contact with mud is attached so that its vertical position can be changed and fixed, and the effects of the second invention having such a characteristic configuration are as follows.

In other words, the upper limit depth of the drainage channel formed on the surface of the muddy material is automatically determined by the properties of the muddy material, such as water content and viscosity. If this were to happen, the actual depth of the drainage channel would likely become shallower than the upper limit depth due to the return flow of mud after the float body had passed, and a large amount of power would be required to move the float. That's what I do. Therefore, in order to maximize the depth of the drainage channel and minimize the power required to move the float, it is desirable to set the settling depth of the float body appropriately according to the properties of the muddy material. This requirement can be fully satisfied by setting the vertical position of the wing-shaped body relative to the float body, and it has become possible to form a drainage channel with good dewatering efficiency and always in a state of good power efficiency.

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 rope 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, an appropriate excavation vehicle 12 such as a crane vehicle with a clamshell or a backhoe vehicle is used to construct a drainage channel 13 along 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 excavation vehicle 12 is performed once or multiple times in the same manner as described above, and the sludge 8 Once the surface has hardened appropriately, the depth of the drainage channels 11 and 13 is increased and the dewatering process is carried out one or more times using an excavation vehicle that runs over the muddy material 8, and then the muddy material is removed. Thing 8
Complete the dehydration process.

The float 9 used in carrying out the above 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 16A is formed as a relatively wide flat surface.
Both inclined side surfaces 16B, 1 of a float main body having a flat-bottom boat shape as a whole have inclined side surfaces 16B, 16B connected upwardly and outwardly from both left and right sides of A.
A pair of left and right wing-shaped bodies 17A, 17b are attached to the 6B with brackets 18 and pins 19 so that their vertical positions can be changed and fixed, and the connectors 20 for the traction rope 10 are attached to the front and rear ends respectively, and the dewatering condition etc. In order to carry a worker on board for the purpose of managing
so that it settles under its own weight against the muddy material 8, and
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 wing-like bodies 17a and 17b and the muddy material 8. , wing 1
It is configured such that the sinking depth of the float body 16 can be changed and set by adjusting the vertical positions of 7a and 17b.

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.

As shown in FIG. 6, the float 9 used in the first invention includes a fixed type in which the wing-shaped bodies 17a and 17b cannot be moved up and down, and the structure of the float 9 and the structure for forming the drainage channel 11 can be changed freely, for example, the excavating parts such as blades or a driving excavator can be attached to the float body, preferably by changing the vertical position.
It is possible to attach it etc.

In forming the float 9 according to the second invention, various changes can be made in the specific configuration, such as attaching the wing-like bodies 17a and 17b to the float body 16 by means of attaching parts whose vertical positions can be continuously changed.

In the first invention and the second invention, the float 9
For example, a winch 6 is used to move the
Various other means can be used, such as manually moving the float along the dams 1 and 2, or equipping the float 9 with a remote-controlled mud scraping propulsion device to make the float 9 self-propelled. It may be moved by an appropriate drive device 6.

Various means can be used to form the drainage channels 13 along the dams 1 and 2, such as floats 9, various excavation devices, and sometimes manual labor.
To take water out of the tank 13, a natural runoff method or various forced drainage methods can be used, and if evaporation is significant, a natural evaporation method may be used.

[Brief explanation of the drawing]

Figure 1 is a schematic plan view of the sludge dewatering treatment site, Figure 2 is a schematic longitudinal sectional view of the sludge dewatering treatment site, and Figure 3
The figure is a plan view of the float, FIG. 4 is a side view of the float, and FIG. 5 is a sectional view taken along the line -- in FIG. 4. FIG. 6 is a longitudinal sectional view of another embodiment, and FIG. 7 is a schematic longitudinal sectional view of a conventional sludge dewatering treatment site. 8...Mud, 9...Float, 11...Drainage channel, 16...Float body, 16A...Flat bottom surface, 16B...Slanted side surface, 17a, 17b...
Pterygium.

Claims (1)

[Scope of Claims] 1. A float for a mud dewatering method that forms a drainage channel 11 on the surface of the mud 8 as it moves along the surface of the mud 8, and has a relatively wide flat bottom surface. 16A and the inclined side surfaces 16 connected upwardly and outwardly from the left and right sides of the flat bottom surface 16A.
The left and right inclined side surfaces 16 of the float main body 16 have B, 16B and can sink under their own weight against muddy objects.
A float for a mud dewatering method in which wing-shaped bodies 17a and 17b that generate buoyancy by contact with mud 8 are attached to B and 16B. 2 A float for a mud dewatering method that forms a drainage channel 11 on the surface of the mud 8 as it moves along the surface of the mud 8, and has a relatively wide flat bottom surface 16A and its flat bottom surface 16A. Inclined side surfaces 16 connected upwardly and outwardly from both left and right sides of the
B, 16B, and the left and right inclined side surfaces 16B of the float body 16, which can sink under its own weight against muddy objects,
A float for a mud dewatering method in which wing-like bodies 17a and 17b, which generate buoyancy by contact with mud 8, are attached to 16B so as to be able to change and fix their vertical positions.