KR101029978B1 - Dehydration apparatus having vacuum pressure function - Google Patents

Abstract

PURPOSE: A dehydration device capable of vacuum pressure function is provided to discharge pore water among dense soil particles by giving vacuum pressure to a block by using a vacuum pump. CONSTITUTION: A dehydration device capable of vacuum pressure function comprises a block(10), an absorber(20), a drain pipe(30), and a vacuum pressure device(40). The block is made of a metal material and has one or more discharge holes(11) on top. The discharge hole discharges the pore water, inhaled by vacuum pressure, and is connected to a hose(41). The absorber is fixed to the inside upper part of the block and absorbs the inhaled pore water. The drain pipe is installed within the block and has a plurality of through-holes(31) at an outer circumference. The vacuum pressure device inhales and discharges the pore water through the hose connected to the discharge hole formed in the upper side of block by giving vacuum pressure load to the inside of the block.

Description

Dehydration Apparatus having Vacuum Pressure Function

The present invention relates to a dewatering device having a vacuum pressure function, and more particularly to a device for dewatering and discharging the pore water contained in the soil by applying a vacuum pressure load to a block having an internal volume.

In general, clay, organic soil, calcined silt, etc. have a high water content (W = (water weight / soil weight) × 100%) in the natural state. The natural water content is determined by the soil engineering conditions and the minerals themselves. Particularly, Montmorillonite maintains a high water content without losing adhesion even at a water content of 500%.

When excavation or dredging projects are carried out as part of the national development, the process of securing a stable strata is carried out after moving clay layers of high water content generated by excavation or dredging to the soil.

The general water content ratio of the soft clay layer with a standard penetration test value (N) of about 0 to 2 is 50 to 60%. When excavation is carried out, the water content should be dehydrated to about 20% for transport to the soil. If the water content of clay or earth and sand is less than about 20%, even if it is loaded on a dump truck, it will be violated by the Road Traffic Act and will not be transported.

Clay produced by excavation or dredging is more disturbed than natural conditions, and when excavated or dredged with water, the weight ratio of water and soil reaches 1: 9. Even though such soil is accumulated, it is accumulated more than twice as much as the water content in the natural state, and thus it requires more dehydration process to move it to the soil.

There are two main ways to dehydrate high content clay. The first is the chemical method of coagulation and solidification using the ionic properties of clay materials. Solidifying agents include cement-based, lime-based, urethane-based, acrylamide-based, etc. In terms of economics, cement-based and lime-based systems are most commonly used. However, lime is most advantageous to rely on the hydraulic properties of the cement, because the improvement effect is reduced by slurrying. On the other hand, when the soft ground is viscous soil or contains organic components, the improvement effect is often not shown as a single cement product. Therefore, cement is used as the main material and additives to promote the improvement effect of cement are called cement soil stabilizers or hardeners.

The solidification method using cement slurry was developed in the 1960s and has expanded its construction area. Current cover, waterway structure, shore foundation, house foundation, combined with surface solidification, sheet construction, etc. for solidification of Hediro deposited on rivers, canals, and seabeds, and securing earthmoving equipment for dredging landfills. Although it is widely applied to the construction of residential land, there have been no cases of construction in Korea.

The second dewatering method involves physically draining water from high-content clay. This is a method of directly extracting the gap number between the particles by applying external force. It is a method of dehydrating the soil while improving the soil using the consolidation theory of soil mechanics. The physical method requires long consolidation time by installing vertical drainage and horizontal drainage layer in the high water content clay layer accumulated in the large dredged soil dump site and consolidating the ground through the embankment work on the upper part. It is a construction method used for the purpose of using as a housing and industrial complex.

Therefore, it is not suitable for the method of securing the runability of the equipment by transporting the excavated high moisture content clay within a short time to transport to the soil or to dehydrate only the surface layer within a short time.

In view of this situation, the vacuum preloading method has appeared. The vacuum consolidation method is one of the soft ground improvement methods. Sand sand, a horizontal drainage layer for drainage, is installed on the ground surface of the soft ground, and the ground is sealed by installing an airtight sheet so that vacuum pressure does not escape therefrom. Condensation is promoted by applying vacuum pressure to discharge water and air in the ground. This is also called atmospheric pressure method.

Install drainage of corrugated pipe in the ground for drainage in the vertical direction, make grid pipe network so that upper part of permeable vertical drain and pressurized hose are directly connected, and then operate pump to make the ground inside vacuum and make atmospheric pressure It is a method of acting the load on the surface and the ground.

In the conventional reworking method, the process of filling and loading soil is replaced by atmospheric pressure in the vacuum consolidation method, and the sand drain or board drain for drainage purposes is made of polyvinyl chloride (PVC) coated with a nonwoven fabric. It is replaced by a soft corrugated pipe.

If the upper soil is very fragile, consolidation can be rapidly accelerated without load loading and shear failure under atmospheric load. In addition, due to the atmospheric load, the amount of loading can be reduced to some extent.

Recently, with the development of vacuum membrane installation technology and powerful vacuum pump, construction technology has been developed and actively used in the United States and Europe, etc., and it has been used for improving soft ground in Korea.

As a conventional technique for improving the soft ground, the ground stabilization method by forced consolidation vacuum dehydration of the Republic of Korea Patent Publication No. 2002-24199 can cover the airtight sheet on the upper surface of the ground and drain the water forcibly to settle the ground in a short time It would be.

However, the prior art installs a plurality of vertical drains in the ground, crosses the horizontal drains on the vertical drains, covers the airtight sheet on the upper surface of the ground, and forcibly drains the water, but the vertical and horizontal drains and the airtight sheet are installed to stabilize the ground. Since a large amount of installation costs a lot of work, there was a problem that takes a relatively long time.

The present invention is to solve the above problems, to form a boundary having a constant binding force in a block of a predetermined shape having a vacuum pressure function, by applying a vacuum pressure load in the block using a vacuum pump to shorten the pore water in the high content ratio of the particles The purpose is to discharge and dewater the inside to make the soil without fluidity.

Therefore, the prior art is a soft ground consolidation treatment method for installing a flexible airtight sheet on the upper surface of the section for the soft ground treatment after installing the vertical drainage, while the present invention inserts a block of a certain shape and yells in the block It aims to perform dehydration on defensive soils.

The present invention is a double block formed integrally with the inner block and the outer block in order to achieve the above object, the inner block is formed in the inner block through a predetermined interval for suction of the pore water from the earth and sand, A block having a closed volume and an internal volume of a predetermined capacity in a polygonal or cylindrical shape; An absorbent material filled in the space formed between the inner and outer blocks of the block to absorb the sucked gap water; In order to shorten the discharge flow path of the gap water, a plurality of through holes are formed in the outer periphery and the drain pipes are formed of a plurality of metal pipes whose upper ends are fixedly coupled to the inner upper surface of the block, and at least one discharge hole formed on the upper surface of the block. It includes a vacuum pressurizing device for suctioning and discharging the gap water by forming a vacuum pressure inside the block through a connected hose, wherein the lower surface of the block and the drain pipe is made of a saw blade or wedge-shaped edge for penetration between the earth and sand; In addition, it is characterized in that the dewatering device having a vacuum pressure function for restraining the boundary portion so that the vacuum pressure is continuously maintained in the high moisture content of the soil that occupies a certain area.

In addition, the present invention further includes a moving device for moving a block to a sediment position for dewatering or separating a block intruding into the soil, and a penetration device for injecting the block into the soil.

The present invention can reduce the time for improvement of the soft ground and reduce the cost by dehydrating the high moisture content of the soil in a short time by the solution means to make a non-flowable soil, chemically treated using a solidifying agent It is harmless to the environment because secondary pollutants do not occur. It can dehydrate water of high content ratio dredging or excavated clay layer by vacuum pressurization and transport it stably to the soil site, thus preventing road pollution. In addition, it is difficult to access by using a mobile device such as a crane that can deform the surface of the construction road or the transport copper in a short time so that construction equipment can run within the super soft ground, and dehydrate the surface quickly. Dehydration of the high-concentration clay in the area can be easily performed, and the high-condensation-clay in the water also has the advantage of maximizing the dehydration efficiency because a larger load can be applied using vacuum and water pressure.

1 is a block diagram showing a first embodiment of a dewatering device having a vacuum pressure function according to the present invention.
Figure 2 is a block diagram showing a second embodiment of the dewatering device having a vacuum pressure function of the present invention.
Figure 3 is a block diagram showing a third embodiment of the dewatering device having a vacuum pressure function of the present invention.
Figure 4 is a block diagram showing a fourth embodiment of the dewatering device having a vacuum pressure function of the present invention.
5 is a configuration diagram showing a fifth embodiment of a dewatering device having a vacuum pressurizing function of the present invention.
6a to 6f are time-series diagrams showing the dehydration method of the high water content sediment using the dehydration apparatus having a vacuum pressure function of the present invention.

Hereinafter, a dehydration device having a vacuum pressure function according to the present invention will be described in detail with reference to the accompanying drawings.

The dewatering device having a vacuum pressurizing function of the present invention is provided with a block for constraining the boundary so that the vacuum pressure is continuously maintained in the soil of a high water content occupying a certain area, and a vacuum pressurizing device for applying a vacuum pressure load to the block 10 is installed. will be.

1 shows a cross section of a block 10 as a first embodiment of a dewatering device. Block 10 is the upper surface, left and right and front and rear surfaces are formed to be sealed. That is, only the bottom surface of the block 10 is open. The block 10 may be a polygonal pillar having a predetermined volume of internal volume, preferably a square pillar such as a box having a hexahedron, and may have a cylindrical shape. The block 10 is made of metal and has one or more discharge holes 11 formed thereon. The discharge hole 11 may discharge the gap water sucked by the vacuum pressure in the block 10, and a hose 41 is connected to the discharge hole 11. The vacuum pressure device 40 is connected to the hose 41.

Absorber 20 is fixed to the upper surface inside the block 10 to absorb and discharge the suctioned gap water. The absorber 20 includes a nonwoven fabric or a porous filter, but the absorber may be any material that can easily adsorb or absorb the pore water.

The drain pipe 30 is formed with a plurality of through holes 31 on the outer circumference, and the upper end is integrally fixed to the inner upper surface of the block 10 by welding or the like. The drain pipe 30 is provided in plurality in the block 10. The drain pipe 30 formed integrally with the block 10 has a porous metal in order to shorten a flow path, which is a discharge length of the pore water contained in the earth and sand inside the block 10, so that the dehydration can be performed within a short time. The pipe is installed. The drain pipe 30 may vary in arrangement and installation interval of the drain pipe 30 according to the type of soil, the viscosity, or the amount of pore water. The drain pipe 30 may be omitted, if necessary, such as the type of soil sand, the amount of viscous or pore water, or the size of the vacuum pressurizing device.

The vacuum pressurizing device 40 sucks and discharges the gap water by applying a vacuum pressure load to the inside of the block 10 through a hose 41 connected to one or more discharge holes 11 formed on the top surface of the block 10. The vacuum pressurizing device 40 includes a vacuum pump or a ventry pump. The vacuum pressurizing device 40 varies in size or number of uses depending on the internal volume of the block 10, the size of applying vacuum pressure, and the like.

FIG. 2 shows a second embodiment of the dewatering device, in which the lower surface of the block 10 and the lower surface of the drain pipe 30 have a block 10 with wedge or saw-shaped edges 16 and 32. It is for improving the penetration between the soil when it is pressed into the soil. That is, the lower surface of the block 10 and the drain pipe 30 is composed of sharp or pointed edges 16 and 32 so that the block and the drain pipe easily penetrate between the soil when the soil surface is rather hard. It is for.

3 is a third embodiment of the dewatering device, in which the block 10 is a double block, that is, the inner block 13 and the outer block 12 are integrally coupled with the space 14 therebetween. The absorbent material 20 is filled in the space 14 formed between the block 13 and the outer block 12. The inner block 13 and the outer block 12 may have a structure that can be separated and combined. And the inner block 13 has a through hole 15 is formed at a predetermined interval so that the gap water can be sucked from the soil. The drain pipe 30 may be fixedly coupled to the inner surface of the inner block 13 by welding or the like, or may be fixed to the inner surface of the outer block 12 by welding or the like by penetrating the inner block 13.

Meanwhile, in the fourth embodiment of FIG. 4, the hose 41 is connected to the discharge hole 11 of the block 10, and the vacuum pressure device 40 is connected to the end of the hose 41. This embodiment is an installation structure that allows a large amount of vacuum pressure is required or to suck and discharge the pore water from a relatively large range and a large amount of soil. This is to ensure that the vacuum pressurizing device 40 is fixedly installed at a certain distance and dewaters the soil while moving only the position of the block 10.

In the fifth embodiment of FIG. 5, the vacuum pressurizing device 40 is connected to the discharge hole 11 of the block 10, and the hose 41 is connected to the vacuum pressurizing device 40. This embodiment is an installation structure that allows a small amount of vacuum pressure to be required or to suck in and discharge the pore water from a relatively small range and small amount of soil. The vacuum pressurizing device 40 is installed directly on the block 10, the hose 41 is connected to the vacuum pressurizing device 40 to a predetermined distance, and the vacuum pressurizing device 40 at the same time as the position of the block 10 moves. The operation can be made immediately in).

Therefore, the fourth and fifth embodiments may be selectively applied according to the area of the soft ground or the type of soil.

Furthermore, the block having the vacuum pressure function of the present invention includes a moving device for moving to the soil position for dewatering. The moving device includes a backhoe or a crane for convenience in moving to various places. The moving device 50 is also used to pull up from the soil in order to separate the block intruding into the soil. Block 10 is formed with a pin (Pin), bolt (bolt) or a ring for coupling and separation with the moving device. In addition, a penetration device 60 for pressurizing the block 10 to the soil by forcing a predetermined impact or load on the block 10 is further included. In addition, the present invention may include a single device that can perform both the functions of the mobile device and the penetration device.

The dewatering method of the high water content sediment using the dewatering device having the vacuum pressurizing function of the present invention thus constructed will be described with reference to FIGS. 6A to 6F.

First, in FIG. 6A, the block 10 connected to the moving device 50 is moved to a location where the soft ground or the soil S of the high water content ratio or the dredged or excavated soil S is loaded. Inside the block 10, a plurality of drain pipes 30 may be integrally installed with the block 10, or the drain pipe 30 may be installed after the block 10 is inserted into the soil S.

In FIG. 6B, when penetration of the block 10 is moved to the determined position using the moving device 50, penetration is made to the soil S by the load of the block 10. However, if the block 10 is not infiltrated between the soil (S) by its own load, the block 10 is forcibly pressurized to the upper portion of the block 10 by using the penetration device 60 to be inserted into the soil (S). The block 10 of the present invention can be applied by selecting the same structure as in the embodiment of FIG. 2 or the embodiment of FIG. 3 in consideration of soft or hard soil (S) or the amount of absorption of the pore water.

In FIG. 6C, when penetration of the block 10 to the soil sand S is completed by the pressing force by the penetration device 60, in FIG. 6D, the discharge hole 11 in the upper portion of the block 10 infiltrated into the soil sand S is illustrated. Through the vacuum pressure device 40 to form a vacuum load. At this time, the discharge hole 11 may be connected to the hose 41 after the hose 41 is connected or the block 10 is inserted into the soil (S). Therefore, the vacuum pressure formed by the vacuum pressurizing device 40 is approximately -1 atmospheric pressure, i.e., -101.3 kPa, but may be applied up to approximately -0.8 atmospheric pressure, i.e., -81 kPa due to the efficiency of the vacuum pressurizing device and leakage of pressure. This is equivalent to the load applied when the soil having a unit weight of 2.0tonf / m3 is 4.0m stacked.

When the vacuum pressure is formed by the vacuum pressurizing device 40, the pore water contained in the earth and sand S is absorbed by the absorber 20 and then discharged along the hose 41 through the discharge hole 11. In addition, when a plurality of drain pipes 30 are installed in the block 10, the gap water contained in the soil is sucked up through the through hole 31 of the drain pipe 30 and fixedly coupled to the inner surface of the block 10. It is absorbed by the absorber 20. The gap water is discharged to the hose 41 through the discharge hole 11 along the absorbent material 20. This vacuum pressure is because a wall consisting of the upper and outer surfaces of the block 10 forms a boundary constraint on the vacuum pressure.

In FIG. 6E, the vacuum pressure generated by the vacuum pressurizing device 40 is at atmospheric pressure when a dewatering function such as a suction for a predetermined time or a suction amount of the pore water is made by sucking the gap water from the soil S by the vacuum pressurizing device 40. Release it. In other words, by releasing the vacuum pressure by the vacuum pressurizing device 40, the vacuum pressure inside the block 10 is at atmospheric pressure. In addition, when the inside of the block 10 is a high-soil, such as clay, even if the inside of the atmospheric pressure state soil (S) may be adhered to the inner wall surface of the block (10). Therefore, by supplying air to the block 10 with the vacuum pressurizing device 40 it will be possible to separate the soil sticking to the inner wall surface of the block 10. This is to easily separate the block 10 from the earth and sand, it is possible to minimize the load on the separation of the block with the moving device 50 by reducing the weight of the block 10, the soil is adhered.

FIG. 6F pulls the block 10 out of the soil using the moving device 50 in the atmospheric pressure state in which the vacuum pressure is released from the vacuum pressurizing device 40.

On the other hand, in the case where the vacuum pressure is not released after the dewatering function from the earth and sand S is completed, when the block 10 is pulled up from the earth and sand S by the moving device 50, a predetermined amount of earth and sand is contained in the block 10. Since it becomes a state integrated with the block 10 by a vacuum pressure, it can load on a dump truck etc. in this state. That is, when lifting the block 10 without releasing the vacuum pressure, a certain amount of desorption soil is adhered to the block, so that the block 10 is placed on the loading space of the dump truck, and then the vacuum pressurizing device 40 is placed. When the vacuum pressure is released to the atmospheric pressure state, the soil which has been dehydrated, which has adhered to the block 10 by the vacuum pressure, may be loaded on the dump truck.

In addition, the dewatering device of the present invention can directly apply a vacuum pressure by using a vacuum pressure device such as an underwater pump when the high water content of soil to be treated is in the water. At this time, the pressure applied to the high moisture content of the soil will be applied as much as the pressure plus the water pressure in the vacuum will be able to obtain an effect that the dewatering function for the high moisture content of the soil is increased. And it takes a considerable amount of time for the soil to be dewatered again to have a certain percentage of water content.

In addition, in the case of ultra soft soil having high water content, excessive floor load is rather destroyed and dewatering is not achieved. However, in the present invention, when suctioning and discharging the pore water from the soil by using the vacuum pressure, mechanically adjusting the magnitude of the vacuum pressure may perform dehydration while preventing the soft clay from being destroyed.

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone who has it will know it easily.

10: block 11: vent hole
12: outer block 13: inner block
14: space part 15, 31: through hole
16, 32: edge 20: absorbent material
30: drain pipe 40: vacuum pressurizing device
41: hose 50: moving device
60: penetration device S: earth and sand

Claims (2)

The inner block 13 and the outer block 12 are integrally formed or can be separated into a double block, the through-hole 15 is formed in the inner block 13 at regular intervals for suction of the gap water from the earth and sand, And the left and right and front and rear surfaces of the metal block 10 having a predetermined volume of internal volume in a polygonal or cylindrical shape;
An absorber 20 which fills the space 14 formed between the inner and outer blocks 12 and 13 of the block 10 and absorbs the sucked gap water;
A plurality of through-holes 31 are formed on the outer circumference to shorten the discharge flow path of the gap water, and the upper end is fixedly coupled to the inner upper surface of the block 10, and the plurality of metal pipes longer than the left and right and front and rear surfaces of the block 10. Drain pipe 30 of the material, and
A vacuum pressurizing device 40 for suctioning and discharging the gap water by forming a vacuum pressure inside the block through a hose 41 connected to the discharge hole 11 formed in at least one upper surface of the block 10;
The lower surfaces of the block 10 and the drain pipe 30 are each composed of saw blades or wedge-shaped edges 16 and 32 for intrusiveness between the earth and sand, and the block 10 occupies a certain area. The boundary is constrained so that the vacuum pressure is continuously maintained in the soil, and the block 10, the absorbent material 20, and the drain pipe 30 are fixedly coupled, and the vacuum pressure function can dewater the soil while moving the position integrally. Dehydration device having a.
The apparatus of claim 1, further comprising: a moving device (50) for moving the block (10) to a sedimentary position for dewatering or pulling up and separating a block inserted in the soil (soil); and a penetration device for injecting the block (10) into the soil. Dewatering device having a vacuum pressure function further comprising (60).

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