JP7061887B2 - Dehydration treatment method and equipment for hydrous soil - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention is suitable for dehydrating water-containing earth and sand, which is suitable for dehydrating soil with a high water content to be treated relatively easily and reducing the water content to a extent that it can be used as a filling material for sandbags and the like. Regarding processing methods and equipment.

For example, among the excavated soil generated by construction foundation excavation and the raised soil generated by compaction sand pile construction such as the sand compaction pile (SCP) method, there are many earth and sand that are difficult to transport or cannot be reused as they are due to their high water content. .. As a method and apparatus for dehydrating such hydrous earth and sand, Patent Documents 1 and 2 specifically disclose a configuration in which earth and sand having a high water content ratio are dehydrated by a suction action by a negative pressure of a vacuum pump to reduce the water content ratio. There is.

FIG. 8 is disclosed in Patent Document 1. In this dehydration treatment method, the screw conveyor 1 is composed of a screw 6 for transporting earth and sand, an outer cylinder 3 having a double structure as an outer cylinder thereof, and an inner cylinder 4 having a large number of water collecting holes 10. The water-containing earth and sand 29 introduced with the screw 6 side as the anode and the inner cylinder 4 side as the cathode are subjected to electric permeation to extract the internal water as the soil water 29a, and the peripheral gap 9 is subjected to vacuum dehydration action. Soil water 29a is sucked, collected and dehydrated (claims 1 and 2). Further, the main part of the device is provided with a screw conveyor 1 having a hopper 2 for introducing earth and sand at the front end and a soil discharge port 21 and a discharge pipe 7 at the rear end. The screw conveyor 1 is arranged inside the insulating outer cylinder 3 and the outer cylinder 3 via a peripheral gap 9, and is arranged in the inner cylinder 4 with a water collecting hole and the inner cylinder 4 to convey earth and sand. It has a screw 6, and the positive electrode of the DC power supply device 22 is connected to the screw 6 to serve as an anode, the inner cylinder 4 is connected to the negative electrode to serve as a cathode, and the vacuum pulling tube 28 connected to the vacuum pump is connected to the peripheral gap 9. (Claim 5).

9 (a) and 9 (b) are disclosed in Patent Document 2. In this dehydration treatment method, as a configuration for dehydrating the earth and sand excavated by the bucket to a state where it can be easily transported, the bucket 10c mounted on the arm of the excavator-based construction vehicle has a double structure, and the lining is configured by a net (perforated plate 10d). Then, the bucket 10c scoops up the earth and sand containing muddy water, and the bucket 10c is vibrated to promote the separation of water while creating a negative pressure in the space between the double structures, that is, by a suction action by the negative pressure of the vacuum pump. Separate the water (claims 1 and 3). In addition, the main part of the device has a double structure in which the bucket 10c is equipped with a net-made lining (perforated plate 10d) in order to dehydrate the earth and sand mixed with muddy water scooped up by the bucket to a state where it can be easily transported. It has a means (vacuum pump 11) for vacuum-sucking the gap space between the bucket main body and the net-made lining (perforated plate 10d), and a vibrator 13 provided in the bucket 10c.

Japanese Unexamined Patent Publication No. 2004-190417 Japanese Patent No. 4236869

In Patent Document 1, in the process of transporting the hydrous earth and sand to be treated from one end to the other end of the cylinder by a screw, the internal water is extracted as soil water by an electric permeation action and a vacuum dehydration action is performed in the peripheral gap. Since soil water is sucked and dehydrated, in addition to driving a screw conveyor, a DC power supply device used for electric permeation and a vacuum pump-related configuration for vacuum suction are required, which is complicated and increases operating costs. Japanese Patent Application Laid-Open No. 7-71052 discloses a configuration in which the above electroosmotic action is omitted and water is evacuated by a vacuum pump to dehydrate while moving earth and sand having a high water content by a screw conveyor. .. In this case, it is simplified by the amount that the electro-osmosis action is omitted as compared with Document 1, but the reduction of the operating cost cannot be expected so much because the screw conveyor is indispensable.

In Patent Document 2, the excavated earth and sand are evacuated to a state where they can be easily transported. In addition, since the action of vacuum pressure is local, work efficiency is poor and it is difficult to apply it because it takes time and effort when a large amount of water-containing earth and sand must be treated.

From the above background, an object of the present invention is to dehydrate water-containing sediment generated at a construction site or the like, which can be dehydrated relatively easily without requiring a transport power such as a screw conveyor. To provide methods and equipment. More preferably, by using as much as possible the equipment or device components used in the existing SCP and the covered sand pile construction method, the cost of the device can be suppressed and the dehydration process can be performed efficiently. Other purposes will be clarified in the following description.

In order to achieve the above object, the present invention of claim 1 is a method for dehydrating hydrous sediment, which reduces the water content ratio by dehydrating the earth and sand ES having a high water content by the suction action by the negative pressure of the vacuum pump, referring to the drawings. In a state where the casing 5 which is a tubular member is held at a vertical or predetermined inclination angle and the lid at the lower end of the casing is opened, a water-permeable bottomed tubular covering bag 4 is provided in the inner vertical direction inside the casing. After arranging, the lid is closed, the hydrous earth and sand ES to be treated is charged and accommodated in the covering bag 4 from the upper opening of the casing, and then the vacuum pump is used from a large number of suction holes 52 provided around the casing. It is characterized in that the inside of the casing 5 is sucked and the water-containing earth and sand in the covering bag is dehydrated by applying vibration to the casing by a vibrator 13 provided on the upper side of the casing .

The invention of claim 5 is a water-containing earth and sand dehydration treatment device for reducing the water content by dehydrating the earth and sand ES having a high water content by suction action by the negative pressure of the vacuum pump 7, and is vertical or predetermined by the support means 1. A casing 5 which is a tubular member held at an inclination angle and has a large number of suction holes 52 provided around it and a lid for opening and closing the lower end opening, and a casing 5 provided on the upper side of the casing to apply vibration to the casing. The vibrator 13 and the earth and sand input hopper 2 connected to the upper side of the casing 5 are arranged in the vertical direction inside the casing 5, and the target hydrous earth and sand can be received inside from the upper opening through the hopper. A water-permeable bottomed tubular coated bag 4, a suction tube 53 attached to the suction hole and connected to the suction side of the vacuum pump, and compressed air in the casing and above the coated bag are introduced. It is characterized in that it is provided with a pressurizing means 28 .

The above dehydration treatment method and apparatus have been devised by paying attention to the fact that the CP and the covered sand pile construction apparatus can be used as they are, except for the vacuum pump, the casing with suction holes, and the suction pipe. The support means for the casing may be supported by, for example, a backhoe machine, in addition to the leader of the crawler type machine described in the embodiment. The casing is preferably held substantially vertically, but it may have a predetermined inclination angle, that is, an angle at which the casing drops due to its own weight when the hydrous earth and sand are thrown in from above.

It is more preferable that each of the above inventions be embodied as described below.
(A) The configuration according to claim 1 is that the vacuum suction is performed by the vacuum pump and compressed air is introduced into the casing and applied to the upper side of the covering bag to pressurize the casing (claim 2) .

(A), claim 2, has a substantially tubular holder mounted on the upper end side of the covering bag and an opening / closing means disposed inside the holder, and the compressed air is introduced and pressurized. In the operation, the upper opening of the covering bag is switched to the closed state by the opening / closing means (claim 3) .

(C) In any one of claims 1 to 3, after the dehydration treatment, the covering bag in the state of containing earth and sand is pulled out from the lower opening of the casing, divided into predetermined lengths, and the divided surface is coated. (Claim 4). This is a configuration for creating sandbags as an example of using the covering bag used in the dehydration treatment method of the present invention together with the dehydrated earth and sand as illustrated in FIG. 7. Of course, for the dehydrated earth and sand, after pulling out the covering bag filled with earth and sand from the lower opening of the casing, or with the covering bag placed in the casing, take out the earth and sand from the covering bag and use it for embankment, for example. It may be used as earth and sand for CSP and for covered sand piles.

In the invention of claim 1, as a vacuum dehydration type, a water-permeable tubular covering bag is arranged in the vertical direction of the casing while the casing is held vertically or at a predetermined inclination angle, and a processing target is to be processed from the upper opening with respect to the covering bag. Since the inside of the casing is sucked by a vacuum pump from the suction hole around the casing after the water-containing earth and sand are charged and stored, a transfer power like a screw conveyor is required as compared with the configuration of dehydrating while moving the water-containing earth and sand as in Patent Document 1. However, even a large amount of hydrous earth and sand can be efficiently dehydrated relatively easily.

Further , in the present invention, dehydration of hydrous earth and sand can be promoted and dehydration efficiency can be improved by vacuum suctioning with a vacuum pump and applying vibration to the casing.

In the invention of claim 2, the dehydration of hydrous earth and sand can be promoted and the dehydration efficiency can be improved by vacuum-sucking with a vacuum pump and introducing compressed air in the casing to the upper side of the covering bag to pressurize. In this case, in the invention of claim 3, in the operation of introducing and pressurizing the compressed air, the upper opening of the covering bag is closed by the opening / closing means arranged inside the tubular holder mounted on the upper end side of the covering bag. The dehydration efficiency can be further improved in the state.

In the invention of claim 4 , sandbags can be easily made by pulling out from the casing together with a covering bag using dehydrated earth and sand as illustrated in FIG. 7, dividing into predetermined lengths, and covering the divided surface. That is, in the present invention, sandbags can be efficiently produced by going through a dehydration step, a drawing step, a splitting step, and a split surface sealing step, which is optimal for effective utilization of hydrous soil.

The invention of claim 5 is an apparatus suitable for the dehydration treatment method of claim 1, and as described above, it can be provided as a vacuum dehydration type with only a slight improvement in the existing SCP and a covered sand pile construction apparatus at a low cost. .. Specifically, except for the vacuum pump, casing, and suction pipe, the supporting means for the casing, the bucket for transporting earth and sand and its elevating means, the compressor, the sheave tank, etc., which constitute the SCP and the covered sand pile making device, are used as they are. Available. In addition, SCP and covered sand pile construction equipment are often used at construction sites where hydrous earth and sand to be treated are generated, so that costs can be reduced and implementation is easy.

Further , in the present invention, the pressurizing means and the vibration machine are also used in the SCP and the covered sand pile creating apparatus, and the vacuum dehydration action can be improved by using them.

It is a partially broken schematic block diagram which shows the dehydration treatment apparatus of the hydrous earth and sand of a form example. (A) and (b) are schematic cross-sections taken along line AA of FIG. (C) shows a modified example in which the arrangement of the suction holes (suction pipes) of the casing is changed. (A) is a schematic cross-sectional view showing the upper structure of the covering bag, (b) is a schematic top view showing the covering bag of (a) seen from above, and (c) is an opening and closing means for opening the upper opening of the covering bag. It is a schematic top view which shows in the closed state. (A) is a schematic diagram showing a sealing treatment configuration of both end faces when the covering bag is divided, and (b) is a schematic diagram showing a modified example of the sealing treatment configuration. In the dehydration treatment method of the present invention, (a) and (b) are schematic views showing a covering bag setting step of arranging a covering bag in a casing and a water-containing earth and sand charging step of putting water-containing earth and sand into the covering bag. It is a schematic diagram which shows the dehydration process which dehydrates by the suction action by the negative pressure of a vacuum pump by the dehydration treatment method of this invention. (A) is a schematic view showing the middle of drawing out the covering bag from the casing, and (b) is an explanatory view when dividing the covering bag containing the drawn earth and sand to make sandbags. It is explanatory drawing which shows the structure (FIG. 1) of the disclosure in Patent Document 1. FIG. (A) and (b) are explanatory views showing the structure (FIGS. 1 and 2) disclosed in Patent Document 2.

Hereinafter, a form example to which the present invention is applied will be described with reference to the drawings. In this description, after explaining the main constituent members of the dehydration treatment apparatus of the present invention, the dehydration treatment method using the same will be described in detail. The details of the drawings are simplified due to drawing restrictions. In particular, in FIGS. 4 to 5, a part of the attachment on the upper side of the casing is omitted.

(Device structure) In FIG. 1, this dehydration treatment device is omitted in the drawing, but it uses an existing SCP and a covered sand pile construction device, and its main members are a leader 1 which is a support means. It is provided with an attachment 10 slidably arranged along the side surface of the reader 1. Of these, the leader 1 is supported by a plurality of backstays while standing on the front support portion of a self-propelled base machine (not shown), as disclosed in, for example, Japanese Patent Application Laid-Open No. 2016-21251. Further, the base machine is equipped as standard with a leader undulating wire and its winch, a wire 6a for raising and lowering the bucket 6 along the leader 1, a winch thereof, a motor, an electric mount, and the like.

The attachment 10 includes upper and lower joint portions 11 and 12, a hopper 2 connected to the upper joint portion 11, a support plate 17 connected to the lower joint portion 12, and a vibrator provided above the upper joint portion 11. A vibro hammer 13 for penetration and a shock absorber 14 provided on the upper side of the vibro hammer 13 are provided, and these are arranged between the suspension wire 15 and a pulley device (not shown) provided on the top of the leader 1. It is suspended so as to be able to move up and down via the sheave block 16.

Of these, the hopper 2 includes a main body 20 having an upper opening and an inclined connecting portion 21. When the water-containing earth and sand in the bucket 6 are thrown into the main body 20, they are dropped by their own weight into the upper joint portion 11, the lower joint portion 12, and the casing 5 held by the flange member 18 through the inclined connecting portion 21. The casing. The upper joint portion 11 is provided with an air injection nozzle 27 that injects compressed air toward the discharge port 22 of the inclined connecting portion 21. The lower joint portion 12 is provided with an air valve 24 that opens and closes the discharge port 22 of the inclined connecting portion 21, and an air supply nozzle 28 that supplies compressed air to pressurize the inside of the casing 5.

The air valve 24 includes a valve body 25 mounted on the upper inner circumference of the lower joint portion 12 and a valve lid 26 pivotally supported by the valve body 25. The valve lid 26 is normally in an open position that hangs down from the valve body 25 due to its own weight. , It is pressed by the air pressure to close the valve. However, the opening / closing mechanism of the air valve 24 may have a structure other than this.

The air injection nozzle 27 and the air supply nozzle 28 are connected to a compressor provided on the ground surface via a dedicated supply pipe, and can independently inject compressed air of a required pressure when necessary. That is, the air injection nozzle 27 makes it possible to clear the clogging in the vicinity of the discharge port by blowing off the water-containing earth and sand that easily accumulates in the vicinity of the discharge port 22 by a predetermined air pressure. The air supply nozzle 28 switches the air valve 24 to the closed state, promotes the dehydration action described later by pressurizing the inside of the casing 5 with the air valve 24 closed, and is in the state of containing earth and sand after the dehydration treatment from the inside of the casing 5. The covering bag 4 is easily pulled out from the casing 5.

On the other hand, the support plate 17 holds the take-up drum 3 around which the wire 30 is wound so as to be able to be pulled out. The take-up drum 3 is a holder in which the wire 30 is freely wound into the cylinder of the casing 5 held by the flange member 18 and is provided at the drawer end of the wire 30 to connect the upper end side of the covering bag 4. It has 32. Here, the wire 30 is formed in a hollow tubular shape so that compressed air can be transferred from a compressed air supply source (not shown). The tips of the wires 30 are connecting wires 30a and 30b that are bifurcated via a connector 37. In the connecting wire 30a, a supply pipe 39 such as a tube for transferring compressed air is arranged along the wire. The supply pipe 39 is capable of transferring the compressed air transferred to the wire 30. As another configuration, the connecting wire 30a may be formed in a hollow tubular shape like the wire 30, and the supply pipe 39 may be omitted. In FIG. 1, reference numeral 31 is a guide member that guides the drawn end of the wire 30 to the center of the casing.

Further, as shown in FIG. 3, the holder 32 includes a steel outer ring 33, an inner ring 34 attached to the inside of the outer ring 33, and a tire tube-shaped rubber tube 35 arranged inside the inner ring 34. And have. Of these, the inner diameter of the outer ring 33 on the lower side is slightly smaller due to the overhanging portion 33a. On the upper end surface of the outer ring 33, a pair of substantially L-shaped metal fittings 36 mounted at a position displaced by 180 degrees are provided. The tip ends of the corresponding connecting wires 30a and 30b are connected to the pair of metal fittings 36.

Further, in the inner ring 34, an intermediate portion around the inner circumference is formed in a concave portion 34a having a one-step diameter, and a rubber tube 35 is attached to the concave portion 34a. The rubber tube 35 is an example of an opening / closing means for opening / closing the opening on the upper end side of the covering bag 4, allowing compressed air to be introduced into the tube from the supply pipe 39 and exhausting the air in the tube through the supply pipe 39. It is possible. That is, the rubber tube 35 is connected to the tip 39a of the supply pipe 39 with the outer peripheral side restricted to the concave portion 34a, and is gradually moved toward the inner diameter side of the inner ring 34 by the compressed air introduced from the supply pipe 39 . The upper opening of the covering bag 4 is closed by expanding to the maximum as shown in FIG. 3 (c). Further, when the rubber tube 35 is vacuum-sucked through the supply pipe 39, the wire 30, and the like, the rubber tube 35 is placed in the covering bag 4 in order to further reduce the amount of protrusion from the concave portion 34a as compared with the same (a) and (b). It does not get in the way when pouring water-containing earth and sand.

As shown in FIGS. 2 to 4, the covering bag 4 is formed in a bottomed tubular shape by a non-woven fabric or the like. The material may be woven fabric or porous plastic as long as it is water permeable. The length of the covering bag 4 is slightly shorter than the total size of the casing 5. The outer diameter of the covering bag 4 keeps a gap between the outer diameter of the covering bag 4 and the inner circumference of the casing 5 when it is suspended in the casing 5 as shown in FIG. 2A, but the water-containing earth and sand ES is inside the bag. When a predetermined amount is charged into the casing 5, the size is such that the casing 5 comes into contact with the inner circumference as in (b).

FIG. 4 shows a configuration example when the above-mentioned covering bag 4 is divided into a predetermined length to make a sandbag 40, and the divided end face opening is sealed. First, the configuration of FIG. 4A is an example in which the sealing body 42 or 43 is retrofitted to the end face edge or the periphery of the sandbag 40. The sealant 42 has a disk shape corresponding to the end face opening of the sandbag 40, and the outer peripheral edge is attached to the corresponding edge of the sandbag 40. The sealing body 43 has a cap shape and includes a disk portion 43a corresponding to the end face opening of the sandbag 40 and a tubular portion 43b integrated with the disk portion 43a and attached around the end side of the sandbag 40. Reference numeral 44 is a notch portion provided at a plurality of locations of the tubular portion 43b as needed. The lower side (cylindrical bottomed portion) of the covering bag 4 is closed by the sealing body 41 in a state of being arranged in the casing 5. Although the sealing body 41 is integrally formed with the covering bag 4, it may be a separate body, and may be further composed of the sealing bodies 42 and 43 instead of the sealing body 41. The sealing bodies 41 to 43 may be made of the same or similar water-permeable material as the covering bag 4. Of course, the above sealing bodies 41 to 43 may be omitted, and the lower opening of the covering bag 4 and the upper opening cut to a predetermined length may be tied with a string or the like to close them.

In the configuration of FIG. 4B, a flexible sealing body 45 is attached in advance around the covering bag 4, divided into sandbags 40, and then the sealing body 45 is inverted with the mounting side as a fulcrum. This is an example of closing the end face opening of the sandbag 40 by restraining the sealing body 45 in a squeezed state via a string 46. That is, the sealing body 45 has a tubular shape having a gap for threading the string around, and the string 46 fixes one end 46a in the peripheral gap and pulls the other end out from the peripheral gap. There is. Then, the sealing body 45 is overlapped with the peripheral portion of the covering bag 4 as shown in the lower side of the figure, and the end side located on the planned division side is attached to the covering bag 4. In this attached state, the drawer portion of the string 46 is arranged between the covering bag 4 and the sealing body 45, so that it does not get in the way. The sealing body 45 is inverted by 180 degrees with the mounting portion as a fulcrum as shown on the upper side of the figure from the state where the covering bag 4 is divided into the sandbags 40, and the string 46 is pulled in the direction of further pulling out the drawer end. When it is done, the whole is squeezed and closed. Further, in the sealing body 45, the split end face of the sandbag 40 is closed by winding the string 46 around the squeezed portion and locking the sealing body 45. In the above configuration, since the covering body 4 can be handled in a state where a plurality of sealing bodies 45 are attached in advance, the sandbag ES described later can be efficiently created.

On the other hand, the casing 5 is a tubular member having an outer diameter of 30 to 50 cm and a length of about 3 to 5 m, which is used for existing SCPs and covered sand pile building devices as shown in FIGS. 1 and 2. The lower joint portion 12, the upper joint portion 11 and the hopper 2 can be communicated with each other in a vertical state in which the upper end side is held by the flange member 18. Further, the casing 5 has a large number of suction holes 52 provided around the casing 5 and a lid 51 rotatably supported at the lower end to open and close the lower end opening. As shown in FIG. 2A, a plurality of suction holes 52 are provided at locations that divide the circumference into four equal parts and at predetermined intervals in the longitudinal direction. In this case, the suction holes 52 are provided in the longitudinal direction as in the modified example of the same (c), and a plurality of suction holes 52 (four in this example) provided around the upper side and a plurality of suction holes 52 provided around the lower side thereof. If the suction holes 52 (four in this example) are displaced by a predetermined angle (about 45 degrees in this example) in the circumferential direction, the inside of the casing 5 can be sucked more uniformly.

A suction pipe 53 for connection is attached to each suction hole 52 by welding or the like. In this suction structure, each suction pipe 53 is connected to the gas-liquid separator 8 connected to the vacuum pump 7 via a connection pipe 54 to 56 or the like, and the suction force due to the negative pressure of the vacuum pump 7 is applied. They act in the casing 5 via the connecting pipes 54 to 56, the suction pipe 53, and the like. In other words, in this structure, the negative of the vacuum pump 7 via the suction pipes 53 and the connecting pipes 54, 55, 56 in a state where the target hydrous earth and sand ES is charged and accommodated in the covering bag 4 arranged in the casing 5. By exerting a suction action by pressure, the water content of the water-containing earth and sand ES in the casing bag 4 is dehydrated and the water content ratio is reduced. In this example, the water content of the hydrous earth and sand ES in the covering bag 4 is sucked as muddy water together with air by the negative pressure of the vacuum pump 7 and enters the gas-liquid separator 8. Then, in the gas-liquid separator 8, the sucked muddy water is transferred to the muddy water storage tank 9 in a state where the air is removed and stored.

(Dehydration Treatment Method) Next, a dehydration treatment method using the above dehydration treatment apparatus will be described. In this example, as shown in FIGS. 5 to 7, the hydrous soil to be treated is dehydrated, and the operation of creating sandbags using the treated soil and the used covering bag will be described in detail.

In this dehydration treatment method, the covering bag setting step of suspending and setting the covering bag 4 with respect to the casing 5 supported upright, and the water-containing earth and sand ES to be treated are put into the bag of the covering bag 4 set in the casing 5. The water-containing earth and sand injection step and the dehydration step of dehydrating the water-containing earth and sand ES in the covering bag 4 by sucking the inside of the casing 5 with the vacuum pump 7 are performed. Further, when the sandbag SD is prepared by using the earth and sand after the dehydration treatment, the sandbag SD is next to the dehydration step, and then the drawing step of pulling out the covering bag 4 containing the dehydrated earth and sand from the inside of the casing 5 and the earth and sand accommodating. The covering bag 4 is cut into sandbags 40 having a predetermined length in a state of containing earth and sand and divided, and a divided surface sealing step of sealing the divided surface of the sandbag 40 is performed.

Here, in the covering bag setting step, the lid 51 provided on the lower end side of the casing 5 is opened as shown in FIG. 5A. Next, the wire 30 is pulled out by the rewinding operation of the take-up drum 3, and is pulled out from the lower end opening of the casing 5. Then, after the wire drawing end side is connected to the holder 32 mounted on the upper end side of the covering bag 4, the covering bag 4 is set in the casing 5 via the wire 30 by the winding operation of the take-up drum 3. do. After setting, the lid 51 is closed.

In the water-containing sediment injection step, as shown in FIG. 5B, the bucket 6 containing the hydrous sediment ES is lifted from the ground surface side, and the hydrous sediment ES in the bucket 6 is dropped into the main body 20 of the hopper 2 from the outlet of the bucket. Will be done. Then, the water-containing earth and sand ES in the main body 20 passes through the inclined connecting portion 21, the discharge port 22 of the upper joint portion 11 and the lower joint portion 12, and further into the covering bag 4 arranged in the casing 5 from the opening of the air valve 24. It is dropped by its own weight. In that case, it is preferable to inject compressed air from the air injection nozzle 27 toward the discharge port 22 as necessary to prevent clogging in the vicinity of the discharge port. Further, after a predetermined amount of the hydrous earth and sand ES is put into the covering bag 4, the upper opening of the covering bag 4 is closed. That is, in this operation, the rubber tube 35 is expanded by the compressed air introduced through the supply pipe 39 and the like, and the opening of the inner ring 34 is closed by the expanded rubber tube 35 as shown in FIG. 3C. ..

In the dehydration step, as shown in FIG. 6, the water-containing earth and sand ES charged in the covering bag 4 is dehydrated by sucking the inside of the casing 5 with the vacuum pump 7. In this vacuum dehydration method, when the vacuum pump 7 is driven, the water dehydrated from the water-containing earth and sand ES in the covering bag 4 passes through a large number of suction pipes 53 and connection pipes 54 to 56 to become muddy water, which is a gas-liquid separator. It flows into 8 and is stored in the muddy water storage tank 9 in a state where gas such as air is separated.

Further, in the dehydration step, it is preferable that compressed air is introduced from the air supply nozzle 28 into the casing 5 to the upper side of the covering bag 4 together with vacuum suction by the vacuum pump 7 to pressurize. In this pressurizing operation, when the upper opening of the covering bag 4 is closed by the rubber tube 35, the entire covering bag 4 is pressed downward, so that the dehydration of the water-containing earth and sand ES in the covering bag 4 is also promoted. Dehydration efficiency can be improved. Further, by driving the vibro hammer 14 and applying vibration to the casing 5 together with vacuum suction by the vacuum pump 7, the dehydration of the water-containing earth and sand ES in the covering bag 4 can be promoted and the dehydration efficiency can be improved.

In the drawing step, as shown in FIG. 7A, the lid 51 of the casing 5 is opened, and the covering bag 4 containing the dehydrated earth and sand while pulling out the wire 30 by the rewinding operation of the take-up drum 3 is placed in the casing 5. Pull out from the lower end opening. In this drawing operation, compressed air is injected from the air supply nozzle 28 as needed to pressurize the inside of the casing 5 from above, so that the covering bag 4 in the earth and sand containing state can be easily pulled out from the casing 5. When the sandbag SD is not created, for example, by opening the lid 51 from the state shown in FIG. 6 and cutting the bottom portion of the covering bag 4, or by cutting the bottom portion of the covering bag 4 or from the drawer state of FIG. 7, the bottom portion of the covering bag 4 is formed. By cutting the cover bag 4, the dehydrated earth and sand in the covering bag 4 will be collected.

In the separation step, as shown in FIG. 7B, the covering bag 4 containing the earth and sand is cut into sandbags 40 having a predetermined length in the state of containing the earth and sand and divided. After that, in the division surface sealing step, the division surface of the sandbag 40 is sealed with the above-mentioned sealing bodies 42, 43 and the like. In this step, for example, when the sealing body 45 of FIG. 4B is used, the cut portion can be quickly sealed, so that when the covering bag 4 is cut, the earth and sand in the bag moves out from the cutting portion. Although it protrudes, it becomes easier to minimize the amount of protrusion.

The above embodiment does not limit the present invention at all. The present invention may include the components specified in each claim, and the details may be variously changed or developed as necessary. In particular, the configuration for supporting the casing and the covering bag, the configuration for raising and lowering the attachment up and down, the configuration for sealing the end face opening obtained by dividing the covering bag, and the like can be appropriately changed.

1 ... Leader (support means)
2 ... Hopper 3 ... Winding drum (30 is wire)
4 ... Covered bag (40 is a sandbag)
5 ... Casing (51 is a lid, 52 is a suction hole)
6 ... Bucket 7 ... Vacuum pump 8 ... Gas-liquid separator 9 ... Muddy water storage tank 13 ... Vibro hammer (vibrator)
14 ... Shock absorber 24 ... Air valve 28 ... Air supply nozzle (pressurizing means)
32 ... Holder 33 ... Outer ring 34 ... Inner ring 35 ... Rubber tube (opening and closing means)
37 ... Connecting tool 38 ... Supply pipe 40 ... Sandbag 41 ... Sealing body 42 ... Sealing body 43 ... Sealing body 45 ... Sealed body 53 ・ ・ ・ ・ Suction pipe 54 ・ ・ ・ ・ Connection pipe 55 ・ ・ ・ ・ Connection pipe 56 ・ ・ ・ ・ Connection pipe ES ・ ・ ・ ・ Sediment (water-containing earth and sand)
SD ... Sandbag

Claims (5)

It is a dehydration treatment method for hydrous soil that reduces the water content by dehydrating the earth and sand with a high water content by the suction action of the negative pressure of the vacuum pump.
With the casing, which is a tubular member, held at a vertical or predetermined inclination angle and the lid at the lower end of the casing opened, a water-permeable bottomed tubular covering bag is placed in the inner vertical direction inside the casing, and then the lid is placed. Is closed, and the hydrous earth and sand to be treated is charged and stored in the covering bag from the upper opening of the casing .
The inside of the casing is sucked by the vacuum pump from a large number of suction holes provided around the casing, and the casing is vibrated by a vibration machine provided on the upper side of the casing to contain water in the coated bag. A method for dehydrating hydrous earth and sand, which comprises dehydrating the earth and sand. The method for dehydrating hydrous earth and sand according to claim 1, wherein the vacuum pump sucks vacuum and introduces compressed air into the casing to the upper side of the covering bag to pressurize the air. It has a substantially tubular holder mounted on the upper end side of the covering bag and an opening / closing means arranged inside the holder, and in an operation of introducing compressed air to pressurize the covering bag by the opening / closing means. The method for dehydrating water-containing earth and sand according to claim 2, wherein the upper opening of the water-containing earth and sand is switched to a closed state. Claims 1 to 3 are characterized in that, after the dehydration treatment, the covering bag in the state of containing earth and sand is pulled out from the lower opening of the casing, divided into predetermined lengths, and the divided surface is coated to form sandbags. The method for dehydrating hydrous earth and sand according to any one of the above. It is a dehydration treatment device for water-containing soil that reduces the water content by dehydrating the soil with a high water content by the suction action of the negative pressure of the vacuum pump.
A casing that is a tubular member that is held vertically or at a predetermined tilt angle by a support means and has a large number of suction holes provided around it and a lid that opens and closes the lower end opening.
A vibration machine provided on the upper side of the casing and applying vibration to the casing,
A hopper for loading earth and sand connected to the upper side of the casing,
A permeable bottomed tubular covering bag that is arranged in the vertical direction inside the casing and is capable of receiving the target hydrous soil from the upper opening through the hopper.
A suction tube attached to the suction hole and connected to the suction side of the vacuum pump,
A dehydration treatment apparatus for hydrous soil, which comprises a pressurizing means for introducing compressed air in the casing and above the covering bag .

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