JP6298029B2 - Dehydration method for flexible containers - Google Patents

Description

The present invention relates to the dehydration method of a flexible container back grayed, in particular, were packed in a flexible container bag is a flexible bag having a permeability accommodating, flexible container back grayed removing moisture from the soil It relates to a dehydration method.

  Conventionally, highly water-containing viscous soils (for example, dry soil such as roadside grooves and fine-grained portions after wet classification treatment) have high fluidity although they are viscous. Therefore, the volume is large as it is, and transportation and storage are difficult. Therefore, a dehydration process is performed.

  As the dehydration method, the most inexpensive method is natural drying (for example, drying in the sun with a thin layer in a large work place). However, natural drying requires a lot of space and requires a lot of time for dehydration. For this reason, various mechanical dehydration methods that can be dehydrated in a short period of time have been implemented today instead of natural drying.

  However, the conventional mechanical dehydration method requires a large dedicated work device, and requires a large vehicle or a large crane for its transport assembly. For this reason, for example, there is a problem that it is difficult to cope with in-situ dewatering of agricultural ponds and roadside gutters. Therefore, today, a method of easily dewatering from earth and sand packed in a flexible container bag or the like has become the mainstream. For example, a method of compressing and dewatering using a hydraulic mechanism (see, for example, Patent Document 1), a hydraulic power source of a hydraulic excavator, and the like. There is known a method of dehydrating by compressing by vibration and pressing using a material (for example, see Patent Document 2).

Japanese Patent Laid-Open No. 10-156107. Japanese Patent No. 3889665.

  However, a method known in Patent Document 1 in which earth and sand packed in a flexible container bag or the like is compressed and dehydrated by a hydraulic mechanism, or a patent that dehydrates by pressing and compressing using a hydraulic source of a hydraulic excavator. The method known from Document 2 has the following problems.

  For example, when processing earth and sand having a high fine particle content, in the dehydration process, the density of the earth and sand around the bag body is increased by drainage, the permeability coefficient is lowered, and the permeability is significantly deteriorated. Therefore, a cylindrical flexible container bag 101 having a circular horizontal section as shown in FIG. 7A, or a prismatic flexible container bag having a rectangular horizontal section as shown in FIG. 7B. When the debris treatment is performed by storing the earth and sand 303 in 201, drainage is often performed in the earth and sand 303a located on the outer peripheral side in the flexible container bags 101 and 201, but the earth and sand 303b located near the center side. In this case, drainage becomes difficult, and there is a problem that uniform dehydration treatment is not performed or a long time is required for drainage.

  Therefore, a technical problem to be solved in order to provide a flexible container bag dewatering method that can uniformly and quickly and reliably perform dewatering treatment of earth and sand packed in a flexible container bag. The present invention aims to solve this problem.

The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 applies a load to the earth and sand packed and accommodated in a flexible container bag which is a flexible bag body having water permeability. A method for dehydrating a flexible container bag, wherein the earth and sand are accommodated in the flexible container bag, a drainage material capable of sucking moisture is placed on the earth and sand substantially horizontally, and in plan view In which at least one end side of the drainage material is attached to the inner surface of the flexible container bag and the other end side passes through the vicinity of the center of the flexible container bag, and the storage of the earth and sand and the installation of the drainage material are alternately repeated. a dehydration treatment after, provides a method of dehydrating the flexible container bag.

  In this method, after the drainage material is installed and the earth and sand are stored in the flexible container bag, a load is applied to the earth and sand from above the flexible container bag to perform pressure dehydration. In addition to shortening the drainage distance by this pressurization, the moisture in the earth and sand located near the center of the flexible container bag is sucked into the drainage material by the generated excess pore water pressure. The absorbed moisture is bypass-induced to the inner surface (drainage side) of the flexible container bag through the drainage material, and further drains to the outside through the flexible container bag. The drainage here promotes dehydration from the earth and sand by bypassing to the drainage side with pressurization and drainage material. On the other hand, the moisture in the earth and sand on the outer peripheral side from the center of the flexible container bag also exudes from the earth and sand by its own pressure, and proceeds to the inner surface of the flexible container bag or the drainage material. Permeated through and drained to the outside. Thereby, it is possible to dehydrate substantially uniformly to the entire inside of the earth and sand in the flexible container bag, and it is possible to shorten the time for removing moisture contained in the earth and sand.

  The invention according to claim 2 is the dehydration method according to claim 1, wherein a plurality of the drainage materials are arranged in the middle of the flexible container bag and are spaced apart from each other in the height direction. Provide a method.

  According to this method, in the flexible container bag, the entire sediment in the flexible container bag can be effectively dehydrated via the plurality of drainage materials arranged apart in the height direction. .

  The invention according to claim 3 provides the dewatering method of the flexible container bag according to claim 1 or 2, wherein the drainage material is formed of a biodegradable material.

  According to this method, by using drainage material formed of biodegradable material, even if the drainage material is discarded together with the earth and sand, it is biodegraded by the action of microorganisms in the soil after the passage of time. It can be dissolved and mixed together, and the drainage material can be eliminated naturally. This can contribute to the natural environment.

  The invention according to claim 4 is the dewatering method according to claim 1, 2, or 3, wherein the flexible container bag is accommodated in a container capable of draining from the outer periphery and the bottom and the load is applied. A method for dehydrating a bag is provided.

According to this method, since the flexible container bag and the earth and sand can be formed following the shape of the container, the flexible container bag containing the earth and sand can be easily formed into a fixed shape .

  ADVANTAGE OF THE INVENTION According to this invention, the whole earth and sand accommodated in the flexible container bag can be dehydrated substantially uniformly to the inside. In addition, it is possible to shorten the time for removing moisture contained in the earth and sand, and it is possible to perform dehydration processing in a short period of time.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic explanatory drawing of the dehydration processing apparatus used in order to implement the dehydration method of the flexible container bag which concerns on this invention, (a) is a figure which shows the state before applying a load to earth and sand, (b) is a load to earth and sand. It is a figure which shows the state after adding. It is a perspective view which shows roughly an example of the flexible container bag used with the dehydration processing apparatus shown in FIG. The perspective view explaining the attachment structure of a drainage material in the flexible container bag shown in FIG. It is a longitudinal cross-sectional view explaining the effect | action of the flexible container bag shown in FIG. It is the sectional view on the AA line of FIG. 4 explaining the effect | action of the flexible container bag shown in FIG. It is a perspective view explaining the modification of the attachment structure of the drainage material in the flexible container bag shown in FIG. It is a figure explaining the problem of the conventional dehydration processing method, (a) is the case of a cylindrical flexible container bag with a horizontal cross section, and (b) is a rectangular cylindrical flexible container bag with a horizontal cross section of a quadrangle. This is the case.

The object of the present invention is to provide a flexible container bag dewatering method capable of performing dewatering treatment of earth and sand contained in the flexible container bag uniformly, quickly and reliably in the flexible container bag. In order to do so, a dewatering method for a flexible container bag, which removes moisture by applying a load to earth and sand packed in and accommodated in a flexible container bag, which is a flexible bag body having water permeability, is provided in the flexible container bag. A drainage material capable of containing the earth and sand and capable of sucking moisture is placed substantially horizontally on the earth and sand , and at least one end side of the drainage material is attached to the inner surface of the flexible container bag in a plan view, and the other end side is and arranged to pass through the vicinity of the center of the flexible intermediate bulk container, accommodating the soil A dehydration treatment after repeated alternately installation of the drainage material, was achieved by.

  Hereinafter, an embodiment of a dewatering method for a flexible container bag according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic explanatory view of a dehydrating apparatus used for carrying out the method for dehydrating a flexible container bag according to the present invention, (a) is a diagram showing a state before applying a load to earth and sand, (b) It is a figure which shows the state after applying a load to earth and sand.

  In FIG. 1, the dehydration processing apparatus 10 stores a flexible container bag 11 that stores earth and sand 14 containing moisture in a container 12, and the earth and sand by a weight plate 13 from above the flexible container bag 11 stored in the container 12. 14 is left in a state where a load P is applied to the entirety of 14 to perform dehydration. The dehydration apparatus 10 includes a container 12, a flexible container bag 11 disposed in the container 12, and a weight plate 13.

  In addition, the earth and sand 14 here includes highly water-containing viscous soil (for example, dry soil such as roadside grooves, fine grain after wet classification, etc.), earth and sand having a high fine grain content, gravel, and the like. It refers to earth and sand in a broad sense.

  As shown in FIG. 2, the container 12 is formed in a cylindrical shape or a rectangular cylindrical shape (in this embodiment, a cylindrical shape) according to the outer shape of the flexible container bag 11. Further, the upper surface side is opened to allow the flexible container bag 11 and the weight plate 13 to be taken in and out. More specifically, the container 12 has a peripheral surface 12a formed of a punching metal and a bottom surface 12b formed of a mesh pallet. The container 12 can be drained from either the peripheral surface 12a or the bottom surface 12b.

  The flexible container bag 11 is made, for example, as a flexible bag made of mesh fabric knitted with polypropylene fibers. The flexible container bag 11 has a peripheral surface 11a and a bottom surface 11b, and is formed as a bottomed cylindrical or bottomed rectangular cylindrical bag body having an open top surface (cylindrical in this embodiment). The peripheral surface 11a and the bottom surface 11b of the flexible container bag 11 have water permeability, and only the moisture contained in the earth and sand 14 is allowed to pass through the peripheral surface 11a and the bottom surface 11b, and the earth and sand 14 itself remains in the flexible container bag 11. It is like that.

  More specifically, as shown in FIG. 2, the flexible container bag 11 is a pair of affixed to the outer surface side of the peripheral surface 11a and the bottom surface 11b so as to be continuous over the peripheral surface 11a and the bottom surface 11b. Hanging straps 15, 15 are provided. On the other hand, two pairs (17a and 17a, 17b and 17b) of drainage material attachment pieces for attaching the strip-shaped drainage material 16 are attached to the inner surface side of the peripheral surface 11a. The drainage material mounting piece pairs 17a, 17a and 17b, 17b are arranged to face each other at 180 degrees apart. Further, the drainage material attachment piece pair 17a, 17a and the drainage material attachment piece pair 17b, 17b are provided apart from each other by a predetermined dimension in the height direction of the flexible container bag 11.

  The drainage material mounting pieces (17a, 17a, 17b, 17b) and the drainage material 16 are both formed of a fiber material that can absorb moisture. Further, at least the drainage material 16 is a plastic board drain formed of a biodegradable material (also referred to as “biodegradable plastic”). For example, even if the drainage material 16 is discarded together with the earth and sand 14, It is biodegraded by the action of microorganisms in the soil, melted and mixed in the soil, and the drainage material 16 can be naturally extinguished.

  When the drainage material 16 is attached to a pair of opposing drainage material attachment pieces 17a, 17a or drainage material attachment pieces 17b, 17b, as shown in FIGS. 4 and 5, one end side of the drainage material attachment piece is one side. The flexible container bag 11 is adjacent to the inner surface (circumferential surface 11a) of the flexible container bag 11 through 17a or 17b, the other end passes through the vicinity of the center of the flexible container bag 11, and the flexible container through the drainage material mounting piece 17a or 17b on the opposite side. The bag 11 is disposed substantially horizontally with respect to the bottom surface 11b so as to be adjacent to the inner surface (circumferential surface 11a). The drainage material 16 is attached to the pair of drainage material attachment pieces 17a and 17a or the drainage material 16 is attached to the drainage material attachment pieces 17b and 17b by placing the weight plate 13 on the flexible container bag 11 from above. At the festival when the flexible container bag 11 and the earth and sand 14 are pressed by the weight plate 13, the drainage material 16 is attached by, for example, staples as shown in FIG. 3 so that the drainage material 16 does not come off from the drainage material attachment pieces 17a, 17a, 17b, 17b. It is done. Reference numeral 18 shown in FIG. 3 is a staple that is stapled.

  The weight plate 13 is sized to enter the opening of the container 12 and is formed in a disk shape in this embodiment. The weight plate 13 is provided with a hook 13a for suspension. The flexible container bag 11 containing the earth and sand 14 is shaped into the same cylindrical body as the inner shape of the container 12.

  Next, a method for dehydrating the earth and sand 14 such as gravel containing moisture using the dehydration apparatus 10 configured as described above will be described.

  First, the drainage material 16, the flexible container bag 11 to which the drainage material 16 is not attached, the container 12, and the weight plate 13 are prepared.

  Next, the flexible container bag 11 is placed in the container 12. In addition, the timing which sets the flexible container bag 11 in the container 12 may be arrange | positioned after all the attachment of the earth and sand 14 and the drainage material 16 which are demonstrated below are completed. In the processing of the earth and sand 14 by the flexible container bag 11, first, the earth and sand 14 containing moisture is put into the flexible container bag 11 until the height of the pair of drainage material attachment pieces 17a and 17a is reached. When the earth and sand 14 enter the height position of the pair of drainage material attachment pieces 17a and 17a, both ends of the drainage material 16 are fixed to the pair of drainage material attachment pieces 17a and 17a, respectively, and are attached substantially horizontally.

  When the drainage material 16 is attached to the pair of drainage material attachment pieces 17a and 17a, the earth and sand 14 is again placed in the flexible container bag 11 until the height of the pair of drainage material attachment pieces 17b and 17b is reached. throw into. When the earth and sand 14 reaches the height position of the pair of drainage material mounting pieces 17b, 17b, both ends of the separately prepared drainage material 16 are fixed to the pair of drainage material mounting pieces 17b, 17b, respectively, and substantially horizontal. Attach to.

  When the drainage material 16 is attached to the pair of drainage material mounting pieces 17b and 17b, the earth and sand 14 is again put into the container 12 to a predetermined height position, and then the upper opening of the flexible container bag 11 is closed. .

  When the upper opening of the flexible container bag 11 is closed, the weight plate 13 is placed from the upper side of the flexible container bag 11 in the container 12, and the flexible container bag 11 and the earth and sand 14 are pressed by the weight plate 13. That is, the flexible container bag 11 and the earth and sand 14 are pressurized with the weight of the weight plate 13. FIG. 1A shows an initial state of pressurization.

  Moreover, when the pressurization by the weight plate 13 is continued, the earth and sand 14 containing moisture in the flexible container bag 11 is located on the outer peripheral portion side from the center of the flexible container bag 11 due to the excessive pore water pressure generated by the pressurization. The moisture in the earth and sand 14a proceeds to the peripheral surface 11a or the bottom surface 11b of the flexible container bag 11 so as to ooze out toward the peripheral surface 11a and the bottom surface 11b of the flexible container bag 11. Further, the flexible container bag 11 is permeated to be discharged to the outside. The discharged water is further discharged to the outside from the container 12 as exuded water. In FIG. 1B, the dots shown in the container 12 schematically show a state in which exudate is discharged to the outside through the peripheral surface 12a and the bottom surface 12b of the container 12.

  On the other hand, as shown in FIGS. 4 and 5, the water in the earth and sand 14b on the central portion side of the flexible container bag 11 is absorbed and collected by the drainage material 16 attached in the flexible container bag 11, and further drained. Bypassing through the material 16 to the drainage material mounting pieces 17a, 17a, 17b, 17b and the peripheral surface 11a of the flexible container bag 11 is bypassed. In addition, the arrow shown in FIG.4 and FIG.5 has shown the flow of the water | moisture content, and the water | moisture content by which the bypass induction | guidance | derivation was carried out with the drainage material 16 permeate | transmits the flexible container bag 11, and is discharged | emitted outside. The discharged water is further discharged to the outside from the container 12 as exuded water.

  As a result, the entire earth and sand 14 in the flexible container bag 11 can be dehydrated substantially uniformly up to the inside thereof, and the time for removing moisture contained in the earth and sand 14 can be shortened. FIG. 1B shows a state after the dehydration process proceeds in this way.

  When the dehydration process is completed, the weight plate 13 is removed from the flexible container bag 11, and the flexible container bag 11 is taken out of the container 12 together with the earth and sand 14. Then, when the flexible container bag 11 in which the earth and sand 14 is put is taken out and moved to a predetermined position, the work is finished.

  Therefore, according to this dehydration method, the entire earth and sand 14 in the flexible container bag 11 can be dehydrated substantially uniformly to the inside. Moreover, it becomes possible to shorten the removal time of the water | moisture content contained in the earth and sand 14, and a dehydration process is attained in a short period of time.

  In the flexible container bag 11, the number of installed drainage materials 16 installed in the state of being embedded in the earth and sand 14 and the installation interval differ depending on the size of the flexible container bag 11 and the type of the earth and sand 14, and are arbitrarily set. The

  Further, the drainage material 16 has disclosed a structure in which both ends thereof are fixed to the drainage material mounting pieces 17a and 17a, 17b and 17b, respectively, but only one end side is fixed to the drainage material mounting pieces 17a and 17b in a plan view, The other end side may pass through the vicinity of the center of the flexible container bag 11 so as to be arranged substantially horizontally.

  Further, as shown in FIG. 6, the drainage material mounting pieces 17a, 17a and 17b, 17b are provided by being displaced by 90 degrees from each other, the drainage material 16 attached to the drainage material mounting pieces 17a, 17a, the drainage material mounting piece 17b, You may provide so that the drainage material 16 attached to 17b may mutually cross.

  Furthermore, the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

  The present invention can also be applied to operations for performing dehydration treatment other than earth and sand.

DESCRIPTION OF SYMBOLS 10 Dehydration processing apparatus 11 Flexible container bag 12 Container 12a Perimeter surface 12b Bottom surface 13 Weight plate 13a Suspension hook 14 Sediment sand 14a Sediment sand 14b on the outer peripheral side 15Sed sand 15 near the center side Suspension string 16 Drainage materials 17a-17b Piece 18 Needle P Load

Claims (4)

A method for dehydrating a flexible container bag, which removes moisture by applying a load to earth and sand packed in and accommodated in a flexible container bag which is a flexible bag body having water permeability,
Storing the earth and sand in the flexible container bag;
A drainage material capable of sucking moisture is placed substantially horizontally on the earth and sand, and at least one end side of the drainage material is attached to the inner surface of the flexible container bag in a plan view, and the other end side is the center of the flexible container bag. Arrange it so that it passes nearby,
A method for dewatering a flexible container bag, characterized in that dewatering is performed after alternately storing the earth and sand and installing the drainage material.   2. The dewatering method for a flexible container bag according to claim 1, wherein a plurality of the drainage materials are arranged in the flexible container bag so as to be separated from each other in the height direction.   The method for dewatering a flexible container bag according to claim 1, wherein the drainage material is formed of a biodegradable material.   The method of dehydrating a flexible container bag according to claim 1, 2 or 3, wherein the flexible container bag is accommodated in a container capable of draining from an outer periphery and a bottom portion and the load is applied.