JP2011042926A - Water leakage prevention device for bank and method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely guide water leaking from a water leakage section 6 into a water storage tank through an erosion ditch by driving pipes 16 into the ground and surrounding the water leakage section 6 to shut off the erosion ditch with the pipes 16 even if there is the erosion ditch in the ground. <P>SOLUTION: The water leakage prevention device for a bank includes the water storage tank having an intake 10 opened on its bottom face, an annular packing 11 mounted to an upper face of the intake 10 around it on the bottom face, and the pipes 16 penetrating through the packing 11 and the intake 10 of the water storage tank and driven into the ground. The packing 11 is brought into pressure-contact with the bottom face of the water storage tank by a pressing means. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an apparatus and a method for suppressing water leakage from a dike caused by piping when a river increases due to heavy rain.

  As shown in FIG. 1, the river 1 is usually separated from a living area 3 by a dike 2, and the dike 2 has a height that does not normally overflow even if the river 1 increases. The water of the river 1 does not flow out of the bank and overflow into the bank.

  However, the embankment 2 is aged over a long period of time, a void is formed by cracks, drilling by small animals, invasion of plant roots, etc., and water infiltrates into the void at the time of water increase, and furthermore, a sand layer having water permeability due to water head pressure A water channel 5 leaks into the bank through 4 and river water may leak into the bank through the water channel 5.

  This phenomenon is called piping, and if left unattended, digging occurs due to the water flowing in the water channel 5, the water channel 5 expands, and further, the amount of leakage increases, which accelerates the drilling. The water path 5 spreads rapidly, and in the worst case, there is a possibility of reaching a bank break. Therefore, when piping occurs, it is necessary to take preventive measures at an early stage.

  The most commonly used method for preventing piping is a so-called pot-stage or lunar ring method. This method is described in detail in http://www.cgr.mlit.go.jp/ctc/tech_dev/topics/suibou/s_syurui09.htm and links.

  That is, it is a construction method that suppresses the acceleration of water leakage by the water head pressure of the stored water by surrounding the water leakage location 6 with a sandbag and storing the leaked water inside the sandbag. In the case of water leakage, the method of enclosing the surrounding area in a ring with sandbags is called a pot-stage method, and when water leaks from the back slope of the levee, the method of surrounding the water leakage location 6 with a sandbag against the slope in a half moon It is called the moon-wheeler.

  These methods do not completely prevent water leakage, but merely suppress the flow rate of the water in the water channel 5, but if the increase in the river 1 disappears over time, water will flow into the water channel 5. The distribution of water has decreased, the sediment contained in the water has settled in the water path 5 and the water leakage has decreased, eventually the water path 5 has disappeared and the water leakage has stopped naturally. Even if the water leakage is temporarily suppressed at the time of water increase, it is sufficiently effective.

  However, in these construction methods, many people are required to implement this, and a large number of sandbags must be prepared. It is extremely difficult to put such a large number of personnel and materials into the leak location.

  Moreover, in order to implement these construction methods, it is necessary that the ground on which the sandbags are stacked is flat to some extent. Since the sandbag is deformable, it can follow even if there is unevenness, but if there are severe unevenness or steps on the ground that the sandbag cannot follow, water leaks from the gap between the sandbag and the ground Insufficient water level to prevent piping. In addition, more people and materials are required to smooth out these irregularities.

  Moreover, there is a device described in Japanese Patent Application Laid-Open No. 2008-115634 as a device for storing water that springs from the ground. This device is to place a container having an opening on the bottom in a spring location, seal the space between the bottom of the container and the ground with a water swelling body, store the springed water in the container, and as a water intake device, It can also be used as an alternative to the pot stage.

  This device can be easily installed at the water leakage point and does not require many personnel or materials, but also in this device, the ground can be sealed with the water swelling body between the bottom of the container Must be flat to the extent.

  In particular, when water flows out to the ground by piping and flows through the ground, the ground is eroded in a short time by the flowing water to form erosion grooves. For this reason, even in the above-described pot stage work, lunar wheel works, and also in the water intake device, the water flowing through the erosion grooves cannot be stopped, and it is extremely difficult to reliably prevent piping.

Japanese Patent Application Laid-Open No. 2008-115634

http://www.cgr.mlit.go.jp/ctc/tech_dev/topics/suibou/s_syurui09.htm

  The present invention has been made in view of such circumstances, and does not require a large amount of personnel or materials, and can prevent water leakage due to piping in a short time with a small number of people, It is intended to provide a method.

  Thus, the apparatus of the present invention includes a water storage tank having a water intake port formed on the bottom surface, an annular packing provided on the upper surface around the water intake port on the bottom surface, and the packing and the water intake port of the water storage tank. And a pipe driven into the ground, and the packing is pressed against the bottom surface of the water storage tank by pressing means.

  In the present invention, a container having a bottom surface with a water intake port and a peripheral wall surface standing on the periphery thereof can be used as the water storage tank. In this case, it is preferable that the container is made of a watertight cloth having a flexible bottom surface at least.

  Further, in the present invention, the water storage tank is composed of an annular dyke formed around the water leakage location, a watertight sheet developed on the ground surrounded by the annular dam and the annular levee, and the sheet. It is also possible that the water intake is formed at the same time. In this case, it is preferable that the annular bank is formed by stacking sandbags in an annular shape.

  Further, the water storage tank in the present invention is composed of a frame installed around the water leakage location and a water-tight sheet having the water intake port developed on the water leakage location, and the frame is lifted to raise the peripheral edge of the sheet. It is also preferable that the sheet is formed in a container shape capable of storing water.

  Moreover, as the packing in the present invention, it is preferable to use a water-swelled body obtained by enclosing a water-swellable resin powder in a water-permeable annular bag. Moreover, it is preferable to form a cutter blade at the tip of the pipe in the present invention.

  In the present invention, as the pressing means for pressing the packing against the bottom surface of the water storage tank, a sandbag can be placed on the packing. In this case, an annular presser plate can be placed on the packing, and the sandbag can be placed on the presser plate. Further, an annular pressing plate made of a material having a large specific gravity can be placed on the packing to serve as a pressing means.

  Further, as the pressing means in the present invention, it consists of a pressing plate placed on the packing and a flange formed on the upper end of the pipe, and the flange presses the pressing plate by driving the pipe into the ground, A packing may be sandwiched between the pressing plate and the bottom surface of the water storage tank.

  Furthermore, in the apparatus of this invention, it is preferable to provide the drain pipe which discharges | emits the water in a water tank in the upper part of the said water tank.

  Next, according to the method of the present invention, the water storage tank in the apparatus is installed on the ground so that the water intake coincides with the water leakage location, and an annular packing is placed on the upper surface around the water intake on the bottom surface of the water storage tank. The packing is pressed against the bottom surface of the water storage tank, and a pipe is driven into the ground through the packing and the water intake port of the water storage tank, and the water leaking from the water leakage point is stored in the water storage tank. To do.

  According to the present invention, since the pipe is driven around the water leakage portion and driven into the ground, even if there is an erosion groove as described above, the pipe blocks the erosion groove, and the water leaked from the water leakage portion leaks through the erosion groove. It can be reliably guided into the water tank.

  In addition, since the packing is pressed against and sealed around the water intake at the bottom of the water storage tank, it also seals between the pipe and the pipe, so that the water in the water storage tank does not flow backward from the water intake, and is securely stored in the water storage tank. Therefore, water leakage due to piping can be reliably suppressed by the water head pressure generated by the water.

Sectional drawing which shows typically the state which piping arises in a dike. Sectional drawing which shows one form of the state which implements this invention. Sectional drawing which shows the other form of the water storage tank of the state which implements this invention. Sectional drawing which shows the further another form of the water storage tank of the state which implements this invention. Sectional drawing of the principal part which shows the example which used the sandbag as the press means in this invention. Sectional drawing of the principal part which shows the example which uses the presser plate as a press means in this invention. Sectional drawing of the principal part which shows the example which formed the flange in the pipe as a press means in this invention. The water swelling body used as packing in this invention is shown, Comprising: (a) is a perspective view, (b) is a center longitudinal cross-sectional view, (c) is a center longitudinal cross-sectional view of the swollen state. Sectional drawing which shows the state of the Example of this invention.

  The present invention will be described below with reference to the drawings. FIG. 2 shows an embodiment of the present invention. Reference numeral 6 denotes a water leakage site that leaks through the water channel 5, and a sandbag 7 is stacked around the water leakage site 6 to form an annular dam 8, and the ring dam 8 and the ground surface surrounded by the annular dam 8 are It is covered with a watertight sheet 9 to form a water storage tank. And the water intake 10 is formed in the position corresponding to the said water leak location 6 in the sheet | seat 9. As shown in FIG.

  In this example, the annular levee 8 is formed with a structure similar to that of a conventional pot-stage work, but the structure of the annular dam 8 is not limited to this, and the annular dam 8 is formed by a structure such as embankment or masonry. It is also possible to do. Moreover, as long as the periphery of the sheet 9 can be reliably supported in a state where water is stored in the annular levee 8, it may be formed in an annular shape by collecting nearby tree branches and the like.

  An annular packing 11 is placed on the upper surface of the seat 9 around the water intake 10. Although the packing 11 may be made of a normal flexible elastic body, it is preferable to use a water swelling body 12 as shown in FIG.

  As shown in FIGS. 8A and 8B, the water-swelling body 12 is obtained by enclosing a water-swelling resin powder 14 in an annular bag 13 made of water-permeable paper or cloth. When this comes into contact with water, the water-swellable resin powder 14 swells and gels, and the volume rapidly increases as shown in FIG. 8 (c).

  A presser plate 15 is placed on the packing 11 as a pressing means, and the sandbag 7 is placed on the presser plate 15, and the packing 11 is taken in via the presser plate 15 by the weight of the sandbag 7. The sheet 9 around the mouth 10 is pressed and brought into close contact with the upper surface of the sheet 9.

  Further, by using the water swelling body 12 as the packing 11, the water swelling body 12 increases the volume and presses the sheet 9 against the ground. Therefore, even if there are some irregularities on the ground, the sheet 9 follows the irregularities. It is possible to effectively prevent the water from leaking between the sheet 9 and the ground by being in close contact with the ground.

  Thus, in the present invention, the pipe 16 is driven into the ground through the presser plate 15, the packing 11 and the water intake 10 of the sheet 9. A cutter blade 17 is preferably formed at the tip of the pipe 16 as shown in the drawing.

  When the pipe 16 is driven into the ground surrounding the water leaking portion 6 and there is severe unevenness on the ground or the erosion groove as described above is formed, and the lower surface of the sheet 9 is difficult to follow the ground. However, since the pipe 16 blocks irregularities such as the erosion grooves, the water leaked from the water leakage location 6 does not flow under the sheet 9 but is reliably stored on the sheet 9.

  Further, by forming the cutter blade 17 at the tip of the pipe 16 as described above, it is possible to cut deeply by cutting the ground grass, the grass in the ground or the root of the tree, and the new through the pipe 16 through the grass etc. To prevent the formation of water.

  Reference numeral 18 denotes a drainage pipe installed at the upper end portion of the annular dam 8, and the water stored in the annular dam 8 is discharged through the drainage pipe 18 to an appropriate external location. Although this drain pipe 18 is not necessarily indispensable, it is preferable that the drain pipe 18 is discharged to a location specified by the drain pipe 18 so that the water overflowing from the annular bank 8 does not erode the surrounding ground.

  According to this example, the overall structure is almost the same as that of a conventional pot step having an annular bank 8 around, but the packing 11 is sandwiched between the presser plate 15 and the sheet 9 and water leakage occurs. Since the pipe 16 is driven around the location 6, the water leaked from the water leakage location 6 causes the packing 11 to swell and greatly increase the volume, thereby securely sealing between the presser plate 15 and the sheet 9.

  Accordingly, even when the ground is not smooth, such as when an erosion groove is formed by water flowing out from the water leaking place 6 before construction, the water flowing out from the water leaking place 6 surely overflows on the seat 9 and the sheet 9 and the ground. And water on the sheet 9 does not flow back under the sheet 9.

  Accordingly, the water flowing out from the water leakage place 6 is reliably stored on the sheet 9 in the annular levee 8, and pressure is applied from the water leakage place 6 to the water channel 5 by the head pressure of the water stored there, and the water leakage place 6 Therefore, the outflow of water from the water channel 5 can be suppressed, the water flow in the water channel 5 can be suppressed, and the water channel 5 can be prevented from being drilled to prevent piping.

  In general, when water head pressure is applied to the water leakage location 6, it is said that the water depth is about 50 cm and there is a sufficient anti-piping effect, and according to the present invention, by reliably preventing outflow under the seat 9, A sufficient amount of water can be stored in the sheet 9 to ensure a water depth of about 50 cm.

  Further, a sheet 9 is placed on the ground in the annular dam 8, and the sheet 9 is pressed against the ground by the head pressure of water stored on the sheet 9, so that the outflow from the water leakage place 6 is prevented. Even when the blocked water is about to leak from a weak spot in the vicinity thereof, the leakage is suppressed by the water head pressure acting on the ground via the seat 9, and new piping does not occur.

  Next, FIG. 3 shows another embodiment in which the present invention is implemented. Reference numeral 19 denotes a container constituting a water storage tank placed on the ground, and includes a bottom surface 20 having a water intake port 10 and a peripheral wall surface 21 erected on the periphery of the bottom surface 20. Twenty water intakes 10 are placed on the ground so as to coincide with the water leak location 6.

  The container 19 may be made of metal or the like, but is preferably made of a flexible watertight fabric. It is preferable that at least the bottom surface 20 is a fabric having such a degree of flexibility that it can be in close contact with the ground by the pressure of water inside.

  Even if the peripheral wall surface 21 is a flexible fabric, the outward pressure acts on the peripheral wall surface 21 due to the water head pressure of water stored inside, and the peripheral wall surface 21 stands up due to the pressure and some rigidity of the fabric itself. And it becomes a state like a cloth bucket and water can be stored inside.

  The size of the container 19 is theoretically only required to be able to store water on the pipe 16 which will be described later so that the necessary head pressure can act. However, as described above, the leakage from the water leakage point 6 is prevented. Since the blocked water may leak from the nearby ground and cause new piping, pressure acts on the ground via the bottom surface 20 over a considerably wide area around the water leakage point 6. The diameter of the container 19 is at least 1 m, preferably 2 m or more.

  In this example, as in the previous example, the annular packing 11 is placed on the bottom surface 20 of the container 19 around the water intake 10, and the annular holding plate 15 is placed on the packing 11. The sandbag 7 is placed on the presser plate 15. A pipe 16 is driven into the ground around the water leaking portion 6 through the presser plate 15, the packing 11 and the water intake 10.

  According to this example, by configuring the container 19 with a flexible fabric, the container 19 can be folded and stored in a compact manner, and materials such as the container 19 can be quickly brought to the site when piping occurs due to increased river water.

  Then, the container 19 is installed so that the water inlet 10 coincides with the water leakage place 6, and the work is completed only by attaching the packing 11, the holding plate 15, the sandbag 7 and the pipe 16 around the water inlet 10, and the number of people is small and short. Piping prevention measures can be taken in time.

  If water overflows from the water leakage point 6 onto the bottom surface 20, the peripheral wall surface 21 rises due to the pressure of the water, and the container 19 is formed in the interior by raising it manually as necessary. Water is stored, and leakage of water through the water path 5 is suppressed by the water head pressure.

  Also in this example, as in the previous example, the packing 11 is sandwiched between the presser plate 15 and the bottom surface 20, and the pipe portion 15 of the pipe 16 is driven so as to surround the water leakage place 6. Even if the ground surface is not smooth, such as when an erosion groove is formed by water flowing out from the water leaking place 6 before construction, the water flowing out from the water leaking place 6 surely overflows into the container 19, and the bottom surface 20 and the ground. The water in the container 19 does not flow back under the bottom surface 20.

  Therefore, the water flowing out from the water leakage place 6 is reliably stored in the container 19, and the pressure from the water leakage place 6 into the water channel 5 is applied by the head pressure of the water stored there, and the water outflow from the water leakage place 6 Therefore, it is possible to suppress the water flow in the water channel 5 and to prevent the water channel 5 from being excavated to prevent piping. Also in this example, the depth of water stored in the container 19 is sufficient to be about 50 cm.

  In addition, since at least the bottom surface 20 of the container 19 is made of a flexible fabric, the bottom surface 20 is pressed against the ground by the head pressure of water stored in the container 19. However, even if it is going to leak from a weak spot in the vicinity, the leakage is suppressed by the hydraulic head pressure acting on the ground via the bottom surface 20, and no new piping is generated.

  Next, FIG. 4 shows still another embodiment of the state for carrying out the present invention. A frame 24 composed of a pile 22 and a cross rail 23 is formed so as to surround the water leaking portion 6 with an interval, and a watertight sheet 9 is developed on the ground inside the frame 24, and the periphery of the sheet 9 Is suspended from the frame 24 by a string 25 or the like to form a water storage tank, and a water intake 10 is formed in the central portion of the sheet 9 so as to coincide with the water leakage location 6.

  Also in this example, similarly to the previous example, the annular packing 11 is placed on the sheet 9 around the water intake 10, the annular holding plate 15 is placed on the packing 11, and the holding plate 15 A pipe 16 is driven into the ground around the water leakage point 6 through the packing 11 and the water intake 10.

  According to this example, the seat 9 is flexible and can be easily folded, and the frame 24 is a combination of elongated bars and does not take up space, and these materials can be stored compactly, When piping occurs due to increased water in the river, these materials can be quickly brought to the site for construction.

  Then, piles 22 are driven into the ground around the water leaking place 6, the crosspieces 23 are joined to form a frame 24, and the sheet 9 is placed on the ground inside the frame 24 so that the water intake 10 coincides with the water leaking place 6. Expand. As in the previous example, the packing 11, the holding plate 15 and the pipe 16 are attached around the water intake 10, the work is completed by lifting the periphery of the seat 9 and supporting it on the frame 24 with a string 25 or the like. In addition, the piping prevention treatment can be performed in a short time.

  And the water which overflowed on the sheet | seat 9 from the water leak location 6 is stored on the sheet | seat 9 which was supported by the flame | frame 24 at the periphery and became container shape. If necessary, it is possible to obtain a sufficient water depth on the sheet 9 to prevent piping by re-supporting the sheet 9 on the frame 24 if necessary while confirming the storage state.

  Also in this example, as in the previous example, the packing 11 is sandwiched between the presser plate 15 and the sheet 9, and the pipe portion 15 of the pipe 16 is driven around the water leakage place 6, Even when the ground is not smooth, such as when an erosion groove is formed by water flowing out from the water leaking place 6 before construction, the water flowing out from the water leaking place 6 surely overflows on the sheet 9, and the sheet 9 and the ground The water on the sheet 9 does not flow back down.

  Therefore, the water flowing out from the water leakage place 6 is reliably stored on the seat 9, and the water head 5 pressure is applied from the water leakage place 6 to the water channel 5, and the water outflow from the water leakage place 6 is performed. Therefore, it is possible to suppress the water flow in the water channel 5 and to prevent the water channel 5 from being excavated to prevent piping. Also in this example, the depth of the water stored on the sheet 9 is sufficient to be about 50 cm.

  In addition, since the sheet 9 is pressed against the ground by the head pressure of the water stored on the sheet 9, even when the water that is prevented from flowing out from the leaking point 6 tries to leak out from a weak point nearby, Further, the leakage is suppressed by the hydraulic head pressure acting through the seat 9, and no new piping is generated.

  Further, according to this example, the present invention can also be applied to an inclined ground. In the example of FIG. 2, the annular levee 8 is formed. Therefore, when the ground is inclined, a sufficient head pressure can be applied to the water leakage location 6 unless the height of the lower levee is increased. If the height of the bank cannot be increased, the water pressure will increase accordingly. Therefore, it is necessary to increase the width of the bank, and the formation of the ring bank 8 requires more personnel and materials. .

  Further, in the example of FIG. 3, it is possible to take a very simple preventive measure at a place where piping has occurred, but on the other hand, the ground in the area where the container 19 is installed needs to be flat, especially when the ground is inclined. Since water pressure is applied to the lower side of the slope, the peripheral wall surface 21 cannot withstand the water pressure, and the container 19 may collapse.

  However, according to the example of FIG. 4, since the periphery of the seat 9 is supported by the frame 24, when the ground is inclined, the lower periphery of the inclination is supported at a higher position of the frame 24. A sufficient water head pressure can be applied to the water leakage location 6 and the stored water does not flow out as long as the strength of the seat 9 and the frame 24 allows.

  In the present invention, it is necessary to press the packing 11 placed around the water intake port 10 with a pressing means and press the packing 11 against the sheet 9 or the bottom surface 20. In each of the above examples, the pressing plate 15 and the sandbag 7 are used as the pressing means, but the pressing means is not limited to this.

  FIG. 5 shows an example in which only the sandbag 7 is used as the pressing means. That is, the packing 11 is placed around the water intake 10, and the sandbag 7 is placed directly on the packing 11. In the case where there is a step on the ground, it is difficult for the packing 11 to follow along the portion where the step is low by placing the presser plate 15. Therefore, by placing the sandbag 7 directly on the packing 11, It becomes easy for the packing 11 to follow along irregularities such as steps.

  FIG. 6 shows an example in which only the presser plate 15 is used as the pressing means. When there is no unevenness on the ground, an annular pressing plate 15 made of a material such as a metal having a sufficiently large specific gravity is placed on the packing 11 so that the packing 11 is pressed against the ground via the sheet 9 or the bottom surface 20. be able to.

  FIG. 7 shows an example in which the pipe 16 also serves as a pressing means. That is, the pipe 16 has a flange 26 formed at the upper end thereof. The presser plate 15 is placed on the packing 11, and the pipe 16 is driven through the packing 11, the presser plate 15 and the water intake 10. The 16 flanges 26 press the pressing plate 15, and the packing 11 is sandwiched between the pressing plate 15 and the sheet 9 or the bottom surface 20. Further, the sandbag 7 can be placed on the presser plate 15.

  These pressing means and packing 11 may be appropriately used depending on the state of the ground around the water leakage place 6 and the like. That is, it is preferable to prepare various packings 11, pipes 16, presser plates 15, sandbags 7, etc. together with the material of the water tank, and use the most appropriate one according to the ground conditions at the site.

  In order to confirm the effect of the present invention, the ground shown in FIG. 9 was constructed. That is, a wooden frame 28 is installed on the floor 27 of the concrete pool, and a loam layer 29, a river sand layer 30 and a loam layer 31 are stacked in that frame 28 from the bottom, and a mountain is formed on the loam layer 31. The dam body 32 and the inclined surface 33 were constructed with sand. The front end of the river sand layer 30 was closed with the loam 34 and the rear end was communicated with the frame body 28. The dimensions of each part are as shown in the drawings.

  That is, the dam body 32 is constructed on the foundation ground in a state where the water-permeable river sand layer 30 is sandwiched between the water-impermeable loam layers 29 and 31, and the frame body 28 is assumed to be a river. It is assumed that a water channel is formed in the river sand layer 30.

  Then, a hole 35 having a diameter of 20 cm was excavated at a position where the height from the upper surface of the loam layer 31 on the inclined surface 33 was 45 cm, and the tip of the hole 35 was brought to approximately the middle of the thickness of the loam layer 31. .

  In this state, water was injected from the water storage tank 36 from the upper end of the rear frame body 28, and the water level in the frame body 28 was maintained at the upper end of the dam body 32. The water injected thereby penetrates into the river sand layer 30 from the frame body 28, causing boiling as a precursor of piping at the bottom of the hole 35, further destroying the loam layer 31, causing piping, and water from the hole 35. Outflowed and flowed down the inclined surface 33, and several minutes later, erosion grooves were formed in the inclined surface 33.

  In this state, the leakage prevention method shown in FIG. 4 was carried out. That is, the sheet 9 having the water intake 10 formed on the inclined surface 33 was developed, the packing 11 and the holding plate 15 were placed around the water intake 10 of the sheet 9, and the pipe 16 was driven into the inclined surface 33. As the sheet 9, a base cloth coated with a resin was used. By driving the pipe 16, the water that had been flowing under the sheet 9 along the erosion groove until now flows out onto the sheet 9.

  Next, the stake 22 is driven around the inclined surface 33 by surrounding the hole 35, and the frame 24 is formed by connecting the crosspieces 23. The periphery of the sheet 9 is pulled up and suspended by the string 25 on the upper part of the frame 24. The water was stored in it. Two people were required to carry out the method, and the time was about 23 minutes.

6 Water Leakage Location 7 Sandbag 8 Circular Dike 9 Sheet 10 Water Intake 11 Packing 12 Water Swelling Body 13 Bag 14 Water Swellable Resin Powder 15 Presser Plate 16 Pipe 17 Cutter Blade 18 Drainage Pipe 19 Container 20 Bottom 21 Circumferential Wall 24 Frame 26 Flange

Claims (14)

A water storage tank having a water intake port (10) formed in the bottom surface, an annular packing (11) provided on the top surface of the water intake port (10) on the bottom surface, and the water intake port of the packing (11) and the water storage tank And a pipe (16) driven through the ground through (10), wherein the packing (11) is pressed against the bottom surface of the water storage tank by a pressing means. The said water tank is a container (19) which consists of the bottom face (20) which pierced the water intake (10), and the surrounding wall surface (21) standingly arranged in the periphery, The Claim (1) characterized by the above-mentioned. Levee leakage control device The leakage prevention device for a levee according to claim 2, characterized in that the container (19) is made of a watertight fabric having at least a bottom surface (20) flexible. An annular levee (8) formed around the leakage point (6), and a water-tight sheet developed on the ground surrounded by the annular dam (8) and the annular dam (8). The leakage prevention device for a levee according to claim 1, wherein the water intake (10) is formed in the sheet (9). The leakage prevention device for a levee according to claim 4, wherein the annular levee (8) is formed by laminating sandbags (7) in an annular shape. The water storage tank is composed of a frame (24) installed around the water leakage location (6) and a watertight sheet (9) having the water intake (10) developed on the water leakage location (6). The levee according to claim 1, characterized in that the peripheral edge of the sheet (9) is pulled up and supported by the frame (24) to form the sheet (9) in a container shape capable of storing water. Leakage prevention device The said packing (11) is a water swelling body (12) formed by enclosing the water-swellable resin powder (14) in the water-permeable annular bag (16). Levee leakage prevention device according to any one of 6 The leakage prevention device for a levee according to any one of claims 1 to 7, wherein a cutter blade (17) is formed at a tip of the pipe (16). The leakage prevention device for a levee according to any one of claims 1 to 8, wherein the pressing means is a sandbag (7) placed on a packing (11). The embankment according to claim 9, wherein an annular presser plate (12) is placed on the packing (11), and the sandbag (7) is placed on the presser plate (12). Water leakage suppression device The embankment according to any one of claims 1 to 8, characterized in that the pressing means is an annular presser plate (12) made of a material having a large specific gravity and placed on the packing (11). Water leakage suppression device The pressing means includes a holding plate (12) placed on the packing (11) and a flange (26) formed at the upper end of the pipe (16), and drives the pipe (16) into the ground. Thus, the flange (26) presses the presser plate (12), and the packing (11) is sandwiched between the presser plate (12) and the bottom surface of the water tank. Levee leakage prevention device according to any one of 1 to 8 The leakage prevention device for a levee according to any one of claims 1 to 12, wherein a drain pipe (18) for discharging water in the water tank is provided at an upper part of the water tank. The water storage tank in the bank leakage prevention apparatus according to any one of claims 1 to 12 is installed on the ground such that the water intake (10) coincides with the water leakage location (6), and An annular packing (11) is placed on the peripheral upper surface of the water intake (10), and the packing (11) is brought into pressure contact with the bottom surface of the water storage tank so that the packing (11) and the water intake (10) of the water storage tank are placed. A water leakage control method for a levee characterized in that a pipe (16) is driven through the ground and the water leaked from the water leakage location (6) is stored in a water storage tank.

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