JP2007315088A - Rainwater permeating basin forming construction method of existing rainwater basin, existing rainwater basin processing apparatus and rainwater permeating basin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rainwater permeating basin forming construction method of an existing rainwater basin, capable of inexpensively and quickly constructing a rainwater permeating basin, by processing the existing rainwater basin. <P>SOLUTION: A bottomed cylindrical basin body 12 constituting the existing rainwater basin 10, is processed in a state of being still buried in the ground, and a through-hole 24 is formed in its bottom part. A permeating member storage hole 26 is formed by excavating earth existing in a lower part of the through-hole 24. The existing rainwater basin 10 is altered into the rainwater permeating basin 11, by arranging a porous permeating member 13 in its permeating member storage hole 26. The permeating member 13 comprises a pipe 31 having a plurality of through-holes 33 on a peripheral surface, and a permeable strainer 32 having a plurality of pores 34 finer than the plurality of through-holes 33 and insertably-extractably arranged in the pipe 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rainwater infiltration hatching method for an existing rainwater tank that processes an existing rainwater tank into a rainwater infiltration tank, an existing rainwater tank processing apparatus, and a rainwater infiltration tank.

  In urban areas, urbanization is progressing like a concrete jungle, and the ground surface is paved with concrete and asphalt. As a result, the infiltration area of rainwater has decreased, and the amount of runoff from the ground surface by rainwater has increased. Therefore, a heavy load is applied to drainage facilities such as rainwater pipes during heavy rain, causing urban flooding. In addition, the maintenance of sewage pipes and rainwater pipes prevents rainwater from penetrating into the ground, reducing the amount of groundwater flowing into rivers. As a result, the natural purification capacity of the river is being lost, which causes water pollution of the river.

  As a countermeasure, a rainwater infiltration dredging that penetrates rainwater that has fallen on paved roads such as roads and parking lots into the ground has been developed and installed in the side grooves of roads and parking lots. In areas where rivers and lakes need to be purified, it is recommended by local governments to install rainwater infiltration basins in order to infiltrate rainwater that has fallen on the roof, etc., into the ground within each household premises. The spread of rainwater infiltrates has been achieved by providing subsidies for the installation of infiltrates.

  As described above, for example, Patent Documents 1 and 2 disclose a rainwater infiltration tub that allows rainwater to penetrate into the ground. In the penetrating rod of Patent Document 1, a mark line is provided on the bottom of the bag main body, and the penetrating hole having a size suitable for the construction site is formed using the mark line as a mark. Further, in the penetrating rod of Patent Document 2, a plurality of concave portions that can be knocked out are provided on the side wall side of the rod body. By selectively knocking out the concave portion, a penetration hole having a size suitable for the construction site is formed.

Furthermore, for example, Patent Document 3 discloses a sewage basin that allows sewage such as domestic wastewater to penetrate underground. This sewage basin has a culm body that accumulates sewage, and a hollow pipe that is inserted into the ground below the cradle body, and is configured to infiltrate the sewage accumulated in the sag body into the ground through the hollow pipe. ing.
JP-A-8-319657 Japanese Patent Laid-Open No. 2002-21170 JP 2000-189985 A

  By the way, in a conventional urban area, a large number of rainwater reeds are provided with no penetration hole in the reed body. In order to avoid urban flooding and purify rivers, when replacing these rainwater tanks with the penetrating tanks of Patent Documents 1 and 2, remove the existing rainwater tanks from the ground of the paved road and install new penetrating tanks. Therefore, the replacement cost increases. Also, considering the current situation of installation of penetrating dredging as part of road repair / renovation work, the number of penetrating dredging is limited, so the cost of manufacturing penetrating dredging also increases.

  Incidentally, when newly installing a sewage tank like patent document 3, it is necessary to embed a hollow pipe in the ground using heavy machinery, such as a power shovel, and installation cost will increase. Furthermore, if the hollow pipe is clogged with dust etc., the penetration capacity will be reduced, but since the hollow pipe is inserted deep into the ground, it is difficult to remove the clog by removing the hollow pipe. is there. Moreover, the wastewater flowing into the sewage basin cannot normally be discharged into the river as it is, and it is inherently inappropriate to permeate the sewage into the ground as in Patent Document 3.

  The present invention has been made in view of the above-mentioned problems, and its purpose is to process an existing rainwater tank and to stormwater infiltration hatching of an existing rainwater tank that can be quickly constructed at low cost. To provide a law. Another object is to provide an existing rainwater trough processing apparatus suitable for use in a rainwater infiltration hatching method for existing rainwater troughs. Another object of the present invention is to provide a rainwater infiltration tank that can process an existing rainwater tank and discharge more rainwater.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a method of processing an existing rainwater tank buried in the ground and modifying it into a rainwater infiltration tank, which comprises the bottomed bottom that constitutes the existing rainwater tank Processing the cylindrical rod body as it is embedded in the ground, forming a through hole in the bottom of the tube, and a penetrating member disposing step of disposing a porous penetrating member in the vicinity of the through hole The gist of this is the rainwater infiltration hatching method for existing rainwater tanks.

  According to the first aspect of the present invention, in the drilling step, a through hole is formed in the bottom of the main body of the existing rainwater tank with the main body of the existing rainwater tank buried in the ground. In the penetrating member disposing step, a porous penetrating member is disposed in the vicinity of the through hole. In this way, it is possible to modify the rainwater tank into a rainwater infiltration tank without digging up the existing rainwater tank from the ground. Therefore, compared with the case where it replaces with a new rainwater infiltration rod, a rainwater infiltration rod can be constructed easily and rapidly, and the construction cost can be suppressed to half or less.

  According to a second aspect of the present invention, in the first aspect, in the drilling step, the soil below the through hole is excavated to form a penetrating member accommodation hole, and in the penetrating member disposing step, the penetrating member is formed. The gist thereof is to dispose the penetrating member in the accommodation hole.

  According to the second aspect of the present invention, since the penetrating member is disposed so as to protrude downward from the bottom of the main body, it is possible to sufficiently secure the rainwater infiltration area as compared with the case where only the through hole is provided. can do. Moreover, since rainwater collects in the bottom part of the main body, rainwater can be efficiently infiltrated into the ground from the infiltration member through the through hole.

  According to a third aspect of the present invention, in the second aspect, the penetrating member includes a cylindrical body having a plurality of through holes on a peripheral surface, and a plurality of fine pores smaller than the plurality of through holes. And a penetrating filter material that is detachably inserted into the body. In the penetrating member disposing step, the tubular member is disposed vertically in the penetrating member receiving hole, The gist is to insert and arrange the filter material.

  According to invention of Claim 3, a cylinder is arrange | positioned vertically in the penetration member accommodation hole formed under the through-hole, and a permeable filter material is inserted in the inside of the cylinder. A porous penetrating member made of a cylinder and a filter material is mounted below the through hole. Since this permeation member has a plurality of through holes on the peripheral surface of the cylindrical body, a sufficient permeation area of rainwater can be secured. Further, by providing a filter material having a plurality of fine pores smaller than the through holes of the cylinder in the cylinder, it is possible to prevent dust (gravel, leaves, etc.) contained in rainwater from entering the cylinder. . Therefore, it is possible to suppress a decrease in rainwater permeation ability due to clogging of the through holes of the cylindrical body. Further, in this penetrating member, since the cylindrical body is arranged vertically, the filter material can be easily attached and detached through the through hole at the bottom of the bag main body, and the maintenance work can be quickly performed.

  The invention according to claim 4 is an apparatus used when an existing rainwater tank buried in the ground is processed and converted into a rainwater infiltration tank, and a main body frame and a drive device supported by the main body frame A rotating cutting tool that is attached to the tip of the rotating shaft of the driving device and that forms a through hole in the bottom of the dredge main body, and is in contact with the inner side surface of the existing rainwater dredging to drive the driving device. The gist of the existing rainwater drainage processing apparatus is provided with a rotation shaft shake prevention means for preventing the rotation shaft from shaking in the above.

  According to the fourth aspect of the present invention, the driving device is supported on the main body frame, and the rotating shaft is rotationally driven by the driving device. Further, the rotation shaft shake preventing means abuts against the inner side surface of the existing rainwater tank, so that the rotation shaft is prevented from being shaken when the drive device is driven. For this reason, the through-hole can be accurately formed in the bottom portion of the rod main body by the cutting tool attached to the tip of the rotating shaft. Moreover, according to the processing apparatus having such a configuration, even if the existing rainwater trough is made of concrete, for example, it is possible to form a desired through hole without causing damage to the bottom of the spear body.

  According to a fifth aspect of the present invention, in the fourth aspect, the rotation shaft shake preventing means includes a plurality of arm portions that are extendable in a plurality of directions orthogonal to the rotation shaft, and an expansion amount of each arm portion. The gist of the present invention is to have an adjustment portion for adjusting the angle.

  According to the fifth aspect of the present invention, by extending the plurality of arm portions of the rotating shaft anti-shake means in a plurality of directions orthogonal to the rotating shaft, the tips of the respective arm portions are brought into contact with the corner portions of the bag body. Can be made. Therefore, the rotating shaft can be supported and fixed at a plurality of points. Even if the size of the heel body is different, if the expansion / contraction amount of the plurality of arm portions is adjusted by the adjusting portion, the tip of each arm portion can be brought into contact with the heel body reliably. Therefore, by using this rotation shaft shake preventing means, the rotation shaft is reliably prevented from being shaken, so that the through hole can be accurately formed at a predetermined position in the bottom portion of the bag body.

  The invention according to claim 6 is a rainwater permeation trough formed by processing an existing rainwater trough buried in the ground, and has a bottomed cylindrical trough main body with a through hole formed in the bottom, A drainage pipe provided on the side wall of the main body and connected to the rainwater main pipe, a cylinder having a plurality of through holes on the peripheral surface, and a plurality of fine pores smaller than the plurality of through holes, And a permeable filter material arranged so as to be insertable / removable, and the cylinder is vertically arranged in a penetration member receiving hole below the through hole, and the cylinder The gist of the present invention is a rainwater infiltration trough characterized in that the filter material is inserted and arranged in the body.

  According to the sixth aspect of the present invention, a part of rainwater discharged from the discharge pipe to the rainwater main in the existing rainwater tank can be infiltrated into the ground through the penetration member from the bottom through hole of the main body. it can. Therefore, more rainwater can be discharged by using the rainwater infiltration tank of the present invention. Since the permeation member attached to the rainwater permeation trough has a plurality of through holes on the peripheral surface of the cylindrical body, a sufficient permeation area of rainwater can be secured. Further, by providing a filter material having a plurality of fine pores smaller than the through holes of the cylinder in the cylinder, it is possible to prevent dust (gravel, leaves, etc.) contained in rainwater from entering the cylinder. . Therefore, it is possible to suppress a decrease in rainwater permeation ability due to clogging of the through holes of the cylindrical body. Further, in this penetrating member, since the cylindrical body is arranged vertically, the filter material can be easily attached and detached through the through hole at the bottom of the bag main body, and the maintenance work can be quickly performed.

  As described in detail above, according to the first to third aspects of the present invention, a rainwater infiltration hatching method for an existing rainwater tank that can process an existing rainwater tank and construct a rainwater infiltration tank quickly at low cost. Can be provided. Moreover, according to invention of Claim 4 or 5, the existing rainwater tank processing apparatus suitable for using for the rainwater penetration hatching method of an existing rainwater tank can be provided. Furthermore, according to the invention described in claim 6, it is possible to provide a rainwater permeation dredge that can process an existing rainwater tank and discharge more rainwater.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the rainwater infiltrating rod 11 of the present embodiment is mounted on a concrete rod body 12 formed in a bottomed rectangular tube shape (square shape) and a bottom portion of the rod body 12. A penetrating member 13. The heel body 12 has a size of, for example, 30 cm in length and width and 90 cm in depth. In the present embodiment, the rod body 12 is illustrated as a square cylinder, but may be a cylinder other than a rectangle (for example, a cylinder or a hexagon). A discharge pipe 15 is provided on the side wall of the main body 12, and the discharge pipe 15 is connected to the rainwater main pipe 16. Specifically, the rainwater main 16 is provided in the center of the paved road, and the main body 12 is provided in the ground on the shoulders on both sides of the road. In addition, an insulator-like upper lid (grating lid) 22 is attached to the opening 21 at the top of the kite body 12, and rainwater that has fallen on the road surface flows into the kite body 12 from the gap of the grating lid 22 and is temporarily stored. It is done. The rainwater stored in the main body 12 is discharged to the downstream rainwater main 16 via the discharge pipe 15 and further flows to the river via the rainwater main 16.

  A circular through hole 24 is formed at the center of the bottom surface of the heel body 12. A penetrating member accommodation hole 26 having a circular cross section is formed by excavating soil 25 below the through hole 24, and the permeation member 13 is disposed in the penetration member accommodation hole 26. The penetrating member 13 includes a cylindrical pipe (cylindrical body) 31 made of a resin such as vinyl chloride, and a strainer 32 that can be inserted into and removed from the pipe 31. The pipe 31 has a size of, for example, a diameter of 20 cm and a length of 40 cm, and a plurality of through holes 33 of about 2 cm are formed on the peripheral surface thereof.

  The strainer 32 is a permeable filter material having a plurality of fine pores 34 smaller than the through-holes 33 and is formed in a cylindrical shape by winding resin fibers around the core rod 35. A thin metal plate 36 is fixed to both ends of the strainer 32 (core bar 35) so as to sandwich the resin fiber, and a hook 37 for attachment / detachment is attached to one metal plate 36 (upper in FIG. 1) of the strainer 32. Is provided. Here, the strainer 32 can be easily attached to and detached from the pipe 31 by hooking the hook 37 using a working bar or the like. Further, a plurality of through holes 38 are formed in the metal plate 36, and the diameter of the metal plate 36 is slightly smaller than the resin fiber portion. With this configuration, rainwater collected at the bottom of the main body 12 surely penetrates the strainer 32 along the inner wall surface of the pipe 31. The core bar 35 and the metal plate 36 of the strainer 32 are formed using a material that does not rust with rainwater, such as stainless steel.

  The rainwater seepage trough 11 of the present embodiment is formed by processing an existing rainwater trough 10 (see FIG. 2) embedded in the road shoulder. Below, the processing apparatus for changing the existing rainwater tank 10 into the rainwater infiltration tank 11 is demonstrated using FIG.3 and FIG.4. FIG. 3 is a side view of the processing apparatus 40, and FIG. 4 is a front view of the processing apparatus 40.

  As shown in FIGS. 3 and 4, the processing device 40 in the present embodiment includes a main body frame 41, an elevating device 42, a hydraulic motor 43 as a drive device, and a hydraulic unit 44.

  The main body frame 41 includes a base member 46 provided at the bottom thereof, and a frame-shaped guide frame 47 erected vertically from the base member 46. A wheel 48 for moving the main body frame 41 is provided at one end of the base member 46. In the vicinity of the wheel 48 in the base member 46, a horizontal adjustment mechanism 49 for keeping the main body frame 41 horizontal is provided. The horizontal adjustment mechanism 49 includes a bolt 51 that is screwed into a screw hole that passes through the base member 46, and a flat plate 52 that is fixed to the lower end portion of the bolt 51 and supports the main body frame 41. In this horizontal adjustment mechanism 49, by rotating the bolt 51, the protruding amount of the flat plate 52 with respect to the base member 46 is changed, and the level of the main body frame 41 is adjusted.

  The guide frame 47 is provided with a movable member 54 projecting to the front side thereof so as to be movable up and down. A drive chain 55 is provided on the back side of the guide frame 47 along the longitudinal direction (vertical direction) of the guide frame 47, and an operation handle 56 for raising and lowering the movable member 54 via the drive chain 55. Is provided. In the present embodiment, the elevating device 42 is configured by the movable member 54, the drive chain 55, and the operation handle 56. In the lifting device 42, the movable member 54 is raised by rotating the operation handle 56 forward, and the movable member 54 is lowered by rotating the operation handle 56 reversely.

  Further, the upper end portion of a support column 58 extending in the vertical direction is connected to the movable member 54, and the hydraulic motor 43 is provided at the lower end portion (tip portion) of the support column 58. The hydraulic motor 43 is connected to the hydraulic unit 44 via the high-pressure hose 61, and the rotating shaft 62 is driven to rotate when hydraulic oil having a predetermined pressure is supplied from the hydraulic unit 44. A circular concrete cutter (rotary cutting tool) 63 for cutting out concrete is fixed to the tip of the rotary shaft 62 in the hydraulic motor 43. In addition to the circular concrete cutter 63, a screw auger for excavating soil can be attached to the tip of the rotating shaft 62.

  In the present embodiment, a shaft runout prevention fitting 65 is provided in the middle of the column 58 that supports the hydraulic motor 43 as a rotating shaft shake preventing means for preventing the shaft runout. As shown in FIG. 5, the shaft runout prevention fitting 65 can be expanded and contracted in a plurality of directions (horizontal directions) orthogonal to the iron plate 66 having a through hole for inserting the support column 58 and the rotating shaft 62 of the hydraulic motor 43. And a plurality of arm portions 67 and an adjustment shaft 68 for adjusting the amount of expansion / contraction of each arm portion 67. In the shaft runout prevention metal fitting 65 of the present embodiment, four arm portions 67 are provided corresponding to the corner portions of the collar body 12 (see FIG. 6). Each arm portion 67 includes a contact member 70 and two joint members 71 whose tips are connected to the contact member 70.

  In the shaft runout prevention metal fitting 65, the iron plate 66 is fixed with long bolts and nuts, and the end portions of the adjustment shaft 68 are inserted into the respective hole portions 69 provided at the four corners of the iron plate 66. A worm is formed on the adjustment shaft 68, and a lower end portion of the adjustment shaft 68 is rotatably fixed via a bearing 73. The base end of the arm portion 67 (joint member 71) is fixed to the adjustment shaft 68. Specifically, one end (upward in FIG. 5) of the joint member 71 is fixed so as to be immovable in the axial direction, and the other end (downward in FIG. 5) of the end of the joint member 71 is fixed. The inner screw is formed and fixed so as to be movable in the axial direction while being fitted to the worm of the adjusting shaft 68. That is, by rotating the adjustment shaft 68, the base end of the lower joint member 71 moves in the vertical direction along the adjustment shaft 68. Here, when the adjustment shaft 68 is rotated and the base end of the lower joint member 71 is moved to the lowermost end portion, the joint member 71 becomes parallel to the axial direction, and the arm portion 67 (contact member 70) is inward. Fits in. 5 and FIG. 6, when the adjustment shaft 68 is rotated to move the base end of the lower joint member 71 upward, the joint member 71 gradually rises in the horizontal direction. The arm portion 67 (contact member 70) extends in a direction (horizontal direction) orthogonal to the rotation shaft 62.

  In the present embodiment, an adjustment knob 75 is provided at the upper end of each adjustment shaft 68 so that the operator can easily rotate the adjustment shaft 68 by turning the adjustment knob 75. It has become.

  Next, a rainwater infiltration hatching method for modifying the existing rainwater tank 10 into the rainwater infiltration tank 11 using the processing apparatus 40 of the present embodiment will be described.

  First, in the pre-processing preparation step, the grating lid 22 of the existing rainwater basket 10 is opened, and rainwater, mud, etc. in the main body 12 are removed using a vacuum cleaner for construction work. And after making the state which can confirm the bottom of the coffin main body 12, the processing apparatus 40 is arrange | positioned at the upper part of the coffin main body 12. FIG. At this time, in the base member 46 of the processing apparatus 40, the other end portion without the wheel 48 is placed on a convex portion (for example, a square member 53 shown in FIG. 3) disposed on the outer side of the rod main body 12. In this state, by adjusting the horizontal adjustment mechanism 49 on the wheel 48 side, the protrusion amount of the flat plate 52 is changed to keep the main body frame 41 horizontal.

  In the subsequent rotating shaft fixing step, the movable member 54 and the support column 58 are lowered by turning the operation handle 56 of the processing apparatus 40, and the shaft shake prevention metal fitting 65 and the hydraulic motor 43 provided on the support column 58 are placed inside the rod body 12. Arrange. In this state, the adjustment shaft 68 of the shaft shake prevention metal fitting 65 is turned to adjust the amount of expansion / contraction of each arm portion 67, thereby bringing the contact member 70 of each arm portion 67 into contact with the corner portion of the bag main body 12 ( (See FIG. 6). By this shaft runout prevention metal fitting 65, the rotating shaft 62 of the hydraulic motor 43 is fixed so as not to shake in the horizontal direction.

  Thereafter, in the drilling step, the hydraulic unit 44 is operated and hydraulic oil is supplied from the hydraulic unit 44 to the hydraulic motor 43, whereby the hydraulic motor 43 is driven to rotate the circular concrete cutter 63. At this time, the operation handle 56 of the processing apparatus 40 is turned to lower the hydraulic motor 43 through the movable member 54 and the support column 58. Then, as shown in FIG. 7A, the circular concrete cutter 63 is brought into contact with the bottom surface of the main body 12 and a predetermined force is applied to the circular concrete cutter 63 from above. As a result, as shown in FIG. 7B and FIG. 8A, the bottom surface of the bag main body 12 is cut to form a circular through hole 24. At this time, the cooling water is discharged to the cutting portion by the circular concrete cutter 63, and the frictional heat generated in the circular concrete cutter 63 is cooled.

  After the through hole 24 is formed, the rotation of the hydraulic motor 43 is temporarily stopped, and the circular concrete cutter 63 attached to the tip of the rotating shaft 62 is replaced with a screw auger. Thereafter, as shown in FIG. 7C, the hydraulic motor 43 is driven to rotate the screw auger 64, and the screw auger 64 excavates the soil 25 below the through hole 24 to penetrate the penetrating member accommodation hole. 26 is formed. At this time, the soil 25 excavated by the screw auger 64 is removed by a vacuum cleaner for construction work or the like. In addition, after the penetration member accommodation hole 26 is formed, the processing device 40 is moved from the upper part of the bag main body 12 to a position that does not get in the way.

  In the permeation member disposing step, as shown in FIGS. 7D and 8B, after the pipe 31 is disposed vertically in the permeation member accommodation hole 26, the permeation member disposition step shown in FIGS. As shown in c), a strainer 32 is inserted and arranged in the pipe 31. Thereby, the permeation member 13 is attached to the bottom of the heel body 12. Then, as shown in FIG. 1, by attaching the grating lid 22 to the upper part of the main body 12, the work for changing the existing rainwater tank 10 to the rainwater infiltration tank 11 is completed.

  Also, when maintaining the rainwater infiltrating rod 11 that has been used for a long time, after removing mud and dust accumulated at the bottom of the rod body 12, it is hooked on the hook 37 using a working bar or the like and the strainer 32 is connected to the pipe 31. Extract from. Then, the strainer 32 is washed with water to remove mud and the like accumulated therein, and then inserted into the pipe 31 again. In addition, you may replace | exchange for the new strainer 32 at the time of this maintenance. By performing such maintenance work, the infiltration capacity of the rainwater infiltration tank 11 is restored to the state at the time of construction.

  Therefore, according to the present embodiment, the following effects can be obtained.

  (1) In the case of this embodiment, the main body 12 of the existing rainwater tank 10 is processed while being buried in the ground, and a through hole 24 is formed at the bottom thereof, and the porous body is formed below the through hole 24. The permeation member 13 is disposed. In this way, the rainwater tank 10 can be modified to the rainwater infiltration tank 11 without digging up the existing rainwater tank 10 from the ground. Therefore, compared with the case where it replaces with a new rainwater penetration rod like the prior art, the rainwater penetration rod 11 can be constructed easily and quickly, and the construction cost can be suppressed to half or less.

  (2) In the rainwater infiltration rod 11 of the present embodiment, since the infiltration member 13 is disposed so as to protrude downward from the bottom surface of the rod body 12, it is compared with the rainwater infiltration rod in which only the through hole 24 is provided on the bottom surface. As a result, it is possible to secure a sufficient penetration area of rainwater. Moreover, since rainwater collects in the bottom part of the main body 12, rainwater can be efficiently permeated into the ground from the permeation member 13 through the through hole 24. Therefore, during heavy rain, the load on the rainwater main 16 can be reduced, and urban flooding can be prevented. Moreover, the rain water which fell on the pavement can be returned to the ground of the pavement, and the natural circulation of water can be subsidized.

  (3) Since the infiltration member 13 of the present embodiment has a plurality of through holes 33 on the peripheral surface of the pipe 31, it is possible to sufficiently ensure the infiltration area of rainwater. Further, by providing a strainer 32 having a plurality of fine holes 34 smaller than the through holes 33 of the pipe 31 in the pipe 31, dust (gravel, leaves, etc.) contained in rainwater is prevented from entering the pipe 31. be able to. Accordingly, it is possible to suppress a decrease in rainwater penetration capability due to clogging of the through holes 33 of the pipe 31. Further, in the penetrating member 13, the pipe 31 is arranged vertically, and a hook 37 is formed on the upper portion of the strainer 32 accommodated in the pipe 31. Therefore, the strainer 32 can be easily attached and detached through the through hole 24 at the bottom of the bag main body 12, and the maintenance work can be performed quickly.

  (4) In the rainwater infiltrating rod 11 of the present embodiment, since the through hole 24 is provided on the bottom surface of the rod main body 12, the through hole 24 is processed as compared with the case where the through hole 24 is provided on the side surface of the rod main body 12. It can be done easily. In addition, since one relatively large through hole 24 is provided on the bottom surface of the bag main body 12, processing is easier than when a plurality of through holes 24 are formed, and the through holes 24 are arranged in the through holes 24. Since only one penetrating member 13 is required, the penetrating member 13 (strainer 32) can be quickly replaced at low cost, which is practically preferable.

  (5) The rainwater infiltration rod 11 of the present embodiment is good because the circular through hole 24 is formed on the bottom surface of the rod body 12 and the columnar infiltration member 13 is mounted below the through hole 24. A good appearance.

  (6) In the processing apparatus 40 of the present embodiment, each arm portion 67 of the shaft runout prevention metal fitting 65 is brought into contact with the corner portion of the rod main body 12 to prevent the rotation shaft 62 from blurring. In this way, it is possible to reliably prevent blurring of the rotating shaft 62 without damaging the bag main body 12 and the surrounding road as in the case of fixing with anchor bolts, for example. Further, in the shaft runout prevention metal fitting 65, the amount of expansion / contraction of each arm portion 67 can be adjusted by turning an adjustment shaft 68 as an adjustment portion. Therefore, even when the size of the heel body 12 is different, the contact member of each arm portion 67 70 can be reliably brought into contact with the heel body 12. Therefore, it is possible to reliably prevent the rotation shaft 62 from being shaken, and to accurately form the through hole 24 in the bottom surface of the heel body 12.

  (7) Since the processing apparatus 40 according to the present embodiment can keep the main body frame 41 horizontal by the horizontal adjustment mechanism 49, the through hole 24 can be more accurately formed on the bottom surface of the bag main body 12.

  (8) In the processing apparatus 40 of the present embodiment, since the wheel 48 is provided on the base member 46 of the main body frame 41, the processing apparatus 40 conveyed by a car or the like can be easily moved to the work site on the roadside. Can do.

  (9) In the processing apparatus 40 of the present embodiment, since the hydraulic motor 43 is used as a drive device, it is not necessary to take measures against electric leakage due to rain water, cooling water, or the like as in the case of using an electric motor.

  In addition, you may change embodiment of this invention as follows.

  In the above embodiment, the penetrating member 13 is provided below the through hole 24 at the bottom of the heel body 12, but the penetrating member 81 may be provided in the through hole 24 as shown in FIG. As shown in FIG. 10, the penetrating member 82 may be disposed at the bottom of the heel body 12 so as to cover the upper portion of the through hole 24.

  In the above embodiment, the through hole 24 is formed on the bottom surface of the bag main body 12, but the through hole 24 may be provided on the side surface side of the bottom portion other than this. However, as in the above-described embodiment, forming the through hole 24 on the bottom surface of the bag main body 12 enables easier and faster processing.

  In the above embodiment, the 30 cm square rain water tank 10 having the same vertical and horizontal lengths is processed, but an elongated rain water tank 10 may be processed. In this case, a pseudo box 84 as shown in FIG. Specifically, the pseudo box 84 has a square opening 86 as in the case of the bag main body 12 of the above embodiment. By interposing the pseudo box 84 inside the bag main body 85, each arm portion 67 of the shaft shake preventing metal fitting 65 can be brought into contact with the corner portion of the pseudo box 84 with certainty. As a result, the rotation shaft 62 of the hydraulic motor 43 is fixed so as not to shake in the horizontal direction, and thus the through hole 24 can be formed in the bottom surface of the rod main body 85. The pseudo box 84 is fixed to the base member 46 of the main body frame 41 in a state of being interposed inside the bag main body 85. In this case, the pseudo-box 84 and the shaft shake prevention metal fitting 65 constitute a rotation shaft shake prevention means.

  In the above embodiment, the processing device 40 having the lifting device 42 on the main body frame 41 is embodied. However, a simple processing device 90 as shown in FIG. In this processing apparatus 90, a handle 91 is provided on the proximal end side of the support column 58, and a hydraulic motor 43 is provided on the distal end side of the support column 58. Further, in the middle of the column 58, a shaft runout prevention metal fitting 65 is provided in the same manner as in the above embodiment. In this processing apparatus 90, an operator works by holding the handle 91 by hand and applies a force from above the handle 91, whereby a downward pressing force acts on the circular concrete cutter 63 to process the through hole 24. It can be carried out.

  The processing apparatus 40 according to the above embodiment includes the shaft runout prevention metal fitting 65 for preventing the shaft runout of the rotating shaft 62. For example, when the collar body 12 is shallow, Since the shaft runout hardly occurs, the shaft runout prevention fitting 65 may be omitted.

  In the above embodiment, the shaft runout prevention bracket 65 is configured such that the operator adjusts the amount of expansion and contraction of the arm portion 67 by turning the adjustment shaft 68. However, the shaft runout prevention bracket 65 is automatically configured using an actuator such as a drive motor. You may comprise so that it can adjust to. However, if the actuator is provided, the configuration becomes complicated and the size is increased. Therefore, if the configuration is adjusted manually as in the above-described embodiment, the shaft shake prevention metal fitting 65 can be made compact, which is practically preferable. It will be a thing.

  The shaft shake prevention metal fitting 65 in the above embodiment is configured to support four points using the four arm portions 67, but the arm portion 67 is changed to a configuration such as two-point support or three-point support. May be.

  In the above embodiment, the through hole 24 is formed on the bottom surface of the ridge body 12 using the circular concrete cutter 63, but other cutting tools (for example, tools such as a hammer) may be used. Further, instead of the screw auger 64, the penetrating member accommodation hole 26 may be formed using a double scoop or the like. Further, the through hole 24 and the penetrating member accommodation hole 26 may be formed by using a rotary cutting tool in which a drill for excavation is placed inside the circular concrete cutter.

  In the processing apparatus 40 of the above embodiment, the hydraulic unit 44 and the vacuum cleaner are provided separately, but a processing apparatus having functions of the hydraulic unit 44 and the vacuum cleaner may be used. However, when the hydraulic unit 44 and the vacuum cleaner are provided separately from the processing device 40 as in the above embodiment, the processing device 40 can be downsized, and the processing device 40 can be easily installed in a narrow place such as a narrow road. Can be moved.

  In the above embodiment, the existing rainwater tank 10 embedded in the shoulder of the road is processed, but in addition to this, the existing rainwater tank 10 embedded in a paved place such as a parking lot or in the garden of each household. 10 may be processed to be changed to the rainwater permeation trough 11.

  In the above-described embodiment, the structure in which the strainer 32 that is a permeable filter material is disposed in the pipe 31 that is a cylindrical body is adopted, but the following modifications may be made. For example, instead of the strainer 32, a granular material such as crushed stone, glass ball, ceramic ball or the like is filled and arranged. The granular material is preferably finer than the plurality of through holes 33 provided in the pipe 31. Alternatively, only the pipe 31 may be installed and the strainer 32 may be omitted.

  In the above embodiment, the permeation member accommodation hole 26 having a circular cross section is formed, and the cylindrical pipe 31 is disposed therein, but the permeation member accommodation hole having a non-circular cross section (for example, a square shape) is formed, You may make it arrange | position the pipe of the same shape (in this case square shape) there.

  Next, in addition to the technical ideas described in the claims, the technical ideas grasped by the embodiments described above are listed below.

  (1) An existing rainwater drainage processing apparatus according to claim 4 or 5, further comprising a leveling mechanism for adjusting the level of the main body frame.

  (2) The existing rainwater drainage processing device according to claim 4 or 5, wherein a wheel for moving the main body frame is provided at the bottom of the main body frame.

  (3) The existing rainwater drainage processing device according to claim 4 or 5, wherein the rotary cutting tool and a rotary excavation tool for excavating earth and sand are provided at the tip of the rotary shaft in a replaceable manner.

  (4) The existing rainwater tank processing apparatus according to claim 4 or 5, further comprising an elevating device for moving the rotary cutting tool up and down.

  (5) The existing rainwater drainage processing device according to claim 4 or 5, wherein the driving device is a hydraulic motor driven by hydraulic pressure.

  (6) A rainwater permeation pad that is buried in the ground of a paved road and temporarily stores rainwater that has fallen on the paved road into the main body of the rainwater and discharges it to the rainwater main side, while allowing some of the rainwater to penetrate into the ground. A bottomed cylindrical gutter body having a through-hole formed in the bottom, a drain pipe provided on a side wall of the gutter body and connected to a rainwater main pipe, and a cylinder having a plurality of through holes in the peripheral surface And a penetrating member having a plurality of fine pores finer than the plurality of through holes, and a penetrating filter material disposed so as to be insertable / removable in the cylindrical body, the through hole A rainwater infiltration trough characterized in that the cylindrical body is disposed vertically in a permeation member accommodation hole below the cylindrical body, and the filter material is inserted and disposed in the cylindrical body.

  (7) The rainwater infiltration basin according to claim 6, wherein a hook for attachment and detachment is provided at an end of the filter material.

  (8) The rainwater infiltration basin according to claim 6, wherein the through hole is a circular hole, and the infiltration member is a columnar member.

1 is a cross-sectional view showing a rainwater seepage rod according to an embodiment of the present invention. Sectional drawing which shows the existing rainwater tank. The side view which shows a processing apparatus. The front view which shows a processing apparatus. The top view which shows a shaft runout prevention metal fitting. Explanatory drawing which shows the fixing method by a shaft runout prevention metal fitting. (A)-(d) is sectional drawing for demonstrating a rainwater penetration hatching method. (A)-(c) is a top view for demonstrating a rainwater penetration hatching method. Sectional drawing which shows the rainwater penetration penetrating of another embodiment. Sectional drawing which shows the rainwater penetration penetrating of another embodiment. The perspective view which shows a pseudo | simulation box. The front view which shows the processing apparatus of another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Existing rainwater tank 11 ... Rainwater infiltration tank 12, 85 ... Trap body 13, 81, 82 ... Infiltration member 15 ... Drain pipe 16 ... Rainwater main pipe 24 ... Through hole 25 ... Earth 26 ... Infiltration member accommodation hole 31 ... Cylindrical body As a pipe 32 ... Strainer as a filter material 33 ... Through hole 34 ... Pore 40 ... Processing device as an existing rainwater tank processing device 41 ... Main body frame 43 ... Hydraulic motor as a drive device 62 ... Rotating shaft 63 ... Rotating cutting tool A circular concrete cutter 65 as a shaft anti-vibration bracket as a rotation shaft shake prevention means 67 ... an arm portion 68 ... an adjustment shaft as an adjustment portion 84 ... a pseudo box constituting the rotation shaft shake prevention means

The present invention, rainwater penetration桝化method already set rainwater basins to modify by processing the existing rainwater basins rainwater seepage pit, already set rainwater basins processing apparatus, and a rainwater percolating box.

In order to solve the above-mentioned problem, the invention described in claim 1 is a method of processing an existing rainwater tank buried in the ground and modifying it into a rainwater infiltration tank, which comprises the bottomed bottom that constitutes the existing rainwater tank After processing with a rotary cutting tool with the cylindrical main body buried in the ground, forming a through hole at the bottom, excavating the soil below the through hole with a rotary excavator A permeating member housing hole, and a permeating member disposing step of disposing a porous permeating member in the permeating member housing hole. The gist is the law.

According to the first aspect of the present invention, in the drilling step, a through hole is formed in the bottom of the main body of the existing rainwater tank with the main body of the existing rainwater tank buried in the ground. In the penetrating member disposing step, a porous penetrating member is disposed in the vicinity of the through hole. In this way, it is possible to modify the rainwater tank into a rainwater infiltration tank without digging up the existing rainwater tank from the ground. Therefore, compared with the case where it replaces with a new rainwater infiltration rod, a rainwater infiltration rod can be constructed easily and rapidly, and the construction cost can be suppressed to half or less.
Furthermore, since the infiltration member is disposed so as to protrude downward from the bottom of the bag main body, it is possible to sufficiently ensure the rainwater infiltration area as compared with the case where only the through hole is provided. Moreover, since rainwater collects in the bottom part of the main body, rainwater can be efficiently infiltrated into the ground from the infiltration member through the through hole.

According to a second aspect of the present invention, in the first aspect , the penetrating member includes a cylindrical body having a plurality of through holes on a peripheral surface, and a plurality of fine pores smaller than the plurality of through holes, And a penetrating filter material that is detachably inserted into the body. In the penetrating member disposing step, the tubular member is disposed vertically in the penetrating member receiving hole, The gist is to insert and arrange the filter material.

According to invention of Claim 2 , a cylinder is arrange | positioned vertically in the penetration member accommodation hole formed under the through-hole, and a permeable filter material is inserted in the inside of the cylinder. A porous penetrating member made of a cylinder and a filter material is mounted below the through hole. Since this permeation member has a plurality of through holes on the peripheral surface of the cylindrical body, a sufficient permeation area of rainwater can be secured. Further, by providing a filter material having a plurality of fine pores smaller than the through holes of the cylinder in the cylinder, it is possible to prevent dust (gravel, leaves, etc.) contained in rainwater from entering the cylinder. . Therefore, it is possible to suppress a decrease in rainwater permeation ability due to clogging of the through holes of the cylindrical body. Further, in this penetrating member, since the cylindrical body is arranged vertically, the filter material can be easily attached and detached through the through hole at the bottom of the bag main body, and the maintenance work can be quickly performed.

The invention according to claim 3 is an apparatus used when an existing rainwater tank buried in the ground is processed and converted into a rainwater infiltration tank, and a main body frame and a drive device supported by the main body frame A rotating cutting tool that is attached to the tip of the rotating shaft of the driving device and that forms a through hole in the bottom of the dredge main body, and is in contact with the inner side surface of the existing rainwater dredging to drive the driving device. The gist of the existing rainwater drainage processing apparatus is provided with a rotation shaft shake prevention means for preventing the rotation shaft from shaking in the above.

According to the third aspect of the present invention, the driving device is supported on the main body frame, and the rotation shaft is rotationally driven by the driving device. Further, the rotation shaft shake preventing means abuts against the inner side surface of the existing rainwater tank, so that the rotation shaft is prevented from being shaken when the drive device is driven. For this reason, the through-hole can be accurately formed in the bottom portion of the rod main body by the cutting tool attached to the tip of the rotating shaft. Moreover, according to the processing apparatus having such a configuration, even if the existing rainwater trough is made of concrete, for example, it is possible to form a desired through hole without causing damage to the bottom of the spear body.

According to a fourth aspect of the present invention, in the third aspect , the rotation shaft shake preventing means includes a plurality of arm portions that are extendable in a plurality of directions orthogonal to the rotation shaft, and an amount of expansion / contraction of each arm portion. The gist of the present invention is to have an adjustment portion for adjusting the angle.

According to the invention described in claim 4 , by extending the plurality of arm portions of the rotating shaft shake preventing means in a plurality of directions orthogonal to the rotating shaft, the tips of the arm portions are brought into contact with the corner portion of the bag main body. Can be made. Therefore, the rotating shaft can be supported and fixed at a plurality of points. Further, even when the size of the heel body is different, if the amount of expansion / contraction of the plurality of arm portions is adjusted by the adjustment portion, the tip of each arm portion can be reliably brought into contact with the heel body. Therefore, by using this rotation shaft shake preventing means, the rotation shaft is reliably prevented from being shaken, so that the through hole can be accurately formed at a predetermined position in the bottom portion of the bag body.

The invention according to claim 5 is a rainwater permeation gutter formed by processing an existing rainwater gutter buried in the ground, and a bottomed cylindrical gutter body having a through-hole formed in the bottom, A drainage pipe provided on the side wall of the main body and connected to the rainwater main pipe, a cylinder having a plurality of through holes on the peripheral surface, and a plurality of fine pores smaller than the plurality of through holes, And a permeable filter material arranged so as to be insertable / removable, and the cylinder is vertically arranged in a penetration member receiving hole below the through hole, and the cylinder The gist of the present invention is a rainwater infiltration trough characterized in that the filter material is inserted and arranged in the body.

According to the fifth aspect of the present invention, a part of rainwater discharged from the discharge pipe to the rainwater main in the existing rainwater tank can be infiltrated into the ground through the penetration member from the through hole at the bottom of the main body. it can. Therefore, more rainwater can be discharged by using the rainwater infiltration tank of the present invention. Since the permeation member attached to the rainwater permeation trough has a plurality of through holes on the peripheral surface of the cylindrical body, a sufficient permeation area of rainwater can be secured. Further, by providing a filter material having a plurality of fine pores smaller than the through holes of the cylinder in the cylinder, it is possible to prevent dust (gravel, leaves, etc.) contained in rainwater from entering the cylinder. . Therefore, it is possible to suppress a decrease in rainwater permeation ability due to clogging of the through holes of the cylindrical body. Further, in this penetrating member, since the cylindrical body is arranged vertically, the filter material can be easily attached and detached through the through hole at the bottom of the bag main body, and the maintenance work can be quickly performed.

As described in detail above, according to the invention described in claim 1 or 2 , the rainwater infiltration hatching method for an existing rainwater tank that can process an existing rainwater tank and construct a rainwater infiltration tank quickly at low cost. Can be provided. Moreover, according to the invention of Claim 3 or 4 , the existing rainwater tank processing apparatus suitable for using for the rainwater penetration hatching method of an existing rainwater tank can be provided. Furthermore, according to the fifth aspect of the present invention, it is possible to provide a rainwater permeation gutter capable of processing an existing rainwater tank and discharging more rainwater.

First, in the processing preparatory step, open the grating lid 22 already set rainwater basins 10, using the vacuum cleaner for construction work, to remove rainwater and mud Masumoto body 12. And after making the state which can confirm the bottom of the coffin main body 12, the processing apparatus 40 is arrange | positioned at the upper part of the coffin main body 12. FIG. At this time, in the base member 46 of the processing apparatus 40, the other end portion without the wheel 48 is placed on a convex portion (for example, a square member 53 shown in FIG. 3) disposed on the outer side of the rod main body 12. In this state, by adjusting the horizontal adjustment mechanism 49 on the wheel 48 side, the protrusion amount of the flat plate 52 is changed to keep the main body frame 41 horizontal.

(1) The existing rainwater drainage processing apparatus according to claim 3 or 4 , further comprising a leveling mechanism for adjusting the level of the main body frame.

(2) The existing rainwater drainage processing apparatus according to claim 3 or 4 , wherein a wheel for moving the main body frame is provided at the bottom of the main body frame.

(3) according to claim 3 or 4, wherein the tip of the rotary shaft, said rotary cutting engineering tools and existing rainwater basins processing apparatus and rotating drilling instrument for drilling a soil is characterized in that it is provided to be exchanged .

(4) according to claim 3 or 4, the existing rainwater Masuichi processing apparatus characterized by comprising a lifting device for vertically moving said rotary cutting Engineering tools.

(5) The existing rainwater drainage processing device according to claim 3 or 4 , wherein the driving device is a hydraulic motor driven by hydraulic pressure.

(7) The rainwater infiltration trough according to claim 5 , wherein a hook for detachment is provided at an end of the filter material.

(8) The rainwater infiltration basin according to claim 5 , wherein the through hole is a circular hole, and the infiltration member is a columnar member.

In order to solve the above-mentioned problem, the invention described in claim 1 is a method of processing an existing rainwater tank buried in the ground and modifying it into a rainwater infiltration tank, which comprises the bottomed bottom that constitutes the existing rainwater tank A rotating shaft fixing step for fixing the rotating shaft on which the rotary cutting tool is mounted by causing the abutting member to contact the inner side surface of the cylindrical rod main body , and the rod main body embedded in the ground processed using the rotary cutting tool in a state to form the after forming a through hole in the bottom, penetrates member accommodation hole drilled with a rotary drilling instrument the soil at the bottom of the through-hole drilling A cylinder having a plurality of through-holes on a peripheral surface, a plurality of fine pores smaller than the plurality of through-holes, and formed into a cylindrical shape by winding resin fibers around a core rod; Insert the permeable filter material that can be inserted into and removed from the body and the resin fiber. So as to include a metal plate fixed to both ends of the core rod and having a diameter slightly smaller than the resin fiber portion, and a hook for attachment / detachment provided on the metal plate on the upper end side. member, said characterized in that it comprises a penetration member disposing step of disposing the penetration member housing hole, and its gist rainwater penetration桝化method of existing rainwater basins.

According to the first aspect of the present invention, in the drilling step, a through hole is formed in the bottom of the main body of the existing rainwater tank with the main body of the existing rainwater tank buried in the ground. In the penetrating member disposing step, a porous penetrating member is disposed in the vicinity of the through hole. In this way, it is possible to modify the rainwater tank into a rainwater infiltration tank without digging up the existing rainwater tank from the ground. Therefore, compared with the case where it replaces with a new rainwater infiltration rod, a rainwater infiltration rod can be constructed easily and rapidly, and the construction cost can be suppressed to half or less.
Furthermore, since the infiltration member is disposed so as to protrude downward from the bottom of the bag main body, it is possible to sufficiently ensure the rainwater infiltration area as compared with the case where only the through hole is provided. Moreover, since rainwater collects in the bottom part of the main body, rainwater can be efficiently infiltrated into the ground from the infiltration member through the through hole.
In addition, since the osmotic member has a plurality of through holes on the peripheral surface of the cylindrical body, it is possible to sufficiently ensure the rainwater infiltration area. Further, by providing a filter material having a plurality of fine pores smaller than the through holes of the cylinder in the cylinder, it is possible to prevent dust (gravel, leaves, etc.) contained in rainwater from entering the cylinder. . Therefore, it is possible to suppress a decrease in rainwater permeation ability due to clogging of the through holes of the cylindrical body.

According to a second aspect of the present invention, in the first aspect, in the penetrating member disposing step, after the cylindrical body is disposed vertically in the penetrating member accommodation hole, the filter material is inserted and disposed in the tubular body. The gist is to do.

According to invention of Claim 2, a cylinder is arrange | positioned vertically in the penetration member accommodation hole formed under the through-hole, and a permeable filter material is inserted in the inside of the cylinder. A porous penetrating member made of a cylinder and a filter material is mounted below the through hole . In this penetrating member, since the cylindrical body is disposed vertically, the filter material can be easily attached and detached through the through hole in the bottom of the bag main body, and the maintenance work can be quickly performed.

Invention of Claim 3 is an apparatus used when the rainwater penetration hatching method of the existing rainwater tank of Claim 1 or 2 is performed, and the said existing rainwater tank is processed and changed into a rainwater penetration tank. A main body frame, a driving device supported by the main body frame, a rotary cutting tool attached to a tip of a rotary shaft of the driving device and forming a through hole in a bottom portion of the main body, and the rotation The rotary excavator that can be attached to the tip of the rotary shaft of the drive device instead of a cutting tool, and excavates the soil below the through hole to form the penetrating member accommodation hole, and the existing rainwater The gist of the existing rainwater dredger processing device is provided with a rotation shaft shake prevention means for preventing the rotation shaft from shaking when the drive device is driven by contacting the inner surface of the bag.

The invention according to claim 5 is a rainwater permeation gutter formed by processing an existing rainwater gutter buried in the ground, and a bottomed cylindrical gutter body having a through-hole formed in the bottom, A drain pipe provided on the side wall of the main body and connected to the rainwater main pipe, a cylindrical body having a plurality of through holes on the peripheral surface, a plurality of fine pores smaller than the plurality of through holes , It is formed in a cylindrical shape by winding resin fibers, and is permeable to a filter material disposed so as to be insertable / removable in the cylinder , and is fixed to both ends of the core rod so as to sandwich the resin fibers. A penetrating member configured to include a metal plate having a diameter smaller than that of the portion and a hook for attaching / detaching provided on the metal plate on the upper end side, and in the penetrating member receiving hole below the through hole The cylinder is arranged vertically, and the filter material is inserted and arranged in the cylinder. Rainwater percolating box, characterized in that there as its gist.

Claims (6)

A method of processing an existing rainwater tank buried underground and converting it into a rainwater infiltration tank,
Processing the bottomed cylindrical gutter body constituting the existing rainwater gutter while being embedded in the ground, and forming a through hole in the bottom,
And a permeation member disposing step of disposing a porous permeation member in the vicinity of the through hole.   In the drilling step, the soil below the through hole is excavated to form a permeation member accommodation hole, and in the permeation member disposition step, the permeation member is disposed in the permeation member accommodation hole. The rainwater infiltration hatching method for an existing rainwater tank according to claim 1. The penetrating member has a cylindrical body having a plurality of through holes on a peripheral surface, and a permeable filter material that has a plurality of fine pores smaller than the plurality of through holes and is detachably inserted into the cylindrical body. Comprising
3. The existing rainwater according to claim 2, wherein in the infiltration member disposing step, the filter material is inserted and disposed in the tubular body after the tubular body is disposed vertically in the infiltrating member accommodation hole. Rainwater infiltration hatching method for firewood. A device used when processing an existing rainwater tank buried in the ground and converting it into a rainwater infiltration tank,
Body frame,
A driving device supported by the body frame;
A rotary cutting tool attached to the tip of the rotary shaft of the drive device and for forming a through hole in the bottom of the rod main body;
An existing rainwater drainage processing apparatus, comprising: a rotating shaft shake prevention means for preventing a shake of the rotating shaft when the drive device is driven by contacting an inner surface of the existing rainwater tank.   The rotating shaft shake preventing means includes a plurality of arm portions provided to be extendable in a plurality of directions orthogonal to the rotating shaft, and an adjusting portion for adjusting the amount of expansion / contraction of each arm portion. The existing rainwater tank processing apparatus according to claim 4. A rainwater infiltration basin formed by processing an existing stormwater basin buried in the ground,
A bottomed cylindrical bowl body with a through hole formed in the bottom;
A discharge pipe provided on the side wall of the main body and connected to the rainwater main,
A cylindrical body having a plurality of through holes on the peripheral surface, and a permeable filter material having a plurality of fine pores finer than the plurality of through holes and arranged so as to be inserted into and removed from the cylindrical body. A permeation member, wherein the cylindrical body is vertically disposed in a permeation member receiving hole below the through hole, and the filter material is inserted and disposed in the cylindrical body.桝.

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