JP2017078281A - Water permeable filtering device, earth retaining wall provided with the same and method for inserting the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water permeable filtering device which: has improved water collection ability with a drain pipe body having openings of water collection holes on an outer periphery thereof and an open tip section; and can filter out soil particles mixed in water in earth with a water permeable filtering material inserted into the drain pipe body in a manner that contacts an inner periphery thereof.SOLUTION: A water permeable filtering device comprises a drain pipe body having an open tip section and a plurality of openings of water collection holes on an outer periphery thereof and a water permeable filtering material detachably inserted into the drain pipe body.SELECTED DRAWING: Figure 1

Description

The present invention relates to a permeation filtering device that drains out permeated water contained in soil forming slopes such as rivers, coasts, roads, and constructed land, and a method for inserting the permeation filtration device.
The present invention also relates to a permeation filtration device for draining permeated water contained in the backfill soil of retaining walls provided in rivers, coasts, roads, constructed land, and the like, and a method for inserting the permeation filtering device. About.

Rivers, coasts, roads, land developments, etc. are provided with slopes (also called Toba) by cutting or embankment.
Conventionally, water stays in the embankment where slopes are formed due to rising river water level due to heavy rain and long rain, rising tide level due to storm surge and tsunami, etc., and the embankment breaks down, roads In order to prevent the collapse of the embankment, a water collecting pipe with a water-permeable hole is driven from the slope to the inside of the soil, and the water that has penetrated into the soil is removed from the slope from the slope. The technology to discharge is known. For slopes and retaining walls formed on the site, etc., for the same reason, water collecting pipes with water-permeable holes on the side are driven into the soil inside the slope and the soil behind the retaining wall. It is.

  For example, Patent Document 1 describes a reinforcing water draining steel pipe that is used in a lateral direction for embankment such as embankment, land development area, and sloped soil such as mountains, and the tip of the reinforcing water draining steel pipe is pressurized. It is formed in a tongue-like flat part, and by providing a large number of water permeable holes on the side wall of the steel pipe, it is possible to easily drive in, soil that is easily broken by the driving is reinforced, and rainwater that has penetrated into the soil, etc. It is described that water can be effectively prevented from collapsing because water is collected in the steel pipe through the water-permeable holes and discharged to the outside.

Further, in Patent Document 2, in the landslide construction method, first, the casing pipe is inserted to the planned depth while the casing pipe is inserted, and when the casing pipe is inserted to the predetermined depth, the inner rod is extracted, and then the inside of the casing pipe has a full length. A water collection method is described in which a water collection pipe body in which a large number of drain holes are provided and the tip is closed in a conical shape is inserted, and the water collection pipe body is buried in a natural ground in a stable state, It is described that groundwater collected from the drain hole is drained from the discharge port of the water collecting pipe body to prevent landslide.
Further, in Patent Document 2, a resistor made of sponge is spirally bonded to the outer peripheral surface of the water collecting pipe and inserted while being in close contact with the inner wall surface of the casing pipe, and then the casing pipe is inserted in the spiral direction of the resistor. And extubating while rotating in the opposite direction.

  In Patent Document 3, a guide tube driven into a backfill soil through a hole provided in a wall of an existing structure such as a retaining wall or a water channel wall, an outer tube, and the entirety are accommodated in the outer tube. A main body tube, the guide tube having a proximal end opened, and a distal end formed of a tubular member having a cone shape or a polygonal pyramid shape, the outer tube being provided with a flange at the opened proximal end, and the distal end closed. The water collecting pipe formed by the tubular member, and both ends open, and the flange provided at the tip opposite to the base end of the water collecting pipe is brought into contact with the flange of the water collecting pipe and fastened with a fastener. An inner wall pipe connected to the water collecting pipe, the water collecting pipe is accommodated in the guide pipe, and the main body pipe is formed of a tubular member having a proximal end opened and a distal end closed, and the guide Pipe, the water collecting pipe of the outer pipe, and the water collecting pipe among the main body pipes In the first half located on the inside, weep holes with multiple openings for draining are described, and by using the guide tube, the backfill soil is not collapsed and the existing structure is It is described that weep holes can be easily installed, and if clogging occurs, the function of the weep holes can be maintained satisfactorily by replacing or cleaning the main tube. Yes.

  In Patent Document 4, the drilling bit of the drilling rod inserted into the drainage sheath tube provided with a plurality of draining small holes on the side surface is rotated to drill a natural mountain, and then the drilling hole A rod is pulled out from the sheath tube and collected, and when draining ground water from the drainage sheath tube, a stopper member for preventing sand flow is attached to the outer peripheral side of the drainage sheath tube, and the sand is removed. After collecting the hole rod, a filtration member is inserted into the drainage sheath tube to prevent the earth and sand from flowing into the drainage sheath tube. The sand can be prevented from flowing out from the gap with the sheath pipe, and the intrusion of the flowing sand into the drainage sheath pipe can be effectively prevented. The drainage method of the ground mountain that can drain water efficiently It has been mounting.

Japanese Utility Model Publication No. 45-025068 Japanese Patent Laid-Open No. 10-037174 JP 2012-233367 A JP 2003-293377 A

  The steel pipe of Patent Document 1, the water collecting pipe of Patent Document 2, the guide pipe of Patent Document 3, and the sheath pipe for draining of Patent Document 4 are each provided with a plurality of water-permeable holes in the peripheral wall of the pipe and penetrated into the soil. Water such as rain water is collected and discharged to the outside, but the tip is formed into a tongue-like flat part in order to facilitate driving into the soil (see Patent Document 1), or the tip. It is formed in a conical shape with a closed portion (see Patent Document 2), or a tip is formed of a tubular member having a conical or polygonal pyramid shape (see Patent Document 3). In No. 3, water cannot be collected from the tip portion. Further, the drainage sheath tube of Patent Document 4 is provided with a sand-preventing rubber or a cone-shaped lid material at the tip in order to prevent sand from entering the drainage sheath tube (see FIG. 4 and the like). Therefore, water cannot be collected from the tip.

Therefore, in the present invention, a water collecting hole is opened in the outer peripheral surface of the drain pipe body, and the tip of the drain pipe body is also opened to improve the water collecting power. It aims at providing the water-permeable filtration apparatus which can filter the soil particle mixed in the water in soil by inscribed and inserting in a drain pipe main body.
Further, in the present invention, a water collecting hole is opened in the outer peripheral surface of the drain pipe main body, and the tip of the drain pipe main body is also opened to improve the water collecting power. A shaft tube with a water collecting hole was inserted into the shaft tube, and this shaft tube was covered with a water-permeable filter material inserted in contact with the drain pipe body, and mixed into the water in the soil. It aims at providing the water-permeable filtration apparatus which can filter a soil particle.
Moreover, in the present invention, by providing a spiral water shielding plate on the outer peripheral surface of the drain pipe body, water in the soil is prevented from flowing along the boundary between the outer peripheral surface of the drain pipe body and the soil. An object of the present invention is to provide a water permeation filtering device capable of reliably collecting water in the soil from a water collecting hole of a drain pipe main body and draining it from a water guide groove inside the drain pipe main body or the shaft pipe. And
Further, in the present invention, an insertion guide rod having a tip formed in a spire shape is provided, and when the insertion guide rod is inserted into the drain pipe main body, the tip of the insertion guide rod is the drain pipe main body. It aims at the insertion method of the water-permeable filtration apparatus which can be easily inserted in the soil of a drain pipe main body by protruding from the opening part of a front-end | tip.

  In order to achieve the above object, the water permeation filtering device of the present invention includes a drain pipe body having a front end opened and a plurality of water collecting holes formed on the outer peripheral surface, and is attachable to and removable from the drain pipe main body. It has the 1st characteristic that it provided with the water-permeable filter material inserted in.

  Further, the water permeation filtering device of the present invention is mounted on a shaft tube having an opening at the tip and a plurality of water collecting holes formed on the outer peripheral surface, and is detachably inserted into the drainage pipe body together with the shaft tube. The second feature is that it is worn.

  Moreover, the water permeable filtration device of the present invention is characterized in that a means for locking the water permeable filter material is provided on the outer peripheral surface of the shaft tube.

  Moreover, the water-permeable filtration apparatus of this invention makes it the 4th characteristic that the spiral water shielding plate is provided in the outer peripheral surface of the said drain pipe main body.

  The water-permeable filtration device according to the fifth aspect of the present invention is characterized in that, when the drainage pipe body is inserted into the soil, an insertion guide rod whose tip is formed in a spire shape is inserted. To do.

  Moreover, the retaining wall of the present invention includes any one of the water permeation filtering devices described in the first to fifth features.

  Further, the insertion method of the permeable filtration device of the present invention is a guide rod for insertion in which a tip portion is formed in a spire shape in a drain pipe body having a tip portion opened and a plurality of water collecting holes opened on an outer peripheral surface. A step of inserting into the soil with the insertion guide rod being inserted into the drainage pipe body, and the insertion after the insertion of the drainage pipe body is completed. According to a first aspect of the present invention, the guide rod includes a step of extracting the guide rod from the drain pipe main body, and a step of detachably inserting a water-permeable filter material into the drain pipe main body after the pipe is extracted.

  Further, in the method for inserting a water permeable filtration device according to the present invention, the step of detachably inserting the water permeable filter material into the drain pipe main body includes the water permeable filter material being mounted on an outer periphery of the shaft tube. A second feature is that the step is detachably inserted into the drain pipe body.

  According to the present invention, the water collecting force can be improved by opening the water collecting hole in the outer peripheral surface of the drain pipe main body and also opening the tip of the drain pipe main body.

  Further, according to the present invention, by detachably inserting the water permeable filter material into the drain pipe main body, soil particles mixed in the water in the soil can be filtered, and the water permeable filter material is damaged or When clogged, it can be easily replaced.

  Furthermore, according to the present invention, the insertion of the drain pipe main body into the soil can be facilitated by including the insertion guide rod whose tip is formed in the shape of a spire.

It is explanatory drawing of the drain pipe main body of the water-permeable filtration apparatus of 1st embodiment of this invention. It is explanatory drawing of the water-permeable filtration member and axial tube of the water-permeable filtration apparatus of 1st embodiment of this invention. It is explanatory drawing of the guide rod for insertion of the water-permeable filtration apparatus of 1st embodiment of this invention. It is a figure explaining the insertion method to the slope of the water-permeable filtration apparatus of 1st embodiment of this invention. It is a figure explaining the insertion method to the retaining wall of the water-permeable filtration apparatus of 1st embodiment of this invention. It is a figure explaining the water-permeable filter material main body of the water-permeable filter of 2nd embodiment in this invention.

  Hereinafter, the present invention will be described more specifically with reference to preferred embodiments. However, the following embodiments are merely examples embodying the present invention, and the present invention is not limited thereto.

(First embodiment)
[Water-permeable filtration device]
First, the drain pipe main body of the permeable filtration apparatus of 1st embodiment of this invention is demonstrated, referring FIG. 1 (a)-FIG.1 (d). Fig.1 (a) is a right view of the drain pipe main body of the water-permeable filtration apparatus of 1st embodiment of this invention. FIG.1 (b) is front sectional drawing of the drain pipe main body of the water-permeable filtration apparatus of 1st embodiment of this invention. FIG.1 (c) is explanatory drawing of the internal structure of the drain pipe main body of the water-permeable filtration apparatus of 1st embodiment of this invention. FIG.1 (d) is a perspective view of the modification of the water-permeable filtration apparatus of 1st embodiment of this invention.

As shown in FIGS. 1 (a) to 1 (d), a water permeation filtering device 1 according to a first embodiment of the present invention has a drain pipe main body 2 having a plurality of water collecting holes 3 formed on an outer peripheral surface. doing. A water guide groove 4 is formed at the bottom of the drain pipe main body 2, and rainwater collected from the water collecting hole 3 is supplied to the end of the drain pipe main body 2 through the water guide groove 4. Drained from the drain port 6 of the plate 5. Therefore, the water collecting hole 3 is not opened in the portion of the water guide groove 4 at the bottom of the drainage main body pipe 2. Here, the shape of the water collecting hole 3 is not particularly limited, and may be formed in a shape such as a circular shape or an elliptical shape that allows easy water collection.
The distal end portion of the drain pipe main body 2 is joined by welding a frustoconical different diameter pipe 7 having a tip opening 7a, and water can also be collected from the tip opening 7a. In comparison, the water collection capacity has improved remarkably.

A reinforcing ring plate 8 is welded to the rear end portion of the drain pipe main body 2, and hook-like claws 9 are provided at a plurality of locations on the end portion of the reinforcing ring plate 8. Since the impact from the insertion machine is applied to the outer periphery of the rear end of the drain pipe main body 2 protruding from the surface of the slope or the retaining wall surface when inserting into the soil, a reinforcing ring plate 8 is provided for shock buffering. It has been.
Further, by inserting the hook-like claw 9 provided on the reinforcing ring plate 8 into the fitting opening 17 opened in the end plate 5 joined to the rear end portion of the shaft tube described later, It also serves to prevent unnecessary rotation.

  FIG. 1B is a front sectional view of the drain pipe main body 2 of the water permeable filtration device 1. The drain pipe main body 2 has a circular cross section, a water collecting hole 3 is opened on the outer peripheral surface, and a portion indicated by an arrow is provided as a water guide groove 4 at the bottom. The water collecting hole 3 is not opened in the water guide groove 4.

  FIG. 1C is a diagram illustrating the internal structure of the drain pipe main body 2. A shaft pipe 10 having a smaller diameter than the drain pipe main body 2 is detachably inserted into the drain pipe main body 2. As with the drain pipe main body 2, the shaft pipe 10 is also open at the tip, and has a plurality of water collecting holes 15 on the outer peripheral surface. Protruding pawls 11 are provided on the outer peripheral surface of the shaft tube 10 at predetermined intervals. The shaft tube 10 is covered with a substantially cylindrical water-permeable filter material 12 having a predetermined thickness on the outer periphery, and is detachably attached to the drain tube body 2. Here, the shaft tube 10 having the outer periphery covered with the water-permeable filter material 12 is referred to as a water-permeable filter shaft tube 13. When the permeable filtration shaft tube 13 is damaged or clogged, it is necessary to replace the permeable filtration shaft tube 13 with a new permeable filtration shaft tube 13. When 13 is drained from the drain pipe main body 2, only the shaft pipe 10 is pulled out, and the permeable filter material 12 may remain inside the drain pipe main body 2.

For this reason, when the projecting pawl 11 is provided at a predetermined position on the outer peripheral surface of the shaft tube 10 and the water permeable filter material 12 is mounted on the shaft tube 10, the water permeable filter material 12 is locked to the pawl 11. Thus, as described above, when the permeable filtration shaft tube 13 is extracted from the drain pipe main body 2, only the shaft pipe 10 may be extracted and the permeable filter material 12 may remain inside the drain pipe main body 2. It was greatly reduced. The pawl 11 is preferably projected so as to form an acute angle from the outer peripheral surface of the shaft tube 10 toward the rear end portion of the shaft tube 10. When formed in this way, the water-permeable filter material 12 is naturally mounted from the tip of the shaft tube 10.
An end plate 5 provided with a plurality of fitting inlets 17, a handle 14, and a drain port 6 is attached to the rear end portion of the shaft tube 10.
In addition, although mentioned later as a 2nd Example, a predetermined | prescribed water-permeable filtration effect | action can be show | played also in the structure which inserted the water-permeable filter material 2 in the drain pipe main body 2 without providing the axial tube 10. FIG.

  In addition, although the water-permeable filter material 12 is comprised by what shape | molded the three-dimensional mesh shape like the dry fiber of a plant loofah, for example, if it is a raw material which has a water-permeable filtration function, it will not specifically limit. The permeable filter material 12 is inserted in contact with the inner wall surface of the drain pipe main body 2.

FIG.1 (d) is a perspective view of the modification of the water-permeable filtration apparatus of 1st embodiment of this invention. The water permeation filtering device 50 is formed by forming a water shielding plate 51 in a spiral shape on the outer peripheral surface of the drain pipe main body 2 of the water permeation filtering device 1 described above, and the remaining configuration is the same as the configuration of the water permeation filtering device 1. It is.
The reason why the water shielding plate 51 is provided will be described below.

  In the state in which the water permeable filtration device 1 is inserted into the soil, moisture mixed with soil particles enters the gap between the outer peripheral surface of the drain pipe main body 2 and the soil, and water is introduced into the outer peripheral surface of the drain pipe main body 2. May be discharged out of the slope. When such a state frequently occurs, the soil around the drain pipe body 2 is also discharged together with the moisture mixed with the soil particles, and the gap around the drain pipe body 2 gradually increases, Strength deterioration will occur.

  For this reason, in the permeable filtration apparatus 50, the water content in the soil flows out of the slope along the outer peripheral surface of the drain pipe main body 2 by providing the water shielding plate 52 in a spiral shape on the outer peripheral surface of the drain pipe main body 51. Even if an attempt is made, water is blocked by the water blocking plate 52 and water is reliably collected from the water collecting hole 3. As a result, there is no possibility that the gap between the outer peripheral surface of the drain pipe main body 51 and the soil as described above is widened and the strength in the slope soil is deteriorated.

  In addition, when inserting the water-permeable filtration apparatus 50 in soil or a retaining wall, it inserts, rotating with an insertion machine. Since the water shielding plate 52 is formed in a spiral shape, it can be easily inserted into the soil or the retaining wall by rotating. When the water permeable filtration device 50 is extracted from the soil or the retaining wall, it can be easily extracted by rotating it reversely to the time of insertion.

Next, the water-permeable filtration shaft tube 13 will be described with reference to FIGS. 2 (a) to 2 (d).
FIG. 2A is a view for explaining the internal structure of the water-permeable filtration shaft tube 13. The permeable filtration shaft tube 13 is mainly composed of the permeable filter material 12 and the shaft tube 10. As with the drain pipe main body 2, the shaft pipe 10 is open at the tip and has a plurality of water collecting holes 15 on the outer peripheral surface. The shaft tube 10 is covered with a water-permeable filter material 12 over the entire outer periphery. In addition, although the front-end | tip part of the axial tube 10 is opened, the water-permeable filter material 12b similar to the water-permeable filter material 12 is embed | buried in this front-end | tip opening part 10a, and, thereby, the soil particle from the front-end | tip opening part 10a. Can be prevented from flowing into the shaft tube 10. An end plate 5 having a handle 14 is joined to the rear end portion of the shaft tube 10. A shaft pipe drain port 16 is opened in the lower portion of the rear end of the shaft tube 10. Moisture collected and filtered from the tip opening 10a of the shaft tube 10 or the water collecting hole 15 is drained from the shaft tube drain port 16, and further from the drain port 6 of the end plate 5 out of the slope or retaining wall. Drained outside. A water guide groove similar to the water guide groove 4 provided at the bottom of the drain pipe main body 2 is also provided at the bottom of the shaft pipe 10.

FIG. 2B is a cross-sectional view taken along line AA ′ in FIG. The permeable filtration shaft tube 13 is configured by a permeable filter material 12 having a bowl-like cross section being mounted on a shaft tube 10 having a substantially circular cross section formed on the outer peripheral surface of a protruding pawl 11. The pawl 11 is provided to lock the water-permeable filter material 12 to the shaft tube 10.
The inner diameter of the water-permeable filter material 12 having a bowl-shaped cross section is substantially the same as the outer diameter of the shaft tube 10. For this reason, when the permeable filtration shaft tube 13 is inserted into the drain pipe main body 2, the gap between the drain pipe main body 2 and the shaft pipe 10 is filled with the permeable filter material 12. As a result, the front end opening 7a of the drain pipe main body 2 is filled with the permeable filter material 12 and the permeable filter material 12a.

  FIG. 2C is a front view of the end plate 5. The bowl-shaped end plate 5 has openings 17 at three locations, an upper portion and left and right portions, a handle 14 is attached to the center portion, and a drain port 6 is opened at the lower portion.

FIG. 2D is a perspective view illustrating the shaft tube 10. As described above, a plurality of pawls 11 and a plurality of water collecting holes 15 are formed on the outer peripheral surface of the shaft tube 10, the tip opening 10a is opened, and the shaft tube drain port 16 is opened at the lower end of the rear end. It is holed. A water-permeable filter material 12a is embedded in the tip opening 10a. For this reason, when the water permeable filtration shaft tube 13 is inserted into the drain pipe main body 2, the soil particles are filtered from the tip opening 7 a of the drain pipe main body 2, and moisture flows in.
An end plate 5 is welded to the rear end portion of the shaft tube 10, and the end plate 5 is provided with a plurality of fitting ports 17, drainage ports 6, and a handle 14.

  When the permeable filtration shaft tube 13 is inserted into the drain pipe main body 2, the fitting inlet 17 opened in the end plate 5 is provided in the hook-like claw 9 provided in the reinforcing ring plate 8 at the rear of the drain pipe main body 2. By inserting and rotating the handle 14, the hook-like claw 9 is locked to the fitting inlet 17. That is, since the permeable shaft tube 13 is fixed to the drain pipe main body 2, unnecessary rotation can be prevented when the permeable filter device 1 is inserted into the soil or the retaining wall. When removing the permeable filtration shaft tube 13 from the drain pipe main body 2, the handle 14 may be turned in the reverse direction.

Next, the insertion guide rod will be described with reference to FIGS. 3 (a) to 3 (c).
In this invention, the front-end | tip part of the drain pipe main body 2 is opened in the shape of a truncated cone. Therefore, it is very difficult to insert it into the soil as it is, and even if it is inserted, the soil particles are entering from the opening, and therefore the water-permeable filtration shaft tube 13 cannot be inserted.

Therefore, in the permeable filtration device according to the first embodiment of the present invention, the insertion guide rod 18 having a spire-shaped tip is inserted into the drain pipe main body 2 and inserted into the soil in this state. Is. When the insertion guide rod 18 is inserted into the drain pipe body 2, the spire-shaped tip of the insertion guide rod 18 is configured to protrude from the tip opening 7 a of the drain pipe body 2. Insertion into the inside can be performed easily.
The tip portion of the insertion guide rod 18 may have a conical shape or a polygonal pyramid shape in addition to the spire shape, and may have a shape that reduces resistance when the insertion guide rod 18 is inserted into the soil. There is no particular limitation.

  FIG. 3A is a view for explaining a state in which the insertion guide rod 18 is inserted into the drain pipe main body 2. The outer diameter of the insertion guide rod 18 is smaller than the inner diameter of the drain pipe main body 2. Further, the insertion guide rod 18 is formed longer than the drain pipe main body 2, and the maximum diameter portion of the spire-shaped portion at the tip is brought into contact with the inner wall surface of the different diameter pipe 7 of the drain pipe main body 2. A rear portion of the guide rod 18 having a predetermined length protrudes from a rear end portion of the drain pipe main body 2. A through hole 19 is provided in the protruding portion 18a. In this state, the flange 20 is attached to the reinforcing ring plate 8 of the drain pipe main body 2. As shown in FIG. 3 (b), a plurality of insertion holes 21 are provided in the flange 20 fixed to the insertion guide rod 18 so as to correspond to the plurality of hook-like claws 9 of the reinforcing ring plate 8. Therefore, the flange 20 is fixed to the reinforcing ring plate 8 by inserting the insertion hole 21 into the hook-shaped claw 9.

As shown in FIGS. 3A and 3B, the flange 20 is attached by inserting a demounting handle 22 into the through hole 19 provided in the protruding portion 18a of the insertion guide rod 18 described above. . A fixed handle 22a is fitted at one end of the detachable handle 22, and a removable handle 22b is fitted at the other end. The fixed handle 22a and the removable handle 22b are connected by a shaft 22c.
When inserting the drain pipe main body 2 into the soil, two or more protruding hook-like claws 9 are provided at the ends of the reinforcing ring plate 8 at the rear of the drain pipe main body 2 so that the drain pipe main body 2 does not rotate independently. , And inserted into the insertion opening 21 opened in the inner peripheral surface of the flange 20 to prevent rotation. Further, when pulling out the insertion guide rod 18, the detachable handle 22 is inserted into the through hole 19 of the protruding portion 18a and rotated while being pulled out.

FIG. 3C is a view for explaining a state in which the attachment 23 is attached to the rear end portion of the insertion guide rod 18 when the permeable filter 1 is inserted into the soil or the retaining wall.
Furthermore, an attachment 23 to which the insertion machine b1 can be attached is inserted into the rear end portion of the insertion guide rod 18. Through holes 23a and 23a are also opened in the concave portion of the attachment 23. The concave portion of the attachment 23 is fitted into the protruding portion 18a of the guide rod 18 for insertion, and the connecting pin 24 can be inserted into the through hole 19 for connection. It was. The connecting pin 24 may be a bolt / nut pair.
At the rear end of the attachment 23, there is provided a shock absorbing packing 25 that contacts the insertion machine b1 and absorbs shocks during insertion.

[Method of inserting water-permeable filtration device]
With reference to FIG. 4, a method of inserting the water permeable filtration devices 1 and 50 into the soil using the insertion machine b1 will be described. 4 (a1), FIG. 4 (a2), FIG. 4 (a3), and FIG. 4 (a4) show a method of inserting the water permeable filtration device 1, and FIG. 4 (b1), FIG. 4 (b2), FIG. b3) and FIG.4 (b4) have shown the insertion method of the water-permeable filtration apparatus 50. FIG.

  Here, the water permeation filtering device 1 is inserted into the soil without rotation, but the water permeation filtering device 50 is inserted into the soil while rotating. As described above, the difference between the insertion method of the permeable filtration device 1 and the insertion method of the permeable filtration device 50 is only the presence or absence of rotation at the time of insertion, and the other points are the same. Will be described with reference to FIGS. 4 (a1) to 4 (a4).

  First, as shown in FIG. 4 (a1), a simple rail b2 is laid at an installation location, and an insertion machine b1 fixed on a movable carriage b3 is installed. An attachment 23 is fitted into the rear end portion of the insertion guide rod 18 inserted in the drain pipe body 2 in advance and connected by a connecting pin 24. The connected drain pipe main body 2 is pushed into the slope a2 by pushing the insertion machine b1 fixed to the movable carriage b3 on the simple rail b2 to the slope by the propulsion machine b5 installed on the front surface of the reaction force receiving base b4. Is done.

  FIG. 4 (a2) shows a method of removing the insertion machine b1 after completion of the insertion of the drain pipe body 2 and attaching the detachable handle 22 to the through hole 19 of the protruding portion 18a of the insertion guide rod 18 and pulling it out while rotating. Is shown.

4A3, after the insertion guide rod 18 is extracted from the drain pipe main body 2, the water permeation filter shaft tube 13 including the water permeation filter 12 and the shaft pipe 10 is inserted into the drain pipe main body 2. FIG. The method is shown.

FIG. 4 (a 4) shows that the permeation filter 1 is inserted into the drain pipe main body 2, and the fitting inlet 17 is formed in the end plate 5 in the hook-like claw 9 provided in the reinforcing ring plate 8. A method of fixing the handle 14 by rotating the handle 14 is shown. In this way, the insertion of the water permeable filtration device 1 into the soil is completed.

  Although not shown in the figure, when the function of the water permeable filtration device 1 is deteriorated, first, the handle 14 attached to the end plate 5 is rotated to move the end plate 5 from the hook-like claw 9. The drain wall main body 2 inner wall can be cleaned by removing and pulling out the permeable filtration shaft tube 13 while rotating the handle 14. By repeating this operation, the water permeable filtration device 1 can be maintained and managed.

[Retaining wall with permeable filtration device]
Finally, with reference to FIG. 5, the insertion into the retaining wall of the water permeable filtration device according to the first embodiment of the present invention will be described.
Fig.5 (a) is a figure explaining the technique which installs the water-permeable filtration apparatus 1 in the soil inside a retaining wall back surface through the retaining wall simultaneously with construction of a retaining wall. FIG. 5A shows a retaining wall a3, a soil a2 on the back of the retaining wall a3, and a slope a1 formed on the top of the soil a2 on the back of the retaining wall. The retaining wall a3 is made of concrete. In the process of forming the retaining wall a3, the water permeation filtering device 1 is installed, and the protective material P is wound around the area where the water permeation filtering device 1 inside the retaining wall a3 is embedded.

  Further, a part of the water permeable filtration device 1 protrudes on the soil a2 side of the retaining wall a3 on the back surface of the retaining wall, and this projecting portion is a retaining wall rear surface soil that is a backfill of soil on the back surface of the retaining wall a3. In the process in which the middle a2 is formed, it is buried in the retaining wall back soil a2. And the rear-end part of the drain pipe main body 2 of the permeable filtration apparatus 1 is exposed to the wall surface of the retaining wall a3, the water | moisture content in the retaining wall back surface soil a2 is collected, and the drain port 6 of the drain pipe main body 2 is collected. From the wall surface of the retaining wall a3.

  FIG.5 (b) is a figure explaining the technique which inserts the water-permeable filtration apparatus 50 in the inside of the retaining wall back soil of the existing retaining wall. FIG. 5B shows a retaining wall a31, a soil a2 on the back surface of the retaining wall a31, and a slope a1 formed on the top of the retaining wall back soil a2. The existing retaining wall a31 is made of concrete, and an insertion hole through which the water permeable filtration device 50 can be inserted is not provided. Therefore, first, an insertion hole 27 into which the water permeable filtration device 50 can be inserted is formed in the retaining wall a31 with a hole drilling machine (not shown). And using the insertion machine b1, it inserts in the insertion hole 27, rotating the water-permeable filtration apparatus 50, and inserts it in the retaining wall back surface soil a2 through the retaining wall a31.

  In this way, the water permeable filtration device 50 can be inserted into the back soil a2 of the existing retaining wall. At this time, the rear end portion of the drainage pipe main body 2 of the water permeable filtration device 50 is exposed on the wall surface of the retaining wall a31, and water inside the retaining wall back surface soil a2 is collected and the drainage port of the drainage pipe main body 2 is collected. 6 is drained outside the wall surface of the retaining wall a31.

(Second embodiment)
Next, first, a water permeation filtering apparatus according to a second embodiment of the present invention will be described with reference to FIGS. 6 (a) to 6 (d). The water permeation filter of the second embodiment of the present invention is largely different from the water permeation filter 1 of the first embodiment in that the shaft tube 10 is not provided. Since the drain pipe main body is the same as that of the first embodiment, the description thereof is omitted. Here, members related to the water-permeable filter material main body provided inside will be described. 6A is a cross-sectional view of the right surface of the permeable filter body 60, FIG. 6B is a perspective view of the permeable filter body, and FIG. 6C is FIG. ) Is a cross-sectional view taken along the line BB ′ of FIG. 6, and FIG. 6D is a perspective view of the end cap of the water-permeable filter body.

  In the permeable filtration device of the second embodiment of the present invention, a permeable filter material main body 61 as shown in FIGS. 6A to 6D is inserted without providing a shaft tube. The permeable filter main body 61 includes a substantially cylindrical permeable filter material 62 having an open front end portion and a rear end portion, a tip permeable filter material 64 embedded in the tip opening portion 63 of the permeable filter material 62, and the permeable filter material. An end cap 66 is detachably attached to the rear end opening 65 of the 62, and is formed so as to be inscribed and attached to a drain pipe main body (not shown).

  The water permeable filter material 61 may have the same material and shape as the water permeable filter material 12 of the first embodiment, or the material and shape may be appropriately changed as necessary. The tip water-permeable filter material 64 may be the same material as the water-permeable filter material 61 and is embedded in the tip opening portion so that soil particles do not enter from the tip opening portion 63.

  The end cap 66 includes a socket 67 and an end plate 68. The socket 67 has a substantially cylindrical shape, is formed so as to be detachably attached to the water-permeable filter material 62, and an end portion is attached to the end plate. Since the end plate 68 has the same configuration as the end plate 5 of the first embodiment, description thereof is omitted.

  Thus, in the permeable filtration apparatus of 2nd embodiment of this invention, by providing the permeable filter material 62 and the front-end permeable filter material 64 similar to 1st embodiment, there exists a fixed permeable filtration effect | action. . Moreover, the permeable filtration apparatus of 2nd embodiment inserts the end cap 66 in the rear-end opening part 65 of the permeable filter material 63, without using an axial tube, and the attachment or detachment in the drain pipe main body 2 is easy. It can be carried out. The end cap 66 is attached to and detached from the drain pipe main body 2 in the same manner as in the first embodiment.

  The water permeation filter of the second embodiment of the present invention can also be provided with a water shielding plate in the same manner as the water permeation filter of the first embodiment, and is installed on the retaining wall in the same manner as the water permeation filter of the first embodiment. be able to. Since the configuration of the water shielding plate, the installation method on the retaining wall, the configuration, and the like are the same as those in the first embodiment, the description thereof is omitted.

DESCRIPTION OF SYMBOLS 1,50 Permeable filtration apparatus 2 Drainage pipe main body 3,15 Water collecting hole 4 Water guide groove 5 End plate 6 Drainage port 7 Different diameter pipes 7a, 10a, 63 Tip opening 8 Reinforcement ring plate 9 Claw-shaped claw 10 Claw 12, 12a, 62 Permeable filter material 13 Permeable filtration shaft tube 14 Handle 16 Shaft tube drain port 17 Insertion port 18 Insertion guide rod 18a Overhang portion 19 Through hole 20 鍔 21 Insertion port 22 Detachment handle 22a Fixed handle 22b Detachable type Handle 22c Shaft 23 Attachment 24 Connecting pin 25 Buffer packing 26, 27 Insertion hole 61 Permeable filter material body 64 Front permeate filter material 65 Rear end opening 66 End cap 67 Socket a1 Slope a2 Retaining wall back surface soil a3, a31 Retaining wall b1 Inserting machine b2 Simple rail b3 Moving cart
b4 Reaction force cradle b5 Propulsion machine

Claims (8)

A drain pipe main body having a distal end opened and a plurality of water collecting holes formed in the outer peripheral surface;
A water permeation filtering device comprising a water permeation filtering material inscribed in the drain pipe main body and detachably attached thereto. The water-permeable filter material is attached to a shaft tube having a distal end opened and a plurality of water collecting holes formed on an outer peripheral surface, and is detachably inserted into the drain tube main body together with the shaft tube. The water-permeable filtration device according to claim 1. The water permeable filtration device according to claim 2, wherein means for locking the water permeable filter material is provided on an outer peripheral surface of the shaft tube. The permeable filtration apparatus according to any one of claims 1 to 3, wherein a spiral water shielding plate is provided on an outer peripheral surface of the drain pipe main body. The insertion guide rod having a tip formed in a spire shape is inserted when the drain pipe main body is inserted into the soil. The water-permeable filtration device according to item. A retaining wall comprising the water-permeable filtration device according to any one of claims 1 to 5. A step of inserting a guide rod for insertion having a tip formed in a spire shape into a drain pipe main body having a tip portion opened and a plurality of water collecting holes formed in an outer peripheral surface;
In the state where the insertion guide rod is inserted into the drain pipe main body, the step of being inserted into the soil,
After the insertion of the drainage pipe body is completed, the insertion guide rod is removed from the drainage pipe body; and
And a step of detachably inserting the water permeable filter material into the drain pipe main body after the tube is extracted. The step of detachably inserting the water permeable filter material into the drain pipe main body,
The permeation filtering device according to claim 7, wherein the permeation filtering material is a step in which the permeation filtering material is attached to the outer periphery of the shaft tube and is detachably inserted into the drainage pipe main body together with the shaft tube. Insertion method.

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