JP2019206844A - Drain pipe - Google Patents

Abstract

To provide the drain pipe that does not require backfill material, can be easily inserted into a center of a drilling hole, and can be accurately inserted to a predetermined depth.SOLUTION: The drain pipe 10 that is buried in the ground and is infiltrated with rainwater or the like comprises; a cylindrical drain pipe resin skeleton 2, and a resin block body 3 disposed outside a drain tube resin skeleton 2, wherein the drain pipe resin skeleton 2 and the resin block body 3 are connected in series, respectively, and at least one of connections is a connection by a joint socket 6 with a fastening plate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to, for example, a drain pipe that is buried in the ground to construct a vertical rainwater infiltration facility.

  In recent years, the frequency of rainfall exceeding 60 mm per hour tends to increase in Japan due to the global extreme weather. Urbanization is also taking place at a rapid pace, which reduces the function of infiltration of rainwater from the ground surface, resulting in frequent urban floods. For this reason, the development and introduction of rainwater storage and penetration facilities are underway. As for rainwater infiltration facilities, facilities that infiltrate on the ground relatively close to the ground surface are the mainstream, and in order to secure a larger amount of infiltration, the facilities tend to be larger.

  For example, Japanese Patent Laying-Open No. 2015-183493 includes a rainwater storage and penetration tank 10 that collects rainwater in the basement having a permeable layer G2 below the hardly permeable layer G1 and allows it to flow out or permeate into the ground. 10, a plurality of seepage wells 20 connected to the permeable layer G2 are provided, and the rainwater storage seepage tank 10 is provided with a through hole 13 through which the seepage well 20 is inserted. The infiltration well 20 has a gap S <b> 2 between them, and has a double tube structure including an outer tube 21 and an inner tube 22 in which a plurality of through holes are formed on the peripheral surface. A rainwater storage and infiltration facility 1 having a configuration in which a water permeable sheet 23 is disposed therebetween is disclosed. According to the rainwater storage and penetration facility 1, the rainwater storage and penetration tank can be applied to the ground having a high groundwater level, and can be easily installed with a simple configuration.

  On the other hand, vertical rainwater infiltration facilities for the purpose of saving space in rainwater infiltration facilities are attracting attention. As such a vertical rainwater infiltration facility, a drain pipe shown in FIGS. 8 and 9 is known. This drain pipe is a technique for constructing a vertical rainwater infiltration facility 100 by embedding a perforated cylindrical pipe (drain pipe resin skeleton) 102 made of polypropylene having an inner diameter of 85 mm containing a water permeable sheet 103 in the ground. In the vertical rainwater infiltration facility 100, in order to embed the drain pipe resin skeleton 102 in the ground, for example, first, an underground excavator equipped with an auger screw is used, and the drain pipe resin skeleton 102 is buried in the ground. A drilling hole having an inner diameter larger than the outer diameter is formed. Next, the drain pipe resin skeleton 102 is inserted into the formed excavation hole from the ground surface. As another construction method, there is also a method in which a casing is built in advance, earth and sand in the casing is discharged to the ground surface with a drill with a spiral blade, a drain pipe is inserted into the casing, and then the casing is pulled out. After the drain pipe resin skeleton 102 is built in the ground, rough washing sand (backfill material) 104 is backfilled in the gaps around the drain pipe resin skeleton 102. Thereby, it is prevented that clayey surrounding soil adheres and the osmosis | permeation function of an infiltration surface falls. According to this method, by extending the drain pipe in the depth direction, it is possible to expand the infiltration area without increasing the area occupied by the facility on the ground, and a high design head can be obtained and the infiltration facility can be obtained. Can save space. In addition, even if the vicinity of the ground surface is infiltration-improper ground, it can be applied by extending the infiltration facility to the infiltration target layer. Moreover, since the cavity of diameter 85mm can be ensured inside, the storage amount per unit volume becomes larger than the conventional infiltration facility filled with crushed stone. In FIG. 8, symbol A is an infiltration-improper ground, B is an infiltration-suitable ground, 108 is rainwater, 107 is an upper filter, 106 is a PVC pipe, and 105 is a joint. The drain pipe main body 101 is located in the appropriate permeation ground in the drain pipe.

JP2015-183493A

  However, according to the conventional drain method, there is a problem that when inserting the drain pipe into the excavation hole, it is difficult to insert the drain pipe into the center of the excavation hole, and it is not possible to insert it precisely to the planned depth. Specifically, due to the difference in diameter between the drain pipe and the drilling hole, it tends to be offset, and if the drilling hole becomes even a slight inclination, it is impossible to insert diagonally according to the inclination, and the tip is the drilling hole. There is a problem that it cannot hit the inner wall and cannot be inserted vertically. For this reason, after insertion into the drain pipe, core misalignment and hidden voids are formed. As a result, the surrounding soil adheres to the surface of the resin skeleton of the drain pipe, causing clogging, and the water permeability function is impaired. Further, when the casing is not used, protrusions often appear on the inner wall surface of the excavation hole, which becomes an obstacle at the time of insertion. In addition, when the excavation hole collapses, there is a problem that the insertion cannot be performed to a predetermined depth. Moreover, when using a casing, since a backfilling material is put in while pulling out a casing little by little, there exists a problem that pinpoint (position limitation) construction cannot be performed. Furthermore, when there is a groundwater level, the inside becomes muddy due to the influence of excavation, and there is a problem that the surface of the drain pipe is clogged at the time of insertion.

  Accordingly, an object of the present invention is to provide a drain pipe that does not require a backfill material, can be easily inserted into the center of a drilling hole, and can be accurately inserted to a predetermined depth.

  That is, the present invention solves the above-described problem, and is a drain pipe buried in the ground and used for infiltration into the ground such as rainwater and pumping groundwater, and a cylindrical drain pipe resin skeleton, A resin block body disposed outside the drain tube resin skeleton, and a plurality of the drain tube resin skeleton and the resin block body are connected in series, and the connection The drain pipe is characterized in that at least one of the connections is a connection by a joint socket with a retaining plate.

  In addition, the present invention provides the drain pipe, wherein the fastening socket with a fastening plate is such that the fastening plate is screwed into a screw formed on an outer peripheral surface of the joint socket. .

  Further, the present invention provides the drain pipe, wherein the fastening socket with a fastening plate is a fastening plate that is integrally attached to an end portion in the axial direction of the tubular joint socket. Is.

  Further, the present invention provides the drain pipe, wherein a screw is formed on an outer peripheral surface of the joint socket in the joint socket with the fastening plate, and the fastening plate is screwed to the screw. Is.

  Further, the present invention provides the drain pipe, wherein the joint socket is connected to the drain pipe resin skeleton, and the fastening board supports the resin block body. It is.

  In addition, the present invention provides the drain pipe, wherein the resin block body is a combination of a water-permeable resin block body and a water-impermeable resin block body, or a water-permeable resin block body. .

  In addition, the present invention provides the drain pipe, wherein the water permeable resin block body is a water permeable porous body.

  In addition, the present invention provides the drain pipe, wherein the resin block body is a cylindrical body or an assembled cylindrical body of a half cylinder.

  According to the present invention, the resin block body is used instead of the conventional backfill material (rough sand), and the resin block body is mounted in advance on the resin skeleton, so when inserting the drain pipe into the excavation hole, It is easy to insert the drain pipe into the center of the excavation hole, and it can be inserted precisely to the planned depth. Further, it is not necessary to throw in rough sand which is a backfill material without reducing the casing drawing speed. Moreover, although it depends on the degree of water permeability of the resin block body, a large storage amount per unit volume can be taken. Moreover, although the conventional rough sand has a variation in the water permeability coefficient, a uniform water permeability coefficient can be freely set by using the resin block body. Moreover, since the joint socket with a retaining plate is used, it is possible to prevent the resin block body from rising together when the casing is pulled out. Further, since the resin block can be fixed by pressure bonding, the surface adhesion of the resin block is increased, and the erection is stabilized.

It is a figure which shows the usage example of the drain pipe | tube in embodiment of this invention. It is XX sectional drawing of FIG. FIG. 2 is a simplified view of the drain pipe body of FIG. 1. (A) is the expanded fragmentary sectional view of the front-end | tip part of the drain pipe of FIG. 1, (B) is sectional drawing of a resin block body, (C) is sectional drawing of a joint socket, (D) FIG. 3 is a cross-sectional view of a fastening plate. It is sectional drawing explaining the assembly | attachment state of the front end side of the drain pipe | tube of FIG. It is sectional drawing explaining the assembly | attachment state by the side of the ground surface of the drain pipe | tube of FIG. It is a figure which shows the modification of a coupling socket. It is a figure which shows the usage example of the conventional drain pipe | tube. It is YY sectional drawing of FIG.

  In the present invention, the drain pipe is buried in the ground and used for infiltration of rainwater or the like into the ground and pumping up groundwater, and is also referred to as a cylindrical drain pipe resin skeleton (hereinafter simply referred to as “resin skeleton”). ) And a resin block body disposed on the outer peripheral side of the resin skeleton, and a plurality of the resin skeleton and the resin block body are connected in series in the vertical direction, and at least one place of this connection Is a connection by a joint socket with a retaining plate. The connection is a connection between two resin skeletons adjacent to each other in the vertical direction and two resin blocks, and an end cap at the tip of the drain pipe is excluded. However, you may use the joint socket with a fastening plate of this invention for the end cap of the front-end | tip of a drain pipe. The resin skeleton and the resin block body are not limited to the same length, and may be different. That is, the number of resin skeletons and resin block bodies used may be the same or different. In addition, it is preferable that all the connections are connections by a joint socket with a retaining plate, because all the resin block bodies can be firmly fixed and a drain pipe having high strength can be obtained. Rainwater or the like refers to, in addition to rainwater, flowing into the ground surface other than rainwater, such as domestic wastewater in undeveloped areas of main sewage, spring water from the mountain surface, and the like.

  In the present invention, the resin skeleton constituting the drain tube is cylindrical, and a large number of through-holes through which water can escape are formed on the outer peripheral surface of the cylinder. The resin skeleton preferably has sufficient strength against the horizontal load received in the soil, and the amount of strain generated by the earth pressure acting for a long time is preferably sufficiently small. Vinyl pipes can be used. Two or more resin skeletons are usually connected in series in the vertical direction. The length of one resin skeleton is 150 to 500 mm, preferably 200 to 300 mm. Further, the outer diameter of the resin skeleton is appropriately determined at 50 mm or more.

In the drain pipe, a plurality of resin block bodies are prepared and connected in series in the vertical direction. Two resin block bodies adjacent vertically in the vertical direction (longitudinal direction) are supported or compression-fixed by a fastening plate of a joint socket with a fastening plate. The resin block body may be a combination of a pair of left and right halved cylindrical bodies or a cylindrical body in which a through-hole into which a resin skeleton is fitted is formed at the center. When the resin skeleton and a resin block body is the same number, height H ₁ of the resin block body before assembly is preferably slightly larger than the height dimension of H ₂ resin block body after attachment to the resin skeleton . That is, the height dimension of the resin block body is reduced by compressing and fixing the retaining plate after being attached to the resin skeleton.

  As a resin block body, the combination body of a water-permeable resin block body and a water-impermeable resin block body, and a water-permeable resin block body are mentioned. The combination of a water-permeable resin block body and a water-impervious resin block body is a water-impermeable resin in a portion corresponding to an underground underground water channel when a drain pipe is installed in the ground and crosses an underground underground water channel. A block body is arrange | positioned and a water-permeable resin block body is arrange | positioned in the site | part other than that. As a result, surface water can be prevented from flowing directly into the groundwater through the drain pipe, and alteration of the groundwater quality can be prevented. Examples of the impermeable resin block body include styrene foam. In the drain pipe of the present invention, the resin block body does not have to be formed all around the resin skeleton. For example, the impermeable resin skeleton is used in a portion corresponding to the infiltration-improper ground above the underground underground water vein. In this case, the use of the resin block body can be omitted.

Examples of the water permeable resin block body include water permeable porous bodies. The water-permeable porous body is a monolith shape having continuous pores therein, and has a hardness that can be easily cut with a saw or the like. The physical properties of the water-permeable porous material include, for example, a density of 14.6 to 26 kg / cm ³ , a porosity of 17 to 18%, a bending strength (JIS A 9511) of 4.2 to 18.6 N / cm ² and a strain of 10%. The compressive strength is 5.6 to 12.8 N / cm, and the hydraulic conductivity (JIS A 1218) is 0.1 cm / second. Such a water-permeable porous body has sufficient compression resistance to withstand earth pressure. A commercially available product can be used as the water-permeable porous material. You may form many notch recessed parts which store water in the inner surface of a water-permeable resin block body. This increases the amount of water stored. Further, the notch recess may be formed in a spiral shape. Thereby, the amount of water storage can be increased while maintaining the strength of the resin block body.

  In the present invention, the plurality of resin skeletons and resin blocks are connected by a joint socket with a fastening plate. In the joint socket with a retaining plate, a disk-shaped retaining plate is screwed onto a screw formed on the outer peripheral surface of the joint socket (screw type socket), and the retaining plate is in the axial direction of the tubular joint socket. The one (integrated socket) attached integrally to the end portion can be mentioned.

  The screw-type socket connects the resin skeleton with a joint socket and compresses and fixes the resin block with a retaining plate. The integral socket connects the resin skeleton with a joint socket, and supports the resin block by sandwiching it from both ends with a retaining plate.

  Among the screw-type sockets, the joint socket for connecting the resin skeleton includes a substantially H-type socket (hereinafter simply referred to as “H-type socket”) having an annular inner wall having a central through hole, and a sleeve type without an inner wall. Socket. On the outer peripheral surface of the H-type socket and the sleeve-type socket, a male screw for screwing a retaining plate (ring) for supporting the resin block body is formed. Moreover, the internal peripheral surface may be formed with a female screw that is screwed with a male screw of the resin skeleton.

  The H-type socket is composed of a cylindrical socket body and an annular inner wall (鍔) that protrudes toward the axial center at the approximate center in the longitudinal direction of the socket body. The inner wall defines the longitudinal direction in the body. It is. One end surface of the cylindrical resin skeleton inserted from one opening is in contact with one surface of the inner wall, and one end surface of the cylindrical resin skeleton inserted from the other opening is the other surface of the inner wall. The two resin skeletons are connected to each other by abutting with. In addition, as a fixing method of a socket main body and a resin skeleton, fixing with a screw, fixing with an adhesive agent, screw fixing, etc. are mentioned.

  The sleeve type socket is obtained by omitting the inner wall of the H-type socket. That is, the sleeve type socket can connect two resin skeletons at any position in the longitudinal direction of the socket body, and can be attached at any position of one resin skeleton. The body can be connected. Similarly, the fixing method of the socket body and the resin skeleton includes fixing with screws, fixing with an adhesive, screw fixing, and the like.

  As shown in FIG. 7, the integrated socket has a cylindrical short main body 41 and an annular projecting outwardly integrally attached to one end portion of the outer peripheral surface in the axial direction (direction orthogonal to the diameter) of the main body 41. In this case, the resin skeleton is fitted from both sides, and the flange 51 supports the resin block body 3 (3a, 3b) from above and below. In this case, the resin block body 3 is not compression-fixed. Moreover, the resin block body 3a may be cylindrical, and the notch part of an upper-lower end is unnecessary.

  Among the joint sockets with fastening plates, in particular, those in which the fastening plates are screwed into the joint socket body by screws. That is, in the joint socket with a retaining plate, the resin skeleton is fitted and connected by the socket body, and the resin block body is compressed and fixed (supported) by the retaining plate. Thereby, the resin block body can be tightly fixed, and a drain tube having high strength can be obtained. The screw on the outer peripheral surface formed on the socket main body may be the entire outer peripheral surface or, for example, a part of the central portion in the vertical direction. The retaining plate is a disc-shaped member having a through hole formed in the center and is slightly thin, and the outer diameter is the same as or slightly smaller than the outer diameter (overall diameter) of the drain tube. An internal thread is formed on the inner periphery of the through hole at the center of the retaining plate. Thereby, it can be screwed together in the joint socket.

  In a joint socket with a fastening plate in which the fastening plate is screwed with a screw, the number of the fastening plates can be two. Thereby, the lower retaining plate compresses and fixes the lower resin block body, and the upper retaining plate compresses and fixes the upper resin block body. Thereby, in the case of one fastening plate, when the lower resin block body is compressed and fixed, to support the upper resin block body having the same dimensions as the lower resin block body, there is a possibility that the dimension is insufficient. By using two fastening plates, all of the plurality of resin block bodies may have the same dimensions, and all can be compressed and fixed. Moreover, since the compression rate can be determined arbitrarily, the water penetration rate can be set freely.

  Next, the drain pipe in the embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the rainwater infiltration facility 10 </ b> A includes a drain pipe 10, and the drain pipe 10 includes a drain pipe main body 1 constructed in the ground and an upper filter that is cued in the rainwater trough 8. 7. A joint 6c for connecting the drain pipe body 1 and the upper filter 7 is provided.

  The drain pipe body 1 includes a cylindrical resin skeleton 2, 2 a to 2 c in which a large number of drain holes 21 are formed on the peripheral surface, and a resin block body 3 disposed on the outer peripheral side of the resin skeleton 2, 2 a to 2 c, 3a-3c. Resin skeletons and resin block bodies having substantially the same length are prepared and connected in series. One resin block body 3 is a cylindrical body in which a central through hole into which the resin skeleton 2 is fitted is formed, and a notch into which the joint socket 4 is fitted is formed around the upper end of the through hole (FIG. 4B). ). In the drain pipe body 1, the first resin skeleton 2 is disposed between the end cap 9 and the first joint socket 4 of the H-type socket 6 with the first retaining plate (FIG. 4A). The first joint socket 4 is formed by forming a partial partition wall 42 through which a central portion partitioning the upper and lower chambers 43 and 44 is formed at an intermediate position in the length direction of the short cylindrical body 41 and having a substantially H-shaped cross section. (FIG. 4C). As a result, rainwater or the like flows down or is retained in the drain pipe, and the end position of the first resin skeleton 2 can be retained. The fixing method of the first joint socket 4 and the first resin skeleton 2 is not particularly limited, and examples thereof include screwing and adhesive fixing, and in this example, adhesive fixing by an adhesive. A male screw 45 is formed on the outer peripheral surface of the short cylindrical body 41 of the first joint socket 4. Further, the first retaining plate 5 is a disc-shaped ridge having a through hole 52 formed in the center, and a female screw 53 is formed on the inner peripheral surface of the through hole 52 (FIG. 4D). . Thus, the first retaining plate 5 is joined to the outer peripheral surface of the joint socket 4 by screwing.

  In the drain pipe body 1, the first resin block body 3 is compressed and fixed between the end cap 9 and the first retaining plate 5 of the H-type socket 6 with the first retaining plate. That is, the first resin skeleton 2 is fitted between the end cap 9 and the first joint socket 4, and the first resin block body 3 disposed around the first resin skeleton 2 is screwed into the first joint socket 4. It compresses and fixes by the 1st fastening plate 5 to join (FIG. 4 (A)). Thereby, since the 1st resin block body 3 adheres and fixes to the end cap 9 and the 1st fastening plate 5, it becomes a high intensity | strength.

  In the drain pipe body 1, the distal end portion (lower end portion) of the second resin skeleton 2 a is fitted into the chamber 44 on the opposite end side of the first joint socket 4 of the H-type socket 6 with the first retaining plate, and the second resin skeleton 2 The upper end portion of 2a is fitted into the chamber 43 on the distal end side of the second joint socket 4a of the H-type socket 6a with the second retaining plate. The tip (lower end) of the second resin block body 3a is on the first retaining plate 5 of the H-type socket 6 with the first retaining plate, and the upper end of the second resin block body 3a is on the H-shaped socket 6a with the second retaining plate. The second fastening plate 5a is fixed in close contact with each other.

  In the drain pipe body 1, the tip (lower end) of the third resin skeleton 2b is fitted into the chamber 44a on the opposite end side of the second joint socket 4a of the H-type socket 6a with the second retaining plate, and the third resin skeleton 2b. The upper end portion of 2b is fitted into the chamber 43b on the distal end side of the third joint socket 4b of the H-type socket 6b with the third retaining plate. The tip (lower end) of the third resin block body 3b is on the second retaining plate 5a of the H-type socket 6a with the second retaining plate, and the upper end of the third resin block body 3b is on the H-shaped socket 6b with the third retaining plate. The third fastening plate 5b is fixed in close contact with each other. The H-shaped socket 6a with the second retaining plate and the H-shaped socket 6b with the third retaining plate are the same as the H-shaped socket 6 with the first retaining plate.

  In the drain pipe main body 1, the distal end portion (lower end portion) of the fourth resin skeleton 2c is fitted into the chamber 44b on the opposite end side of the third joint socket 4b of the H-type socket 6b with the third retaining plate. The upper end portion of 2c is fitted into the chamber 43c on the distal end side of the fourth joint socket 4c of the H-type socket 6c with the fourth retaining plate. The tip (lower end) of the fourth resin block body 3c is on the third retaining plate 5b of the H-type socket 6b with the third retaining plate, and the upper end of the fourth resin block body 3c is on the H-shaped socket 6c with the fourth retaining plate. The fourth fastening plate 5c is fixed in close contact with each other. The H-shaped socket 6c with the fourth retaining plate is the same as the H-shaped socket 6 with the first retaining plate.

  In the drain pipe 10, the lower end portion of the upper filter 7 is fitted in the chamber 44c on the opposite end side of the joint socket 4c of the H-type socket 6c with the fourth retaining plate. The upper filter 7 is cued in the rainwater mass 8 and captures garbage mixed in rainwater. In addition, the rainwater etc. which flowed into the rainwater mass 8 flow into the drain pipe 10, and the rainwater etc. which exceeded the processing capacity of the drain pipe 10 flow into the sewer main pipe (see FIG. 1).

  Next, an example of a method for assembling the drain pipe 10 will be described. First, an end cap 9, four H-type sockets 6 with retaining plates, four resin skeletons 2, four resin block bodies 3, and an upper filter are prepared. The four resin block bodies 3 are both water-permeable porous bodies and are the same. First, the first resin block 3 is mounted on the outer peripheral surface of the first resin skeleton 2. At this time, no adhesive or the like is required. Next, the end cap 9 is filled at the tip of the first resin skeleton 2, and the H-type socket 6 with the first retaining plate is attached to the tip of the first resin skeleton 2 on the ground surface side. For this attachment, an adhesive is applied to the inner wall of the chamber 43 on the distal end side of the first joint socket 4 and then the first resin skeleton 2 is fitted. Thereby, the 1st resin frame 2 and the 1st joint socket 4 are fixed. Next, the first retaining plate 5 is rotated so as to advance downward (tightening direction), and the first resin block 3 is compressed and fixed. Thereby, the first resin block 3 is fixed by the end cap 9 and the first retaining plate 5.

  Next, the second resin block 3a is mounted on the outer peripheral surface of the second resin skeleton 2a. At this time, no adhesive or the like is required. Next, the tip of the second resin skeleton 2 a is attached to the chamber 44 on the opposite tip side of the first joint socket 4. For this attachment, an adhesive is applied to the inner wall of the chamber 44 on the opposite end side of the first joint socket 4 and then the second resin skeleton 2a is fitted. Thereby, the 2nd resin frame 2a and the 1st joint socket 4 are fixed. Next, the end portion on the ground surface side of the second resin skeleton 2a is fitted into the chamber 43a on the distal end side of the second joint socket 4a. Similarly, an adhesive is applied in advance to the inner wall of the chamber 43a of the second joint socket 4a. Next, the first fastening plate 5 is screwed into the second joint socket 4a and rotated so as to advance downward (tightening direction), thereby compressing and fixing the second resin block 3a. Thus, the second resin block 3a is fixed between the second retaining plate 5a and the first retaining plate 5. Thereafter, in the same manner, the third resin block 3b is fixed between the third retaining plate 5b and the second retaining plate 5a, and the fourth resin block 3c is disposed between the fourth retaining plate 5c and the third retaining plate 5b. Fixed.

  The drain pipe main body 1 is obtained by the above attachment method. Next, the upper filter is attached to the ground-side chamber 44c of the fourth joint socket 4c to the H-type socket 6c with the fourth retaining plate. Thereby, the drain tube 10 is obtained. The total length of the drain pipe 10 is appropriately determined depending on the size of the rainwater infiltration facility, but is usually several meters to several tens of meters.

  Next, the underground construction method of the drain pipe 10 will be described. First, an excavation hole in which the drain pipe 10 is built in the ground is constructed by an excavator equipped with an auger screw. The diameter of the excavation hole is the same as or slightly larger than the outer diameter of the drain pipe 10. Further, the length of the excavation hole may be substantially the same as the length of the drain pipe body 1. This length is the length at which the drain pipe 10 is sufficiently positioned on the penetration proper ground when the penetration inadequate ground and the penetration proper ground exist in the depth direction from the ground surface. Next, the drain pipe 10 obtained by the above method is installed in the excavation hole. Since the surrounding soil is buried by the collapse of the gap around the drain pipe 10, no subsequent backfilling material is necessary. According to the drain pipe 10, the resin skeleton 2 is fixed by the joint socket 4, and the resin block 3 is fixed by crimping by the retaining plate 5, so that the surface adhesion of the resin block 3 is increased and the erection is stabilized. Further, the drain pipe 10 can be easily inserted into the center of the excavation hole, and can be accurately inserted up to the planned depth. That is, when the casing is pulled out, it is possible to prevent the resin block body from rising together. Further, although depending on the degree of water permeability of the water-permeable resin block body, a large amount of storage per unit volume can be taken. Moreover, although the conventional rough sand has a variation in the water permeability coefficient, a uniform water permeability coefficient can be freely set by using the resin block body.

  Next, the underground construction method of the drain pipe 10 using a casing is demonstrated. First, the casing is built by placing it in the ground. The inner diameter of the casing is slightly larger than the outer diameter of the drain pipe 10, and the length of the casing may be substantially the same as the length of the drain pipe body 1. Next, the soil in the casing is discharged to the ground surface by an auger screw. Next, the drain pipe 10 is installed in the hollow casing. Next, the casing is pulled out to the ground surface. The gap around the drain pipe 10 is filled so that the surrounding soil pushed outward by the placement of the casing returns to its original state, so that no subsequent backfilling material is necessary. The installation of the drain pipe 10 using the casing does not decrease the drawing speed of the casing and does not require the introduction of rough sand as a backfill material.

  The drain pipe 10 of the present invention is not limited to the above embodiment, and various modifications can be made. When the ground is in the depth direction from the ground surface, it becomes an infiltration improper ground layer and an infiltration appropriate ground layer, an impermeable PVC pipe may be used as the resin skeleton in the portion corresponding to the infiltration inappropriate ground layer of the drain pipe, As the resin block, an impermeable resin block body may be used. Moreover, when underground underground water vein exists, you may arrange | position an impermeable resin block body in the site | part corresponded to underground underground water vein of a drain pipe.

  In the drain pipe 10 of the present invention, the water-permeable sheet is not an essential component, but may be attached to the resin skeleton, for example, on the inner peripheral surface. Since the water-permeable resin block body captures the suspended insoluble substance (SS) in water, the water-permeable sheet can be prevented from being clogged.

  In the drain pipe 10 of the present invention, the joint socket with the retaining plate may be only the joint socket with the fourth retaining plate on the ground surface side, and the other connection joints may be joint sockets without the retaining plate. In this case, the resin block between the end cap 9 and the fastening plate of the joint socket with the fourth fastening plate is compressed and fixed. Further, in the drain pipe 10, the joint socket with the retaining plate may be used in the joint socket with the second retaining plate and the joint socket with the fourth retaining plate, and the other connection joint may be a joint socket without the retaining plate. In this case, the resin block between the end cap 9 and the fastening plate of the joint socket with the second fastening plate and between the fastening plate of the joint socket with the second fastening plate and the fastening plate of the joint socket with the fourth fastening plate is compressed and fixed. It will be.

  The drain pipe 10 of the present invention can be applied not only to the penetration of rainwater or the like into the ground but also to the use of well water in an emergency or a circulation well by pumping water stored in the drain pipe 10 with a pump.

  In the drain pipe 10 of the present invention, the retaining plate is not limited to the above embodiment, and may have a stepped cross-sectional structure in which the plate thickness around the central through hole is increased. By increasing the plate thickness around the through-hole, the thread is increased and the screwing strength is improved.

  In the case of the H-type socket, notches 33 for avoiding the joint socket body are formed at the upper and lower ends of the resin block body. The depth of the notch 33 is reduced by the installation position of the resin block body and compression. It may be determined in consideration of the rate.

  In the drain pipe 10 of the present invention, the sleeve type socket and the integral type socket may be used so as to support only the resin block body by attaching to the middle of one resin skeleton without connecting the resin skeleton.

  ADVANTAGE OF THE INVENTION According to this invention, it can embed in the ground and can construct | assemble a vertical rainwater infiltration facility, and can respond to a recent urban flood. In addition, the drain pipe can be stably constructed underground, and the use of the conventional backfill material can be omitted.

DESCRIPTION OF SYMBOLS 1 Drain pipe body 2, 2a-2c Cylindrical resin frame 3, 3a-3c Resin block body 4, 4a-4c Joint socket 5, 5a-5c Clasp plate 6, 6a-6c Joint socket with clasp plate 7 Upper filter 8 Rainwater mass 9 End cap 10 Drain pipe 10A Rainwater infiltration facility

Claims (7)

  A drain pipe embedded in the ground and used for infiltration of rainwater and the like into the ground and pumping up groundwater, a cylindrical drain pipe resin skeleton, and a resin block body disposed outside the drain pipe resin skeleton The drain tube resin skeleton and the resin block body are respectively connected in series, and at least one of the connections is connected by a joint socket with a fastening plate. A drain tube characterized by being.   The drain pipe according to claim 1, wherein the fastening plate-attached joint socket is configured such that the fastening plate is screwed into a screw formed on an outer peripheral surface of the joint socket.   2. The drain pipe according to claim 1, wherein the fastening plate-attached joint socket has a fastening plate integrally attached to an end portion in the axial direction of the tubular joint socket. The drain pipe according to claim 1 or 2, wherein the joint socket of the joint socket with the fastening plate connects the drain pipe resin skeleton, and the fastening plate supports the resin block body.   The drain tube according to any one of claims 1 to 4, wherein the resin block body is a combination of a water-permeable resin block body and a water-impermeable resin block body, or a water-permeable resin block body. .   The drain pipe according to claim 5, wherein the water-permeable resin block body is a water-permeable porous body.   The drain pipe according to any one of claims 1 to 6, wherein the resin block body is an assembled cylindrical body of a cylindrical body or a half-divided cylindrical body.

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