JP2011137354A - Drainage device for field - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drainage device for a field, which has a draining function for draining a field, and can prevent an outflow of earth and sand, rubber chips, other field fillers or lawnmowing residues, which flow over a field surface layer, by filtering. <P>SOLUTION: In a basic structure having a side ditch 2 partially or entirely provided on the circumference of an artificial lawn field 1, the downstream terminal end of the side ditch being connected to a main drainage channel 100, a weir section 3 is provided at one or two or more proper points including at least a downstream position from a boundary portion of the field 1 of the side ditch so as to straddle a lower portion within the side ditch, and a water-permeable pipe 4 is laid on the bottom within the side ditch so as to extend through the weir portion in a watertight state, the upstream end portion of the water permeable pipe being closed. Particulate materials A flowing into the side ditch from the field surface layer are filtered by the water-permeable pipe to prevent outflow thereof from the field facility, and only rainwater is discharged to the main drainage channel through the water permeable pipe. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a ground drainage device, and more particularly, drainage having a filtration function for preventing outflow of particulate matter and lawn mowing residue in a ground such as a clay coat, clay ground or artificial turf ground, or natural turf ground. It relates to the device.

  In recent years, artificial turf ground has rapidly spread due to advantages such as low running costs and use without being influenced by the weather, such as baseball fields, soccer fields, rugby fields, American football fields, and hockey fields. It was. Artificial turf used for such a purpose has a synthetic resin turf planted on a thermoplastic resin base fabric, and a backing layer is formed by a synthetic resin material cross-linked to the back of the base fabric. Between these, a hard granular material made of inorganic particles such as sand or an organic granular material and a rubber chip elastic granular material are filled to increase the cushioning property.

  In these conventional artificial turf grounds, rainwater is drained by passing through the base sheet of permeable artificial turf from the base elastic layer to the roadbed layer and the roadbed, but the excess water that cannot penetrate completely It flows through the ground surface and drains from the gutter. At this time, particulate matter such as sand and rubber chips filled between the artificial turf leaves flows out of the ground along the water flow and flows out through the side grooves. Similarly, granular materials such as sand also flow out in clay courts and clay grounds. On the other hand, in natural turf ground, it is necessary to perform the work of cutting frequently grown turf leaves with a lawn mower, and the cut turf leaves are sucked and collected, but it is difficult to completely remove them. The lawn mower remains on a rainy day.

  In this way, if particulate matter or lawn mowing residue that has flowed out of the ground flows out to the outside through the side gutter, it accumulates in drainage grooves and drainage pipes outside the ground, impairs the original drainage function, or imposes a burden on sewage and rainwater treatment plants. May cause social problems or environmental problems.

  Therefore, a structure for preventing the outflow of particulates such as sand in the artificial turf ground has been proposed. In Patent Document 1, a first artificial lawn containing sand is laid on a stable base, a side groove is formed at an end of the stable base, and the end of the stable base adjacent to the side groove is The first artificial lawn does not exist, a permeable block is laid on the part, and a pile lower than the pile height planted on the first artificial lawn base fabric is placed on the block. An end sand retaining structure for a sand-containing artificial lawn in which a second artificial lawn formed by flocking is laid is disclosed. Further, in Patent Document 2, in the area where the artificial turf is laid, the artificial turf laid on the edge side has a pile density of 1. than the artificial turf laid on the area inside the edge. Drainage groove edge provided outside the area where the artificial turf is laid, and the pile length is longer, the pile is crimped, the yarn width is reduced, and the artificial turf is laid Artificial turf in which artificial turf is filled with a filler spaced from the portion is disclosed.

  On the other hand, Patent Document 3 discloses that an artificial turf coat or ground in which sand is mixed into an artificial lawn or an artificial turf coat or ground in which a drainage groove such as a U-shaped groove is installed around the ground. An artificial turf for preventing sand spills formed by an artificial turf having a height higher than the height of the artificial turf coat or ground artificial turf includes the upper surface of the drain groove cover, and the artificial turf coat or ground containing sand drain and sand A sand spill prevention structure in a coat or ground such as artificial turf with sand laid between the two is disclosed.

  JP 2000-160505 A   JP 2006-207337 A   JP 2001-323407 A

  The structures described in Patent Documents 1 to 3 described above all prevent sand and the like before flowing into the side grooves, and although a certain effect can be expected, the structures of Patent Documents 1 and 2 have strong wind and rain. There is a risk that particulates and the like may flow out into the side groove beyond the outflow prevention region, and the structure of Patent Document 3 is excellent in the effect of preventing outflow of particulates and the like because the side groove is completely hidden, but in the side groove It will be a hindrance to the maintenance of each, and both have advantages and disadvantages. Moreover, it is not assumed to be applied to clay courts, clay grounds and natural turf grounds.

  Therefore, in order to solve the above-mentioned problems, the present invention has a drainage function for draining ground water, and filters ground sand and rubber chips and other ground fillings and lawn mowers that flow and flow out of the ground surface layer. An object of the present invention is to provide a ground drainage device capable of preventing outflow to the outside.

  In order to achieve the above object, the present invention provides a ground drainage device in which a side groove is provided in part or all of the periphery of the ground, and a downstream terminal end of the side groove is connected to the main drainage groove. A permeable pipe is provided at one or a plurality of appropriate positions including a position downstream of the ground boundary so as to block the lower part in the side groove, and penetrates the dam part in a watertight state to the bottom part in the side groove. In addition, the upstream end of the permeable pipe is closed, and particulate matter that has flowed into the gutter from the ground surface layer is filtered through the permeable pipe to prevent outflow from the ground facility, and only rainwater is removed. A ground drainage device is configured to drain into the main drainage channel through the water permeable tube (Claim 1).

  Here, it is preferable that the vicinity of the upstream side end portion of the water permeable tube is fixed by the supporting means inside the side groove so as not to block the lower part in the side groove (Claim 2). In this case, the support means is provided with a split member connecting and fixing the water permeable tube from above and below, and a fixing member that is bolted and held on the inner wall of the side groove is provided integrally or detachably. Is more preferable (Claim 3).

  Further, it is preferable that the dam portion on the most downstream side is provided at a connection portion between the downstream end portion of the side groove and the main drainage groove.

  Further, it is also preferable that a dam plate for closing the inside of the side groove is provided integrally or detachably on the connecting member having a split structure that sandwiches and fixes the water permeable tube from above and below to form the dam portion. 5).

  The water permeable tube is preferably a water permeable corrugated tube.

  And the effect is more remarkable when the ground is an artificial turf ground filled with particulates such as sand and rubber chips.

  According to the ground drainage device of the present invention as described above, in the ground drainage device in which a side groove is provided in part or all of the periphery of the ground, and the downstream end portion of the side groove is connected to the main drainage groove, A dam portion is provided so as to block the lower portion in the side groove at one or a plurality of appropriate positions including the downstream side position at least from the ground boundary portion of the side groove, and the dam portion penetrates the bottom portion in the side groove in a watertight state. Since the permeable pipe was laid and the upstream end of the permeable pipe was further closed, rainwater containing particulate matter such as sand and rubber chips that flowed from the ground into the side groove at the dam part provided at the bottom of the side groove first. Rainwater containing particulate matter collected in the gutter can be prevented from flowing out as it is, and then filtered through a permeable pipe laid so as to penetrate the weir at the bottom of the gutter, and only the rainwater is permeated. It is possible to drain into the ground outside the facility through a tube.

  Here, the diameter and length of the water permeable tube may be determined in consideration of drainage capacity, and it is not necessary to provide a water permeable tube over the entire length of the side groove, and it is laid only on a part of the downstream side of the side groove. Therefore, a filtration drainage function can be added to a normal gutter at a minimum necessary cost. In addition, the side groove is usually provided with a lid such as a grating lid. However, if this lid is removed, excessively accumulated particulate matter in the side groove can be easily sucked with a suction device such as a vacuum cleaner. So that the filtration function can be easily restored, and the particulate matter removed from within the gutter can be sprinkled back to the ground.

  Then, by fixing the vicinity of the upstream end of the water permeable tube so that the lower portion in the side groove is not blocked inside the side groove by the supporting means, the position of the water permeable tube is displaced due to the water flow or water pressure in the side groove. It is possible to secure the drainage capacity as designed without any shrinkage or shrinkage. In this case, as a supporting means for fixing the vicinity of the upstream side end portion of the water permeable tube, a fixing member for holding the water permeable tube by bolting the inner wall of the side groove to a connecting member having a split structure that sandwiches and fixes the water permeable tube from above and below. By adopting a structure in which the members are provided integrally or detachably, the workability is excellent and the water permeable tube can be fixed securely.

  The effect is remarkable when the ground is an artificial turf ground filled with granular materials such as sand and rubber chips. In addition, even in clay courts and clay grounds in which sand or soil is pressed, sand or soil can be prevented from flowing out of the ground, and there is a certain effect. Furthermore, even in a natural turf ground, the lawn mowing residue can be prevented from flowing out of the ground, which is effective.

  The ground drainage device of the present invention has a water-permeable corrugated pipe laid in a side groove, and a downstream end of the water-permeable corrugated pipe penetrates the weir part in a watertight state, and an upstream end of the water-permeable corrugated pipe It is possible to simply close the upstream end by a connecting member having an upper and lower split structure for connection, and bolt a fixing member provided integrally or detachably to the connecting member to the inner wall of the side groove. Since it is a structure, construction is easy, and it can be made into a drainage facility having an excellent filtration function at low cost.

It is sectional drawing of the surface which shows the drainage apparatus of the ground which concerns on this invention, and crosses a side groove. It is a fragmentary sectional view showing an example of artificial grass ground. It is sectional drawing of the surface which cuts the side groove | channel which shows the ground drainage apparatus which concerns on this invention. It is a partial top view similarly. It is a perspective view which shows the structure holding a water-permeable tube. It is sectional drawing of the surface which shows other embodiment of the ground drainage apparatus which concerns on this invention, and cuts a side groove | channel longitudinally. It is a partial top view similarly. It is a disassembled perspective view which shows the relationship between a connection member and a dam plate. It is a fragmentary sectional view which shows the structure which attaches a weir board to a side groove side wall with a volt | bolt stop. It is a fragmentary sectional view which shows the structure which engages and installs a weir board in the clearance gap formed in the connection part of a U-shaped block. It is a partial side view of the water-permeable corrugated pipe | tube which has a mesh-shaped water-permeable surface. It is a partial side view of the water-permeable corrugated pipe | tube which has many small holes.

  Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. 1 to 5 show a ground drainage device of the present invention, in which 1 is an artificial turf ground, 2 is a gutter, 3 is a weir, 4 is a water permeable tube, 5 is a blocking member, 6 is a support means, Reference numeral 7 denotes a lid. In the figure, reference numeral 100 denotes a main drain groove, and 101 denotes a side wall of the main drain groove. In this embodiment, the case where a drainage device is provided on the artificial turf ground 1 is illustrated, but it is obvious that the present invention can also be applied to a general clay coat, clay ground, and natural turf ground. The main drain 100 may be a culvert.

  The ground drainage device according to the present invention is provided with a side groove 2 in a part or all of the periphery of the artificial turf ground 1, and the downstream end of the side groove 2 is connected to the main drainage groove 100. 2 is provided at one or a plurality of appropriate positions including a position downstream from the boundary portion of the ground 1 so as to block the lower portion in the side groove 2, and the dam portion 3 is watertight at the inner bottom portion of the side groove 2. The water permeable tube 4 is laid so as to penetrate through, and the upstream end of the water permeable tube 4 is further closed, and the particulate matter flowing into the side groove 2 from the ground surface layer is filtered through the water permeable tube 4 and grounded. In addition to preventing the outflow from the facility, only rainwater is drained into the main drain 100 through the water permeable tube 4. The upper end of the side groove 2 is covered with a water permeable lid 7 such as a metal grating lid. In the present invention, the boundary portion of the ground 1 indicates a position on the most downstream side where rainwater that has fallen on the ground 1 flows directly into the lateral groove 2.

  The artificial turf ground 1 has a structure in which a ground layer 9 is formed on a ground 8, and an artificial turf 10 filled with granular materials A such as sand and rubber chips is laid thereon. In the present invention, it is not necessary to limit the structure of the artificial turf ground 1, but the effect becomes remarkable when the granular material A includes a rubber chip having a small specific gravity and easily flowing out.

  As shown in FIGS. 3 and 4, the general drainage device has the downstream end portion of the side groove 2 connected to the side wall 101 of the main drainage groove 100. In the present embodiment, the weir portion 3 on the most downstream side is provided at the connection portion between the downstream end portion of the side groove 2 and the main drainage groove 100. The dam portion 3 has an opening provided on the side wall 101 of the main drainage groove 100 so as to communicate with the side groove 2 passing through the end of the water permeable tube 4 and facing the main drainage groove 100. In the state, it is filled with concrete and constructed as a concrete wall. Alternatively, the weir portion 3 is constructed by inserting the end portion of the water permeable tube 4 into the insertion hole 102 opened in the side wall 101 of the main drainage groove 100 and closing the gap with the sealing material 103.

  Then, the upstream end of the water permeable tube 4 is closed by the closing member 5, and the vicinity of the upstream end is fixed by the support means 6 inside the side groove 2 so as not to close the lower part in the side groove 2. . In the present embodiment, the support means 6 includes a connecting member 11 having a split structure that sandwiches and fixes the water permeable tube 4 from above and below, and a fixing member 12 that is bolted and held to the inner wall of the side groove 2. The structure was provided so as to be detachable.

  Specifically, the connecting member 11 includes a pair of metal members 11A and 11B formed by bending connecting pieces 14 and 14 at both ends of a semi-cylindrical body portion 13 that is divided into two vertically, and the pair of metal members 11A. , 11B are arranged in the vicinity of the upstream end portion of the water permeable tube 4, and are sandwiched from above and below with a sealing material or a buffer material (not shown) interposed between the water permeable tube 4 and the body portion 13, and connected to each other. The pieces 14, 14 are connected by tightening them with bolts and nuts 15 from above and below. The fixing member 12 is an L-shaped member provided integrally or detachably on the connecting pieces 14, 14 of one metal member 11 </ b> A of the connecting member 11. The horizontal piece 16 of the fixing member 12 is welded to the connecting piece 14 or fastened using the bolt and nut 15. Further, the vertical piece 17 of the fixing member 12 is fixed to the side wall of the side groove 2 with a concrete anchor bolt 18.

  As the water permeable tube 4, a water permeable corrugated tube as shown in FIG. 9 or 10 is used. Moreover, when providing the said dam part 3 in multiple places, the dam parts 3 other than the most downstream side are comprised with a stainless steel dam plate as mentioned later. If the most downstream weir portion 3 is not provided integrally with the side wall 101 of the main drainage groove 100 at a position downstream of the ground boundary, the most downstream weir portion 3 is also made of stainless steel weir. It is preferable on construction that it is composed of a plate. Of course, the dam portion 3 may be formed by placing a concrete wall.

  As shown in FIGS. 1 and 3, the side groove 2 is formed by crushing a crusher run 19 at the bottom of a groove formed by digging the ground partly or entirely around the artificial turf ground 1, Of the U-shaped blocks 20... Are arranged in parallel, and in order to secure a desired depth, concrete is placed on both sides of the U-shaped block 20 to form a side wall 21 extending upward. And built. Here, the side wall of the U-shaped block 20 and the inner surface of the side wall portion 21 are flush with each other. Further, the side groove 2 is provided with a slight inclination along the direction of drainage.

The structure of the artificial turf ground 1 of this embodiment will be briefly described with reference to FIGS. 1 and 2. First, the impervious layer 22 is formed by spraying a highly permeable cationic asphalt emulsion on the surface of the ground 8 that has been scraped from the existing roadbed or the surface of the existing roadbed to correct the unevenness and rolled. The base layer 9 is provided on the water-impermeable layer 22, and the artificial turf 10 is further laid. The base layer 9 is formed by laying a crusher run to a thickness of 80 to 200 mm and rolling. The drainage layer 23 and a drainage ascon layer 24 formed by applying an asphalt concrete pavement having a thickness of 30 to 70 mm and an open particle size of 10 ⁻² cm / sec or more on the drainage layer 23.

  A portion of the ground 8 adjacent to the side groove 2 is slightly dug down and a single grain crusher run is laid to form a drainage layer 23. Inside the drainage layer 23, a plate-like underdrain pipe made of a planar drain or planar drainage material is appropriately laid to drain the rainwater that has permeated in the direction of the side groove 2. In this case, the height of the upper end of the U-shaped block 20 is made to substantially coincide with the level of the water-impermeable layer 22, and a drainage port (not shown) continuous with the drainage layer 23 is provided above the side wall 21. It is preferable to provide at the time of placing.

  In the present embodiment, the artificial turf 10 is exemplified by a long pile artificial turf with rubber chips for use in intense sports such as soccer, rugby, and American football that fall over or slide. In such an artificial turf 10, turf leaves 26,... Are vegetated on a water-permeable base sheet 25, and a filler 27 in which rubber chips and particle size adjusting sand are mixed is filled between the turf leaves 26. For example, the length of the turf leaf 26 is 65 mm, and the thickness of the filler 27 is about 40 mm. Here, it is preferable to construct the artificial turf 10 so that the impact absorption rate is 60% to 80%. When the artificial turf 10 does not have sufficient shock absorption, an underpad layer is formed on the drainable ascon layer 24, and the artificial turf 10 is laid thereon.

  Since the water permeable tube 4 is provided with a fixed length of, for example, 5 mm, it is used by connecting it with the connecting member 11. In other words, the pair of metal members 11A and 11B of the connecting member 11 are disposed across the joint portion of the water permeable tubes 4 and 4, and a sealing material is interposed between the water permeable tube 4 and the body portion 13 from above and below. By sandwiching, the connecting pieces 14 and 14 are tightened and connected with bolts and nuts 15 from above and below. Here, when a plurality of the water permeable tubes 4 are connected and used, it is not preferable that the intermediate portion meanders or expands or contracts with a water flow or a water pressure. It is also preferable to fix the connecting member 11 to the side wall of the side groove 2 using the fixing member 12.

  The function of the drainage device of the present invention configured as described above will be described with reference to FIGS. The inside of the side groove 2 is at least downstream from the boundary portion of the ground 1 and is closed by the dam portion 3. And it is laid in the bottom part of the side groove | channel 2 so that the downstream end part of the water-permeable tube 4 may penetrate the said dam part 3. FIG. Therefore, even if the granular material A such as sand and rubber chips in the artificial turf ground 1 flows into the inside of the side groove 2 together with rainwater, and flows into the downstream side of the side groove 2, it is stopped by the weir part 3 on the most downstream side. In addition, since the upstream end of the water permeable tube 4 is closed, only the rainwater is filtered through the water permeable tube 4 and drained into the main drain groove 100 through the inside of the water permeable tube 4. The granular material A accumulates at the bottom of the side groove 2, and when rainwater is drained and dried, it can be sucked out by a suction device such as a vacuum cleaner. The granular material A removed from the side grooves 2 can be sprayed from the upper surface of the artificial turf 10 and reused.

  Further, when the dam portions 3,... Are provided at a plurality of locations, the particulate matter A that has flowed into the side groove 2 between the dam portions 3, 3 cannot pass through the dam portion 3 on the downstream side, and is deposited at that position. To do. This configuration is advantageous when the granular material A flows in a large amount. That is, it is possible to prevent the granular material A that has flowed into the side groove 2 in a large amount from burying the water permeable tube 4 and failing to perform the filtration drainage function. In order to provide a drainage function even when an unexpected large amount of rainwater flows into the side groove 2, the dam portion 3 is not provided over the entire cross section of the side groove 2, but limited to the lower part of the side groove 2. It is also preferable to allow a large amount of rainwater to overflow from above the weir part 3.

  Further, when the water-permeable tube 4 is clogged due to use over time, after removing the accumulated particulate matter A as described above, the particulate matter A is washed away from the outside of the water-permeable tube 4 by a high-pressure water flow. Alternatively, the filtration function can be recovered by supplying a large amount of water to the inside of the water permeable tube 4 and ejecting the water to the outside to wash away the particulate matter A, that is, backwashing.

  Next, based on FIG. 1, FIG. 6, FIG. 7, and FIG. 8, when the dam portion 3 is provided at a plurality of locations, the dam plate 28 constituting the upstream dam portion 3 will be described. The dam plate 28 is made of stainless steel sheet metal, and has a size so as to close the inner lower portion of the side groove 2. The dam plate 28 is formed with an opening 29 that penetrates the water permeable tube 4, and is welded to one body portion 13 of the metal members 11 </ b> A and 11 </ b> B constituting the connecting member 11. Further, flange portions 30 and 30 are formed at right angles on both side edges of the barrier plate 28, and the flange portions 30 and 30 are formed on the inner wall of the U-shaped block 20 as shown in FIG. It is fixed with concrete anchor bolts 18. In the illustrated example, the groove width of the U-shaped block 20 is 450 mm, and the diameter of the water permeable tube 4 is 300 mm.

  In this embodiment, the dam plate 28 is integrally welded to the body portion 13 of the metal member 11B. However, the dam plate 28 is detachably connected to the body portion 13 by bolts, nuts, or the like. You may do it. Moreover, although the said dam plate 28 formed the flange parts 30 and 30 on both sides, it is also preferable to form a flange part also in a lower end and to raise the rigidity of this dam plate 28 more.

  Thus, after fixing the said dam plate 28 to the lower part of the side groove 2, and providing the permeable pipe 4 through the opening 29 of this dam plate 28, between the said dam plate 28 and the inner surface of the side groove 2, and A sealing material is filled between the opening 29 of the weir plate 28 and the water permeable tube 4 to stop the water, so that the water is not drained through other than the inside of the water permeable tube 4. Since the water permeable tube 4 is fixed inside the side groove 2 via the connecting member 11 and the dam plate 28, a drainage device having a filtration function as initially designed is not displaced inside the side groove 2. Can be maintained.

  Further, as shown in FIG. 10, the lower edge and both side edges of the barrier plate 28 are engaged with and held in a gap 31 formed in the connection portion of the U-shaped blocks 20, 20 constituting the side groove 2. Is also possible. However, when the dam plate 28 and the connecting member 11 are integrated, it is rare that the position of the connecting portion of the water permeable tubes 4 and 4 and the position of the connecting portion of the U-shaped blocks 20 and 20 coincide. Therefore, it is necessary to separately connect the connecting portions of the water permeable tubes 4 and 4 using the single connecting member 11, which increases costs.

  As shown in FIG. 11, the water permeable tube 4 used in the present embodiment is a water permeable corrugated tube having a structure in which a mesh-shaped water permeable surface 32 is held by a spiral synthetic resin reinforcing material 33. Alternatively, as shown in FIG. 12, the water permeable tube 4 is a water permeable corrugated tube having a structure in which a cylindrical portion 35 having a large number of small holes 34,. Here, the mesh-like water-permeable surface 32 or the small hole 34 of the cylindrical portion 35 has an opening size such that the target granular material A and lawn mowing residue do not pass through.

1 artificial grass ground, 2 gutters,
3 Weir, 4 Permeable pipe,
5 occlusion member, 6 support means,
7 lid, 8 ground,
9 ground layer, 10 artificial grass,
11 connecting member, 11A, 11B metal member,
12 fixing members, 13 trunks,
14 connecting pieces, 15 bolts, nuts,
16 horizontal pieces, 17 vertical pieces,
18 anchor bolts, 19 crusher runs,
20 U-shaped block, 21 side wall,
22 impermeable layer, 23 drainage layer,
24 drainage ascon layer, 25 base sheet,
26 turf leaves, 27 fillers,
28 dam plate (dam part), 29 opening,
30 flange, 31 gap,
32 water permeable surface, 33 synthetic resin reinforcement,
34 small holes, 35 cylinders,
100 main drain, 101 side wall,
102 insertion hole, 103 sealing material,
A granular material.

Claims (7)

  In the ground drainage device in which a side groove is provided in part or all of the periphery of the ground, and the downstream end portion of the side groove is connected to the main drainage groove, the position including the downstream side of at least the boundary portion of the ground is included. A dam portion is provided at one or a plurality of appropriate locations so as to block the lower portion in the side groove, and a permeable tube is laid in the bottom portion of the side groove so as to penetrate the dam portion in a watertight state, and further upstream of the permeable tube. The side ends are closed, and the particulate matter that flows into the side groove from the ground surface layer is filtered through the water permeable pipe to prevent outflow from the ground facility, and only rainwater is drained into the main drainage groove through the water permeable pipe. Ground drainage device characterized by that.   The ground drainage device according to claim 1, wherein the vicinity of the upstream end portion of the water permeable tube is fixed to the inside of the side groove by a supporting means so as not to block the lower portion in the side groove.   3. The fixing member is provided with a fixing member that is bolted to an inner wall of the side groove and is detachably provided on a connecting member having a split structure that sandwiches and fixes the water permeable tube from above and below. Ground drainage equipment.   The ground drainage device according to any one of claims 1 to 3, wherein the weir portion on the most downstream side is provided at a connection portion between the downstream end portion of the side groove and the main drainage groove.   The connecting member having a split structure that sandwiches and fixes the water permeable tube from above and below is provided with a dam plate for closing the inside of the side groove so as to be integrated or detachable, and is used as the dam portion. Ground drainage device as described.   The ground drainage device according to any one of claims 1 to 5, wherein the water permeable tube is a water permeable corrugated tube.   The ground drainage device according to any one of claims 1 to 6, wherein the ground is an artificial turf ground filled with granular materials such as sand and rubber chips.

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