JP5582600B2 - Ground water drainage structure and construction method - Google Patents

Description

  The present invention relates to a ground water drainage structure for draining ground and turf ground water (hereinafter referred to as “ground water”) in a competition ground, a park, and the like, and a construction method therefor.

  Groundwater drainage for sports grounds such as golf, soccer, tennis, baseball, and athletics, parks, etc., bury water pipes such as porous pipes, and implement materials with good water permeability around the pipes and water guides. Many construction methods have been proposed (see Patent Documents 1 to 3).

  For example, in Patent Document 1, as a ground drainage structure capable of draining rainwater and the like efficiently and sufficiently, rainwater or the like that has fallen or sprinkled on the ground in FIG. 3 is permeable to the entire surface of the ground. The artificial artificial lawn 33 and the water-permeable asphalt layer 32 are transmitted. And the rainwater etc. which permeate | transmitted the asphalt layer 32 permeate | transmit the underdrain 34 embedded in the crushed stone layer 31, and are drained. On the other hand, it is disclosed that rainwater or the like that has passed through the asphalt layer 32 is drained into the side groove 35 at the periphery of the ground.

  In Patent Document 2, as a floor soil drainage structure that enhances the drainage capacity of the ground soil on the turf ground in order to improve the vegetation of the turf such as the ground, the top soil of the ground on which the grass is vegetated is removed in FIG. The main soil 41 is exposed, the main drainage groove 42 is excavated, branch drainage grooves 43 are provided on the left and right sides of the main drainage groove 42, and pumice 44 is provided on the bottom of the main drainage groove 42 and the bottom of the branch drainage groove 43. The main drainage pipe 45 and the branch drainage pipe 46 are laid thereon, the branch drainage pipe 46 is connected to the main drainage pipe 45, and the pumice 44 is put on the main branch drainage pipe 45, and the main branch drainage groove 42. Fill. Further, it is disclosed that a sand-proof net 47 is laid on these grooves, sand 48 is laminated thereon, turf is vegetated on the upper surface of the sand 48, and the main drain pipe 45 is connected to an adjustment rod.

  Further, in Patent Document 3, in order to improve drainage performance of outdoor facilities, grounds, etc., a roadbed layer 52 formed by laying and rolling volcanic gravel on a leveled roadbed 51 in FIG. 5 has a predetermined thickness. Then, loam soil is laid on the roadbed layer and rolled to form a middle layer 53 having a predetermined thickness. In the middle layer, vertical holes 54 having a predetermined diameter are arranged at an appropriate pitch. A water repellent aggregate is laid on the middle layer, and the vertical hole is filled with the drainage core 55. The loam soil is added to the water-repellent aggregate on the middle layer, the two are mixed, and the surface layer 56 is formed by unevenness leveling and rolling. Moisture due to rain or the like accumulates from the surface layer through the drainage core and accumulates in the roadbed layer, and is discharged here or used for maintaining the surface humidity by water retention. It is disclosed that if a conduit pipe 57 is provided on the road bed 51, drainage is promoted and the humidity of the surface layer can be appropriately maintained by adjusting the drainage amount of the conduit pipe.

JP 2009-102913 A JP 2007-2111546 A JP-A-10-219606

  However, the conventional method described in the patent document has the following problems.

  In each of Patent Documents 1 to 3, a culvert buried in a crushed stone layer is formed in the original ground, a side groove is provided in the periphery of the ground, and a material with good water permeability is required around the pipe and the water guide section. Therefore, the construction becomes large, the construction period becomes longer, and the construction cost increases.

  Therefore, the present invention uses a waste melting furnace granulated slag, which is an inexpensive recycling material, as a drainage material, and can obtain a high drainage effect with simple construction without using a culvert drain pipe, and can be used for conventional construction. The ground water drainage structure and its construction method which can shorten a construction period compared with are provided.

The invention of claim 1 is a ground water drainage structure for draining ground water from grounds of various facilities including schools, athletic grounds or in parks. in ground water drainage structure, characterized in that the formation of the drainage longitudinal holes filled with waste melting furnace slag obtained by rapidly crushing melt produced by melting treatment at a higher temperature than in the water to the ground surface is there.

The invention according to claim 2 is the ground water drainage structure according to claim 1, wherein a water conduction layer is formed by a waste melting furnace granulated slag layer under the surface layer of the ground.

The invention according to claim 3 is the ground water drainage structure according to claim 1 or 2, wherein a turf surface is formed on a vertical drainage hole filled with waste melting furnace granulated slag.

According to the invention of claim 4 , drainage vertical holes are excavated in the grounds of various facilities including schools for draining groundwater, competition grounds or grounds in parks , and general waste and industrial waste are discharged into the excavated drainage vertical holes. Filling the waste melting furnace granulated slag obtained by rapidly crushing the melt generated by melting at a high temperature of 1200 ° C or higher in the waste melting furnace with water, and pouring water from the top of the packed bed It is a construction method of a ground water drainage structure characterized by forming a vertical drainage hole filled with waste melting furnace granulated slag by water closing.

According to the fifth aspect of the present invention, the surface layer portion in the drainage area is scraped before excavation of the drainage vertical hole, the drainage vertical hole is excavated, and the drainage vertical hole filled with the waste melting furnace granulated slag is formed, and then the waste is melted. 6. The ground water drainage construction method according to claim 5, wherein the granulated slag layer and the ground surface layer are formed thereon.

According to the sixth aspect of the present invention, the turf ground in the drainage area is scraped before excavation of the drainage vertical hole, the drainage vertical hole is excavated, and the drainage vertical hole filled with the waste melting furnace granulated slag is formed. It is formed, It is a construction method of the ground water drainage structure of Claim 5 characterized by the above-mentioned.

  In the present invention, the vertical cross-section of the drainage vertical hole is circular or rectangular. In the case of a circular drainage vertical hole, for example, a diameter of φ200 to φ700 mm is recommended, but other diameters may be adopted. The vertical hole depth for drainage is, for example, 1 to 5 m, although it depends on the formation conditions. However, the waste melting furnace granulated slag filling work from the surface part shall be possible. Although the space | interval of the vertical hole for drainage is determined by the relationship with formation conditions and the depth of a vertical hole, it is a 2-10m space | interval, for example.

  In the present invention, the waste melting furnace granulated slag to be filled in the drainage vertical hole varies depending on the treatment plant equipped with the waste melting furnace, but is still granulated, crushed after granulation, or ground after granulation It is possible to use any of those that have been crushed and ground after crushing.

  The present invention eliminates the need for conventional pipe laying in drainage structures with gutters and side grooves and fine level adjustment of the gland, greatly increasing work efficiency, shortening the number of work days on site, shortening the closing period of the gland, Construction costs can be shortened.

  In the present invention, when drainage is improved, drainage vertical holes are formed in the ground by directly constructing drainage vertical holes in the ground and filling it with waste melting furnace granulated slag. If it reaches the sand layer, water flows as a culvert, and if it does not reach it, water is stored as an underground pool, improving drainage, and the structure is simple.

The waste melting furnace granulated slag of general waste and industrial waste is treated at a high temperature of 1200 ° C or higher, and weeding measures after construction are unnecessary or greatly reduced because it does not contain weed species in the material. .

  The present invention is a construction method that can cope with the improvement of the ground as a whole and the improvement of only the area where drainage improvement is required, and it is possible to obtain a high effect by simple construction to partially improve the location where drainage is poor.

  In the present invention, since there is no narrow water conveyance section, it is possible to employ an inexpensive recycled material that can ensure quality such as workability and water permeability.

  In the present invention, the waste melting furnace granulated slag whose particle size is adjusted by grinding and crushing treatment has good workability, and the rolling property is 20% or more by design CBR and may be about 15% or more. Watertight CBR may also be compared to sand.

  The water-retaining function of the waste melting furnace granulated slag used in the surface water conveyance section of the present invention has the effect of reducing the surface layer temperature after rainfall, and can be expected as a countermeasure for heat island.

  In the case of turf construction on the surface layer, the present invention improves the turf environment by improving drainage and leads to good results for turf cultivation. Furthermore, by applying the above-mentioned waste melting furnace granulated slag having a water retention function to the lower lawn, it becomes a grant with good drainage and water retention, and good lawn construction can be performed.

It is a longitudinal cross-sectional view of the drainage structure of this invention. It is a longitudinal cross-sectional view of the drainage structure of another Example of this invention. It is a longitudinal cross-sectional view of the conventional drainage structure (1). It is a longitudinal cross-sectional view of the conventional drainage structure (2). It is a longitudinal cross-sectional view of the conventional drainage structure (3).

  Embodiments of the present invention will be described with reference to the drawings.

The ground water drainage structure of the present invention shown in FIG. 1 has a circular cross section in which a soil layer 2 above a sand layer 1 is filled with a waste melting furnace granulated slag 3 generated in a waste melting furnace as a drainage material. A drainage vertical hole 4 is formed . The waste melting furnace granulated slag 3 filled in the drainage vertical hole 4 melts ordinary waste and industrial waste in a waste melting furnace at a high temperature of 1200 degrees or more, and rapidly breaks the generated melt with water. The waste melting furnace water granulated slag (hereinafter referred to as “waste melting furnace water granulated slag”) is used. What removed the metal component by magnetic separation from the waste melting furnace granulated slag can be used. In this embodiment, the drainage vertical hole 4 has a depth reaching the sand layer 1. A plurality of drainage vertical holes 4 are formed at intervals in the drainage improvement region. The capacity, depth, number, arrangement, etc. of the drainage vertical holes 4 are determined by the predicted amount of drainage and the formation.

  On the soil layer 2, a waste melting furnace granulated slag layer 5 is formed as a water conduction layer by rolling and compacting waste melting furnace granulated slag of a waste melting furnace as a surface lower layer of the surface layer portion. A ground soil layer 6 is formed on the waste melting furnace granulated slag layer 5.

The waste melting furnace granulated slag 3 filled in the drainage vertical hole 4 melts ordinary waste and industrial waste in a waste melting furnace at a high temperature of 1200 degrees or more, and rapidly breaks the generated melt with water. Can be obtained. Waste melting furnace granulated slag generated in a waste melting furnace is an inexpensive recycled material and is easily available. The waste melting furnace granulated slag layer 5 has good water conductivity, and the water in the waste melting furnace granulated slag layer 5 flows into the packed bed of the waste melting furnace granulated slag 3 in the vertical drain holes 4.

  The surface water (rain water) of the ground soil layer 6 is sucked into the water-permeable ground soil layer 6 and penetrates into the waste melting furnace granulated slag layer 5 on the lower surface layer. The infiltrated water flows in the waste melting furnace granulated slag layer toward the drainage vertical hole 4. The ground water that has flowed into the drainage vertical holes 4 accumulates in the waste melting furnace granulated slag layer 5 and permeates and drains into the surrounding soil layer 1 and sand layer 2.

The construction method of the ground water drainage structure of Example 1 will be described with reference to FIG.

(1) When constructing a water conveyance layer on the ground surface with waste melting furnace granulated slag, the entire ground or the surface layer portion in the drainage improvement area is dug up to a thickness of 100 mm.

(2) A circular or rectangular drainage vertical hole 4 is excavated by an excavator in an area where the surface layer portion is cut off. The diameter of the circular vertical drain hole 4 is φ500 to φ600 mm, and the depth is about 2 m. As for the number of the vertical drain holes 4, 150 are excavated at equal intervals in a ground area of about 9000 m ² .

(3) The waste melting furnace granulated slag 3 of the waste melting furnace is filled in the vertical drain holes 4. A water-tightening method is carried out in which water is poured from above the packed bed and tightened so as not to cause settlement of the filling surface portion after filling the waste melting furnace granulated slag 3. The filling of the waste melting furnace granulated slag 3 and the water tightening are repeated to adjust the level of the filling surface portion to the ground surface.

(4) In order to ensure the water conductivity at the ground surface layer portion, the waste melting furnace granulated slag is laid and rolled to form the water guiding layer of the waste melting furnace granulated slag layer 5. The laying thickness is 30 mm in consideration of workability.

(5) The ground soil 6 is laid on the waste melting furnace granulated slag layer 5. The thickness is 70 mm. The ground soil 6 may be laid back with the ground soil dug up or newly laid.

  The present embodiment is an example of a ground water drainage structure in which a vertical hole for drainage is provided without forming a water guiding layer under the turf ground.

  In the drainage structure shown in FIG. 2, rectangular drainage vertical holes 8 and circular drainage vertical holes 9 are formed under the turf ground 7. The ground water (rain water) flows from the turf ground 7 in the direction of the drainage vertical holes, and flows into the packed bed of the waste melting furnace granulated slag 3 to be drained. In this embodiment, the drainage capacity is improved by arranging rectangular drainage vertical holes 8 having a larger area and a larger volume of the filling surface portion of the waste melting furnace granulated slag 3. The interval and volume of drainage vertical holes are determined by the estimated amount of drainage and the formation.

The construction method of the ground water drainage structure of Example 3 will be described with reference to FIG.

(1) The turf ground 7 in the region where the vertical drain holes 8 and 9 are excavated in the drainage improvement region is peeled off.

(2) Excavate the required number of rectangular drainage vertical holes 8 and circular drainage vertical holes 9 with an excavator. In this embodiment, the rectangular drainage vertical hole 8 has a size of 1.5 m × 2 m and a depth of about 2 m, and the circular drainage vertical hole 9 has a diameter of 0.6 m and a depth of 1 to 2 m.

(3) Fill the drainage vertical holes 8 and 9 with waste melting furnace granulated slag. A water-tightening method is carried out in which water is poured from above the packed bed and tightened so as not to cause settlement of the filling surface portion after filling the waste melting furnace granulated slag 3. The filling of the waste melting furnace granulated slag 3 and the water tightening are repeated to adjust the level of the filling surface portion to the ground surface.

(4) After the filling of the waste melting furnace granulated slag 3 is finished, surface turfing is performed.

1: Sand layer 2: Soil layer 3: Waste melting furnace granulated slag 4: Circular drainage vertical hole 5: Waste melting furnace granulated slag layer 6: Ground soil layer 7: Turf ground 8: Rectangular drainage vertical hole 9 : Circular drainage hole 31: Crushed stone layer 32: Asphalt layer 33: Artificial lawn 34: Underdrain 35: Side groove 41: Ground soil 42: Main drainage groove 43: Branch drainage groove 44: Pumice 45: Main drainage pipe 46: Branch Drainage pipe 47: sand barrier net 48: sand 51: road bed 52: roadbed layer
53: Middle layer 54: Vertical hole
55: Drain core 56: Surface layer
57: culvert tube

Claims (6)

In groundwater drainage structures that drain groundwater from grounds of various facilities including schools, competition grounds or grounds in parks ,
Wastewater vertical hole filled with granulated slag of waste melting furnace obtained by melting the waste generated at a high temperature of 1200 ° C or more in a waste melting furnace and rapidly crushing the generated waste with water. ground water drainage structure, characterized in that formed in the ground. 2. The ground water drainage structure according to claim 1, wherein a water conduction layer is formed by a waste melting furnace granulated slag layer under the surface layer of the ground. The ground water drainage structure according to claim 1 or 2, wherein a turf surface is formed on a vertical drainage hole filled with waste melting furnace granulated slag . Drilling vertical holes for drainage in the grounds of various facilities including schools that drain groundwater, competition grounds or grounds in parks,
Waste melting furnace water granulation obtained by rapidly crushing the generated waste material with water by melting and processing general waste and industrial waste in a waste melting furnace at a high temperature of 1200 degrees or more in the excavated vertical drain hole A construction method for a ground water drainage structure, characterized in that a drainage vertical hole filled with waste melting furnace granulated slag is formed by filling slag, pouring water from the top of the packed bed, and water-tightening . Before excavating the drainage vertical hole, scrape the surface layer of the ground in the drainage area, excavate the drainage vertical hole, form the drainage vertical hole filled with the waste melting furnace granulated slag, and then form the waste melting furnace granulated slag layer 5. A ground water drainage construction method according to claim 4, wherein a ground surface layer is formed thereon . Before digging the drainage vertical hole, scrape the turf ground in the drainage area, excavate the drainage vertical hole, form the drainage vertical hole filled with waste melting furnace granulated slag, and then form the turf ground The construction method of the ground water drainage structure of Claim 4 .

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