JPH0149850B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for draining surface vegetation such as lawns on golf courses and the like through culverts.

Sprinkled water flows over the ground surface on slopes, and the drying rate of water is uneven between high and low places, which has the disadvantage that the grass does not grow uniformly.

The present invention has been developed in view of the above-mentioned drawbacks, and its purpose is to uniformly manage drainage and water retention between high and low places, especially on sloped areas, by a simple construction method, and thereby to improve water retention on the ground surface. To provide a method for creating a vegetated surface such as a lawn, which allows suitable growth of plants such as a vegetated lawn.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3, using a case where a golf course is constructed as an embodiment.

In the first step, the sloping ground surface H is excavated to a predetermined depth D to form a base surface B whose longitudinal section is substantially parallel to the ground surface H.

The depth D is preferably about 50 cm below the ground surface H, that is, the green surface. Excavation will be carried out using bulldozers, lift trucks, etc., and the excavated soil will be transported to the designated area by vehicle. Foundation B will be leveled using a bulldozer, etc.

In the second step, partition plates 1 are erected in steps along a plurality of contour lines on the surface B of the substrate formed in the previous step.

The partition plate 1 is a board with a width of about 40 cm or less and a length of about 50 m, cut into a length suitable for the site, and erected vertically in the width direction.

In the third step, a water-impermeable sheet 2 is laid over the entire surface of the base B on which the partition plates 1 were erected in a stepped manner in the previous step. The material used for the sheet 2 is polyethylene, vinyl, or the like.

In the fourth step, the sheet 2 is placed on the surface of each sheet 2 in the portion that intersects the upstream-facing lower end of each partition plate 1 and the base B surface on which the sheet 2 was laid in the previous step, that is, the partition plate 1
A water collection pipe 3 with small holes is arranged at a fixed position on the sloped part divided by , and one end 3a thereof faces a pit 4 for water collection and water level adjustment. This pit 4 is constructed of concrete. 5 is a vertical pipe arranged vertically within this pit 4, and this vertical pipe 5 is connected to the water collecting pipe 3.
It is connected to the. Further, in order to adjust the underground water level, this vertical pipe 5 is provided with a plurality of holes (not shown) above and below that can be opened and closed freely.

In the fifth step, a nonwoven fabric 7 having an end surface 6 parallel to the ground surface H in a direction orthogonal to the plurality of partition plates 1
A large number of them will be erected.

In the sixth step, sand 8 of a predetermined grain size is poured onto the base B surface on which the sheet 2 was laid in the previous step and on which the water collection pipe 3 was arranged.

The soil is removed to a depth approximately equal to the depth excavated in the first step.

In the seventh step, topsoil 9 for vegetation is layered on the top surface of the sand 8 that was added in the previous step so as to be substantially aligned with the original ground surface H.

One embodiment of the present invention has the above-mentioned configuration, and since the end surface of the nonwoven fabric 7 is parallel to the ground surface, the moisture that rises due to the capillary phenomenon of the nonwoven fabric 7 is uniformly permeated regardless of whether it is a highland or a lowland. Demonstrates water retention properties. Further, the amount of water retained can be increased or decreased by changing the length of the fibers of the nonwoven fabric 7.

Also, near the lower end of the partition plate 1, that is, the partition plate 1,
Since a water collection pipe 3 with pores is provided at the lowest position divided by 1, sand 8 of a predetermined particle size is layered on the base B via an impermeable sheet 2, and this sand 8
Excess moisture in the topsoil for vegetation 9 on the upper surface of the tank is collected by a water collection pipe 3 and drained from a pit 4 for water collection and water level adjustment. Further, the amount of drainage is controlled by the pit 4. For this reason, root rot and pest damage to the grass grown in the added soil will not occur.

As described above, the present invention involves erecting a plurality of partition plates along a plurality of contour lines on a base excavated parallel to an inclined ground surface, and erecting a large number of nonwoven fabrics perpendicular to the partition plates. This system is buried in the soil, and a perforated water collection pipe is installed near the bottom of the partition plate, ensuring uniform drainage and water retention of the soil between high and low areas on a slope. Can be managed. For this reason, the growth of plants such as lawns on the ground surface can be carried out suitably,
It is also easy to construct, and construction and material costs are low.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a longitudinal sectional view, and FIG. 3 is a longitudinal sectional view taken along a water collection pipe. 1... Partition plate, 2... Sheet, 3... Water collection pipe,
4... Pit, 5... Vertical pipe, 6... End face, 7...
...Nonwoven fabric, 8...Sand, 9...Top soil for vegetation, B...
Base, H...ground surface.

Claims (1)

[Claims] 1. An impermeable sheet is laid on a foundation excavated parallel to the sloping ground surface, and partition plates are erected along multiple contour lines, with one end near the bottom of the partition plate serving as a water collection pit. A series of perforated water collection pipes are arranged, and a large number of nonwoven fabrics with end faces parallel to the ground surface are erected in a direction perpendicular to the partition plate, and these are buried in a specified area of sand, top soil, etc. A method for draining surface vegetation such as lawns through an underdrain.