JPH0559205B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a sports field that can be used for competitions, etc. immediately after rainfall, irrigation, and watering, and can also be planted with turfgrass and the turfgrass can withstand severe treading pressure. This relates to the construction method, and sports fields are used for, for example, golf courses, rugby fields, baseball, soccer, lawn tennis, etc., as well as school playgrounds, schoolyards, park plazas, lawns, walkways, etc.

(Conventional technology and its problems) In the natural soil of conventional sports grounds, rainfall,
Immediately after watering, sports events may be canceled or results may not be as good as they should be due to mud, puddles, and slips. On the other hand, with artificial surfaces, abnormal impacts on human joints and slip-over heat accidents are common. Natural grass grounds are designed to avoid this problem, but although the above-mentioned problems can be eliminated, it is difficult to maintain and manage the grass that forms the surface. What these areas have in common is that excessive water is retained underground, and the non-capillary pores that serve as passages for gravity water disappear due to the treading pressure caused by play, leaving the roots of the turf grass in an oxygen-deficient state and quickly becoming bare ground. The excess water associated with these needs to be removed as soon as possible, and there are no adequate solutions.

(Means and effects for solving the problems of the invention) As a result of various research and trial production, the present invention covers the soil base with a waterproof synthetic covering as an underground structure, prevents water from flowing into the base soil, and provides ventilation in the upper part. By arranging a multi-purpose perforated pipe as a dual-drainage pipe, and using porous natural pumice grains or artificial porous aggregate as a permeation drainage layer on top of the pipe,
An underground environment with ventilation, drainage, and water retention capacity can be provided, and if turf grass is planted, strong turf grass will grow, providing a natural grass sports field that can withstand tread pressure.

In particular, in the present invention, by using pumice with a diameter of 20 to 40 mm or an artificial porous aggregate with the same particle size, water is retained in the narrow pores of the pumice or porous aggregate, and the water rises due to capillary action. , excessive drying or wetting of moisture in the soil is avoided, which helps plant growth.

(Example) The details of the present invention will be explained below with reference to the drawings. FIG. 1 is a sectional view of a golf green according to the present invention. The digging depth will vary depending on the height of the finished surface, but after determining the base layer 1, dig trenches at intervals of, for example, 4 m.
Ventilation and drainage pipe groove 2. A synthetic chemical product sheet with a thickness of 0.5 to 1.5 mm is closely laid on the bottom of the base layer 1 and the ventilation and drain grooves 2 to form a waterproof mat 3. A multi-purpose perforated pipe 4 with a diameter of 60 to 100 mm is inserted into the ventilation and drainage pipe groove 2. The C layer 5 above is filled with pumice stone with a diameter of 20 to 40 mm or artificial porous aggregate with a thickness of 20 to 30 cm to form a rapid drainage layer. A net or fibrous mat is laid on top of it to form a barrier layer 6 to prevent small particles from flowing into the C layer 5. On top of this, pumice sand or artificial porous aggregate with a diameter of 2 to 5 mm is poured to a thickness of 20 to 25 cm to form layer A 7.
The water permeability rate of this layer A 7 is preferably 1000 mm/hour or more, forming a mist-like air system rich in air layers.

In order to create a sports field with turf plants, organic matter from plants and animals and fertilizers are added to the surface layer of layer A 7, and the field is tilled to a depth of about 10 cm to create a surface layer. The surface layer of layer A 7 forms the initial culture bed for turfgrass, and the standard water permeation rate is 500 to 1000 mm/hour.
Since a top soil layer 8 of 2 to 5 cm is formed by applying soil several times before the turfgrass is planted and the surface of the golf green is finished, the batting quality is maintained and the stability of the surface is maintained. The water permeability of this top soil layer 8 is preferably 300 mm/hour or more,
Continue mechanical renewal to avoid thickening over time.

By constructing these top soil layers 8 to C layers 5 in accordance with the above-mentioned specifications, the gaps between particles contribute to the downward movement of gravity water, and water does not stagnate underground. On the other hand, due to the pores of pumice or artificial porous aggregate, it can be used to retain water and fertilizer and grow turfgrass.

(Effects of the invention) Since the pores of the particles themselves in the underground structure of the sports field use porous aggregate, firstly, there is no limit to the use of the field or surf field due to excess moisture, and the field is always in good condition. It became possible to play. Second, underground compaction and oxygen deficiency caused by excess moisture were avoided, the growth of turfgrass was promoted, and a golf green with consistently good putting quality was formed.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a sports field development site according to an embodiment of the present invention. 1... Base layer, 2... Ventilation drain, 3... Waterproof mat, 4... Multi-purpose perforated pipe, 5... C layer, 6...
...Lower layer, 7...A layer, 8...Top soil layer, 9
...turfgrass.

Claims (1)

[Claims] 1. Make the underground foundation capable of drainage, dig ventilation and drainage pipe grooves at intervals, lay waterproof pine tightly on the foundation and the ventilation and drainage pipe grooves, and install multi-purpose perforated pipes in the ventilation and drainage pipe grooves. . Furthermore, the C layer is composed of pumice with a diameter of 20 to 40 mm or artificial porous aggregate with the same particle size.
A method for constructing a sports field characterized by laying a net or fibrous mat on top of the field and cultivating turf using the surface layer as a turf culture soil layer.