JP4636290B2 - Lawn permeability recovery method - Google Patents

Description

  The present invention relates to a method for restoring the water permeability of laid lawns.

The laid lawn is rich in water permeability, and rainwater that has fallen quickly penetrates into the basement without accumulating on the surface, making the surface dry and presenting a vivid landscape of green.
Richly grown lawn is gentle on the eyes, but the surface has moderate cushioning, so it is important in golf sports facilities such as golf, soccer, baseball, etc. where the ball moves on the ground. It is one of the facility components. In particular, in golf competitions, since the movement process of the ball greatly affects the competition, much attention is paid to the management and maintenance of lawn conditions that are greatly influenced by the weather in outdoor competitions.

Therefore, in setting and maintaining the green, fairway, and rough lawn that make up the golf course, a gravel layer is placed under the lawn root in order to facilitate drainage of rainwater in order to facilitate drainage of rainwater. In addition, pipes for underground drainage facilities are laid in the basement. In some cases, the culvert drainage has been laid from the time the golf course was established, but in many cases it was often done as a post-construction after seeing the course conditions that changed over time after the start of use.
This culvert drainage laying work first excavates a groove of a predetermined depth on the ground exposed by peeling the lawn, laying the drain pipe of the culvert drainage equipment and a branch pipe connected to this at the bottom of the groove, It was a common method to re-lay the lawn after laying the ground and gravel layer on top of it, and then preparing the lawn for soil cultivation.

  However, such underdrainage works effectively when precipitation permeates quickly from the lawn to the underground layer, but due to various conditions such as changes in the environment of use for many years, for example, the lawn root layer It was not effective when the lawn root layer was clogged due to soil aging and precipitation with fine particles. If the water permeability of the lawn becomes poor in this way, it becomes difficult to eliminate water pools and infiltration on the lawn surface, which hinders the use of golf courses and stadiums. In addition, poor water drainage also caused lawn leaf wilt and root rot.

  As a solution to this problem, it is conceivable to replace the entire surface of the lawn, but this is not a preferable option because it is expensive and time is required for fixing the lawn. Then, the method of respond | corresponding by addition or the re-installation of the underdrain drainage disclosed to patent document 1, or the ground improvement method of the turf ground disclosed by patent document 2 is disclosed.

In this method of ground improvement, a plurality of vertical holes are formed at predetermined intervals in the turf, and a groove that is shallower and narrower than the vertical hole is formed between adjacent vertical holes so that the vertical holes communicate with each other. Furthermore, it is a method of filling the inside of the vertical hole and the groove with a ground improvement material having good drainage.
JP-A-8-81947 (page 3-5, FIG. 1) JP-A-6-10337 (page 2-4, Fig. 2)

  However, the methods disclosed in these documents for the purpose of restoring water permeability of lawn have the following problems.

  First, in the method of adding underdrainage facilities of Patent Document 1, a part of the lawn surface to be constructed is peeled off and a branch pipe or a drain pipe groove is excavated, and a branch pipe or a drain pipe is disposed in the groove. After that, the soil is laid down with soil mixed with gravel and fertilizer. Furthermore, it was necessary to go through a process such as turfing the surface of the groove. For this reason, although the construction period was shorter than the entire turf resurfacing, it was necessary to introduce excavating machinery such as small tractors and carry out excavated soil, which had to be a large-scale construction work. . Moreover, since it is the operation | work which puts heavy objects, such as excavation machinery, in a lawn surface, the lawn surface was roughened and there existed a subject that it took time also to return.

  Next, in the ground improvement method of turf ground in Patent Document 2, it is necessary to form a plurality of vertical holes and grooves that connect the vertical holes in the lawn, and to fill these with ground improvement material mixed with sand, fertilizer, or the like. It was. Since such work is at least two steps of forming vertical holes and grooves and filling with these ground improvement materials, the work steps are simplified compared to the method of Patent Document 1, but the range of the lawn to be targeted is When it is wide, it takes time and labor to excavate the lawn and to fill the ground improvement material. Therefore, a dedicated mechanical device is also disclosed. However, since the use of this mechanical device is due to mounting or towing on a tractor or truck, the lawn is roughed as in the technology disclosed in Patent Document 1, and the construction cost as a whole has not been reduced.

  Accordingly, the present invention has been made paying attention to the above-mentioned problems, and effectively restores the water permeability of the lawn with simple tools and construction methods without using mechanical devices that may damage the lawn. A new construction method is provided.

  In order to solve the above problems, the lawn permeability recovery method of the present invention employs the following configuration.

  That is, after forming a small hole group that penetrates grass roots at a plurality of locations on the lawn surface to be treated, high-pressure water is injected into the lower layer of the grass roots in the perforated region of the small hole group, and the injected water is It is characterized in that it leaks onto the lawn surface by spreading over the grass roots in the perforated area of the hole group. When the lawn surface to be treated by this construction method is wide, it is necessary to repeat the formation of small holes and the injection process of high-pressure water. The small hole group may be formed by manually penetrating a rod-like body or a root cutting blade into the lawn surface, and is formed using a lawn care drilling device commercially available for lawn aeration. May be.

  The injection of high-pressure water is performed by supplying water from a high-pressure water supply device arranged outside the area of the lawn surface to be treated (for example, a so-called cart road), and inserting the tip of a rod-shaped tube body having a nozzle at the tip into the lawn. It is characterized by penetrating the root and penetrating to the lower layer.

  The injected water spreads around the grass roots and erupts as muddy water from the small holes and the grass surface in the vicinity. The ejected muddy water is collected together with garbage, mud, etc. that stayed in the grass roots. This collection uses a suction device that can suck in earth and sand water, but this collection is not essential, and if it has an inclined surface like a golf course, it will not be collected without being collected. You may lead to.

  Next, the tip of the tube may be excavated by inserting it from the lower layer of the grass roots to the gravel layer in the vicinity of the drain pipe, which is a lower drainage drainage facility, and jetting high-pressure water. In other words, the insertion of the pipe body up to the gravel layer can be performed with a small insertion force of an operator because the injection of high-pressure water from the nozzle excavates the soil layer in the middle. The jetted high-pressure water also forms a flow path (drainage channel) to the drain pipe in the soil or gravel layer below the grass roots.

  The nozzle at the tip of the tube body is characterized by being gradually flattened having a slit-like jet at the tip. By adopting this flat nozzle shape, the grass roots can be inserted in a small range, and the lawn surface can be quickly restored after the nozzle is pulled out. In addition, this nozzle may be detachable from the tube, and may be replaced with a nozzle having specifications as appropriate according to the lawn condition.

  In addition, the nozzle outlet is in the tube axis direction and an acute angle direction. This makes it easy and efficient to excavate the formation with high pressure water.

  The lawn water permeability recovery method of the present invention configured as described above has the following effects.

  In carrying out this construction method, it is possible to minimize the loss of the lawn surface due to the entry of heavy objects, which is the biggest problem of the conventional method described above, and it is a simple work process, so it is performed simply by human power. be able to. For this reason, in a wide range of golf courses, it is possible to perform a quick process with a shortened construction period, so that it is cost effective.

  In addition, the flat nozzle can cut the root of the smallest part and allow it to enter the lawn, and after the treatment, the open mouth is elastically narrowed so that the cut is not noticeable on the lawn surface. Have This shortens the period from construction to the start of use of the stadium and the like, which is important from a business point of view.

  The best embodiment of the lawn permeability recovery method (hereinafter referred to as “main method”) according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially cutaway perspective view showing an outline of the present construction method, FIG. 2 is a perspective view (A) and (B) showing the appearance of a tube nozzle, and FIG. 3 shows the action of the tube nozzle. It is sectional drawing (A) which shows (B).

  The present construction method can be applied to any place as long as it is a lawn surface. However, as an explanation of the best mode of the present invention, a case where it is applied to a lawn surface of a golf course will be described below as an example. .

  In addition, in the following, the case where there is a culvert drainage facility in the green underground layer is explained, but there is no relation between the presence of this culvert drainage facility and the implementation requirements of the present invention, and there is no culvert drainage facility. Confirm in advance that it is sufficiently applicable to the lawn surface.

  In a general green floor structure, a soil layer 33 in which earth and sand, fertilizer, etc. are mixed below the lawn root 32 of the lawn 3, and a culvert drainage facility 4 is installed below that with a coarse sand or gravel gravel layer 34. . The underdrainage facility 4 is composed of a drain pipe 41 having a large number of holes on its side surface and a plurality of branch pipes 42 connected to the drain pipe 41 in a branch shape. The downstream side of the drain pipe 41 is connected to a drainage treatment facility attached to the green, for example, a drainage basin 5 communicating with the drainage main pipe 51. The lawn 3 is not intended to be limited to the green structure described above, and can be applied to any lawn such as a soccer field, an athletic field, a baseball field, or a park.

  First, in the lawn 3, a small hole group composed of a large number of small holes 31 is formed on a lawn surface in a predetermined area where water permeability is restored. The small hole 31 is formed to a depth that penetrates at least the grass root 32. By forming the small hole group, so-called “root cutting” or “aeration” is performed on the grass root 32 in the grass 3. The small holes 31 are usually formed manually by the operator H by sticking a sharp-edged rod or hollow root cutting blade (tine) into the lawn surface. You may make it form using the stepping-type drilling instrument currently used.

  Next, the tube 1 is pierced from the vertical direction to the extent that the worker H penetrates the grass root 32 and the tip side reaches the soil layer 33 with respect to the grass 3 in the drilling area of the small hole group, and this state is maintained. While holding the tube 1.

  The pierced tube body 1 has a nozzle 12 connected to the lower end side through a joint portion 11. The nozzle 12 is formed in a gradually flat shape toward the tip, and the injection port 12a is processed into a slit shape or a long hole shape. Further, a notch 12b is formed in the injection port 12a in order to obtain a side injection axis from the tube axis. As shown in FIG. 2, the notch 12b may be oriented in either the long side or the short side of the slit-shaped injection port 12a.

  As a result, as shown in FIGS. 2 and 3, when the high-pressure water is injected, the nozzle 12 is injected not only in the tube axis direction but also on the side forming an acute angle. As a result, the high-pressure water can be spread widely in the lower layer of the grass root 32.

  The upper side of the pierced tube 1 is formed with a hand-held portion 13 so that the worker H can easily hold and pierce the tube 1 and is connected to the hose 14 from the high-pressure water supply device 2. . The high-pressure water supply device 2 moves a so-called cart road 35 by loading necessary treated water in a tank 21 and loading it on a light truck 22 or a carriage.

Next, the high-pressure water sprayed from the spray port 12a of the nozzle 12 of the tube 1 having the above structure is injected into the lower soil layer 33 partially including the grass roots 32, and reaches the perforated region of the small hole group. Become. Since the small holes 31 are connected to the atmosphere, the injected high-pressure water forms a flow path and leaks onto the lawn surface. At this time, since there is a momentum in the flow, the surrounding earth and sand is involved in addition to the flow path, and is ejected from the small hole. As a result, the lump soil and clay soil that have been solidified around the roots are destroyed, the roots are washed to restore water permeability, and the roots are energized.
In this embodiment, high-pressure water having a water pressure in the range of 0.5 to 1.5 MPa (5 to 15 kgf / cm ² ) is used.

Since the leaked water has a certain degree of inclination in a golf course, it flows as it is and is collected in the nearby drainage basin 5. In addition, the application of the present invention is not limited to golf courses, but even when it is a flat surface, the turbidity of muddy water decreases due to water treatment and water, and it passes through the grass roots 32 and penetrates into the lower layer. There is also.
However, it is more preferable to recover the leaked water. For this collection, for example, an existing collection device using vacuum means may be used.
[Other Embodiments]

  In the construction method described above, the worker H injects high-pressure water while maintaining the position of the nozzle 12 of the tubular body 1 pierced into the soil layer 33 below the lawn root 32. Excavation with this high-pressure water is performed. You may make it penetrate deeply (for example, 1-2 m). At this time, when the underground drainage facility 4 is laid underground, a more effective drainage channel can be formed by excavating the vicinity.

It is a partially cutaway perspective view showing an outline of this construction method. It is a perspective view (A) and (B) which show the appearance of the nozzle of a tube. It is sectional drawing (A) and (B) which show the effect | action of the nozzle of a tubular body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tubing body 11 Joint part 12 Nozzle 12a Injection port 12b Notch 13 Hand-held part 14 Hose 2 High-pressure water supply apparatus 21 Tank 22 Light truck 3 Lawn (green)
31 Small hole 32 Lawn root 33 Soil layer 34 Gravel layer 35 Cart road 4 Underdrain drainage equipment 41 Drain pipe 42 Branch pipe 5 Drainage pipe 51 Drain main H Worker

Claims (3)

After forming a small hole group that penetrates grass roots in multiple locations on the lawn surface to be treated,
For the lower layer of grass roots of perforated area of the small hole group, injected with high pressure water by the insertion of a rod-shaped tubular body forming the nozzle tip,
A water permeability recovery method for lawn, wherein the injected water is leaked from the small hole group onto the lawn surface.   2. The lawn permeability recovery method according to claim 1, wherein the tip nozzle of the tubular body is formed in a gradually flat shape.   3. The lawn water permeability recovery method according to claim 1, wherein the spray direction from the tip nozzle of the tube body is a tube axis direction and an acute angle direction thereof.

Images