JPH02303418A - Promotion of growth of plant or the like and prevention of destruction of pavement - Google Patents

Abstract

PURPOSE:To promote growth of roadside trees, etc., and to prevent destruction of sidewalks by laying an air supply pipe having both ends opening to the atmosphere, having air permeability, under ground in the vicinity of transplanted tree, etc., and forming a soil zone rich in oxygen in the periphery of root part of tree. CONSTITUTION:An air supply pipe 15 having at least one end opening to the atmosphere and air permeability is laid under ground in the vicinity of transplanted tree and a soil zone 16 rich in oxygen is formed in the periphery of root part of the tree to promote growth of tree, etc. Consequently, roots of tree will not rise to the ground and extend deeply in the earth and prevent destruction of pavement. The tree is roadside tree, etc., is preferably planted in a tree planting zone adjoining roadway or sidewalk, the air supply pipe is approximately in a U shape and laid under ground while opening both the ends of the pipe to the atmosphere.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for promoting the growth of trees, particularly roadside trees, and a method for preventing pavement destruction by preventing the destruction of sidewalks and the like by these trees.

<Prior Art> For example, as shown in FIG. 8, a tree 1 such as a street tree is grown between a roadway 2 and a sidewalk 3. A place where there is not enough space between the roadway 2 and the sidewalk 3,
For example, in downtown areas, as shown in the figure, pot-sized tree planting bases are set up in the ~ part of the sidewalk 3 to plant trees, and in areas with a little more space such as in the suburbs, the driveway 2 and the sidewalk 3 are planted. A separate belt-shaped tree-planting zone is established between the trees, and trees are often planted in this tree-planting zone.

<Problems to be Solved by the Invention> However, in any case, when it comes to trees I such as street trees under the above-mentioned conditions, not only when constructing the roadway 2 but also when constructing the sidewalk 3. However, it must be said that the growing conditions are extremely poor because the surrounding ground is hardened.

Therefore, the root Ia of tree 1 under these conditions is:
(1) In addition to not being able to expect sufficient growth, (2) Rather than growing deep underground, for example, as shown in the figure, they surface under the asphalt pavement of the sidewalk 3, causing cracks in the sidewalk 3 as the roots 1a enlarge. If this occurs or the enlargement progresses further,
The roots 1a themselves come to protrude above the sidewalk 3.

According to research conducted by the present inventors, the amount of oxygen in soil tends to decrease due to the activities of bacteria and various fungi, and it has been recognized that in bare soil, the amount of oxygen decreases as the depth increases. For example, from spring to summer, 21% of the ground surface
Even in places where the amount of oxygen is around 30 cm underground, the amount of oxygen drops to around 18%.

On the other hand, in areas such as the asphalt binding of sidewalk 3 mentioned above, the paving composite materials are exposed to direct sunlight and reach a considerable high temperature during the day, so bacterial activity is extremely active, and according to the inventor's measurement data, It has been observed that the amount of oxygen in pavement soil decreases to about 1% in summer.

Naturally, this oxygen-deficient underground environment is bad for tree root growth, and the growing roots will forcefully rise to the surface beneath the asphalt pavement. This is because asphalt pavement has some degree of air permeability and water permeability, so some oxygen and moisture are supplied from the outside, and water droplets due to condensation due to temperature differences between day and night can also occur. This is because relatively good vegetation conditions can be obtained directly under the pavement. As the roots grow in search of areas with favorable vegetation conditions, sidewalk destruction and the $1 root phenomenon occur as described above.When such sidewalk destruction and floating root phenomena occur, it is necessary to repair or renovate the sidewalk 3 itself. It goes without saying that construction work is absolutely necessary, but until then, an extremely dangerous situation will occur for pedestrians, cyclists, etc.

In fact, in new towns near urban areas, accidents have been reported in which elderly pedestrians fall due to their feet being caught by cracks 4 lifted up by roots 1a or by roots 1a themselves.

In addition, in the case of roadside trees under adverse conditions such as those mentioned above,
Roots 1a grow extremely poorly and cannot be expected to perform their original functions, so when a large amount of water evaporates from branches and leaves under the scorching sun in summer, water cannot be refilled from roots 1a in time, causing damage to the tree 1 itself. Summer blight phenomenon may occur. For this reason, even roadside trees that have grown to great length are usually trimmed down on a regular basis. In other words, with conventional roadside trees, etc., the effort of felling them is always required, and large growth of the trees 1 cannot be expected.

The present invention has been made in view of such conventional circumstances.

<Means for Solving the Problems> The present invention is characterized by burying air supply pipes near trees and actively creating an oxygen-enriched soil zone with a high oxygen content underground. While trying to grow trees in a healthy manner, if there is a pavement near the tree, the formation of this oxygen-rich soil zone will push the roots out of the way and prevent the pavement from being destroyed.

To explain this more specifically, one of the present inventions is to bury a breathable air supply pipe with at least one end open to the atmosphere in the ground near where a tree or the like is planted, and It is a method of promoting the growth of trees, etc. that forms an oxygen-rich soil zone around the area.

Another aspect of the present invention is to bury an air permeable air supply pipe with at least one end open to the atmosphere in the ground near where trees or the like are planted and where there is a paved surface, and to This is a pavement destruction prevention method that prevents pavement destruction by forming an oxygen-rich soil zone around the roots and suppressing the floating of the roots.

<Effect> Due to the formation of this oxygen-rich soil zone,
The roots of trees, etc. will now extend deep into the earth, and sufficient growth can be expected.

Furthermore, such natural growth suppresses the floating root phenomenon, so even if there is a paved surface such as a sidewalk near a tree, the destruction of the paved surface is effectively prevented.

<Example> Figures 1 to 4 show an example of the method for promoting the growth of trees and the method for preventing pavement destruction according to the present invention.

In the figure, 11 is a tree as a street tree, and in this example, it is planted in a tree-planting zone 14 formed between a roadway 12 and a sidewalk 13. A roughly U-shaped air supply pipe 5 is buried in the ground from near the root 11a of the tree 11 to the other end on the opposite side of the sidewalk 13.

The air supply pipe 15 is made of a porous pipe or a perforated pipe having air permeability, and when it is buried, at least one of the pipes is opened to the atmosphere on the ground. From the viewpoint of air circulation, both ends are opened, and on the other hand, as in this example, the protruding part on the tree 11 side is made high, and the opening on the opposite side, on the side of the sidewalk 13, is made low, so that it is roughly connected to the paved surface, etc. It's the same day. This difference in height between the openings allows for active air circulation, as will be described later. Note that the rising portion on the side opposite to the tree 11 side is not limited to the sidewalk 13 portion, and may be opened to the side portion of the sidewalk 13 as shown by the broken line in FIG.

In any case, atmospheric air is supplied to the vicinity of the underground pipe 15 through the pipe 15 by the air supply pipe I5. As a result, as shown in FIG.
An oxygen-enriched soil zone 16 with a relatively high oxygen content is formed from part a to the part below the sidewalk 13.

Due to the formation of this oxygen-rich soil zone 16, the roots 11 of the trees 11
Unlike conventional plants, a grows over a wide area and extends considerably deep into the ground, allowing sufficient growth and providing sufficient water replenishment functions.

In other words, this provides an excellent method for promoting the growth of trees and the like.

On the other hand, this fundamental growth form eliminates the floating root phenomenon, and from the perspective of the pavement surface such as a sidewalk, a construction method that prevents pavement destruction can be obtained.

For example, when a perforated pipe 17 made of vinyl chloride or the like is used as the air supply pipe 15 as shown in FIG.
(Vertical attachment is also possible), it is preferable to prevent clogging of the hole 17a during construction.

In addition, when burying this sheet-wrapped perforated pipe 17, in order to obtain a sufficient function of supplying air to a wide range of underground areas, it is necessary to install a comparative method around the perforated pipe 17, for example, as shown in FIG. It is preferable to provide gravel 1i19 or the like that forms a large space (gap). As this gravel layer material, in addition to so-called gravel, gravel, crushed stone, plant pieces, etc. can be used.

As a buried form of the air supply pipe 15, for example, the third
As shown in the figure, it is preferable to bury two of them by hand near the left and right sides of the tree 11. Then, it is preferable to attach a camp 20 having a breathable slit hole 21 or the like to the opening 15a.

Note that the manner in which the air supply pipe 15 is buried is not limited to the case shown in FIG. 3, and various manners may be considered, for example, as shown in FIGS. 5 to 7. In that case, the opening 15a of the air supply pipe 15 is provided at an appropriate location,
It is advisable to attach the camp 20 as described above.

Furthermore, although the above embodiment deals with the tree 11 planted in the tree planting zone 14, the present invention naturally
Not limited to this, when planted on a part of a sidewalk, it is not only related to this sidewalk, but also actively guides the roots under the roadway, or on a sidewalk on an embankment slope, a simple driveway, etc., or on concrete pavement. Of course, it can also be applied to plazas constructed of bricks, tiles, stone slabs, etc., parking lots, and even tree-planting spaces on structures such as building rooftops.

<Effects of the Invention> As is clear from the above explanation, according to the method for promoting the growth of trees and the like and the method for preventing pavement destruction according to the present invention, the following excellent effects can be obtained.

(1) First, the air supply pipes supply a suitable amount of air from the atmosphere to the ground, so even in areas with extremely poor vegetation conditions, such as sidewalks and tree-planted areas on the sidewalk layer, trees, etc., do not lose their roots. It can be grown deep underground.

In other words, the formation of an oxygen-rich soil zone allows the roots of trees, etc., to grow in their original ideal form.

Therefore, extremely good growth promotion is achieved.

Furthermore, in addition to the above-mentioned oxygen supply function, this air supply pipe can also be expected to have a hydration replenishment function, since moisture may be generated on the inner wall of the pipe due to the influence of temperature differences between day and night. especially,
If one end of the opening is set at the same height as the pavement surface and the air supply pipe is configured to double as a rainwater drainage/infiltration pipe, etc., it is possible to directly replenish moisture.

(2) As a result of the originally ideal growth as described above, destruction of sidewalks due to roots, which has been considered a problem in the past, can be effectively prevented. In other words, even if a paved surface such as a sidewalk is in the vicinity of planted trees, the above-mentioned formation of the oxygen-enriched soil zone suppresses the floating root phenomenon, so that destruction of the pavement can be effectively prevented.

Therefore, the danger to pedestrians and cyclists is significantly reduced, and the burden on road management, including road repair and renovation work, is also significantly reduced.

(3) In addition, as a result of the originally ideal growth described above, the hydration function of the roots is sufficiently strengthened, so that excess moisture from the mold surface in the summer, which has been a problem in the past, can be prevented. It is possible to prevent the summer blight phenomenon caused by the evaporation of water.

Therefore, it is not necessary to frequently cut down the branches and leaves of the tree as in the past, and the tree itself can grow to a large extent, and the effort required for felling management etc. can be significantly reduced.

(4) In addition, if there is a difference in height between the openings when the air supply pipe is buried, due to the influence of temperature differences between the atmosphere and the ground during the day and night, A phenomenon of air diffusion occurs due to the difference between the medium temperature and the atmospheric temperature (the specific weight of air varies depending on the temperature), and the higher the pipe exits above the ground, the greater the ventilation, creating a chimney effect. Since air supply is performed together with negative pressure, the advantage is that extremely smooth ventilation is possible.

(5) Furthermore, when burying the air supply pipe, if a layer of gravel or the like is provided around it, air can be supplied extremely smoothly into a wide area of the ground around the pipe. In other words, the air supply function is enhanced.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing the entire method for promoting the growth of trees, etc. according to the present invention, Fig. 2 is a sectional view showing a specific buried state of the air supply pipe, and Fig. 3 is a specific illustration of the air supply pipe. FIG. 4 is a vertical cross-sectional view showing the gravel layer around the air supply pipe, FIGS. 5 to 7 are plan views showing other ways of burying the air supply pipe, and FIG. The figure is an explanatory diagram showing the growing state of a conventional general roadside tree. In the figure, 11... Tree, 11a... Root, 12... Roadway, 13... Sidewalk, 14... Tree planting zone, 15... Air supply pipe, 15a... Opening, 16...Oxygen-enriched soil zone, 17...Perforated pipe, 19...Gravel layer, 20...Ki + Nobu, Patent applicant Kei Amano Toshite ktE Souichi Official document (spontaneous) September 25, 1999 1999 Patent Application No. 125520 2, Title of invention Method for promoting the growth of trees, etc. and method for preventing pavement destruction 3, Relationship with the case of the person making the amendment Address of the patent applicant 1-7-7-309 Shimotakaido, Suginami-ku, Tokyo Name Kagetoshi Amano 4, Agent ff41 ff03 (440)-
6761 Address: 5-23-1 G, Higashigotanda, Parts Ward, Tokyo, 411 In the subject specification, Detailed Description of the Invention column 7, Contents of the amendment as shown in Attachment 1, In the Specification, Page 12, No. 16 In line 1, ``Due to the influence, from the higher opening,'' is corrected to ``Due to the influence, especially at night time when the pavement surface is cooled, from the higher opening.'' 2. In the specification, on page 13, line 2, after "...advantages can be obtained." r If the paved surface becomes hot during the day due to sunlight, the pipes buried in the paved surface will be Warmed air is diffused to the ground surface, and air is supplied from the air supply pipe at the other end, which also ensures smooth ventilation. ” Insert the text. that's all

Claims (6)

[Claims] (1) A ventilated air supply pipe with at least one end open to the atmosphere is buried underground near where trees are planted to form an oxygen-enriched soil zone around the roots of the tree. A method to promote the growth of trees, etc. (2) The method for promoting the growth of trees, etc. according to claim 1, wherein the trees are roadside trees or the like and are planted in a tree-planting zone adjacent to a roadway or a sidewalk. (3) The method for promoting the growth of trees, etc. according to claim 1 or 2, wherein the air supply pipe is approximately U-shaped and is buried underground with both ends thereof open to the atmosphere. (4) The method for promoting the growth of trees, etc. according to claim 3, characterized in that when both ends of the air supply pipe are opened, the rising height of one is made higher than that of the other. (5) Claims 1 and 2, characterized in that the air supply pipe is made of a porous pipe, and when buried underground, its outer periphery is covered with a breathable sheet, and a gravel layer is provided around the air supply pipe. The method for promoting the growth of trees, etc. described in Section 3 or 4. (6) Bury a breathable air supply pipe with at least one end open to the atmosphere in the ground near where trees, etc. are planted and on a paved surface, and create an oxygen-enriched soil zone around the roots of the tree. A pavement destruction prevention method that prevents pavement destruction by forming and suppressing the lifting of the roots.