JP3413365B2 - Earth retaining method using bamboo vegetation - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for the surrounding environment and is easy and economical to construct, and prevents the collapse of slopes in forests and land development, restores slopes destroyed by disasters, and protects rivers and ponds. The present invention relates to a soil retaining method that is suitable for repairs and the like and can also promote greening at the same time.

[0002]

2. Description of the Related Art As a method for preventing the collapse of slopes in forests and built-up areas, restoring slopes destroyed by disasters (natural disasters, man-made disasters), and retaining soil for revetment of rivers and ponds, etc. Methods such as concrete spraying, concrete block or cast-in-place retaining wall construction, seed spraying, and lawn sticking are common.

[0003]

However, an artificial structure made by spraying concrete or by using a block or cast in place often causes a large discomfort with the surrounding environment, and incurs a great amount of work cost. In addition, the method of spraying seeds or pasting grass is good for the surrounding environment because it is green, and the construction cost is low, but when the roots of grass and grass are shallow, it does not function sufficiently as a soil retaining There are many.

As described above, in the conventional method, if the earth retaining function is prioritized, the artificial structure is mainly used, and a great amount of construction cost is required, and the sense of discomfort with the surrounding environment becomes large. All of them had a single function, such as a loss of function, and it was difficult to achieve both earth retaining function and familiarity with the surrounding environment.

Therefore, prevention of collapse of slopes of forests and land development,
The challenge is to be able to perform strong earth retaining for restoration of slopes destroyed by disasters, revetment of rivers and ponds, etc., as well as being familiar with the surrounding environment and being easy to construct and inexpensive. is there.

[0006]

[MEANS FOR SOLVING THE PROBLEMS] According to the present invention, bamboo of bamboo type represented by Hourai bamboo roots and germinates from the node when buried in the soil, and the root does not spread laterally. We focused on the fact that it has the property of growing strongly and long downward, and created a soil retaining method using the vegetation of a specific type of bamboo having such properties. That is, using a bamboo material obtained by cutting the stem portion of a specific type of bamboo having such properties into a length that includes multiple nodes, with the bamboo material oriented horizontally, at least a part of each node touches the soil. Embed by covering.
For bamboo materials, if the construction is done in a timely manner, cut it out from 2 to 3
It is preferable to use bamboo within a day (up to 5 days is possible). By doing so, a strong soil retaining effect can be obtained by roots that start from the node of the bamboo material that is in contact with the soil and extend strongly downward. Therefore, it is possible to strongly prevent soil from collapsing slopes in forests and built-up areas, restore slopes that have collapsed due to disasters, revetment of rivers and ponds, etc., and also grow bamboo. It promotes greening and is easy to adapt to the surrounding environment. Moreover, the construction is easy and the construction cost can be reduced. And since the root grows strongly downward, it does not cause bamboo shoots to appear disorderly around the root, and it is possible to use planned roots limited to earth retaining.

[0007] Bamboo materials are taken when the rooted bamboo is brought to the site and constructed while being cut to a predetermined length on site, or when the leaves are cut off or have leaves attached or the leaves are removed. There is a case where it is carried in to the site and subjected to the on-site chopping process, and there is a case where it is carried on to the site where the pre-engraved material is done, and in both cases, it is important to delay the moisture release as much as possible. Generally, the construction period is preferably from December to June. The maximum number of days from the digging or cutting of bamboo, which is the material, to the construction depends on whether the storage condition is good or bad depending on the season and on-site correspondence, but the storage condition is bad at the proper time (a measure that blocks the sun's rays). ), It is generally within 10 days after excavation in case of rooted delivery, and within 3 to 4 days after cutting in other cases, so it is the maximum period until rooting. The number of days. However, in order to increase the survival rate, it is better to keep the number of days until construction within half of the above period. Therefore, it is generally preferable to construct within 2 to 3 days after cutting as described above. It will be possible until 5th. It should be noted that, in the storage condition that blocks the sun's rays in midsummer, it takes 3 to 4 when rooted.
Day, otherwise 1 day. However,
The number of days until the material withers and the possibility of rooting disappears depending on the state of the material such as the state of rooting, the state of being cut off, the state of removing leaves, or the state of being cut at a predetermined length, and the material Depending on the storage conditions (temperature, humidity, sunlight, etc.), the point is to delay the moisture divergence of the material body to extend the number of days until construction. For example, if the material is soaked in water, it can be stored for a long period of 1 month or 2 months. For example, by using an aptitude material in a place suitable for such conditions such as a river or the waterside of a pond, a survival rate close to 100% It will be possible. In addition, it is possible to extend the number of days until construction by using a site storage system such as storage in a constant temperature warehouse.

As a construction method, there is a method in which the bamboo material is laid sideways as it is and embedded at an angle in the ground so that only one end is exposed to the surface of the ground, and the bamboo material is passed over the piles piled up on the sloping ground. There is also a way to assemble the wood. Among them, the method of embedding the bamboo material as it is sideways and obliquely embedded is particularly easy to construct, and this method is used when the urgency of earth retaining is relatively low or when placing emphasis on greening on a gentle slope. Is suitable. Further, in the method of assembling bamboo debris, the assembled bamboo debris itself also functions as earth retaining, so this method is suitable for restoration of collapse slopes due to disasters or for earth retaining on steep slopes.

[0009] In the construction, as a pretreatment, it is preferable to make a hole in the culm between the nodes of the bamboo material and inject water. Further, it is preferable that the bamboo material has a length of 2 culms and 3 joints or more. In the case of the method of embedding the bamboo material as it is by laying it sideways, keep the embedding depth of the knot on the deepest side of the bamboo material within 10 cm underground, leaving the opposite side slightly above the ground. Is good. By doing so, the rooting rate will increase in both cases.

As a bamboo material, Horai bamboo is particularly suitable.
And, especially in the case of third-grade bamboo, the rooting rate is high, and up to fifth grade is possible. However, not all parts of these bamboos can be used as a material, and in the third graders, the part about 1.5 m from the tips does not root, so it is necessary to use other parts. And in the 5th grade, the rooted part is very small. If it is a solid material even in the second grade, the rooting rate may be higher than in the fifth grade.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is implemented as follows, for example.

FIG. 1 shows a first example of the embodiment. This example is, for example, a bamboo material 1 consisting of a stem part of a Horai bamboo of the third grade.
Is to be embedded horizontally in the ground as it is. In this case, the bamboo material 1 should be cut within 2 to 3 days (up to 5 days is possible) into 2 or 3 sections as shown in the figure, or longer than that in the appropriate period. Cut and use. In FIG. 1, a indicates a bamboo knot and b indicates a culm. Then, in the construction, as a pretreatment, a hole (not shown) is opened in the part of the culm b between the nodes a of the bamboo material 1 and water is poured therein. And the bamboo material 1
Is laid in a slot dug in the ground, the node a on one end side is slightly exposed on the ground surface g, and the node a on the other end side is slanted to a predetermined depth d, and covered with soil. The depth D of the embedding of the node a on the deepest side at that time is generally preferably 10 cm or less, although it depends on the soil quality. In this way, the required number of bamboo materials 1 are arranged in a column and embedded.

By carrying out the construction in this way, FIG.
As shown in (3), the root of the bamboo material 1 is rooted from the portion a and germinated. In FIG. 1, c is a bamboo root and d is a sprout. Then, as shown in FIG. 2, the bamboo 2 grows, the root c strongly extends downward, and it functions as soil retaining. In addition, the bamboo 2 that extends to the ground contributes to greening and is easy to adapt to the surrounding environment. Moreover, since the root c of the Horai bamboo grows strongly downward and does not spread laterally, the bamboo does not spread out unnecessarily to the periphery,
It is possible to manage vegetation and use roots systematically.

This method is particularly simple to construct and inexpensive
It is suitable for cases where the earth retaining function does not require urgency, or when greening also serves as earth retaining for a gentle slope.

This method can be used not only for on-site construction but also for producing bamboo shoots in fields. By producing bamboo shoots by this method, it is possible to promote the production of bamboo shoots in the field and simplify production and shipping.

As the bamboo material 1, Horai bamboo is particularly suitable. And especially bamboo of the third grade is good and it is possible up to the fifth grade. In addition, not only Hourai bamboo but also other bamboo species can be used, and other bamboo can be used as long as it has a property that the roots strongly extend downward. Although the construction time varies depending on the type of bamboo used, etc., it is generally preferable from December to June.

Next, the second embodiment of the embodiment shown in FIGS.
An example will be described. This example builds bamboo debris. As the bamboo material 1, for example, the bamboo material 1 made of the stem portion of the third grader Horai bamboo is used. Bamboo material 1 in this case
Is, in the proper construction, cut bamboo from 2 to 3 days (possible up to 5 days) with 2 or more culms and a length suitable for making chisel. Use multiple. Then, the piles 3 are lined up at a predetermined interval on the sloping ground s, the bamboo material 1 is passed over the piles 3 and they are assembled into a streak (fence) as shown in the figure, and a buried soil f is placed behind them. In the figure, a indicates a bamboo node and b indicates a culm. In this case as well, in the case of construction, as a pretreatment, a hole (not shown) is made in the culm portion between the nodes a of the bamboo material 1 to pour water.

With this construction, the bamboo material 1 roots and germinates from the portion of the node a which is in contact with the soil. 3 to 5, c is a bamboo root and d is a sprout. Also in this case, as shown in FIG. 2, the bamboo 2 grows and the root c strongly extends downward to function as an earth retaining material.
Contribute to greening. Also in this case, the bamboo does not spread around the area.

According to this method, the bamboo waste itself functions as an earth retaining material until the root grows. Therefore, this method is suitable for the case where the earth retaining is urgent such as the restoration of the collapse slope due to a disaster and the case where a strong earth retaining function is required from the beginning such as a steep slope. Moreover, the construction cost can be reduced as compared with earth retaining using concrete. Also in this case, the Horai bamboo is particularly suitable as the bamboo material 1, and the bamboo of the third grade is particularly preferable and the bamboo of the fifth grade is possible. In addition, not only Hourai bamboo but also other bamboo species can be used, and any other bamboo can be used as long as the bamboo has the property that the root extends strongly downward. In general, the construction period is preferably from December to June.

[0020]

The method of retaining soil using bamboo vegetation according to the present invention is a soil for preventing the collapse of slopes in forests and land development, restoring slopes destroyed by disasters, and repairing revetments on rivers and ponds. The fastening can be performed strongly, the discomfort with the surrounding environment can be reduced, and the greening can be actively promoted. Further, the construction is simple and the construction cost is low.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a construction state of a first example of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state in which bamboo grows and roots grow.

FIG. 3 is an explanatory view showing a construction state of a second example of the embodiment of the present invention as seen from the front.

FIG. 4 is an explanatory view of a construction state of the second example viewed from a side surface.

FIG. 5 is an explanatory view of the construction state of the second example as seen from above.

[Explanation of symbols]

1 Bamboo material 2 bamboo 3 piles Section a b culm c root d sprout

Continuation of the front page (56) Reference JP-A-10-229745 (JP, A) JP-A-9-228340 (JP, A) Actual Kaihei 7-10041 (JP, U) (58) Fields investigated (Int .Cl. ⁷ , DB name) E02D 17/20 102-103 A01G 1/00 301 E02D 17/18 E02B 3/12

Claims (6)

(57) [Claims] 1. Up to 5 pieces after cutting, which has the property of rooting and germinating from the part of the node in contact with soil and extending the root downward.
With bamboo material formed off the stalk of Horai bamboo 2 culm Section 3 or more in length until the day, and nodes of the bamboo material as a pre-treatment
A hole is made in the culm between the knots and water is poured into the knot , and the bamboo material is laid horizontally so that at least a part of each knot touches the soil and is embedded in the knot. A soil retaining method using bamboo vegetation, which is characterized by rooting from the root and extending downwards. 2. A maximum of 5 after cutting, which has the property of rooting and germination from the part of the node in contact with soil and the roots extending downward.
With bamboo material formed off the stalk of Horai bamboo 2 culm Section 3 or more in length until the day, and nodes of the bamboo material as a pre-treatment
Water is made by making a hole in the culm between the knots, and the bamboo material is laid horizontally so that only one end is exposed to the ground, and it is embedded obliquely into the ground. From the knots that touch the soil of the bamboo material A soil retaining method using bamboo vegetation characterized by rooting and retaining soil by roots extending downward. 3. A maximum of 5 after cutting, which has the property of rooting and germination from the node part in contact with soil and the roots extending downward.
With bamboo material formed off the stalk of Horai bamboo 2 culm Section 3 or more in length until the day, and nodes of the bamboo material as a pre-treatment
Drill a hole in the culm between the knots and fill it with water , pass the bamboo material over the piles that are lined up on the sloping ground to assemble the bamboo debris, bury the soil behind it , and put it in the soil of the bamboo material. A method of retaining soil using bamboo vegetation, which is characterized by rooting from the part of the node that touches and rooting extending downward. 4. The method of retaining soil using bamboo vegetation according to claim 2, wherein the embedding depth of the knot on the deepest side of the bamboo material is 10 cm or less underground. 5. The method of retaining soil using bamboo vegetation according to claim 1, which is used for preventing or restoring slopes of a forest or a reclaimed land. 6. The method of retaining soil using bamboo vegetation according to claim 1, which is used for revetment improvement and greening of rivers or ponds.