JP2002070024A - Earth retaining frame and earth retaining method of slope or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth retaining frame without impairing natural scenery capable of creating such a nature as various living things can be bred after sufficient strength is ensured. SOLUTION: The earth retaining frame is constituted of a slope formation section 2 by arranging a plurality of logs 2-1 in parallel at intervals preventing an outflow of earth and sand and a bottom formation section 3 connecting a plurality of foundation logs 3-1 to the lower ends of the slope formation section 2 at regular intervals and fixing the other ends of the foundation logs 3-1 with foundation tie logs, and the earth retaining frame is so constituted that the open end of the slope formation section is fixed to the open end of the bottom formation section with a stretch member 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth retaining frame capable of preventing earth and sand from flowing out on a slope such as a mountain slope or a revetment and a method of retaining earth on a slope using the earth retaining frame.

[0002]

2. Description of the Related Art Conventionally, as a method of constructing earth retaining material for preventing earth and sand from flowing out from a slope of a mountain forest, or embankment of a revetment of a river embankment, a method of directly hitting a concrete pile on a slope, a concrete secondary product. A method using a concrete block, a method of stacking stones, and the like are known. A construction method using a concrete pile or a construction method using a concrete block is an excellent method that is easy to perform and has sufficient strength, and is widely used in recent years due to a shortage of forest workers and an aging population. However, such an earth retaining method damages the natural scenery because the slope to be earthed and the entire riverbank are covered with concrete. In addition, when the concrete is hit or the concrete block is manufactured and transported, energy is wasted, and the construction cost is high in consideration of the environmental cost.

In recent years, in rivers and mountain forests, importance has been placed on environmental protection and harmony, and an environment in which various organisms can grow has been required. Earth retaining and revetment using concrete piles and concrete blocks,
Since the entire ground surface is covered with concrete piles, it is difficult to grow various organisms such as microorganisms, plants, insects, etc., and it is not possible to respond to the need for environmental protection and harmony.

In recent years, there has been proposed a technique relating to a log frame for retaining earth and sand by using a log material (Japanese Patent Laid-Open No. 11-81249).

FIG. 3 is a schematic sectional view for explaining an example of construction of a sediment receiving frame proposed in Japanese Patent Application Laid-Open No. H11-81249. As shown in FIG. 3, a sediment receiving frame 8 proposed in Japanese Patent Application Laid-Open No. H11-81249 connects a plurality of sediment receiving logs 9 for damping earth and the like and joins them with a log 10 to form a sediment receiving log. Log 11 that can be rotated on the upper part of
Is fixed with a log 12 for fixing to make an earth and sand receiving frame, and earth retaining is performed. Since concrete or the like is not used,
It is excellent in environmental protection and harmony.

[0006]

However, in order to retain the soil using the above-mentioned conventional sediment receiving frame, in order to embed and fix the connecting log material 10 having a protruding lower end, the lowermost lowermost sediment receiving log material is used. The soil 12 has to be dug by the length (L) protruding from 9, which requires labor for construction on site and increases costs.

The stay log 11 is rotatably joined to the upper end of the earth receiving log and is only buried in the earth and sand in the earth receiving frame. Therefore, the sediment receiving log material 9 is not completely fixed by the retaining log material 11, and there is a risk that the sediment receiving frame 8 falls down depending on the earth pressure and the earth and sand flows out.

An object of the present invention is to provide an earth retaining frame and an earth which can create an environment in which various organisms can grow while securing sufficient strength and do not impair the natural scenery. It is to provide a fastening method.

[0009]

As a result of repeated studies to solve the above problems, it has been found that the above problems can be solved by devising the structure of the log material of the retaining frame, and the present invention has been completed. Was.

That is, according to the present invention, there is provided a slope forming portion in which a plurality of earth retaining logs are arranged in parallel at intervals at which earth and sand do not flow out, and the earth retaining logs are fixed by joining logs. The bottom log is joined with a plurality of base logs at the lower end of the slope forming portion, and the other end of the base log is fixed to the base connecting logs with the bottom forming portion, and the open end of the slope forming portion and the bottom forming portion are formed. The present invention relates to an earth retaining frame whose open end is fixed by a tension member.

[0011] The present invention also provides a slope forming section in which a plurality of retaining logs are arranged at intervals at which earth and sand do not flow out, and the retaining logs are fixed with joining logs, and a plurality of retaining logs are provided at predetermined intervals. The base log is joined to the lower end of the slope forming part, and the other end of the base log is connected to the base and fixed to the bottom forming part with a bottom forming part,
Place the earth retaining frame where the open end of the slope forming part and the open end of the bottom surface forming part are fixed by a tension member at the earth retaining place, fill the earth retaining frame with the earth and sand, and press-contact. The present invention relates to a method of retaining earth on a slope or the like, which is a feature of the method.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The earth retaining frame of the present invention comprises a slope forming portion and a bottom forming portion joined to a lower end thereof.

The earth retaining frame of the present invention is disclosed in Japanese Patent Application Laid-Open No. H11-812.
As in the earth retaining frame described in Japanese Patent Publication No. 49, in order to bury a connecting log material having a protruding lower end, there is no need to dig a groove or a hole in the construction site, and the bottom component is placed in the construction site, Since it is only necessary to fill the earth retaining frame with earth and sand and press the earth, the construction labor can be reduced, leading to cost reduction.

The slope component of the earth retaining frame of the present invention comprises earth retaining logs arranged in parallel at intervals such that earth and sand do not flow out,
The earth retaining log is fixed with a joining log.

The interval at which the earth and sand does not flow out varies depending on the type of the earth and sand, but is, for example, about 30 to 80 mm.

The earth retaining logs may be parallel to either the vertical direction or the horizontal direction as long as the above distance is maintained. By using earth retaining logs, there is an effect that the earth pressure can be uniformly received and the appearance is good.

The bottom forming portion of the earth retaining frame of the present invention is formed by joining a plurality of foundation logs to the lower end of the slope forming portion at predetermined intervals.
The other end of the base log material is fixed with a base connection log material. The predetermined interval is such an interval that when the earth retaining frame is filled with earth and sand and pressed against, the bottom surface forming portion is stabilized by the earth pressure and the earth retaining frame does not collapse, and can be appropriately selected. For example, it may be about 300 to 600 mm.

The slope forming portion and the bottom forming portion of the earth retaining frame of the present invention are preferably joined so as to be rotatable. By removing the tension member by rotatably joining, the slope forming part and the bottom part forming part can be folded and transported, and by attaching the tension member at the construction site and completing the earth retaining frame , Work efficiency can be increased.

In the present invention, the joining between the earth retaining log and the joining log, the joining between the base log and the base connecting log,
The joining between the slope forming portion and the bottom forming portion is not particularly limited, but may be, for example, a bolt and a nut, a scab and the like.

[0020] The earth retaining frame of the present invention is constructed by
In order to prevent the slope formation part from falling and the earth and sand from flowing out,
The open end of the slope forming part and the open end of the bottom face forming part are fixed by a tension member. The tension member is not particularly limited as long as it has a strength against the earth pressure, and examples thereof include a metal member.

It is preferable to use a thinned log as the log of the earth retaining frame of the present invention. By using thinned logs, forest resources can be used effectively and contribute to economic development in depopulated areas.

In order to perform earth retaining using the earth retaining frame of the present invention, first, the ground serving as a reference is leveled to form a base surface, and the earth retaining frame of the present invention is provided on the base surface, and the bottom forming portion is provided. The earth retaining material may be placed on the lower side, filled with earth and sand in the earth retaining frame, press-contacted, and earth retaining may be performed. The number of earth retaining steps may be appropriately determined according to the construction site.

In the present invention, as the earth and sand to be filled, crushed stone, earth and sand generated at a construction site, and residual soil generated at a construction site may be used. When the earth retaining frame of the present invention is applied to a revetment, it is only necessary to use crushed stone as a filler, to give weight and to stabilize. Also, in order to prevent excavation of the riverbed, the use of boulders or the like of the river makes the construction simpler and more rapid than the conventional log-set woodwork sinking, resulting in a significant cost reduction.

Means for pressing the earth and sand is not particularly limited, and examples thereof include a compact rolling plate.

When earth retaining is performed using the earth retaining frame of the present invention, it is preferable that the vegetation sheet is arranged inside the earth retaining frame to perform the earth retaining. By placing the vegetation sheet and retaining the soil, after construction, plants grow on the slope,
The landscape after the earth retaining work can be made more natural. The vegetation sheet is, for example, a material that does not leave any unnecessary material due to natural materials, protects the natural environment, and can be reliably greened even on hard soil or soft rock land (with palm fiber seeds). For construction work, a tree of eel and the like may be inserted.

Further, in order to further reduce the leakage of earth and sand from between the earth retaining logs, an earth and sand outflow prevention mat may be provided in the slope forming portion. As such an earth retaining prevention mat, for example, a fine mat composed of a coconut fiber net is preferable, and a mat that can prevent surface erosion is preferable.

At the time of earth retaining, in order to more firmly fix the earth retaining frame to the ground, the bottom surface forming portion may be fixed to the ground by anchoring means such as an anchor pin.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The earth retaining frame and the earth retaining method of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG. 1 is a view for explaining a retaining structure of the present invention.
(A) is a perspective view, (b) is a front view, (c) is a right side view, and (d) is a partial plan view.

As is clear from the perspective view of FIG.
The earth retaining frame 1 of the present invention comprises a slope forming portion 2 and a bottom forming portion 3 joined to a lower end thereof. The open end of the slope forming part 2 and the open end of the bottom face forming part 3 are fixed by a tension member 4 at at least two places. Even if the foundation soil surface is flattened, a mechanically stable triangle is formed by the slope forming part 2, the bottom forming part 3, and the tension member 4, so that even if the soil is soft, it can be slipped by the earth pressure. And the danger of collapse.

The structure of the slope forming portion 2 of the retaining frame 1 of the present invention will be described with reference to the front view of FIG.

The slope forming portion 2 is formed by arranging a plurality of earth retaining logs 2-1 in parallel in the vertical direction, and joining them with bolts and nuts 2 by joining logs 2-2. The interval between the retaining logs 2-1 is 30 as shown in the above embodiment.
By setting it to about 60 mm, earth retaining log 2-1
It is possible to prevent earth and sand from leaking from between.

Although not shown in FIG. 1, the slope forming section 2
To increase the strength of the earth retaining log 2-2, it may be fixed with a joining member such as a breather so as to penetrate vertically above and below the earth retaining log 2-2.

The number of the retaining logs 2-1 may be appropriately adjusted according to the construction site where the retaining is performed.

As is clear from the perspective view of FIG. 1A and the right side view of FIG. 1C, the bottom surface forming part 3 is formed on the lower end of the joining log 2-2 of the slope forming part 2 by the base. A plurality of log materials 3-1 are joined at predetermined intervals, and the other end of the base log material 3-1 is fixed to a base connection log material 3-2. Since the base log 3-1 and the base connection log 3-2 form a flat surface by joining, the bottom surface forming portion 2 is stabilized by the downward earth pressure, and in combination with the operation with the tension member 4, the earth retaining frame is formed. It is unlikely that 1 will collapse.

The joining angle between the slope forming section 2 and the bottom forming section 3 may be appropriately adjusted according to the construction site.

The open end of the slope forming section 2 and the open end of the bottom forming section 3 are fixed by a tension member 4, and the three sides of the slope forming section 2, the bottom forming section 3, and the tension member 4 are used for dynamics. Form stable triangles.

FIG. 1D is a partial plan view of the open end portion of the bottom surface forming portion 2. The tension members 4 are provided according to the number of the base logs 3-1; however, the present invention is not limited to this example, and it is sufficient if there are at least two at both ends, and the number may be appropriately selected.

Embodiment 2 FIG. 2 is a schematic sectional view for explaining an earth retaining method using the earth retaining frame 1 of the present invention.

The place where the earth retaining work is to be constructed is leveled to obtain a foundation surface 6. The earth retaining frame 1 is placed on the base surface such that the bottom surface forming part 3 of the present invention is at the bottom. The earth retaining frame 1 is filled with earth and sand 7, and is sufficiently pressed against the earth to be earth retaining. The number of steps to be retained may be appropriately determined according to the topography of the construction site.

Although not shown, by providing a vegetation sheet in the retaining frame 1 and filling it with earth and sand, the plant grows after the construction and an effect of making the landscape more natural is obtained.

Although not shown, a mat for preventing earth and sand outflow is provided in the earth retaining frame 1 and filled with earth and sand, thereby preventing earth and sand from leaking between the earth retaining logs 2-1. it can.

[0043]

According to the first aspect of the present invention, since the present invention is made of a log material, it is possible to secure biodiversity without impairing the landscape after the earth retaining work is performed, and it is possible to secure a slope. Since the forming portion and the bottom surface forming portion are fixed by the tension members, there is little danger that the earth retaining frame collapses due to earth pressure after construction.

According to the second aspect of the present invention, since the earth retaining logs are arranged in parallel in the vertical direction, the earth pressure can be uniformly received and the appearance is good.

According to the third aspect of the present invention, the slope forming portion and the bottom surface forming portion are rotatably joined, so that they can be folded and transported, thereby increasing the working efficiency.

According to the fourth aspect of the present invention, since it is only necessary to mount the earth retaining frame, fill the earth retaining sand with the earth retaining frame and press the earth retaining frame, the working efficiency can be improved and the cost can be reduced.

According to the fifth aspect of the present invention, since the thinned wood is used, the forest resources are effectively used and the economical development in the depopulated area is contributed.

According to the sixth aspect of the present invention, since the vegetation sheet is provided inside the slope forming portion, the plant grows after construction and is effective for maintaining the landscape.

According to the seventh aspect of the present invention, since the earth and sand outflow prevention mat is provided inside the slope forming portion, the outflow of earth and sand can be further prevented.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of an earth retaining frame of the present invention, wherein (a) is a perspective view, (b) is a front view, (c) is a right side view, and (d) is a partial plan view.

FIG. 2 is a schematic sectional view illustrating the earth retaining method of the present invention.

FIG. 3 is a schematic cross-sectional view of an earth retaining structure on which a conventional earth retaining frame is constructed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Earth retaining frame 2 Slope forming part 2-1 Earth retaining log 2-2 Joining log 3 Bottom forming part 3-1 Basic log 3-2 Basic connecting log 4 Tension member 5 Bolt / nut

Claims (7)

[Claims] 1. A slope forming part in which a plurality of retaining logs are arranged in parallel at intervals at which sediment does not flow out, and the plurality of foundation logs are fixed at predetermined intervals. The log is joined to the lower end of the slope forming part, and the bottom end of the base log is fixed to the base by connecting the other end of the base log with the log, and the open end of the slope forming part and the open end of the bottom forming part are formed. An earth retaining frame fixed by a tension member. 2. The retaining frame according to claim 1, wherein the retaining logs are arranged in parallel in the vertical direction. 3. The earth retaining frame according to claim 1, wherein the slope forming section and the bottom face forming section are rotatably joined. 4. The retaining frame according to claim 1, wherein the retaining logs, the joining logs, the base logs and the base connecting logs are thinned materials. 5. A slope forming section in which a plurality of retaining logs are arranged at intervals at which sediment does not flow out, and the retaining logs are fixed with joining logs, and a plurality of base logs at predetermined intervals. Is joined to the lower end of the slope forming part, and the other end of the base log is connected to the base and fixed to the bottom with a bottom material, and the open end of the slope forming part and the open end of the bottom forming part are stretched. An earth retaining method for sloping ground or the like, wherein the earth retaining frame fixed by a member is placed at a place where earth retaining is to be performed, and earth retaining material is filled in the earth retaining frame and pressed against the soil. 6. The earth retaining method according to claim 5, wherein a vegetation sheet is disposed inside the slope component member, and earth retaining material is filled in the earth retaining frame and pressed against the soil retaining frame. 7. The earth retaining method according to claim 5, wherein a mat for preventing earth and sand outflow is arranged inside the slope component member, and the earth retaining material is filled in the earth retaining frame and pressed against the soil.