JP2000080654A - Reinforced earth work method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the outflow of sediment for greening by directly spreading a fresh lawn mat on the inside of the winding portion of a grid material, stretching it on the front face of the fill, stretching the remaining portion to the upper side, repeating the procedures, and filling soil in sequence. SOLUTION: A grid material 3 is installed on the ground at the construction site 2 of a retaining wall near the inclined ground 1, and a retaining unit 4 is arranged in the lateral direction on its tip section 3A. The grounding portion 41 side of the retaining unit 4 is fixed to the ground, a fresh lawn mat 6 is stretched, and a water holding band 8 is fitted on the inclined ground 1 side. Soil 9 is filled between the retaining unit 4 and the inclined ground 1 and is compacted from the upper side. The first-step fill is generated, the second-step and subsequent fills are generated in the same procedures, and multiple retaining units 4 and the soil 9 are stacked to construct a retaining wall. The fresh lawn mat 6 is directly stretched on the retaining unit 4, and the holding function of sediment can be increased without separately requiring the use of auxiliary materiel.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention is suitable for constructing a retaining wall, particularly a steeply inclined ground or a retaining wall having an inclination angle of 70 to 80 degrees, on an inclined ground such as a ground, a land development site, a road, and the like. The present invention relates to a reinforced earth method using a grid material that enables greening.

[0002]

2. Description of the Related Art Conventionally, as a reinforced earth method of this kind, a tail armer method is known.
Using a plurality of wall materials such as concrete panels to which strips of a predetermined length having a plurality of anchor plates are connected, and sequentially stacking and connecting the respective wall materials vertically near an inclined ground such as ground, It is said that the strip provided on each wall material is spread, the embankment is put on the strip and rolled, and then the strip provided on the next wall material is spread and the embankment is put and rolled. By repeating the operation, the stability of the embankment itself is strengthened by the strip and the rolled embankment, and the strip and the embankment support the wall materials to form a stable retaining wall. It is like that.

However, in the above-mentioned tail arming method, since a heavy wall material is used, it is not only difficult to carry it, but also it is necessary to lift the wall material when constructing the retaining wall. The construction of the retaining wall also required heavy labor.

Therefore, in order to solve the above-mentioned problems, as shown in FIG. 6, high-performance continuous fibers such as glass fibers are used to improve the corrosion resistance at the location where the retaining wall is constructed near the sloping ground such as the ground. A so-called net-shaped geotextile A (grid material) integrally formed in a grid shape while being impregnated with an excellent synthetic resin is laid, and an embankment B is put on the geotextile A, and a side portion of the embankment B While a stake C that sets the inclination angle of the retaining wall to be constructed is provided,
At the side of the embankment B, the sandbags D are stacked on the geotextile A along the tents C in a plurality of stages, and after a predetermined number of stacks, the embankment B is rolled, and the sandbags D are rolled up by the geotextile A. After that, the retaining wall is constructed by laying the geotextile A again, putting the embankment B on the geotextile A, stacking a plurality of sandbags D, rolling the embankment B, and rolling the geotextile A around the geotextile A. A so-called Nestem method has been used. According to such a Nestem construction method, the labor for transporting various construction materials and the construction work can be saved slightly as compared with the above-mentioned Terre Arme construction method.

However, even when the above Nestem method is adopted, the work of stacking the sandbags D must be performed manually, and the weight per sandbag D is about 30 kg. Stacking these heavy sandbags D over a plurality of stages by hand is extremely heavy labor. In addition, since the work of packing and stacking the sandbags and the like in each sandbag D is performed manually, various operations require time. There was also a problem that the construction period was prolonged. In particular, in forming a steep sloping ground or a retaining wall, the accumulation of the sandbags D is an even more difficult operation. Neither of the above methods intended to green the sloped ground or retaining wall.

In order to solve this problem more effectively, as shown in FIG. 5, a vegetation sheet or vegetation mat 01 in which seeds, fertilizer, soil improvement material, etc. are attached to a coconut sheet or a polyethylene sheet is used. Retaining unit 0 made of welded wire mesh or expanded metal
2 is set inside the front side net portion 03.

[0007]

The above-mentioned method is a preferable reinforcing earth method because the retaining wall constructed by germinating and growing the seeds contained in the vegetation sheet or the vegetation mat 01 can be greened. However, since the rhizome does not exhibit the function of retaining soil by the time the vegetation grows, it is necessary to use a net with a small mesh size and a coconut sheet with a large basis weight. For this reason, it was difficult to introduce trees having large stems. In addition, it is difficult to supply water to vegetation seeds and the like on steeply sloping grounds and retaining walls, and vegetation sheets and mats are easily dried, and vegetation seeds and the like may die early.

According to the present invention, as described above, in a reinforced earth method using a grid material, greening is enabled, and at the same time, outflow of sediment is successfully prevented, and trees having large stems can be introduced. Make it an issue.

[0009]

Means for Solving the Problems In a reinforced earth method using a grid material, a part of the grid material laid on a construction site of a retaining wall is left for entanglement, and raw grass is directly provided inside the entanglement portion. Attach a mat, fill the soil on the grid material and squeeze it, then expand the entrainment portion of this grid material on the front of the embankment, further expand the remaining portion to the upper side, and then follow the above procedure Is repeated to fill the upper row sequentially.

According to this means, a fresh turf mat is directly stretched onto the grid material while being stretched, so that a net having a small mesh weight or a large net weight is provided like a conventional vegetation sheet or vegetation mat is provided. Even without the use of separate auxiliary materials such as palm sheets, the already lush lawn rhizome greatly enhances the ability to retain earth and sand.

[0011] As a work procedure, whether to first spread the lawn mat on the grid material or to fill the grid material first is appropriately selected according to the situation at the site.

Therefore, the invention according to claim 1 is
It has the following effects. Since the grid material is lightweight, it can be easily and easily transported to a work site where a retaining wall is constructed or carried during the construction work. By sticking the lawn, greening can be achieved already from the beginning of construction, and the landscape can be quickly and preferably improved. In addition, because the rhizomes of the already overgrown lawn can greatly enhance the function of retaining soil, the construction process can be simplified,
An inexpensive reinforced earth method can be provided. At the same time, it is not necessary to use an auxiliary material such as a net with a small mesh or a coconut sheet with a large weight as in the related art, so that a tree having a large stem can be introduced. Further, compared with the conventional case where sandbags are stacked, the construction work is remarkably improved. In other words, even on a steeply sloping ground or retaining wall, since it is released from the heavy work of stacking the sandbags, the formation can be performed easily and lightly.

According to a second aspect of the present invention, a net-shaped reinforcing embankment unit for reinforcing embankment is disposed on the retaining wall construction side, and then a grass turf mat is directly attached to the inside of the reinforcing embankment embankment unit. Thereafter, the soil is laid on the grid material and compacted, and thereafter the above procedure is repeated to fill the upper tier one by one.

According to this means, the earth retaining unit functions as a so-called stake to enter the soil on the retaining wall construction side. By attaching a fresh turf mat directly to the soil retaining unit while stretching it, separate auxiliary materials such as a net with a small mesh and a coconut sheet with a large weight are used separately, like a conventional vegetation sheet or a vegetation mat. If not, the already overgrown lawn rhizome greatly enhances sediment retention.

Therefore, the invention according to claim 2 is
It has the following effects. Since the net-like reinforcing embankment embankment unit and the grid material are lightweight, they can be easily and easily transported to a work site where a retaining wall is constructed or carried during the construction work. By sticking the lawn, greening can be achieved already from the beginning of construction, and the landscape can be quickly and preferably improved. In addition, since the rhizomes of the already-grown lawn can greatly enhance the function of retaining soil, the construction process can be simplified and an inexpensive reinforced earth method can be provided. At the same time, it is not necessary to use an auxiliary material such as a net with a small mesh or a coconut sheet with a large weight as in the related art, so that a tree having a large stem can be introduced. Also, the construction work is remarkably improved as compared with the conventional case where sandbags are stacked. In other words, even on a steeply sloping ground or retaining wall, since it is released from the heavy work of stacking the sandbags, the formation can be performed easily and lightly. In addition, since the retaining unit serves as a so-called siding function for putting soil into the retaining wall construction side, embankment and compaction work can be performed with much smaller dimensional errors, and can be performed more easily and lightly. .

According to a second aspect of the present invention, as described in the third aspect, after a fresh turf mat is directly attached to the inside of the soil retaining unit, a water retaining means is provided on a side on which the turf soil is embanked. It is desirable to fill the soil on the grid material afterwards. Even on steep slopes and retaining walls,
This is because the water supply to the lawn is sufficiently performed, and there is no risk of dying early, and the desired greening can be achieved satisfactorily.

According to a fourth aspect of the present invention, the earth retaining unit includes a ground portion grounded to the ground and a front portion connected to the ground portion. It is desirable that the lawn is adhered to the inside of the car.
This is because the lawn can be prevented from drying properly, and at the same time, the earth retaining unit can be more stably installed, and the desired steep embankment can be successfully created.

The raw turf mat described in each of the above claims is usually 30 cm × 37.1 cm or 15 cm ×
With a standard of 37.1 cm, for example, Korai turf and wild turf Zoisha turf as native Japanese species can be adopted.
5 to 0.1 m × 10. A lawn in the form of a roll, which is wound in a roll shape with a standard of ~ 5.0 m and is configured to be stretched on site, is also employed. As the roll-shaped lawn, a Zoisha-type or exotic Kentucky bluegrass or bentgrass-type lawn is used. In particular, when a lawn in the form of a roll is adopted, the number of fixing portions of the lawn to the grid material and the earth retaining unit can be reduced, the workability is good, and the standard of the lawn mat is large as described above. As a result, the soil retaining effect is more effectively exhibited, which is advantageous.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of a reinforced earth method according to the present invention will be described below with reference to the drawings. In the reinforced earth method of the present invention, first, as shown in FIG. 1, first, a grid material 3 is laid on the ground of a retaining wall construction point 2 near an inclined ground 1 such as a ground.

Next, a plurality of the retaining units 4 are laterally aligned on the leading end 3A of the grid member 3, and the grounding portion 41 side of each retaining unit 4 is connected to the ground via a plurality of anchor pins 5. Fixed to. That is, the grid material 3
That is, the installation part of the unit 4 is integrated with the anchor pin 5.

After the fixing of the retaining unit 4 is completed, the tip of the leaf is then moved to the inside of the retaining unit 4, that is, the entire surface on the side where the grid material 3 exists (the side of the inclined ground 1 such as the ground). In this posture toward the soil retaining unit 4 side, the roots are in a posture facing the inclined ground 1 side such as the ground, and the vertical and horizontal dimensions as an example of the raw grass mat 6 are 40.
Raw turf wound in a roll shape of about 50 cm × 100 cm is stretched through a fixture 7 such as a wire. In the example shown,
Although it is stretched in the vertical direction, it may be in the horizontal direction as needed.

Next, the back side of the stretched raw grass mat,
That is, the water retention means 8 such as a water retention sheet or a water retention zone is attached to the inclined ground 1 such as the ground at predetermined intervals in the vertical direction, for example, at intervals of 30 to 50 cm. At the time of attachment, although not shown, a fixture such as a wire is employed.

Next, the soil 9 is buried with a bulldozer or the like between the earth retaining unit 4 and the sloping ground on the grid material 3 and is compacted from above by a rammer compactor or the like.

After the first-stage embankment is formed as described above, the second-stage embankment is formed in the same procedure as described above.
Thereafter, by repeating the same operation, as shown in FIGS. 1 and 3, a plurality of the earth retaining units 4 and the soil 9 are sequentially stacked at a predetermined height to construct a retaining wall. .

As described above, according to the reinforced earth method shown in the above embodiment, the conventional vegetation sheet or vegetation mat is provided by directly spreading the turf mat 6 on the earth retaining unit 4. Like other things, the rhizomes of the already-grown grass turf mat 6 greatly enhance the soil and sand holding function without using any additional auxiliary materials such as a net with a small mesh size or a coconut sheet with a large basis weight.

Therefore, since the grid member 3 and the retaining unit 4 are light in weight, they can be easily and easily transported to a work site where a retaining wall is constructed or carried during the construction work. In addition, by attaching the fresh turf mat 6, greening can be achieved from the beginning of construction, and the landscape can be quickly and preferably improved. In addition, since the rhizomes of the grass turf mat 6 that has already prospered can greatly enhance the function of retaining earth and sand, the construction process can be simplified, and an inexpensive reinforcing earth method can be provided. At the same time, unlike the related art, there is no need to use an auxiliary material such as a net with a small mesh size or a coconut sheet with a large basis weight, so that it is possible to introduce a tree T having a large stem (see FIG. 3). Further, compared with the conventional case where sandbags are stacked, the construction work is remarkably improved. In other words, even on a steeply sloping ground or retaining wall, since it is released from the heavy work of stacking the sandbags, the formation can be performed easily and lightly.

Also, after the fresh turf mat 6 is directly attached to the inside of the soil retaining unit 4, a water retaining means 8 is provided on the side of the fresh turf mat 6 on which the soil 9 is embanked. Since the soil 9 is buried in the ground, even if the ground or the retaining wall is steep, the water supply to the raw turf mat 6 is sufficiently performed, and there is no possibility of dying early, and the desired greening can be achieved satisfactorily. .

Further, the earth retaining unit 4 includes a grounding portion 41 grounded to the ground, and a front portion 42 connected to the grounding portion 41. The raw portion is provided inside the front portion 42. Since the turf mat 6 is stuck, drying of the raw turf mat 6 can be prevented well, the soil retaining unit 4 can be more stably installed, and a desired steep embankment can be successfully formed.

In the above method, the grid material 3
Is formed by integrally forming a high-performance continuous fiber such as a glass fiber into a net while impregnating the resin with excellent corrosion resistance. More specifically, a wire mesh or a high-tensile plastic wire is used as the material. In the present invention, a plastic net obtained by weaving and knitting a high-tensile plastic wire in a lattice shape is employed. The line width is about 3 to 10 mm, and the size is, for example, 100 mm in length and 30 to 100 mm in width.

The earth retaining unit 4 includes a welding wire mesh,
As shown in FIG. 2, the expanded metal or the like is bent, and as shown in FIG. 2, a grounding portion 41 grounded to the ground and a predetermined inclination gradient (set as appropriate as necessary, (In degrees) and a front portion 42 integrally formed at the same time, and is formed in a deformed L-shape in a side view. Such a soil retaining unit 4 has left and right side portions and upper and rear portions opened respectively. Further, the size is set to about 100 mm and about 30 to 100 cm in width. This retaining unit 4 has a normal height of 120.
cm, the horizontal width is 180 cm to 720 cm, and the front and rear depth (the front and rear width of the ground contact portion) is 40 to 50 cm. The soil retaining unit 4 functions as a so-called siding for putting soil into the retaining wall construction side. Therefore,
The embankment and compaction work can be performed with much less dimensional errors, and can be performed more easily and lightly.

The material of the retaining unit 4, the anchor pin 5, and the fixing tool 7 may be a zinc-plated or vinyl resin-coated iron wire, an aluminum alloy, or the like.
Stainless steel is used.

The grass turf mat 6 employed in each of the above embodiments is usually 30 cm × 37.1 cm, or 15 cm.
A standard of cm × 37.1 cm, for example, Korai turf as a native species of Japan and Zoisha turf of wild turf can be adopted. Also, as shown, 0.5 to 0.1 m × 10. ~
A rolled lawn mat, which is wound in a roll and is configured to be spread on site at a standard of 5.0 m, is also adopted. As the roll-shaped raw grass mat, a Zoisha type or an exotic Kentucky Bluegrass or bent grass type raw grass mat is adopted. In particular, if the roll-shaped raw turf mat shown in the figure is adopted, the fixed portion of the raw turf mat to the grid material and the retaining unit can be reduced, the workability is good, and the standard of the raw turf mat is As described above, since it is large, the number of seams is small, and as a result, the earth retaining effect is more effectively exhibited, which is advantageous.

The rolled raw turf mat 6 is carried into the site by being wound into a roll. Also,
It is desirable that the raw grass mat 6 be grown so that a rough polyethylene net or a biodegradable plastic net is entangled when growing the raw grass mat. This is because the shape retaining property after being spread on the soil retaining unit 4 is maintained, and the desired functions of greening and retaining earth and sand are exhibited more favorably.

The water-retaining means 8 includes a water-retaining sheet or felt wound in a roll, a water-retaining sheet or felt cut into a strip, and a slender fertilizer bag containing a water-retaining agent. Adopted. Further, a bag made of nonwoven fabric is filled with at least one of acrylic or ethylene-based superabsorbent resin, vermiculite, perlite, peat moss, etc., or a sheet having these water absorbing materials attached thereto is used. .

(Second Embodiment) Next, means different from those described in the above embodiment will be described. In the first embodiment, a method using the retaining unit 4 is adopted, but in the present embodiment, as shown in FIG. The reinforcing earth method is performed using only the grid material 3. The specific method is as follows.

As shown in FIG. 4, first, a grid member 3 is laid on the ground at a construction site 2 of a retaining wall near an inclined ground 1 such as a ground, and the grid member 3 is attached to a plurality of anchor pins 5. To fix to the ground. At this time, at the tip side of a portion 3A (hereinafter simply referred to as a laying portion) laid on the ground of the construction point 2 of the retaining wall of the grid material 3, after the embankment of a predetermined size described later is formed, the embankment is placed on the front surface It is necessary to leave a dimension enough to be rolled up from the side, that is, the roll-up portion 3B.

When the laying of the grid material 3 is completed, the portion of the grid portion 3A corresponding to the front surface of the embankment, that is, the inside of the front portion 3a, that is, the inclined ground 1 The leaf tip is directed to the front surface portion 3a side of the grid material 3 over the entire surface of the grid material 3, and therefore, the root is directed to the inclined ground 1 side such as the ground, and the vertical and horizontal dimensions are 40 to 50 cm × 100 cm. The grass turf mat 6 wound in a roll shape is extended via a fixture 7 such as a wire. In the illustrated example, it is extended in the vertical direction, but may be extended in the horizontal direction as needed.

Next, on the back surface of the stretched raw turf mat 6, predetermined intervals in the vertical direction, for example, 30 to 50 cm
Water retention means 8 such as a water retention sheet or a water retention zone are attached at intervals. At the time of attachment, although not shown, a fixture such as a wire is employed.

Next, the soil 9 is buried by a bulltozer or the like on the grid material 3 from the boundary between the front surface portion 3a and the laying portion 3A to the sloping ground 1. Compact from the side. When the embankment is completed, the embankment covering portion 3b left at the tip of the front portion 3a of the winding portion 3A of the grid material 3 is spread on the embankment.

As described above, after the first-stage embankment is formed, the second-stage embankment is formed in the same procedure as described above.
Thereafter, by repeating the same work, as shown in FIG. 4, the soil 9 and the soil 9 are sequentially stacked at a predetermined height to construct a retaining wall.

As described above, according to the reinforced earth construction method shown in the above embodiment, the conventional vegetation sheet or vegetation mat can be formed by directly spreading the rolled turf mat 6 on the grid material 3. Even if a supplementary material such as a net with a small mesh size or a coconut sheet with a large basis weight is not separately used, the rhizome of the already-grown grass turf mat 6 greatly enhances the sediment holding function.

Therefore, since the grid member 3 is lightweight, it can be easily and easily transported to a work site where a retaining wall is constructed or carried during the construction work. In addition, by attaching the fresh turf mat 6, greening can be achieved from the beginning of construction, and the landscape can be quickly and preferably improved. In addition, since the rhizomes of the grass turf mat 6 that has already prospered can greatly enhance the function of retaining earth and sand, the construction process can be simplified, and an inexpensive reinforcing earth method can be provided. At the same time, unlike the related art, there is no need to use an auxiliary material such as a net with a small mesh size or a coconut sheet with a large basis weight, so that it is possible to introduce a tree T having a large stem (see FIG. 3). Further, compared with the conventional case where sandbags are stacked, the construction work is remarkably improved. In other words, even on steep sloping ground or retaining walls, you can be free from the heavy work of stacking these sandbags,
Easy and light construction is possible.

Further, after a roll-shaped raw grass mat 6 is directly attached to the inside of the grid material 3, a water retaining means 8 is provided on the side of the raw grass mat 6 on which the soil 9 is embanked, and thereafter the grid material 3 is provided. Since the soil 9 is embanked on 3, the water is supplied to the raw turf mat 6 sufficiently even on a steeply sloping ground or retaining wall, and there is no danger of dying early, and the desired greening is improved. Can be achieved.

In the above method, the grid material 3
The anchor pin 5, the raw grass mat 6, the fixture 7, and the water retaining means 8 have the same material and configuration as those of the first embodiment.

In the present embodiment, the order of the procedure for fixing the raw turf mat 6 on the front portion 3a of the grid material 3 and the procedure for embedding the soil 9 on the laid portion 3A of the grid material 3 is necessary. However, from the viewpoint of making the flow of the construction smoother, after the grid material 3 is fixed to the ground of the construction site 2, first, the raw grass mat 6 precedes the front part 3a. It is desirable to be fixed.

[0046]

Since the grid material and the retaining unit used in the present invention are lightweight, they can be easily and easily transported to a work site where a retaining wall is constructed or carried during the construction work. Also, by sticking the raw turf mat to these grid members and earth retaining units, it is possible to achieve greening already from the beginning of construction, and the landscape can be quickly and preferably improved. In addition, since the rhizomes of the already-grown lawn can greatly enhance the function of retaining soil, the construction process can be simplified and an inexpensive reinforced earth method can be provided. At the same time, it is not necessary to use an auxiliary material such as a net with a small mesh or a coconut sheet with a large weight as in the related art, so that a tree having a large stem can be introduced. Further, compared with the conventional case where sandbags are stacked, the construction work is remarkably improved. In other words, even on a steeply sloping ground or retaining wall, since it is released from the heavy work of stacking the sandbags, the formation can be performed easily and lightly. In addition, by adopting a water retention means so that water can be sufficiently supplied to the raw turf mat, early death can be prevented, and desired greening can be achieved satisfactorily. Furthermore,
The embankment unit has a shape having a part to be grounded to the ground and a front part, so that the embankment unit can be more stably grounded, so that a desired steep embankment is provided. Can be successfully achieved.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view showing a first embodiment of a construction example of a reinforced earth method according to the present invention.

FIG. 2 is an explanatory overview of components used in the reinforced earth method.

FIG. 3 is an explanatory diagram of an operation of the reinforced earth method.

FIG. 4 is an explanatory perspective view showing a second embodiment of a construction example of the reinforced earth method according to the present invention.

FIG. 5 is an explanatory view of a conventional reinforced earth method.

FIG. 6 is an explanatory view of another conventional reinforced earth method.

[Explanation of symbols]

1: Sloped ground, 2: Retaining wall construction point, 3: Grid material,
3 ... laying part, 3B ... retract part, 3a ... front part,
3b: covering portion, 4: earth retaining unit, 41: grounding portion, 42: front portion, 6: raw grass mat, 8: water retention means,
9 ... Soil.

[Procedure amendment]

[Submission date] September 11, 1998 (1998.9.1)
1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

The raw turf mat described in each of the above claims is usually 30 cm × 37.1 cm or 15 cm ×
With a standard of 37.1 cm, for example, Korai turf and wild turf Zoisha turf as native Japanese species can be adopted.
A lawn of 5 to 1.0 mx 1.0 to 5.0 m, which is wound into a roll and is configured to be spread on site, is also employed. As the roll-shaped lawn, a Zoisha-type or exotic Kentucky bluegrass or bentgrass-type lawn is used. In particular, when a lawn in the form of a roll is adopted, the number of fixing portions of the lawn to the grid material and the earth retaining unit can be reduced, the workability is good, and the standard of the lawn mat is large as described above. As a result, the soil retaining effect is more effectively exhibited, which is advantageous.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0032

[Correction method] Change

[Correction contents]

The grass turf mat 6 employed in each of the above embodiments is usually 30 cm × 37.1 cm, or 15 cm.
A standard of cm × 37.1 cm, for example, Korai turf as a native species of Japan and Zoisha turf of wild turf can be adopted. Also, as shown in the figure, 0.5 to 1.0 m × 1.0 to
A rolled lawn mat, which is wound in a roll and is configured to be spread on site at a standard of 5.0 m, is also adopted. As the roll-shaped raw grass mat, a Zoisha type or an exotic Kentucky Bluegrass or bent grass type raw grass mat is adopted. In particular, if the roll-shaped raw turf mat shown in the figure is adopted, the fixed portion of the raw turf mat to the grid material and the retaining unit can be reduced, the workability is good, and the standard of the raw turf mat is As described above, since it is large, the number of seams is small, and as a result, the earth retaining effect is more effectively exhibited, which is advantageous.

Claims (4)

[Claims] In a reinforced earth method using a grid material, a lawn turf mat is directly adhered to the inside of the wrapping portion while leaving a part of the grid material laid on a construction site of a retaining wall as a wrapping portion, The soil is embanked on the grid material and compacted, and then the entrained portion of the grid material is expanded on the front of the embankment, and the remaining portion is expanded to the upper side. Reinforced earth method characterized by the fact that the embankment is sequentially filled. 2. A reinforced earth construction method using a grid material, wherein a net-shaped reinforced embankment unit for reinforcing embankment is disposed on the retaining wall construction side, and then the raw turf is placed directly inside the reinforced embankment embankment unit. A reinforced earth method in which a mat is attached, and then the soil is laid on the grid material and compacted, and thereafter the above procedure is repeated to fill the upper tier one by one. 3. A grass turf mat is directly attached to the inside of the soil retaining unit, and a water retaining means is provided on a side of the turf soil on which the soil is buried, and then the soil is laid on a grid material. The reinforced earth method according to claim 2. 4. The earth retaining unit includes a ground net portion grounded to the ground, and a front net portion connected to the ground net portion, wherein the lawn is attached to the inside of the front net. Claim 2 or Claim 3
The reinforced earth method according to any one of the above.