JP2013147791A - Reinforcing soil wall construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing soil wall construction method not only capable of reducing a construction cost by shortening a back distance of a retaining wall but also capable of securing a temporary greening section until plants grow naturally.SOLUTION: A wall surface material 3 is formed in such a manner that a plurality of belt members 5 assuming an approximately belt-like shape are joined at predetermined intervals, and made of a geocell 3 capable of forming a sediment restraining portion 7 for restraining sediment, by making unjoined portions of the belt members 5 separated from each other. A vegetation mat 20 is fixed to the unjoined portions of the plurality of belt members 5 positioned in the front row, in a state in which a front side of the vegetation mat 20 is inclined to be directed upward, and a space 23 surrounded by the belt members 5 and the vegetation mat 20 is formed on the front surface of the geocell 3, and filled with the sediment.

Description

  The present invention relates to a reinforced earth wall construction method in which wall surfaces are laminated to form a retaining wall and the earth wall is reinforced by the retaining wall, and more particularly to a reinforced earth wall construction method suitable for wall greening.

  Conventionally, a reinforced earth wall construction method has been used in which a retaining wall is formed and reinforced on a dirt wall facing a road or a site. In this reinforced earth wall construction method, an anchor hole is drilled in embankment or cut, concrete is injected into this anchor hole, the tip of the tensile material is inserted into the concrete, and the upper end portion is led out from the anchor hole. The pressure receiving plate formed of a concrete plate is fixed (for example, see Patent Document 1).

Japanese Patent No. 3556607 (pages 2, 3 and 1, 4 and 5)

  However, in the construction method described in Patent Document 1, since the construction is performed using the heavy concrete pressure receiving plate, the pressure receiving plate is used in order to ensure sufficient strength for restraining the heavy wall surface material. However, it is necessary to increase the back surface distance of the retaining wall and increase the construction cost.

  Moreover, when using concrete, since the soil used as a greening part is not sufficiently exposed due to the thickness of the pressure receiving plate, there is a problem that the greening of the wall surface cannot be performed sufficiently and the appearance is poor. In particular, it takes a long period of about several years for plants that invade naturally to grow naturally, and wall greening is desired during that period.

  The present invention has been made paying attention to such problems, and it is possible not only to reduce the back distance of the retaining wall to reduce the construction cost, but also to temporarily plant the green part until the plant grows naturally. The purpose is to provide a reinforced earth wall construction method capable of ensuring the above.

In order to solve the above problems, the reinforced earth wall construction method of the present invention is:
Reinforced earth wall construction method in which wall materials are laminated to form a retaining wall, and the earth wall is reinforced by the retaining wall,
The wall surface material is formed by joining a plurality of substantially band-shaped band members at predetermined intervals, and a geocell capable of forming a sand-and-sand restraining portion for restraining the earth and sand by separating the non-bonded portions of the band members from each other. The vegetation mat is fixed in a state where the vegetation mat is inclined so that the surface side of the vegetation mat faces upward, at a non-joined portion of the plurality of band members positioned in the front row, and the band member and It is characterized by forming a space surrounded by vegetation mats and embedding earth and sand in this space.
According to this feature, since the earth and sand are restrained by a geocell formed of a plurality of substantially strip-shaped strip members, the back surface distance of the retaining wall can be reduced, thereby reducing the construction cost of the retaining wall. Can be reduced. In addition, since the geocell is configured by the band member, the structure meanders in the front row of the band member. Therefore, by fixing the vegetation mat to the non-joined part of the plurality of band members, A space surrounded by the member and the vegetation mat can be formed. By embedding earth and sand in this space and planting plants that grow in a short time on a vegetation mat, a temporary greening part can be secured until the plants grow on the earth in the earth and sand restraint part. Furthermore, since the plant roots extend almost vertically downward, the plant surface is inclined so that the surface side of the vegetation mat faces upward, so that the plant roots are easy to grow downward and sunlight is sufficient. It will come into contact with the surface of the vegetation mat and the plant will grow up in a short period of time.

The reinforced earth wall construction method of the present invention is
Between the stacked geocells, sandwiching the front side of the geogrid formed of a substantially lattice-shaped sheet member, and burying the rear side of the geogrid in the embankment to form the retaining wall It is a feature.
According to this feature, the retaining wall is used to constrain the earth and sand with a geocell formed of a plurality of substantially band-shaped strip members, and to constrain the stacked state of the geocell using the load of the embankment by the geogrid. The back surface distance can be reduced, and the construction cost of the retaining wall can be reduced.

The reinforced earth wall construction method of the present invention is
A step portion is formed between the vegetation mat in the upper position and the vegetation mat in the lower position.
According to this feature, the step portion between the upper and lower vegetation mats can suppress the flow rate of rainwater, and can prevent the earth and sand sedimented in the space surrounded by the belt member and the vegetation mat from being rapidly discharged.

The reinforced earth wall construction method of the present invention is
It is characterized in that at least the upper end portion of the wire mesh is fixed to the non-joined portion of the band member in a state where the surface of the vegetation mat is covered with the wire mesh.
According to this feature, while holding the vegetation mat in a state in which sunlight hits the vegetation mat by a wire mesh, a sufficient amount of earth and sand can be embanked in the space surrounded by the joining portion of the belt member and the vegetation mat. In addition, the wire netting corrodes with the vegetation mat as time passes and naturally returns, so that the temporary greening portion disappears at the time when the plant in the sediment restraint portion has completely transitioned.

The reinforced earth wall construction method of the present invention is
The upper end portion of the wire mesh is fixed to a non-joined portion of the band member by staples, and the lower end portion of the wire mesh is fixed to the embankment in the earth and sand restraining portion at a lower position by a pin.
According to this feature, the installation work of the wire mesh can be easily performed, and the staples and the pins are corroded with the passage of time so as to naturally return.

The reinforced earth wall construction method of the present invention is
The upper end portion of the wire mesh is fixed to a non-joined portion of the band member by a bar-like anchor whose upper portion is bent, and the lower portion of the anchor is inserted into the embankment in the earth and sand restraining portion at a lower position.
According to this feature, the installation work of the wire mesh can be easily performed, and the upper end portion to the lower end portion of the wire mesh is pressed by the anchor, and the vegetation mat is held together with the wire mesh.

3 is a cross-sectional view showing a retaining wall in Example 1. FIG. It is a perspective view which shows a geocell. It is a perspective view which shows the state which laminated | stacked the geocell. It is sectional drawing which shows the state in which the turf plant was vegetated. It is sectional drawing which shows the state which the native plant changed. It is an expanded sectional view which shows the unevenness | corrugation and through-hole which were provided in the strip | belt member. It is sectional drawing which shows the state in which the turf plant in Example 2 was vegetated. It is a perspective view which shows the geocell in Example 3. FIG. It is sectional drawing which shows the state in which the turf plant in Example 4 was vegetated. It is sectional drawing which shows the state in which the turf plant in Example 5 was vegetated.

  EMBODIMENT OF THE INVENTION The form for implementing the reinforced earth wall method which concerns on this invention is demonstrated below based on an Example.

  The reinforced earth wall construction method according to Example 1 will be described with reference to FIGS. 1, 4, and 5 will be described as the front side (front side) of the retaining wall, and the lower left side of FIGS. 2 and 3 will be described as the front side (front side) of the retaining wall.

  Reference numeral 1 in FIG. 1 denotes a retaining wall to which the present invention is applied. The retaining wall 1 is formed so as to cover the entire front surface of the earth wall 2 facing a road or a site. The retaining wall 1 is constructed using a geocell 3 as a wall material of the present invention that forms a wall surface of the retaining wall 1 and a geogrid 4 as a reinforcing material.

  Furthermore, a vegetation mat 20 and a wire mesh 21 are installed on the front surface (front surface) of the geocell 3. The vegetation mat 20 is provided with thin cotton and plant seeds on the surface of the straw formed in the shape of a saddle. This plant species is a seed of turf plants 14 such as turf that grows in a short period of time so that after completion of construction, the turf plants 14 grow on the surface of the vegetation mat 20 in a short period (about 2 to 3 months). It has become.

  As shown in FIG. 2, the geocell 3 is composed of a plurality of substantially band-shaped band members 5 formed of a flexible material such as synthetic resin. In the present embodiment, six belt members 5 are provided in the front-rear direction, these belt members 5 are arranged so that the width direction thereof is perpendicular, and in a state where the belt members 5 are arranged in a stacked manner, They are joined at predetermined intervals in the longitudinal direction. This joining portion is a welded portion 6 (crimped portion) that is welded (or crimped) while applying pressure.

  Further, when the geocell 3 is expanded in the front-rear direction, the non-bonded portions of the band members 5 are separated from each other, so that the earth-and-sand restraining portion 7 that restrains the earth and sand can be formed. This earth and sand restraint part 7 is arranged in a staggered or honeycomb shape. In this earth and sand restraint part 7, earth and sand are put and compacted by a rolling process (see FIG. 3), and can be formed into a thick plate-like layered structure by geocell 3 and earth and sand.

  As shown in FIG. 2, a bank with a predetermined slope is formed on the front surface of the geocell 3, and a vegetation mat 20 and a wire net 21 are installed on the slope of the bank. Thus, the vegetation mat 20 is arranged so as to be sandwiched between the wire mesh 21 and the front row of the geocell 3, and the upper end portion of the wire mesh 21 is covered with the geocell 3 with the surface of the vegetation mat 20 covered with the wire mesh 21. The plurality of belt members 5 located in the foremost row are fixed to the non-joined portions by the staples 22.

  Further, the vegetation mat 20 and the wire mesh 21 are disposed on the inclined surface of the embankment so that the surface side of the vegetation mat 20 and the wire mesh 21 is inclined so as to face upward. And the lower end part of the vegetation mat 20 and the wire mesh 21 is fixed to the embankment in the earth and sand restraining part 7 of a downward position with the pin 24. FIG. The pin 24 is U-shaped and is inserted from above into the embankment in the earth and sand restraining portion 7 at a lower position in a state of being inserted through the mesh of the wire net 21. The arrangement position of the pin 24 corresponds to the arrangement position of the staple 22. Thus, by using the staples 22 and the pins 24, the installation work of the wire mesh 21 can be easily performed, and the staples 22 and the pins 24 corrode with time and return naturally.

  In this way, the vegetation mat 20 and the wire mesh 21 are fixed to the front side of the geocell 3, so that the earth and sand are filled in the space 23 surrounded by the vegetation mat 20 and the belt member 5 on the front side of the geocell 3. And until the turf plant 14 which grows in a short period of time on the vegetation mat 20 in contact with the embankment is vegetated, the native plant 11 (local species), which will be described later, transitions to the earth and sand restraint part 7 (see FIG. 5), the turf plant 14 can secure a temporary greening portion (see FIG. 4).

  Further, the root 15 of the turf plant 14 extends substantially vertically downward, and is inclined so that the surface side of the vegetation mat 20 faces upward, so that the root 15 of the turf plant 14 is downward. It becomes easy to grow and sunlight is sufficiently applied to the surface of the vegetation mat 20 so that the turf plant 14 grows in a short period of time.

  In addition, by using the wire mesh 21, the vegetation mat 20 can be held in a state where sunlight strikes the vegetation mat 20 through the mesh of the wire mesh 21. Further, the upper end portion of the wire mesh 21 is fixed to the non-joined portion of the band member 5 by the staple 22 so that a sufficient amount of earth and sand can be filled in the space 23 surrounded by the joint portion of the band member 5 and the vegetation mat 20. It becomes like this.

  In addition, since the belt member 5 is formed of a material such as synthetic resin, there is a risk that rainwater in the rain may rapidly flow on the surface of the belt member 5. Since the earth and sand embanked in the mat 20, the wire mesh 21 and the space 23 are provided, the surface of the band member 5 is not exposed, the flow rate of rainwater is suppressed, and the earth and sand embanked in the geocell 3 is immediately discharged. Can be prevented.

  Moreover, when the vegetation mat 20 and the wire net 21 corrode with time and return spontaneously, the temporary greening portion disappears when the native plant 11 (local species) completely transitions ( (See FIG. 5). In this embodiment, straw turf is used as the vegetation mat 20, but the vegetation mat 20 is not limited to straw turf. For example, a palm mat using coconut fiber or biodegradable using biodegradable plastic yarn. A mat or the like may be used.

  A plurality of small through-holes 8 are formed in the belt member 5 of the geocell 3, and the mutual sediment restraint portions 7 communicate with each other through the through-holes 8. In addition, since the through-hole 8 is not formed in the strip | belt member 5 located in the front row of the geocell 3, and the earth and sand in the earth-and-sand restraint part 7 do not flow out, it is natural plant 11 (conventional The earth and sand in the geocell 3 where the seeds transition and the temporary greening part are distinguished from each other, and the greening is possible over a long period without mutual interference.

  In addition, the earth and sand embanked in the geocell 3 is subjected to a rolling compaction process, and the earth and sand is embanked at a high density, and is surrounded by a band member 5 and a vegetation mat 20 formed on the front surface of the geocell 3. The earth and sand in 23 is filled with a density lower than the earth and sand in the geocell 3 at least. According to this, the strength of the earth and sand embanked in the geocell 3 is increased by the rolling process, and the outflow of the earth and sand is prevented, and the earth and sand in the space 23 is embanked in the geocell 3 located below as time passes. It is possible to fertilize the earth and sand in the geocell 3 where the native plant 11 (native species) transitions.

  As shown in FIG. 3, when construction is performed, the geocell 3 is laminated together with the earth and sand while the earth and sand are put into the earth and sand restraining portion 7 of the geocell 3. In addition, when putting earth and sand into the earth and sand restraint part 7, the seed of the same native plant 11 as what originally inhabits a construction site is mixed. In addition, you may make it mix the seed of the same native plant 11 also in the earth and sand embanked in the space 23 enclosed by the vegetation mat 20 and the strip | belt member 5. FIG. Further, the stacked geocells 3 are arranged such that at least a part of the sediment control part 7 of the geocell 3 at the upper position is covered with the sediment control part 7 of the geocell 3 at the lower position. The retaining wall 1 is formed.

  Further, since the vegetation mat 20 and the wire mesh 21 are installed for each geocell 3, the step portion 10 that forms a horizontal plane between the vegetation mat 20 and the wire mesh 21 at the upper position and the vegetation mat 20 and the wire mesh 21 at the lower position. Is formed. By doing in this way, the rainwater flowing down the surfaces of the vegetation mat 20 and the wire mesh 21 temporarily stops at the step portion 10, and the flow rate of the rainwater is suppressed, so that it is surrounded by the belt member 5 and the vegetation mat 20. As a result, it is possible to prevent the earth and sand buried in the space 23 from flowing out immediately.

  As shown in FIG. 1, in the present embodiment, a plurality of earth and sand restraint portions 7 are formed in the front-rear direction of each geocell 3, and the earth and sand restraint portions 7 in the second row from the front row of the geocell 3 in the lower position A part of the area of the soil restraint portion 7 in the front row of the geocell 3 at the position is covered. In this way, the geocells 3 are connected to each other via the earth and sand in the earth and sand restraining portion 7 of each geocell 3, and the strength of the retaining wall 1 can be improved. Furthermore, due to the difference between the two, the earth and sand in the space 23 surrounded by the belt member 5 and the vegetation mat 20 can easily flow on the earth and sand surface embanked in the geocell 3 positioned below as time elapses.

  In addition, since the seeds of the same native plant 11 originally inhabiting the construction site are mixed in the earth and sand restraint portion 7 of the geocell 3, the native plant 11 seems to grow naturally in the earth and sand restraint portion 7 of the geocell 3. become. After the construction, when a predetermined period has elapsed, the roots 12 of the native plant 11 grown in the earth and sand restraint portion 7 of the geocell 3 enter the through-holes 8 of the band member 5 (see FIG. 6) and become entangled with the band member 5. become. And the root 12 of the native plant 11 entangled with this belt member 5 extends deeply into the soil.

  Moreover, as shown in FIG. 6, the embossing is given to the surface of the strip | belt member 5 of the geocell 3, and the fine uneven | corrugated | grooved part 13 (emboss) is formed. The minute uneven portions 13 can improve the frictional force between the earth and sand in the earth and sand restraining portion 7 and the geocell 3 and improve the strength of the retaining wall 1. Furthermore, earth and sand enter the through hole 8 of the band member 5, and this through hole 8 improves the frictional force between the earth and sand in the earth and sand restraining part 7 and the geocell 3, and the strength of the retaining wall 1. Can be improved. In addition, the frictional force between the earth and sand in the space 23 and the surface of the geocell 3 can be improved to prevent the earth and sand from flowing out immediately.

  Thus, since the wall surface material of the retaining wall 1 is the geocell 3 formed of a plurality of substantially band-shaped band members 5, the wall surface material is reduced in weight and can be easily transported, and the wall surface material is lightweight. Even if it becomes the geocell 3, it becomes possible to keep the strength of the retaining wall 1 sufficiently by restraining the earth and sand to the earth and sand restraining part 7 of the geocell 3 and restrain the embankment 9 by the lightened geocell 3. In order to restrain the stacked state of the geocell 3 using the load of the embankment 9 by the geogrid 4 while forming the wall surface, the back surface distance L (see FIG. 1) from the wall surface of the retaining wall 1 to the earth wall 2 is set. It becomes possible to make it small, and the construction cost of the retaining wall 1 can be reduced. In addition, since the back surface distance L of the retaining wall 1 is small, it is not necessary to dig deeply in front of the earth wall 2 which is the formation object of the retaining wall 1, and a construction period can also be shortened. In addition, since the construction can be performed by sandwiching the front side of the geogrid 4 formed of a sheet member having a substantially lattice shape between the stacked geocells 3, the connection work between the geocell 3 and the geogrid 4 is performed. It becomes possible to carry out without using a separate connecting member such as a connecting anchor, and the construction work is simplified.

  Next, a reinforced earth wall construction method according to Example 2 will be described with reference to FIG. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted.

  As shown in FIG. 7, the vegetation mat 20 ′ is configured such that its upper edge is higher than the height of the geocell 3. The upper part of the vegetation mat 20 ′ is bent so as to cover the earth and sand restraint part 7 of the geocell 3 and the upper side of the space 23 on the front side of the geocell 3, that is, the step part 10 forming a horizontal plane.

  According to this, since the earth and sand restraint part 7 and the space 23 where the earth and sand are embanked are covered with the vegetation mat 20 ', the earth and sand part of the earth and sand restraint part 7 and the space 23 is not exposed, and the temporary appearance is maintained. A greening part can be secured. Further, since the vegetation mat 20 ′ is configured to be higher than the height of the geocell 3, the vegetation mat 20 ′ can suppress rainwater flowing in the horizontal plane of the stepped portion 10, and can prevent the sediment from flowing out quickly.

  Next, a reinforced earth wall construction method according to Example 3 will be described with reference to FIG. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted.

  As shown in FIG. 8, unlike the first embodiment, the geocell 3 can be installed in the opposite direction. In this case, the through hole 8 is installed so as to face the front side of the geocell 3.

  According to the third embodiment, the turf plant 14 and the roots 12 and 15 of the native plant 11 vegetated in the vegetation mat 20 and the space 23 extend through the through holes 8 to the earth and sand restraint part 7 in the geocell 3, The growth of the plant 14 and the native plant 11 can be promoted.

  Next, a reinforced earth wall construction method according to Example 4 will be described with reference to FIG. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted.

  As shown in FIG. 9, a lath anchor 25 is used when the wire mesh 21 is fixed in the fourth embodiment. The lath anchor 25 has a bar shape with an upper portion bent, and the angle of the bent portion is set in advance according to the inclination angle of the inclined surface of the embankment on the front surface of the geocell 3.

  When the wire mesh 21 is fixed, the upper end of the wire mesh 21 is placed in the front row of the geocell 3 in a state where the vegetation mat 20 is installed on the inclined surface of the embankment and the surface of the vegetation mat 20 is covered with the wire mesh 21. It is installed so as to be in contact with the non-joined portion of the plurality of belt members 5 positioned, and the wire mesh 21 and the belt member 5 are sandwiched between the bent portions of the upper portion of the lath anchor 25, and the lower portion of the lath anchor 25 is placed in the lower position of the geocell 3 It is made to insert in the embankment in the earth and sand restraint part 7.

  As described above, in the first embodiment, the wire mesh 21 is fixed by the two types of members of the staple 22 and the pin 24. However, in the present embodiment 4, the wire mesh 21 can be fixed only by the lath anchor 25, The installation work of the wire mesh 21 can be easily performed, and the upper end portion to the lower end portion of the wire mesh 21 is pressed by the lath anchor 25, and the vegetation mat 20 is held together with the wire mesh 21.

  Next, a reinforced earth wall construction method according to Example 5 will be described with reference to FIG. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted.

  As shown in FIG. 10, unlike the first embodiment, the retaining wall 1 of the fifth embodiment is not formed with the stepped portion 10 (see FIG. 4), and the vegetation mat 20 installed for each geocell 3 and Wire meshes 21 are arranged so as to be flush with each other. By doing in this way, the inclination angle of the inclined surface of the embankment becomes gentle, and the surface side of the vegetation mat 20 and the wire net 21 is arranged in an inclined state so as to face upward from the first embodiment. . Therefore, the roots 15 of the turf plant 14 are more likely to grow downward, and the sunlight hits the surface of the vegetation mat 20 more.

  Moreover, in Example 5, the upper end part of the wire mesh 21 is in a state where the surface of the vegetation mat 20 is covered with the wire mesh 21 by the staple 22 (see FIG. 2) at the non-joined portion of the band member 5 in the front row of the geocell 3. At the same time, the lower ends of the vegetation mat 20 and the wire mesh 21 are fixed by pins 24 inserted from above so as to sandwich the non-joined portion of the belt member 5 of the geocell 3 at the lower position.

  Thus, since the vegetation mat 20 and the wire mesh 21 are fixed to the band member 5 of the geocell 3 at the upper end and the lower end thereof, the vegetation mat 20 and the wire mesh 21 are firmly connected to the geocell 3. Further, the vegetation mat 20 and the wire mesh 21 installed for each geocell 3 are arranged so as to be flush with each other, so that the geocell 3 is completely concealed and the appearance of the retaining wall 1 is improved. Can do.

  In the fifth embodiment, the vegetation mat 20 and the wire mesh 21 are arranged for each geocell 3, but not limited to this, the vertical width of the vegetation mat 20 and the wire mesh 21 is formed larger than the height of the geocell 3. Then, the vegetation mat 20 and the wire mesh 21 having a size covering the plurality of stages of geocells 3 may be used, or the vegetation mat 20 and the wire mesh 21 having a size covering all the stages of the geocells 3 forming the retaining wall 1. May be used.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, by putting the earth and sand collected at the construction site into the earth and sand restraint part 7 of the geocell 3, the native species of the plants 11 that inhabit the earth and sand are within the earth and sand restraint part 7 of the geocell 3. Although the seeds of the plant 11 that grow naturally are not limited to the native species, they may be other seeds, especially plants that are entangled with the front side of the geocell 3 such as cocoons. There may be.

  Moreover, in the said Example, although the geogrid 4 as a reinforcing material is used, the geogrid 4 does not necessarily need to be used, for example, the retaining wall 1 is formed only by the geocell 3, the vegetation mat 20, and the wire mesh 21. You may make it construct.

1 Retaining wall 2 Earth wall 3 Geocell (wall material)
4 Geogrid (reinforcing material)
5 Band member 6 Welding part 7 Sediment restraint part 8 Through hole 9 Filling 10 Step part 11 Native plant 12 Root 13 Concavity and convexity part 14 Turf plant 15 Root 20, 20 'Vegetation mat 21 Wire net 22 Staple 23 Space 24 Pin 25 Las anchor L Back distance

Claims (6)

Reinforced earth wall construction method in which wall materials are laminated to form a retaining wall, and the earth wall is reinforced by the retaining wall,
The wall surface material is formed by joining a plurality of substantially band-shaped band members at predetermined intervals, and a geocell capable of forming a sand-and-sand restraining portion for restraining the earth and sand by separating the non-bonded portions of the band members from each other. The vegetation mat is fixed in a state where the vegetation mat is inclined so that the surface side of the vegetation mat faces upward, at a non-joined portion of the plurality of band members positioned in the front row, and the band member and the front surface of the geocell A reinforced earth wall construction method that forms a space surrounded by vegetation mats and fills the space with earth and sand.   Between the stacked geocells, sandwiching the front side of the geogrid formed of a substantially lattice-shaped sheet member, and burying the rear side of the geogrid in the embankment to form the retaining wall The reinforced earth wall construction method according to claim 1, wherein   The reinforced soil wall construction method according to claim 1 or 2, wherein a step portion is formed between the vegetation mat at an upper position and the vegetation mat at a lower position.   The reinforcing earth wall method according to any one of claims 1 to 3, wherein at least an upper end portion of the wire mesh is fixed to a non-joined portion of the belt member in a state where the surface of the vegetation mat is covered with a wire mesh.   The upper end portion of the wire mesh is fixed to a non-joined portion of the band member by stapling, and the lower end portion of the wire mesh is fixed to the embankment in the earth and sand restraining portion at a lower position by a pin. Reinforced earth wall construction method.   The upper end of the wire mesh is fixed to a non-joined portion of the belt member by a bar-shaped anchor whose upper part is bent, and the lower part of the anchor is inserted into the embankment in the earth and sand restraining part at a lower position. 4. The reinforced earth wall construction method according to 4.

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