JPH11172677A - Reinforced banking wall method using channel type wall surface material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method, which is executed easily, in which various vegetation is carried out and which can construct a stable reinforced banking wall. SOLUTION: Channel type wall surface materials 1 consisting of plastics or a steel material are arranged to sections as banking walls, the end sections of reinforcing materials 2 laid at the rears of the channel type wall surface materials 1 are connected to the channel type wall surface materials 1, the channel type wall surface materials 1 are filled with soil 3, banking layers in layer thickness Δh approximately corresponding to the height of the wall surface materials 1 are banked up at the rears of the channel type wall surface materials 1, and a banking in height (h) is prepared by repeating these processes by the execution of woks at each stage. The channel type wall surface materials 1 are manufactured in a stable reinforced banking wall W by stacking the wall surface materials 1 in a tiered stand shape, and plants 4 such as shrubs can be vegetated in soil 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced embankment wall method for reinforcing an embankment wall so that an embankment having a steep wall surface can be formed.

[0002]

2. Description of the Related Art In earthworks such as mountainous areas, roads near a city, and a river embankment, the work is carried out while maintaining a balance between cutting and embankment in the planned area. It is necessary to make the embankment wall (slope) gentle to some extent. However, if the slope is reduced, more land will be required, and the amount of embankment material required for the construction will also increase. Therefore, even if the land area is the same, the available area of the embankment top surface is increased as much as possible, or the land is effectively used to save the land area for creating the embankment having the required top surface area, or the embankment material can be saved. In recent years, there has been a method of reinforcing embankment walls that makes the embankment walls steep (slope near vertical) by increasing the strength of the embankment walls against sliding failure using reinforcing materials and improving its stability. The examples applied are increasing. And as a method for forming such a steep reinforced embankment wall, conventionally, for example, a construction method of forming a reinforced embankment wall by stacking sandbags made of locally generated soil along the embankment wall,
2. Description of the Related Art A construction method of forming a nearly vertical reinforcing embankment wall by stacking a panel wall made of a concrete block or a metal plate having an anchor buried in an embankment along the embankment wall is employed.

[0003]

However, among the above-mentioned prior arts, in the reinforced embankment wall construction method in which sandbags are piled up to form a wall material, a large amount of sandbags must be manufactured by bagging soil generated locally. In addition, the production work and the work of transporting and stacking the completed sandbags require a large amount of labor. In addition, the wall material made of sandbags is easily deformed because it is made of bagged soil material.If the soil inside the sandbags is not compacted enough to be deformed when the sandbags are stacked, the embankment wall will be built up with the embankment. However, there is a problem that a local deformation occurs, and a large deformation occurs even after the formation is completed. In addition, reinforced vegetation walls made of sandbags can be used for vegetation such as herbs, but vegetation of relatively tall shrubs is not possible.

In addition, in the construction of a reinforced embankment wall using a concrete block, since the weight of the concrete block is large, it is inconvenient to handle it during transportation or on-site stacking work. In addition, the ability to follow the consolidation deformation of the embankment during the construction process is poor, and the deviation and inclination of the piled concrete blocks are conspicuous. It is pointed out that it is easy to give an inorganic visual impression to the whole.

[0005] The present invention has been made under the above circumstances, and its technical subjects are easy construction, various vegetation is possible, and a stable reinforced embankment wall is required. It is to provide a construction method that can be constructed.

[0006]

As a means for effectively solving the above-mentioned technical problems, a reinforced embankment wall construction method using a groove type wall material according to the present invention is constructed by stacking a plurality of stages along an embankment wall. In the construction of the reinforced embankment wall made of the wall material, the grooved wall material composed of the front slab, the back slab, and the bottom slab which are continuous with each other is arranged in a portion to be the embankment wall, and is surrounded by the front slab, the back slab, and the bottom slab. A series of steps of filling the soil into the filling space whose upper end is open, filling the embankment layer having a thickness substantially equivalent to the height of the grooved wall material in the embankment formation area behind the grooved wall material. , Is repeated in each stage of construction. That is, according to the method of the present invention, the grooved wall material exhibits a grooved shape composed of a front plate, a back plate, and a bottom plate that are continuous with each other, so that it is light in weight, and is therefore arranged (stacked) at a predetermined position during construction and transported. Handling at the time of is easy. After being arranged at the predetermined position, the filling space is filled with soil to increase the weight and to provide a stable reinforcing embankment wall.

[0007] As a more preferable configuration added in the present invention, a required number of water holes are opened in the bottom plate of the grooved wall material, and the second or more grooved wall material is provided in the lower grooved wall material. Is arranged at a position retracted from the lower grooved wall material so as to be supported across the upper end of the back plate and the upper end surface of the embankment layer behind the back plate. That is, in this case, the groove-shaped wall material is stacked in the shape of a platform, so that the stability is improved.
In addition, by doing so, the upper surface of the soil filled in the filling space of the grooved wall material at each stage is exposed, so that plants such as grasses and shrubs can be vegetated on the soil. Excess water in the soil in the filling space is discharged from a water hole of the bottom plate.

[0008] As a further preferred configuration added in the present invention, the front plate of the channel-shaped wall material is formed in a porous or latticed shape. By doing so, it is possible to vegetate the soil in the filling space even from the front of the grooved wall material.

As another more preferable configuration added in the present invention, the back plate of the grooved wall material is formed in a shape inclined toward the front plate. In this way, not only is the grooved wall material more stabilized, but also when the embankment material sunk behind it is rolled, it is easy to sufficiently roll it to the vicinity of the boundary between the grooved wall material and the back plate. .

[0010] As a further preferred configuration added in the present invention, a channel-shaped wall material is fixed to an end of a reinforcing material embedded in the embankment layer. In other words, the reinforcing material is buried in the embankment layer and holds each channel-shaped wall material by a large frictional force with the embankment layer. Therefore, a material made of a material that has high tensile strength and is hardly corroded in the ground is suitably used. Is done. Specifically, for example, a net shape made of a polymer material,
A lattice-like material, or a net-like, perforated-plate-like, or rod-like material made of a metal having corrosion resistance is used.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embankment formed by a reinforced embankment wall method using a grooved wall material according to the present invention, wherein (a) is a front view, and (b) is a view of (a). FIG. 3 is a schematic vertical sectional view taken along the line II ′. In FIG. 1, reference numeral B denotes a foundation ground, and G denotes an embankment formed on the foundation ground B. The embankment G is formed at a height h by embedding embankment layers G _{1 to} G _n having a layer thickness Δh formed by processes such as spreading and compaction of embankment material in order from the bottom. On the embankment wall formed with a relatively steep slope, a number of grooves stacked in a staggered manner so that the vertical joint is located in the middle of the horizontal direction between the vertical joints above or below it (in a staggered pattern) A reinforcing embankment wall W made of the mold wall material 1 is constructed.

Each groove-shaped wall member 1 has a filling space 1S whose upper end is opened as described later, and the filling space 1S is filled with soil 3. The soil 3 exposed at the upper end of each grooved wall material 1 stacked in the shape of a platform is
Plants 4 such as herbs and shrubs are planted at appropriate intervals. Reinforcing members 2 are buried at predetermined intervals in the horizontal direction between the embankment layers G _{1 to} G _{n of the} layer thickness Δh constituting the embankment ground G, and are connected to each other in a state wound around each grooved wall material 1. ing. The reinforcing material 2 is made of, for example, a polymer material or a metal material having a required tensile strength and hardly corroding in the ground. In order to exert a large frictional force with the embankment material, in the case of the polymer material, a net-like material is used. Alternatively, in the case of a metal material, the shape is a perforated plate, a net, or a reinforcing rod.

Between the embankment G and the foundation ground B, sand, gravel, crushed stone, etc., having good drainage properties are spread in order to discharge underground water or infiltration water due to rainfall from the surrounding ground or the like. The drainage layer F is interposed. Also, in the portion of the foundation ground B on which the lowermost grooved wall materials 1 are laid, a rubble stone is laid as necessary or further discarded concrete is placed so as not to sink due to the weight of the reinforcing embankment wall W. Basic processing BG such as casting is performed.

As shown in FIG. 2, the groove type wall material 1 has a groove shape composed of a front plate 1a, a back plate 1b, and a bottom plate 1c which are continuous with each other, and is excellent in weather resistance and has high strength. It is made of corrosion-resistant metal such as steel or reinforced concrete. In particular, since a plastic or metal plate can be deformed to some extent following the consolidation deformation of the embankment G, the gap between adjacent grooved wall materials 1 and 1 hardly occurs. The soil 3 for wall stabilization and vegetation is filled in a filling space 1S which is surrounded by the front plate 1a, the back plate 1b and the bottom plate 1c and has an open upper end. The bottom plate 1c is provided with a required number of water holes 1d for discharging the excess permeated water of the soil 3.

[0015] Of the groove type wall material 1 illustrated in FIG.
In (a), the upper edges of the front slab 1a and the back slab 1b are connected via a connecting plate 1e arranged at a predetermined interval as required, thereby preventing deformation. When made of reinforced concrete, this connecting plate 1e is
And a part of the reinforcing bar exposed from the upper edge of the back plate 1b. The surface of the front plate 1a may be provided with an appropriate embossed pattern or coloring to improve the beauty of the wall surface. it can. (B) shows the connection plate 1e.
Are integrally formed. The front plate 1a is formed in the shape of a lattice or a perforated plate, whereby vegetation can be made from the front.

As the groove type wall material 1, various materials having different ratios of the height La and the depth Lb according to the gradient of the embankment wall are prepared. For example, as shown in FIG. In the case of the formation, one having a depth Lb relatively large with respect to the height La is used. However, also in the case of the steep embankment formation as shown in FIG. 1, the groove-shaped wall material 1 having a relatively large depth Lb with respect to the height La is used. This is advantageous for improving the stability of the wall surface.

When the channel-type wall material 1 is made of plastic, it is lightweight, so that the horizontal length Lc can be lengthened. However, when it is made of reinforced concrete, its specific gravity is large, so that transportation and on-site stacking work are taken into consideration. To reduce the horizontal length Lc to some extent.

The grooved wall material 1 shown in FIG.
a is almost vertical, while the back plate 1b is the front plate 1a
It is formed in a shape inclined so as to fall to the side. When such a grooved wall material 1 is used, the back plate 1b of the grooved wall material 1 is unlikely to hinder rolling when the embankment material erected behind is compacted by a compaction roller or the like. Rolling can be easily performed sufficiently near the plate 1b. In addition, since the depth of the bottom slab 1c is larger than the depth of the upper end, the center of gravity is low, and as shown in FIG.

Referring to FIGS. 6 to 15, the process of forming the embankment G having the reinforced embankment wall W shown in FIG. 1 by the reinforced embankment wall method using the grooved wall material according to the present invention. Will be described step by step.

First, as shown in FIG. 6, a land to be laid on the embankment is formed to form a substantially horizontal foundation ground B. On this foundation ground B, water flowing from the surrounding ground can be quickly drained. If necessary, a drainage layer F having an appropriate thickness is formed by laying a material having a good drainage property such as sand, gravel or crushed stone. In the case where the portion of the foundation ground B, which is the lower end of the reinforced embankment wall W shown in FIG. 1, is insufficient in rigidity, rubble stone is laid on this portion and further discarded concrete is poured thereon. The basic processing BG such as performing is performed.

Next, as shown in FIG. 7, it is flexible from the foundation ground B (the drainage layer F and the foundation treatment BG) to the ground B 'on the front side of the site where the embankment is to be formed. A net-shaped or lattice-shaped first-stage reinforcing material 2 is laid. This reinforcing material 2 is provided at the end 2a on the foundation ground B (drainage layer F) side,
If necessary, it is fixed to the foundation ground B by the anchor 21 which is driven at a predetermined interval.

Next, as shown in FIG. 8, a plurality of grooved wall materials 1 of the first stage are arranged in a row in a direction orthogonal to the cross section of the figure along the lower end of the reinforcing embankment wall W of FIG. It is set up so that it is laid side by side. That is, in the case of the example shown in the figure, the grooved wall material 1 is disposed on the reinforcing material 2 on the base treatment BG. The groove type wall material 1 is lightweight because it exhibits a hollow groove type.
In particular, plastic ones are extremely lightweight,
This installation work can be easily performed with little labor.

Filling space 1S for each grooved wall material 1 installed
Is filled with soil 3 such as locally generated soil as shown in FIG. This results in a heavy wall body, and the installation state is stabilized. Since the soil 3 is also used for vegetation, if the locally generated soil has a soil quality unsuitable for vegetation, fill it with a soil suitable for vegetation such as mulch as necessary.
Alternatively, it is mixed with the soil generated locally and filled.

When the filling of the soil 3 into the filling space 1S of each grooved wall material 1 is completed, the end 2b of the reinforcing material 2 on the ground B 'on the front side of the land to be embanked is shown in FIG. As shown, it is folded back so as to be wound around the grooved wall material 1 from above, and is superimposed on a portion of the reinforcing material 2 on the foundation ground B (drainage layer F). It is fixed by the required number of anchors 22 that have been driven.

Next, as shown in FIG. 11, an embankment material G 'having an appropriate spreading thickness of, for example, about 30 cm is provided in an area on the back side of the grooved wall material 1 (on the drainage layer F in the illustrated example). Are spread out, spread out with a bulldozer or the like, and then compacted by a compacting machine such as a vibration roller. Then, by repeating such a spreading, spreading, and compacting operation of the embankment material G 'a required number of times, the upper end height of the grooved wall material 1 substantially reaches the first stage as shown in FIG. forming the embankment layer G ₁ of the lowermost layer thickness Delta] h. This also allows the reinforcement 2
There will be an embedded state between the foundation ground B (drainage layer F) of the embankment layer G _1, given a frictional force.

When the embankment formation of the lowermost layer is completed as described above, the process proceeds to the embankment formation of the second layer. In the second layer of construction, first, as shown in FIG. 13, the embankment layer G ₁
The second-stage reinforcing material 2 is laid on the top. One end 2a of the reinforcing material 2, optionally, the fill layer G ₁ is fixed by an anchor 21 implanted at predetermined intervals, the other end portion 2
b hangs on the ground B ′ on the front side from the grooved wall material 1 of the first stage.

After the reinforcing members 2 are laid, as shown in FIG. 14, the plurality of grooved wall materials 1 of the second stage are arranged in a row on the plurality of grooved wall materials 1 of the first stage and stacked. . As described above, since the grooved wall material 1 before filling with the soil 3 is lightweight, the stacking installation work can be easily performed with a small amount of labor.

The grooved wall material 1 of the second stage has a bottom plate 1c.
As but it is supported straddling the upper and the end portion upper surface of the embankment layer G ₁ behind the first stage of the channel wall material 1 of the rear plate 1b, the first stage of the channel wall member It is arranged at a position retracted from 1. That is, since the second-stage grooved wall material 1 is stacked on the first-stage grooved wall material 1 in the form of a platform, the upper surface of the soil 3 filled in the first-stage grooved wall material 1 Is exposed at the lower front part of the second-step grooved wall material 1. Also, in order to avoid local deformation of the embankment wall, vertical joints formed between the second-stage grooved wall materials 1 and 1 are formed in the first-stage grooved wall materials 1 and 1. It is desirable to stack them so as to be at an intermediate position between the vertical joints between the two.

Next, as shown in FIG. 15, the filling space 1S of each of the grooved wall materials 1 of the second stage was filled with the soil 3 and dripped from above the grooved wall material 1 of the first stage. End 2b of reinforcement 2
The folded so as to involve the trench wall material 1 of the second stage, overlapping the laying portion on the embankment layer G ₁ in the reinforcing member 2, the overlapped portion, at predetermined intervals in the embankment layer G ₁ It is fixed by the required number of anchors 22 that have been driven. Although not shown for the subsequent steps of the second stage back side of the trench wall surface material 1, pressure rolling smoothed laid out sprinkled fill material at a thickness out seeded suitable on the embankment layer G ₁ work Is repeated a required number of times to obtain a second embankment layer G having a layer thickness Δh.
Form ₂ . Thus, the reinforcing member 2 of the second stage becomes an embedded state between the embankment layer G ₁ and G _2, given a frictional force.

As described above, a series of steps such as laying the reinforcing material 2 → stacking and installing the grooved wall material 1 → filling the soil 3 → connecting the reinforcing material 2 and the grooved wall material 1 → embankment of the embankment layer. Is repeated in the third and subsequent construction steps in the same manner, thereby forming an embankment G having a height h having a reinforced bed embankment W having a nested bed shape as shown in FIG.

Finally, plants 4 are planted at appropriate intervals on the soil 3 exposed on the upper surface of the grooved wall material 1 at each step of the reinforcing embankment wall W. In this case, for example, shrubs such as azaleas can be selected as the plants 4, and thus, a greening wall in harmony with the surrounding natural environment can be constructed.

In the above-described method, the case where a flexible net-like or lattice-like material is used as the reinforcing material 2 has been described. The construction method is as shown in FIGS.

In this case, in the reinforcing member laying step corresponding to FIG. 7 described above, as shown in FIG. 16, a required number of reinforcing members 2 made of a band-shaped metal plate are arranged in a direction in which the grooved wall materials 1 are laid. The drainage layer F (the second or higher level) extends at a fixed interval ΔLc from the back surface 1b of the grooved wall material 1 in a direction perpendicular to the back plate 1b (a direction parallel to the cross section shown in the figure). It is laid on the embankment layer during construction. At this time, the reinforcing member 2 having the connection hole 2c is laid so that the end of the reinforcing member 2 is located at the portion where the groove-shaped wall material is to be installed on the base treatment BG. The laying interval ΔLc corresponds to, for example, 1 / n (n is an integer) of the horizontal length Lc of the grooved wall material 1 shown in FIG. Therefore, in this case, n reinforcing members 2 are laid on each groove-shaped wall member 1.

Next, as shown in FIG. 17, the plurality of grooved wall materials 1 in the first stage are cross-sectioned in the drawing so as to straddle the ends of the plurality of reinforcing members 2 on the base treatment BG. It is installed so as to be lined up in a line in the direction perpendicular to the floor. Then, a connection bolt 23 is passed from a water passage hole 1d or a connection hole (not shown) formed in the bottom plate 13 of each of the grooved wall materials 1 to a connection hole 2c at an end of each reinforcing member 2, and the connection bolt 23 The groove-type wall member 1 and the reinforcing member 2 are connected via the.

Next, as shown in FIG.
The filling space 1S is filled with the soil 3 and, as shown in FIG. 19, the embankment material G 'is scattered on the back side of the grooved wall material 1 and spread, and then the work of rolling is repeated a required number of times. to form the embankment layer G ₁ of the lowermost layer thickness Delta] h. The formation of the second stage or more is performed in the same process.

As shown in FIG. 20, when the groove type wall material 1 having a high height La is used, as shown in FIG.
It is desirable to connect the reinforcing member 2 not only to the lower end of the back plate 1b of the grooved wall material 1, but also to the intermediate height. In this case, the lower reinforcing member _2L is attached to the lower end of the rear plate 1b of the installed grooved wall material 1 with the connecting bolt 24, and then the grooved wall material 1 is mounted.
An embankment material is scattered on the back side of the slab, and the work of rolling is performed a required number of times to form an embankment layer _GL having a thickness corresponding to the intermediate height of the grooved wall material 1. _L
The upper reinforcing material _2H is laid on the upper surface of the slab, and is attached to the intermediate height of the back plate 1b with the connecting bolts 25, and then the embankment material is scattered and compacted again to obtain the upper end of the grooved wall material 1. The embankment layer _GH up to the height is formed. Since the trench wall material 1 when it is supported by the middle also reinforced with high material 2 _H, it becomes a stable wall material.

The present invention is not limited to the illustrated embodiment. For example, in the groove type wall material 1 shown in FIG. 2 or FIG. 4, instead of the connecting plate 1e or the connecting portion 1f, the front plate 1a and the back plate 1b are connected by a partition wall formed so as to vertically partition the filling space 1S. A good structure may be used.

[0038]

According to the present invention, the following effects are realized. (1) There is no need to create, transport, and stack a large amount of sandbags. (2) By selecting the grooved wall material to be piled up, a stable reinforced embankment wall can be obtained regardless of the degree of the gradient of the wall surface. (3) Since the grooved wall material is lightweight, it can be easily transported and piled up on site, and since the soil is filled after the piled-up wall, a stable reinforced embankment wall can be obtained. (4) The strength is higher than the embankment wall made of sandbags, and deformation can be suppressed. (5) Shrubs and the like can be vegetated on the soil filled in the grooved wall material, so that the wall surface can be constructed in harmony with the surrounding natural environment. In particular, greening can be made dense by allowing vegetation to also be provided on the front side of the grooved wall material. (6) By using plastic or steel plate grooved wall material, it can follow a certain degree of deformation,
Large displacement such as the wall surface caused by concrete blocks does not occur. (7) Since the grooved wall material can be mass-produced, the cost can be reduced.

[Brief description of the drawings]

FIG. 1 shows a completed construction state of a steep reinforced embankment wall according to the method of the present invention, wherein (a) is a partial front view, and (b) is a vertical cross section cut at the II ′ position in (a). FIG.

FIG. 2 is a perspective view showing an example of a groove type wall material used in the method of the present invention.

FIG. 3 is a vertical sectional view showing a completed construction state of a gently reinforced embankment wall by the method of the present invention.

FIG. 4 is a perspective view showing another example of the groove type wall material used in the method of the present invention.

FIG. 5 is a perspective view showing a completed construction state of a steep reinforced embankment wall using the grooved wall material of FIG. 4;

FIG. 6 is an explanatory view showing a step of leveling an embankment site to be embanked and forming a foundation ground in the first embodiment of the present invention for embankment shown in FIG. 1;

FIG. 7 is an explanatory view showing a step of laying a first-stage reinforcing material in the first embodiment.

FIG. 8 is an explanatory view showing a step of installing a first-step grooved wall material in the first embodiment.

FIG. 9 is an explanatory view showing a step of filling the first-stage grooved wall material with soil in the first embodiment.

FIG. 10 is an explanatory view showing a step of connecting a reinforcing material to the grooved wall material in the first embodiment.

FIG. 11 is an explanatory view showing a process of forming a first-stage embankment layer in the first embodiment.

FIG. 12 is an explanatory diagram showing a completed state of the first-stage embankment layer in the first embodiment.

FIG. 13 is an explanatory diagram showing a state in which a second-stage reinforcing material is laid in the first embodiment.

FIG. 14 is an explanatory view showing a state in which the second-step grooved wall materials are stacked in the first embodiment.

FIG. 15 is an explanatory view showing a state in which the second-stage grooved wall material is filled with soil in the first embodiment.

FIG. 16 is an explanatory view showing a step of laying a first-stage reinforcing material in the second embodiment using a reinforcing material made of a strip-shaped metal plate.

FIG. 17 is an explanatory view showing a state in which the first-stage grooved wall material is installed and connected to a reinforcing material in the second embodiment.

FIG. 18 is an explanatory view showing a state in which the first-stage grooved wall material is filled with soil in the second embodiment.

FIG. 19 is an explanatory diagram showing a state in which a first-stage embankment layer is formed in the second embodiment.

FIG. 20 is an explanatory diagram showing a connection structure with a reinforcing material when a tall grooved wall material is used in the second embodiment.

[Explanation of symbols]

1 channel-shaped wall surface material 1a front plate 1b rear plate 1c bottom plate 1d water passage holes 2 stiffener 3 Sat 4 plants B foundation ground G embankment ground G ₁ ~G _n embankment layer W reinforcing embankments wall

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroyuki Nakano 4-6-115 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Shinji Fukushima 4-6-1-15 Sendagaya, Shibuya-ku, Tokyo Stock Company (72) Inventor Akira Kitajima 4-6-15 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd.

Claims (5)

[Claims] In the construction of a reinforced embankment wall composed of wall materials stacked in a plurality of stages along an embankment wall, a groove-shaped wall material composed of a front plate, a back plate and a bottom slab, which are continuous with each other, is applied to a portion serving as an embankment wall. Arranging, filling the earth into a filling space surrounded by the front plate, the back plate, and the bottom plate and having an open upper end; and a height of the groove-shaped wall material in the embankment ground formation area behind the groove-shaped wall material. A reinforced embankment wall method using a grooved wall material characterized by repeating the steps of embedding an embankment layer having a thickness approximately equivalent to that of each step in each step. 2. The grooved wall material according to claim 1, wherein a required number of water holes are opened in the bottom plate of the grooved wall material, and the second or more grooved wall material is a back plate of the lower grooved wall material. Reinforced embankment using a grooved wall material, which is stacked at a position recessed from the lower grooved wall material so as to be supported across the upper end of the embankment and the upper end portion of the embankment layer behind it. Wall construction method. 3. The reinforced embankment wall method using a groove-type wall material according to claim 1, wherein the front face of the groove-type wall material is formed in a porous or lattice-like shape. 4. The method according to claim 1, wherein the back plate of the grooved wall material is formed in a shape inclined toward the front plate side. 5. The groove-type wall material according to claim 1, wherein the groove-type wall material is fixed to an end of a reinforcing material embedded in the embankment layer. Reinforced embankment wall method.