JP2009121160A - Wall face block, reinforced soil wall structure, and reinforced soil wall constructing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wall face block having stability when built up, and to provide a reinforced soil wall structure using the same and its constructing method. <P>SOLUTION: The wall face block A includes a wall part 1, a bottom plate 2, and brace parts 3, wherein a lattice body 4 is embedded in the bottom plate 2 and part of the lattice body 4 is exposed from a rear end face 2b of the bottom plate 2 to form a connection portion to a reinforcing material 15. In the reinforced soil wall structure, the plurality of wall face blocks 11 are arranged side by side on a concrete foundation 11 and installed heightwise. In each wall face block A, the reinforcing material 15 placed in a landfill 13 is connected to the lattice body 4 exposed from the rear end face 2b of the bottom plate 2. In the constructing method, the plurality of wall face blocks A are installed side by side on the concrete foundation 11, the reinforcing materials 14 are connected to the lattice bodies 4 exposed from the rear end faces 2b of the bottom plates 2 and placed on the landfill, the landfill 13 is leveled and rolled on the placed reinforcing materials 15, and then the wall face blocks are additionally installed on the upper parts of the wall face blocks so as to be built up to a predetermined height. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wall surface block used for a wall material of a reinforced earth wall construction method, a reinforced earth wall structure using the wall surface block, and a method for constructing a reinforced earth wall.

  In recent years, when constructing roads and other structures in urban areas, it has become necessary to construct a bank with a slope that is steeper than a normal bank due to restrictions on the site. Instead, the use of reinforced earth wall methods is increasing.

  Reinforced earth wall method is a banking method using wall material, reinforcing material and embankment material, earth pressure acting on the wall material, and pulling resistance of the reinforcement material laid in the embankment material and connected to the wall material It is possible to form a steep wall surface that is vertical or nearly vertical by balancing the two.

  The concrete panel or concrete block used as the wall material of the reinforced earth wall is connected to the reinforcing material by passing a horizontal bar through the embedded metal embedded in the wall material and winding the reinforcing material around the horizontal bar to fix it. Various methods are used, such as a method of directly embedding a material in a wall surface material, a method of sandwiching and fixing a reinforcing material between wall surface materials.

  The method of passing the horizontal bar through the embedded hardware embedded in the wall material and wrapping and fixing the reinforcing material around the horizontal bar is to use a U-shaped, U-shaped, L-shaped or other relatively simple hardware. It can be connected, but if the tensile force from the reinforcing material applied to the horizontal bar increases, the horizontal bar deforms and the tensile force of the reinforcing material is not sufficiently transmitted to the wall material. Distortion may occur.

  The method of directly embedding the reinforcing material in the wall surface material is such that the reinforcing material and the wall surface material are directly connected to each other and reliable transmission of stress is possible, but there is a problem that the wall material manufacturing and transporting operations become complicated. .

  The method of sandwiching and fixing the reinforcing material between the wall materials is relatively easy, but stress concentrates on the sandwiched portion, so that the reinforcing material may be cut.

  Moreover, as a structure which reinforces embankment, the embankment reinforcement structure described, for example in patent document 1 is proposed. In this technique, a horizontal bar is embedded in the concrete wall material and the vertical bar is integrated with the horizontal bar to expose the circular part formed at the tip of the vertical bar, while the expanded bar is expanded. A mesh-like reinforcing member such as metal is embedded, and a circular portion of a vertical bar is fitted into the mesh of the reinforcing member, and a horizontal beam is inserted into the circular portion to connect the two. This technology has the feature that the reinforcing member will not be cut even if settlement occurs in the embankment, but it is necessary to embed a specially shaped metal fitting in the wall material for connection, which is disadvantageous in terms of cost. is there.

  Moreover, the technique described in Patent Document 2 relates to a connection device that connects a retaining wall and a fill reinforcement, and a connecting wire mesh is projected from the back of a concrete wall panel, and the reinforcement is filled at the end. The wall panel and the embankment reinforcing material are connected to each other by overlapping the connection end portions of the materials, inserting the locking portions of the connection devices into the respective meshes, and inserting the locking pins. In this technique, it is possible to easily connect the retaining wall and the embankment reinforcing material, but it is necessary to use a specially shaped metal fitting for the connection, which is disadvantageous in terms of cost. Further, in order to secure the pulling strength from the wall panel of the connecting wire mesh, it is necessary to embed the connecting wire mesh deeply in the wall panel, and the thickness of the wall panel cannot be reduced.

  Furthermore, in the construction of reinforced soil walls, after the completion of the reinforced soil walls, stabilization is achieved by the balance between the earth pressure acting on the wall material and the pullout resistance of the reinforcing material laid on the embankment material. However, conventional rectangular parallelepiped wall blocks are generally unstable, and it is necessary to pay close attention to the construction management in order to prevent the stacked wall blocks from falling over.

JP 2005-68897 A JP 2005-194748 A

  The object of the present invention is to ensure stress transmission with the reinforcing material, to exhibit stability when stacked, and to make the wall panel thinner, easy to construct, and manufactured. The object is to provide a low-cost wall block, a reinforced earth wall structure using the wall block, and a method for constructing the reinforced earth wall structure.

  In order to solve the above problems, a wall surface block according to the present invention is a wall surface block having a wall portion, a bottom plate, and a holding portion, wherein the lattice body is embedded in the bottom plate of the wall surface block and a part of the lattice body is placed on the bottom plate. It is exposed from the rear end surface and is used as a connection portion with the reinforcing material.

  In the wall surface block, it is preferable that a pitch of the lattice body in a direction parallel to the surface of the wall surface block is 20 mm or more and 130 mm or less.

  Further, in any one of the above-mentioned wall blocks, the grid body has a large number of steel wires arranged at a preset pitch and welded to a steel wire arranged in a direction orthogonal to the steel wires. It is preferable that

  A reinforced earth wall structure according to the present invention comprises a plurality of wall blocks according to any one of claims 1 to 3 arranged on a concrete foundation and installed in a height direction. The reinforcing material laid in the embankment is connected to the grid exposed from the end face.

  Moreover, the construction method of the reinforced earth wall structure which concerns on this invention installs the wall surface block in any one of Claims 1 thru | or 3 side by side on the concrete foundation constructed beforehand, and the rear-end surface of the baseplate of this wall surface block Reinforcement material is connected to the grid that is exposed from laying on the embankment, the embedding material is spread on the laid reinforcement material, rolled, and then a new wall block is installed on top of the wall block. And connecting the reinforcing material to the grid body exposed from the rear end face of the wall block, laying the reinforcing material, leveling the embankment material, repeating the rolling, and stacking the wall block to a predetermined height. It is.

  Since the wall surface block according to the present invention has the bottom plate and the holding portion, high stability can be exhibited when a new wall surface block is laminated on the upper surface of the wall surface block already installed at the time of construction. Further, since the lattice body is embedded in the bottom plate and a part thereof is exposed from the rear end face of the bottom plate, the reinforcing material can be connected to the exposed lattice body. For this reason, workability improves and a smooth operation can be performed. Furthermore, even if the thickness of the wall block is reduced, such stability and workability can be maintained.

  Moreover, the number of the steel materials which protrude from the rear-end surface of the baseplate which comprises a grid body can be increased by setting the pitch of the direction parallel to a wall surface block of a grid body to 20 mm or more and 130 mm or less. For this reason, even when a bending force acts on the grid body exposed from the bottom plate via a reinforcing material laid in the embankment, it can counter the bending force that the grid body acts on and ensures a reliable tensile stress. Can be transmitted.

  When the grid body is a welded wire mesh in which a large number of steel wires are arranged at a preset pitch and the steel wires arranged in a direction orthogonal to the steel wires are welded, the wall surface can be obtained by a relatively simple process. A panel can be manufactured and a reinforcing material can be easily connected to the welded wire mesh exposed from the bottom plate.

  Further, in the reinforced earth wall structure according to the present invention, any of the wall blocks described above are arranged in the horizontal direction on the concrete foundation and installed in the height direction, and the wall blocks are exposed to the lattice body exposed from the rear end surface of the bottom plate. Since the reinforcing material laid in the embankment is connected, the laminated wall blocks are individually fixed to the ground via the reinforcing material, so that a stable reinforced earth wall structure can be obtained.

  Further, in the method for constructing a reinforced earth wall structure according to the present invention, a plurality of wall blocks described above are arranged side by side on a concrete foundation, and the reinforcing material is applied to the lattice exposed from the rear end face of the bottom plate of each wall block. And then laying on the embankment, spreading the embankment material on the laid reinforcing material, rolling, and then installing a new wall block on the wall block and performing the same work in sequence When a new wall block is installed above the already installed wall block and stacked to a predetermined height, the target reinforced earth wall structure can be constructed.

  In particular, the connecting portion of the reinforcing material to the wall block can be only a lattice projecting from the bottom plate of the wall block, and in this case, one reinforcing material is connected to one wall block. Therefore, workability can be improved.

  Hereinafter, the configuration of the wall surface block according to the present invention will be described with reference to the drawings. FIG. 1 is a three-view diagram illustrating the configuration of the wall surface block. FIG. 2 is a perspective view of the wall surface block shown in FIG.

  The wall surface block A shown in FIGS. 1 and 2 is configured as a reinforced concrete block having a preset size. The wall surface block A protrudes substantially perpendicularly to the top surface 2a of the bottom plate 2 from the back surface 1b of the wall portion 1, the bottom plate 2 formed at approximately 90 degrees from the lower end portion of the wall portion 1 to the back surface 1b side. The bottom plate 2 has a lattice 4 embedded therein.

  In addition, as a wall surface block, an unreinforced concrete block other than a reinforced concrete block can be used. Moreover, a fiber reinforced concrete block, a lightweight concrete block, etc. can also be used.

  The wall portion 1 is installed on the front surface 1a exposed when stacked, the back surface 1b, the upper end surface 1c serving as an installation surface for installing another wall block A, and the foundation concrete or the already installed wall block A. A protrusion 1e formed on one side surface in the width direction, and a recess 1f that fits the protrusion 1e is formed on the other side surface.

  In addition, a hole 1g for fitting a guide pin 5 for smoothly connecting the upper and lower wall surface blocks A when the wall surface blocks A are stacked is formed at a predetermined position of the upper end surface 1c of the wall portion 1. A hole 1h for fitting the guide pin 5 is also formed at a predetermined position on the lower end surface 1d. Further, on both sides in the width direction of the back surface 1b, inserts 1i are provided for fixing the connection plates 6 that connect the wall surface blocks A installed side by side.

  The surface 1a can be used without any special treatment, but ceramics, tiles, stones, color mortars, concavo-convex patterns with formwork, natural stones (cobblestones, rubble stones, special rocks, etc.) embedded, A product having a makeup finish such as painting can be used.

  A grid 4 is embedded in the bottom plate 2. The end portion of the lattice body 4 on the surface 1a side is bent upward in an L shape and embedded in the wall portion, and a part on the opposite side is parallel to the bottom plate 2 from the rear end surface 2b of the bottom plate 2. It protrudes in the direction (direction substantially perpendicular to the back surface 1b of the wall 1).

  As described above, the lattice body may be embedded in the wall surface block without being connected to the reinforcing bars for wall portion reinforcement, but may be connected to the reinforcing bars for wall portion reinforcement. The grid body and the reinforcing bar may be connected by welding or bundling or by hooking the grid body to the reinforcing bar.

  As the lattice body, a plurality of reinforcing bars are arranged at a preset pitch, and a welded wire mesh or a reinforcing bar lattice that is welded to the reinforcing bars arranged in a direction orthogonal to the reinforcing bars is preferably used.

  The lattice body 4 includes a plurality of vertical reinforcing bars 4a arranged in a direction perpendicular to the wall surface 1 and horizontal reinforcing bars 4b arranged in a direction orthogonal to the vertical reinforcing bars 4a. From the rear end surface 2b, an end portion of the vertical reinforcing bar 4a and a horizontal reinforcing bar 4b integrated with the end portion protrude. The protruding length of the lattice body 4 from the rear end surface 2b of the bottom plate 2 is not particularly limited, but is preferably longer in consideration of workability when connecting a reinforcing material to be described later. Considering the elimination of the risk of damage due to the collision, the shorter one is preferable. From these points, the protruding length of the lattice 4 is preferably about plus or minus 80 mm, more preferably around plus or minus 40 mm, centering on 120 mm.

  The pitch of the vertical reinforcing bars 4a constituting the lattice body 4 is set to 20 mm or more and 130 mm or less. If the pitch of the vertical reinforcing bars 4a is smaller than the above value, there is a risk that the work of throwing crushed stones may be hindered when constructing the reinforced earth wall, or the work of connecting the reinforcing material may be complicated, and the pitch may be reduced. If the value is larger than the above value, bending may occur when the bending force is transmitted through the connected reinforcing material. In this respect, the pitch of the vertical reinforcing bars 4a is preferably 20 mm or more and 130 mm or less, more preferably 25 mm or more and 100 mm or less, and preferably 30 mm or more and 70 mm or less.

  On the other hand, the pitch of the horizontal reinforcing bars is the same as the pitch of the vertical reinforcing bars, and can be a square mesh, or one of the pitches can be increased to form a rectangular mesh. A rectangular mesh larger than the pitch is preferably used. Further, it is not necessary that the respective pitches are equally spaced. For example, the pitch of the horizontal reinforcing bars can be different between the inside of the block and the exposed portion. In addition, the pitch of the horizontal reinforcing bars at the connecting portion with the reinforcing material can be made larger or smaller than the pitch of the other portions.

  Moreover, although the exposed part of a lattice body can also be arrange | positioned at right angle with respect to a wall surface block, it can be made to project at an angle other than a right angle with a wall surface block, and can also be bent in an exposed part. In order to facilitate the connection work, a shape in which the vertical reinforcing bars of the exposed portions of the grid body are projected at right angles to the wall surface block and the rear end portion is bent obliquely upward is preferable.

  As the lattice body, in addition to the above-described welded wire mesh and reinforcing steel lattice, a metal lattice body such as a plain woven wire mesh or a material in which linear materials are arranged vertically and horizontally such as a resin lattice body can be used. In order to prevent corrosion in the embankment, the surface of the metal grid is preferably subjected to plating treatment, polymer coating treatment, resin coating, or the like.

  In the lattice body 4, a plurality of vertical reinforcing bars 4a are embedded in the bottom plate 2 of the wall block A at the above pitch, and the rear end portion protrudes from the rear end face 2b, and the horizontal reinforcing bars 4b are integrally attached to the protruding end portion. Can be configured. In this case, field work is required, and it may be difficult to ensure good workability. For this reason, a plurality of vertical reinforcing bars 4a and horizontal reinforcing bars 4b are previously arranged in a lattice shape and integrated by welding to form a welded wire mesh, which is embedded in the bottom plate 2 and partially protrudes from the rear end surface 2b. It is preferable to configure as described above.

  The wall surface block may be provided with an auxiliary connection portion for connection with the reinforcing material in addition to the connecting portion with the reinforcing material by the lattice body embedded in the bottom surface. As the auxiliary connection portion, a metal fitting for connection, a lattice body or the like embedded in a wall surface or a holding portion can be used, and in particular, an auxiliary connection portion is provided in the block installed at the uppermost stage. preferable.

  The protruding length of the bottom plate 2 on the back of the block should ensure the stability when the wall blocks are stacked, ensure the embedding length of the grid-like body, and consider the weight and cost during construction. It is preferably 0.1 to 0.5 times the block height and 50 mm to 300 mm.

  The size of the wall portion of the wall block is usually in the range of 300 mm to 3000 mm in height and width respectively, but in order to ensure stability during construction, the height is preferably smaller than the width, and the height is 500 mm. More preferably, the width is ˜700 mm and the lateral width is 1500 mm to 2500 mm.

  The wall thickness of the wall block is necessary to withstand the earth pressure of the embankment and the gravity of the block installed on it. The range of 25 to 200 mm is preferable, and the range of 30 to 120 mm is more preferable. The wall surface block of the present invention has a bottom plate and a holding portion, embeds a grid body in the bottom plate and exposes a part of the grid body from the rear end surface of the bottom plate as a connection portion with a reinforcing material. While maintaining the stability and performance of the time, the wall thickness can be reduced and the weight can be reduced.

  The holding portions 3 are formed at two locations on the back side of the wall portion 1, the upper end surface 3 a is formed in the same plane as the upper end surface 1 c of the wall portion 1, and the rear end surface 3 b is the same as the rear end surface 2 b of the bottom plate 2. It is formed in the plane. For this reason, the side view of the wall block is a rectangle that is long in the vertical direction. And since the holding | maintenance part 3 is formed in this way, when installing a new wall surface block A in the upper part of the already installed wall surface block A, the bottom face of the baseplate 2 is the upper end surface 1c of the wall surface 1, and the holding part 3 It is possible to maintain a stable state with respect to the upper end surface 3a. In addition, the holding part 3 can also be formed in 1 place or 3 places or more, and it is good also as shapes other than a rectangle as needed.

  In the wall block A configured as described above, when the side wall blocks A are arranged adjacent to each other in the width direction, the protrusions 1e formed on the side surface of one wall block A are fitted into the recesses 1f of the other wall block A adjacent to each other. It is possible to arrange them without gaps.

  In addition, a guide pin 5 is inserted into a hole 1g formed in the upper end surface 1c of the wall surface block A that has already been arranged, and a new wall surface block A is disposed on the upper surface of the wall surface block A so as to be formed on the bottom surface. By inserting the guide pins 5 standing up through the formed holes 1h, they can be easily stacked.

  Next, the structure of the reinforced earth wall structure using the wall surface block A configured as described above will be described, and the construction method of the reinforced earth wall structure will be described together. 3-5 is a figure explaining the procedure of the method of constructing a reinforced earth wall structure. FIG. 7 is a diagram for explaining the constructed reinforced earth wall structure.

  First, as shown in FIG. 3 (a), the foundation concrete 11 is constructed at the site where the wall block A is to be installed when constructing the target reinforced earth wall structure. At this time, the foundation concrete 11 is constructed. The method of doing is not limited, and a generally performed method can be adopted.

  Next, as shown in FIG. 2B, a plurality of wall blocks A are arranged on the foundation concrete 11 while fitting the protrusions 1e to the recesses 1f of the adjacent wall block A. At this time, the adjacent wall blocks A are connected to each other using the insert 1i formed on the back surface 1b and the connection plate 6. The ground on the back side of the wall block A is excavated and leveled, and the space between the foundation concrete 11 and the leveled ground 12 is backfilled.

  After arranging a predetermined number of wall surface blocks A on the foundation concrete 11 and connecting the adjacent wall surface blocks A using the connection plate 6, the bottom plate 2 of the wall surface block A is shown in FIG. The reinforcing material 15 is connected to the lattice body 4 protruding from the rear end face.

  The connection structure between the lattice 4 and the reinforcing material 15 is not particularly limited, and is preferably set as appropriate according to the structure of the reinforcing material 15. For example, in the case where the reinforcing material 15 is configured in a net shape, the end of the net is passed through the grid of the vertical bars 4a and the horizontal bars 4b of the grid body 4 and is shown in the passed net. It is possible to engage and connect the bar to the lattice body 4 by passing the non-adhering bar, and the first connection is made in a horizontal row of nets in which the ends of the reinforcing member 15 are folded 180 degrees and stacked one above the other. The bars are alternately inserted from above and below, and the folded end of the reinforcing member is drawn from the lower side of the horizontal reinforcing bar at the rear end of the grid body to the upper side of the rear end through the rear end of the vertical reinforcing bar. It is also possible to connect the second connecting rod inserted inside the folded end by locking it from the upper side of the rear end of the vertical reinforcing bar.

  A free end of the reinforcing member 15 connected to the lattice body 4 extends along the ground 12 and is fixed to the ground 12 by a fixture 16 such as a pile. Thereby, the reinforcing material 15 is laid, and the wall surface block A is connected to the ground 12 via the laid reinforcing material 15.

  Next, as shown to Fig.4 (a), the embankment material 13 is spread | laid on the ground 12 which laid the reinforcement material 15, and it equalizes equally. As the embankment material 13, it is possible to use normal embankment soil or the like.

  After the leveling of the embankment material 13 is completed, the leveled embankment material 13 is pressed by a rolling machine 19 as shown in FIG. When this rolling is finished, the top end level of the embankment 13 made of the embankment material 13 becomes substantially equal to the level of the wall portion 1 of the wall block A installed on the concrete foundation 11 and the upper end surfaces 1c and 3a of the retaining portion 3. .

  When the series of operations described above is completed, the stacking of the first-stage wall block A, the connection of the reinforcing material 15 to the stacked wall block A, the laying of the reinforcing material, the leveling of the embankment material, and the rolling compaction are completed. Then, move on to the next stage.

  First, as shown in FIG. 5 (a), the guide pin 5 is inserted into the hole 1g formed in the upper end surface 1c of the wall surface block A that has already been installed, and the upper end side is erected, so that a new wall block A The guide pin 5 is inserted into the hole 1h formed in the bottom surface of the wall surface block A while being positioned, and is installed while being positioned. Moreover, the wall surface blocks A installed in the already installed wall surface block A are connected using the connection plate 6.

  When a new wall surface block A is installed above the wall surface block A that has already been installed as described above, the installed wall surface block A is the upper end surface 1c of the wall portion 1 of the wall surface block A that has already been installed. It will be installed in contact with the upper end surface 3 a of the part 3. For this reason, it is possible to ensure a large contact area, and since the installation surface has a square shape, it is possible to ensure a stable installation state.

  And after installing a new wall surface block A (wall surface block A arranged at the second level) over the entire length of the already installed wall surface block A, it is arranged at the second level as shown in FIG. The reinforcing member 15 is connected to the lattice body 4 protruding from the rear end surface of the bottom plate 2 of the wall block A. The connection work at this time is performed as described above. Then, the reinforcing material 15 is laid by extending the free end of the reinforcing material 15 connected to the lattice body 4 along the embankment 13 and fixing it to the embankment 13 with the fixture 16.

  After the reinforcing material 15 is laid on the embankment 13, a new embankment material 13 is laid on the embankment 13 on which the reinforcing material 15 is laid and leveled. After the leveling of the embankment material 13 is completed, the leveled embankment material 13 is rolled by a rolling machine (see FIG. 4B). When this rolling is completed, the top level of the embankment 13 becomes substantially equal to the levels of the wall portion 1 of the second wall surface block A and the upper end surfaces 1c and 3a of the retaining portion 3.

  A new wall surface block A is installed on the upper part of the already installed wall surface block A by sequentially proceeding with the above operations, and as shown in FIG. 6, the wall surface block A is stacked up to a preset number of steps for the purpose of reinforcement. A mud wall structure is constructed.

  As a drainage measure, it is preferable to provide a crushed stone layer between the wall block and the embankment material or to install a drain material. When providing a crushed stone layer, you may put partitions, such as a nonwoven fabric and a metal net, between a banking material and a crushed stone layer.

  In addition, the embedding of the embankment material, leveling, and rolling can be performed once each time the wall block is stacked as described above, corresponding to the wall block height. Each work can be performed multiple times. For example, laying, leveling and rolling the embankment material so that it is approximately half the height of the wall surface block, and further laying, leveling and rolling the remaining height, wall surface block A It can be made to be substantially equal to the level of the upper end surfaces 1c and 3a of the wall portion 1 and the retaining portion 3.

  In addition, it is also preferable to provide a nonwoven fabric or the like at the connecting portion of the wall block in order to prevent suction.

  The wall surface block of the present invention is advantageous when used to construct a wall surface that reinforces the slope of the embankment. The reinforced earth wall structure of the present invention is advantageous because it can rationally reinforce the slope of the embankment. Furthermore, the method for constructing a reinforced earth wall structure of the present invention is advantageous when used to construct the reinforced earth wall structure.

It is a three-view figure explaining the structure of a wall surface block. It is a perspective view of the wall surface block shown in FIG. It is a figure explaining the procedure of the method of constructing a reinforced earth wall structure. It is a figure explaining the procedure of the method of constructing a reinforced earth wall structure. It is a figure explaining the procedure of the method of constructing a reinforced earth wall structure. It is a figure explaining the constructed reinforced earth wall structure.

Explanation of symbols

A Wall block 1 Wall 1a Surface 1b Back 1c Upper end 1d Lower end 1e Projection 1f Recess 1g 1h Hole 1i Insert 2 Bottom plate 2a Upper surface 2b Rear end surface 3 Holding portion 3a Upper end surface 3b Rear end surface 4 Grid 4a Horizontal reinforcing bar 5 Guide pin 6 Connection plate 11 Foundation concrete 12 Ground 13 Embankment material 14 Crushed stone 15 Reinforcement material 16 Fixing tool 19 Rolling machine

Claims (5)

A wall surface block having a wall portion, a bottom plate, and a holding portion, wherein a lattice body is embedded in the bottom plate of the wall surface block, and a part of the lattice body is exposed from a rear end surface of the bottom plate to form a connection portion with a reinforcing material. A wall block characterized by that. The wall surface block according to claim 1, wherein a pitch of the lattice body in a direction parallel to the surface of the wall surface block is 20 mm or more and 130 mm or less. The grid body is a welded wire mesh in which a large number of steel wires are arranged at a predetermined pitch and welded to a steel wire arranged in a direction orthogonal to the steel wires. Or the wall surface block described in 2. A plurality of wall blocks according to any one of claims 1 to 3 are arranged on a concrete foundation and installed in a height direction, and each wall block is laid in the embankment on a grid exposed from the rear end face of the bottom plate. Reinforced earth wall structure, characterized in that a reinforcing material is connected. A plurality of wall blocks according to any one of claims 1 to 3 are installed side by side on a concrete foundation constructed in advance, and a reinforcing material is connected to a grid body exposed from the rear end face of the bottom plate of the wall block on the embankment. Laying, leveling the embankment material on the laid reinforcing material, rolling, and then installing a new wall block on top of the wall block and reinforcing the grid body exposed from the rear end surface of the wall block A method for constructing a reinforced earth wall structure, characterized in that connection of materials, laying of reinforcing material, leveling of embankment material, rolling and rolling are repeated, and wall surface blocks are piled up to a predetermined height.

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