JP3315100B2 - Reinforced soil structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced soil structure for preventing a slope from collapsing and forming a stable slope.

[0002]

FIG. 34 shows a reinforced earth structure 1 according to the prior art.
It is a perspective view which shows a part of. For example, when laying a road, the reinforcing soil structure 1 is constructed. Reinforced soil structure 1
A plurality of earth retaining blocks 2 are stacked on a field board (not shown) to form an earth retaining wall 3, a back soil 4 is accommodated behind the earth retaining wall 3, and a reinforcing body 5 is embedded in the back soil 4. The reinforcement body 5 is constructed by being connected to the retaining wall 3. Such a reinforced soil structure 1 has a structure in which the stiffener 5 is connected to the retaining wall 3 so that the soil 4
Is transmitted to the retaining wall 3 to stabilize the retaining wall 3 against the soil pressure acting on the retaining wall 3.

[0003] The earth retaining block 2 is made of concrete, and is sandwiched between spaces provided in upper and lower concrete, and a fixing jig 6 made of a polymer material is mounted thereon. The reinforcing member 5 is a sheet made of a plastic such as polyethylene or polypropylene which is a polymer material, and has a plurality of through holes 7 formed therein. The protrusions 6 of the retaining block 2 are respectively inserted through the through holes 7 of the reinforcing member 5, and the reinforcing members 5 are locked to the respective projections 6, whereby the reinforcing member 5 is connected to the retaining block 2 and thus to the retaining wall 3. Have been.

FIG. 35 is an exploded perspective view showing a part of another conventional reinforcing earth structure 10. As shown in FIG. Similarly to the reinforcing soil structure 1, the reinforcing soil structure 10 also has a plurality of retaining blocks 12 stacked on a not-shown field plate to form a retaining wall 13, and a back soil 14 is provided behind the retaining wall 13. Is housed, a reinforcing body 15 is buried in the back soil 14, and the reinforcing body 15 is further connected to the retaining wall 13. Such a reinforced soil structure 10 is also provided by connecting the reinforced body 15 to the retaining wall 13.
Is transmitted to the retaining wall 13 against the soil 14 behind the soil, and the retaining wall 13 is opposed to the soil pressure acting on the retaining wall 13.
Has stabilized.

The retaining block 12 is made of concrete, and has a fitting groove 16 formed therein. Reinforcement 15
Is a reinforcing bar grid formed by welding a plurality of reinforcing bars into a lattice shape. The fitting hole 16 of the retaining block 12 is open upward, and the reinforcing bar 15 is fitted into the fitting hole 16 so that the reinforcing member 15 is inserted into the retaining block 12 and thus the retaining wall 13. Are linked.

[0006]

In the prior art shown in FIG. 34, each fixing jig 6, a portion of the reinforcing member 5 which is locked to the fixing jig 6, and the fixing jig 6 of the earth retaining block 2 are mounted. There is a possibility that a large force acts locally on the parts to be damaged, and these parts may be damaged. If such damage occurs, the connection between the retaining wall 3 and the reinforcing member 5 cannot be maintained.

Similarly, in another conventional technique shown in FIG. 35, a portion which is fitted into and engaged with the fitting hole 16 of the reinforcing member 15 and the reinforcing member 15 of the retaining block 12 are also locked. Large local forces may act on the parts, damaging them. If such damage occurs, the connection between the retaining wall 13 and the reinforcing member 15 cannot be maintained.

An object of the present invention is to provide a reinforced soil structure which can prevent a large force from locally acting on a reinforcing body and a retaining block, and can reliably maintain a connected state between the reinforcing body and the retaining wall. It is to be.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a plurality of retaining blocks, each having an upper recess opening upward and a lower recess opening downward, are stacked one above the other. The earth retaining wall in which the crushed stone material is stored in the recess and the lower recess, the back soil stored behind the earth retaining wall, the buried part buried in the back soil, and the end of the embedded part near the earth retaining wall A mesh sheet-like reinforcing member having a connecting portion that is inserted into the retaining wall from between adjacent retaining blocks vertically and is in contact with the crushed stone material, and the crushed stone material partially fits into the mesh of the reinforcing member. And a reinforcing member that obtains a large mechanical locking force so that the reinforcing member is not pulled out from the retaining wall.

According to the present invention, the retaining wall is formed by stacking a plurality of retaining blocks, and each retaining block is formed with an upper recess and a lower recess, and accommodates crushed stone. ing. The back soil is accommodated behind such a retaining wall, and a mesh sheet-like reinforcing body is provided in a state where the buried portion is buried in the back soil. A connecting portion connected to an end of the buried portion of the reinforcement near the retaining wall is inserted into the retaining wall from between vertically adjacent retaining blocks. The crushed stone material is brought into contact with the connecting portion of the reinforcing member inserted between the retaining blocks, and the crushed stone material partially fits into the mesh of the connecting portion of the reinforcing member in the form of a net sheet. Mechanical engagement occurs between the connecting portion of the crushed stone material and the crushed stone material, and the reinforcing member is locked to the retaining wall and connected by a so-called interlocking effect. In this way, the retaining wall and the reinforcing body are connected by the interlocking effect of the reinforcing body and the crushed stone material in the retaining wall,
Compared to a configuration in which a projection is inserted into a through hole and locked as in the conventional technology, and a configuration in which a fixing jig is fitted and locked in a fitting hole, a larger locking area is used for the retaining wall. Can be stopped. Therefore, it is possible to prevent a large local force from acting on the reinforcing member and prevent the reinforcing member from being damaged. Moreover, rather than simply sandwiching the reinforcing body between the retaining blocks, the crushed stone is stored in the retaining block, and the crushed stone is fitted into the mesh of the reinforcing body so that the reinforcing body is not pulled out of the retaining wall. A mechanical locking force can be obtained. In addition, the mechanical locking force based on the interlocking effect hardly decreases even if moisture adheres to the crushed stone material and the reinforcing body due to rainfall, etc. It is suitable.

[0011]

According to the present invention, since the crushed stone is fitted into the mesh of the connecting portion of the reinforcing member, the crushed stone is brought into contact with the connecting portion of the reinforcing member from both sides in the thickness direction and from one side. As compared to the case where the reinforcing member is not pulled out from the retaining wall, a large mechanical locking force can be obtained due to the interlocking effect, and the reinforcing member can be securely locked to the retaining wall. , Can be connected more firmly.
Also, the present invention provides a reinforced soil structure having at least one reinforcing body, wherein a contact surface in which the reinforcing body is not inserted is present among the contact surfaces of the vertically adjacent earthing blocks. Body. According to the present invention, the retaining block has a concave portion that opens up and down, the concave portion is continuous in the retaining block stacked vertically, and the crushed stone material is continuous with the upper and lower retaining blocks in the concave portion. The reinforcement is inserted into the earth retaining wall from between vertically adjacent earth retaining blocks while contacting the upper and lower surfaces of the connecting portion at the end with the crushed stone. By using such a soil retaining block and continuously filling the concave portions of the upper and lower soil retaining blocks with the crushed stone material and inserting the upper and lower surfaces of the reinforcing member into contact with the crushed stone, and inserting between the upper and lower soil retaining blocks, as shown in FIG. As described above, the effect of the crushed stone can provide a larger pull-out resistance than that without the crushed stone. Also,
As shown in FIG. 19, when the vertical load is small, a large pulling force cannot be obtained only by the block, but the presence of the crushed stone exerts a large pulling force. As a result, as shown in FIG. 13, a large drawing force is obtained in proportion to the increase in the vertical load. Therefore, as shown in FIGS. 14 to 17, the distribution is densely distributed in the deep soil layer from the top end of the retaining wall and coarsely laid in the shallow soil layer according to the magnitude of the earth pressure, and the design corresponding to the earth pressure is made. It can be performed. However, as can be seen from FIGS. 14 to 17, as the depth from the top becomes shallower, the spacing between the reinforcing members should be larger in design, but the height of each retaining block is low. In order to take the vertical interval, there is a retaining block into which the reinforcing member is not inserted, and the stability of the retaining block in that portion becomes a problem. On the other hand, if a reinforcing member is inserted between all the upper and lower earth retaining blocks, it becomes uneconomical and practically difficult. The present invention enables a stable reinforced soil wall despite the existence of a retaining block in which the reinforcing body is not inserted.Practical application of an economically reinforced soil wall by providing reinforcing bodies at intervals corresponding to the design. Is a successful one. According to the present invention, the retaining block has a concave portion which is opened up and down, and the concave portion is made continuous in the retaining blocks stacked vertically, and the concave portion is filled with crushed stone material continuously in the upper and lower retaining blocks, The reinforcing body is inserted into the earth retaining wall from between vertically adjacent earth retaining blocks while contacting the upper and lower surfaces of the end connecting portion with the crushed stone material. For this reason, among the contact surfaces of the upper and lower adjacent retaining blocks, even if there is a contact surface into which the reinforcing member is not inserted, the stability of the retaining block wall can be maintained, so that the minimum reinforcing member corresponding to the design can be maintained. This enables an economically reinforced soil wall with a density of

Further, the present invention is characterized in that the connecting portion of the reinforcing body is wound around a part of the earth retaining wall and folded back, and a portion near the tip end is inserted into the back soil. Further, the present invention is the reinforcing soil structure, wherein a part of the retaining block according to any one of claims 1 to 3 is formed of a vegetation block.

According to the present invention, the connecting portion of the reinforcing member is
Part of the retaining wall, for example, FIGS. 21 and 22; FIGS. 26 and 2
7 is folded back around the back plate 42, and the portion near the tip is inserted into the back soil, so that the connecting portion inserted between the retaining blocks is interlocking with the crushed stone material described above. Not only the effect, but also the bearing pressure resistance between the back soil near the tip that is inserted into the back soil can be used as a force to prevent it from falling out of the retaining wall. In addition, the reinforcing body can be firmly locked to the retaining wall and connected more firmly. Vegetation blocks may be used. Also, the present invention provides (a) a retaining wall on which a plurality of retaining blocks are vertically stacked, and each retaining block has a front plate 4
1, through-holes 27a to 27 extending in the vertical direction by a back plate 42 located rearward of the front plate 41 by X2 and connecting plates 43a and 43b extending in the front-rear directions X1 and X2 and connecting the front plate 41 and the back plate 42. (B) a back soil 22 accommodated in the rear portion X2 of the back plate 42 of the soil block, (c) a mesh sheet-like reinforcing body 23a, and (c1) a back soil. And (c2) a connecting portion 36A which is inserted into the retaining wall from between vertically adjacent retaining blocks following the end of the retaining portion 35 near the retaining wall, and (c2) 1) In the first portion 90, (c2-1-1) in the through holes 27 a to 27 c, the upper portion of the back plate 42 is bent upward from below the back plate 42 of the retaining block in front of the back plate 42. A rising portion 191 rising along the surface; (c2 -1-2) The rear plate 4 connected to the rising portion 191
And (c2-1-3) the folded portion 192, which is continuous with the folded portion 192,
2, a rising portion 193 that is bent downward on the rear side of the back plate 42 and extends along the surface of the back plate 42 to near the upper surface of the embedded portion 35; and (c2-1-4) a rising portion 193. , Back plate 4
(C2-2) a second portion 91 having a rear extension portion 194 extending into the back soil 22 along the buried portion 35 behind the second portion; Divided in the front-rear direction X1, X2 and inserted between the connecting plates 43a, 43b of the vertically adjacent earth retaining block 25,
A reinforcing member 23A including a connecting portion 36A having a second portion 91 extending in the front-rear direction X1 and X2 to near the front end of the retaining block; and (d) a crushed stone 33 inserted into the through holes 27a to 27c. Including such a crushed stone material 33 that fits into the mesh of the rising portion 191 and provides a large mechanical locking force so that the reinforcement body 23A is not pulled out of the retaining wall by the crushed stone material 33. It is a reinforced soil structure characterized by the following. In addition, the present invention is a retaining wall on which a plurality of retaining blocks are vertically stacked, and each retaining block has a front plate 41, a rear plate 42 rearward of the front plate 41, and a back and forth direction X1, By connecting plates 43a and 43b extending to X2 and connecting the front plate 41 and the rear plate 42,
A retaining wall in which through holes 27a to 27c extending vertically are formed; (b) a back soil 22 accommodated in the rear portion X2 of the back plate 42 of the retaining block; and (c) a mesh sheet-like reinforcing body 23a. (C1) a buried portion 35 buried in the back soil; and (c2) a connecting portion 36A which is inserted into the retaining wall from between vertically adjacent retaining blocks connected to an end of the buried portion 35 near the retaining wall. (C2-1) the first portion 90, (c2-1-1) in the through holes 27a to 27c, from below the back plate 42 of the retaining block to upward in front of the back plate 42. A rising portion 191 that is bent and rises along the surface of the back plate 42;
And (c2-1-3) the folded portion 192, which is continuous with the folded portion 192,
And (c2-2) a second portion 91, wherein the first portion 90 extends in the front-rear directions X1 and X2. It is divided and inserted between the connecting plates 43a and 43b of the vertically adjacent earth retaining block 25,
A reinforcing member 23A including a connecting portion 36A having a second portion 91 extending in the front-rear direction X1 and X2 to near the front end of the retaining block; and (d) a crushed stone 33 inserted into the through holes 27a to 27c. Including such a crushed stone material 33 that fits into the mesh of the rising portion 191 and provides a large mechanical locking force so that the reinforcement body 23A is not pulled out of the retaining wall by the crushed stone material 33. It is a reinforced soil structure characterized by the following. According to the present invention, as shown in FIGS. 21 to 25, the retaining wall is configured by stacking a plurality of retaining blocks, and each retaining block is formed with through holes 27a to 27c. Is housed. Also, the present invention provides (a) a retaining wall on which a plurality of retaining blocks are vertically stacked, and each retaining block has a front plate 4
1, through-holes 27a to 27 extending in the vertical direction by a back plate 42 located rearward of the front plate 41 by X2 and connecting plates 43a and 43b extending in the front-rear directions X1 and X2 and connecting the front plate 41 and the back plate 42. (B) a back soil 22 accommodated in the rear portion X2 of the back plate 42 of the soil block, (c) a mesh sheet-like reinforcing body 23a, and (c1) a back soil. And (c2) a connecting portion 36A which is inserted into the retaining wall from between vertically adjacent retaining blocks following the end of the retaining portion 35 near the retaining wall, and (c2) 1) The first portion 90, (c2-1-1) a front extending portion extending from below the back plate 42 and the through holes 27a to 27c of the retaining block to near the front plate 41 in the through holes 27a to 27c. 199, and (c2-1-2) (C2-1-3) a rising portion 195 connected to the front extending portion 199 and bent upward on the rear side of the front plate 41 and rising along the surface of the front plate 41; 4
1, a folded portion 196 extending rearward on the through holes 27a to 27c and the back plate 42, and (c2-1-4) a folded portion 196,
(C2-1-5) a falling portion 197 that is bent downward from the top of the rear plate 42 on the rear side of the back plate 42 and extends along the surface of the back plate 42 to near the upper surface of the embedded portion 35; And back plate 4
(C2-2) a second portion 91 that has a rearwardly extending portion 198 that extends rearward of the second portion 2 and extends into the back soil 22 along the buried portion 35; Is divided in the front-rear direction X1 and X2, and is inserted between the connecting plates 43a and 43b of the earthing block 25 adjacent vertically,
A reinforcing member 23A including a connecting portion 36A having a second portion 91 extending in the front-rear direction X1 and X2 to near the front end of the retaining block; and (d) a crushed stone 33 inserted into the through holes 27a to 27c. A large mechanical locking force is obtained by fitting into the mesh of the front extending portion 199, the rising portion 195, and the folded portion 196 so that the crushed stone 33 prevents the reinforcement 23A from being pulled out from the retaining wall. And a crushed stone material 33. Also, the present invention provides (a) a retaining wall on which a plurality of retaining blocks are vertically stacked, and each retaining block has a front plate 4
1, through-holes 27a to 27 extending in the vertical direction by a back plate 42 located rearward of the front plate 41 by X2 and connecting plates 43a and 43b extending in the front-rear directions X1 and X2 and connecting the front plate 41 and the back plate 42. (B) a back soil 22 accommodated in the rear portion X2 of the back plate 42 of the soil block, (c) a mesh sheet-like reinforcing body 23a, and (c1) a back soil. And (c2) a connecting portion 36A which is inserted into the retaining wall from between vertically adjacent retaining blocks following the end of the retaining portion 35 near the retaining wall, and (c2) 1) The first portion 90, (c2-1-1) a front extending portion extending from below the back plate 42 and the through holes 27a to 27c of the retaining block to near the front plate 41 in the through holes 27a to 27c. 199, and (c2-1-2) (C2-1-3) a rising portion 201 connected to the front extending portion 199, bent upward on the rear side of the front plate 41 and rising along the surface of the front plate 41; 4
(C2-1-4) a folded portion 202 which is folded back to the rear on the back plate 1 and extends above the through holes 27a to 27c and the back plate 42;
2 that extends rearward and extends into the back soil 22
And (c2-2) the second portion 91, wherein the first portion 90 is divided in the front-rear direction X1 and X2, and is connected to the connecting plate 43a of the earth retaining block 25 adjacent vertically. , 43b,
(D) a crushed stone material 33 inserted into the through holes 27a to 27c, including a connecting portion 36A having a second portion 91 extending to near the front end of the retaining block in the front and rear directions X1 and X2; A large mechanical locking force is obtained by fitting into the mesh of the front extending portion 199, the rising portion 195, and the folded portion 196 so that the crushed stone 33 prevents the reinforcement 23A from being pulled out from the retaining wall. And a crushed stone material 33. According to the present invention, as shown in FIGS.

[0015]

FIG. 1 is a sectional view showing a part of a reinforcing earth structure 20 according to an embodiment of the present invention. FIG.
FIG. 4 shows a cross section as seen from a section line II of FIG. 3 described later. The reinforcing soil structure 20 includes a retaining wall 21, a back soil 22, and a reinforcing body 23. The retaining wall 21 has a plurality of non-planting blocks 25 and a plurality of planting blocks 26. The non-planting block 25 has through holes 27a, 27 penetrating vertically.
b, 27c are formed, and these through holes 27a to 27C are formed.
The upper regions 28a, 28b and 28c are open to the upper Z1, and the lower regions 29a, 29b and 29c are open to the lower Z2. Each of the upper regions 28a to 28c corresponds to an upper recess, and each of the lower regions 29a to 29c corresponds to a lower recess.

The planting block 26 has upper recesses 30a, 30b, and 30c formed in an upper portion Z1 and upper recesses 30a, 30b, and 30c formed in a lower portion Z2.
31c is formed at the bottom. Each of the blocks 25 and 26, which are such retaining blocks, are stacked up and down, specifically, in the vertical direction Z1 and Z2 which are vertical directions, and the through holes 27a to 27c of the non-planting block 25, the planting block. 26 upper recesses 30a-30c and lower recesses 31a-31c
The crushed stone material 33 is accommodated therein, and the retaining wall 21 is formed.
Hereinafter, when the non-planting block 25 and the planting block 26 are collectively referred to, they may be referred to as soil retaining blocks 25 and 26. In addition, the upper regions 28a to 28c are
8c, and the lower regions 29a to 29c are referred to as lower recesses 29a.
~ 29c in some cases.

The back soil 22 is made of, for example, sandy soil,
It is accommodated behind the retaining wall 21, that is, at the rear X 2 which is one of the front-back directions X 1 and X 2 which is the thickness direction of the retaining wall 21. The reinforcing body 23 is a net-shaped sheet body. The reinforcing member 23 has a buried portion 35 buried in the back soil 22,
And from the space between the retaining blocks 25 and 26 vertically adjacent to the retaining wall 21 at the end of the buried portion 35 near the retaining wall 21.
And a connecting portion 36 that is inserted into the inside and is brought into contact with the crushed stone material 33. The front and rear directions X1 and X2 are horizontal directions orthogonal to the vertical directions Z1 and Z2.

FIG. 2 is a simplified sectional view showing the reinforcing soil structure 20, FIG. 3 is a front view showing a part of the reinforcing soil structure 20, and FIG. FIG. FIG. 4 shows a portion where the planting block 26 is not provided. FIG. 5 is a perspective view showing a state in which a plurality of retaining blocks 25 and 26 are stacked. The reinforced soil structure 20 is constructed, for example, when laying a road or the like, in order to prevent a slope from falling down and collapsing, and to form a stable slope 100. In the reinforced soil structure 20, a plurality of retaining blocks 25 and 26 are stacked on a field plate 40 (not shown) to form a retaining wall 21, and a back soil 22 is accommodated behind the retaining wall 21. 22
A reinforcement body 23 is embedded in the slab, and the reinforcement body 23 is connected to the retaining wall 21 to be constructed. By connecting the reinforcing member 23 to the retaining wall 21, the reinforcing soil structure 20 transmits the pull-out resistance force of the reinforcing member 23 to the back soil 22 to the retaining wall 21, and the earth pressure acting on the retaining wall 21. And the retaining wall 21 is stabilized.

FIG. 6 shows the non-planting block 25. FIG. 6 (1) is a plan view, FIG. 6 (2) is a front view, and FIG. 6 (3) is a right side view. is there. Non-planting block 2
Reference numeral 5 denotes a front-rear direction (vertical direction in FIG. 6A), a left-right direction (left-right direction in FIG. 6A), and a vertical direction (FIG.
(The direction perpendicular to the plane of FIG. 1) is the front-back direction X1, X2, the left-right direction Y1, Y2, and the up-down direction Z of the reinforcing soil structure 20.
1 and Z2 are provided so as to coincide with each other. The left and right directions Y1 and Y2 are horizontal directions orthogonal to the front and rear directions X1 and X2 and the vertical directions Z1 and Z2, respectively. The non-planting block 25 has, for example, a strength f′ck = 27 N / mm ² (270 kgf / c
m ² ) a block of concrete,
A front plate 41 extending in the left-right direction Y1, Y2;
A rear plate 42 arranged in parallel with the front plate 41 at a distance from the rear to the rear X2, and two connecting plates 43a and 43b connecting the front plate 41 and the rear plate 42. The connecting plates 43a and 43b are arranged in parallel at intervals at positions symmetrical in the left and right directions Y1 and Y2. On the front plate 41,
At the center of the left and right directions Y1 and Y2, there is provided a decorative portion 41a which protrudes forward X1 and has an uneven surface.

The dimensions of the non-planting block 25 are selected, for example, as follows. The lateral dimension W1 (hereinafter sometimes referred to as “width”) is, for example, 595 mm, which is specifically the lateral dimension of the front plate 41, and the width W1a of the rear plate 42 is For example, it is 575 mm, which is shorter by 10 mm on both left and right sides. The dimension D1 in the front-rear direction (hereinafter sometimes referred to as “depth”) is 300
mm and the depth D1a of the portion excluding the decorative portion 41a.
Is 270 mm. Vertical dimension (hereinafter referred to as “height”
H1 is 250 mm.

In the non-planting block 25, a through hole 27a having a rectangular cross section is formed at the center in the left-right direction, surrounded by the front plate 41, the back plate 42, and the connecting plates 43a, 43b. You. Also, one side (left Y1) is surrounded by the front plate 41, the rear plate 42, and the left connecting plate 43a.
A left side through hole 27b having a rectangular cross-sectional shape that is open to the outside is formed, surrounded by the front plate 41, the rear plate 42, and the right connecting plate 43b, and has a cross-sectional shape that opens to the other side (right side Y2). A rectangular through hole 27c on the right side is formed.

The depth of each of the through holes 27a to 27c is the same, and its dimension D2 is 175 mm. The width W2 of the central through hole 27a is 200 mm, and the width W3 of each of the right and left through holes 27b and 27c is 97.5 mm. Here, the width W3 is a dimension from the left and right end surfaces of the front plate 41.

As described above, each of the through holes 27b and 27c has substantially the same shape as one of the shapes obtained by dividing the central through hole 27a into two at the center in the left-right direction Y1 and Y2. Therefore, when the plurality of non-planting blocks 25 are arranged close to each other in the left-right direction Y1 and Y2, the right through-hole 27c of the block 25 arranged on the left side of the two adjacent non-planting blocks 25 and the right side And the left through hole 27b of the block 25 arranged in the
One hole having substantially the same shape as that of FIG.
The holes formed by 7b and 27c and the through holes 27a are formed so as to be alternately arranged at equal intervals in the left-right direction Y1 and Y2.

The non-planting block 25 includes a front plate 41.
And the connecting plates 43a and 43b are continuous with each other, and thus the through holes 27a and 27b in the left and right directions Y1 and Y2.
Between the holes and between the through holes 27b and 27c, insertion holes 45a and 45b for the connecting pins are formed, respectively. These two
The insertion holes 45a and 45b of the two connecting pins have inner diameters of 20.
mm, each having an axis parallel to the vertical directions Z1 and Z2, and formed so as to penetrate in the vertical directions Z1 and Z2. Each of the insertion holes 45a and 45b is a non-planting block 2
5 are arranged in such a manner that they are arranged at equal intervals in the left-right direction Y1 and Y2 when they are arranged close to each other in the left-right direction Y1 and Y2.

Further, in other words, regarding the positions of the through holes 27a to 27c and the insertion holes 45, the left half of the through hole 27a and the through hole 27b are located in the left and right directions Y1 and Y2.
Is symmetrical with respect to a virtual plane 52a at a position one quarter of the width W1 from the left end, and the axis of the left insertion hole 45a is arranged on the virtual plane 52a.
The right half of the through hole 27a and the through hole 27c are perpendicular to the left-right directions Y1 and Y2 and symmetric with respect to a virtual plane 52b at a position one quarter of the width W1 from the right end. The right insertion hole 45 on the flat surface 52b
The axis of b is arranged.

FIG. 7 is a view showing the planting block 26, FIG. 7 (1) is a plan view, FIG. 7 (2) is a front view, and FIG. 7 (3) is a right side view. . Planting block 26
Are the front-back direction (vertical direction in FIG. 7 (1)), the left-right direction (left-right direction in FIG. 7 (1)), and the vertical direction (FIG. 7 (1)).
Is perpendicular to the paper surface of FIG.
1, X2, horizontal directions Y1, Y2 and vertical directions Z1, Z
2 are provided so as to coincide with each other. The planting block 26 is a block made of concrete having the same strength as the non-planting block 25, and is formed in a substantially rectangular parallelepiped shape. The depth D4 of the planting block 26 is the same as the depth D1a of the non-planting block 25 except for the decorative portion 41a. The width W4 of the planting block 26 is the same as the width W1 of the non-planting block 25, and the height H4 of the planting block 26 is
It is twice the height H1 of the non-planting block 25.

The planting block 26 has a vertical direction Z1, Z2.
, Two planting holes 47 penetrating in the front-rear directions X1 and X2 are formed. Each planting hole 47 is in the left-right direction Y
It is formed at a position substantially symmetrical with respect to 1, Y2 with an interval. At the center of the planting block 26 in the left-right direction Y1, Y2, a bottomed upper recess 30 that is open only to the upper part Z1 at the top.
a is formed, and a bottomed lower recess 31a that is open only to the lower part Z2 is formed in the lower part. In addition, on both sides in the left-right direction of the planting block 26, upper-side recesses 30 b and 30 c having a bottom opening to the upper part Z <b> 1 are formed at the top, and
Bottom-side lower recesses 31b, 31 which open to the lower part Z2 at the lower part
c is formed. The recesses 30b and 31b are also open to the left Y1, and the recesses 30c and 31c are also open to the right Y2.

The depth D5 of each of the recesses 30a to 30c and 31a to 31c corresponds to each of the through holes 27a to 27d of the non-planting block 25.
It is the same as the depth D2 of 27c. Central recesses 30
a, 31a, the width W5 of the through-hole 2 of the non-planting block 25
7a, and is the same as the width W2 of each recess 30b.
30c; the width W6 of 31b, 31c is the non-planting block 2
5 is the same as the width W3 of each through hole 27b, 27c. Further, the depth (vertical dimension) H7 of each of the recesses 30a to 30c and 31a to 31c is, for example, 35 mm.

Each of the upper recesses 30b and 30c is
0a is divided into two at the center in the left-right direction Y1, Y2, and has almost the same shape as one of the two. Therefore, when the plurality of planting blocks 26 are arranged in the left-right direction Y1 and Y2 so as to be close to each other, the right upper recess 30c of the block 26 arranged on the left side of the two adjacent planting blocks 26 and the right side And the upper recess 30b on the left side of the block 26 disposed in the upper recess 30a, a single recess having substantially the same shape as the upper recess 30a is formed.
b, 30c and upper recess 30a
Are alternately arranged at equal intervals in the left-right direction Y1 and Y2.

In the planting block 26, each of the upper recesses 3 in the left-right direction Y1 and Y2 is located at a position closer to the upper front.
0a, 30b and between the upper recesses 30b, 30c, respectively, are formed with insertion holes 49a, 49b for the connecting pins, respectively, and at the lower forward position, the upper recesses 30a, 30b and between the upper recesses 30b, 30c, the insertion holes 50a, 50
b are respectively formed. Each insertion hole 49a, 49b; 5
0a and 50b are cylindrical with an inner diameter of 20 mm, and have axes parallel to the vertical directions Z1 and Z2, respectively.
The insertion hole 49a arranged on the left side and the insertion hole 50a arranged on the left side are formed so as to have the same axis on a straight line, so-called coaxially. And the insertion hole 50b is formed so as to have the same axis so as to coincide with another straight line. The two insertion holes 49a and 49b are bottomed holes that open upward, and the two insertion holes 50a and 50b.
b is a hole whose upper end is opened at each planting hole 47 and whose lower end is opened downward. Each insertion hole 49a, 49b
Is formed at a position such that when the non-planting blocks 25 are arranged close to each other in the left-right directions Y1 and Y2, they are arranged at equal intervals in the left-right directions Y1 and Y2. Each insertion hole 50a, 5
0b is also formed in the same manner as the respective insertion holes 49a, 49b.

Further, the non-planting block 25 and the planting block 26 are stacked so that the respective insertion holes 45 and the respective insertion holes 49 and 50 are arranged on the same axis, respectively, in the vertical direction Z1, When projected on an imaginary plane perpendicular to Z2, the through hole 27a, the upper recess 29a, and the lower recess 30a coincide, and the through hole 27b, the upper recess 29b, and the lower recess 30b match, and Hole 27c, upper recess 29c, and lower recess 3
0c matches. Therefore, the non-planting block 25
When the plant and the planting block 26 are arranged close to each other in the left-right direction Y1, Y2, the vertical direction of the space formed by the opposed through holes 27b (or 27c) and the recesses 30c, 31c (or 30b, 31b) The cross section perpendicular to the cross section is substantially the same as the cross section of the through hole 27a and each of the recesses 30a and 31a.

Further, each recess 30a-30c; 31a-3
1c and the positions of the insertion holes 49a, 49b; 50a, 50b, in other words, the left half of the upper recess 30a and the upper recess 30b are perpendicular to the left and right directions Y1, Y2 and have a width from the left end. W4 is symmetric with respect to the virtual plane 53a at a quarter position, and the lower recess 31a
And the lower recess 31b are formed by a virtual plane 53
The axis of the left insertion hole 45a is symmetrical with respect to a, and is disposed on the virtual plane 53a. The right half of the upper recess 30a and the upper recess 30c are perpendicular to the left-right direction Y1 and Y2, and symmetric with respect to the virtual plane 53b at a position one quarter of the width W4 from the right end. The right half of the lower recess 31a and the lower recess 31c
Is symmetrical with respect to the virtual plane 53a, and the axis of the left insertion hole 45a is arranged on the virtual plane 53b.

The respective retaining blocks 25 and 26 are arranged in the left and right directions Y1 and Y2, and the up and down direction Z
1, Z2. In the present embodiment, as shown in FIG. 3, the non-planting blocks 25 are mainly used, and the planting blocks 26 are stacked so as to be appropriately scattered.
The non-planting blocks 25 are aligned in the left and right directions Y1 and Y2, and are stacked vertically in a plurality of stages in such a state. Non-planting block 2 of vertically adjacent steps
5 is arranged in either the left-right direction Y1 or Y2 with a distance of about half the width W1.

Each of the non-planting blocks 25 vertically adjacent to each other is connected to a connecting pin 57 realized by a round bar made of synthetic resin.
, X1, X2 and Y1, Y
The mutual displacement of the two is prevented. One of the insertion holes 49a, 49b is arranged on the same axis in the state where the planting blocks 26 vertically adjacent to each other are shifted in the left-right direction as described above, and the connecting pin 57 is placed on the same axis. Are commonly inserted through the insertion holes 49a and 49b. The connecting pin 57 may be a short member provided only over two vertically adjacent blocks 25 or a long member provided over three or more blocks 25.

As described above, the non-planting blocks 25 are stacked while being shifted in the left-right direction Y1 and Y2, and the vertically adjacent non-planting blocks 25 are connected to each other by the connecting pins 57 so as to be adjacent in the left-right direction. The non-planting blocks 25 are connected to each other via non-planting blocks vertically adjacent to each other. Therefore, all the non-planting blocks 25 are connected directly or indirectly.

The planting block 26 replaces a part of the non-planting block 25 stacked in this way,
Provided. The planting block 26 has substantially the same size as a structure in which two non-planting blocks 25 are aligned and stacked vertically, and the planting block 26 is located at a position where the planting block 26 is to be arranged.
One non-planting block 25 and two blocks 25 adjacent above or below the non-planting block 25 are arranged in an area formed by removing half each. Therefore, when stacking both the non-planting blocks 25 and the planting blocks 26, the non-planting blocks 25a and 25b are provided in order to form an area where the planting blocks 26 are arranged. Each non-planting block 2
5a and 25b move the non-planting block 25 in the left-right direction Y1,
It has a shape divided into two at the center of Y2, and detailed description is omitted.

The planting block 26 has the insertion holes 49a, 49b; 50a, 50b as described above. Insertion holes 45a, 45b of the planting block 25
And on the same axis, and each of the insertion holes 50a, 50
0b is the insertion hole 45 of the non-planting block 25 adjacent to the lower side.
a and 45b are on the same axis as the connecting pin 57.
Are connected in the same manner as when the non-planting blocks 25 are connected to each other. In this way, the soil retaining blocks 25 and 26 (including the non-planting blocks 25a and 25b) are stacked and directly and indirectly interconnected.

The two non-planting blocks 25 adjacent to each other in the left-right direction Y1 and Y2 form a through-hole 27b of one non-planting block 25 and a through-hole 2 of the other non-planting block 25.
7c are arranged to face each other, and a hole having substantially the same shape as the through hole 27a is formed. This hole is vertically connected to the through hole 27a of the non-planting block 25 adjacent vertically, without shifting in the front-rear direction and the left-right direction.

The non-planting blocks 25, 25a, 25b
And the planting block 26 are adjacent to the left and right directions Y1 and Y2,
Each of the recesses 30b, 30c; 31b, 31c has a through hole 27b, 27c of the non-planting block 25 and a through hole 27a (the through hole 27b, 2) of each of the non-planting blocks 25a, 25b.
7c), and forms a space (hole) 110 having a cross section substantially similar to that of the through hole 27a. Each recess 30b, 30
c; the space formed by 31b and 31c, and each of the recesses 30a and 31a are formed by the through-hole 27a and each of the through-holes 27a and 27b of the non-planting block 25 vertically adjacent to each other.
The hole is vertically connected to any one of the holes formed by the above without shifting in the front-rear direction and the left-right direction.

FIG. 8 is a plan view showing a part of the reinforcing member 23. The reinforcing body 23 is a grid-like woven or knitted material called a geogrid or the like, which is made of polyester fiber and whose surface is impregnated and coated with an acrylic resin. Specifically, a plurality of first members 55 and a plurality of horizontal members 56 orthogonal to the first vertical member 55 are woven and woven in a lattice shape, and are formed in a net sheet shape. The members 55 and 56 are
Formed using polyester fiber as described above as a material,
The surface is coated with an acrylic resin. Each first member 55 is arranged at regular intervals L1, and each second member 56 is arranged at regular intervals L2.
1, L2 are equal to each other, for example, 17 mm.
The first and second members 55 and 56 are welded to each other. Such a reinforcing member 23 has a tensile strength of, for example, about 4 t to 15 t per 1 m width.

The reinforcing members 23 are provided substantially horizontally, for example, every two stages of the non-planting block 25. The width (the left-right dimension) of the reinforcing member 23 is appropriately selected. When the left-right dimension of the retaining wall 21 is larger than the width of the reinforcing member 23, the plurality of reinforcing members 23 are provided side by side in the left-right direction. Depth of reinforcement 23 (front-back dimension)
Is appropriately selected to have a length required to obtain the resistance required for stabilizing the retaining wall 21 from the back soil 22.

The connecting portion 36 is inserted between the vertically adjacent retaining blocks 25 and 26, and the reinforcing body 23 is partially sandwiched between the retaining blocks 25 and 26, and is provided on the remaining portion excluding the sandwiched portion. , Each through hole 27a-2
7c and the crushed stone material 33 accommodated in each of the recesses 30a to 30c and 31a to 31c are brought into contact with each other. In the present embodiment, the portion of the connecting portion 36 of the reinforcing body that comes into contact with the crushed stone 33 is one of the upper recesses 28a to 28c and 30a to 30c and the lower recesses 29a to 29c and 31a to 31c. 31
c is inserted into a space formed in a vertically connected manner, and accordingly, each of the recesses 28a to 28c,
It is inserted into the crushed stone material 33 stored in 29a-29c, 30a-30c, 31a-31c.

The crushed stone 33 is made of crushed stone having a particle size of, for example, 25 mm or less. The crushed stone partially fits in the mesh of the reinforcing member 23, thereby connecting the connecting portion 36 of the reinforcing member 23 and the crushed stone. The reinforcing member 23 is locked to the retaining wall 21 and connected by a so-called interlocking effect by utilizing the mechanical engagement with the retaining member 33. As described above, the retaining wall 21 and the reinforcing member 23 are connected by the interlocking effect between the reinforcing member 23 and the crushed stone material 33 in the retaining wall 21, and the projection is inserted into the through hole as in the related art and locked. As compared with the configuration in which the fixing jig is fitted into the fitting hole and the configuration in which the fixing jig is locked, the locking jig can be locked to the retaining wall 21 with a wider locking area. Therefore, it is possible to prevent a large local force from acting on the reinforcement 23 and prevent the reinforcement 23 from being damaged. Moreover, the reinforcing member 23 is connected to the retaining block 2.
Do not simply pinch by 5 and 26
The crushed stones 33 are accommodated in the reinforcements 5 and 26, and the crushed stones 33 are fitted into the mesh of the reinforcing member 23, and a large mechanical locking force is applied so that the reinforcing member 23 is not pulled out from the retaining wall 21. Obtainable.

Further, since the connecting portion 36 of the reinforcing member 23 is inserted into the crushed stone 33, the crushed stone 33 is
3 is in contact with the connecting portion 36 from both sides in the thickness direction, and compared with the case where the connecting portion 36 is contacted from one side, the crushed stones largely fit into the mesh, and a greater interlocking effect can be obtained. It can be firmly locked to the retaining wall 21 and connected more firmly.

FIG. 9 is a diagram for explaining the procedure for constructing the reinforced soil structure 20. Referring also to FIGS. 1 to 8,
First, as a first step, a local panel 40 at a place where the reinforcing soil structure 20 is to be provided is excavated to secure a space for constructing the reinforcing soil structure 20. Next, as step 2, the retaining wall 21
The base concrete 60 is cast below the position where the is formed. This foundation concrete has, for example, a front-rear dimension of 0.5 m, a vertical dimension of 0.15 m,
It is cast in the left and right directions Y1 and Y2 over the area where the retaining wall 21 is provided.

Next, as step 3, the first non-planting block 25 is placed on the foundation concrete 60 in the left-right direction Y.
1 and Y2. Next, as step 4, in the installed state, the crushed stone material 33 is put into each of the through holes 27a to 27c, housed in a state where it is compacted by protruding with a piercing rod, and the back soil 22 is placed behind the non-planting block 25. Are rolled out using, for example, a rolling compactor and compacted. Thus, a state as shown in FIG. 9A is obtained. In addition, the crushed stone material 33 and the back soil 22 can be more firmly compacted by being housed a plurality of times, for example, twice. On the back soil 22, a local board 40 is provided to secure a space for constructing the reinforced soil structure 20.
The earth and sand generated when excavating can be used.

Next, as shown in FIG. 9 (2), as shown in FIG. 9 (2), the laying is performed from the non-planting block 25 to the rear back soil 22. At this time, the non-planting block 2 of the reinforcing body 23
5 and the portion located on the crushed stone 33 are the connecting portions 36, and the portion located on the back soil 22 is the burying portion 35.
At this time, the connecting pin 57 is partially inserted into the insertion holes 45a and 45b, and is projected upward.

Next, as a step 6, the non-planting block 25 of the second stage is set on the non-planting block 25 of the first stage as shown in FIG. At this time, as described above,
In the first stage and the second stage, the blocks 25 are displaced in the left-right direction, and are connected by inserting the protruding portions of the connection pins 57 into the insertion holes 45a and 45b. Thereafter, the above-described steps 3 to 5 are performed, and the second stage can be formed in the same manner as the first stage. Such a work can be repeated as necessary to construct the reinforcing earth structure 20 having a required height.

Here, when the reinforcing member 23 does not need to be provided for each step, for example, when it is provided for every two steps as described above, the operation of step 5 is omitted as appropriate and the operation is performed. When arranging the planting blocks 26, they may be arranged instead of the non-planting blocks 25. At this time, as described above, since the shapes and dimensions are different and the height is equal to two steps, the work may be performed half the height at a time.

The reinforcing soil structure 20 is subjected to an internal stability study and an external stability study to determine the arrangement intervals of the reinforcing bodies 23 in the vertical Z1 and Z2 directions, and thus the earth retaining block 2.
5, 26, how many stages are arranged, the front-rear direction X of the reinforcing body 23
1, X2 length, that is, the buried length buried in the back soil 22, and the like are determined. As a result, the earth pressure is reduced
1 to stabilize the earth retaining wall 21 to earth pressure by the pull-out resistance force of the reinforcing body 23 from the soil 22 behind the soil, thus stably constructing the reinforcing earth structure 20;
It forms a stable slope.

The internal stability study described above includes study on the fracture of the reinforcing body 23, study on the pull-out of the reinforcing body 23 from the back soil 22, and any slip surface across the area reinforced by the reinforcing body (an example is shown in FIG. 2). (Illustration) 63, and the like. In addition, the above-mentioned external stability study shows that the reinforcement 2
The area reinforced by 3 is regarded as a pseudo retaining wall, and the sliding, overturning, and supporting capacity thereof are examined, and the slip failure including the foundation ground (on-site ground 40) is examined. Here, instead of examining the bearing capacity, an examination may be made on settlement of the foundation ground.

The above-mentioned stability study is based on the consideration that the retaining wall 21 and the reinforcing body 23
This is a stable study on the premise that the connection between the crushed stone 33 and the reinforcing body 23 is interlocking effect as in the present invention.
In the configuration that connects the reinforcement member 3 with the reinforcement member 3, it is necessary to study the pull-out of the reinforcing body 23 from the retaining wall 21. As an example of this study, the study performed by the present inventors is described below.

FIG. 10 is a cross-sectional view schematically showing the reinforcing soil structure 20 in a simplified manner. The reinforced soil structure 20 is constructed by the reinforced earth wall construction method using the earth retaining blocks 25 and 26 and the reinforcing body 23 as described above, and the reinforcing body 23 is sandwiched between the earth retaining blocks 25 and 26 to form the reinforcing body. Soil block 25, 2 containing 23 and crushed stone 33
6, the retaining wall 21 and the reinforcing member 23 are connected. If the reinforced soil structure 20 is stable, the tensile force P (tf /
m) and the resistance R acting between the reinforcing body 23 and the retaining wall 21
(Tf / m). Here, the tensile force P is a force generated when the earth pressure acts on the earth retaining wall 21 and the reinforcement 23 receives the pull-out resistance from the back soil 22. The resistance R is an interlocking effect between the reinforcing member 23 and the crushed stone 33, and is a force obtained by adding a frictional resistance between the retaining blocks 25 and 26 and the reinforcing member 23.

Therefore, as shown in the plan view of FIG. 11 (1) and the front view of FIG. 11 (2), a part of the non-planting block 25 has the same shape and the same material as the non-planting block 25, and is pulled out using the test block 65. A test was performed, and the connection strength between the retaining wall 21 and the reinforcing member 23 was examined based on the test results. The test was performed using the side view of FIG. 12 (1) and FIG. 12 (2).
As shown in the plan view of FIG.
6 is a structure 70 containing a crushed stone 67 for testing.
The test reinforcing body 68 was pulled out with the upper load σ ^B applied across the test reinforcing body 68. FIG. 12 (2)
Shows a state in which the upper test block 65 is removed.

The test conditions will be described in detail. The test block 65 has the same shape as a part of the central part in the width direction of the non-planting block 25, and has a width W10 of 300 mm.
The depth D10 is 270 mm and the height H10 is 250
mm, and is a rectangular tubular block in which a through-hole 66 similar to the through-hole 27a of the non-planting block 25 is formed.
More specifically, the test reinforcing body 68 is formed of a material having a tensile strength of 15 tf per 1 m in width, the width W11 is 300 mm, and the depth L is the same as the reinforcing body 23.
11 is 800 mm. The crushed stone 67 for testing is a crushed stone (crusher run) having a particle size of 25 mm or less, similar to the crushed stone 33, and was compacted and accommodated so as to have a volume weight of about 1.85 tf / m ² . The pull-out speed V of the test reinforcing body 68 is 1 mm / min toward the rear. The vertical load σ ^B is 4.0 tf / m ² , 7.5 tf / m ² , 14.4 t in consideration of the construction height (filling height) of the reinforced soil structure 20.
f / m ² , 21.3 tf / m ² , 28.3 tf / m ² and 35.0 tf / m ² .

Table 1 shows the results of the pull-out test performed under the above conditions.

[0057]

[Table 1]

Here, the maximum withdrawal force L is the largest force (load) applied to the test reinforcement immediately before the test reinforcement 68 is pulled out of the test block 65,
The maximum pull-out resistance R is a value obtained by converting the maximum pull-out force L into a force per meter in width. As can be seen from the test results, the maximum pull-out resistance R changes substantially in proportion to the change in the vertical load.

The maximum pull-out resistance R can be expressed by the following equation (1).

[0060] R = 2 (c * + σ B tanφ *) × L e ... (1) where, c * is an adhesive strength of the apparent generated between the structure 70 and the test reinforcement 68 , Φ * are the components 7
This is an apparent angle of friction generated between 0 and the test reinforcement 68. Further, σ ^B is a vertical load (tf / m ² ) by the component 70 acting on the test reinforcing member 68, and Le
Is the fixing length (m) of the test reinforcing member 68, and thus the length sandwiched between the components 70, and is 270 in the present test.
mm.

If c * + σ ^B tan φ * = τ, then:
The above equation (1) can be transformed as the following equation (2).

Τ = (R / 0.54) (2) Here, τ is a pull-out load, and the test reinforcement 68 is sandwiched by the components 70 over an area of 1 m 2, and the test reinforcement is When applied to the body 68, the load is such that the test reinforcing body 68 is pulled out from between the components 70.

FIG. 13 is a graph showing the pulling load τ. The horizontal axis indicates the vertical load σ ^B (tf / m ² ), and the vertical axis indicates the pull-out load τ (tf / m ² ). Each point 71 in FIG. 13 indicates a pulling load τ obtained from the measured value in the test by the above equation (2), and a solid line 72 indicates a drawing load approximated on the graph based on the pulling load τ obtained from the measured value. The relationship between the load τ and the vertical load σ ^B is shown by a broken line 73.
Shows the relationship between the pull-out load τ and the vertical load σ ^B that are approximated on the graph from the viewpoint of safety. The approximate expression of the relationship approximated on the graph as indicated by the solid line 72 is, from the slope and intercept, τ = c * + σ ^B tan φ * = 9.63 + 0.3237σ ^B = 9.63 + σ ^B tan17. 9 ° (tf / m ² ) (3) As is clear from FIG. 12, since the measured values are varied, it is considered on the safety side when adopting the stability calculation of the retaining wall 21 and the reinforcing member 23 so that no pull-out occurs in all the measured values. Therefore, when approximation is made so as to satisfy the stability, the result is indicated by a broken line 73.
The approximate expression of the relationship shown by the broken line 73 is, from the slope and intercept, τ = c * + σ ^B tan φ * = 8.12 + 0.3237σ ^B = 8.12 + σ ^B tan 17.9 ° (tf / m ² ) (4)

As described above, based on the pull-out load τ obtained by the equation (4), when examining the pull-out of the reinforcing member 23 from the retaining wall 21, it is necessary to prevent the reinforcing member 23 from being pulled out from the retaining wall 21. Needs to satisfy the following equation (5).

F _S × (σ × K _A × ΔH) ≦ 2 × (C * + σ ^B tan φ *) × L _e × F (5) where F _S is a safety factor against pull-out, and σ is ,
The vertical stress (tf / m ² ) due to the weight of the back soil 22 acting on the reinforcing member 23, and ΔH is the vertical spacing of the reinforcing member 23. K _A is the dynamic earth pressure coefficient,
F is the laying ratio of the reinforcing member 23.

The case where the back soil 22 has a friction angle φ of 30 ° and a unit volume weight γ of 1.9 tf / m ³ will be discussed below. The average unit volume weight γ of the retaining wall 21 made of the retaining blocks 25 and 26 and the crushed stone 33.
^B is set to 2.059 tf / m ³ . The relationship between the vertical load σ ^B and the vertical stress σ is as follows: σ ^B /σ=2.059/1.9=1.0837 (6) Safety factor F _S = 2.0, arrangement interval ΔH = 0.5,
Active earth pressure coefficient K _A = 0.333 (friction angle φ of back soil 22)
= 30 °) and the laying rate F = 0.833, and the other variables are the same as the above-mentioned test. 0.5 ≦ 0.54 (8.12 + 0.3237 × 1.0837 × σ) × 0.833 (7)

The vertical stress σ that satisfies the equation (7) is as follows: σ ≦ 20.83 (tf / m ² ) (8) Based on this, the pull-out of the reinforcing member 23 from the retaining wall 21 occurs. When the embankment height is not determined, that is, the height (vertical dimension) of the back soil 22 provided above the reinforcing member 23 is calculated as 20.83 ÷ 0.75 = 11. Therefore, if the embankment height is 11 m or less, When the reinforcing member 23 is pulled out from the retaining wall 21, a predetermined safety factor F _S , here, F _S = 2.0 is satisfied.

In the actual design, the safety factor F _S is calculated from the above equation (5).

[0069]

(Equation 1)

If ΔH is determined so that the safety factor F _S represented by the equation (9) is equal to or more than a predetermined value, the reinforcing member 23 is moved from the earth retaining wall 21 at the predetermined safety factor. It can be prevented from being pulled out. The safety factor F _S is
For example, the value is always 2.0 or more at all times, and 1.2 or more during an earthquake.

FIG. 14 shows that the friction angle φ of the back soil 22 is 25 °.
It is a graph showing a suitable arrangement interval ΔH when is,
FIG. 15 is a graph showing a suitable arrangement interval ΔH when the friction angle φ of the back soil 22 is 30 °, and FIG. 16 is a graph showing a preferable arrangement when the friction angle φ of the back soil 22 is 35 °. FIG. 17 is a graph showing an interval ΔH, and FIG. 17 is a graph showing a preferable arrangement interval ΔH when the friction angle φ of the back soil 22 is 40 °. 14 to 17, the horizontal axis represents the depth from the top end of the reinforced soil structure 20, that is, the depth of the back soil, and the vertical axis represents the arrangement interval satisfying the safety factor F _S = 2.0. Indicates the maximum value of ΔH. In addition, the vertical axis is shown in multiple stages every 0.25 m because the height of the non-planting block 25 is 250 mm.

In detail, taking the case where the friction angle φ of FIG. 14 is 25 ° as an example, in the region having a depth of 3 m or less from the top end, the arrangement interval ΔH is smaller than the 1 m interval. The reinforcing members 23 may be arranged every four steps of the block 25, and the depth from the top end exceeds 3 m and is about 4.5 m.
In the following areas, the arrangement interval ΔH smaller than the 0.75 m interval, and therefore at least three of the non-planting blocks 25
What is necessary is just to arrange for every step. A detailed description of the case where the depth from the top end exceeds about 4.5 m is omitted, but if the arrangement is performed at an interval smaller than the arrangement interval ΔH shown in the graph, a predetermined safety factor F _S = 2.0, the retaining wall 21 and the reinforcing member can be connected. The friction angles φ shown in FIGS. 15 to 17 are 30 °, 35 ° and 45 °
The same applies to the case of.

FIG. 18 is a graph showing the difference in the pulling load τ depending on the presence or absence of the crushed stone material 33. The horizontal axis is the vertical load σB
And the vertical axis indicates the pull-out strength. The present inventors studied the difference in the pull-out strength τ depending on the presence or absence of the quarry 33 using the test block 65 and the like separately from the above test. The pullout strength τ when using the quarry 33 is obtained by performing a test under the same conditions as the above-described test and using the above equation (2).
Except not using the crushed stone 67 for a test, the test was performed on the same conditions and it calculated | required by said Formula (2).

The solid line 75 in FIG. 18 shows the result when the quarry 33 is provided, and the broken line 76 shows the result when the quarry 33 is not provided. As is clear from the result, when the quarry material 33 is provided, the pulling strength can be significantly increased as compared with the case where the quarry material 33 is not provided.

FIG. 19 is a graph showing the ratio of the pulling load τ without the quarry 33 to the pulling load τ with the quarry 33. The horizontal axis shows the vertical load,
The vertical axis indicates the ratio. Ratio represented by the vertical axis (pulling strength without crushed stone 33 / pulling strength with quarry)
Is the ratio of the pull-out strength when sandwiched only by the test block 65 out of the pull-out strength when sandwiched between the components 70, and therefore, the earth retaining block 25 of the pull-out strength with respect to the earth retaining wall 21 of the reinforcing member 23. , 26 correspond to the ratio of the pull-out strength obtained by the frictional force.

As can be seen from FIG. 19, as the vertical load increases, the pull-out strength of only the block 65, and hence the ratio of the pull-out strength of the earth retaining blocks 25 and 26 alone, increases, but the vertical load σ ^B is 30 tf / m. ^When it is ² or less, the ratio of the pull-out strength only by the block is half (50%) or less. As described above, the quarry 33 can be used to withstand a large pulling load by a so-called interlocking effect. In addition, the mechanical locking force based on the interlocking effect hardly decreases even if moisture adheres to the crushed stone material and the reinforcing body due to rainfall, etc. It is suitable.

Further, by providing the planting block 26, the soil 22 can be inserted into the planting hole 47 as shown by a virtual line in FIG.
a can be accommodated, and the plant 80 can be planted in the earth and sand 22a, and the slope (wall surface) can be greened. The planting hole 47 penetrates in the front-rear direction X1, X2, and
a and the back soil 22 are in a connected state, so to speak, the plant 80 can absorb moisture and the like by using not only the small soil 22 a in the planting hole 47 but also the back soil 22. Can grow easily. In addition, a portion of the planting block 26 facing the planting hole 47 from below has a portion above the front X1 protruding upward, thereby preventing the earth and sand 22 from spilling down.

FIG. 20 is a simplified plan view showing a state where the non-planting blocks 25 are arranged in an S-shape. As described above, in the non-planting block 25, the width W1a of the rear wall 42 is smaller than the width W1 of the front wall 41 (W1> W1a).
When they are arranged side by side, and thus arranged side by side, the front walls 41 are arranged so as to be convexly curved forward (upward in FIG. 2) in a state where the front walls 41 are in contact with each other, and thus there is no gap. be able to. Therefore, as shown in FIG. 20, the non-planting blocks 25 can also be suitably arranged in an S-shape corresponding to the laid road or the like. Of course, even if one of the non-planting blocks 25 is replaced with the planting block 26, the non-planting blocks can be similarly arranged in an S shape unless the planting blocks are arranged.

FIG. 21 is a sectional view showing a part of a reinforcing earth structure 20A according to another embodiment of the present invention, and FIG.
It is a perspective view showing a part of reinforcement body 23A of reinforcement earth structure 20A. In FIG. 22, the thickness of the reinforcing body 23A is omitted and simplified. Reinforced soil structure 20 of the present embodiment
A is the reinforced earth structure 2 of the embodiment shown in FIGS.
0, and only different parts will be described. In the reinforced soil structure 20 shown in FIGS. 1 to 20, the connecting portion 36 for connecting the reinforcing body 23 to the retaining wall 21 is arranged horizontally like the buried portion 35, and the non-planting block 25.
However, in the reinforcing soil structure 20A of the present embodiment, the connecting portion 36A of the reinforcing body 23A is wound around a part of the retaining wall 21 and folded back, and a portion near the front end thereof is provided. Is inserted into the back soil 22.

More specifically, the connecting portion 36A is connected to the through hole 2 of the non-planting block 25 in the left-right direction Y1 and Y2.
A first portion 90 corresponding to 7a to 27c and a second portion 91 corresponding to the connection plates 43a and 43b of the non-planting block 25
And The connecting portion 36A is configured such that the first portion 90 and the second portion 91 are in the front-back direction X1 at least in a portion opposite to the embedded portion 35 than a portion facing (sandwiched) the back plate 42 of the non-planting block 25. , X2, and the first
The portion 90 is formed longer than the second portion 91.

The first portion 90 is inserted forwardly between the non-planting blocks 25 vertically adjacent to each other in connection with the buried portion 35,
A rising portion 191 that is bent upward on the front side of the back plate 42 and penetrates the through holes 27a to 27c upward along the surface of the back plate 42, and further folded back from between the upper non-planting block 25. Folded portion 192 and back plate 4
2, the falling portion 19 bent downward at the rear side and extending along the surface of the back plate 42 to near the upper surface of the embedded portion 35.
3 and a rear extending portion 194 that is bent rearward and extends rearward along the buried portion 35. The second portion 91 is inserted between the connecting plates 43a and 43b of the non-planting block 25 vertically adjacent to the buried portion 35 and extends to near the front end of each non-planting block 25.

As described above, in the present embodiment, the reinforcing member 23
A, the first portion 90 is inserted through the through holes 27a to 27c, is wound around the back plate 42, is folded, and
As well as in the through holes 27a to 27c,
The quarry 33 is contacted. As described above, in the present embodiment, the connecting portion 36A of the reinforcing body 23A is wound around a part of the retaining wall 21 and folded back, and a portion closer to the tip is inserted into the back soil 22. Not only the interlocking effect due to the contact of the crushed stone material 33 but also the bearing pressure resistance between the back soil 22 and the portion 194 near the tip inserted into the back soil 22 is improved. It can be used as a force to prevent the slipping out of the wall 212, and the reinforcing body 23A can be firmly locked to the retaining wall 21 and connected more firmly.

FIG. 23 is a graph showing the difference in the pulling load τ between the reinforced soil structure 20 and the reinforced soil structure 20A.
The horizontal axis indicates the above-described vertical load, and the vertical axis indicates the above-described pulling load τ. The solid line 95 in FIG. 21 shows the relationship between the vertical load sigma ^B and pulling load τ in reinforced soil structure 20, a broken line 96 shows a relationship between the vertical load sigma ^B and pulling load τ in reinforced soil structure 20A . As is clear from this graph, if the vertical load σ ^B is the same, the pull-out load τ in the reinforced soil structure 20A is larger than the pull-out strength τ in the reinforced soil structure 20. The vertical load σ ^B required to obtain the same pulling load τ is smaller than that of the earth structure 20. As described above, the present inventor has confirmed that the present embodiment can increase the pull-out resistance from the retaining wall 21 as compared with the embodiment of FIGS. 1 to 20. Therefore, even when the vertical load σ ^B due to the retaining wall 21 becomes small, such as during an earthquake, the retaining wall 21 and the reinforcing member 23A
Can be reliably maintained. In addition, connecting part 3
The pull-out resistance of the retaining wall 21 can be changed by changing the length inserted into the soil 22 behind the 6A.

As described above, the first portion 90 is formed in each through hole 2.
Instead of inserting 7a-27c upward, it may be folded back so as to be inserted downward. Therefore, one of the vertically retaining soil blocks 25 and 26 may be the non-planting block 25, and the non-planting block 2
Retaining wall 21 configured to stack 5 and planting block 26
And the reinforcing body 23A can be connected.

FIG. 24 is a sectional view showing a part of a reinforcing earth structure 20B according to another embodiment of the present invention.
It is a perspective view showing a part of reinforcement body 23B of reinforcement earth structure 20B. In FIG. 25, the thickness of the reinforcing body 23B is omitted and simplified. Reinforced soil structure 20 of the present embodiment
B is the reinforced soil structure 2 of the embodiment shown in FIGS.
0, and only different parts will be described. In the reinforced soil structure 20 shown in FIGS. 1 to 20, the connecting portion 36 for connecting the reinforcing body 23 to the retaining wall 21 is arranged horizontally like the buried portion 35, and the non-planting block 25.
However, in the reinforced soil structure 20B of the present embodiment, the connecting portion 36B of the reinforcing body 23B is wound around a part of the retaining wall 21 and folded back, and a portion closer to the distal end portion is provided. Is inserted into the back soil 22.

More specifically, the connecting portion 36B is connected to the through hole 2 of the non-planting block 25 in the left-right direction Y1, Y2.
The first portion 90B corresponding to 7a to 27c and the second portion 9 corresponding to the connecting plates 43a and 43b of the non-planting block 25.
1B. The connecting portion 36 </ b> B is formed at least in the first portion 9 at a portion opposite to the embedded portion 35 than a portion facing (sandwiched) the back plate 42 of the non-planting block 25.
0B and the second portion 91B are separated, and the first portion 90B
Are formed longer than the second portion 91B.

The first portion 90B is inserted forward between the non-planting blocks 25 vertically adjacent to the buried portion 35, and is bent upward at the front side of the back plate 42 to be bent upward.
Rising portion 191 that penetrates through holes 27a to 27c upward along the surface of the non-planting block 25
A folded portion 192 that is folded back from between the rear portion 1 and a rear extending portion 1 that extends horizontally rearward and is inserted into the back soil 22.
94. The second portion 91B is inserted between the non-planting blocks 25 vertically adjacent to each other in connection with the embedded portion 35,
Each non-planting block 25 extends to near the front end.

As described above, in the present embodiment, the reinforcing member 23
B, the first portion 90B is inserted through the through holes 27a to 27c, is wound around the back plate 42, is folded, and
2 and is brought into contact with the quarry 33 in the through holes 27a to 27c. Therefore, the same effects as those of the reinforced soil structure 20A of the embodiment shown in FIGS. 21 and 22 can be achieved.

The first portion 90B may be folded back so as to be inserted downward instead of being inserted upward through the through holes 27a to 27c as described above. Therefore, the retaining wall 21 configured to stack the non-planting block 25 and the planting block 26 can be connected to the reinforcing member 23B.

FIG. 26 is a sectional view showing a part of a reinforced soil structure 20C according to another embodiment of the present invention, and FIG.
It is a perspective view showing a part of reinforcement body 23C of reinforcement earth structure 20C. In FIG. 27, the thickness of the reinforcing body 23C is omitted and simplified. Reinforced soil structure 20 of the present embodiment
C is the reinforced soil structure 2 of the embodiment shown in FIGS.
0, and only different parts will be described. In the reinforced soil structure 20 shown in FIGS. 1 to 20, the connecting portion 36 for connecting the reinforcing body 23 to the retaining wall 21 is arranged horizontally like the buried portion 35, and the non-planting block 25.
However, in the reinforcing soil structure 20C of the present embodiment, the connecting portion 36C of the reinforcing member 23C is wound around a part of the retaining wall 21 and folded back, and a portion near the tip end thereof is provided. Is inserted into the back soil 22.

More specifically, the connecting portion 36C is connected to the through hole 2 of the non-planting block 25 in the left-right direction Y1, Y2.
The first portion 90C corresponding to 7a to 27c and the second portion 9 corresponding to the connecting plates 43a and 43b of the non-planting block 25.
1C. The connecting portion 36C is horizontally disposed between the blocks 25 up to the vicinity of the front plate 41 of the non-planting block 25, similarly to the embodiment shown in FIGS. At least in a portion on the opposite side of the buried portion 35 from the vicinity of the front plate 41, the first portion 90C and the second portion 91C are separated, and the first portion 90C is formed longer than the second portion 91C. .

The first portion 90C is inserted forwardly between the non-planting blocks 25 vertically adjacent to the buried portion 35, and extends horizontally to the vicinity of the front plate 41.
9 and the front plate 4 which is bent upward on the rear side of the front plate 41
The upper non-planting block 25 is folded back between a rising portion 195 that penetrates the through holes 27a to 27c upward along the surface of the first non-planting block 25 and the upper non-planting block 25.
A falling portion 197 that is bent downward at the rear side of the back plate 42 and extends along the surface of the back plate 42 to near the upper surface of the embedded portion 35;
And a rear extending portion 198 that is bent rearward and extends rearward along the embedded portion 35. The second portion 91 </ b> C is connected to the non-planting block 25 vertically adjacent to the embedded portion 35.
The non-planting block 25 is inserted between them and extends to near the front end of each non-planting block 25.

As described above, in the present embodiment, the reinforcing member 23
C is a back plate 4 in which the first portion 90C is inserted through the through holes 27a to 27c to accommodate the quarry 33 therein.
2 and folded back and inserted into the back soil 22, and in the through holes 27a to 27c, the quarry 33
Is contacted. Therefore, as in the case of the reinforced soil structure 20A of the embodiment shown in FIGS. 19 and 20, the connection can be made, the contact area with the quarry 33 can be increased, and the pulling resistance to the larger retaining wall 21 can be increased. Can be obtained.

Further, the first portion 90C may be folded back so as to be inserted downward instead of being inserted upward through the through holes 27a to 27c as described above. Therefore, the retaining wall 21 configured to stack the non-planting block 25 and the planting block 26 and the reinforcing member 23C can be connected.

FIG. 28 is a sectional view showing a part of a reinforcing earth structure 20D according to another embodiment of the present invention, and FIG.
It is a perspective view showing a part of reinforcement body 23D of reinforcement earth structure 20D. In FIG. 29, the thickness of the reinforcing body 23D is omitted and simplified. Reinforced soil structure 20 of the present embodiment
D is the reinforced soil structure 2 of the embodiment shown in FIGS.
0, and only different parts will be described. In the reinforced soil structure 20 shown in FIGS. 1 to 20, the connecting portion 36 for connecting the reinforcing body 23 to the retaining wall 21 is arranged horizontally like the buried portion 35, and the non-planting block 25.
However, in the reinforcing soil structure 20D of the present embodiment, the connecting portion 36D of the reinforcing body 23D is wound around a part of the retaining wall 21 and folded back, and a portion near the tip end thereof is provided. Is inserted into the back soil 22.

More specifically, the connecting portion 36D is connected to the through hole 2 of the non-planting block 25 in the left-right direction Y1 and Y2.
The first portion 90D corresponding to 7a to 27c and the second portion 9 corresponding to the connecting plates 43a and 43b of the non-planting block 25.
1D. The connecting portion 36D is horizontally arranged between the non-planting blocks 25 up to the vicinity of the front plate 41 of the non-planting block 25, similarly to the embodiment shown in FIGS.
At least a portion of the first portion 90D and a second portion 91D opposite to the embedded portion 35 with respect to the vicinity of the front plate 41.
And the first portion 90D is formed longer than the second portion 91D.

The first portion 90D is inserted forward between the non-planting blocks 25 vertically adjacent to the buried portion 35 and extends horizontally to the vicinity of the front plate 40.
9 and the front plate 4 which is bent upward on the rear side of the front plate 41
The upper non-planting block 25 is folded back between a rising portion 195 that penetrates the through holes 27a to 27c upward along the surface of the first non-planting block 25 and the upper non-planting block 25.
And a rearwardly extending portion 203 which extends horizontally further rearward and is inserted into the back soil 22.
And The second portion 91 </ b> D is inserted between the non-planting blocks 25 vertically adjacent to each other in the buried portion 35, and extends to near the front end of each non-planting block 25.

As described above, in the present embodiment, the reinforcing member 23
D is a back plate 4 in which the first portion 90D is inserted through the through holes 27a to 27c to accommodate the quarry 33 therein.
2 and folded back and inserted into the back soil 22, and in the through holes 27a to 27c, the quarry 33
Is contacted. Therefore, the same effects as those of the reinforced soil structure 20A of the embodiment shown in FIGS. 21 and 22 can be achieved. Also, the first portion 90D replaces the through holes 27a to 27c upward as described above,
It may be folded back so as to be inserted downward. Therefore, the retaining wall 21 configured to stack the non-planting block 25 and the planting block 26 and the reinforcing member 23D can be connected.

FIG. 30 is a sectional view showing a part of a reinforcing earth structure 20E according to another embodiment of the present invention, and FIG.
It is a perspective view showing a part of reinforcement 23E of reinforcement earth structure 20E. In FIG. 31, the thickness of the reinforcing body 23E is omitted and simplified. Reinforced soil structure 20 of the present embodiment
E is the reinforced soil structure 2 of the embodiment shown in FIGS.
0, and only different parts will be described. In the present embodiment, the connecting portion 36E of the reinforcing body 23E
It is configured to increase the contact area between the quarry 33 and the quarry 33. More specifically, the connecting portion 36E includes the left and right directions Y1,
Regarding Y2, the through holes 27a to 2 of the non-planting block 25
7c and a non-planting block 25
And a second portion 91E corresponding to the connection plates 43a and 43b of the first portion. The connecting portion 36E is horizontally arranged between the blocks 25 up to the vicinity of the front plate 41 of the non-planting block 25, similarly to the embodiment shown in FIGS. At least in a portion on the opposite side of the buried portion 35 from the vicinity of the front plate 41, the first portion 90E and the second portion 91E are separated, and the first portion 90E is formed longer than the second portion 91E. .

The first portion 90E is inserted forward between the non-planting blocks 25 vertically adjacent to the buried portion 35, extends horizontally to the vicinity of the front plate 40, and bends upward at the rear side of the front plate 41. Then, the front plate 41 is inserted upward into the through holes 27a to 27c along the surface up to the middle part in the vertical direction of the front plate 41. The second portion 91 </ b> E is inserted between the non-planting blocks 25 vertically adjacent to each other so as to be continuous with the embedded portion 35, and extends to near the front end of each of the non-planting blocks 25.

As described above, in the present embodiment, the reinforcing member 23
E indicates that the first portion 90E is close to the front plate 41 and that each through hole 2
7a to 27c, and are sandwiched between crushed stones in the recesses of the vertically adjacent blocks 25 as in the embodiment of FIGS. 1 to 20, and additionally, through holes 27a to 27c.
And is also brought into contact with the quarry 33.
Therefore, the pull-out strength can be increased as compared with the reinforced soil structure 20 of the embodiment shown in FIGS. In addition, the first portion 90E has the through holes 27a to 27e as described above.
7c may be folded downward instead of being inserted upward. Therefore, the retaining wall 2 configured to stack the non-planting block 25 and the planting block 26
1 and the reinforcing member 23E can be connected.

FIG. 32 is a sectional view showing a part of a reinforcing earth structure 20F according to another embodiment of the present invention.
It is a perspective view showing a part of reinforcement body 23F of reinforcement earth structure 20F. In FIG. 33, the thickness of the reinforcing body 23F is omitted and simplified. Reinforced soil structure 20 of the present embodiment
F is the reinforced earth structure 2 of the embodiment shown in FIGS.
0, and only different parts will be described. In the present embodiment, the connecting portion 36F of the reinforcing body 23F
It is configured to increase the contact area between the quarry 33 and the quarry 33. More specifically, the non-planting block 2 is provided on the retaining block provided so as to be placed above the reinforcing body 23F.
5 is provided with a non-planting block 25F. The non-planting block 25F is similar to the non-planting block 25, except that the connecting plates 43a and 43b have the front plate 4
This is a point that a concave groove 99 is formed at one end nearer to the front, and that the front plate 41 projects downward from the remaining portion by a dimension ΔH corresponding to the thickness of the reinforcing member. Groove 99
Are opened at the lower ends of the connecting plates 43a and 43b, and are formed up to the middle part in the vertical direction.

The reinforcing body 23F is inserted forward between the non-planting blocks 25 vertically adjacent to the buried portion 35,
It extends horizontally to the vicinity of the front plate 40, and is bent upward at the rear side of the front plate 41 to a halfway portion of the front plate 41 in the vertical direction.
It extends upward along the surface. At this time, the horizontal direction Y
1, the first corresponding to the through holes 27a to 27c with respect to Y2.
The portion 90F is inserted upward through the through holes 27a to 27c, and the second portion 91F corresponding to the connecting plates 43a and 43b.
Is inserted into the groove 99.

As described above, in the present embodiment, the reinforcing member 23
F indicates that the first portion 90F is close to the front plate 41 and that each of the through holes 2
7a to 27c, and are sandwiched between crushed stones in the recesses of the vertically adjacent blocks 25 as in the embodiment of FIGS. 1 to 20, and additionally, through holes 27a to 27c.
And is also brought into contact with the quarry 33.
Therefore, the pull-out strength can be increased as compared with the reinforced soil structure 20 of the embodiment shown in FIGS. In addition, the first portion 90F has the through holes 27a to 2
7c may be folded downward instead of being inserted upward. Therefore, the retaining wall 2 configured to stack the non-planting block 25 and the planting block 26
1 and the reinforcing member 23F.

In each of the above embodiments, the embodiment shown in FIGS. 26 and 27 can maximize the pull-out resistance. In the case of a configuration as shown in FIGS. 21 to 31, first portions 90 and 90B to 90B
It is preferable to insert D through the through holes 27a to 27c with the upward direction. In this case, since the reinforcing soil structure is constructed upward, the work of laying the reinforcing bodies 23A to 23D becomes easy. .

The present invention is not limited to the above-described embodiment, but can be modified within the scope of the present invention. For example, when constructing one reinforced soil structure, each of the reinforced bodies 23, 2 having a different connection structure as described above.
3A to 23D may be appropriately selected and used in combination. Alternatively, the earth retaining wall may be formed by stacking using only one of the non-planting block 25 and the planting block 26.

[0107]

According to the present invention, the retaining wall is formed by stacking a plurality of retaining blocks, and each retaining block has:
An upper recess and a lower recess are formed to accommodate crushed stone. The back soil is accommodated behind such a retaining wall, and in the state where the buried portion is buried in the back soil, a connecting portion connected to an end of the buried portion near the retaining wall is provided between the retaining blocks vertically adjacent to each other. A mesh sheet-like reinforcement is inserted into the wall. The crushed stone material is brought into contact with the connecting portion of the reinforcing member inserted between the retaining blocks, and the crushed stone material partially fits into the mesh of the connecting portion of the reinforcing member in the form of a net sheet. The reinforcing body is locked to the retaining wall and connected by a so-called interlocking effect utilizing mechanical engagement between the connecting portion and the crushed stone. As described above, the retaining wall and the reinforcing body are connected by the interlocking effect between the reinforcing body and the crushed stone material in the retaining wall, and the configuration in which the protrusion is inserted into the through hole and locked as in the related art, and the fitting is performed. As compared with the configuration in which the fixing jig is fitted and locked in the hole, the locking jig can be locked to the retaining wall with a wider locking area. Therefore, it is possible to prevent a large local force from acting on the reinforcement, and prevent the reinforcement from being damaged. Moreover, rather than simply sandwiching the reinforcing body between the retaining blocks, the crushed stone is stored in the retaining block, and the crushed stone is fitted into the mesh of the reinforcing body so that the reinforcing body is not pulled out of the retaining wall. A mechanical locking force can be obtained. In addition, the mechanical locking force based on the interlocking effect hardly decreases even if moisture adheres to the crushed stone material and the reinforcing body due to rainfall, etc. It is suitable.

According to the present invention, the connecting portion of the reinforcing member is
Since it is inserted into the crushed stone, the crushed stone is in contact with the connecting portion of the reinforcing member from both sides in the thickness direction, and a larger interlocking effect can be obtained as compared with the case where the crushed stone is contacted from one side, The reinforcing body can be firmly locked to the retaining wall and connected more firmly.

According to the present invention, the connecting portion of the reinforcing member is
It is wound around a part of the retaining wall and folded back, and the portion near the tip is inserted into the back soil, so that the connecting portion inserted between the retaining blocks is interlocking with the crushed stone material described above. Not only the effect, but also the supporting pressure between the back soil near the tip that is inserted into the back soil can be used as a force to prevent it from falling out of the retaining wall, reinforcing The body can be firmly locked to the retaining wall and connected more firmly.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a part of a reinforcing road structure 20 according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view schematically showing a reinforcing soil structure 20.

FIG. 3 is a front view showing a part of the reinforcing soil structure 20.

FIG. 4 is a perspective view showing an internal structure of the reinforcing soil structure 20.

FIG. 5 is a diagram showing a non-planting block 25.

FIG. 6 is a perspective view showing a state where the retaining blocks 25 and 26 are stacked.

FIG. 7 is a view showing a planting block 26;

FIG. 8 is a plan view showing a part of a reinforcing member 23.

FIG. 9 is a diagram for explaining a construction procedure of the reinforcing soil structure 20.

FIG. 10 is a diagram schematically showing a simplified soil structure 20;

11 is a diagram showing a test block 65. FIG.

FIG. 12 is a diagram for explaining conditions of a pull-out test.

FIG. 13 is a graph showing a pulling load τ.

FIG. 14 shows that the friction angle φ of the back soil 22 based on the test results is 2
It is a graph which shows the suitable arrangement | sequence space | interval of the reinforcement body 23 when it is 5 degrees.

FIG. 15 shows that the friction angle φ of the back soil 22 based on the test results is 3
It is a graph which shows the suitable arrangement | sequence space | interval of the reinforcement body 23 in case of 0 degree.

FIG. 16 shows that the friction angle φ of the back soil 22 based on the test results is 3
It is a graph which shows the suitable arrangement | sequence space | interval of the reinforcement body 23 when it is 5 degrees.

FIG. 17 shows that the friction angle φ of the back soil 22 based on the test results is 4
It is a graph which shows the suitable arrangement | sequence space | interval of the reinforcement body 23 in case of 0 degree.

FIG. 18 is a graph showing a difference in a pulling load τ depending on the presence or absence of a crushed stone material.

FIG. 19 is a graph showing a ratio of a pulling load without a crushed stone to a pulling load with a crushed stone.

FIG. 20 is a plan view schematically showing a state where non-planting blocks 25 are arranged in an S shape.

FIG. 21 is a reinforced soil structure 20 according to another embodiment of the present invention.
It is sectional drawing which shows a part of A.

FIG. 22 is a perspective view showing a part of a reinforcing body 23A of the reinforcing soil structure 20A.

FIG. 23 is a graph showing a difference in pull-out load between the reinforced soil structure 20 and the reinforced soil structure 20A.

FIG. 24 is a cross-sectional view showing a part of a reinforced soil structure 20B according to still another embodiment of the present invention.

FIG. 25 is a perspective view showing a part of a reinforcing member 23B of the reinforcing soil structure 20B.

FIG. 26 is a cross-sectional view showing a part of a reinforcing earth structure 20C according to still another embodiment of the present invention.

FIG. 27 is a perspective view showing a part of a reinforcing member 23C of the reinforcing soil structure 20C.

FIG. 28 is a cross-sectional view showing a part of a reinforced soil structure 20D according to still another embodiment of the present invention.

FIG. 29 is a perspective view showing a part of a reinforcing member 23D of the reinforcing soil structure 20D.

FIG. 30 is a cross-sectional view showing a part of a reinforced soil structure 20E according to still another embodiment of the present invention.

FIG. 31 is a perspective view showing a part of a reinforcing body 23E of a reinforcing earth structure 20E.

FIG. 32 is a reinforced soil structure 20 according to another embodiment of the present invention.
It is sectional drawing which shows a part of F.

FIG. 33 is a perspective view showing a part of a reinforcing body 23F of the reinforcing soil structure 20F.

FIG. 34 is a perspective view showing a part of a reinforced earth structure 1 according to a conventional technique.

FIG. 35 is an exploded perspective view showing a part of a reinforced earth structure 10 according to another conventional technique.

[Explanation of symbols]

 20, 20A to 20F Reinforced soil structure 21 Soil wall 22 Back soil 23, 23A to 23F Reinforced body 25, 25a, 25b, 25F, 26 Soil block 27a to 27c Through hole 28a to 28c, 30a to 30c Upper recess 29a to 29c, 31a to 31c Lower recess 33 Stone crushed material 35 Buried part 36, 36A to 35F Connecting part

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Noriyo Ogawa 1-7-19 Nishihonmachi, Nishi-ku, Osaka-shi, Osaka Examiner in Geosystem Co., Ltd. Kazuhiko Yoshimura (56) References JP-A-11-190026 (JP, A (58) Fields surveyed (Int. Cl. ⁷ , DB name) E02D 29/02 303 E02D 17/18

Claims (8)

(57) [Claims] 1. A plurality of retaining blocks, each having an upper recess opening upward and a lower recess opening downward, are vertically stacked, and the upper and lower recesses of each of the retaining blocks are stacked. Earth retaining wall in which crushed stone is accommodated, back soil accommodated behind the earth retaining wall, buried part buried in the earth behind, and earth retaining block vertically adjacent to the end of the embedded part near the earth retaining wall A mesh sheet-like reinforcing member having a connection portion that is inserted into the retaining wall from between and has a contact portion with the crushed stone material, wherein the crushed stone material partially fits into the mesh of the reinforcing member, and the reinforcing member is connected to the retaining wall. And a reinforcing member for obtaining a large mechanical locking force so as not to be pulled out of the reinforcing soil structure. 2. The method according to claim 1, wherein at least one reinforcing member is provided, and among the contact surfaces of the vertically adjacent earth retaining blocks, there is a contact surface in which the reinforcing member is not inserted. And the reinforced soil structure. 3. The connecting portion of the reinforcing body is wound around a part of the retaining wall and folded back, and a portion closer to the front end portion is inserted into the back soil. The reinforced soil structure as described. 4. A reinforced soil structure as claimed in claim 1, wherein a part of the retaining block according to claim 1 comprises a vegetation block. 5. A retaining wall on which a plurality of retaining blocks are vertically stacked. Each retaining block includes a front plate 41, a rear plate 42 which is located rearward of the front plate 41 by X2, A retaining wall in which vertically extending through holes 27a to 27c are formed by connecting plates 43a and 43b extending in the directions X1 and X2 and connecting the front plate 41 and the rear plate 42; and (b) a rear plate of the retaining block. (C1) a buried portion 35 buried in the back soil, and (c2) a retaining portion of the buried portion 35. (C2-1) The first portion 90, which is a connecting portion 36A inserted into the retaining wall from between the retaining blocks vertically adjacent to the end near the wall, and (c2-1-1) In the through holes 27a to 27c, the back plate 4 of the retaining block A rising portion 191 standing amounting along the surface of the back plate 42 is bent upward at the front side of the back plate 42 from the bottom of, contiguous with (c2-1-2) rising portion 191, the backplate 4
And (c2-1-3) the folded portion 192, which is continuous with the folded portion 192,
2, a rising portion 193 that is bent downward on the rear side of the back plate 42 and extends along the surface of the back plate 42 to near the upper surface of the embedded portion 35, and (c2-1-4) a rising portion 193. , Back plate 4
(C2-2) a second portion 91 having a rear extending portion 194 extending into the back soil 22 along the buried portion 35 behind the second portion; The connecting plates 43a, 43 of the earthing block 25 which are divided in the front-rear direction X1, X2 and vertically adjacent to each other.
b having a second portion 91 inserted between b and extending in the front-rear direction X1, X2 to near the front end of the retaining block.
(D) the crushed stone 33 inserted into the through-holes 27a to 27c and fitted into the mesh of the rising portion 191 so that the reinforced stone 23A allows the reinforcement 23A to be retained by the earth retaining wall. A reinforced earth structure including such a crushed stone material 33 that obtains a large mechanical locking force so as not to be pulled out of the crushed stone material. 6. A retaining wall on which a plurality of retaining blocks are vertically stacked. Each retaining block includes a front plate 41, a rear plate 42 that is located rearward of the front plate 41 by X2, and A retaining wall in which vertically extending through holes 27a to 27c are formed by connecting plates 43a and 43b extending in the directions X1 and X2 and connecting the front plate 41 and the rear plate 42; and (b) a rear plate of the retaining block. (C1) a buried portion 35 buried in the back soil, and (c2) a retaining portion of the buried portion 35. (C2-1) The first portion 90, which is a connecting portion 36A inserted into the retaining wall from between the retaining blocks vertically adjacent to the end near the wall, and (c2-1-1) In the through holes 27a to 27c, the back plate 42 of the retaining block And (c2-1-2) a rising portion 191 which is bent upward from the bottom of the rear plate 42 on the front side of the rear plate 42 and rises along the surface of the rear plate 42.
And (c2-1-3) the folded portion 192, which is continuous with the folded portion 192,
(C2-2) a second portion 91 having a rear extending portion 194 extending into the rear soil 22 behind the second portion 91. The first portion 90 is in the front-rear direction X1, X2. The connection plates 43a, 43 of the earthing block 25 vertically separated and vertically adjacent
b having a second portion 91 inserted between b and extending in the front-rear direction X1, X2 to near the front end of the retaining block.
(D) the crushed stone 33 inserted into the through-holes 27a to 27c and fitted into the mesh of the rising portion 191 so that the reinforced stone 23A allows the reinforcement 23A to be retained by the earth retaining wall. A reinforced earth structure including such a crushed stone material 33 that obtains a large mechanical locking force so as not to be pulled out of the crushed stone material. 7. (a) A retaining wall on which a plurality of retaining blocks are vertically stacked, wherein each retaining block includes a front plate 41, a rear plate 42 that is X2 behind the front plate 41, and A retaining wall in which vertically extending through holes 27a to 27c are formed by connecting plates 43a and 43b extending in the directions X1 and X2 and connecting the front plate 41 and the rear plate 42; and (b) a rear plate of the retaining block. (C1) a buried portion 35 buried in the back soil, and (c2) a retaining portion of the buried portion 35. (C2-1) The first portion 90, which is a connecting portion 36A inserted into the retaining wall from between the retaining blocks vertically adjacent to the end near the wall, and (c2-1-1) In the through holes 27a to 27c, the back plate 42 of the retaining block And a front extending portion 199 extending from below the through holes 27a to 27c to the vicinity of the front plate 41. (c2-1-2) The front extending portion 199 is continuous with the front extending portion 199, and is bent upward at the rear side of the front plate 41. (C2-1-3) a rising portion 195 that rises along the surface of the front plate 41;
1, a folded portion 196 extending rearward on the through holes 27a to 27c and the back plate 42, and (c2-1-4) a folded portion 196,
(C2-1-5) a falling portion 197 that is bent downward from the top of the rear plate 42 on the rear side of the back plate 42 and extends along the surface of the back plate 42 to near the upper surface of the embedded portion 35; And back plate 4
(C2-2) a second portion 91 having a rear extending portion 198 extending rearward of the second portion 2 and extending into the back soil 22 along the buried portion 35; Are divided in the front-rear direction X1, X2, and the connecting plates 43a, 43 of the earthing block 25 vertically adjacent to each other.
b having a second portion 91 inserted between b and extending in the front-rear direction X1, X2 to near the front end of the retaining block.
A, and (d) the crushed stone material 33 inserted into the through holes 27a to 27c so as to fit into the mesh of the front extending portion 199, the rising portion 195, and the folded portion 196, A reinforced soil structure comprising such a crushed stone material 33 which obtains a large mechanical locking force so that the reinforcing body 23A is not pulled out of the retaining wall by the crushed stone material 33. 8. A retaining wall on which a plurality of retaining blocks are vertically stacked. Each retaining block includes a front plate 41, a rear plate 42 that is X2 behind the front plate 41, and A retaining wall in which vertically extending through holes 27a to 27c are formed by connecting plates 43a and 43b extending in the directions X1 and X2 and connecting the front plate 41 and the rear plate 42; and (b) a rear plate of the retaining block. (C1) a buried portion 35 buried in the back soil, and (c2) a retaining portion of the buried portion 35. (C2-1) The first portion 90, which is a connecting portion 36A inserted into the retaining wall from between the retaining blocks vertically adjacent to the end near the wall, and (c2-1-1) In the through holes 27a to 27c, the back plate 42 of the retaining block And a front extending portion 199 extending from below the through holes 27a to 27c to the vicinity of the front plate 41. (c2-1-2) The front extending portion 199 is continuous with the front extending portion 199, and is bent upward at the rear side of the front plate 41. (C2-1-3) a rising portion 195 that rises along the surface of the front plate 41;
1, a folded portion 196 extending rearward on the through holes 27a to 27c and the back plate 42, and (c2-1-4) a folded portion 196,
2 that extends rearward and extends into the back soil 22
And (c2-2) the second portion 91, wherein the first portion 90 is divided in the front-rear direction X1 and X2, and is connected to the connecting plate 43a of the earth retaining block 25 adjacent vertically. , 43
b having a second portion 91 inserted between b and extending in the front-rear direction X1, X2 to near the front end of the retaining block.
A, and (d) the crushed stone material 33 inserted into the through holes 27a to 27c so as to fit into the mesh of the front extending portion 199, the rising portion 195, and the folded portion 196, A reinforced soil structure comprising such a crushed stone material 33 which obtains a large mechanical locking force so that the reinforcing body 23A is not pulled out of the retaining wall by the crushed stone material 33.