JP2860780B2 - Large concrete block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tearing plate having a horizontally long rectangular face plate portion which is long on the left and right sides, and an upper face plate portion which is shifted by 1/2 of the horizontal width on the lower face plate portion. The present invention relates to a large-scale gravity concrete block that is built up in multiple stages at joints to form a dam or other dam or a retaining wall for soil retention.

[0002]

2. Description of the Related Art Japanese Utility Model Publication No. 58-3872, Japanese Patent Publication No. Sho 6
According to Japanese Patent Application Laid-Open No. 2-28245, in order to construct a weir or a retaining wall by stacking the upper face plate portions in multiple layers on the lower horizontally long face plate portion at the break joint as described above, A right angle to the face plate, centered at a position spaced apart by 1/4 of the width of the face plate inward from the left and right side edges of the face plate, and at the same height as the face plate, and integrated with the back face of the face plate. 2. Description of the Related Art A large concrete block having two right and left rearward retaining walls is known. The known block has a total of four vertical reinforcing bar through holes at the rear end portions of the left and right retaining walls and at a position where the left and right retaining walls protrude rearward on the face plate portion. The above-mentioned four reinforcing-bar through-holes are fitted from the upper end to predetermined reinforcing bars for four trees standing from the foundation of the wall, and the blocks are lowered along the reinforcing bars and stacked in multiple stages at break joints.

[0003]

Generally, the height of a block is about 75 cm. Therefore, for example, in order to stack 10 blocks, it is necessary to raise a 7.5 m-high reinforcing bar from the foundation. It must be lifted by about 8.5 m, and the lower ends of the four rebar through holes must be fitted to the upper ends of the predetermined four rebars. Each block weighs 800-900k
g is a heavy object, so even if lifting is performed with a machine such as a crane, it is extremely difficult to fit the lower ends of the four rebar through holes of the suspended block exactly at the upper ends of the predetermined four rebars. It takes time and effort. In particular, even if the four rebars are correctly erected from the foundation in accordance with the four through-holes of the block, if the height of the rebar is 7.5 m, the upper part of the rebar shakes and the four Since the upper ends of the reinforcing bars of the zigzag are displaced from the positions of the reinforcing bar through holes directed to the four blocks, it is difficult to fit the four reinforcing bar through holes of the block constituting the lower stage of the bank or the retaining wall into the reinforcing bar. Therefore, the construction efficiency of dams and retaining walls is extremely poor.

[0004]

Accordingly, the present invention provides, for example, a block from the bottom to the first block from the bottom and a block from the bottom to the third block from the bottom.
The blocks arranged at the break joints of the steps are alternately connected to each other with the connecting member and stacked in multiple steps, so that a dam or a retaining wall having a height of 20 m can be easily constructed. However, the problem of stacking using rebars that were raised high from the foundation was eliminated.

[0005]

The concrete large block according to the first aspect of the present invention has a long rectangular face plate portion that is long on the left and right sides.
Inward from the left and right side edges of this face plate, 1 / of the width of the face plate
In a large concrete block, which has two rearward right and left back walls which are perpendicular to the face plate portion and are integral with the back surface of the face plate portion at a position apart from each other by 4 degrees, the left and right Connection bolts are fixed to the two retaining walls in the lateral direction, and a connection member connected to the upper block is connected to one end of each bolt, and a connection member connected to the lower block is mounted to the other end using nuts. It is characterized by the following. In addition, the large concrete block according to claim 2 has a horizontally long rectangular face plate portion which is long on the left and right, and a position which is spaced from the left and right side edges of the face plate portion by １ ／ of the width of the face plate portion inward. perpendicular to the plane plate portion, and having a Hikaekabe back and right and left two rearward integral faceplate portion, in concrete large blocks stacked in multiple stages in breaking joints, the rear end of the left and right two backward Hikaekabe A bolt protruding backward is fixed to the part, and a connecting member for connecting to the upper block is connected to one of the left and right retaining walls, and a connecting member for connecting to the lower block is connected to the other bolt on the nut. It is characterized in that it is attached with. The large-sized concrete block according to claim 3 has a horizontally long rectangular plate portion that is long in the left and right directions, and a center portion that is inwardly spaced from the left and right side edges of the face plate portion by 1/4 of the width of the face plate portion. The right and left sides of the right and left retaining walls of a concrete large block having two rightward and leftward rearward retaining walls integral with the rear surface of the surface plate portion and stacked in multiple stages at a break joint. From left to right, 1 / of the width of the face plate
The connecting bolts for the right and left two protruding rearwardly are fixed at positions apart by 8 mm, one of the connecting bolts for the left and right two is connected to the upper block and the other is the lower block. The connecting members to be connected are each attached with a nut. And, in any of the concrete large blocks of claim 1, claim 2, claim 3,
It is preferable to form a horizontal through hole having a diameter larger than the width of the connecting member in the two left and right retaining walls.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In each of the illustrated embodiments, reference numeral 10 denotes a horizontally long rectangular face plate portion which is long on the left and right, and 11L and 11R denote １ ／ of the width W of the face plate portion inward from the left and right side edges L and R of the face plate portion. The right and left sides of a predetermined thickness centered on the positions 11 'and 11' which are separated from each other and having the same height H as the face plate portion and being perpendicular to the face plate portion and integral with the back face 10b of the face plate portion. Shows a backward facing wall. As an example of the dimensions of each part, the width W of the face plate portion 10 is 2 m, and therefore, 1/4 inward from the width W of the face plate portion.
Center 11 ', 1 of left and right retaining walls 11L, 11R apart from each other
1 'is a position 50 cm inward from the left and right side edges L and R of the face plate portion, the height H of the face plate portion and the left and right retaining walls 11L and 11R is 75 cm, and the rearward length of the left and right retaining walls is 30c
m, the width w ₁ of the base connected to the back of the face plate of each retaining wall is 2
0 cm, a width w ₂ of the rear end is 15cm, 13cm in side edges of the thickness of the face plate portion left and right, the thickness of the lateral portion buttresses connects the 20 cm, the thickness of the center is 17cm. For this reason, the back surface 10b of the face plate portion except for the portion where the retaining wall is connected,
The whole surface is formed as an inverted W-shaped inclined surface that is symmetrical at the center to improve the strength of the face plate portion itself and the connection strength between the face plate portion and the left and right retaining walls. Naturally, reinforcing bars are arranged inside the face plate portion and the left and right retaining walls. The surface 10a of the face plate portion may be made of concrete, or natural stone partially embedded in concrete may be exposed to the surface so as to be in harmony with the surrounding environment.

A vertical ridge 12 is provided on one of the left and right side edges L and R of the face plate portion, and a groove 13 for fitting the ridge is provided on the other side. Fits the ridge 12 into the groove 13 so that they mesh with each other,
Further, the trapezoidal projection 14 is formed on one of the upper and lower sides of the bases of the left and right retaining walls 11L and 11R connected to the back surface of the face plate, and the groove-shaped recess 15 is fitted on the other side across the bases. The protrusion 14 at the base of the left retaining wall 11L of the lower block stacked at the break joint is fitted in and engaged with the recess 15 of the base of the right retaining wall 11R of the upper block. When building blocks and retaining walls by stacking blocks at break joints, blocks adjacent to each other on the left and right of the same row in each vertical direction and blocks composing vertically on the upper and lower stages However, they are scrambling each other to increase the pile strength of dams and retaining walls. or,
In the left and right retaining walls 11L, 11R, horizontal through holes 16 are opened up and down. The diameter of the through hole 16 is larger than the width of the connecting members 22 and 23 to be described later, which is about 5 cm, for example, about 10 to 15 cm. 1 block at a break
When filling the back or the backfill material such as ready-mixed concrete with every step or several steps, the backfill material enters inside the through holes 16 and 16 in the lateral direction and fills the holes. It is designed to improve the strength of the connection between the ground and the retaining wall and the underlying soil layer, as well as the strength of the masonry and retaining walls.

The above-mentioned connecting members 22 and 23 are used to connect an anchor standing on a foundation to a first-stage block arranged thereon, or to connect an upper-stage such as a first-stage and a second-stage or a second-stage and a third-stage. It is intended to use a flat bar of iron having a thickness of about 6 mm and a width of about 5 cm, for example, for connecting the block of the lower row and the block of the lower row alternately. What is required is that the length is slightly longer than 1/2 of the height of the block, and that the upper and lower blocks are combined and that the length is slightly longer than the height of the block. The anchor standing on the foundation is also a flat bar made of iron, which is welded to a reinforcing bar buried in the foundation to stand from the top of the foundation.

FIG. 1 shows an embodiment of the present invention, in which two left and right rearward retaining walls 11L and 11R are １ ／ of the height H.
Position (the middle position between the upper and lower through holes 16, 16)
A connecting member 22 for connecting and connecting the connecting bolt 21 of the upper block to one end of each connecting bolt, for example, the left end of the bolt protruding from the left side surface of each retaining wall, A connecting member 23 connected to the connecting bolt of the lower block at the right end of the bolt protruding from the right side surface
Can be fixed with nuts 24 through washers 25, respectively. The connecting bolts 21 penetrated and fixed laterally to the left and right retaining walls may be embedded and attached to the retaining walls when the block is formed, or the blocks may be formed so as to have bolt insertion holes. Alternatively, after molding, the bolt 21 may be passed through the insertion hole and fixed.

[0010] left and right backward Hikaekabe 11L, 11R is thicker width w ₁ of the base portion that is connected to the face plate portion, thin width w ₂ of the rear end, thereby sides of each copy wall toward the rear end from the base Is tapered. Therefore, as shown in an enlarged manner in FIG. 1C, the washer 25 fitted to each of the left and right ends of the connection bolt 21 has a tapered surface opposite to the side surface of the retaining wall. It is preferable that the taper on the side face be canceled against the side face of the retaining wall so that each end of each of the connecting members 22 and 23 can be attached by the nut 24 perpendicularly to each end of the connecting bolt 21.

On a foundation 18 constructed by casting ready-mixed concrete in front of the soil layer 17, left and right blocks of the first block arranged in the left-right direction as shown in FIGS. An anchor 19 connected to a lower end of a connecting member 23 attached to a right end of a connecting bolt projecting from one side surface of the walls 11L, 11R, for example, a right side, with a nut is projected upward from a predetermined position. Therefore, the first-stage blocks are adjacent to each other on the foundation 18 in the left-right direction, are arranged while engaging the ridges 12 and the grooves 13, and the left and right retaining walls 11L,
The right end of the connecting bolt protruding from the right side of 11R and the anchor 19 standing from the upper surface of the foundation are connected via a connecting member 23 attached by bolts, and the first-stage block arrangement (I) is placed on the foundation. Fix it. Note that the connecting member 23 may be buried and erected on the foundation so as to also serve as the anchor 19.

Next, half of the width of the face plate portion is shifted on the arrangement of the first-stage blocks, and the second-stage blocks are arranged by breaking ground stacking, as shown in FIG. The left end of the connecting bolt protruding from the left side of the left retaining wall 11L of the eye block, the left end of the connecting bolt protruding from the left side of the right retaining wall 11R of the second stage, and the first level The left end of the connecting bolt protruding from the left side surface of the right retaining wall 11R of the block and the left retaining wall 1 of the block on the right side of the second stage
The left ends of the connecting bolts protruding from the left side of the 1L are connected by connecting members 22 attached with nuts 24, respectively, and the arrangement of the second block (II) is arranged on the arrangement of the first block (I). Fix it. Then, if the third-stage block is arranged at the break joint on the second-stage block array, the arrangement of the third-stage block (III) is the same as the arrangement of the first-stage block (I). The right end of the connecting bolt projecting from the right side of the left retaining wall 11L of the second stage block, the right end of the connecting bolt projecting from the right side of the right retaining wall 11R of the third stage block, and The right end of the connecting bolt protruding from the right side of the right retaining wall of the second stage block and the right end of the connecting bolt protruding from the right side of the left retaining wall of the third stage right block, respectively. The third block arrangement (III) is fixed on the second block arrangement (II) by the connection member 23 attached with the nut 24. This gives 1
The second-stage block and the second-stage block are alternately connected with the second-stage block and the third-stage block by connecting members 22 and 23, and furthermore, a protrusion 14 and a recess at the base of the retaining wall of the upper and lower blocks. 15 fits.

In this manner, the arrangement of the upper blocks in the lower row is repeated by shifting the half width of the blocks to the address of the lower rows and arranging the upper blocks by break jointing. The left and right ends of the connecting bolts penetrating the left and right retaining walls 11L and 11R in the horizontal direction, one of the two blocks adjacent to the upper stage is the left retaining wall, and the other is the right. Are connected alternately with corresponding ends of connecting bolts provided through the retaining walls 11L and 11R in the lateral direction by connecting members 22 and 23 attached by nuts, respectively, so that the arrangement of the blocks is one or more. The backfill material 26, such as ready-mixed concrete, is filled between the tiers and the soil layer 17 to build a bank or retaining wall of a required height. Since the diameter of the lateral through-hole 16 provided in each retaining wall is larger than the width of the connecting members 22 and 23 as described above, the backfill material 26 wraps around the through-hole 16, whereby As described above, it is possible to improve the bonding strength between the embankment and the retaining wall and the soil layer behind, and also to improve the masonry strength of the embankment and the retaining wall.

FIGS. 2 and 3 show one embodiment of the second embodiment.
The center 11 'of the two left and right rearward retaining walls 11L, 11R,
At the rear end of 11 ', a connecting bolt 21 protruding backward is embedded and fixed at the center of a position at a half of the height H. For example, a connecting bolt protruding from the rear end of the left retaining wall 11L is The connecting member 22 is connected to the connecting bolt protruding from the rear end of the right retaining wall 11R of the upper block stacked at the break joint, and the connecting bolt protruding from the rear end of the right retaining wall 11R is connected to the left of the lower block. A connecting member 23 connected to a connecting bolt protruding from the rear end of the retaining wall 11L can be fixed by a nut 24.

As shown in FIGS. 3 (A) and 3 (B), a foundation 18 constructed by casting ready-mixed concrete in front of the soil layer 17 has a right block of the first block arranged in the left-right direction. The anchor 19 connected to the connecting bolt protruding from the rear end of the retaining wall 11R or the connecting member 23 also serving as an anchor is made to protrude upward. Therefore, the first block is
A connecting bolt 21 which is adjacent to the upper side in the left-right direction, is arranged while engaging the ridge 12 and the groove 13, and projects from the rear end of the left retaining wall 11R of each block, and an anchor 19 or a connecting member standing from the upper surface of the foundation. 23 are connected with nuts, and the arrangement (I) of the first block is fixed on the foundation.

Next, the second block is arranged on the arrangement of the first-stage block by breaking the half width of the face plate portion by half, and the right block wall 11R on the right of the first-stage block is arranged.
The connecting bolt projecting from the rear end of the second block is connected to the connecting bolt projecting from the rear end of the left retaining wall 11L of the second block by the connecting members 22 attached with nuts 24, respectively. The sequence (II) is fixed on the sequence (I) of the first-stage block. Then, if the third-stage block is arranged at the break joint on the second-stage block array, the arrangement of the third-stage block (III) is the same as the arrangement of the first-stage block (I). A connecting member in which a connecting bolt protruding from the rear end of the right retaining wall of the second block and a connecting bolt protruding from the rear end of the left retaining wall of the third block are attached with nuts 24, respectively. 23, and the sequence (III) of the third block is fixed on the sequence (II) of the second block. As a result, the first-stage block, the second-stage block, the second-stage block and the third-stage block are alternately connected by the connecting members 22 and 23, and furthermore, the protrusions at the bases of the retaining walls of the upper and lower blocks are provided. The part 14 and the concave part 15 fit each other.

In this manner, the arrangement of the upper block by the break jointing by shifting the width of the block by １ ／ to the arrangement of the lower block is repeated. A connecting bolt projecting from one rear end of the left and right retaining walls 11L and 11R, and a connecting bolt projecting from the rear end of the other retaining wall of the two adjacent blocks on the upper stage.
Each of the blocks is alternately connected by connecting members 22 and 23 attached with nuts, and each time the blocks are stacked one or more stages, a backfill material 26 such as ready-mixed concrete is filled between the blocks and the soil layer 17, Weirs and retaining walls of the required height can be constructed. The backfill material 26 wraps around into the through hole 16 as in the first embodiment, and as a result, as described above, the bonding strength between the embankment and the retaining wall and the soil layer behind, as well as the combination of the embankment and the retaining wall. The stacking strength can be improved.

FIGS. 4 and 5 show an embodiment of claim 3 according to the present invention.
On the back of the face plate portion, two left and right rearward retaining walls 11L, 11
The width W of the face plate portion is 1 to the left and right from the centers 11 ', 11' of R.
Connection bolts 21 for left and right two left and right sides projecting rearward at the center of a position １ ／ of height H separated by / 8
L and 21R are embedded and fixed.
One of the connection bolts destined for the book, for example, the right one 21R, the connecting member 22 connected to the right one 21R of the connection bolts destined for the left and right two on the back of the upper block piled at the break joint, the lower connection bolt 21L to the left connection bolt 21L The connection member 23 connected to the left connection bolt 21L of the two connection bolts on the left and right sides of the block is fixed by a nut 24 via a washer.

The back surface 10b of the block has left and right retaining walls 11
Except for the connection with L, 11R, it is an inverted W-shaped, symmetrical inclined surface at the center as described above, and left and right side edges L, 11R.
Since the thickness of R and the thickness of the center are different, as shown in FIG. 4 (C), the back surface 10b 'from each side edge L, R toward the base of the left and right retaining walls 11L, 11R, and the left and right retaining walls. The angle of inclination of the back surface 10b ″ from the base toward the center is different. Therefore, the washer 25L fitted to the left and right two connecting bolts 21L and the washer 2 fitted to the right connecting bolt 21R.
5R has an inclined surface opposite to the inclined angle of the back surface of each block, and uses a different thickness to cancel the inclined surface of the back surface and to make the protruding surface from the back surface the same surface 25 '. It is preferable that each end of each of the connecting members 22 and 23 be attached to the connecting bolts 21L and 21R at the same plane 25 'and at a right angle by the nut 24.

As shown in FIGS. 5 (A) and 5 (B), a foundation 18 constructed by in-situ casting of ready-mixed concrete in front of the soil layer 17 has a back surface of the first block arranged in the left-right direction. An anchor 19 that is connected to one of two connection bolts on the left, right, left and right sides, for example, a lower end of the connection member 23 descending from the left connection bolt 21L by a nut, or a connection member 23 that is also used as an anchor is placed at a predetermined position. And protrude upward. Therefore, the first block is
8 are arranged adjacent to each other in the left-right direction while the ridges 12 and the grooves 13 are engaged with each other, and stand from the left connection bolt 21L of the left and right connection bolts 21L on the back surface of the face plate portion of each block and the upper surface of the foundation. Anchor 19 (23) is connected with nut 24, and 1
The array (I) of the block at the stage is fixed on the base.

Next, on the arrangement of the first-stage blocks, a second-stage block is arranged by breaking the stack by shifting the width of the face plate portion by half, and the left and right sides of the back of the first-stage block are arranged. Connection bolt 21R to the right of the two connection bolts
And the right connecting bolt 21R of the two right connecting bolts on the back of the second block, and the right connecting bolt 2 of the two left connecting bolts on the back of the right block of the second stage.
1R are connected by connecting members 22 attached with nuts 24, respectively, and the arrangement of the second-stage blocks (II) is fixed on the arrangement of the first-stage blocks (I). Then, if the third-stage block is arranged at the break joint on the second-stage block array, the arrangement of the third-stage block (III) is the same as the arrangement of the first-stage block (I). The left and right connection bolts 21L, 21L of the left and right two connection bolts on the back of the second stage block and the two right and left connection bolts on the right of the back of the third stage left block, respectively. Left connecting bolt 21L,
The left connecting bolt 21L of the left and right two connecting bolts on the back side of the block adjacent to the right is connected by connecting members 23 attached with nuts 24, respectively, and the third block arrangement (III) is performed in two steps. Fix on the sequence (II) of the eye block. As a result, the first-stage block, the second-stage block, the second-stage block and the third-stage block are alternately connected by the connecting members 22 and 23, and furthermore, the protrusions at the bases of the retaining walls of the upper and lower blocks are provided. The part 14 and the concave part 15 fit each other.

In this way, the arrangement of the upper block by repeating the arrangement of the blocks in the lower row by half the width of the block and stacking the break blocks is repeated. One of the left and right connecting bolts projecting from the left and right sides of the back of the rear of the block, and the other of the right and left connecting bolts protruding from the left and right sides of the back of the adjacent block on the upper stage is one of the left connecting bolts , The other is the right connecting bolt comrades,
Each of the blocks is alternately connected by connecting members 22 and 23 attached with nuts, and each time the blocks are stacked one or more stages, a backfill material 26 such as ready-mixed concrete is filled between the blocks and the soil layer 17, Weirs and retaining walls of the required height can be constructed. The backfill material 2 is similar to the first and second embodiments.
6 wraps around the through hole 16, thereby improving the bonding strength between the embankment and the retaining wall and the soil layer behind, as well as improving the assembling strength of the embankment and the retaining wall, as described above.

In each of the first, second and third embodiments shown in the drawings, the connecting position of the connecting bolt 21 is １ ／ of the height of the retaining wall or the face plate having the same height. A predetermined position such as a position of 1/3 of the height or a position of 2/3 of the height from below may be used.

[0024]

As is apparent from the above description, according to the present invention, when an arrangement of blocks is alternately piled up at a half of the width of the block and stacked alternately by break jointing, a claim or a retaining wall is constructed. According to 1, the connecting bolts penetrated in the lateral direction are used for the left and right rearward retaining walls on the back side of the block, for example, the left side of the left retaining wall of the first block and 2
The left side of the right retaining wall of the left block of the tier, the left side of the right retaining wall of the same first block, and the left side of the left retaining wall of the second right block are connected, respectively. It is connected to each end of the bolt with a connecting member attached with a nut, and the right side of the left retaining wall of the right block of the second stage and the right side of the right retaining wall of the left block of the third stage The right side of the right retaining wall of the right block of the second stage and the right side of the left retaining wall of the right block of the third stage are each connected with a nut attached to each end of the connecting bolt with a nut. In this way, the side walls of the retaining walls of the upper and lower blocks are alternately connected by a connecting member, and according to claim 2, using the connecting bolts protruding from the rear ends of the right and left retaining walls on the back surface of the block, for example, Attach the rear end of the right retaining wall of the first block and the rear end of the left retaining wall of the second right block to the connecting bolts with nuts. The rear end of the right retaining wall of the right block of the second stage, the rear end of the left retaining wall of the right block of the third stage, and the left block of the second stage The right retaining wall and the rear end of the left retaining wall of the third block are connected by connecting members attached to the connecting bolts with nuts, respectively, and thus the rear ends of the retaining walls of the upper and lower blocks are connected. According to the third aspect, the left and right connecting bolts projecting from the left and right rear surfaces of the left and right back walls of the block are used as the center, and for example, the first and second left and right connecting bolts are used. The right connecting bolts of the connecting bolts destined for the book are the right connecting bolts of the two right and left connecting bolts on the right side of the second block on the left, and the right and left 2 on the left side of the second block on the right block.
The right connecting bolts of the two connecting bolts are connected by connecting members attached with nuts, respectively, and the left connecting bolt of the connecting bolts to the left and right of the second right block and the third connecting bolt The left connecting bolt of the right and left two connecting bolts on the right side of the left block, and the left and right 2 on the left side of the third right block
The connection bolts on the left side of the connection bolts for the book are connected by connection members attached with nuts respectively, and thus the backs of the upper and lower blocks are connected alternately by the connection members, and the first block is arranged on the block arrangement. Each time the block for one stage is broken and piled up by jointing, the connecting members can be alternately fixed with nuts to construct a dam or a retaining wall. Therefore, it is extremely easy and efficient to construct blocks without any formwork, no matter how many blocks are stacked, and even if the height of the embankment or retaining wall is 20 m or more. And the construction period can be shortened.

[Brief description of the drawings]

FIG. 1 is a front view of one embodiment of a block according to claim 1, wherein one half of the block is viewed from the front side and the other half is viewed from the back side;
(B) is a side view, (C) is a partially enlarged plan view,
(D) is a side view of the constructed embankment and retaining wall, and (E) is a front view of one half of the constructed embankment and retaining wall viewed from the front surface and the other half viewed from the back surface.

FIG. 2A is a front view of one embodiment of the block according to claim 2, wherein one half of the block is viewed from the front surface, and the other half is viewed from the back surface;
(B) is a side view, and (C) is a plan view.

FIG. 3 (A) is a side view of a bank and a retaining wall constructed by the block of claim 2; FIG. 3 (B) is a half of a part of the constructed bank and a retaining wall viewed from the front surface and the other half thereof is viewed from the rear surface; It is a front view.

FIG. 4 is a front view of one embodiment of the block according to claim 3, wherein (A) shows one half of the block from the front side and the other half from the back side;
(B) is a side view, and (C) is a partially enlarged plan view.

5 (A) is a side view of a bank and a retaining wall constructed by the block of claim 3, and FIG. 5 (B) is a half of the constructed bank and the retaining wall viewed from the front side and the other half viewed from the rear side. It is a front view.

[Explanation of symbols]

 10 Face plate portion of block 11L Left retaining wall 11R Right retaining wall 12 Ridge provided on one of left and right side edges of face plate portion 13 Groove provided on the other of left and right side edges of face plate portion 14 Left and right retaining wall 15 Protrusions provided on one of the upper and lower sides of the base 15 Depressions provided on the other of the upper and lower sides of the bases of the right and left retaining walls 16 Lateral through holes provided on the left and right retaining walls 17 Soil layer 18 Foundation 19 Anchor 21 Connecting bolt 22 Connecting member 23 Connecting member 24 Nut 25 Washer 26 Backfill material

Claims (4)

(57) [Claims] 1. A horizontally long rectangular face plate portion that is long in the left and right direction, and at right angles to the face plate portion around a position inward from left and right side edges of the face plate portion at a distance of 1/4 of the width of the face plate portion, and A large concrete block that has two left and right rearward retaining walls integral with the back of the face plate part and is stacked in multiple layers at a break joint. A large block made of concrete, wherein one end of each bolt is connected to a connecting member connected to an upper block and the other end is connected to a connecting member connected to a lower block by nuts. 2. A horizontally long rectangular face plate portion which is long on the left and right, and a right angle to the face plate portion centered on a position inside the left and right side edges of the face plate portion at a distance of 1/4 of the width of the face plate portion. In a large concrete block having left and right rearward retaining walls integral with the back surface of the face plate portion and stacked in multiple stages at breaks, bolts projecting rearward at rear ends of the two left and right rearward retaining walls are provided. The connecting member connecting to the upper block is attached to one of the two left and right retaining walls with a nut, and the connecting member connecting to the lower block is attached to the other retaining wall with a nut. Large block made of concrete. 3. A face plate portion having a horizontally long rectangular shape that is long in the left and right directions, and at right angles to the face plate portion with a center inward from left and right side edges of the face plate portion at a distance of 1/4 of the width of the face plate portion. A large concrete block having two left and right rearward retaining walls integral with the rear surface of the face plate portion, and stacked in multiple layers at a break joint. The connecting bolts for the right and left two protruding rearward are fixed at positions spaced apart by 1/8 of the horizontal width of the connecting member, and one of the connecting bolts for the left and right two is connected to the connecting member connected to the upper block and the other to the other. Is a large block made of concrete, characterized in that connecting members for connecting to the lower block are attached with nuts. 4. The large concrete block according to claim 1, wherein the left and right retaining walls have a diameter larger than the width of the upward connecting member or the downward connecting member. A large concrete block with a horizontal through hole.