JP3333742B2 - Retaining wall 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 retaining wall block for defending an inclined wall or a vertical wall of an embankment of a highway or the like. The present invention relates to a retaining wall block capable of adjusting the position in the front-rear direction, and further advocating a wall surface having a curved surface that is convexly curved.

[0002]

2. Description of the Related Art A retaining wall block for protecting an embankment, a cut inclined wall or a vertical wall having a step, and a retaining wall having a structure covering the inclined wall or the vertical wall having a step,
Conventionally known. Conventional blocks are sequentially stacked and installed in accordance with the original purpose of the retaining wall, and different blocks are used according to the inclination angle of the embankment or cut. However, since these simply installed ones are displaced in the upper and lower blocks, blocks for preventing these displacements have been developed. For example, in the retaining wall block, an L-shaped engaging portion is formed on the upper surface of the lateral wall, and an L-shaped engaging groove is formed on the back surface of the bottom wall. The lateral displacement is prevented by engaging the L-shaped engaging portion with the L-shaped engaging groove on the back surface of the bottom wall, and furthermore, the upper surface of the L-shaped engaging portion on the upper surface of the lateral wall is roughened to prevent the longitudinal displacement. What has been prevented is known (see Japanese Utility Model Laid-Open No. 53-45704).

[0003] Further, it is known that the upper and lower retaining wall blocks are connected by pins to prevent the upper and lower retaining wall blocks from shifting in the front, rear, left and right directions (Japanese Utility Model Laid-Open No. 59-1026).
No. 31).

Further, in addition to the front wall, the left and right lateral walls and the bottom wall,
A retaining wall block consisting of a horizontal wall and a partition wall extending parallel to the front wall is also known (see JP-A-49-113406). However, these known retaining walls have a structure in which an L-shaped engaging portion and an L-shaped engaging groove are connected (Japanese Utility Model Application Laid-Open No. 53-457).
No. 04), the upper and lower retaining wall blocks cannot be combined while being piled up by a simple operation, and the displacement in the front-rear direction cannot be reliably prevented. In the case of a pin-coupled retaining wall block (Japanese Utility Model Laid-Open No. 59-102631),
Because of the pin connection, it is not possible to reliably prevent displacement in the front-rear and left-right directions. Further, in a retaining wall block (Japanese Utility Model Laid-Open No. 59-102631) composed of a horizontal wall and a partition wall extending in parallel, since the partition walls are not vertically connected, the front and rear reinforcement by the partition walls is insufficient. Walls can be destroyed by earth pressure.

In a conventional retaining wall, it is general that a foot projecting backward from a front wall is inserted into the soil to fix the blocks, and each block is provided with a bottom wall. Did not. For this reason, the block may be shifted left and right, and there is a problem in strength.

The applicant has proposed the invention disclosed in Japanese Patent Publication No. 5-46412. That is, in a block having at least a front wall, left and right side walls, and a bottom wall, and forming a retaining wall by stacking a large number of parts up and down and right and left, a partition wall extending in parallel with the side wall is provided in the middle of the front wall, and The height of the partition wall is the same as that of the partition wall, and three concave grooves are provided on the lower surface of the bottom wall. The three concave grooves are formed in the lower groove. The horizontal wall and the partition wall are provided with insertion holes in the vertical direction, and the upper and lower blocks are fixed by passing pins through the insertion holes, and the present invention is easy to assemble. At the same time, there is provided a block in which there is no left-right or front-to-back deviation and the front wall is reliably reinforced, and this retaining wall block has the above-mentioned excellent characteristics, and is practically used and widely used. ing.

[0007]

By the way, the problem to be solved by the present invention is that the remarkable advantage of the retaining wall block developed by the applicant is that the assembling work is simple, and there is no left-right displacement or front-rear displacement. In addition to the fact that the front wall is reliably reinforced, and despite having strength against loads from above, it is lightweight, low-cost, safe, and has a curved laterally curved surface. It is to provide a retaining wall block that can also be stacked.

[0008]

According to the first aspect of the present invention, there is provided a front wall, left and right lateral walls extending rearward from the front wall, and a bottom wall. In the retaining wall block 1 having a large number of retaining walls 4 stacked vertically and horizontally to form a retaining wall, the left and right lateral walls 3, 3 are respectively provided on the front wall back surface 7 between the left and right front wall side ends 5 and the front wall central portion 6. The upper surface 15 of the lateral wall 3 is slightly higher than the upper surface of the front wall 2, and the lower surface 8 of the bottom wall is
Two end-side concave bottom portions 10, 1, having two ridges 9, 9 extending rearward at a distance and defined by the ridges 9, 9
Consists of 0 and one central concave bottom 11 and two convex stripes 9, 9
Side 13 engages with the side surface 14 of the lateral wall 3 of the retaining wall block 1 stacked on the lower side, and the upper surface 15 of the lateral wall rests on the end side concave bottom portion 10 of the retaining wall block stacked on the upper side, and the lateral wall 3 is placed on the upper side. A retaining wall block 1 having a plurality of insertion holes 16 on the lower surface in a vertical direction, and fixing the retaining wall blocks 1, 1 stacked vertically by inserting a joint pin 27 into the insertion hole 16. .

According to the second aspect of the present invention, the retaining wall block 1 in the above means has a plurality of through holes 17 penetrating left and right through the lateral walls 3 and 3 and a plurality of vertical holes penetrating through the bottom wall 4 on the side of the central concave bottom 11. 3. The retaining wall block 1 according to claim 1, wherein a through hole 18 is provided, and a reinforcing bar is provided at a main part of each wall.

According to the third aspect of the present invention, in the retaining wall block 1 according to the first or second aspect, the retaining wall blocks 1 stacked on the lower stage are provided with the retaining walls from the front wall 2 and the rear wall 2 of the bottom wall 4. The retaining wall block 1 is characterized in that the length is longer than the length of the retaining wall block 1 stacked on the upper stage from the front wall 2 and the rear wall 2 of the bottom wall 4 to the rear.

According to the fourth aspect of the present invention, in the retaining wall block 1 according to the first or second aspect, the retaining wall blocks 1 stacked on the lower stage are provided with the retaining walls from the front wall 2 and the rear wall 2 of the bottom wall 4. The retaining wall block 1 is characterized in that the length is the same as the length of the retaining wall block 1 stacked on the upper stage from the front wall 2 and the rear wall 2 of the bottom wall 4 to the rear.

According to the fifth aspect of the present invention, the insertion hole 16 is formed in the side wall 3.
5. A means according to any one of claims 1 to 4, wherein a plurality of the retaining walls are provided in the holding direction so as to be adjustable in the front-rear direction of the upper and lower retaining wall blocks. It is a retaining wall block 1.

[0013]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a retaining wall block of the present invention stacked on the uppermost stage, and FIG.
(B) is the figure seen from the back side. FIG. 2 is a perspective view of a retaining wall block in which a hole is formed in a lateral wall and a bottom wall in the holding direction of the retaining wall block, and FIG.
(B) is the figure seen from the back side. The retaining wall block shown in FIG. 2 is further reduced in weight, and is provided with a hole penetrating through the lateral wall and a hole penetrating through the bottom wall 4, respectively.
Reinforcing bars are installed at key points inside each wall to reinforce the strength of each wall,
This is a reinforced concrete type retaining wall block in which the thickness of each wall is made thinner than that without a reinforcing bar to reduce the frame weight. FIG. 3 is a retaining wall block shown in FIG. 2, wherein (a) is a front view, (b) is a rear view, and (c) is a bottom view. 4 is a retaining wall block shown in FIG. 2, (a) is a sectional view taken along line XX in the front view of FIG. 3, (b) is a right side view, and (c) is a plan view. FIGS. 5A and 5B are a plan view and a bottom view of the bottom wall and the lateral wall of the retaining wall block having different lengths in the holding direction. FIG. 5A is a plan view of the holding wall block having the holding length of 2000 mm, and FIG. The bottom view, (c) is a copy length of 3000
(d) is a bottom view thereof, and (e) is a plan view of a dummy length of 4000 mm, and (f) is a bottom view thereof. FIG. 6 is a side view showing an example in which retaining walls having different lengths are stacked to form a straight wall stack. The length of the uppermost retaining wall block is 1000 mm, and the length of the uppermost retaining wall block is 1000 mm. Is 5000 mm in length. FIG.
FIG. 3 is a side view showing an example in which retaining walls blocks having different lengths are stacked in a greening type by stacking front walls in a stepwise manner. 8A and 8B are side views showing an example in which an L-shaped block having a bottom wall having a length of 800 mm is placed on the top and constructed, and FIG. 8A shows a straight wall type, and FIG. 8B shows a greening type. Show.

The retaining wall block 1 of the present invention comprises a front wall 2 which constitutes a front surface of a plurality of retaining walls stacked vertically and horizontally and left and right lateral walls 3 and 3 extending rearward from a front wall back surface 7.
And a bottom wall 4 extending rearward from the front wall back surface 7. A common drainage hole 19 is provided below the center of the front wall 2. The length of the lateral wall 3 and the bottom wall 4 extending rearward, that is, the length of the stay is the same. Further, the length of the stay of the side wall 3 and the bottom wall 4 is the retaining wall block 1 stacked on the lower stage.
Are longer, and those on the top are shorter. However, as a result of the load calculation, the same retaining wall blocks can be stacked in multiple stages. Further, a plurality of holes 17 arranged in the holding direction of the lateral wall 3 are formed. Further, a plurality of holes 18 arranged in the holding direction are formed in the bottom wall 4. By forming these holes 17 or 18, the weight of the retaining wall block 1 is reduced. Further, although not shown, a reinforcing bar is inserted into a key portion of each wall of the retaining wall block 1 at the time of manufacturing to increase the strength. By inserting the rebar, the thickness of each wall of the non-rebar type retaining wall block 1 can be made thinner, and the weight is reduced accordingly. Further, the left and right lateral walls 3 are provided between the left and right front wall side ends 5 and the front wall central portion 6, that is, on the front wall back surface 7 at a portion closer to the center than the side ends. The left and right side ends of the bottom wall 4 are also located slightly closer to the center than the front wall side end 5. Thus, the side wall 3 exists near the front wall center part 6,
In addition, since the left and right ends of the bottom wall 4 exist inside the left and right ends of the front wall, when the retaining wall blocks 1 are arranged side by side, it is easy to make the front surface convex and curved. Further, by making the side wall 3 closer to the front wall center portion 6, the strength against a load from above is improved. That is, the weight is lightened because of only the two lateral walls 3, but the strength to the upper part is excellent. Further, the upper surface 15 of the lateral wall 3 is formed slightly higher than the upper surface of the front wall 2.

The connecting portion between the lateral wall 3 and the front wall back surface 7 forms a built-up portion 20 connecting the two obliquely, and the connecting portion between the upper surface of the bottom wall 4 and the front wall back surface 7 connects the two obliquely. The build-up portion 21 is formed, and the upper surface of the bottom wall 4 and the outer connection portion of the lateral wall 3 form a build-up portion 22 for connecting the two obliquely, and the upper connection surface of the bottom wall 4 and the inner connection portion of the horizontal wall 3 form both. A buildup portion 23 that connects diagonally is formed, and the connection structure between the two walls is made strong. In addition, a chamfer 24 is formed around the front side of the front wall 2.

On the lower surface 8 of the bottom wall, the right and left ends of the bottom wall 4
Further, there are provided two ridges 9, 9 which are separated from the center to the left and right and extend rearward. The distal end of the ridge 9 is provided at a position retracted from the front by an amount corresponding to the rear side of the front wall back surface 7 of the lower retaining wall 1. The bottom wall lower surface 8 is defined by these two ridges 9, 9 and has two end-side concave bottoms 10 and 10 and one central concave bottom 11. The central concave bottom portion 11 is formed with a plurality of the above-described holes 18 in the bottom wall 4 in the holding direction. The formation of the holes 18 serves to reduce the weight of the retaining wall block 1, facilitate the inflow of earth and sand, and have a function of leaching water from the slope downward. The outer side surface 1 of each of these two ridges 9, 9
3 and 13 engage with the inner side surfaces 14 and 14 of the lateral walls 3 and 3 of the retaining wall block 1 stacked below the retaining wall block 1 to prevent the retaining wall blocks stacked vertically from shifting laterally. I have. Further, the side walls 3 of the retaining wall block 1 respectively,
The upper surfaces 15, 15 of the 3 are placed on the left and right end-side concave bottoms 10, 10 of the retaining wall block 1 stacked on the upper side of the retaining wall block 1. Each of the horizontal walls 3 has a vertical insertion hole 16. Through these insertion holes 16, joint pins 27 are inserted to fix the retaining wall blocks 1, 1 stacked vertically.

The size of the retaining wall block 1 is the same, regardless of the stacking level, with the height of the front wall 2 being 994 mm and the width of the front wall 2 being 1895 mm. However, the length of each stay of the side wall 3 and the bottom wall 4 is the retaining wall block 1 piled on the top,
At 1000 mm, the length of the stub increases by 500 mm as the layers are sequentially stacked on the lower stage. But,
As described above, as a result of the stability calculation, the retaining wall blocks of the same length can be stacked in multiple stages. Furthermore, the retaining wall block 1 for stacking on the top is a standard one and has a height of 100.
0 mm. However, depending on the height of the retaining wall to be piled up, the retaining wall block 1 for the uppermost row has a height of 200
800mm, 600mm, 400m lowered by mm
m, 200 mm retaining wall block. In some cases, an L-shaped block 12 having an L-shaped cross section may be stacked on the uppermost stage further above the uppermost retaining wall block 1 for linear adjustment, weight reduction, and cost reduction. The length of the L-shaped block 12 is shorter than that of the uppermost retaining wall block 1, for example, 800 mm. Further, the size of the hole provided in each of the side walls 3 or the bottom wall 4 is 350 mm in large diameter.
And the small diameter is 300 mm. Therefore, the height of the retaining wall block 1 for the uppermost row is 400 mm or 200 mm.
No hole is formed in the side wall 3 having a height of. The side wall 3 is 455 mm from the right front wall side edge 5 and 46 from the left front wall side edge 5 to 46 mm.
An adjustment width of 5 mm is provided on the right side of the right front wall end 5 at a position close to the center of 0 mm. Furthermore, the right side end of the right bottom wall 4 is located 50 mm inside from the right front wall side end 5, and the left side end of the left bottom wall 4 is located 55 mm inside from the left front wall side end 5.

The ridge 9 is 505 from the side end of the bottom wall 4.
mm at the center from the inside position. That is, the width of the end concave bottom portion 10 is 505 mm. Further, the width of the ridge 9 is 290 mm. The width of the central concave bottom 11 between the two ridges 9 is 300 mm. Insertion holes 1 for inserting joint pins provided on the upper and lower surfaces of the lateral wall 3
6 is located 250 mm behind the front wall 2, and
Is formed at a position 100 mm forward from the rear end. Then, those that are stacked on the lower tier, respectively, form insertion holes that are shifted inward by 500 mm from the positions of the insertion holes. Since the position of the insertion hole is shifted by 500 mm in this manner, the retaining wall block 1 stacked on the upper stage is 500 mm.
You can move by one. In addition, the length of the reserve is 400
For the case of 0 mm or more, the position of the insertion hole is shifted by 500 mm and the position of the insertion hole is further shifted by 500 mm, so that retaining wall blocks having different lengths of 1000 mm can be stacked vertically.

In addition, the retaining wall block placed at the lowest stage has a flat plate-like shape of, for example, 100
Providing a projecting portion with a projecting amount of 0 mm improves stability when applied to soft ground.

The side end of the bottom wall 4 of the retaining wall block according to the present invention is located 50 mm inside from the side front wall side end 5 and 55 mm inside from the left front wall side end 5. The side end of the bottom wall 4 is
The size approaching the inside from is not limited to the above. Therefore, the adjacent retaining wall block may be installed at an angle to the retaining wall block until the rear portion of the bottom wall side edge of the retaining wall block contacts the rear portion of the bottom wall side end of the adjacent retaining wall block. it can. In this way, it can be used for the construction of a retaining wall having a convexly curved wall surface. However, for a wall surface having a smaller curvature radius, the side end of the bottom wall 4 of the retaining wall block is moved from the front wall side end 5 to the front wall side end 5. By further moving inward or by inserting the side end of the bottom wall 4 behind the buttress portion inside to form a retaining wall block, the retaining wall can be further stacked as a rounded retaining wall.

FIGS. 6 and 7 show the retaining wall block 1 of the present invention.
Is shown from the side. FIG. 6 shows a retaining wall of a direct product type having a vertical front wall surface. The construction procedure of the retaining wall block 1 of the present invention will be described below. First, foundation work is performed. The foundation works are to excavate the earth and sand of the foundation, lay crushed stone 25 or quarry stone, and cast foundation concrete 26 thereon. Then, on the foundation concrete 26, thickness 20m
m mortar, and the longest retaining wall block 1 consisting of the first-stage side wall and bottom wall is suspended therefrom with a dedicated hanging metal fitting. Further, the embankment is poured into the first-stage retaining wall block 1, and the back portion of the retaining wall block 1 is backfilled and compacted. Next, the joint pin 27 is inserted into the foremost through hole 16 of the first retaining wall block 1 and the second through hole 16 from the rear, and the retainer 500 mm shorter than the retainer of the first retaining wall block 1. The second retaining wall block 1 is aligned so that its front wall 2 is perpendicular to the front wall of the first retaining wall block 1, and the insertion hole 16 of the upper retaining wall block 1 is lowered. And piled on the first retaining wall block 1 in accordance with the joint pin 27 of FIG. In the same manner as described above, the earth and sand is put into the second-stage retaining wall block 1 and the back of the retaining wall block 1 is back-filled and rolled. In this way, the retaining wall blocks 1 whose lengths have been shortened sequentially are repeatedly piled up in the upper stage so that their front walls coincide with each other to complete a direct-stacking type retaining wall having a vertical wall 29 on the front surface. Further, as shown in FIG. 8A, an L-shaped block 12 can be further stacked on the uppermost retaining wall block 1 and its upper surface can be adjusted with earth and sand.

Next, as shown in FIG. 7, the construction of a greening type retaining wall in which the rear portions of the retaining walls formed of the side walls and the bottom wall of the retaining wall block are made vertical, and the front surface is stacked stepwise will be described. Also in this case, first, as the foundation work, the foundation earth and sand is dug and crushed stone 25 or quarry stone is laid and foundation concrete 26 is poured thereon. Next, the joint pin 27 is inserted into the second insertion hole 16 from the front of the first retaining wall block 1 and the last insertion hole 16, and a mortar having a thickness of 20 mm is laid on the foundation concrete 26. Then, the longest retaining wall block 1 of the first retainer is suspended and installed with a dedicated hanging bracket. Further, the embankment is poured into the first-stage retaining wall block 1, and the back portion of the retaining wall block 1 is backfilled and compacted. Next, the second retaining wall block 1 having a length of 500 mm shorter than that of the first retaining wall block 1 has its rear portion perpendicular to the rear portion of the first retaining wall block 1. In this way, the insertion holes 16 of the upper retaining wall block 1 are aligned with the lower joint pins 27 and stacked on the first retaining wall block 1. As a result, the front walls of these upper and lower retaining wall blocks are stacked in a stepwise manner, with the upper stage retreating 500 mm from the lower stage. In the same manner as described above, the earth and sand is put into the second-stage retaining wall block 1 and the back of the retaining wall block 1 is back-filled and rolled. In this way, the retaining wall blocks 1 whose lengths are shortened successively in the upper row are repeatedly piled up so that the rear portions of the lengths are aligned, thereby completing a greening type retaining wall having a planting portion 30 having a length of 500 mm on the front surface. Where appropriate, the front of the foundation of these retaining walls is embankment 28. As described above, the front part of each retaining wall block of the greening type retaining wall is the planting section 30 where the planting can be performed, so that a naturally friendly retaining wall can be provided. When the greening type retaining wall is formed, as shown in FIG. 8B, the L-shaped block 12 can be stacked on the uppermost stage. The wall block 1 has a length of 1500 mm to secure a place for the planting section 30.
Shall be

[0023]

As described above, the retaining wall block according to the present invention has the advantages that the assembling work is simple, there is no left and right displacement or front and rear displacement, and the front wall is reliably reinforced. Despite its high strength against loads from the ground, it is lightweight, inexpensive, safe, can be stacked as a vertical wall, and the entire surface can be stacked vertically as a stepped greening type, and It is a retaining wall block that can achieve excellent effects such as being able to be stacked on a curved wall that is curved in the horizontal direction.

[Brief description of the drawings]

FIG. 1 is a perspective view of a retaining wall block stacked on the uppermost stage of the present invention, in which (a) is a view from the front side, and (b) is a view from the back side.

FIGS. 2A and 2B are perspective views of a retaining wall block in which a hole is formed in a side wall and a bottom wall of the retaining wall block, where FIG. 2A is a view from the front side and FIG. 2B is a view from the back side.

3 (a) is a front view, FIG. 3 (b) is a rear view, and FIG. 3 (c) is a bottom view.

4 (a) is a sectional view taken along line XX in the front view of FIG. 3, FIG. 4 (b) is a right side view,
(C) is a plan view.

FIG. 5 shows a plan view and a bottom view of the bottom wall and the lateral wall of the retaining wall block having different lengths in the holding direction.

FIG. 6 is a side view showing an example in which retaining wall blocks having different lengths are stacked to form a straight wall stack.

FIG. 7 is a side view showing an example in which retaining walls having different lengths are stacked in a greening type by stacking front walls in a stepwise manner.

FIGS. 8A and 8B are side views showing an example in which an L-shaped block is placed on the top and constructed, and FIG. 8A shows a straight wall type and FIG. 8B shows a greening type.

[Explanation of symbols]

1 retaining wall block 2 front wall 3
Side wall 4 Bottom wall 5 Front wall side edge 6
Front wall center 7 Front wall back 8 Bottom wall bottom 9
Ridge 10 end side concave bottom 11 center concave bottom 12
L-shaped block 13 Side 14 Side 15
Side wall-like surface 16 Insertion hole 17 Removal hole 18
Drainage hole 19 Drainage hole 20 Overlay 21
Hardfacing part 22 Hardfacing part 23 Hardfacing part 24
Chamfer 25 Crushed stone 26 Foundation concrete 27
Joint pin 28 embankment 29 vertical wall 30
Planting department

Claims (5)

(57) [Claims] 1. A retaining wall block 1 having a front wall 2, left and right lateral walls 3, 3 extending rearward from the front wall 2, and a bottom wall 4 and being stacked up and down and left and right to form a retaining wall. , 3
Are provided on the front wall back surface 7 between the left and right front wall side ends 5 and the front wall central portion 6, respectively, the upper surface 15 of the side wall 3 is slightly higher than the upper surface of the front wall 2, and the lower surface 8 of the bottom wall is separated and rearward. 2 having two convex stripes 9, 9 extending to
, And a side surface 13 of the two ridges 9 engages with a side surface 14 of the lateral wall 3 of the retaining wall block 1 stacked below. In addition, the upper surface 15 of the horizontal wall rests the end bottom 10 of the retaining wall block stacked on the upper side, and the horizontal wall 3 has a plurality of insertion holes 16 in the upper and lower surfaces in the vertical direction. The retaining wall blocks 1, 1 stacked vertically are fixed by passing through them. 2. The retaining wall block 1 according to claim 1, wherein the lateral walls 3, 3 have a plurality of left and right through holes 17 and a central concave bottom portion 1.
The retaining wall block (1) according to claim 1, wherein a plurality of through holes (18) penetrating vertically are provided in the bottom wall (4) on one side, and a reinforcing bar is provided at a main part of each wall. 3. The retaining wall block 1 according to claim 1 or 2.
, The length of the retaining wall blocks 1 stacked on the lower side from the front wall 2 of the lateral wall 3 and the bottom wall 4 to the rear is from the lateral wall 3 of the retaining wall block 1 and the front wall 2 of the bottom wall 4 on the upper side. Retaining wall block 1 characterized by being longer than the length of the stay. 4. The retaining wall block 1 according to claim 1, wherein the length of the retaining wall block 1 stacked on the lower side from the side wall 3 and the front wall 2 of the bottom wall 4 to the rear side is an upper level. The retaining wall block 1 characterized in that it has the same length as the retaining wall from the front wall 2 of the retaining wall block 1 and the bottom wall 4 of the retaining wall block 1 to be piled up. 5. A plurality of insertion holes 16 are provided apart from each other in the holding direction of the lateral wall 3 so as to be able to adjust the position in the front-rear direction of the upper and lower retaining wall blocks 1, 1. The retaining wall block 1 according to claim 4.