JP7137861B2 - Concrete walls and concrete blocks - Google Patents

Description

The present invention relates to a concrete wall constructed by stacking concrete blocks and a concrete block used for construction of the concrete wall.

Concrete walls constructed by vertically stacking cuboid concrete blocks are known in the past, and are used as retaining walls for retaining earth on slopes, as landslide barriers, and as rockfall protection walls in the event of a disaster. ing. In such a concrete wall, if a part of the concrete blocks slides, the other concrete blocks will also slide, which may reduce the stability of the concrete wall as a whole. For this reason, the concrete blocks lined up in the horizontal direction are connected by connectors, and the concrete blocks lined up in the vertical direction (stacked) have their upper and lower edges engaged with each other, so that the overall stability of the concrete wall is increased. (See Patent Document 1 below, for example).

Japanese Unexamined Patent Application Publication No. 2002-227224

However, in the concrete wall body described in Patent Document 1, since it is assumed that the concrete blocks are arranged in a straight line in the horizontal direction, only the wall surface having a planar shape extending in the horizontal direction can be formed. I didn't. At the construction site of a concrete wall, various obstacles are often present in the construction area. It is desirable to be able to

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a concrete wall capable of forming a wall surface having not only a planar shape but also a curved shape, and a concrete block that can be used to construct such a concrete wall.

The concrete wall body of the present invention is a concrete wall body constructed by stacking a plurality of block layers composed of a plurality of horizontally arranged concrete blocks in the vertical direction, wherein each concrete block is oriented in one direction. It has grooves that extend upward and open on two side surfaces facing in the one direction, respectively, and has two protrusions that protrude downward on the lower surface side, and the two protrusions are one block on the lower layer side. Each of the two concrete blocks constituting the layer is fitted into the grooves, and the grooves form rainwater channels, and the rainwater that has entered is discharged from the ends of the grooves to the outside of the grooves. Let

The concrete block of the present invention has grooves extending in one direction and opening upward and two side surfaces facing in the one direction, and has two projections projecting downward on the lower surface side, When one side of the two protrusions is fitted into another groove having the same groove width as the groove, the other side of the two protrusions is moved in an arc trajectory centering on the protrusion on the one side. The groove forms a channel for rainwater, and rainwater that has entered is discharged from the end of the groove to the outside of the groove.

According to the present invention, it is possible to form a wall surface having not only a planar shape but also a curved shape.

The perspective view of the concrete wall body in Embodiment 1 of this invention (a) Perspective view (b) Plan view (c) Cross-sectional view of standard blocks used for constructing a concrete wall according to Embodiment 1 of the present invention (a) and (b) are perspective views showing examples of stacking upper standard blocks on lower standard blocks according to the first embodiment of the present invention. FIGS. 4A and 4B are side views and FIG. 4C are plan views showing a state in which one protruding portion of the standard block is fitted into the groove portion of the other standard block according to Embodiment 1 of the present invention. (a) and (b) are plan views showing examples of stacking upper standard blocks on lower standard blocks according to the first embodiment of the present invention. (a) and (b) are perspective views showing examples of stacking upper standard blocks on lower standard blocks according to the first embodiment of the present invention. (a) and (b) are plan views showing examples of stacking upper standard blocks on lower standard blocks according to the first embodiment of the present invention. (a) A diagram showing a virtual wall surface line (b) A plan view of the lowest block layer arranged along the virtual wall surface line Top view of two standard block layers (a) Front view (b) Plan view of part of the concrete wall according to Embodiment 1 of the present invention The perspective view of the concrete wall body in Embodiment 2 of this invention (a) Perspective view (b) Plan view (c) Sectional view of foundation blocks used for constructing a concrete wall according to Embodiment 2 of the present invention (a) and (b) are perspective views showing examples of stacking standard blocks on foundation blocks according to the second embodiment of the present invention. (a) and (b) are perspective views showing examples of stacking standard blocks on foundation blocks according to the second embodiment of the present invention. (a) and (b) are plan views showing examples of stacking standard blocks on foundation blocks according to the second embodiment of the present invention. The perspective view of the concrete wall body in Embodiment 3 of this invention (a) and (b) are perspective views showing a procedure for forming a lowermost block layer from foundation blocks according to Embodiment 3 of the present invention. (a) and (b) are perspective views showing a procedure for stacking standard blocks on a lower base block in Embodiment 3 of the present invention. (a) and (b) are perspective views showing the procedure for stacking standard blocks on the lower standard block in Embodiment 3 of the present invention. (a) and (b) are perspective views showing a procedure for forming a block layer from standard blocks according to the third embodiment of the present invention. (a) Front view (b) Plan view of part of the concrete wall body in Embodiment 3 of the present invention The side view of the concrete wall body in Embodiment 4 of this invention The side view of the concrete wall body in Embodiment 5 of this invention

(Embodiment 1)
FIG. 1 shows a concrete wall 1A according to Embodiment 1 of the present invention. The concrete wall 1A is constructed by vertically stacking a plurality of block layers each made up of a plurality of horizontally arranged concrete blocks. As the concrete block, the following standard block 10 is used in the first embodiment.

As shown in FIGS. 2(a) and 2(b), the standard block 10 is based on a substantially rectangular parallelepiped body portion 11 extending in the horizontal direction. A single groove 13 that opens upward and extends in one direction (longitudinal direction of the main body 11) is formed on the upper surface 12 side of the main body 11. As shown in FIG. As shown in FIG. 2(c) (a cross-sectional view viewed from the arrow V1-V1 in FIG. 2(b)), the bottom surface 14 of the groove 13 extends from the center CH in the longitudinal direction of the groove 13 to both ends TB. It has two slopes 14M that descend toward each other (see also FIG. 2(a)).

2(a) and 2(c), two protruding portions 16 protruding downward are provided on the side of the lower surface 15 of the main body portion 11. As shown in FIG. These two projecting portions 16 are arranged in a row in a direction parallel to the groove portion 13 provided on the upper surface 12 side.

The two projections 16 each consist of a downwardly narrowing truncated cone. Therefore, the cross section of each of the two projections 16 is circular, and the maximum diameter D (the connection portion with the lower surface 15, that is, the outer diameter of the base of the projection 16; is slightly smaller than the groove width W of (FIG. 2(b)).

In FIGS. 2A, 2B, and 2C, one of two side surfaces 11S facing the longitudinal direction of the main body 11 (that is, the longitudinal direction of the groove 13) has an outwardly protruding convex portion. 17 is provided, and the other of the two side surfaces 11S is provided with a concave portion 18 having a shape that can be engaged with the convex portion 17 (a shape obtained by inverting the shape of the convex portion 17). The convex portion 17 has a thickness T1 (FIG. 2(c)) corresponding to the thickness of the body portion 11 (the distance from the bottom surface 15 of the body portion 11 to the bottom surface 14 of the groove portion 13). Also, the recess 18 has a depth F1 corresponding to the thickness T1 (FIG. 2(c)).

In the concrete wall 1A, each standard block 10 constituting a relatively upper block layer has two protrusions in grooves 13 of the two standard blocks 10 constituting a relatively lower block layer. 16 are inserted one by one (FIG. 3(a)→FIG. 3(b). Specifically, the standard block 10 on the upper layer side has one side of the two protruding portions 16 on the two lower layer side. One of the standard blocks 10 is fitted into the groove 13, and the other of the two protrusions 16 is fitted into the other groove 13 of the two standard blocks 10 on the lower layer side.

As described above, the outer diameter of the base of the protrusion 16 is slightly smaller than the groove width W of the groove 13 . Therefore, there is some play between the protrusion 16 and the groove 13 into which the protrusion 16 is fitted, and the protrusion 16 is fitted into the groove 13 with play (that is, loosely fitted). It's becoming This play is caused by fitting the projecting portion 16 of the upper standard block 10 into the groove 13 of the lower standard block 10 when stacking the upper standard block 10 on the lower standard block 10. provided to facilitate

As shown in FIG. 4( a ), the standard block 10 has one side of the two projecting portions 16 attached to another groove portion (here, the groove portion 13 of the other standard block 10 ) having the same groove width W as the groove portion 13 . ), the other of the two projections 16 can be moved in the extending direction of the other groove into which the one projection 16 is fitted (Fig. 4 ( b), it can be moved in an arcuate trajectory (an arcuate trajectory in the horizontal plane) centering on the protrusion 16 on one side (arrow R in FIG. 4(c)). Therefore, even if the protruding portion 16 on one side of the standard block 10 is positioned within the groove portion 13 of the other standard block 10, the position of the protruding portion 16 on the other side is not determined by that alone. It is possible to select the position of the projecting portion 16 on the other side within a certain range. As shown in FIG. 4(c), when the protrusion 16 on one side is positioned at the end of the other groove, the protrusion 16 on the other end is fitted with the protrusion 16 on the one side. It is possible to move (move in an arc trajectory) within a range including the area outside the other groove (outside the side of the groove).

Therefore, as shown in FIG. 5(a), the standard block 10 has two projections 16 on the lower layer side where the longitudinal axes J1 and J2 intersect. Each can be fitted into the groove 13 of each of the two standard blocks 10 on the lower layer side (Fig. 5(b) and Figs. 6(a) and (b)). Further, as shown in FIG. 7(a), two projecting portions 16 are provided on each of the two lower standard blocks 10 whose longitudinal axes J1 and J2 are parallel to each other. It can be fitted into the groove 13 of each of the two standard blocks 10 (FIG. 7(b)).

That is, even if the two standard blocks 10 forming the lower block layer are not aligned in a straight line, the two protruding portions 16 of the standard block 10 are arranged on the lower two standard blocks 10 respectively. , and can be stacked across the two standard blocks 10 on the lower layer side.

The standard block 10 with the two projecting portions 16 fitted into the grooves 13 of the two standard blocks 10 on the lower layer side moves horizontally and collapses due to interference between the projecting portions 16 and the grooves 13. Regulated. For this reason, the stability of the standard block 10 on the upper layer side with respect to the standard block 10 on the lower layer side is extremely high. Therefore, it is necessary to have a shape and size that can restrict the horizontal movement and lodging of the standard block 10 on the upper layer side.

Here, since the cross-sectional shape of the protruding portion 16 is circular, the orientation of the upper standard block 10 with respect to the lower standard block 10 (the angle between the axes J1 and J2 of the two standard blocks 10 in plan view) First, the projecting portion 16 is fitted into the groove portion 13 in such a manner that the maximum portion of the outer diameter thereof is always brought close to the inner wall of the groove portion 13 . Therefore, regardless of the positional relationship of the upper standard block 10 with respect to the lower standard block 10, the stability of the standard block 10 on the upper layer side with respect to the lower standard block 10 can be enhanced.

The play formed between the projecting portion 16 of the standard block 10 on the upper layer side and the groove portion 13 of the standard block 10 on the lower layer side is from the viewpoint of increasing the stability of the standard block 10 on the upper layer side with respect to the standard block 10 on the lower layer side. Then, it is desirable to make it as small as possible. However, as described above, the play formed between the projecting portion 16 and the groove portion 13 is for making it easier to insert the projecting portion 16 into the groove portion 13, so the stability of the standard block 10 on the upper layer side is high. The size is determined from the viewpoint of both easiness of work and workability.

When constructing the concrete wall 1A in Embodiment 1, first, standard blocks 10 are arranged side by side on the ground JM (FIG. 1) to form the lowest block layer. Installation of the standard block 10 is performed, for example, by a heavy machine such as a crane. After forming the lowermost block layer, a second block layer is formed on the lowermost block layer.

The block layer of the second layer is formed by stacking one standard block 10 so as to straddle two adjacent standard blocks 10 out of the plurality of standard blocks 10 constituting the lowermost block layer. conduct. At this time, the two protruding portions 16 of the standard block 10 on the upper layer side enter (fit into) the groove portions 13 of the two standard blocks 10 on the lower layer side one by one (FIG. 3(a)→Fig. 3(b)). Even if the two standard blocks 10 on the lower layer side are not aligned linearly in a plan view, the standard blocks 10 on the upper layer side are stacked so as to straddle the two standard blocks 10 that are not aligned linearly. (FIG. 5(a)→FIG. 5(b) and FIG. 7(a)→FIG. 7(b)). The block layer above the second layer is also formed in the same manner.

When the concrete wall body 1A constructed in this manner is to have a curved shape (curved surface shape), the curved surface shape to be formed is assumed when arranging the lowermost block layer on the ground JM. This is projected onto the ground JM as a virtual wall surface line KL (FIG. 8A), and the standard blocks 10 are intermittently arranged along the projected virtual wall surface line KL on the ground JM (FIG. 8B). ). Then, the standard blocks 10 constituting the second block layer are stacked on the lowest block layer composed of the standard blocks 10 arranged along the imaginary wall surface line KL (FIG. 8(c)).

In the concrete wall body 1A formed in this manner, the standard blocks 10, which were arranged along the imaginary wall surface line KL and therefore were not arranged linearly in plan view, were similarly arranged along the imaginary wall surface line KL. Since the standard blocks 10 are piled up in the same orientation, the completed concrete wall 1A will have a wall surface with an assumed curved surface shape. Concrete wall 1A having a curved wall surface formed in this manner has at least one standard block 10 of each of two standard blocks 10 that are not aligned in a straight line and constitute a lower block layer. The two protruding portions 16 are inserted one by one into the groove portion 13 (FIGS. 5B and 7B).

As described above, the concrete wall 1A according to the first embodiment has a configuration in which a plurality of block layers each including a plurality of standard blocks 10 arranged in the horizontal direction are vertically stacked. Each standard block 10 has a groove portion 13 extending in one direction on the upper surface 12 side, and two projecting portions 16 projecting downward on the lower surface side. Each of the two standard blocks 10 constituting the side block layer is fitted into a groove 13 of each.

In each standard block 10, when one side of the two projecting portions 16 is fitted into another groove portion having the same groove width W as the groove portion 13 (for example, the groove portion 13 of another standard block 10), two The other side of the projecting portion 16 can be moved in an arc trajectory around the projecting portion 16 on the one side, and the projecting portion 16 on the one side is positioned in the groove portion 13 of the other standard block 10. Even if it is set to the other side, the position of the projecting portion 16 on the other side is not determined by that alone, and it is possible to select the position of the projecting portion 16 on the other side within a certain range. Therefore, even if the two standard blocks 10 constituting the block layer one layer below are not aligned in a straight line, the two protruding portions 16 are arranged in the grooves 13 of each of these two standard blocks 10. can be inserted one by one. For this reason, the concrete wall body 1A to be constructed can have a shape having not only a wall surface extending planarly in the horizontal direction, but also a wall surface extending in a curved surface in the horizontal direction.

By the way, as described above, the groove portion 13 of each standard block 10 of the concrete wall 1A constructed in this manner has two inclined surfaces that descend from the longitudinal central portion CH toward both ends TB. 14M (FIG. 2(c)). Therefore, rainwater that has entered the interior of the concrete wall 1A in rainy weather flows along the inclined surface 14M of each standard block 10 toward the end TB of the groove 13 (Fig. 9(a), ( b)), from the side surface 11S of the main body 11 of each standard block 10 and between the upper and lower standard blocks 10, along the outer surface of the main body 11 (that is, the concrete wall 1A) of each standard block 10, and finally It is ejected onto the ground JM.

As described above, in the concrete wall 1A according to the first embodiment, the inclined surfaces 14M of the grooves 13 of the standard blocks 10 form water channels (drainage channels). Rainwater can be drained to the outside of 1A, and rainwater can be managed appropriately.

(Embodiment 2)
FIG. 10 shows a concrete wall 1B according to Embodiment 2 of the present invention. A concrete wall 1B according to the second embodiment is obtained by replacing the concrete blocks constituting the lowest block layer of the concrete wall 1A shown in the first embodiment with foundation blocks 20 different from the standard blocks 10. .

As shown in FIGS. 11(a) and 11(b), the base block 20 is based on a substantially rectangular parallelepiped main body portion 21 extending in the horizontal direction, like the main body portion 11 of the standard block 10. As shown in FIG. Similarly to the body portion 11 of the standard block 10, a single groove portion 23 is formed on the upper surface 22 side of the body portion 21 of the base block 20 so as to open upward and extend in the longitudinal direction of the body portion 21. . As shown in FIG. 11(c) (a cross-sectional view viewed from the arrow V2-V2 in FIG. 11(b)), the bottom surface 24 of the groove 23 extends from the center CH in the longitudinal direction of the groove 23 to both ends TB. It has two slopes 24M that descend toward each other (see also FIG. 11(a)).

The width of the groove portion 23 of the base block 20 is set to the same size as the groove width W of the groove portion 13 of the standard block 10 (FIG. 11(b)). Therefore, the maximum diameter D of each of the two projecting portions 16 of the standard block 10 is slightly smaller than the groove width W of the groove portion 23 of the base block 20 . Therefore, when the standard block 10 is stacked on the base block 20 (Fig. 12(a) -> Fig. 12(b)), there is a slight gap between the projection 16 of the standard block 10 and the groove 23 of the base block 20. Play occurs, and the protruding portion 16 is fitted into the groove portion 23 with play (that is, loosely fitted), as in the case of the first embodiment (standard block 10).

11(a) and 11(c), instead of the two protruding portions 16 of the standard block 10, spikes consisting of a plurality of protrusions 26 arranged vertically and horizontally (for example, in a matrix) are provided on the underside of the base block 20. has a part. Each of these plurality of protrusions 26 has a truncated cone shape that narrows downward, and when the foundation block 20 is placed on the ground JM, it penetrates into the ground JM, thereby exhibiting a spike function to the ground JM. It's like

11(a), (b), and (c), one of the two side surfaces 21S facing the longitudinal direction of the body portion 21 of each base block 20 (that is, the longitudinal direction of the groove portion 23) protrudes outward. The other of the two side surfaces 21S is provided with a concave portion 28 having a shape that can be engaged with the convex portion 27 (a shape obtained by inverting the shape of the convex portion 27). . The convex portion 27 is formed in a shape having a constant thickness T2 downward from the lower surface 25 of the groove portion 23, and the concave portion 28 is positioned at a position corresponding to the convex portion 27 and has a thickness corresponding to the thickness T2 of the convex portion 27. It is formed in a shape having a depth F2 (FIG. 11(c)). That is, the bottom surface of the convex portion 27 and the bottom surface of the concave portion 28 are approximately the same height.

The standard block 10 of the second layer has two protruding portions 16 fitted (loosely) into the respective grooves 23 of the two base blocks 20 of the bottom layer. Specifically, the standard block 10 of the second layer has one side of the two protrusions 16 fitted into the groove 23 of one of the two base blocks 20 of the bottom layer, and the two protrusions 16 The other side of them is fitted into the groove 23 of the other of the two base blocks 20 of the bottom layer (FIG. 12(b)).

Here, since the groove portion 23 of the base block 20 has the same groove width W as the groove portion 13 of the standard block 10 , the protruding portion 16 on one side of the standard block 10 is positioned within the groove portion 13 of the base block 20 . Even if it is, the position of the projecting portion 16 on the other side is not determined by itself, and it is possible to select the position of the projecting portion 16 on the other side within a certain range.

When constructing the concrete wall body 1B in Embodiment 2, first, the bottom block layer is formed by arranging the foundation blocks 20 side by side on the ground JM. After forming the lowermost block layer, a second block layer is formed on the lowermost block layer. The block layer of the second layer is formed by stacking one standard block 10 so as to straddle two adjacent basic blocks 20 out of the plurality of basic blocks 20 forming the lowermost block layer. conduct. At this time, the two protruding portions 16 of the standard block 10 on the upper layer side enter (fit into) the groove portions 23 of the two base blocks 20 on the lower layer side one by one (FIG. 12(a)→Fig. 12(b)). As in the case of the first embodiment, even if the two base blocks 20 on the lower layer side are not aligned in a straight line in plan view, the standard blocks 10 on the upper layer side are stacked (Fig. 13(a) → 13(b) and 14(a)→FIG. 14(b) The block layer above the second layer is also formed in the same manner.

In addition to the effects of the concrete wall 1A in the first embodiment, the concrete wall 1B formed in this manner has the spikes in the base blocks 20 constituting the lowermost block layer, so that the ground JM is This has the effect of increasing the stability of the concrete wall 1B with respect to the ground JM when the ground is uneven.

In the concrete wall 1B according to the second embodiment as well, the inclined surface 14M of the groove portion 13 of each standard block 10 and the inclined surface 24M of the groove portion 23 of each foundation block 20 are used for the concrete wall 1A according to the first embodiment. A rainwater drainage channel is formed as in the case. Therefore, as in the case of the concrete wall body 1A in Embodiment 1, rainwater can be efficiently drained onto the ground JM, and rainwater discharge channel management can be performed appropriately.

(Embodiment 3)
FIG. 15 shows a concrete wall 1C according to the third embodiment. A concrete wall 1C according to Embodiment 3 is constructed using the standard blocks 10 and the foundation blocks 20 described above, and has only a wall surface that extends horizontally in a plane.

In the concrete wall 1C, when the bottom block layer is formed by the foundation blocks 20, the projection 27 of one of the two foundation blocks 20 arranged in a straight line is the same as that of the other foundation block 20. It is fitted into the concave portion 28 from above (FIG. 16(a)→FIG. 16(b)). As described above, since the bottom surface of the projection 27 and the bottom surface of the recess 28 are substantially the same height, the bottom surfaces 14 of the two adjacent base blocks 20 are aligned at substantially the same height. becomes.

Each standard block 10 constituting the block layer of the second layer is stacked so as to straddle two adjacent base blocks 20 on the lower layer side (bottom layer) (FIG. 17(a)→FIG. 17(b)). . Similarly, the standard block 10 on the layer side higher than the second layer is stacked so as to straddle the two standard blocks 10 on the layer side one layer below (FIG. 18(a)→FIG. 18(b)). Therefore, the standard blocks 10 constituting each block layer are arranged on the same straight line as the base blocks 20 arranged linearly on the bottom layer in plan view.

The standard blocks 10 that constitute the second layer and the upper block layers are engaged with each other by the protrusions 17 and the recesses 18 (FIG. 19(a)→FIG. 19(b)). , two standard blocks 10 positioned adjacent to each other are also positioned with high accuracy so as to be aligned linearly in plan view, and the wall surface shape of the concrete wall body 1C can be made into an accurate planar shape. In addition, since the standard blocks 10 in the same block layer restrict each other's lateral movement through the projections 17 and the recesses 18, the overall stability of the concrete wall 1C is extremely high.

Thus, in the third embodiment as well, the standard block 10 forming one block layer is placed in the groove 13 of each of the two standard blocks 10 forming the block layer one layer below (or in the two base blocks 20). Since the two protruding portions 16 are fitted one by one in the groove portion 23 of the upper layer side standard block 10, the outer surface of the protruding portion 16 of the upper layer side standard block 10 is in the groove portion 13 of the lower layer side standard block 10 (or the base block 20 By interfering with the inner surface of the groove portion 23), the movement and collapse of the standard block 10 (or the base block 20) on the lower layer side are restricted. Therefore, the stability of the standard block 10 on the upper layer side with respect to the standard block 10 on the lower layer side is extremely high as in the case of the first and second embodiments.

In the concrete wall body 1C according to the third embodiment as well, the rainwater that has entered the interior of the concrete wall body 1C flows along the inclined surface 14M of each standard block 10 toward the end portion TB side of the groove portion 13 ( 20(a) and 20(b)), the side surface 11S of the main body portion 11 of each standard block 10 and the outer surface of the main body portion 11 of the standard block 10 (that is, the concrete wall 1C) run from between the upper and lower standard blocks 10. flow. Then, it is finally discharged onto the ground JM (see the arrow shown in FIG. 20(a)). Therefore, in the concrete wall 1C, as in the case of the concrete walls 1A and 1B, rainwater can be efficiently drained onto the ground JM, and it is possible to appropriately manage rainwater discharge channels. .

(Embodiment 4)
FIG. 21 shows a concrete wall 1D according to the fourth embodiment. In the fourth embodiment, a deformed type basic block (designated as "20A") is used. The modified-type foundation block 20A has a plurality of grooves 23 (here, two) arranged parallel to each other. Standard blocks 10 are stacked in each of the plurality of grooves 23 so as to be aligned in the longitudinal direction of the grooves 23 . The concrete wall body 1D having such a structure has an extremely large overall thickness (dimension in the short side direction of the standard block 10). Therefore, at a disaster site or the like, it is possible to increase the durability against the earth and sand that has flowed.

(Embodiment 5)
FIG. 22 shows a concrete wall 1E according to the fifth embodiment. In the fifth embodiment, in addition to the modified-type base block 20A shown in the fourth embodiment, modified-type standard blocks (designated as "10A") are used. In the modified standard block 10A, a pair of side surfaces (longitudinal side surfaces 11H) extending in the longitudinal direction of the main body portion 11 and opposed to each other in the width direction (short side direction) of the main body portion 11 are parallel to each other, and the groove portion 13 is formed into the groove portion 13. It is slanted to one side in the width direction (the direction of the short side of the main body 21, which is the left-right direction in FIG. 22).

Since the concrete wall body 1E in Embodiment 5 is tilted from the vertical plane VM as shown in FIG. 22, it is suitable for use as a retaining wall for soil DJ having a slope. Here, the deformable standard block 10A is stacked on the deformable base block 20A shown in the fourth embodiment, but the grooves 23 shown in the second and third embodiments are one-by-one. It may be stacked on the base block 20 which is one.

As described above, in the concrete wall bodies 1A, 1B, 1C, 1D, and 1E shown in the above-described first and second embodiments, the concrete block (standard block 10) for constructing them is arranged on the upper surface 12 side. Two standard blocks 10 each having a groove portion 13 extending in a direction and having two projecting portions 16 projecting downward on the lower surface side. The grooves 13 (or the grooves 23 of the base block 20) are fitted one by one. Then, when one side of the two protrusions 16 is fitted into another groove having the same groove width W as the groove 13, the other side of the two protrusions 16 is placed at the center of the protrusion 16 on the one side. Therefore, even if the two standard blocks 10 that make up the next lower block layer are not aligned in a straight line, these two standard blocks Two projections 16 can be fitted into each groove 13 of 10 . For this reason, like the constructed concrete walls 1A and 1B, it is possible to have a shape having not only a wall surface extending horizontally in a planar manner but also a wall surface extending in a curved surface in the horizontal direction.

Further, the bottom surface 14 of the groove portion 13 of each standard block 10 has two inclined surfaces 14M that descend from the longitudinal central portion CH of the groove portion 13 toward both ends TB. The bottom surface 24 of the groove 23 of the groove 20 has two inclined surfaces 24M that descend from the longitudinal central portion CH of the groove 23 toward both ends TB. Since the grooves 13 of the standard block 10 and the grooves 23 of the foundation block 20 have the function of efficiently draining rainwater that has entered the concrete walls 1A, 1B, 1C, 1D, and 1E, rainwater discharge channels can be managed. can be done properly.

Although the embodiments of the present invention have been described so far, the present invention is not limited to those described above, and various modifications and the like are possible. For example, in Embodiments 1 to 5 described above, the two protruding portions 16 provided in each standard block 10 each have a truncated conical shape narrowing downward, but they may have a cylindrical shape. . Furthermore, although the cross section may be of a shape other than circular, if the cross section is circular, the positional relationship of the standard block 10 on the upper layer side with respect to the standard block 10 on the lower layer side (or the base block 10) may change. However, there is an advantage that the stability of the standard block 10 on the upper layer side can be improved with respect to the standard block 10 on the lower layer side.

In the above-described embodiment, each protrusion 16 provided on the standard block 10 is formed of one protrusion having a truncated cone shape, but a plurality of protrusions are gathered to form one protrusion. There may be. For example, a plurality of protrusions may be arranged in a circle to form one protrusion 16 . The protruding portion 16 provided on the standard block 10 is fitted into the groove portion 12 of the standard block 10 on the lower layer side (or the groove portion 23 of the base block 20), and the standard block 10 on the lower layer side of the standard block 10 having the protruding portion 16 (or the protruding portion 23) Since it fulfills the function of regulating movement and lodging with respect to the base block 20), even if a protruding object that does not fulfill the above function is provided on the underside of the standard block 10, Such protrusions do not correspond to the protrusions 16 of the present invention.

In addition, in the above embodiment, the bottom surface 14 of the standard block 10 has the inclined surface 14M, but this is not essential, and a horizontal surface without the inclined surface 14M may be used. Similarly, although the bottom surface 14 of the foundation block 20 has an inclined surface 24M, this is not essential and may be a horizontal surface without the inclined surface 24M.

It can be used not only when constructing a concrete wall urgently at a disaster site, but also when constructing a concrete wall normally.

1A, 1B, 1C, 1D, 1E Concrete Wall 10, 10A Standard Block 20, 20A Foundation Block 11S, 21S Side 12, 22 Top 13, 23 Groove 14, 24 Bottom 14M, 24M Inclined Surface 15, 25 Bottom 16 Projection 17, 27 convex portion 18, 28 concave portion 26 projection (spike portion)
CH center part TB end part

Claims (11)

A concrete wall constructed by stacking a plurality of block layers composed of a plurality of horizontally arranged concrete blocks in a vertical direction,
Each concrete block has grooves extending in one direction and opening upward and two side surfaces facing in the one direction, and two protrusions protruding downward on the lower surface side, and the two protrusions are fitted into the grooves of each of the two concrete blocks constituting the block layer one layer below,
The concrete wall body, wherein the groove forms a channel for rainwater, and rainwater that has entered is discharged from the end of the groove to the outside of the groove. In each concrete block, when one side of the two protrusions is fitted into another groove having the same groove width as the groove, the other side of the two protrusions is inserted into the protrusion on the one side. 2. The concrete wall according to claim 1, which can be moved in an arcuate trajectory around the . 3. The concrete wall according to claim 1, wherein the shape of each of the two projecting portions is a truncated cone shape narrowing downward or a cylindrical shape. 2. The at least one concrete block has the two protrusions fitted one by one into the grooves of each of the two non-linear concrete blocks constituting the block layer one lower layer. 4. The concrete wall according to any one of 1 to 3. 5. The concrete wall according to any one of claims 1 to 4, wherein the bottom surface of said groove portion has two inclined surfaces that descend from the center portion in the longitudinal direction of said groove portion toward both ends thereof. 6. The concrete wall according to any one of claims 1 to 5, wherein each concrete block constituting the lowermost block layer has a spike instead of the two protrusions. 7. The concrete wall according to claim 6, wherein said spike portion comprises a plurality of vertically and horizontally arranged protrusions having a shape protruding downward. Having grooves extending in one direction and opening upward and two side surfaces facing in the one direction, and having two projections projecting downward on the lower surface side,
When one side of the two protrusions is fitted into another groove having the same groove width as the groove, the other side of the two protrusions moves along an arcuate path centered on the protrusion on the one side. It is possible to move with
The concrete block, wherein the groove forms a channel for rainwater, and rainwater that has entered is discharged from the end of the groove to the outside of the groove. 9. The concrete block according to claim 8, wherein the shape of each of the two protrusions is a truncated cone shape or a cylinder shape that tapers downward. 10. The concrete block according to claim 8 or 9, wherein the bottom surface of the groove has two inclined surfaces that descend from the longitudinal center of the groove toward both ends. 2. The groove has a protrusion having a shape projecting outward on one of two side surfaces facing each other in the longitudinal direction, and a recess having a shape capable of engaging with the protrusion on the other of the two side surfaces. A concrete block according to any one of 8 to 10.

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