JP6959592B2 - block - Google Patents

Description

The present invention is a block used for constructing a connecting structure capable of preventing erosion of river embankments and coasts or collapse of slopes and slopes without adversely affecting the natural environment and waterside ecosystems. Regarding.

The applicant can effectively prevent erosion of the embankment of a river with many bends, and the revetment technology "revetment structure and its construction method" that does not adversely affect the natural environment or waterside ecosystem. (See, for example, Patent Document 1). The revetment structure described in Patent Document 1 includes a connecting structure formed by combining a plurality of T-shaped blocks 180 as shown in FIG. 25 and a plurality of construction-shaped blocks 190 as shown in FIG. 26. ing.

As shown in FIG. 25, the block 180 is a concrete material having a T-shaped plan view, and is used for rotational bearing in a direction crossing the vertical line portion 181 on the upper surface of the T-shaped vertical line portion 181. A groove portion 182 is provided, and protrusions 184 for rotation bearings having a size that can be fitted into the groove portion 182 are provided on the lower surfaces of the left and right end portions of the T-shaped horizontal line portion 183, respectively.

As shown in FIG. 26, the block 190 is a concrete material having a shape in a plan view, and one of the two horizontal line portions 191 and 192 constituting the work character has four horizontal line portions 191. It has a prismatic shape, and each of the lower surfaces of the left and right end portions of the other horizontal line portion 192 is provided with protrusions 193 for rotation bearings having a size that can be fitted into the groove portion 182 of the block 180 shown in FIG.

A plurality of blocks 180 are formed downward while fitting the protrusions of the other two blocks 180 into the groove 182 of the block 180 installed on the upper part of the river embankment, which is the construction target surface. When the blocks 190 are connected to each other and placed at the lowermost portion, a connecting structure that covers the surface to be constructed is formed.

After that, the space formed between the plurality of blocks 180 and the blocks 190 constituting the connecting structure is filled with earth and sand, and the upper surface of the blocks 180 and the block 190 is covered with earth and sand to construct a revetment structure. .. As time passes after construction, various plants grow on the earth and sand that fills the space of the connected structure and the earth and sand that covers the upper surface, and it becomes integrated with the embankment, so it has an excellent erosion prevention function. A revetment structure that does not disturb the natural landscape or waterside ecosystem is formed.

Japanese Unexamined Patent Publication No. 2010-31522

The block 180 shown in FIG. 25 and the block 190 shown in FIG. 26 can be used without any trouble when forming a connecting structure on the embankment of the straight portion of the river or the embankment of the curved portion where the river is gently curved. However, it may be difficult to form a connecting structure on the embankment where the river bends sharply.

Hereinafter, the reason will be described with reference to FIGS. 27 and 28. When the block 180 shown in FIG. 25 and the block 190 shown in FIG. 26 are used to form a connecting structure on the embankment of a part where the river bends sharply, for example, as shown in FIG. 27, a plurality of blocks are formed. It is necessary to combine the block 180 and the block 190 to form a fan-shaped connecting structure 200.

In the construction procedure in this case, first, a plurality of blocks 180a are arranged along the curved surface of the embankment along the flow direction of the river to form an arcuate array A. Next, a plurality of blocks 180b are connected while being arranged so as to form an arc along the arc-shaped array A of the block 180a to form an arc-shaped array B.

After that, as described above, a plurality of blocks 180c, 180d, 180e are sequentially arranged along the curved surface of the embankment to form arcuate arrays C, D, E, and finally, the plurality of blocks 190. If the arcuate array F is formed by arranging the arcuate array F along the arcuate array E, the connecting structure 200 is formed on FIG. 27, which is a plan view.

However, as shown in FIG. 27, in the connected structure 200, the radius of curvature of the arcuate arrays A to F decreases in this order, so that the length of each row of the arcuate arrays A to F in the arc direction is It becomes shorter from the arcuate array A to the arcuate array F. Therefore, in the arcuate arrangements A to F, the arrangement intervals of the blocks 180 (molding blocks 190) adjacent to each other in the arcuate direction need to be shortened in the order of the arcuate arrangements A to F.

On the other hand, since the length of the horizontal line portion 183 of the block 180 (the length of the horizontal line portions 191 and 192 of the block 190) is constant, the arrangement interval of the adjacent blocks 180 (block 190) is the horizontal line portion of the adjacent blocks 180. The minimum is when the ends of 183 (horizontal line portions 191 and 192 of the block 190) are in contact with each other, and the size cannot be made smaller than this.

Therefore, as shown in FIGS. 27 and 28, in the arcuate arrays E and F having a smaller radius of curvature than the arcuate arrays A to D, there is a portion R in which adjacent blocks 180 and blocks 190 overlap each other. .. Therefore, although the connecting structure 200 shown in FIGS. 27 and 28 can be drawn on the plan view, it cannot be actually constructed.

Therefore, the problem to be solved by the present invention is that it is possible to easily construct a high-strength revetment connecting structure in a curved region having a relatively small radius of curvature, such as a meandering river embankment or a curved coast. To provide blocks.

The block according to the present invention
Two connecting portions having a J-shaped concave groove in cross-sectional shape and arranged in parallel at a distance with the openings of the concave grooves facing in different directions by 180 degrees, and the two connecting portions. A block provided with a connecting portion for connecting the connecting portions between the portions.
Of the inner wall surface and the outer wall forming the concave groove, at least a part of the outer wall located at a position away from the joint portion can be fitted into the concave groove of another block having the same shape as the block. It is characterized by that.

In the block, it is desirable that the height of the outer wall is lower than the height of the inner side wall located near the joint.

In the block,
With at least a part of the outer bottom surface of one of the connecting portions
At least a part of the ridge of the inner wall of the concave groove of the other connecting portion can be located on the same virtual plane.

In the block, at least a part of the outer surface of the joint can be located on the virtual plane.

In the block, protrusions may be provided at a plurality of locations on the outer bottom surface of one of the connecting portions, the protruding edge of the inner wall of the other connecting portion, or the outer surface of the connecting portion.

In the block, the concave groove of one of the connecting portions is curved in an arc shape that is convex in the direction away from the joint portion, and the concave groove of the other connecting portion is a circle that is convex in the direction of approaching the joint portion. It can be curved in an arc shape.

In the block, at least a part of the outer wall of one of the connecting portions is provided with a portion in which the thickness of the outer wall increases from the central portion in the longitudinal direction of the outer wall toward both ends.
At least a part of the concave groove of the other connecting portion may be provided with a portion in which the groove width of the concave groove is reduced from the central portion in the longitudinal direction of the concave groove toward both ends.

In the block, at least a part of the concave groove of at least one of the two connecting portions is a portion in which the groove width of the concave groove is increased from the central portion in the longitudinal direction of the concave groove toward both ends. Can be provided.

In the block, at least a part of the concave groove of the connecting portion is provided with a portion in which the groove width of the concave groove increases toward the inner bottom surface of the concave groove.
At least a part of the outer wall of the connecting portion may be provided with a portion in which the thickness of the outer wall increases toward the ridge portion of the outer wall.

In the block, the longitudinal direction of the concave groove is formed on the inner surface of the outer wall of one of the connecting portions and the inner surface of the inner side wall, and on the outer and inner surfaces of the outer wall of the other connecting portion. It can be provided with a wavy surface or a sawtooth surface that repeats unevenness along the surface.

In the block, the upright surfaces located at both ends of the concave groove of the two connecting portions are tapered so as to continuously approach each other from the outer wall of one connecting portion toward the outer wall of the other connecting portion. Can be made.

In the block, a concave curved surface along the concave shape of the inner bottom surface is provided on at least a part of the inner bottom surface of the concave groove.
A convex curved surface along the convex shape of the ridge can be provided on at least a part of the ridge of the outer wall.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a block capable of easily constructing a high-strength revetment connecting structure in a curved region having a relatively small radius of curvature such as a meandering river embankment or a curved coast.

It is a perspective view which shows the block which is an embodiment of this invention. It is a perspective view which looked at the block shown in FIG. 1 from a different direction. It is a perspective view which looked at the block shown in FIG. 1 from a different direction. It is a side view of the block seen from the arrow X direction in FIG. It is a perspective view which shows the connection process of the block shown in FIG. It is a top view which shows the connection structure of the block shown in FIG. It is a side view which shows the connection structure of the block shown in FIG. It is a partially omitted plan view which shows the connection structure formed by connecting the blocks shown in FIG. It is a partially omitted plan view which shows the other connection structure formed by connecting the blocks shown in FIG. 1. It is a side view which shows the connection structure of the block which is another embodiment. It is a top view which shows the block which is another embodiment. It is a bottom view of the block shown in FIG. It is a side view of the block seen from the arrow S direction in FIG. It is a front view of the block seen from the arrow line T direction in FIG. It is a rear view of the block seen from the arrow U direction in FIG. It is a top view which shows the arrangement state of the block shown in FIG. It is a partially omitted plan view which shows the connection structure formed by connecting the blocks shown in FIG. It is a top view which shows the block which is another embodiment. It is a top view which shows the connection state of the block shown in FIG. It is a top view which shows the connection state after the connection state of the block shown in FIG. 19 changes. It is a top view which shows the block which is another embodiment. It is a side view which shows the block which is another embodiment. It is a side view which shows the connected state of the block shown in FIG. It is a top view which shows the block which is another embodiment. It is a perspective view which shows the conventional T-shaped block. It is a perspective view which shows the block of the conventional construction type. It is a top view which shows the virtual connection structure formed by connecting the conventional T type block and the work type block. It is a partially enlarged view of FIG. 27.

Hereinafter, blocks 10, 20, 30, 40, 50, 60, and 70, which are embodiments of the present invention, will be described with reference to FIGS. 1 to 24. Blocks 10, 20, 30, 40, 50, 60, 70 are made of concrete, but are not limited thereto.

First, the block 10 will be described with reference to FIGS. 1 to 9. As shown in FIGS. 1 to 4, the block 10 has a shape in a plan view when placed on the construction target surface G (see FIG. 4). In the block 10, two connecting portions 13 (14) having a concave groove 11 (12) having a J-shaped cross section and an opening portion 11a (12a) of the concave groove 11 (12) differ from each other by 180 degrees. It is provided with a connecting portion 15 for integrally connecting the connecting portions 13 and 14 between two connecting portions 13 and 14 arranged in parallel at a distance from each other in a facing state. In the following paragraphs, the connecting portion 13 in which the opening portion 11a of the concave groove 11 is in the downward state is described as the inverted connecting portion 13, and the connecting portion 14 in which the opening portion 12a of the concave groove 12 is in the upward state is connected upright. There is a part described as part 14.

As shown in FIG. 4, of the inner side wall 11b (12b) and the outer wall 11c (12c) forming the concave groove 11 (12) of the connecting portion 13 (14), the outer wall located at a position away from the connecting portion 15. The height 11h (12h) of 11c (12c) is lower than the height 11H (12H) of the inner side wall 11b (12b) located closer to the joint portion 15. Here, the height 11h (12h) of the outer wall 11c (12c) is from the inner bottom surface 11d (12d) of the concave groove 11 (12) to the ridge portion 11e (12e) of the outer wall 11c (12c), respectively. The distance, which is the height 11H (12H) of the inner side wall 11b (12b), is from the inner bottom surface 11d (12d) of the concave groove 11 (12) to the ridge portion 11f (12f) of the inner side wall 11b (12b), respectively. The distance of.

Further, since the maximum thickness 11t (12t) of the outer wall 11c (12c) is smaller than the minimum width 12w (11w) of the concave groove 12 (11), as shown in FIGS. 6 and 7 described later, the outer wall The entire vicinity of the ridge portion 11e (12e) of the 11c (12c) can be fitted into the concave groove 12 (11) of another block 10 having the same shape as the block 10.

As shown in FIGS. 2 and 3, in the block 10, the flat surface portion of the outer bottom surface 14a of one upright connecting portion 14 and the ridge portion 11f of the inner wall 11b of the concave groove 11 of the other inverted connecting portion 13. And the outer surface 15a of the coupling portion 15 are located on the same virtual plane. Further, the outer bottom surface 13a of the inverted connecting portion 13 and the flat surface portion of the ridge portion 12f of the inner side wall 12b of the concave groove 12 of the upright connecting portion 14 are located on the same virtual plane.

As shown in FIG. 2, in the block 10, the lengths 13L and 14L of the recessed grooves 11 and 12 of the two connecting portions (inverted connecting portion 13 and upright connecting portion 14) in the longitudinal direction are equivalent. Further, as shown in FIG. 4, the inner side surfaces 11g and 12g of the inner side walls 11b and 12b of the concave grooves 11 and 12 approach the joint portion 15 as they move away from the inner bottom surfaces 11d and 12d, respectively (concave grooves 11 and 12). Is inclined in the direction of widening).

As shown in FIG. 4, a chamfered portion 12j is provided at a portion of the inner wall surface 12b of the upright connecting portion 14 near the connecting portion 15 of the ridge portion 12f, and the outer bottom surface 14a and the outer wall 12c of the upright connecting portion 14 are provided. A chamfered portion 12k is provided at the boundary portion with the outer surface surface 12m of the above.

Next, the connected structure of the plurality of blocks 10 and the connected structures 100 and 110 constructed by using the plurality of blocks 10 will be described with reference to FIGS. 1 to 4 and 5 to 9.

As shown in FIG. 5, the outer walls 11c and 11c of the inverted connecting portions 13 and 13 of the two blocks 10y and 10z are opposed to the concave groove 12 of the upright connecting portion 14 of the block 10x installed on the construction target surface G. The ridges 11e and 11e are fitted into the ridges 11e and 11e, respectively, and the ridges 12e of the outer wall 12c of the block 10x are fitted into the recesses 11 and 11 of the two blocks 10y and 10z, respectively.

As a result, the blocks 10x and the blocks 10y and 10z are connected to each other in the states shown in FIGS. 6 and 7. In addition, in FIGS. It has the same shape and size.

As shown in FIG. 4, in the block 10, the maximum thickness 11t of the outer wall 11c is smaller than the minimum width 12w of the concave groove 12, and the maximum thickness 12t of the outer wall 12c is smaller than the minimum width 11w of the concave groove 11. It's small. Therefore, as shown in FIGS. 6 and 7, the ridges 11e and 11e of the outer walls 11c and 11c of the blocks 10y and 10z are fitted into the concave grooves 12 of the other blocks 10x having the same shape as the blocks 10y and 10z. It is possible, and the ridge portion 12e of the outer wall 12c of the block 10x can be fitted into the concave groove 11 of the other blocks 10y and 10z.

As described above, in the block 10, the maximum thickness 11t of the outer wall 11c is smaller than the minimum width 12w of the concave groove 12, and the maximum thickness 12t of the outer wall 12c is smaller than the minimum width 11w of the concave groove 11. Therefore, when the blocks 10x, 10y, and 10z are connected as shown in FIGS. 6 and 7, a gap is formed between the concave groove 12 of the block 10x and the outer walls 11c and 11c of the blocks 10y and 10z. A gap is also formed between the outer wall 12c of the block 10x and the recesses 11 and 11 of the blocks 10y and 10z.

Therefore, as shown in FIG. 6, the connecting postures of the blocks 10y and 10z with respect to the block 10x are the direction in which the blocks 10y and 10z slide relatively along the longitudinal direction of the concave grooves 11 and 12 and the interconnection direction along the construction target surface G. The direction of sliding relative to P and the direction Q of rotation on the construction target surface G can be changed. Therefore, it is possible to connect the blocks 10y and 10z in a state in which the longitudinal directions of the concave grooves 11 and 11 are oblique to the longitudinal direction of the concave groove 12 of the block 10x (non-parallel state).

Therefore, with respect to the plurality of blocks 10 arranged so that the longitudinal direction of the concave groove 12 of the upright connecting portion 14 forms a part of the arc (so as to form a part of the tangent of the arc), a plurality of other blocks. It can be connected so that the longitudinal direction of the concave groove 11 of the inverted connecting portion 13 of 10 forms a part of the arc (so as to form a tangent to the arc). Further, as shown in FIG. 6, since the two blocks 10y and 10z can slide in the longitudinal direction of the respective concave grooves 11 and 11 with respect to the concave groove 12 of the block 10x, the blocks 10y and 10z are of each other. The connection position can be adjusted by changing the arrangement interval.

Therefore, as shown in FIG. 8, by connecting and arranging a plurality of blocks 10 in combination, it is possible to construct a connecting structure 100 having a fan shape in a plan view.

When constructing the connecting structure 100 shown in FIG. 8, first, a plurality of blocks 10 are arranged along the curved surface of the embankment and along the flow direction of the river to form an arcuate array 1. Next, while arranging the plurality of blocks 10 so as to form an arc along the arc-shaped array 1 of the blocks 10, each block 10 of the arc-shaped array 1 is arranged in the manner shown in FIGS. 5 and 6. They are connected to form an arcuate array 2.

Next, while arranging a plurality of blocks 10 in an arc shape along the arcuate arrangement 2 of the blocks 10, in the same manner as described above, the blocks 10 of the arcuate arrangement 2 are respectively arranged in the same manner as shown in FIGS. A plurality of blocks 10 are connected to form an arcuate array 3.

Next, while arranging a plurality of blocks 10 in an arc shape along the arc-shaped array 3 of the blocks 10, they are connected to the blocks 10 of the arc-shaped array 3 to form the arc-shaped array 4. When forming the arc arrangements 2, 3 and 4, the number of blocks 10 arranged is not limited. Therefore, the number of blocks 10 corresponding to the length of the arc arrangements 2, 3 and 4 in the arc direction should be arranged at appropriate intervals. Can be done. After that, by arranging the plurality of blocks 10 in an arc shape in the manner shown in FIGS. 5 and 6 described above, the arc-shaped arrays 5 and 6 are formed, and finally, if the arc-shaped array 7 is formed, they are connected. The structure 100 is completed.

As shown in FIG. 8, in the connected structure 100, the radii of curvature of the arcuate arrays 1 to 7 decrease in this order, and the length of each row of the arcuate arrays 1 to 7 in the arc direction is the arcuate array. It becomes shorter from 1 toward the arcuate array 7. Therefore, in the arcuate arrangements 1 to 7, the arrangement interval of the blocks 10 adjacent to each other in the arcuate direction needs to be shortened in the order of the arcuate arrangements 1 to 7.

However, when a plurality of blocks 10 are arranged in a plurality of rows in an arc shape to form a connected structure, the number of blocks 10 arranged in the subsequent step is limited to the number of blocks 10 arranged in the previous step. Therefore, by arranging the number of blocks 10 according to the length in the arc direction, it is possible to avoid the occurrence of overlapping R (see FIG. 28) between the blocks, whereby the radius of curvature is relatively large. Even in a small curved region, a high-strength connecting structure 100 for shore protection can be easily constructed.

When a plurality of blocks 10 are arranged in an arc shape to form a connected structure, the arrangement interval of the blocks 10 adjacent to each other in the arc direction and the arrangement position with respect to the blocks 10 in the front row are not limited to the state shown in FIG. It is also possible to construct the connecting structure 110 as shown in FIG.

Next, blocks 20, 30, 40, 50, 60, 70, which are other embodiments of the present invention, will be described with reference to FIGS. 10 to 24. In the portions constituting the blocks 20, 30, 40, 50, 60, 70 shown in FIGS. 10 to 24, the portions common to the portions constituting the block 10 described above are designated by reference numerals in FIGS. 1 to 9. There is a place where the explanation is omitted by adding the same code as.

In the block 20 shown in FIG. 10, concave curved surfaces 11s and 12s are provided on the inner bottom surfaces of the concave grooves 11 and 12 along the concave shape of the inner bottom surface, and the ridges 11e and 12e of the outer walls 11c and 12c are provided with ridges. Convex curved surfaces 11r and 12r are provided along the convex shape of the portions 11e and 12e.

Therefore, as shown in FIG. 10, when connecting the plurality of blocks 20 and 20, the connecting portion between the connecting portion 14 of one block 20 and the connecting portion 13 of the other block 20 is changed in a hinge shape. , The connecting postures of each other can be changed. Therefore, even if there is a curved portion V in the middle of the construction target surface G, it can be connected in a bent state along the curved portion V, and the plurality of blocks 20, 20 can be reliably and stably connected to each other. be able to.

Next, the block 30 which is another embodiment will be described with reference to FIGS. 11 to 17. The block 30 has a shape in a plan view when placed on the construction target surface G1. In the block 30, the inverted connecting portion 33 (upright connecting portion 34) having the concave groove 31 (32) having a J-shaped cross section and the opening portion 31a (32a) of the concave groove 31 (32) are 180 degrees from each other. With the inverted connecting portion 33 and the connecting portion 35 that integrally connect the inverted connecting portion 33 and the upright connecting portion 34 between the inverted connecting portion 33 and the upright connecting portion 34 arranged in parallel at different distances while facing different directions. , Is equipped.

As shown in FIG. 13, of the inner side wall 31b (32b) and the outer wall 31c (32c) forming the concave groove 31 (32) of the inverted connecting portion 33 (upright connecting portion 34), they are separated from the connecting portion 35. The height of the outer wall 31c (32c) at the position is lower than the height of the inner side wall 31b (32b) at the position closer to the joint 35.

Further, since the maximum thickness of the outer wall 31c (32c) is smaller than the minimum width of the concave groove 32 (31), the entire vicinity of the ridge portion 31e (32e) of the outer wall 31c (32c) is the block 30. It can be fitted into the concave groove 32 (31) of another block 30 having the same shape as the above.

As shown in FIGS. 12 to 15, two protrusions 36 are provided on the outer bottom surface 34a of one upright connecting portion 34, and the protruding edge portion 31f of the inner side wall 31b of the concave groove 31 of the other inverted connecting portion 33. Is provided with two protrusions 37. The two protrusions 36 are provided on the outer bottom surface 34a of the upright connecting portion 34 near the end of the outer wall 32c in the longitudinal direction, and the two protrusions 37 are respectively inside the inverted connecting portion 33. It is provided in a portion of the wall 31b near the end of the ridge portion 31f. The approximate shapes of the protrusions 36 and 37 are quadrangular pyramid trapezoids, respectively.

Since the block 30 has four protrusions 36, 36, 37, 37, as shown in FIGS. 14 and 15, when a convex curved surface portion exists on the construction target surface G1 on which the block 30 is placed, By bringing these protrusions 36, 36, 37, 37 into contact with the construction target surface G1, the block 30 can be stably held. Since the shapes, numbers, positions, etc. of the protrusions 36 and 37 are not limited, they can be arbitrarily set according to the condition of the surface to be constructed.

As shown in FIGS. 11 and 12, in the block 30, the concave groove 31 of one inverted connecting portion 33 is curved in an arc shape forming a convex shape in a direction away from the connecting portion 35, and the other upright connecting portion 34. The concave groove 32 is curved in an arc shape that is convex in the direction approaching the joint portion 35. Therefore, as shown in FIG. 16, the radius of curvature of the concave groove 31 (recessed groove 32) is set along the radius of curvature R1, R2 (R3, R4) of the arcuate arrangement to be formed on the construction target surface G2. If the block 30 is formed in this way, as shown in FIG. 17, a high-strength connecting structure 120 for shore protection can be easily constructed even in a curved region where the radius of curvature of the construction target surface G2 is small.

In the block 30, as shown in FIGS. 11 and 12, the standing surfaces 34x and 34x located at both ends of the concave groove 32 of the upright connecting portion 34 and both ends of the concave groove 31 of the inverted connecting portion 33 are located. The upright surfaces 33x and 33x form a taper shape that continuously approaches each other from the outer wall 31c of one inverted connecting portion 33 toward the outer wall 32c of the other upright connecting portion 34.

Therefore, as shown in FIGS. 16 and 17, the taper angles of the upright surfaces 34x and 34x of the upright connecting portion 34 along the direction of the radius of curvature R5 of the arcuate arrangement to be formed on the construction target surface G2. Further, if the blocks 30 are formed by setting the taper angles of the upright surfaces 33x and 33x of the inverted connecting portion 33, as shown in FIG. 17, a plurality of blocks 30 can be arranged without gaps in the arc direction. Even in a curved region where the radius of curvature of the construction target surface G2 is small, an extremely strong connecting structure 120 for shore protection can be constructed.

Next, the block 40, which is another embodiment, will be described with reference to FIGS. 18 to 20. The block 40 has a shape in a plan view when placed on the construction target surface G3. In the block 40, the inverted connecting portion 43 (upright connecting portion 44) having the concave groove 41 (42) having a J-shaped cross section and the opening portion 41a (42a) of the concave groove 41 (42) are 180 degrees from each other. A connecting portion 45 that integrally connects the inverted connecting portion 43 and the upright connecting portion 44 between the inverted connecting portion 43 and the upright connecting portion 44 arranged in parallel at different distances while facing different directions. , Is equipped.

Of the inner side wall 41b (42b) and the outer wall 41c (42c) forming the concave groove 41 (42) of the inverted connecting portion 43 (upright connecting portion 44), the outer wall 41c (the outer wall 41c) located at a position away from the connecting portion 45 ( The height of 42c) is lower than the height of the inner side wall 41b (42b) located closer to the joint portion 45.

As shown in FIG. 18, in the block 40, the thickness 41t of the outer wall 41c of one of the inverted connecting portions 43 continuously increases from the central portion in the longitudinal direction of the outer wall 41c toward both ends. The groove width 42w of the concave groove 42 of the other upright connecting portion 44 is continuously reduced from the central portion in the longitudinal direction of the concave groove 42 toward both ends.

As shown in FIG. 18, the maximum thickness of both ends of the outer wall 41c where the thickness 41t of the outer wall 41c of the inverted connecting portion 43 is maximum is the groove width 42w of the concave groove 42 of the upright connecting portion 44. It is smaller than the groove width at the center of the concave groove 42 and larger than the groove widths at both ends of the concave groove 42 at which the groove width 42w is the minimum.

Further, the thickness of both ends of the outer wall 42c having the maximum thickness 42t of the outer wall 42c of the upright connecting portion 44 is the thickness of the concave groove 41 having the maximum groove width 41w of the concave groove 41 of the inverted connecting portion 43. It is smaller than the groove width in the central portion and larger than the groove widths at both ends of the concave groove 41 in which the groove width 41w is the minimum.

Therefore, as shown in FIG. 19, with respect to the concave groove 42 of the upright connecting portion 44 of the block 40x placed on the construction target surface G3, the inverted connecting portion 43 of another block 40y having the same shape as the block 40x. The outer wall 41c of the above can be fitted in a state of being displaced by half the length of the outer wall 41c. At the same time, the outer wall 42c of the upright connecting portion 44 of the block 40x is fitted into the concave groove 41 of the inverted connecting portion 43 of the block 40y in a state of being displaced by half the length of the outer wall 42c. The blocks 40x and 40y have the same shape as the block 40 shown in FIG.

As a result, the blocks 40x and 40y are connected on the construction target surface G3 in a state of being displaced by half the length of the concave grooves 41 and 42 in the length direction of the concave grooves 41 and 42. In the state shown in FIG. 19, there is a gap between the concave groove 42 of the block 40x and the outer wall 41c of the block 40y, and there is a gap between the outer wall 42c of the block 40x and the concave groove 41 of the block 40y. exist.

Therefore, similar to the connection posture of the block 10y with respect to the block 10x shown in FIG. 6, the blocks 40x and 40y slide relatively along the longitudinal direction of the concave grooves 41 and 42 and each other along the construction target surface G3. The direction of sliding relative to the connecting direction P (see FIG. 6) and the direction Q of rotation on the construction target surface G3 (see FIG. 6) can be changed. Therefore, it is possible to connect the block 40y in a state in which the longitudinal direction of the concave groove 41 of the block 40y is oblique to the longitudinal direction of the concave groove 42 of the block 40x (non-parallel state), and a plurality of blocks 40 are combined. As a result, the connected structure 100 as shown in FIG. 8 can be constructed.

Further, as shown in FIG. 18, in the block 40, the thickness of both ends of the outer wall 41c of the inverted connecting portion 43 is larger than the groove width of both ends of the concave groove 42 of the upright connecting portion 44. The thickness of both ends of the outer wall 42c of the upright connecting portion 44 is larger than the groove width of both ends of the concave groove 41 of the inverted connecting portion 43. Therefore, even if a force in the longitudinal direction of the concave grooves 41 and 42 is applied to one of the connected blocks 40x and 40y as shown in FIG. 19, the blocks 40x and 40y are not separated.

Therefore, as shown in FIG. 19, a force in the longitudinal direction of the recesses 41 and 42 is applied to one of the blocks 40x and 40y connected on the construction target surface G3 due to the water flow of the river or the sediment flow, and FIG. As shown in FIG. 20, even when the connected state of the blocks 40x and 40y may change relatively in the length direction of the concave grooves 41 and 42, it is possible to prevent the blocks 40x and 40y from separating. can. Therefore, it is possible to construct a connected structure that does not easily collapse when the river is flooded or flooded.

Next, the block 50, which is another embodiment, will be described with reference to FIG. In the block 50 shown in FIG. 21, the groove width 51w of the concave groove 51 provided in the inverted connecting portion 53 continuously widens from the central portion in the longitudinal direction of the concave groove 51 toward both ends, and is connected upright. The groove width 52w of the concave groove 52 provided in the portion 54 continuously widens from the central portion in the longitudinal direction of the concave groove 52 toward both ends. Specifically, the inner side surfaces 51a and 51b forming the concave groove 51 and the inner side surfaces 52a and 52b forming the concave groove 52 both have a smooth convex curved surface having an arcuate shape in a plan view.

As described above, the groove widths 51w and 52w of the concave grooves 51 and 52 of the block 50 are continuously widened from the central portion in the longitudinal direction of the concave grooves 51 and 52 toward both ends, respectively, whereby a plurality of groove widths 51w and 52w are formed. When the blocks 50 are arranged in combination as shown in FIG. 6 to form a connected structure, the blocks 50 can be rotated in the direction Q (see FIG. 6) to rotate on the construction target surface G (see FIG. 6). Since the range is widened, the function for dealing with arcuate arrangements with a small radius of curvature is improved. In the concave grooves 51 and 52, the regions where the respective groove widths 51w and 52w widen extend from the central portion to both ends of the concave grooves 51 and 52, but the present invention is not limited to this. It is also possible to provide a region in which the groove widths 51w and 52w are widened only in the region near both ends.

Next, the block 60, which is another embodiment, will be described with reference to FIGS. 22 and 23. As shown in FIG. 22, the block 60 has a shape in a plan view when placed on the construction target surface G4. In the block 60, the inverted connecting portion 63 (upright connecting portion 64) having the concave groove 61 (62) having a concave cross-sectional shape and the opening portion 61a (62a) of the concave groove 61 (62) are 180 degrees to each other. A connecting portion 65 that integrally connects the inverted connecting portion 63 and the upright connecting portion 64 between the inverted connecting portion 63 and the upright connecting portion 64 arranged in parallel at different distances while facing different directions. , Is equipped.

Of the inner side wall 61b (62b) and the outer wall 61c (62c) forming the concave groove 61 (62) of the inverted connecting portion 63 (upright connecting portion 64), the outer wall 61c (the outer wall 61c) located at a position away from the connecting portion 65 ( The height of 62c) is lower than the height of the inner side wall 61b (62b) located closer to the joint portion 65.

In the block 60, the groove widths 61w and 62w of the concave grooves 61 and 62 of the inverted connecting portion 63 and the upright connecting portion 64 continuously increase toward the inner bottom surfaces 61d and 62d of the concave grooves 61 and 62, respectively. The thicknesses 61t and 62t of the outer walls 61c and 62c of the inverted connecting portion 63 and the upright connecting portion 64 increase toward the ridges 61e and 62e of the outer walls 61c and 62c, respectively. Further, the minimum groove width of the concave grooves 61 and 62 is smaller than the maximum thickness of the outer walls 61c and 62c.

Therefore, as shown in FIGS. 22 and 23, blocks 60x and 60y having the same shape as the block 60 can be connected. Specifically, the outer wall 61c of the inverted connecting portion 63 of the block 60y is located near one end of the concave groove 62 and the outer wall 62c of the upright connecting portion 64 of the block 60x placed on the construction target surface G4. Further, when the vicinity of one end of the concave groove 61 is brought close and the block 60y is moved along the longitudinal direction of the concave groove 61, 62, the blocks 60x, 60y are connected as shown in FIG. 23.

As described above, since the minimum groove width of the concave grooves 61 and 62 is smaller than the maximum thickness of the outer walls 61c and 62c, the blocks 60x and 60y connected as shown in FIG. When a force that causes displacement is applied, it is possible to prevent the blocks 60x and 60y from separating. Therefore, it is possible to construct a connected structure that does not easily collapse when the river is flooded or flooded.

Next, the block 70, which is another embodiment, will be described with reference to FIG. 24. In the block 70 shown in FIG. 24, the outer surface 71a and the inner surface 71b of the outer wall 71c of the concave groove 71 provided in the inverted connecting portion 73 have a saw blade shape in which irregularities are repeated along the longitudinal direction of the concave groove 71. It is a face. Further, in the block 70, the inner side surface 72d of the outer wall 72c of the concave groove 72 of the upright connecting portion 74 and the inner side surface 72f of the inner side wall 72b have a saw blade shape in which irregularities are repeated along the longitudinal direction of the concave groove 72. It is a face.

Therefore, when a plurality of blocks 70 are arranged in combination as shown in FIG. 6 to form a connecting structure, the saw blade-shaped surfaces facing each other can be meshed with each other, so that the blocks 70 can be positioned with each other. Not only is it easier, but the connecting force is also improved, which is effective in improving the strength of the completed connecting structure.

The blocks 10, 20, 30, 40, 50, 60, and 70 described with reference to FIGS. 1 to 24 exemplify the blocks according to the present invention, and the blocks according to the present invention are the blocks 10 described above. , 20, 30, 40, 50, 60, 70. Further, the block connection structures 100, 110, and 120 described with reference to FIGS. 8, 9, and 17 also exemplify the connection structures using the blocks according to the present invention, and the blocks according to the present invention are used. The connected structure that was used is not limited to the above-mentioned connected structure.

The block according to the present invention can be widely used in the field of civil engineering and construction as a construction material for a bank protection structure constructed to prevent erosion of river embankments and coasts.

1,2,3,4,5,6,7 Arc-shaped array 10,10x, 10y, 10z, 20,30,40,40x,40y, 50,60,60x, 60y, 70 blocks 11,12,31, 32, 41, 42, 51, 52, 61, 62, 71, 72 Concave groove 13, 33, 43, 53, 63, 73 Connection part (inverted connection part)
14,34,44,54,64,74 connecting part (upright connecting part)
11a, 12a, 31a, 32a, 41a, 42a, 61a, 62a Opening portions 11b, 12b, 31b, 32b, 41b, 42b, 61b, 62b, 72b Inner side walls 11c, 12c, 31c, 32c, 41c, 42c, 61c, 62c, 71c, 72c Outer side wall 11d, 12d, 61d, 62d Inner bottom surface 11e, 11f, 12e, 12f, 31e, 31f, 32e, 61e, 62e Ridge 11g, 12g, 51a, 51b, 52a, 52b, 71b, 72d, 72f Inner surface 11h, 11H, 12h, 12H Height 11r, 12r Convex curved surface 11s, 12s Concave curved surface 11t, 12t Maximum thickness 41t, 42t, 61t, 62t Thickness 11w, 12w Minimum width 12j, 12k Chamfered part 12m , 71a Outer side surface 13a, 14a, 34a, 63a, 64a Outer bottom surface 13L, 14L Length 15, 35, 45, 65 Joint part 15a Outer surface 33x, 34x Standing surface 36, 37 Protrusions 41w, 42w, 51w, 52w, 61w , 62w Groove width 100,110,120 Connecting structure G, G1, G2, G3, G4 Construction target surface P Mutual connection direction Q Rotating direction R1, R2, R3, R4, R5 Radius of curvature V Curved part

Claims (8)

Two connecting portions (upright connecting portion and an upright connecting portion) which have a J-shaped concave groove in a cross-sectional shape and are arranged in parallel at a distance in a state where the opening portions of the concave groove face different directions by 180 degrees from each other. A block including an inverted connecting portion) and a connecting portion for connecting the connecting portions between the two connecting portions (upright connecting portion and inverted connecting portion) .
Of the inner wall surface and the outer wall forming the concave groove, at least a part of the outer wall located at a position away from the joint portion can be fitted into the concave groove of another block having the same shape as the block. the maximum thickness of the outer wall Ri Ah at less than the minimum width of the groove,
At least a part of the outer wall of the inverted connection portion located away from the joint portion is fitted into a concave groove of an upright connection portion of another block having the same shape as the block and installed on the construction target surface. When the outer wall of the upright connecting portion of the other block is fitted into the concave groove of the inverted connecting portion of the block to connect the block to the other block, the concave groove and the outer wall become A gap is formed between the blocks, and the connecting posture of the block with respect to the other block slides relative to the longitudinal direction of the concave groove and the interconnection direction along the construction target surface. direction, the direction of rotation on the construction target surface, changeable der to Ru blocks. The block according to claim 1, wherein the height of the outer wall is lower than the height of the inner wall surface located near the joint. With at least a part of the outer bottom surface of one of the connecting portions
The block according to claim 1 or 2, wherein at least a part of the ridge portion of the inner wall surface of the other connecting portion is located on the same virtual plane. The block according to claim 3, wherein at least a part of the outer surface of the joint is located on the virtual plane. One of the outer bottom surface of the connecting portion, a plurality of locations of the flange portion of the other inner wall of the connecting portion, the block according to any one of claims 1 to 4 provided with a protrusion, respectively. A claim in which the concave groove of one of the connecting portions is curved in an arc shape forming a convex shape in a direction away from the connecting portion, and the concave groove of the other connecting portion is curved in an arc shape forming a convex shape in a direction approaching the connecting portion. The block according to any one of Items 1 to 5. 1. The block according to any one of ~ 6. A concave curved surface along the concave shape of the inner bottom surface is provided on at least a part of the inner bottom surface of the concave groove.
The block according to any one of claims 1 to 7 , wherein a convex curved surface along the convex shape of the protruding edge portion is provided on at least a part of the protruding edge portion of the outer wall.

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