JP6762569B2 - Block set and block connection structure - 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 set and block connection structure.

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. 16 and a plurality of construction-shaped blocks 190 as shown in FIG. ing.

As shown in FIG. 16, 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. 17, the block 190 is a concrete material having a shape in a plan view, and the horizontal line portion 191 of one of the two horizontal line portions 191 and 192 constituting the work character is It has a quadrangular prism shape, and is provided with protrusions 193 for rotation bearings having a size that can be fitted into the grooves 182 of the block 180 shown in FIG. 16 on the lower surfaces of the left and right ends of the other horizontal line portion 192.

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 is formed so as to cover the construction target surface.

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. 16 and the block 190 shown in FIG. 17 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.

The reason for this will be described below with reference to FIG. When the block 180 shown in FIG. 16 and the block 190 shown in FIG. 17 are used to form a connecting structure on the embankment of a part where the river bends sharply, for example, as shown in FIG. 18, a plurality of blocks 180 And the block 190 need to be combined 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, a plurality of blocks 180c, 180d, 180e are sequentially arranged along the curved surface of the embankment to form arcuate arrays C, D, and E in the same manner as described above, 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 the drawing (upper FIG. 18).

However, as shown in FIG. 18, 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. 18 and 19, 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. 18 and 19 can be drawn on the drawing, 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. The purpose is to provide a block set and a block connection structure.

The block set according to the present invention is
In a connecting structure formed by arranging a plurality of blocks in a staggered manner in the vertical and horizontal directions on a construction target surface and connecting adjacent portions to each other.
A block set including a first block and a second block capable of forming a part of the connecting structure in combination with the block.
The first block and the second block can be connected to the block, respectively, and the first block and the second block can be connected to each other.
The connection state of the first block and the second block is in a direction of relatively sliding along the construction target surface in a direction intersecting the interconnection direction and a direction of rotation on the construction target surface. It is characterized by being changeable.

In the block set,
When the first block is placed on the surface to be constructed, the shape in a plan view is shaped like a letter.
One of the two horizontal line portions constituting the construction character is provided with connecting protrusions protruding in the extension direction of the horizontal line portion at both ends of the horizontal line portion while being separated from the construction target surface.
The other horizontal line portion is provided with an upright groove portion for connection that is parallel to the horizontal line portion and has the construction target surface side as the bottom.
When the second block is placed on the construction target surface, the plan view shape is T-shaped.
A connecting groove having a longitudinal direction across the vertical line portion is provided on the upper surface side of the vertical line portion constituting the T-shape.
An inverted groove for connection is provided on the lower surface side of the horizontal line portion constituting the T-shape, which is parallel to the horizontal line portion and has the upper surface side as the bottom.
Of the inner side wall and the outer wall forming the connecting inverted groove portion, at least a part of the lower edge portion of the outer wall on the side away from the vertical line portion is fitted into the connecting upright groove portion of the first block. It is desirable to be possible.

The word "upper" constituting the "upper surface side" means the direction of antigravity, and the word "lower" constituting the "lower surface side" and "lower edge portion" means the direction of gravity (hereinafter, the same applies). ).

In the block set, of the inner side wall and the outer wall forming the upright groove portion for connection of the first block, the upper edge portion of the outer wall on the side away from the vertical line portion constituting the kanji is It is desirable that the position is closer to the construction target surface than the upper edge of the inner side wall.

In the block set, at least a part of the bottom portion of the connecting upright groove portion and the outer wall of the first block may be provided with a flat surface portion parallel to the longitudinal direction of the connecting upright groove portion.

In the block set, the bottom surface of the connecting upright groove portion of the first block is provided with a concave curved surface portion parallel to the longitudinal direction of the connecting upright groove portion.
The upper edge portion of the outer wall may be provided with a convex curved surface portion parallel to the longitudinal direction of the outer wall.

In the block set, the groove width of the connecting erect groove portion of the first block may be widened from the central portion in the longitudinal direction of the connecting erect groove portion toward both ends.

In the block set, at least one of the inner surface and the outer surface of the outer wall of the first block is provided with a wavy surface or a saw blade-like surface that repeats unevenness along the longitudinal direction of the erect groove portion for connection. Can be.

In the block set, the lower edge portion of the outer wall of the connecting inverted groove portion of the second block can be located above the construction target surface.

In the block set, at least a part of the bottom portion of the connecting inverted groove portion and the outer wall of the second block may be provided with a flat surface portion parallel to the longitudinal direction of the connecting inverted groove portion.

In the block set, the bottom surface of the connecting inverted groove portion of the second block is provided with a concave curved surface portion parallel to the longitudinal direction of the connecting inverted groove portion.
The lower edge portion of the outer wall may be provided with a convex curved surface portion parallel to the longitudinal direction of the outer wall.

In the block set, the groove width of the connecting inverted groove portion of the second block may be widened from the central portion in the longitudinal direction of the connecting inverted groove portion toward both ends.

In the block set, on at least one of the inner surface of the inner wall surface and the inner surface of the outer wall of the second block, a wavy surface or a saw blade-like surface that repeats unevenness along the longitudinal direction of the connecting inverted groove portion is provided. Can be prepared.

Next, the block connection structure according to the present invention is
A block connection structure including the first block and the second block constituting any of the block sets described above.
A part of the end side of the outer wall forming the connecting inverted groove portion of the second block is fitted into the connecting upright groove portion of the first block.
Of the inner side wall and the outer wall forming the connecting upright groove portion of the first block in the connecting inverted groove portion of the second block, the outer wall on the side away from the vertical line portion constituting the kanji. It is characterized by having a portion in which a part of the end side is fitted.

INDUSTRIAL APPLICABILITY The present invention provides a block set and a block connection structure capable of easily constructing a high-strength revetment connection structure in a curved region having a relatively small radius of curvature such as a meandering river embankment or a curved coast. can do.

It is a perspective view which shows the state which the 1st block constituting the block set which is an embodiment of this invention is seen from obliquely above. It is a perspective view which shows the state which the 1st block shown in FIG. 1 is seen from obliquely below. It is a perspective view which shows the state which the 2nd block constituting the block set which is an embodiment of this invention is seen from obliquely above. FIG. 3 is a perspective view showing a state in which the second block shown in FIG. 3 is viewed from diagonally below. It is a perspective view which shows the connection process of a 1st block and a 2nd block. It is a top view which shows the block connection structure which includes the 1st block and the 2nd block. It is a side view of the block connection structure shown in FIG. It is a top view which shows the connection structure formed by connecting the 1st block, the 2nd block and the conventional block. It is a partially enlarged view of FIG. It is a side view which shows the connection process of the 1st block and the 2nd block in the block set which is another embodiment. It is a side view which shows the block connection structure including the 1st block and the 2nd block shown in FIG. It is a top view which shows the 1st block which constitutes the block set which is the other embodiment of this invention. It is a top view which shows the 2nd block which constitutes the block set which is the other embodiment of this invention. It is a top view which shows the 1st block which constitutes the block set which is the other embodiment of this invention. It is a top view which shows the 2nd block which constitutes the block set which is the other embodiment of this invention. It is a perspective view which shows the conventional T type 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.

Hereinafter, blocks 10, 30, 50, 70 and blocks 20, 40, 60, 80, which are embodiments of the present invention, will be described with reference to FIGS. 1 to 15. As will be described later, the blocks 10, 30, 50, and 70 are embodiments of the first block having a plan-view shape, and the blocks 20, 40, 60, and 80 have a T-shape in a plan view. It is an embodiment of the second block.

First, block 10, which is the first block, will be described with reference to FIGS. 1 and 2. As shown in FIGS. 1 and 2, the block 10 has a shape in a plan view when placed on the construction target surface G (see FIG. 5). Connecting protrusions protruding in the extension direction of the horizontal line portion 11 at both ends of the portion corresponding to the horizontal line portion 11 of the two horizontal line portions 11 and 12 constituting the construction character while being separated from the construction target surface G. It includes parts 13 and 13. The other horizontal line portion 12 is provided with an upright groove portion 14 for connection that is parallel to the horizontal line portion 12 and has a bottom portion 14a on the construction target surface G side. The vertical line portion 17 connecting the two horizontal line portions 11 and 12 constituting the work character has a prismatic shape, and the lower surfaces of the horizontal line portions 11 and 12 and the vertical line portion 17 (the portion in contact with the construction target surface G) are It is in the same plane.

Of the pair of inner side walls 15 and outer wall 16 that form the upright groove portion 14 for connection, the upper edge portion 16a of the outer wall 16 on the side away from the vertical line portion 17 that constitutes the kanji is the other inner side wall 15. It is located on the lower side (G side of the construction target surface) from the upper edge portion 15a. In the block 10, the bottom portion 14a of the connecting upright groove portion 14 and the upper edge portion 16a of the outer wall 16 are flat portions parallel to the longitudinal direction of the connecting upright groove portion 14. Further, the upper surface of the vertical line portion 17 is located below the upper edge portion 15a of the inner side wall 15.

The wall thickness of the inner side wall 15 is continuously reduced toward the upper edge portion 15a, and the groove width of the connecting upright groove portion 14 is continuously widened from the bottom portion 14a toward the upper side (opening side). .. The cross-sectional shape of the inner side wall 15 and the outer wall 16 including the bottom portion 14a of the upright groove portion 14 for connection has a hook shape as a whole. In FIG. 2, 14b indicates the minimum groove width of the connecting upright groove portion 14, and 16b indicates the maximum wall thickness of the outer wall 16.

Further, in the block 10, the lower surface portions of the connecting protrusions 13 and 13 have a semi-cylindrical shape with an outer diameter that can be accommodated in the groove portion 182 of the T-shaped block 180 shown in FIG. The block 10 according to this embodiment is made of concrete, but the material is not limited.

Next, the block 20 will be described with reference to FIGS. 3 and 4. The block 20 shown in FIGS. 3 and 4 is a second block that is connected to the block 10 that is the first block shown in FIGS. 1 and 2 to form a block set, and more specifically, one of the connected structures described later. It is a block for forming a part.

The block 20 has a T-shaped plan view when placed on the construction target surface G (see FIGS. 6 and 7), and the vertical line portion 21 is provided on the upper surface side of the vertical line portion 21 constituting the T-shape. A connecting groove portion 22 having a longitudinal direction as a transverse direction and a bottom portion 22a on the construction target surface G side is provided, and the lower surface side of the horizontal line portion 23 constituting the T-shape is parallel to the horizontal line portion 23 and the upper surface side is the bottom portion 24a. An inverted groove portion 24 for connecting is provided. The upper surface of the vertical line portion 21 forming the T-shape is located below the upper surface of the horizontal line portion 23.

As shown in FIG. 4, of the pair of inner side walls 25 and outer wall 26 forming the connecting inverted groove portion 24, the lower edge portion 26a of the outer wall 26 on the side away from the vertical line portion 21 is the construction target surface G. It is located above (see FIG. 5). The wall thickness of the inner side wall 25 is continuously reduced toward the lower edge portion 25a, and the groove width of the connecting inverted groove portion 24 is continuously widened from the bottom portion 24a toward the lower side (opening side). The cross-sectional shape of the inner side wall 25 and the outer wall 26 including the bottom portion 24a of the connecting inverted groove portion 24 has an inverted hook shape as a whole. In FIG. 3, 24b indicates the minimum groove width of the connecting inverted groove portion 24, and 26b indicates the maximum wall thickness of the outer wall 26.

As shown in FIGS. 1 to 3, the minimum groove width 14b of the connecting upright groove portion 14 of the block 10 is larger than the maximum wall thickness 26b of the outer wall 26 of the block 20, and the connecting inverted groove portion 24 of the block 20 The minimum groove width 24b is larger than the maximum wall thickness 16b of the outer wall 16 of the block 10.

Therefore, the portion from the lower edge portion 26a to the bottom portion 24a of the outer wall 26 of the connecting inverted groove portion 24 can be fitted into the connecting upright groove portion 14 of the block 10 shown in FIGS. 1 and 2, and the block 10 can be fitted. The portion from the upper edge portion 16a to the bottom portion 14a of the outer wall 16 of the connecting upright groove portion 14 can be fitted into the connecting inverted groove portion 24.

In the block 20, the bottom portion 24a of the connecting inverted groove portion 24 and the lower edge portion 26a of the outer wall 26 are flat portions parallel to the longitudinal direction of the connecting inverted groove portion 24. Further, in the block 20, the cross-sectional shape of the connecting groove portion 22 is a semicircular shape, and the protrusion 184 of the conventional T-shaped block 180 shown in FIG. 16 can be accommodated in the connecting groove portion 22. The block 20 according to this embodiment is made of concrete, but the material is not limited.

Next, a block connecting structure formed by using the blocks 10 and 20 will be described with reference to FIGS. 1, 3 and 5 to 7. As shown in FIG. 5, a part of the outer wall 26 of the two blocks 20 is fitted into the connecting erect groove portion 14 of the block 10 installed on the construction target surface G, and the block is formed. A part of the outer wall 16 of the 10 on the end side is fitted into the connecting inverted groove 24 of the two blocks 20 respectively. As a result, a block connection structure including a portion in which the block 10 and the block 20 are connected in the state shown in FIGS. 6 and 7 is formed.

As shown in FIG. 7, the minimum groove width 14b of the connecting upright groove portion 14 of the block 10 is larger than the maximum wall thickness 26b of the outer wall 26 of the block 20, and the minimum groove width of the connecting inverted groove portion 24 of the block 20. Since 24b is larger than the maximum wall thickness 16b of the outer wall 16 of the block 10, it is between the upright groove portion 14 for connection of the block 10 and the outer wall 26 of the block 20 and the inverted groove portion 24 for connection of the block 20. A gap having a spread in the longitudinal direction of each of the vertical line portions 17 and 21 is formed between the block 10 and the outer wall 16.

Therefore, as shown in FIG. 6, the connected state of the block 10 and the block 20 is a direction in which the block 10 and the block 20 slide relative to each other along the construction target surface G in the direction intersecting the mutual connection direction P (arrow line L direction). It can be changed to the direction Q of rotation on the construction target surface G. Therefore, the horizontal line portion 23 of the block 20 can be connected so as to be oblique to the longitudinal direction of the horizontal line portion 12 of the block 10. Therefore, it is possible to connect the plurality of blocks 10 arranged so that the longitudinal direction of the horizontal line portion 12 forms an arc shape, so that the horizontal line portions 23 of the plurality of blocks 20 form an arc shape. Further, as shown in FIG. 6, the two blocks 20 are slid in the longitudinal direction (arrow line L direction) of the respective horizontal line portions 23 with respect to the horizontal line portion 12 of the block 10 to adjust the connection positions with each other. be able to.

Therefore, as shown in FIG. 8, by connecting the plurality of blocks 180 and 190 and the plurality of blocks 10 and 20 in combination, a connecting structure 100 having a fan shape in a plan view is constructed. be able to.

When constructing the connecting structure 100, first, a plurality of blocks 180 are arranged along the curved surface of the embankment along the flow direction of the river to form an arcuate array U. Next, the plurality of blocks 180 are connected to the block 180 while being arranged in an arc shape along the arc-shaped array U of the block 180 to form the arc-shaped array V.

In the embodiment shown in FIG. 8, it has been found at the design stage that the arcuate array X located next to the arcuate array V has a small radius of curvature and cannot be handled by the conventional block 180. Therefore, a plurality of blocks 10 are arranged in an arc shape along the arcuate array V of the block 180 and connected to the block 180 to form an arcuate array W.

Next, in the manner shown in FIG. 6, a plurality of blocks 20 are arranged in an arc shape along the arcuate array W of the block 10 and connected to the block 10 to form an arcuate array X. At this time, since the number of blocks 20 arranged is not limited, the number of blocks 20 corresponding to the length of the arcuate arrangement W of the blocks 10 in the arc direction can be arranged at appropriate intervals.

After that, the arcuate array X of the plurality of blocks 20 is connected to the block 20 while arranging the plurality of blocks 180 in an arc shape to form the arcuate array Y of the plurality of blocks 180. Finally, by arranging a plurality of blocks 190 along the arcuate array Y with respect to the arcuate array Y to form the arcuate array Z, a connecting structure 100 having the block connecting structure shown in FIG. 6 is formed. can do.

As shown in FIG. 8, in the connected structure 100, the radius of curvature of the arcuate arrays U to Z becomes smaller in this order, and the length of each row of the arcuate arrays U to Z in the arc direction is the arcuate array U. It becomes shorter toward the arcuate array Z. Therefore, in the arcuate arrangements U to Z, the arrangement intervals of the blocks 180 adjacent to each other in the arcuate direction need to be shortened in the order of the arcuate arrangements U to Z.

Therefore, as shown in FIG. 9, by providing the arcuate arrangement W of the plurality of blocks 10 and the arcuate arrangement X of the plurality of blocks 20 in the portion that cannot be handled by the arcuate arrangement of the conventional blocks 180, the blocks can be connected to each other. It is possible to avoid the occurrence of overlapping R (see FIG. 19), and it is possible to easily construct a high-strength revetment connecting structure 100 in a curved region having a relatively small radius of curvature.

Next, the work mold blocks 30, 50, 70 and the T type blocks 40, 60, 80, which are other embodiments of the present invention, will be described with reference to FIGS. 10 to 15. In addition, in the part constituting the block 30, 50, 70, 40, 60, 80 shown in FIGS. The same reference numerals as those of the above-mentioned reference numerals are given and the description thereof will be omitted.

In the block 30 and the block 40 shown in FIG. 10, the upper edge portion 36a of the outer wall 36 of the block 30 and the lower edge portion 46a of the outer wall 46 of the block 40 each have a semi-cylindrical shape. Specifically, the upper edge portion 36a of the outer wall 36 of the block 30 has a semi-cylindrical shape (having a convex curved surface portion) having an axial center parallel to the longitudinal direction of the connecting erect groove portion 14, and the block 40 has a convex curved surface portion. The lower edge portion 46a of the outer side wall 46 has a semi-cylindrical shape having an axial center parallel to the longitudinal direction of the connecting inverted groove portion 24 (having a convex curved surface portion).

That is, the upper edge portion 36a of the outer wall 36 of the block 30 has a convex curved surface portion parallel to the longitudinal direction of the connecting upright groove portion 14, and the lower edge portion 46a of the outer wall 46 of the block 40 is the connecting inverted groove portion 24. It has a convex curved surface portion parallel to the longitudinal direction of. Further, the bottom portion 14b of the connecting upright groove portion 14 of the block 30 has a concave curved surface portion parallel to the longitudinal direction of the connecting upright groove portion 14, and the bottom portion 24b of the connecting upright groove portion 24 of the block 40 is a connecting inverted groove portion. It has a concave curved surface portion parallel to the longitudinal direction of 24.

Therefore, as shown in FIG. 11, the block 30 and the block 40 can change their connecting postures in a hinge shape around the horizontal line portions 12 and 23, respectively. Therefore, the block 30 and the block 40 can be reliably connected even when the inflection point G1 is in the middle of the construction target surface G.

In the block 50 shown in FIG. 12, the groove width 54w of the connecting upright groove portion 54 provided in one of the horizontal line portions 52 of the kanji is from the central portion in the longitudinal direction of the connecting upright groove portion 54 toward both ends. Each is continuously widened. Further, the inner side wall 55 and the inner surfaces 55a and 56a of the outer wall 56 forming the upright groove portion 54 for connection form a smooth convex curved surface having an arcuate shape in a plan view.

In the block 60 shown in FIG. 13, the groove width 64w of the connecting inverted groove portion 64 provided in the T-shaped horizontal line portion 63 is continuous from the central portion in the longitudinal direction of the connecting inverted groove portion 64 toward both ends. It is widening. Further, the inner side walls 65 forming the connecting inverted groove portion 64 and the inner surfaces 65a and 66a of the outer wall 66 have smooth convex curved surfaces having an arcuate shape in a plan view.

By making the groove width 54w of the connecting upright groove 54 of the block 50 and the groove width 64w of the connecting inverted groove 64 of the block 60 into the above-mentioned shapes, the block 50 and the block 60 are arranged as shown in FIG. When forming a connected structure, the function of dealing with an arcuate array having a small radius of curvature is improved.

In the block 70 shown in FIG. 14, the inner surface 76a and the outer surface 76b of the outer wall 76 of the connecting erect groove portion 74 provided in one horizontal line portion 72 of the kanji are along the longitudinal direction of the connecting erect groove portion 74. It has a saw-toothed surface that repeats unevenness.

In the block 80 shown in FIG. 15, the inner surface 85a of the inner side wall 85 and the inner surface 86a of the outer wall 86 facing each other across the connecting inverted groove 84 provided in the T-shaped horizontal line portion 73 are the connecting inverted groove 84. It is a saw blade-like surface that repeats irregularities along the longitudinal direction.

The block 70 and the block 80 are formed by forming the inner surface 76a and the outer surface 76b of the outer wall 76 of the block 70 and the inner surface 85a of the inner side wall 85 of the block 80 and the inner surface 86a of the outer wall 86 as described above, respectively. In the case of arranging and connecting as shown in the above, if the facing saw blade-shaped surfaces are meshed with each other, not only the positioning of the block 70 and the block 80 becomes easy, but also the connecting force is improved.

The construction type blocks 10, 30, 50, 70 and the T type blocks 20, 40, 60, 80 described with reference to FIGS. 1 to 15 are the first blocks constituting the block set according to the present invention. The second block is exemplified, and the first block and the second block constituting the block set according to the present invention are not limited to the above-mentioned blocks 10, 30, 50, 70 and blocks 20, 40, 60, 80. Further, the block connection structure described with reference to FIGS. 5 to 9 also shows an example of the block connection structure according to the present invention, and the block connection structure according to the present invention is not limited to the above-mentioned block connection structure.

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

10, 30, 50, 70 Blocks 11, 12, 23, 52, 63, 72, 83 Horizontal line part 13 Connecting protrusions 14, 54, 74 Connecting erect groove parts 14a, 14b, 22a, 24a, 24b Bottom 14b, 24b Minimum groove width 15, 25, 55, 65, 75 Inner side wall 15a, 16a, 36a Upper edge 16, 26, 36, 46, 56, 66, 76 Outer side wall 16b, 26b Maximum wall thickness 17, 21 Vertical line 20, 40, 60, 80 Block 22 Connecting groove 24, 64, 84 Connecting inverted groove 25a, 26a, 46a Lower edge 54w, 64w Groove width 55a, 56a, 76a, 85a, 86a Inner surface 76b Outer surface 100 Connecting structure 180, 190 Conventional block 182 Groove G Construction target surface G1 Curved U, V, W, X, Y, Z Arc-shaped arrangement

Claims (13)

In a connecting structure formed by arranging a plurality of blocks in a staggered manner in the vertical and horizontal directions on a construction target surface and connecting adjacent portions to each other.
A block set including a first block and a second block capable of forming a part of the connecting structure in combination with the block.
The first block and the second block can be connected to the block, respectively, and the first block and the second block can be connected to each other.
The connection state of the first block and the second block is in a direction of relatively sliding along the construction target surface in a direction intersecting the interconnection direction and a direction of rotation on the construction target surface. A mutable block set. When the first block is placed on the surface to be constructed, the shape in a plan view is shaped like a letter.
One of the two horizontal line portions constituting the construction character is provided with connecting protrusions protruding in the extension direction of the horizontal line portion at both ends of the horizontal line portion while being separated from the construction target surface.
The other horizontal line portion is provided with an upright groove portion for connection that is parallel to the horizontal line portion and has the construction target surface side as the bottom.
When the second block is placed on the construction target surface, the plan view shape is T-shaped.
A connecting groove having a longitudinal direction across the vertical line portion is provided on the upper surface side of the vertical line portion constituting the T-shape.
An inverted groove for connection is provided on the lower surface side of the horizontal line portion constituting the T-shape, which is parallel to the horizontal line portion and has the upper surface side as the bottom.
Of the inner side wall and outer wall forming the connecting inverted groove portion, at least a part of the lower edge portion of the outer wall on the side away from the vertical line portion is fitted into the connecting upright groove portion of the first block. The block set according to claim 1, which is possible. Of the inner wall surface and the outer wall surface forming the connecting erect groove portion of the first block, the upper edge portion of the outer wall surface on the side away from the vertical line portion forming the kanji is the other inner wall surface. The block set according to claim 2, which is located closer to the construction target surface than the upper edge portion. The block set according to claim 3, wherein the bottom portion of the erect groove portion for connection and at least a part of the outer wall thereof are provided with a flat surface portion parallel to the longitudinal direction of the erect groove portion for connection. The bottom surface of the connecting upright groove portion is provided with a concave curved surface portion parallel to the longitudinal direction of the connecting upright groove portion.
The block set according to claim 3 or 4, wherein the upper edge portion of the outer wall is provided with a convex curved surface portion parallel to the longitudinal direction of the outer wall. The block set according to any one of claims 2 to 5, wherein the groove width of the connecting upright groove portion is widened from the central portion in the longitudinal direction of the connecting upright groove portion toward both ends. The block set according to claim 2, wherein at least one of the inner surface and the outer surface of the outer wall is provided with a wavy surface or a saw blade-like surface that repeats unevenness along the longitudinal direction of the erect groove portion for connection. The block set according to claim 2, wherein the lower edge portion of the outer wall of the inverted groove portion for connection of the second block is located above the construction target surface. The block set according to claim 7 or 8, wherein the bottom portion of the connecting inverted groove portion and at least a part of the outer wall thereof are provided with a flat surface portion parallel to the longitudinal direction of the connecting inverted groove portion. The bottom surface of the connecting inverted groove portion is provided with a concave curved surface portion parallel to the longitudinal direction of the connecting inverted groove portion.
The block set according to claim 9, wherein the lower edge portion of the outer wall includes a convex curved surface portion parallel to the longitudinal direction of the outer wall. The block set according to any one of claims 7 to 10, wherein the groove width of the connecting inverted groove portion is widened from the central portion in the longitudinal direction of the connecting inverted groove portion toward both ends. Any one of claims 7 to 11 provided with a wavy surface or a saw blade-like surface that repeats unevenness along the longitudinal direction of the connecting inverted groove portion on at least one of the inner surface of the inner side wall and the inner surface of the outer wall. The block set described in the section. A block connection structure including the first block and the second block constituting the block set according to any one of claims 1 to 12.
A part of the end side of the outer wall forming the connecting inverted groove portion of the second block is fitted into the connecting upright groove portion of the first block.
Of the inner side wall and the outer wall forming the connecting upright groove portion of the first block in the connecting inverted groove portion of the second block, the outer wall on the side away from the vertical line portion constituting the kanji. A block connection structure with a part where a part on the end side is fitted.

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