Construction method of a structure using concrete blocks and concrete blocks

Abstract

To provide a concrete block which is easy to align upper and lower concrete blocks and has excellent workability.SOLUTION: In a concrete block 1 having a plurality of protrusions 21L, 21, 21R, 22L, 22, 22R on a top surface 3 of a block body 2 and grooves 32L, 31, 32R on a bottom surface 4 of the block body 2 correspondingly to the protrusions 21L, 21, 21R, 22L, 22, 22R, the grooves 32L, 31, 32R are continuous between the opposing sides of the block body 2, a front side 5 and a rear side 6, and are open at the front side 5 and the rear side 6. Therefore, when the block bodies 2, 2 are lined up with the same orientation, grooves 32L, 31, 32R that are continuous with the bottom surfaces 4 of a plurality of block bodies 2, 2 can be formed, making it easier to align the upper and lower concrete blocks 1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to concrete blocks that are arranged side by side and / or stacked to form a structure. Construction method of a structure using concrete blocks It relates thereto.

Background Art

[0002] Conventionally, for slopes, sand dike works, revetment works, earth retaining works, bed protection works, root fixing works, drop works, etc., concrete blocks have been used by arranging them side by side and / or stacking them.

[0003] For example, in a covering block (for example, Patent Document 1) which is a concrete block, protrusions are provided on the upper surface side of the center of two of the four side surfaces of a rectangular block, and recesses that engage with these protrusions are provided on the other side surfaces. Also, by the vertical and horizontal meshing of these protrusions and recesses, adjacent blocks act as weights against the lifting of the blocks, and the concrete blocks arranged side by side can be integrated.

[0004] Also, in a concrete block for constructing a structure (for example, Patent Document 2), the basic unit is a three-dimensional object in which a frustum of a pyramid or a frustum of a cone is formed at the center of the upper surface of a rectangular parallelepiped-shaped main body, and an insertion hole having a size and shape into which the protrusion can be inserted with a clearance is engraved at the center of the bottom surface thereof. Two of these basic units are made into a two-piece concrete block in a three-dimensional object in which the protrusions face the same direction and the side surfaces of the same shape are brought into close contact with each other with the protrusions facing upward. Two of these two-piece concrete block bodies are arranged in parallel and brought into close contact with each other.

[0005] In the concrete block of Patent Document 2 above, for example, when four protrusions are provided, the concrete blocks can be stacked directly on top of each other, or the upper and lower concrete blocks can be shifted by half and stacked diagonally.

[0006] However, in the covering block of Patent Document 1, although adjacent blocks can be integrated by the engagement of protrusions and recesses, when the covering blocks are stacked vertically, there is a lack of stability.

[0007] On the other hand, in the concrete block of Patent Document 2 with four protrusions, it is stable in the stacked state by fitting the protrusions into the fitting holes. However, when stacking the upper and lower concrete blocks diagonally with a half shift on the front surface such as a slope surface, there is a problem that it cannot be stacked corresponding to the slope of the slope surface.

[0008] Furthermore, in the concrete block with four protrusions, when two lower concrete blocks are arranged side by side horizontally and an upper concrete block is placed on the center of these two lower concrete blocks, it is necessary to suspend the upper concrete block by aligning the fitting holes of the upper concrete block with the two protrusions on the right side of the left lower concrete block and the two protrusions on the left side of the right lower concrete block. If the left and right lower concrete blocks are not accurately aligned, there is a risk that the protrusions may not fit well into the fitting holes.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Patent Document 2

Disclosure of the Invention

Problems to be Solved by the Invention

[0010] Therefore, the present invention aims to solve the above problems and provides a concrete block with easy alignment work of the concrete block and excellent workability.

Means for Solving the Problems

[0011] The invention according to claim 1 is a concrete block having a plurality of protrusions provided on the top end surface of the block body, and a groove portion provided on the bottom surface of the block body corresponding to the protrusions, wherein the groove portion is formed between the opposing The front side and the rear side surfaces of the block body and is continuous, and The front side and the said rear is open on the side surface The block body has four side surfaces: the front side surface, the rear side surface, the left side surface, and the right side surface. A side protrusion is provided at the center in the left-right direction of the front side surface. Receiving grooves into which the side protrusions fit are provided at the center in the left-right direction of the rear side surface and at the center in the front-rear direction of the left and right side surfaces. On the front side surface, both left and right sides of the side protrusion are contact surfaces that contact the side surfaces of other block bodies. On the rear side surface, both left and right sides of the receiving groove are contact surfaces that contact the side surfaces of other block bodies. On the left and right side surfaces, both front and rear sides of the receiving groove are contact surfaces that contact the side surfaces of other block bodies. The block body has the same front-rear width, which is the distance between the contact surfaces of the front and rear side surfaces, and the same left-right width, which is the distance between the contact surfaces of the left and right side surfaces. On the front and rear sides of the top end surface, the left, central, and right protrusions arranged in the left-right direction are equally spaced in the left-right direction. These protrusions have the same shape. The distance between the contact surface of the front side surface and the three front protrusions, and the distance between the contact surface of the rear side surface and the three rear protrusions are the same. The distance between the contact surface of the left side surface and the left protrusion, and the distance between the contact surface of the right side surface and the right protrusion are half of the distance between the protrusions arranged side by side. Corresponding to the left, central, and right protrusions, left, central, and right groove portions are provided. By fitting the side protrusion of the rear block body into the receiving groove on the rear side surface of the front block body, the groove portions of the front and rear block bodies are aligned and communicate in a straight line in the front-rear direction. The block bodies are stacked vertically. With the protrusion of the lower block body engaged with the groove portion of the upper block body, the upper block body is movable in the length direction of the groove portion. By engaging the protrusion of the lower block body with the groove portion of the upper block body, the upper block body is positioned in the width direction of the groove portion with respect to the lower block body characterized by this.

[0012] The invention according to claim 2 is Characterized by stacking the concrete blocks according to claim 1 to form a structure

Advantages of the Invention

[0013] According to the configuration of claim 1, since the groove portion that is continuous between the side surfaces is open on the side surface, when the block bodies are arranged facing each other, continuous groove portions can be formed on the bottom surfaces of a plurality of block bodies, facilitating the alignment operation of the upper and lower concrete blocks.

[0014] According to the configuration of claim 1 , a plurality of block bodies can be integrated by the combination of the side protrusions and the receiving grooves into which the side protrusions are engaged.

[0015] According to the configuration of claim 1 , after stacking the upper block body on the lower block body and arranging a block body near the side of the upper block, and then moving this block body by pushing it toward the adjacent block body, the block bodies can be easily aligned with each other.

[0016] According to the configuration of claim 1 , the movement of the upper block body in the width direction of the groove portion can be restricted.

[0017] According to the configuration of claim 2, a structure can be formed by stacking concrete blocks

Brief Description of the Drawings

[0018]

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Mode for Carrying Out the Invention

[0019] A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Note that the embodiments described below do not limit the content of the present invention described in the claims. Also, not all of the configurations described below are essential requirements of the present invention.

Examples

[0020] Hereinafter, examples of the present invention will be described with reference to the accompanying drawings. FIGS. 1 to 9 show Example 1 of the present invention, and an example in which the concrete block 1 is used for a slope.

[0021] The block body 2 of the concrete block 1 has upper and lower top end faces 3 and a bottom face 4 that are substantially constant in thickness T (FIG. 5) and are arranged in parallel, and has four front, rear, left, and right side faces 5, 6, 7L, and 7R around it. As shown in FIG. 7, the front-rear width H1 between the front and rear side faces 5 and 6 and the left-right width H2 between the left and right side faces 7L and 7R are equal, forming a rectangular shape. In addition, chamfered corner side faces 8, 8, 8, 8 are formed at the four corners of the block body 2.

[0022] The concrete block 1 is provided with side protrusions 11 that protrude forward in the shape of a flat isosceles trapezoid at the center in the left - right direction of the front side surface 5 of the block body 2. At the center in the left - right direction of the rear side surface 6, a receiving groove 12 into which the side protrusions 11 are engaged is provided. This receiving groove 12 is recessed in the shape of a flat isosceles trapezoid. Also, at the center in the front - rear direction of the left and right side surfaces 7L, 7R, receiving grooves 12 into which the side protrusions 11 are engaged are provided. And a side protrusion 11 is provided on one of the opposing front and rear side surfaces 5, 6, which is the front side surface 5, and a receiving groove 12 is formed on the other, which is the rear side surface 6.

[0023] The side protrusion 11 is formed slightly smaller than the receiving groove 12. Also, the side protrusion 11 in the shape of a flat isosceles trapezoid has front end surfaces 11B parallel to the front side surface 5 at the tips of the inclined side surfaces 11A, 11A on both sides. The included angle between these inclined side surfaces 11A, 11A is 100 degrees or more and 130 degrees or less, preferably 120 degrees or less. Similarly, the receiving groove 12 in the shape of a flat isosceles trapezoid has groove bottom surfaces 12B parallel to the side surface at the base ends of the inclined side surfaces 12A, 12A on both sides. The included angle between these inclined side surfaces 12A, 12A exceeds 90 degrees and is 130 degrees or less, preferably 120 degrees or less, and is equal to the included angle of the inclined side surfaces 11A, 11A.

[0024] Also, on the front side surface 5, contact surfaces 13, 13 where both sides of the side protrusion 11 contact the side surfaces of other block bodies 2 are provided. On the front - left and front - right side surfaces 5, 6, 6, contact surfaces 13, 13 where both sides of the receiving groove 12 contact the side surfaces of other block bodies 2 are provided. Note that the corner side surface 8 is not included in the contact surface 13. Also, the front - rear width H1 is the distance between the contact surfaces 13, 13 of the front and rear side surfaces 5, 6, and the left - right width H2 is the distance between the contact surfaces 13, 13 of the left and right side surfaces 7L, 7R.

[0025] A through hole 15 is formed in the center of the block body 2. This through hole 15 has a substantially hexagonal shape and is a hanger attachment hole into which an attachment (not shown) of a hanger can be locked. Further, as shown in FIG. 6, the through hole 15 is formed so as to expand from the top end surface 3 toward the bottom surface 4. Incidentally, the attachment can be loosely inserted into the through hole 15 and can be connected by pressing against the inner peripheral surface of the through hole 15 by expanding the diameter from the loosely inserted state.

[0026] On the front and rear of the top end surface 3, three protrusions 21L, 21, 21R, 22L, 22, 22R arranged in the left - right direction are equally spaced. These protrusions 21L, 21, 21R, 22L, 22, 22R have the same shape and are rectangular in shape that is long in the front - rear direction in plan view. The front - rear - left - right rising surfaces 23, 23, 23, 23 are formed so as to slightly narrow the interval upward, and an upper surface portion 24 is provided at the upper ends of those front - rear - left - right rising surfaces 23, 23, 23, 23. This upper surface portion 24 is parallel to the top end surface 3. Also, the interval between the contact surface 13 of the front side surface 5 and the protrusions 21L, 21, 21R is the same as the interval between the contact surface 13 of the rear side surface 6 and the protrusions 22L, 22, 22R. Also, the interval between the contact surface 13 of the right side surface 7R and the protrusions 21R, 22R is the same as the interval between the contact surface 13 of the left side surface 7L and the protrusions 21L, 22L.

[0027] Also, the side protrusion 11 is located at the center of the contact surfaces 13, 13 of the left and right side surfaces 7L, 7R, and the receiving groove 12 is located at the center of the contact surfaces 13, 13 sandwiching the receiving groove 12.

[0028] The central protrusions 21, 22 are located in front of and behind the through hole 15 and are at positions equally distant from the center of the through hole 15. The left - right protrusions 21L, 21R, 22L, 22R are respectively arranged on the left and right of those central protrusions 21, 22. Incidentally, as shown in FIG. 3, the three front protrusions 21L, 21, 21R and the left - right rear protrusions 22L, 22, 22R are arranged side by side on the virtual line K in the front - rear direction. Also, the interval W between the protrusions 21, 22 arranged in the front - rear direction is set larger than the interval WY between the centers of the protrusions 21L, 21, 21R arranged in the left - right direction.

[0029] Also, the distance between the contact surface 13 of the front side surface 5 and the protrusions 21L, 21, 21R is the same as the distance between the contact surface 13 of the rear side surface 6 and the protrusions 22L, 22, 22R. Also, the distance between the contact surface 13 of the right side surface 7R and the protrusions 21R, 22R is the same as the distance between the contact surface 13 of the left side surface 7L and the protrusions 21L, 22R.

[0030] Also, as shown in FIG. 3, the distance Wy between the contact surface 13 of the right side surface 7R and the protrusions 21R, 22R and the distance Wy between the contact surface 13 of the left side surface 7L and the protrusions 21L, 22L are approximately half of the distance WY.

[0031] On the bottom surface 4, three groove portions 32L, 31, 32R in the front - rear direction that allow the three protrusions 21L, 21, 21R, 22L, 22, 22R arranged side - by - side left - and - right to move in the front - rear direction are arranged at equal intervals left - and - right. These three groove portions 32L, 31, 32R are formed corresponding to the protrusions 21L, 21, 21R, 22L, 22, 22R, and the groove portions 32L, 31, 32R are formed centering on the virtual line K. Also, these three groove portions 32L, 31, 32R are continuously formed between the front and rear side surfaces 5, 6 of the block body 2, and openings 33, 33 that open to the front and rear side surfaces 5, 6 are provided before and after the three groove portions 32L, 31, 32R (FIGS. 2 and 6). Note that the virtual line K is also the center line in the left - right direction of the groove portions 31, 32, 32. Note that the protrusions 21L, 21, 21R, 22L, 22, 22R are smaller than the groove portions 31, 32, 32, and by pushing the upper block body 2, the movement of the upper block body 2 with respect to the lower block body 2 is allowed.

[0032] Further, on the bottom surface 4, left and right grooves 51, 51 in the left - right direction are formed front - to - back so as to intersect the groove portions 32L, 31, 32R. In the figure, S is the center line of the left and right grooves 51, and this center line S is also the center in the front - to - back direction of the protrusion portions 21L, 21, 21R. Further, the groove portions 31, 32, 51 have a planar groove bottom portion 39T at a position higher than the bottom surface 4 with the bottom surface 4 being open, and the groove bottom portions 39T of the groove portions 32L, 31, 32R, 51 are located on the same plane. Further, on the left - right or front - back of the groove bottom portion 39T, side wall portions (to be described later) rising from the bottom surface 4 are provided.

[0033] As shown in FIG. 4, in the central groove portion 31, from the front side, there are left and right front side wall portions 34, 34 which are the side wall portions rising from the bottom surface 4, left and right central front side wall portions 35, 35 provided before and after the through - hole 15, left and right central rear side wall portions 36, 36, and left and right rear side wall portions 37, 37 provided at the rear portion. Compared with the front side wall portion 34, the others are formed shorter. Further, the central groove portion 31 intersects the previous left and right groove portion 51 between the front side wall portion 34 and the central front side wall portion 35, and intersects the subsequent left and right groove portion 51 between the central rear side wall portion 36 and the rear side wall portion 37.

[0034] On the left - right outer sides of the left and right groove portions 32L, 32R, front and rear side wall portions 41, 42 which are the side wall portions rising from the bottom surface 4 are provided. On the left - right inner sides of the left and right groove portions 32L, 32R, front, central, and rear side wall portions 43, 44, 45 which are the side wall portions rising from the bottom surface 4 are provided.

[0035] The front ends of the outer front side wall portion 41 and the inner front side wall portion 43 are at the same position, the outer front side wall portion 41 is longer in the front - to - back direction than the inner front side wall portion 43, and as shown in FIG. 7, the front sides of the outer front side wall portion 41 and the inner central side wall portion 44 partially overlap in the front - to - back direction at the overlapping portion 41J. Also, the rear ends of the outer rear side wall portion 42 and the inner rear side wall portion 45 which are at the same position, the outer rear side wall portion 42 is longer in the front - to - back direction than the inner rear side wall portion 45, and as shown in FIG. 7, the rear sides of the outer rear side wall portion 42 and the central side wall portion 44 partially overlap in the front - to - back direction at the overlapping portion 42J.

[0036] Also, the left and right sides of the front left and right groove portions 51 are blocked by the left and right outer side wall front portions 41, 41, and the left and right sides of the rear left and right groove portions 51 are blocked by the left and right outer side wall rear portions 42, 42.

[0037] On the other hand, notch portions 55, 55 are provided on the bottom surfaces 4, 4 of the left and right side surfaces 7L, 7R of the block body 2. As shown in FIGS. 4 and 5, etc., this notch portion 55 has an opening portion 56 between the side wall front portion 41 and the side wall rear portion 42, and this opening portion 56 communicates with the groove bottom portion 39T of the groove portions 32L, 32R.

[0038] Next, a construction method related to the construction of a retaining wall 61 as a structure using the concrete block 1 will be described. As shown in FIG. 8, the concrete block 1 is stacked obliquely on the front surface of the slope 62 in accordance with the inclination of the slope 62 to form a retaining wall 61.

[0039] The lower concrete block 1 is laid on the installation surface 63 at the lower part of the slope 62, and the concrete block 1 is laid from the slope 62 side with the side protrusion 11 facing forward. At the same time, the receiving groove 12 at the rear part of the front concrete block 1 is fitted to the side protrusion 11 of the rear (slope side) concrete block 1, and the front concrete block 1 is laid. A plurality of concrete blocks 1, 1 are arranged in a row in the front-rear direction. In this way, in the front and rear concrete blocks 1, 1, the groove portions 32L, 31, 32R of the bottom surface 4 are aligned and communicate in a straight line in the front-rear direction. Similarly, a plurality of concrete blocks 1, 1 are arranged in a row in the front-rear direction for the left and right adjacent ones.

[0040] Place the second-stage concrete block 1 on top of the first-stage concrete block 1 from the slope side. In this example, stack the three protrusions 22L, 22, 22R on the rear side of the lower concrete block 1 so that they fit into the groove portions 32L, 31, 32R of the upper concrete block 1. In the fitted state, after stacking, the upper surface portions 24 of the protrusions 22L, 22, 22R do not contact or press against the groove bottom portions 39T of the groove portions 32L, 31, 32R, and the upper bottom surface 4 is in surface contact with the lower top end surface 3. In the stacked state, by pushing the upper-stage concrete block 1 backward, it can slide backward, and the rear side surface 6 of the concrete block 1 can be aligned with the inclination of the slope 62.

[0041] Also, place the second-stage concrete block 1 on top of the first-stage concrete blocks 1, 1 in front of the second-stage concrete block 1 on the slope 62 side. In this case, after placing the previous concrete block 1 with a gap in front of the subsequent concrete block 1, push the previous concrete block 1 backward to move it, and the receiving groove 12 of the previous concrete block 1 can be fitted into the side protrusion 11 of the subsequent concrete block 1.

[0042] Thereby, unlike the conventional method, it is not necessary to butt the rear surface of the previous concrete block 1 against the front surface of the subsequent concrete block 1 at the same time as placing the previous concrete block 1. That is, when lifting and unloading the previous concrete block 1, the alignment work with the subsequent concrete block 1 becomes unnecessary, and the constructability in the block stacking work can be improved.

[0043] Also, in the lifting and unloading work of the concrete block 1, connect the attachment of the lifting tool to the through-hole 15, and the concrete block 1 can be lifted and lowered by a heavy machine. Further, in the same manner, stack the third-stage concrete block 1 on top of the upper-stage (second-stage) concrete block 1, and cover the front surface of the slope 62 with the concrete blocks 1 stacked in multiple stages in this way. Also, fill and bury the gap 64 between the concrete block 1 in front of the slope 62 and the slope 62 with a backfill material (not shown) or the like.

[0044] Thus, in this embodiment, corresponding to claim 1, b In the concrete block 1 in which a plurality of protrusions 21L, 21, 21R, 22L, 22, 22R are provided on the top surface 3 of the lock body 2 and groove portions 32L, 31, 32R corresponding to the protrusions 21L, 21, 21R, 22L, 22, 22R are provided on the bottom surface 4 of the block body 2, the groove portions 32L, 31, 32R are continuous between the opposing side surfaces 5 and rear side surface 6 of the block body 2 and are open at the front side surface 5 and the rear side surface 6 before and continuous between the side surface 5 and the rear side surface 6 and open at the front side surface 5 and the rear side surface 6 The block body 2 has four side surfaces, namely a front side surface 5, a rear side surface 6, a left side surface 7L, and a right side surface 7R. A side protrusion 11 is provided at the center in the left-right direction of the front side surface 5, and receiving grooves 12 into which the side protrusion 11 fits are provided at the center in the left-right direction of the rear side surface 6 and at the center in the front-rear direction of the left and right side surfaces 7L and 7R. On the front side surface 5, the left and right sides of the side protrusion 11 are abutting surfaces 13, 13 that abut against the side surfaces of other block bodies 2. On the rear side surface 6, the left and right sides of the receiving groove 12 are abutting surfaces 13, 13 that abut against the side surfaces of other block bodies 2. On the left and right side surfaces 7L and 7R, the front and rear sides of the receiving groove 12 are abutting surfaces 13, 13 that abut against the side surfaces of other block bodies 2. The block body 2 has the same front-rear width H1, which is the distance between the abutting surfaces 13, 13 of the front and rear side surfaces 5, 6, and the same left-right width H2, which is the distance between the abutting surfaces 13, 13 of the left and right side surfaces 7L, 7R. On the front and rear sides of the top end surface 3, left, central, and right protrusions 21L, 21, 21R, 22L, 22, 22R arranged in the left-right direction are equally spaced in the left-right direction. These protrusions 21L, 21, 21R, 22L, 22, 22R have the same shape. The distance Wy between the abutting surface 13 of the left side surface 7L and the left protrusions 21L, 22L, and the distance Wy between the abutting surface 13 of the right side surface 7R and the right protrusion 21R are each half of the distance WY between the protrusions 21L, 21, 21R, 22L, 22, 22R arranged in the left-right direction. Corresponding to the left, central, and right protrusions 21L, 21, 21R, 22L, 22, 22R, left, central, and right groove portions 32L, 31, 32R are provided. By fitting the side protrusion 11 of the rear block body 2 into the receiving groove 12 on the rear side surface 6 of the front block body 2, the groove portions 32L, 31, 32R of the front and rear block bodies 2, 2 are aligned and communicate in a straight line in the front-rear direction. When the block bodies 2 are stacked vertically and the protrusions 22L, 22, 22R of the lower block body 2 are engaged with the groove portions 32L, 31, 32R of the upper block body 2, the upper block body 2 can move in the length direction of the groove portions 32L, 31, 32R. By engaging the protrusions 21, 22, 22 of the lower block body 2 with the groove portions 32L, 31, 32R of the upper block body 2, the upper block body 2 is positioned in the width direction of the groove portions 31, 32, 32 with respect to the lower block body 2. Therefore, it is possible to provide a concrete block 1 that is easy to align and has excellent workability.

[0045] Also, in this embodiment as described above, corresponding to claim 2, the concrete blocks 1 can be stacked to form the retaining wall 61 as a structure.

[0046] Thus, in this embodiment , b In the concrete block 1 in which a plurality of protrusions 21L, 21, 21R, 22L, 22, 22R are provided on the top surface 3 of the lock body 2 and groove portions 32L, 31, 32R corresponding to the protrusions 21L, 21, 21R, 22L, 22, 22R are provided on the bottom surface 4 of the block body 2, since the groove portions 32L, 31, 32R are continuous between the front side surface 5 and the rear side surface 6 which are the opposing side surfaces of the block body 2 and are open at the front side surface 5 and the rear side surface 6, when the block bodies 2, 2 are arranged with their orientations aligned, groove portions 32L, 31, 32R continuous with each other can be formed on the bottom surfaces 4, 4 of the plurality of block bodies 2, 2, and the alignment operation of the upper and lower concrete blocks 1 becomes easy.

[0047] Thus, in this embodiment , co Since a side surface protrusion 11 is provided on the front side surface 5 which is one of the opposing side surfaces and a receiving groove 12 into which the side surface protrusion 11 engages is provided on the rear side surface 6 which is the other of the opposing side surfaces, by engaging the side surface protrusion 11 into the receiving groove 12, adjacent concrete blocks 1, 1 can be integrated.

[0048] Thus, in this embodiment , bThe lock body 2 has four side surfaces 5, 6, 7L, and 7R. A side protrusion 11 is provided on the front side surface 5, which is one of these four side surfaces 5, 6, 7L, and 7R. At the same time, receiving grooves 12 into which the side protrusion 11 engages are provided on the other three side surfaces 6, 7L, and 7R. Therefore, by the combination of the side protrusion 11 and the receiving groove 12 into which the side protrusion 11 engages, a plurality of block bodies 2, 2 can be integrated.

[0049] Thus, in this embodiment , b the lock bodies 2 are stacked vertically, and with the protrusions 22L, 22, 22R of the lower block body 2 engaged with the groove portions 32 L , 31, 32R of the upper block body 2, since the upper block body 2 is movable in the length direction of the groove portions 32 L , 31, 32R, after stacking the upper block body 2 on the lower block body 2 and arranging the block body 2 near the adjacent one, by moving it by pushing it toward the adjacent block body 2 side, the block bodies 2, 2 can be easily aligned with each other.

[0050] Thus, in this embodiment , Fig as shown in 9, by engaging the protrusions 21, 22, 22 of the lower block body 2 with the groove portions 32 L , 31, 32R of the upper block body 2, the upper block body 2 is positioned in the width direction with respect to the lower block body 2, so that the movement of the upper block body 2 in the width direction of the groove portion can be restricted. 32L, 31, 32 of R Since it is positioned, the movement of the upper block body 2 in the width direction of the groove portion can be restricted.

[0051] Hereinafter, as an effect of the embodiment, the side protrusion 11 having a planar isosceles trapezoid shape fits into the receiving groove 12 having a planar isosceles trapezoid shape that is slightly larger than this, and by the contact surfaces 13, 13 coming into contact with each other, the adjacent concrete blocks 1, 1 can be integrated in an aligned state.

[0052] The side protrusion 11 in the shape of a flat isosceles trapezoid has a front end surface 11B parallel to the front surface 5 at the tips of the inclined side surfaces 11A, 11A on both sides, and the included angle between these inclined side surfaces 11A, 11A is 100 degrees or more and 130 degrees or less, preferably 120 degrees or less. Therefore, there are no acute-angled corners, and the concrete blocks 1, 1 can be connected to each other by fitting the side protrusion 11 into the receiving groove 12.

[0053] In front of and behind the top end surface 3, three protrusions 21L, 21, 21R, 22L, 22, 22R arranged in the left-right direction are equally spaced. On the bottom surface 4, three grooves 32L, 31, 32R in the front-back direction that allow the three protrusions 21L, 21, 21R, 22L, 22, 22R arranged left and right to move in the front-back direction are equally spaced left and right. The distance Wy between the contact surface 13 of the right side surface 7R and the protrusions 21R, 22R, and the distance Wy between the contact surface 13 of the left side surface 7L and the protrusions 21L, 22L are approximately half of the distance W Y Therefore, the concrete blocks 1, 1 can be stacked on top of them across adjacent left and right concrete blocks 1, 1.

[0054] Also, the front sides of the outer side wall front part 41 and the inner side wall central part 44 overlap partially in the front-back direction at the overlapping part 41J, and the rear sides of the outer side wall rear part 42 and the side wall central part 44 overlap partially in the front-back direction at the overlapping part 42J. Therefore, by overlapping the upper and lower concrete blocks 1, 1 so that the protrusions 21L, 21R, 22L, 22R fit into the overlapping parts 41J, 42J, the movement of the upper concrete block 1 in the groove width direction can be restricted. Also, when the upper concrete block 1 is overlapped directly above the lower concrete block 1, the left and right protrusions 21L, 22L, 21R, 22R are sandwiched between the left and right side wall front parts 41, 41 and the left and right side wall rear parts 42, 42 which are side walls, and the movement of the concrete block 1 in the width direction is restricted.

[0055] Furthermore, a through-hole 15 is formed in the center of the block body 2. The through-hole 15 has a substantially hexagonal shape and is a sling attachment hole to which an attachment (not shown) of a sling can be locked. Therefore, the concrete block 1 can be easily lifted and unloaded using the through-hole 15. Moreover, since the through-hole 15 is formed so as to expand from the top end surface 3 toward the bottom surface 4, it can be stably lifted by the attachment.

[0056] Also, notches 55, 55 are provided at the bottom surfaces 4, 4 of the left and right side surfaces 7L, 7R of the block body 2. Therefore, a lifting arm (not shown) can be inserted into the notches 55, 55 at the bottom of the installed concrete block 1, and the concrete block 1 can be lifted by hooking this arm on the groove bottom 39T.

Embodiment

[0057] Figs. 10 to 14 show Embodiment 2 of the present invention. The same parts as those in Embodiment 1 are denoted by the same reference numerals, and the description thereof is omitted. In this example, it is an example in which the concrete block 1 is used for a sand control dike 71 provided in a river 70. The sand control dike 71 is a structure that receives unnecessary sediment flowing out from upstream such as debris flow and adjusts the amount of sediment flowing downstream by receiving the accumulated sediment little by little and flowing it out.

[0058] The sand control dike 71 is formed by arranging a plurality of concrete blocks 1 side by side in the left-right direction (the width direction of the river 70) and stacking them. Each stage of the concrete block 1 is arranged such that the side protrusion 11 on the front side surface 5 fits into the receiving groove 12 on the rear side surface 6 of the concrete block 1 adjacent in the left-right direction with the side protrusion 11 facing one side in the left-right direction (the left side in the figure) of the sand control dike 71, and a plurality of concrete blocks 1 are arranged with their positions aligned in the front-rear direction (the length direction of the river 70). That is, in the sand control dike 71, the concrete blocks 1, 1... adjacent in the vertical and front-rear (the length direction of the river) directions are arranged side by side and stacked with the positions of the contact surfaces 13 on the front side surface 5 aligned.

[0059] Still, in this example, two concrete blocks 1, 1 are provided in a stacked manner on each step, and on each step, the concrete block 1 is stacked directly above the lower concrete block 1.

[0060] Also, as shown in FIGS. 10 and 12, the front surface 71A of the sand control dike 71 faces upstream of the river 70, and the upper and lower concrete blocks 1, 1 are stacked such that the left protrusions 21L, 22L of the lower concrete block 1 fit into the right groove portion 32R of the upper concrete block 1. Therefore, on the front surface 71A, four protrusions 21, 21, 22R, 22R appear above the top surface 3. Incidentally, in FIG. 12, the protrusions 21R, 22R of the upper concrete block 1 are positioned directly above the protrusions 21L, 22L of the lower concrete block 1.

[0061] Also, as shown in FIGS. 13 to 14, on the rear surface 71B of the sand control dike 71, the upper and lower concrete blocks 1, 1 are stacked such that the central and left groove portions 31, 32L of the upper concrete block 1 fit the central and right protrusions 21, 22, 21R, 22R of the lower concrete block 1. Therefore, on the rear surface 71B, two protrusions 22L, 22R appear above the top surface 3.

[0062] By stacking the concrete blocks 1, 1... in this way, the slope of the rear surface 71B of the sand control dike 71 becomes steeper than the slope of the front surface 71A.

[0063] Also, as an effect of the embodiment, after stacking the upper concrete block 1 on the lower concrete block 1, the upper concrete block 1 can be shifted in the length direction of the groove portions 32L, 31, 32R (the width direction of the river 70), so the workability is improved.

[0064] In addition, the concrete blocks 1, 1,... adjacent to each other vertically and longitudinally (in the length direction of the river 70) are arranged side by side and stacked with the contact surfaces 13 of the front surfaces 5 aligned. The upper and lower concrete blocks 1, 1 are overlapped such that the left protrusions 21L, 22L of the lower concrete block 1 fit into the right groove portions 32R of the upper concrete block 1. As shown in FIG. 12, the left protrusions 21L, 22L of the lower concrete block 1 are locked to the front portion 41 and rear portion 42 of the right side wall of the upper concrete block 1, preventing the upper concrete block 1 from shifting in the direction of arrow N.

[0065] Also, at the rear surface 71B of the sand prevention dike 71, the upper and lower concrete blocks 1, 1 are overlapped such that the central and right protrusions 21, 22, 21R, 22R of the lower concrete block 1 fit into the central and left groove portions 31, 32L of the upper concrete block 1. As shown in FIG. 13, the central protrusions 21, 22 of the upper concrete block 1 are locked to the front portion 41 and rear portion 42 of the left side wall of the lower concrete block 1, preventing the upper concrete block 1 from shifting in the direction of arrow N.

[0066] Furthermore, since it has three protrusions 21L, 21, 21R in the width direction and three groove portions 31L, 31, 31R, different angles can be formed at the front surface 71A and the rear surface 71B depending on the stacking method.

Embodiment

[0067] FIGS. 15 to 17 show Embodiment 3 of the present invention. The same parts as those in the above embodiments are denoted by the same reference numerals, and the description thereof is omitted and will be described in detail. In this example, an example of using the concrete block 1 for a revetment work which is a structure provided on a slope in contact with water such as a river or for an earth retaining work which is a slope structure is shown, and the revetment work 81 will be described as an example.

[0068] On the front surface of the slope surface 82, the concrete blocks 1 are stacked so that the side protrusions 11 on the front side surface 5 face one side in the left-right direction of the slope surface 82 (the left side in the figure), and the groove portions 32L, 31, 32R of the concrete blocks 1, 1... arranged in the left-right direction of the slope surface 82 are continuous in the front-rear direction of the concrete blocks 1, 1...

[0069] On the other hand, the concrete blocks 1 stacked vertically are arranged with a half shift in the left-right direction of the slope surface vertically. Specifically, the contact surface 13 of the front side surface 5 of the lower concrete block 1 and the central position X (Figure 7) of the rear side surface 6 are aligned with the contact surface 13 of the front side surface 5 of the upper concrete block 1. In Figure 17, the lower concrete block 1 is shown by a solid line and the upper concrete block 1 is shown by a broken line.

[0070] In this case, as shown in Figure 17, the central rear protrusion 22 of the lower concrete block 1 is sandwiched between the rear parts 42, 45 of the side walls of the upper concrete block 1, and the right rear protrusion 22R of the lower concrete block 1 is sandwiched between the central rear parts 36, 36 of the side walls of the upper concrete block 1. In this way, the lower protrusions 22, 22R are fitted into the groove portions 31, 32R of the upper concrete block 1. Also, the front protrusions 21, 22 of the lower part are fitted into the groove portions 31, 32R of the upper concrete block 1. In this way, the lower protrusions 22L, 22, 22R can restrict the movement of the upper concrete block 1 in the left-right direction (the front-rear direction of the revetment work) and integrate the upper and lower concrete blocks 1.

[0071] In addition, on the front surface 81A of the revetment work 81, the upper and lower concrete blocks 1, 1 are overlapped so that the central and right protrusions 21, 22, 21R, 22R of the lower concrete block 1 are fitted into the left and central groove portions 32L, 31 of the upper concrete block 1. Therefore, on the front surface 81A of the revetment work 81, two protrusions 21L, 22L appear on the top end surface 3.

[0072] By restricting the movement of the upper concrete block 1 in the width direction in this way with protrusions and groove portions, a structure can be constructed at a place where there is a risk of the addition of the back earth pressure.

[0073] Also, since the concrete blocks 1 stacked one on top of the other are arranged with a half shift in the left - right direction of the slope surface vertically, the abutting surfaces 13, 13 of the concrete blocks 1, 1 are not continuous in the front - rear direction, and a stable structure can be obtained.

Embodiment

[0074] Figs. 18 to 20 show Embodiment 4 of the present invention. The same parts as those in the above - mentioned embodiments are denoted by the same reference numerals, and the description thereof is omitted and will be described in detail. In this example, an example of using the concrete block 1 for a diversion weir 91, which is a dike - like structure for guiding the flow to suit the construction purpose, targeting river flow or tidal flow in a water area, is shown.

[0075] One concrete block 1 is arranged in each stage of the diversion weir 91. The concrete blocks 1 are arranged side by side and stacked in the same manner as in Embodiment 3. On the front - face 91A side, four protrusions 21, 21R, 22, 22R appear on the top - end face 3, and on the rear - face 91B side, two protrusions 21L, 22L appear on the top - end face 3, and the concrete blocks 1 are stacked up.

[0076] By restricting the movement of the upper concrete block 1 in the width direction by the protrusions and grooves in this way, a structure can be constructed at a location where there is a risk of water force being applied.

Embodiment

[0077] Fig. 21 shows Embodiment 5 of the present invention. The same parts as those in the above - mentioned embodiments are denoted by the same reference numerals, and the description thereof is omitted and will be described in detail. In this example, an example of using the concrete block 1 for a structure that covers the installation surface such as the apron 101 or the ground - anchoring work with blocks is shown.

[0078] The bed protection structure 101 is formed by arranging concrete blocks 1 in a single row left and right on an installation surface 102 such as the riverbed of the river 70 so as to intersect the flow direction N of the river 70, arranging the side protrusions 11 on the front side surface 5 to the right, which is one of the left and right directions, and fitting them into the receiving grooves 12 on the rear side surface 6 of the concrete block 1 on the right side, and laying a plurality of rows of concrete blocks 1 side by side in the flow direction. And in this example, all the concrete blocks 1 are arranged with their side protrusions 11 facing one of the left and right directions.

[0079] Specifically, a first row R1 with 10 concrete blocks 1 arranged left and right is provided on the upstream side, a second row R2 is laid adjacent to the rear of this first row R1, and in the same manner, it is laid up to the tenth row R10. Note that the front side of the bed protection structure 101 as a structure is the upstream side of the river 70.

[0080] Thus, in this embodiment, Corresponding to claim 1, it exhibits the same operations and effects as the above-described embodiments.

Embodiment

[0081] FIG. 22 shows Embodiment 6 of the present invention. The same parts as those in the above-described embodiments are denoted by the same reference numerals, and the description thereof is omitted and will be described in detail. In this example, an example of using the concrete block 1 for the drop structure 111 as a structure is shown.

[0082] Similar to Embodiment 5, the concrete blocks 1 are laid on the installation surface 102, and at the center in the front-rear direction, a plurality of concrete blocks 1 are stacked vertically to form a drop portion 112.

[0083] A first row R1 to a sixth row R6 are provided on the upstream side, a first row R1 to a third row R3 on the downstream side are provided under the fourth row R4 to the sixth row R6 on the upstream side, and a fourth row R4 to a seventh row R7 are provided on the downstream side.

[0084] Thus, in this embodiment, it exhibits the same operations and effects as the above-described embodiments.

Embodiment

[0085] FIG. 23 shows Example 7 of the present invention. The same parts as those in the above embodiments are denoted by the same reference numerals, and the description thereof will be omitted and described in detail below. In this example, an example is shown in which the concrete block 1 is used for a structure that covers an installation surface such as a bed guarder or a ground stabilizer with blocks, and it is laid with the orientation of the concrete block 1 changed from that in Example 5.

[0086] For example, the position of the Nth concrete block 1 from the right side in the first row will be described as R1-N. In this example, N is an integer from 1 to 10, but it is not limited thereto.

[0087] For the concrete blocks 1 at positions R1-1 (the upper right corner in the figure) to R1-9, the side protrusions 11 are on the left side, which is one side in the left-right direction, and the rear side surface 6 is on the right side, which is the other side in the left-right direction. For the adjacent concrete blocks 1, 1 in the left-right direction, the side protrusions 11 are fitted into the receiving grooves 12 on the rear side surface 6.

[0088] The concrete block 1 at position R1-10 (the upper left corner in the figure) is laid with the side protrusion 11 on the front side surface 5 facing the rear side (the lower side in the figure), which is one side in the front-rear direction, and the side protrusion 11 of the concrete block 1 at position R1-9 is fitted into the receiving groove 12 on its left side surface 7L. Note that the front-rear direction of the concrete block 1 is an intersecting direction that intersects with the left-right direction.

[0089] For the concrete block 1 at position R2-10 after position R1-10, the side protrusion 11 on the front side surface 5 faces left, and the side protrusion 11 of the concrete block 1 at position R1-10 is fitted into the receiving groove 12 on its left side surface 7L. Also, for the concrete blocks 1 at positions R2-10 to R2-2, the side protrusions 11 on the front side surface 5 are laid facing right.

[0090] The concrete block 1 at position R2-1 is laid with the side protrusion 11 on the front side surface 5 facing the rear side, and the side protrusion 11 of the concrete block 1 at position R2-2 is fitted into the receiving groove on its right side surface 7R.

[0091] In the third column R3, similar to the first column R1, the concrete block 1 is arranged, and the side protrusion 11 of the concrete block 1 at position R2-1 is fitted into the receiving groove 12 on the right side surface 7R of the concrete block 1 at position R3-1.

[0092] In the fourth column R4, sixth column R6, eighth column R8, and tenth column R10 excluding the concrete block 1 at position R10-1, the concrete blocks 1 are arranged in the same manner as in the second column R2. Also, in the fifth column R5, seventh column R7, and ninth column R9, the concrete blocks 1 are arranged in the same manner as in the first column R1 and the third column R3.

[0093] Also, the concrete block 1 at position R10-1 has the side protrusion 11 on the front side surface 5 facing forward, and the side protrusion 11 is fitted into the receiving groove 12 on the left side surface 7L of the concrete block 1 at position R9-1.

[0094] In this way, the concrete blocks 1 arranged in a grid pattern in the front, back, left, and right directions have their side protrusions 11 fitted into the receiving grooves 12 of other concrete blocks 1, and the side protrusions 11 of other concrete blocks 1 are fitted into the receiving grooves 12, so that the concrete blocks 1 of the structure can be integrated.

[0095] Thus, in this embodiment, Corresponding to claim 1, It has the same functions and effects as the above-described embodiments.

[0096] Also, as an effect in the embodiment, from one side to the other side in the left - right direction, a plurality of concrete blocks 1 are arranged in the direction of the intersection of the flow, with their side protrusions 11 facing the other side in the left - right direction, and the side protrusions 11 are fitted into the receiving grooves 12 of the adjacent concrete blocks 1. The concrete block 1 at the other end in the left - right direction has its side protrusion 11 facing the water flow direction, and the concrete block 1 adjacent to it in the flow direction at the other end in the left - right direction has its side protrusion 11 facing the other side in the left - right direction. A plurality of concrete blocks 1 are arranged in the direction of the intersection of the flow with their side protrusions 11 facing the other side in the left - right direction, and the side protrusions 11 are fitted into the receiving grooves 12 of the adjacent concrete blocks 1. By doing so, the plurality of concrete blocks 1 can be integrated.

Embodiment

[0097] FIG. 24 shows Example 8 of the present invention. The same parts as those in the above - mentioned examples are denoted by the same reference numerals, and the description thereof is omitted and will be described in detail. In this example, an example of using the concrete block 1 for the drop structure 111 which is a structure is shown.

[0098] The concrete blocks 1 in the first row R1 to the sixth row R6 on the upstream side are arranged in the same manner as in the first row R1 to the sixth row R6 of Example 7. Below the fourth row R4 to the sixth row R6 on the upstream side, the first row R1 to the third row R3 on the downstream side are provided, and on the downstream side, the fourth row R4 to the seventh row R7 are provided. The concrete blocks 1 in the first row R1 to the sixth row R6 on the downstream side are arranged in the same manner as in the first row R1 to the sixth row R6 of Example 8.

[0099] Thus, in this embodiment, the same operations and effects as those in the above - mentioned embodiments are achieved.

[0100] Also, by arranging them with the side protrusions 11 fitted into the receiving grooves 12 of the adjacent concrete blocks 1 to form the drop part 112, a drop structure 111 having a stable structure against the water flow can be constructed. [Reference Example 1]

[0101] FIG. 25 shows the present invention Reference example 1 In this example, the three protrusions 21L, 21, 21R arranged in the left-right direction are integrally formed into a wide protrusion 26, and the three protrusions 22L, 22, 22R arranged in the left-right direction are integrally formed into a wide protrusion 27.

[0102] By fitting the wide protrusion 26 of the lower concrete block 1 into the left and right grooves 51 of the upper concrete block 1, the forward and backward movement of the upper concrete block 1 relative to the lower concrete block 1 can be restricted.

[0103] Therefore, it is suitable for situations where a force is applied to push the concrete block 1 in the forward and backward directions.

[0104] The present invention is not limited to the embodiment, and various modifications are possible within the scope of the present invention. For example, the shapes of the side projections and the receiving grooves are not limited to those in the embodiment, and may be arc-shaped. [Explanation of symbols]

[0105] 1. Concrete block 2 Block body 3 Top surface 4 Bottom 5 Front side 6 Posterior side 7L left side 7R Right side 12 Receiving groove 13 Contact surface 21 Central protrusion 21L left side Protrusions 21R Right side Protrusions 22 Central protrusion 22L left side Protrusions 22R Right side Protrusions 26 wide protrusions 27 wide protrusions 31 center of the groove part 32L left side of the groove part 32R right side of the groove part 61 retaining wall (structure) 70 river 71 sand prevention dike (structure) 81 bank protection work (structure) 91 diversion dike (structure) 101 bed protection work (structure) 111 drop structure (structure) H1 Front - to - rear width H2 Left - to - right width WY Spacing (spacing between protrusions arranged side by side left and right) Wy Spacing (spacing between the contact surface and the protrusion)

Claims

1. In a concrete block provided with a plurality of protrusions on the top end surface of the block body and a groove corresponding to the protrusion on the bottom surface of the block body, the groove is continuous between the opposing front and rear side surfaces of the block body and opens at the front and rear side surfaces, the block body has four side surfaces, namely the front side surface, the rear side surface, the left side surface, and the right side surface, a side protrusion is provided at the center in the left - right direction of the front side surface, and receiving grooves into which the side protrusion fits are provided at the center in the left - right direction of the rear side surface and at the center in the front - rear direction of the left and right side surfaces, on the front side surface, both left and right sides of the side protrusion are abutting surfaces that abut against the side surfaces of other block bodies; on the rear side surface, both left and right sides of the receiving groove are abutting surfaces that abut against the side surfaces of other block bodies; on the left and right side surfaces, both front and rear sides of the receiving groove are abutting surfaces that abut against the side surfaces of other block bodies, the block body has the same front - rear width, which is the distance between the abutting surfaces of the front and rear side surfaces, and the same left - right width, which is the distance between the abutting surfaces of the left and right side surfaces, on the front and rear sides of the top end surface, the left, central, and right protrusions arranged in the left - right direction are equally spaced in the left - right direction, and these protrusions have the same shape, the distance between the abutting surface of the left side surface and the left protrusion and the distance between the abutting surface of the right side surface and the right protrusion are each half of the distance between the protrusions arranged side by side in the left - right direction, left, central, and right grooves corresponding to the left, central, and right protrusions are provided, by fitting the side protrusion of the rear block body into the receiving groove on the rear side surface of the front block body, the grooves of the front and rear block bodies are aligned and communicate in a straight line in the front - rear direction, when the block bodies are stacked vertically and the protrusion of the lower block body is engaged with the groove of the upper block body, the upper block body is movable in the length direction of the groove, A concrete block, characterized in that by engaging the protrusion of the lower block body with the groove of the upper block body, the upper block body is positioned in the width direction of the groove with respect to the lower block body.

2. A construction method of a structure using a concrete block, characterized by stacking the concrete blocks according to Claim 1 to form a structure.

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