Retaining wall blocks

Abstract

To provide blocks for a retaining wall used at a corner part allowing efficiency of transportation and installation to be improved.SOLUTION: Blocks for a retaining wall 30 are configured such that a vertical connection edge 17 of a first block piece 10 provided with a block base body 40 and a vertical connection edge 27 of a second block piece 20 provided with a block base body 40 are connected rotatably within a predetermined angle. Both of the block base bodies 40 form the vertical connection edge 17 on a vertical edge of one side 42 in a horizontal direction of a vertical wall base part 41, and a base plate projecting body 48 is connected substantially rectangular to the vertical wall base part 41 at a position apart from the vertical connection edge 17 by a predetermined distance on a lower end part of the vertical wall base part 41. Connection reinforcement bars 50, 50A are placed at positions above an upper surface 48a of the bottom plate projecting body 48 by a predetermined distance in a height direction of the vertical wall base part 41. One end of each of the connection reinforcement bars 50, 50A is buried in the vertical wall base part 41, the other end are projected in a substantially horizontal direction from a surface 44 of the vertical wall base body 41.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a retaining wall block used for land development and the like. [Background technology]

[0002] Conventionally, when constructing a retaining wall using concrete blocks, corner blocks with a special shape were used for the corners in plan view (Patent Documents 1 to 3). In this case, the corner blocks were made by connecting a pair of block pieces so that they could rotate freely around a vertical axis, and the opening angle of both block pieces was adjusted. In addition, connecting rebars were protruding from the bottom ends of both block pieces, and other rebars were placed between the two block pieces so as to be fixed to the connecting rebars, and bottom concrete was poured into the bottom ends of both block pieces to fix both block pieces in place. In another structure, horizontal connecting rebars protrude from the underside of the vertical vertical walls (Patent Document 1). In this case, formwork may be used when constructing the bottom concrete. In another structure, a connecting rebar is extended from the underside of two straight wall bodies without a bottom plate (Patent Document 2). In this case, a horizontal bottom wall is formed at the lower edge of the vertical side wall, and a connecting rebar protrudes from the front edge of the bottom wall (Patent Document 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-247388 A [Patent Document 2] JP 2010-270473 A [Patent Document 3] JP 2010-261168 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional retaining wall blocks are not self-supporting if they have a structure consisting only of vertical side walls and no large area in contact with the ground (Patent Documents 1 and 3). In addition, all of the connecting rebars protrude from the vertical side walls or protruding parts, making the retaining wall blocks difficult to handle during transport (Patent Documents 1 to 3). One approach has been to connect two blocks together and transport them with the connecting rebars facing each other (Patent Document 1). [Means for solving the problem]

[0005] The present invention solves the above-mentioned problems by providing a bottom plate protrusion at the vertical wall base of a block base used in a retaining wall block, and arranging connecting steel bars above the bottom plate protrusion from the vertical wall base.

[0006] In other words, this invention is a corner block used by connecting a first vertical connecting edge of a first block piece having a block base with a second vertical connecting edge of a second block piece having a block base, and is a retaining wall block characterized by being configured as follows. (1) The block base has a horizontal bottom plate base formed at the lower end of the vertical wall base, and a plurality of approximately horizontal connecting bars protruding from the lower end of the vertical wall base a predetermined distance above the upper surface of the bottom plate base. (2) The first block piece forms a first vertical connecting edge at a vertical edge on one horizontal side of the block base, forms a bottom plate base in a substantially horizontal direction across the entire width of the lower end of the block base, and further forms the first A position at a specified distance from the vertical connecting edge And on the other side opposite to the first vertical connecting edge , and the bottom plate protrusions are provided in series. (3) The second block piece forms a second vertical connecting edge on the other vertical edge of the block base in the horizontal direction, forms a bottom plate base in a substantially horizontal direction across the entire width of the lower end of the block base, and further forms a bottom plate base at a tip end of the bottom plate base at a position a predetermined distance away from the second vertical connecting edge. And on one side opposite to the second vertical connecting edge , and the bottom plate protrusions are provided in series. (4) The first vertical connecting edge of the first block piece and the second vertical connecting edge of the second block piece are rotatably connected around a vertical axis to form a retaining wall block, and when the first block piece and the second block piece are connected at a connecting angle of 60 degrees to 120 degrees in a plan view, at least one of the connecting bars intersects and the protruding portions of the two bottom plates are formed so as not to interfere with each other. Effect of the Invention

[0008] In this invention, the first block piece and the second block piece have a bottom plate protrusion formed at the lower end of the vertical wall base, the connecting rebar protrudes from the vertical wall base, and the connecting rebar is positioned a predetermined distance above the upper surface of the bottom plate protrusion.This means that each block piece can stand on its own and part of the connecting rebar is protected by the bottom plate protrusion, making it easy to handle the retaining wall blocks during construction or before construction. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 shows a first block piece of the present invention, in which (a) is a plan view, (b) is a rear view, (c) is a left side view, (d) is a front view, (e) is a right side view, and (f) is a bottom view. [Diagram 2] FIG. 2A shows a cross-sectional view taken along line AA of the first block piece of the present invention, and FIG. [Diagram 3] FIG. 1 shows a second block piece of the present invention, in which (a) is a plan view, (b) is a rear view, (c) is a left side view, (d) is a front view, (e) is a right side view, and (f) is a bottom view. [Figure 4] FIG. 2A shows a cross-sectional view taken along line CC, and FIG. 2B shows a cross-sectional view taken along line EE of a second block piece of the present invention. [Diagram 5] 1 is a perspective view showing the configuration of a retaining wall block of the present invention. [Figure 6] 1(a) is an oblique view showing the retaining wall block of the present invention arranged together with other retaining wall blocks at a construction site, and FIG. 1(b) is an enlarged oblique view of only this retaining wall block taken out from FIG. [Figure 7] FIG. 13 is a perspective view showing the state in which reinforcing bars for constructing the base are placed. [Figure 8]1(a) to 1(c) are plan views showing the configuration of a retaining wall block of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] An embodiment of the present invention will be described with reference to the drawings.

[0011] 1. Structure of the first block piece 10 and the second block piece 20

[0012] (1) The retaining wall block 30 of this invention is composed of a first block piece 10 and a second block piece 20, and the first block piece 10 has a first vertical connecting edge 17 formed on a vertical edge of one side 42 of the block base 40, and the second block piece 20 has a second vertical connecting edge 27 formed on a side edge of the other side 43 of the block base 40.

[0013] (2) The block base 40 is formed into a substantially L-shape in side view by integrally connecting the base end side of a substantially horizontal bottom plate base 46 over almost the entire width of the block base 40 to the lower end edge of a substantially rectangular (height H0, width D0) vertical wall base 41. The length from the base end (front surface 44 of the vertical wall base 41) to the tip 46a of the bottom plate base 46 (= the protrusion amount of the bottom plate base 46) is approximately the thickness of the bottom plate base 46. In addition, a bottom protrusion 48 is formed in the middle of the bottom plate base 46 in the lateral direction (D0 direction) (FIGS. 1(d) and 3(d)), continuing from the tip side of the bottom plate base 46. The bottom protrusion 48 is formed with approximately the same thickness (vertical distance) as the bottom plate base 46.

[0014] (3) In addition, the base end side of the connecting rebar 50 is embedded in the vertical wall base 41, and the tip side of the connecting rebar 50 is made to protrude from the front surface 44 of the vertical wall base 41 in the block base 40 in a direction away from the front surface 44 of the vertical wall base 41 to form a protruding portion of the connecting rebar 50. The protruding portion of the connecting rebar 50 is disposed at a height of a distance H1 from the upper surface 47 (=upper surface 48b of the bottom plate protruding portion 48) of the bottom plate base 46, and is arranged at a predetermined interval over almost the entire length in the width D0 direction, and all the connecting rebars 50, 50 are combined to form a connecting rebar group. In addition, the protruding portions of the connecting rebars 50, 50 are arranged so that the tips 50a are approximately the same in a planar view, and the tip 50a of the protruding portion of the connecting rebar 50 is formed so as to protrude beyond the tip 46a of the bottom plate base 46 but not beyond the tip 48a of the bottom plate protruding portion 48 in a planar view (Figures 1(a)(c)(e), Figures 2(a)(c)(e)). The front surface 44 of the vertical wall base 41 of the block base 40 is formed substantially vertically at the upper portion 41a and gradually inclined so that the plate thickness increases from the middle position to the lower portion 41b, reaching the bottom plate base 41 (Figs. 1(c)(e), 2(c)(e)). The two small circles appearing on the vertical wall base 41 are drainage holes 53.

[0015] (4) The first block piece 10 is a block base 40, and a thick wall portion 11 is formed at the end of one side 42 of the vertical wall base 41, and an upper connecting protrusion 12 is formed at one side edge of the thick wall portion 11 from the upper end to the middle height at the upper part in the height H0 direction along the edge of one side. Therefore, a notch 14 (into which the lower connecting protrusion 22 of the second block piece 20 described later is inserted) is formed below the upper connecting protrusion 12. In addition, the upper connecting protrusion 12 is arc-shaped in a plan view, and a pin hole 13 is formed on the lower surface. The upper connecting protrusion 12 and the notch 14 form a first vertical connecting edge 17. In addition, a bottom plate base 46 is formed continuously with the vertical plate wall portion 41 at the lower end of the thick wall portion 11, similar to the vertical plate wall portion 41. The bottom plate base 46 is formed obliquely toward the upper connecting protrusion 12 (cutout 14) when viewed in a plan view, and the amount of protrusion decreases to connect to the upper connecting protrusion 12 (cutout 14) of the first vertical connecting edge 17 (Figures 1(a)(f), 3(a)(f)). In addition, in the block base 40 used in the first block piece 10, the bottom plate protrusion 38 is located about two-thirds from one side 41 (about one-third from the other side 42) in the width D0 direction (substantially horizontal direction) from one side 42 toward the other side 43 of the bottom plate base 46 (vertical wall base 41). In other words, the bottom plate protrusion 48 is located closer to the other side 43 than the one side 42 (first vertical connecting edge 17) in the width D0 direction. In addition, connecting rebar 50A is provided at the same height as connecting rebars 50, 50 (height H1 from upper surface 47 of bottom plate base 46) in thick portion 11. Connecting rebar 50A also has the same projection (anchorage length of connecting rebars 50, 50A) from surface 44 (surface of thick portion 11) of vertical wall base 41 as the other connecting rebars 50, 50, so tip 50a of connecting rebar 50A is in a position that protrudes further than tips 50a of the other connecting rebars 50, 50 in plan view.

[0016] (5) In addition, the second block piece 20 has a block base 40, and a thick wall portion 21 extending from top to bottom is formed at the end of the other side 42 of the vertical wall base 41. A lower connecting protrusion 22 is formed at the other side edge of the thick wall portion 21 from the lower end to the middle height at the lower part in the height H0 direction along the other side edge, and a notch 24 (into which the upper connecting protrusion 12 of the first block piece 20 is inserted) is formed above the lower connecting protrusion 22. Similarly to the upper connecting protrusion 12, the lower connecting protrusion 22 has a planar arc shape and a pin hole 23 is formed on the upper surface. The lower connecting protrusion 22 and the notch 24 form a second vertical connecting edge 27. Similarly to the vertical plate wall portion 41, a bottom plate base 46 is formed at the lower end of the thick wall portion 21 so as to be continuous with the vertical plate wall portion 41. The bottom plate base 46 is formed obliquely toward the lower connecting protrusion 22 when viewed in a plan view, and the amount of protrusion decreases to connect to the lower connecting protrusion 22 of the second vertical connecting edge 27 (Figures 1(a)(f), 3(a)(f)). In addition, in the block base 40 used in the second block piece 20, the bottom plate protrusion 38 is located about "one-third" from one side 41 (about "two-thirds" from the other side 42) in the width D0 direction (substantially horizontal direction) from one side 42 to the other side 43 of the bottom plate base 46 (vertical wall base 41). In other words, the bottom plate protrusion 48 is located closer to the one side 42 than the other side 42 (second vertical connecting edge 27) in the width D0 direction.

[0017] (6) In addition, in the block base 40 used in the second block piece 20, the connecting reinforcing bars 50, 50 are arranged at a height of a distance H2 from the upper surface of the bottom plate base. H1 <H2 It is set so that when the first block piece 10 and the second block piece 20 are connected, the two connecting rebars 50, 50 can be arranged without interfering with each other. In other words, H2 is set to be larger than H1 by approximately the outer shape of the connecting rebar to be used. Similarly to the first block piece 10, the connecting rebar 50A is provided in the thick portion 21 at the same height as the connecting rebars 50, 50 (height H2 from the upper surface 47 of the bottom plate base 46). The connecting rebar 50A also has the same projection (anchored length of the connecting rebars 50, 50A) from the surface 44 of the vertical wall base 41 (surface of the thick portion 21) as the other connecting rebars 50, 50, so that the tip 50a of the connecting rebar 50A is in a position that protrudes further than the tips 50a of the other connecting rebars 50, 50 in a plan view.

[0018] 2. Configuration of retaining wall block 30

[0019] (1) The first block piece 10 and the second block piece 20 formed as described above are constructed in the same manner as conventional blocks for retaining walls.

[0020] (2) In the first block piece 10 and the second block piece 20, the protrusion of the bottom plate base 46 from the front surface 44 of the vertical wall base 41 is small (approximately the thickness of the bottom plate base 46), but since there is a bottom plate protrusion 48, both block pieces 10, 20 can stand on their own by placing the bottom plate base 46 and the bottom plate protrusion 48 on the ground. In addition, the bottom plate protrusion 48 can prevent the connecting rebars 50, 50 from being bent due to a load being applied to the connecting rebars 50, 50 during movement.

[0021] (3) That is, the second block piece 20 is placed at a corner of the retaining wall to be constructed, and the lower part of the pin 32 is inserted into the pin hole 23 of the lower connecting protrusion 22 of the second block piece 20. Next, the first block piece 10 is lowered to the intended installation position (in this case, the first block piece 10 and the second block piece 20 are at about 90° in plan view) (FIG. 5), and the first block piece 10 is placed so that the lower locking protrusion 22 of the second block piece 20 is placed in the notch 14 of the first block piece 10. At this time, the upper part of the pin 32 is inserted into the pin hole 13 of the upper connecting protrusion 12 of the first block piece 10, and the upper connecting protrusion 12 of the first block piece 10 is placed in the notch 24 of the second block piece 20. The first block piece 10 and the second block piece 20 in this state, which are connected to each other, are called the retaining wall block 30 (FIGS. 5 to 7).

[0022] (4) In this state, the positions of the first block piece 10 and the second block piece 20 are finely adjusted so that they match the intended installation positions. In this case, the first block piece 10 and the second block piece 20 are connected by the pin 32 and can be slightly rotated around the pin 32, making it easy to adjust the positions. In this state, the connecting rebars 50, 50, 50A on one side of the first block piece 10 and the connecting rebars 50, 50A on one side of the second block piece 20 intersect in a plan view. As described above, in the first block piece 10, the connecting rebars 50, 50A are disposed at a height H1 from the upper surface 47 of the bottom plate base 46, and in the second block piece, the connecting rebars 50, 50A are disposed at a distance H2 (

[0023] (5) Next, retaining wall blocks 60, 60 used in the straight section of a conventional retaining wall are placed on the other side 43 of the first block piece 10 and one side 42 of the second block piece 20 (FIG. 6(b)). The conventional retaining wall block 60 also has a vertical wall base 61 and a bottom plate base 66. In this case, the vertical wall base 61 of the retaining wall block 60 has approximately the same external shape as the vertical wall base 41 of the block base 40 of the block pieces 10, 20.

[0024] ​(6) Next, necessary reinforcing bars 68, 68 are arranged in the area surrounded by the bottom plate base 46 of the first block piece 10 and the bottom plate base 46 of the second block piece 20 and the bottom plate base 66 of the straight-line retaining wall blocks 60, 60 (FIG. 7). Then, concrete 69 is poured in the area surrounded by the bottom plate base 46 of the first block piece 10 and the bottom plate base 46 of the second block piece 20 and the bottom plate base 66 of the straight-line retaining wall blocks 60, 60 (shown by the broken line in FIG. 7). Once the concrete 69 has hardened, the area surrounded by the bottom plate base 46 of the first block piece 10 and the bottom plate base 46 of the second block piece 20 is reinforced with the reinforcing bars 68, 68 to form the concrete 69, and the first block piece 10, the second block piece 20, and the retaining wall block 60 are fixed together. Furthermore, by backfilling soil on the concrete 69, the concrete 69 reinforced by the reinforcing bars 68, 68 will fix the retaining wall block 30 (first block piece 10, second block piece 20) and the retaining wall blocks 60, 60 together with the ground.

[0025] (7) Next, once the concrete 69 has hardened, soil is poured between the vertical wall bases 41, 61 of the retaining wall blocks 30, 60 in the same manner as in the conventional method, to complete the retaining wall (not shown).

[0026] 3. Other configurations of retaining wall blocks 30

[0027] (1) In the above embodiment, the first block piece 10 and the second block piece 20 of the retaining wall block 30 are formed such that the opening (connecting angle) of the front faces 44, 44 of the vertical wall bases 41, 41 in a plan view is about 90° (FIG. 8(c) and FIGS. 5 to 7). 180° 120° (Fig. 8(a)) ~ 120° (Fig. 8(b)) ) ~90° (Figure 8(c) )In this case, the bottom plate protrusion 48 of the first block piece 10 is located toward the other side 43 opposite the first vertical connecting edge 17, and the bottom plate protrusion 48 of the second block piece 20 is located toward the one side 42 opposite the second vertical connecting edge 27, and the heights H1, H2 of the connecting rebars 50, 50A are different, so that there is no interference even when the above-mentioned opening (connecting angle) is about 120° to 90° (FIGS. 8(b)(c)). Furthermore, if the weight of the concrete 69 or backfill soil allows, the opening (connecting angle) can be an acute angle of 90° or less (for example, 60°) (not shown).

[0028] (2) In addition, in the above embodiment, if the anchorage length within the concrete 69 permits, the tips 50a of the connecting bars 50A on the first vertical connecting edge 17 side (thick portion 11) of the first block piece 10 and the connecting bars 50A on the second vertical connecting edge 27 side (thick portion 21) of the second block piece 20 can be made to have the same protruding length as the tips 50a of the other connecting bars 50 (not shown), or can be bent toward the group of reinforcing bars (the side of the other connecting bars 50 arranged adjacently) (not shown).

[0029] (3) In the above embodiment, the bottom plate base 46 of the block base 40 may be omitted, and the bottom plate protrusion 48 may be formed directly from the lower end of the vertical wall base 41 (not shown). [Explanation of symbols]

[0030] 10 First block piece 12 Upper connecting protrusion of first block piece 14. First block piece notch 17 First vertical connecting edge of first block piece 20 Second block piece 22 Upper connecting protrusion of second block piece 24 Second block piece notch 27 Second vertical connecting edge of second block piece 30 Retaining wall blocks 40 Block Base 41 Vertical wall base of block base 42 One side of vertical wall base 43 Other side of vertical wall base 46 Bottom plate base of block base 46a Tip of base of bottom plate 47 Upper surface of base of bottom plate 48 Bottom plate protrusion 48a Tip of bottom plate protrusion 48b Upper surface of bottom plate protrusion 50, 50A connecting steel bars 50a End of connecting bar 60 Straight retaining wall blocks 61 Vertical wall base of straight section retaining wall block 62 Base plate of straight section retaining wall block 68 Reinforcing steel bars 69 Concrete

Claims

[Claim 1] A retaining wall block is a corner block used by connecting a first vertical connecting edge of a first block piece having a block base with a second vertical connecting edge of a second block piece having a block base, characterized in that it is configured as follows. (1) The block base has a horizontal bottom plate base formed at the lower end of the vertical wall base, and a plurality of approximately horizontal connecting bars protruding from the lower end of the vertical wall base a predetermined distance above the upper surface of the bottom plate base. (2) The first block piece forms a first vertical connecting edge on one horizontal vertical edge of the block base, and forms a bottom plate base in a substantially horizontal direction across the entire width of the lower end of the block base. Furthermore, a bottom plate protrusion is connected to the tip of the bottom plate base at a position a predetermined distance away from the first vertical connecting edge and toward the other side opposite the first vertical connecting edge. (3) The second block piece forms a second vertical connecting edge on the other horizontal vertical edge of the block base, and forms a bottom plate base in a substantially horizontal direction across the entire width of the lower end of the block base. Furthermore, a bottom plate protrusion is connected to the tip of the bottom plate base at a position a predetermined distance away from the second vertical connecting edge and toward the opposite side of the second vertical connecting edge. (4) The first vertical connecting edge of the first block piece and the second vertical connecting edge of the second block piece are rotatably connected around a vertical axis to form a retaining wall block, and when the first block piece and the second block piece are connected at a connecting angle of 60 degrees to 120 degrees in a plan view, at least one of the connecting rebars intersects and the protruding portions of the two bottom plates are formed so as not to interfere with each other.

Images