JP2011174228A - L-shaped concrete block and retaining wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an L-shaped concrete block capable of easily and inexpensively constructing a retaining wall. <P>SOLUTION: The L-shaped concrete block 1 includes a bottom board 2 and a wall board 3. The concrete block 1 further includes ribs 4, 4 which join the bottom board 2 to the wall board 3 and on which another L-shaped concrete block 1 is placed. Recesses and projections which are engaged with those of another L-shaped concrete block 1 when another L-shaped concrete block 1 is placed thereon to prevent these L-shaped concrete blocks from being displaced are formed on the bottom surface of the bottom board 2 and the upper surface of the wall board 3 or the upper surfaces of the ribs 4, 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a retaining wall having a relatively low height such as a terraced rice field and an L-shaped concrete block constituting the retaining wall.

  Today, there are a variety of concrete blocks used to build retaining walls and are used in many places. The most typical concrete block is a rectangular parallelepiped block, which is used for hedges for ordinary houses. For example, “high-precision block” according to Japanese Patent Laid-Open No. 9-216215 is one of them.

  A typical shape of the concrete block is an L-shaped block. This L-shaped concrete block is installed on the side of the road to prevent the road shoulder from collapsing. In many cases, the L-shaped concrete block can be configured as a retaining wall having a relatively low height. However, if it becomes a large L-shaped concrete block, the height of the wall slab will be about 5 m, and a high retaining wall can be comprised without stacking.

  By the way, even if the conventional L-shaped concrete block is small, it cannot be lifted by an operator and installed. And if it becomes a large L-shaped concrete block with a high wall slab, a big earth pressure will act and the wall slab may incline and protrude to the surface side.

  The “concrete block retaining wall” according to Japanese Patent Application Laid-Open No. 2008-144501 is a concrete building block retaining wall that is structurally economical and efficient in installation. That is, the retaining wall is composed of the first concrete block on the foundation concrete, the second concrete block for road widening installed on the upper part of the first concrete block, and the third concrete block on the upper part. Has been.

  In “Retaining wall structure and retaining wall construction method” according to Japanese Patent Application Laid-Open No. 2006-283292, a retaining wall for earth retaining, a concrete wall body made of cast-in-place concrete on the back side and a number of precast concrete blocks (molded) on the front side. High-strength that complements each defect of the cast-in-place concrete retaining wall and block retaining wall by constructing the block stacking wall body that is assembled to the left and right and up and down and the block stacking wall body. Retaining wall.

“L-shaped concrete retaining wall” according to Japanese Patent Application Laid-Open No. 2006-63655 makes effective use of a large amount of inorganic filler such as molten slag generated in large quantities due to a large amount of household waste, and has no influence on the quality of concrete. It is an L-shaped concrete retaining wall that ensures the stability of the concrete retaining wall without giving.
That is, a standing wall is formed in a box shape on the bottom plate of the retaining wall block of L-shaped concrete so as to be lower than the height of the retaining wall block, so that the inorganic filler can be filled.

  As described above, various concrete blocks constituting the retaining wall are known, but when the concrete blocks are stacked, the concrete is poured so as not to collapse or be displaced. For this reason, it is impossible for an amateur to construct a stable retaining wall using concrete blocks.

"High-precision block" according to JP-A-9-216215 “Concrete Block Retaining Wall” according to Japanese Patent Application Laid-Open No. 2008-144501 "Retaining wall structure and retaining wall construction method" according to JP-A-2006-283292 "L-shaped concrete retaining wall" according to JP-A-2006-63655

  As described above, the conventional concrete block constituting the retaining wall has the above-described problems. The problems to be solved by the present invention are these problems, and provide a retaining wall that can be constructed by simple construction and can be constructed even by an amateur, and an L-shaped concrete block used for construction of the retaining wall. To do.

  The L-shaped concrete block according to the present invention constitutes an L shape having a bottom plate and a wall plate, and is provided with a rib connecting the bottom plate and the wall plate. Here, the rib functions as a base for stacking another L-shaped concrete block upward in order to improve the bending strength of the bottom plate and the wall plate and to construct the retaining wall. Therefore, the rib generally has the same height as the upper end surface of the wall slab, the upper end surface is horizontal, and the rib extends greatly rearward to reach the same or near the rear end of the bottom plate.

  By the way, the retaining wall of this invention arranges the said L-shaped concrete block on a basic concrete surface, and another L-shaped concrete block is mounted on the arranged L-shaped concrete block. That is, they are stacked on the wall plate upper end surface and the rib upper surface. And the unevenness | corrugation which mutually meshes may be provided so that the L-shaped concrete block mounted on the top may not shift, or a position shift prevention member may be interposed between the upper and lower L-shaped concrete blocks. Moreover, the compacted soil is filled between the ribs of the stacked L-shaped concrete blocks.

  The L-type concrete block according to the present invention has a rib connecting the bottom plate and the wall plate, and the rib aims to improve the strength of the L-type concrete block, and another L-type concrete block is provided at the upper end of the wall plate and the rib. Can be placed. Therefore, a retaining wall having a predetermined height can be constructed with the L-shaped concrete block. In this case, concrete is cast on the foundation on which the lower L-shaped concrete block is placed, but the others are only filled with the soil pressed between the rims on the rear side of the wall plate of the L-shaped concrete block.

Therefore, the construction of the retaining wall is easy, the construction period is short and the cost is low. And a stable retaining wall is constructed by filling soil between the ribs of the L-shaped concrete block. In addition, since each L-shaped concrete block is prevented from being displaced, the shape of the retaining wall is not deformed or collapsed.

L-shaped concrete block according to the present invention. Retaining wall constructed of L-shaped concrete block. Another embodiment of an L-shaped concrete block. The example which shows a position shift prevention member.

  FIG. 1 shows an embodiment of an L-shaped concrete block 1 according to the present invention, in which 2 represents a bottom plate, 3 represents a wall plate, and 4 represents a rib. The wall plate 3 stands upright with respect to the bottom plate 2 to form an L shape. The ribs 4 and 4 connect the bottom plate 2 and the wall plate 3 to reinforce the strength of the L-shaped concrete block 1. The ribs 4 and 4 are provided at two positions at a predetermined interval, and the upper surfaces 5 and 5 of the ribs 4 and 4 have the same height as the upper end surface 6 of the wall slab 3.

  The ribs 4 and 4 extend rearward and extend to the same position as the rear end of the bottom plate 2. In this way, another rib-shaped concrete block 1 can be mounted by extending the ribs 4 and 4 rearward and making the upper surfaces 5 and 5 the same as the upper end surface 6 of the wall slab 3. FIG. 2 is a specific example showing a retaining wall structure according to the present invention, and this retaining wall has a structure constructed by stacking L-shaped concrete blocks 1, 1... Shown in FIG.

  The retaining walls shown in FIG. 2 are stacked in three stages. The lower L-shaped concrete blocks 1a, 1a,... Are installed on the foundation concrete 7 inclined rearward. The foundation concrete 7 is leveled so that the upper surface is inclined by placing concrete on the leveled ground, and a plurality of L-shaped concrete blocks 1a, 1a,. Arranged.

  And the space 8 formed on the back side of the wall slabs 3, 3... Of the L-shaped concrete blocks 1a, 1a. Hardened. In this state, other L-shaped concrete blocks 1b, 1b,... Are placed on the L-shaped concrete blocks 1a, 1a,. Here, the L-shaped concrete blocks 1b, 1b,... Are arranged at positions shifted laterally by 1/2 pitch with respect to the lower L-shaped concrete blocks 1a, 1a,.

  The middle L-shaped concrete blocks 1b, 1b,... Are arranged with a 1/2 pitch lateral shift, so that the L-shaped concrete blocks 1b, 1b on both sides have a width of 1/2. As in the case of the lower L-shaped concrete blocks 1a, 1a, ..., the back side spaces 8, 8, ... of the wall slabs 3, 3, ... are filled with earth 9 and pressed.

  Further, L-shaped concrete blocks 1c, 1c,... Are installed on the arranged and installed L-shaped concrete blocks 1b, 1b,. The L-shaped concrete blocks 1c, 1c,... Are arranged at positions shifted by 1/2 pitch laterally with respect to the middle L-shaped concrete blocks 1b, 1b,. In the same manner, the spaces 8, 8... Are filled with soil 9 and pressed.

  Thus, the retaining wall of the present invention is constructed by stacking a plurality of L-shaped concretes 1, 1. In addition, a concave portion and a convex portion are formed on the joint surface and mesh with each other so that the stacked L-shaped concrete blocks 1, 1. That is, the convex portions 10, 10... Are formed on the upper surface of the rib of the L-shaped concrete block 1, and the concave portion is provided on the lower surface of the bottom plate 2.

  3 (a) and 3 (b) show another embodiment of the L-shaped concrete block 1 according to the present invention, and shows the back side. In the L-shaped concrete block 1 of (a), two ribs 4, 4 are provided, and in the L-shaped concrete block 1 of (b), three ribs 4, 4, 4 are provided. And each rib 4,4 ... is provided with holes 11, 11 ... penetrating.

  In the L-shaped concrete block 1 shown in the figure, concave grooves 12, 12... Are formed on the upper surfaces 5, 5. Through holes 13, 13... Are provided on both sides of 4. .. Can be fitted into the grooves 12, 12... Formed on the upper surfaces 5, 5.

  FIG. 4 is a specific example showing the position shift prevention member 14. The misalignment prevention member 14 has a fitting base 15 at the center, and flanges 16 and 16 are provided on both sides thereof. Therefore, the fitting base 15 is fitted in the concave groove 12 and attached so that the ribs 4 are sandwiched between the two flanges 16 and 16. Therefore, the flanges 16 and 16 of the misalignment prevention member 14 are fitted and positioned in the through holes 13 and 13 formed in the bottom plate 2 of another L-shaped concrete block 1 placed thereon. That is, in a state where the fitting base portion 15 is fitted in the concave groove 12 formed on the upper surface 5 of the rib 4, the upper portions of both the flanges 16, 16 protrude upward from the upper surface 5, and the protruding flanges 16, 16 are the through holes 13. , 13 can be fitted.

  The positional deviation prevention member 14 is merely a specific example, and it is also possible to form a hemispherical concave groove on the rib upper surface 5 and the bottom surface of the bottom plate 2 and fit a sphere as the positional deviation prevention member 14. Accordingly, one half of the spherical displacement preventing member is fitted into the concave groove on the top surface of the rib and the concave groove on the bottom surface of the bottom plate and positioned.

1 L-shaped concrete block 2 Bottom plate 3 Wall plate 4 Rib 5 Top surface 6 Top surface 7 Basic concrete 8 Space 9 Soil
10 Convex
11 holes
12 groove
13 Through hole
14 Misalignment prevention member
15 Mating base
16 brim

Claims (3)

In the concrete block constituting the retaining wall, the concrete block is an L-shaped concrete block having a bottom plate and a wall plate, provided with ribs for connecting the bottom plate and the wall plate and on which another L-shaped concrete block is placed, and The L-shaped concrete block is characterized in that when the L-shaped concrete block is placed on top, a concave portion and a convex portion that mesh with each other to prevent displacement are formed on the bottom surface of the bottom plate and the top surface of the wall plate or rib. In the concrete block constituting the retaining wall, the concrete block is an L-shaped concrete block having a bottom plate and a wall plate, provided with ribs for connecting the bottom plate and the wall plate and on which another L-shaped concrete block is placed, and An L-shaped concrete block characterized in that a concave portion into which a displacement-preventing member for preventing displacement is formed is formed on the bottom surface of the bottom plate and the top surface of the wall plate or rib when the L-shaped concrete block is placed on top. In a retaining wall constructed by stacking concrete blocks, the concrete block is an L-shaped concrete block having a bottom slab and a wall slab, and a rib is provided to connect the bottom slab and the wall slab, and another L-shaped concrete block is a wall slab. The retaining wall is characterized in that it is placed on the top surface of the rib and the space on the back side of the wall slab is filled with compacted soil, and the L-shaped concrete block placed on the rib is further prevented from being displaced.

Images