JP2011047190A - Retaining-wall block, parts for retaining wall, and retaining wall construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a retaining-wall block which is easy to fit in an environment where the retaining-wall block is installed, parts for a retaining wall having the retaining-wall block, and a method of constructing the retaining wall using the parts for the retaining wall. <P>SOLUTION: The retaining-wall blocks 10 are horizontally arranged and piled up to form the retaining wall. A support 16, which abuts and supports the retaining-wall block positioned above when the retaining wall is formed, is installed so as to project from an upper surface 12 of a body portion 11. A space formed between a bottom surface 13 of the body portion 11 of positioned above the retaining-wall block and the upper surface 12 of the body portion 11 positioned below the retaining-wall block surrounds the support 16. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a retaining wall block used for retaining walls such as a river, a retaining wall part having the retaining wall block, and a retaining wall construction method using the retaining wall part.

  Today, a net-like futon basket (thickness of about 40 cm x length of 100 cm to 120 cm x length of 200 cm) knitted with an iron wire (diameter 5 mm) is piled up in a staircase with the stones inside. Used for surface protection and earth retaining. And, such a funnel is often used for economic reasons as a small retaining wall to prevent disaster recovery work and slope collapse. However, since iron wires are used for such a futon basket, it is not preferable in view of landscape because it is easily rusted and is not well-shaped. In addition, recently, cobblestones packed in the inside have become expensive and are often not available, so the wood-cutting stones have been substituted.

  In addition, in the futon basket, the iron wire is coated with various metals such as zinc to enhance the corrosion resistance and make it difficult to deteriorate over time, and as described in Patent Document 1, each side is made of bar steel, angle steel, etc. There is a so-called special (large-sized) futon basket that is made of steel and has rigidity and is shaped. Such a special futon basket is used as a retaining wall formed in a shape like a gravity type in a state filled with cracked stones and cobblestones.

  On the other hand, as a revetment at the waterside of rivers, etc., in addition to the retaining wall in which the above-mentioned futon baskets (including special futon baskets) are stacked, the retaining wall composed of so-called environmental blocks in consideration of harmony with the natural environment There is. And as this environmental block, as described in Patent Document 2, a natural stone or pseudo stone provided with an engaging portion, and as described in Patent Document 3, a pseudo block in which natural stone is exposed on the surface, As described in Patent Document 4, there is a large block provided with an inner space and an opening connected to the inner space.

  However, although the retaining wall using a pseudo block looks close to the natural environment, the water surface and the land are partitioned by the retaining wall surface, and it continues as one surface to the water. Therefore, it has been difficult to secure a place for aquatic organisms to lay eggs.

  In addition, the large block provided with an internal space and an opening connected to this internal space is a place where this internal space lays eggs and grows aquatic organisms. During the season, the breeding of boufras is encouraged in the block. Also, if the river increased due to heavy rain, gravel and earth accumulated in the block, and the function of the interior space could not be performed. Furthermore, since the concrete surface is continuous, the concrete surface is conspicuous at the waterside, which is not preferable for the landscape.

JP-A-6-116919 Japanese Patent Laid-Open No. 11-310913 JP-A-9-3937 JP-A-8-284130

  Accordingly, the present invention provides a retaining wall block that forms a retaining wall that is easily adapted to the environment where it is installed, a retaining wall part having the retaining wall block, and a retaining wall construction method using the retaining wall part. The purpose is to do.

  In order to solve the above-mentioned problem, the retaining wall block of the present invention is a retaining wall block that is arranged in the lateral direction and stacked to form a retaining wall, and the retaining wall block located above when the retaining wall is formed. A support portion that abuts and supports is protruded from the upper surface of the main body portion, and a gap formed between the bottom surface of the main body portion of the retaining wall block located above and the upper surface of the main body portion of the retaining wall block located below is supported by the support portion. It is characterized by being able to surround the part.

  In order to solve the above problems, the retaining wall part of the present invention has two or more retaining wall blocks, and the retaining wall blocks are connected with an interval between adjacent ones. Features.

  In order to solve the above problems, the retaining wall construction method of the present invention uses the retaining wall parts, and at least a part of the retaining wall parts located above when stacked are adjacent to each other. It arrange | positions so that it may straddle between the parts for retaining walls.

  Although it is not the present invention, the retaining wall block of the reference invention is a retaining wall block that is arranged in the lateral direction and stacked to form a retaining wall, and abuts against the retaining wall block located above when the retaining wall is formed. The support part is supported on the upper surface of the main body part, the upper part is provided with an engagement protrusion, and the engagement concave part is formed on the bottom surface of the main body part. The center position of the engagement protrusion and the center position of the engagement recess in plan view are shifted so that a gradient can be formed in the wall surface portion of the wall.

  Further, the retaining wall block of another reference invention is a retaining wall block that is arranged in the horizontal direction and stacked to form a retaining wall, and supports the retaining wall block positioned above when the retaining wall is formed. The width of the surface on the front side and the surface on the back side of the wall surface are different so that the wall surface of the retaining wall is curved in the horizontal direction when the support part is projected on the upper surface of the main body part and the retaining wall is formed. It is characterized by.

  And the retaining wall block of these reference inventions also has two or more retaining wall blocks and is connected with an interval between adjacent ones, like the retaining wall block of the present invention. It can be used for the characteristic retaining wall parts.

  Here, the aspect of each element in this invention is illustrated below.

1. Retaining wall block The retaining wall block has a gap between the bottom surface of the main body of the retaining wall block located above when stacked and the upper surface of the main body of the retaining wall block located below. A vertical space is formed between the bottom surface of the main body portion of the retaining wall block positioned and the upper surface of the main body portion of the retaining wall block positioned below.
Although there is no particular limitation on the mode of the retaining wall block, natural circulation of animals and plants is likely to occur. Therefore, when the retaining wall is formed, adjacent ones in the lateral direction overgrow the plants between each other or water tanks. It is preferable that they are connected with a space for inhabiting living organisms. When the retaining wall is formed in the space between the laterally adjacent ones, the main body portion of the retaining wall block located on the left of the retaining wall block adjacent in the left-right direction when viewed from the front of the retaining wall Left and right spaces between the right side and the left side of the main body of the retaining wall block located on the right, and the retaining wall block located in front of the retaining wall block adjacent in the front-rear direction when viewed from the front of the retaining wall There is a front-rear space between the rear side surface of the main body portion and the front side surface of the main body portion of the retaining wall block located behind.
In addition, since the relative displacement in the horizontal direction between the retaining wall blocks stacked vertically is less likely to occur, the engagement recess is provided with an engagement protrusion on the top and the engagement protrusion fits on the bottom surface of the main body. Is preferably recessed. Furthermore, when the retaining wall is formed, relative displacement without breakage due to external force becomes possible, so that adjacent ones are more preferably connected by a steel bar.
It is preferable that the center position of the engagement protrusion and the center position of the engagement recess in the plan view are shifted so that the wall surface of the retaining wall can be inclined when the retaining wall is formed.
Since the displacement of the retaining wall block is less likely to occur, it is preferable to include a restraining portion that is buried and restrained in crushed stone filled behind the wall surface portion of the retaining wall when the retaining wall is formed.
The shape of the main body portion of the retaining wall block is not particularly limited, and examples thereof include a prismatic shape, a cylindrical shape, a truncated pyramid shape, and a truncated cone shape.
Since the retaining wall can be formed even on topography that is curved in the horizontal direction, the surface of the main body on the front side of the wall surface so that the wall surface of the retaining wall curves in the horizontal direction when the retaining wall is formed It is preferable that the widths of the main body portion and the back surface are different.
When installed, since reflection of light such as sunlight is reduced, it is preferable that the side surface of the main body portion of the retaining wall block is provided with a relief such as a crushed stone pattern.
Although it does not specifically limit as a magnitude | size of the main-body part of a retaining wall block, It is preferable that it is 240-350 mm. Moreover, although it does not specifically limit as height, It is preferable that it is 150-220 mm.
The space between the adjacent ones in the horizontal direction when the retaining wall is formed to allow plants to grow or inhabit aquatic organisms, that is, the widths of the left and right spaces and the front and rear spaces Although it does not specifically limit as (space | interval), It is preferable that it is 30-50 mm.
The material of the retaining wall block is not particularly limited, but is preferably concrete because of excellent weather resistance and workability.
The form of the support part is not particularly limited, but an aspect in which at least a part is an engagement protrusion is preferable.
The shape of the engagement protrusion is not particularly limited, and examples thereof include a prismatic shape, a columnar shape, a truncated pyramid shape, a truncated cone shape, and a hemispherical shape. Moreover, although it does not specifically limit as a height of an engaging protrusion, It is preferable that it is 50-100 mm.
The shape of the engaging recess is not particularly limited, but is preferably substantially the same so as to correspond to the shape of the engaging protrusion. In addition, when the upper surface of the engaging protrusion is a support surface that abuts and supports the retaining wall block positioned above, the bottom surface of the engaging recess should be a surface that can come into surface contact with the upper surface of the engaging protrusion. Is preferred. The depth of the engaging recess is not particularly limited, but is preferably 50 to 100 mm.
The gap between the bottom surface of the main body portion of the retaining wall block positioned above and the upper surface of the main body portion of the retaining wall block positioned therebelow, that is, the height of the vertical space is particularly limited. Although it is not carried out, it is preferable that it is 10-30 mm.
Although it does not specifically limit as an aspect of a restraint part, The buried object formed near the front-end | tip of the rod-shaped part which protruded from the surface of the main body part which becomes the back side of the wall surface part of a retaining wall when a retaining wall is formed The aspect which has these can be illustrated.

2. Retaining Wall Parts Although the number of retaining wall blocks included in one retaining wall part is not particularly limited, it is preferably 30 or less. If it exceeds 30, the retaining wall parts will be heavy and large, making it difficult to handle.
The arrangement of the retaining wall blocks in the retaining wall parts is not particularly limited, but the retaining wall blocks may be arranged in a line so that only the left and right spaces or the front and rear spaces can be formed. You may line up so that it may become a several row | line | column mutually parallel so that both right-and-left space and front and back space may be made.
Retaining wall blocks can be easily stacked when stacked up and down, and the positions of adjacent retaining wall parts, that is, where the retaining wall block is not connected to the adjacent retaining wall block, are stacked. Since it can change for every stage, it is preferable that the space | interval of adjacent retaining wall blocks is constant.
When the retaining wall blocks in the retaining wall part are arranged in a plurality of parallel rows, the retaining wall block is missing because the retaining wall can be formed with a smaller number of retaining wall blocks. It is preferable to have a deletion site.
Although it does not specifically limit as a space | interval between retaining wall blocks, It is preferable that it is 30-50 mm.
The member for connecting the blocks is not particularly limited, but is excellent in flexibility, strength, and corrosion resistance. Therefore, a steel bar whose surface is coated with aluminum, zinc, nickel, or an alloy thereof, a stainless steel bar, etc. Is preferred.
The thickness of these steel bars is not particularly limited, but is preferably 5 to 9 mm.

3. Retaining Wall The shape of the retaining wall is not particularly limited, but it is preferably a stepped shape that approaches the slope as the wall surface of the retaining wall formed by stacking the retaining wall parts is upward.
Moreover, although it does not specifically limit as height of a retaining wall, In the case of retaining walls, such as a waterside and a river, it is preferable that it is 1-3m.

  According to the present invention, it is possible to form a retaining wall that is easily adapted to the environment where it is installed.

It is a perspective view of the retaining wall block of Example 1 of this invention. It is sectional drawing of the retaining wall block. It is a top view of the retaining wall block of Example 1 of this invention, and the part for retaining walls which connected it. It is sectional drawing of the retaining wall for revetment using the part for retaining walls, and the top view of some retaining wall parts of the 1st step. It is sectional drawing and the top view of the top edge part vicinity of the retaining wall for the revetment. It is a top view near the side edge part of the retaining wall for the revetment. It is sectional drawing of the retaining wall for slope protection using the part for retaining walls. It is a perspective view of a part of retaining wall using the part for retaining walls. It is a perspective view from the 1st step to the 5th step of the wall portion and the holding portion of the retaining wall filled with the filling material in the space surrounded by the retaining wall parts. It is a plane schematic diagram which shows the arrangement | sequence of the part for retaining walls from the 1st step of the retaining wall to the 5th step. It is a one part perspective view of a retaining wall when connecting to the retaining wall and using the part for retaining walls. Sectional drawing of the retaining wall which filled the space enclosed by the part for retaining walls which connected the retaining wall block of Example 1 of this invention with the filling material, and the plane schematic diagram which shows the row | line | column of the first stage retaining wall part It is. It is sectional drawing of the other retaining wall which filled the space enclosed by the part for the same retaining wall with the filling material, and a plane schematic diagram which shows the arrangement | sequence of a part of retaining wall part of the 1st step. It is a perspective view of a part of another retaining wall in which the filling material is filled in the space surrounded by the retaining wall parts. It is the perspective view and sectional drawing of the retaining wall block of Example 2 of this invention. It is the front view and top view of another retaining wall block of Example 2 of this invention. It is a top view of the part for retaining walls of Example 3 of this invention. It is a top view of another part for retaining walls of Example 3 of the present invention. It is the perspective view of a part of wall surface part of the retaining wall using the part for retaining walls, and the top view of the parts for 1st and 2nd retaining walls. It is a top view of another part for retaining walls of Example 3 of the present invention. It is the perspective view of a part of wall surface part of the retaining wall using the part for retaining walls, and the top view of the 1st stage retaining wall part. It is a one part perspective view of the wall surface part of the retaining wall using the part for retaining walls. It is the top view and perspective view of another part for retaining walls of Example 3 of this invention. It is the top view and perspective view of another part for retaining walls of Example 3 of this invention. 2 is a perspective view and a cross-sectional view of a retaining wall block 80. FIG. 2 is a perspective view and a side view of the retaining wall block 100. FIG. It is sectional drawing of the retaining wall using the retaining wall block, and a top view of the 1st stage retaining wall block.

  The retaining wall block 10 according to the first embodiment of the present invention and the retaining wall part 20 connecting the retaining wall blocks 10 will be described with reference to FIGS.

  As shown in FIGS. 1 and 2, the retaining wall block 10 includes a regular quadrangular columnar main body 11 and a regular quadrangular pyramid-shaped engaging protrusion 16 projecting substantially at the center of the upper surface 12 of the main body 11. The concrete block (weight is about 20 kg).

  The dimensions of the main body 11 are 243 mm on one side and 150 mm in height. The main body 11 has a relief formed at the center of the upper surface 12, a relief of a slate pattern is formed on the entire side surface 15, and an engaging recess 14 is provided in the shape of a regular quadrangular pyramid substantially at the center of the bottom surface 13. Has been. The engaging recess 14 has an opening having a side of 132 mm, a side of the bottom 19 having a side of 95 mm, and a depth of 50 mm so that the engaging protrusion 16 can be fitted with a margin.

  The engagement protrusion 16 has a bottom side of 112 mm, an upper side of 75 mm, and a height from the upper surface 12 of 70 mm. Then, a relief is formed at the center of the upper surface 18 of the engaging protrusion 16, and a slate-like relief is formed on the entire side surface 17 of the engaging protrusion 16.

  When the retaining wall block 10 is stacked, the engaging protrusion 16 of the retaining wall block 10 positioned below is fitted into the engaging recess 14 of the retaining wall block 10 positioned above. Further, the upper surface 18 of the engaging protrusion 16 of the retaining wall block 10 positioned below contacts the bottom surface 19 of the engaging recess 14 of the retaining wall block 10 positioned above to support the retaining wall block 10 positioned above. Since it is a support surface, the engagement protrusion 16 is a support portion. A gap of 20 mm surrounds the engaging protrusion 16 between the upper surface 12 of the retaining wall block 10 positioned below and the bottom surface 13 of the retaining wall block 10 positioned above. Further, when connecting the retaining wall block 10, a steel bar 21 is inserted near the center of the side surface 15.

  As shown in FIG. 3, the retaining wall parts 20 of the present embodiment are five types in which 2 to 6 retaining wall blocks 10 are arranged in a substantially straight line and connected. Adjacent retaining wall blocks 10 are connected to each other by a stainless steel bar 21 having a diameter of 5.5 mm with a center-to-center distance of 293 mm. The spacing between adjacent retaining wall blocks 10 is 50 mm. Yes.

  A retaining wall 30 for revetment using the retaining wall block 10 of this embodiment and five types of retaining wall parts 20 will be described with reference to FIGS. In the description of the retaining wall 30, the retaining wall part 20 includes the five types of retaining wall parts 20 of the present embodiment and the retaining wall block 10 of the present embodiment. The retaining wall block 10 of the present embodiment and the retaining wall block 10 in the retaining wall part 20 of the present embodiment are included.

  As shown in FIG. 4, the retaining wall 30 includes a wall surface portion 34 that has a staircase shape by stacking retaining wall parts 20 along a slope 27 that connects the riverbed 25 to the shore 26.

  Specifically, the retaining wall part 31 constituting the first stage, which is the lowest stage of the wall surface part 34, is on the foundation part 28 in which crushed stones are laid flat on the river bottom 25, and the retaining wall block 10 is on the shore 26. It is installed in two rows along. Adjacent retaining wall parts 20 are installed so as to have the same spacing (50 mm) as the spacing (50 mm) between the retaining wall blocks 10 in the retaining wall parts 20. Therefore, the first-stage retaining wall block 10 (the same is true for the second and subsequent retaining wall blocks 10) has left and right spaces B in both the left and right directions when viewed from the front of the retaining wall, and viewed from the front of the retaining wall. There is a front-rear space C on one side in the front-rear direction. And each width | variety (space | interval of retaining wall blocks) of the left-right space B and the front-back space C is 50 mm.

  The retaining wall part 32 constituting the second stage is formed by fitting the engaging projections 16 of the first stage retaining wall part 31 into its own engaging recess 14 to It is stacked on top. Therefore, the first-stage retaining wall block is on the upper side, the second-stage retaining wall block 10 is on the lower side (the same applies to the retaining wall blocks 10 on and after the third stage), and there is an upper and lower space A. The height of the upper and lower spaces is 20 mm. A part of the second-stage retaining wall part 32 is provided so as to straddle the adjacent first-stage retaining wall parts 31.

  The retaining wall parts 33 constituting the third stage are also installed so that the retaining wall blocks 10 are arranged in two rows along the shore 26. Then, in order to form a staircase, the engagement protrusions 16 of the second-stage retaining wall part 32 are fitted only in the engagement recesses 14 of the retaining wall blocks 10 in the offshore row, so that the third stage The retaining wall parts 33 are stacked on the second retaining wall part 32. Therefore, the second-stage retaining wall blocks 10 stacked on top of each other, the third-stage retaining wall block 10 on the lower side (the same applies to the retaining wall blocks 10 on and after the fourth stage), and the vertical space A is is there. The height of the vertical space A is 20 mm. A part of the third-stage retaining wall part 33 is provided so as to straddle the adjacent second-stage retaining wall parts 32.

  Thus, the retaining wall 30 is formed by stacking the retaining wall parts 20 so that the engaging protrusions 16 of the lower retaining wall part 20 are fitted in the engaging recesses 14 of the upper retaining wall part 20. A wall surface portion 34 is formed. Further, a crushed stone 29 (for example, a single-grain crushed stone of around S-40) or the like is filled between the wall surface portion 34 and the slope 27 as a backfill material.

  As shown in FIG. 5, concrete 35 is placed on the crushed stone 29 filled between the retaining wall part 20 and the slope 27 at the top end of the retaining wall 30.

  Further, as shown in FIG. 6, a retaining wall part 37 in which a retaining wall block 36 having a trapezoidal shape in plan view is connected to the side end portion in the direction along the shore 26 of the retaining wall 30. .

According to such a retaining wall 30, the following effects (a) to (g) can be obtained.
(A) Between the retaining wall blocks 10, there is an upper and lower space A having a height of 20 mm so as to surround the engagement protrusion 16 in the vertical direction, and a left and right space B having a width of 50 mm in the horizontal direction and There is a front-rear space C, and there are extended spaces extending in the same width as the left and right spaces B and the front-rear space C. Therefore, the upper-lower space A, the left-right space B, and the front-rear space C are all in communication. These spaces are connected from the front surface to the back surface of the wall surface portion 34. Therefore, the retaining wall 30 has a lot of space, and can ensure the survival of insects and aquatic plants that inhabit the water and bring about their natural circulation. Therefore, it is familiar to the installed environment.
(B) Since the vertical space A, the left and right space B, and the front and rear space C do not impede the flow of water, the retaining wall 30 is not encouraged to breed such as a bow fratern even in a season in which the water crawls. Even if the water is increased, gravel and earth and sand are difficult to accumulate in these spaces.
(C) The vertical space A, the left and right space B, and the front and rear space C are habitat spaces such as aquatic plants and aquatic animals, and there is no stagnation of water, so that the retaining wall 30 is likely to be naturally circulated.
(D) While using the retaining wall parts 20 in which the adjacent retaining wall blocks 10 are connected to each other by a stainless steel bar 21, the upper and lower retaining wall blocks 10 are connected to each other by inter-filled concrete or meshed together. First, since the lower engaging projection 16 is connected and restrained by fitting into the upper engaging recess 14, the retaining wall blocks 10 can be displaced relative to each other without being broken by an external force. The retaining wall 30 can flexibly cope with ground subsidence caused by an earthquake.
(E) The retaining wall 30 is preferable in view of the landscape because the retaining wall block 10 has many cuts and fewer continuous surfaces than the conventional environmental block, and has the vertical space A, the left and right space B, and the front and rear space C. It can express softness and can blend into the surroundings.
(F) Due to the vertical space A, the left and right space B, the front and rear space C, and the space of the crushed stone 29 filled between the wall surface portion 34 and the slope 27, the retaining wall 30 can perform the purification action of the moving water. .
(G) Since the retaining wall 30 has an upper and lower space A and a left and right space B, the ratio of sunlight reflected to the water surface by the concrete surface is less than that using a conventional environmental block, and has an effect on fish and the like. Can be small.

  Next, the retaining wall 40 for slope protection using the retaining wall block 10 and the five types of retaining wall parts 20 according to this embodiment will be described with reference to FIG. In the description of the retaining wall 40, the retaining wall part 20 includes the five types of retaining wall parts 20 of the present embodiment and the retaining wall block 10 of the present embodiment. The retaining wall block 10 of the present embodiment and the retaining wall block 10 in the retaining wall part 20 of the present embodiment are included.

  As shown in FIG. 7, the retaining wall 40 is provided on the slope 41 (which is also a slope) whose slope is steeper than the retaining wall 30 for revetment, so that the retaining wall blocks 10 arranged along the slope 41 are provided. Unlike the retaining wall 30 for revetment, the point which is 4 rows and the point where the suction prevention material 42 is provided so that the slope 41 may be covered are substantially the same as the retaining wall 30 for revetment. It is.

According to the retaining wall 40, the following effects (h) and (i) can be obtained.
(H) The retaining wall 40 has a function as a slope (slope such as a mountain) protection retaining wall by stacking the retaining wall parts 20 in a staircase shape, has a lot of space, vertical space A, left and right space B, and front and rear In the space C, plants grow, natural circulation of the plants easily occurs, and nature can be configured in a short time. Therefore, it is easy to adapt to the installed environment.
(I) The retaining wall 40 can easily handle heavy rain and spring water from the back of the slope by the vertical space A, the left and right space B, and the front and rear space C, and the adjacent retaining wall blocks 10 are made of stainless steel bar 21 And the upper and lower retaining wall blocks 10 are connected and restrained by fitting the lower engaging projections 16 into the upper engaging recesses 14. Since the relative displacements 10 are not caused by breakage due to external forces, even when heavy rain or spring water occurs, the slope 10 can follow the ground subsidence and prevent the slope collapse.

  Next, the retaining wall 60 using the retaining wall block 10 of this embodiment and the five types of retaining wall parts 20 will be described with reference to FIG. In the description of the retaining wall 60, the retaining wall part 20 includes the five types of retaining wall parts 20 of the present embodiment and the retaining wall block 10 of the present embodiment. The retaining wall block 10 of the present embodiment and the retaining wall block 10 in the retaining wall part 20 of the present embodiment are included.

  As shown in FIG. 8, the retaining wall 60 includes a stepped terrace 62 formed by the crushed stone 29 and the like along the slope 61, and the retaining wall block 10 along the slope 61 for each stage of the terrace 62. And wall surfaces 63 stacked in two rows.

  The retaining wall 60 can be used mainly in construction sites where a futon basket is used, and the same effects as those obtained with the retaining wall 30 and the retaining wall 40 can be obtained.

  Next, an intermediate filling space 56 surrounded by the retaining wall block 10 of the present embodiment and the five types of retaining wall parts 20 is formed, and the inner wall filling space 56 is filled with the intermediate filling material 57, or the revetment or law. The retaining wall for surface protection will be described with reference to FIGS. In the following description of these retaining walls, the retaining wall part 20 includes the five types of retaining wall parts 20 of the present embodiment and the retaining wall block 10 of the present embodiment. The block 10 includes the retaining wall block 10 of the present embodiment and the retaining wall block 10 in the retaining wall part 20 of the present embodiment. Moreover, according to such a retaining wall, the same effect as the effect obtained with the retaining wall 30 and the retaining wall 40 can be acquired.

First, a part formed by the retaining wall parts 20 (specifically, a wall surface portion 51 that becomes a wall surface of the retaining wall and a retaining portion 52 provided behind the wall surface portion 51) will be described.
As shown in FIG. 9 and FIG. 10, the retaining wall parts 20 are arranged so that the positions adjacent to each other change in each stage, that is, a part of the upper retaining wall part 20 is adjacent to the lower retaining wall. The type of retaining wall parts 20 (the number of connected retaining wall blocks 10 is different) is changed, or the arrangement of retaining wall parts 20 is changed so as to straddle the structural parts 20. 9 and 10, the outer edge of the retaining wall part 20 is indicated by a solid line, and the outer edge of the retaining wall block 10 is indicated by a broken line. In FIG. 10, the lowest level is the first level, and the second level and the third level are the order from the bottom.

  Further, as shown in FIG. 11, the spacing between the retaining portions 52 is wide, and the retaining portion 52 is where the retaining wall parts 20 constituting the wall surface portion 51 are adjacent to each other, that is, where the retaining wall parts 20 are adjacent to each other. When they are in the middle of each other, a retaining wall part 58 for connection may be provided so as to straddle and connect the retaining wall parts 20 of the wall surface 51. Also in FIG. 11, the outer edge of the retaining wall part 20 is indicated by a solid line, and the outer edge of the retaining wall block 10 is indicated by a broken line.

  In this manner, the retaining wall parts 20 stacked on top of each other are separated from each other so that the adjacent retaining wall parts 20 are connected to each other. Moreover, according to such a retaining wall, since the filling material 57 is not exposed, it is not necessary to consider the landscape, and it is possible to use the split stone as the filling material.

  Next, the retaining wall for revetment or slope protection in which the filling space 56 surrounded by the retaining wall parts 20 is filled with filling material 57 such as chestnut or single-grain crushed stone will be described.

  As shown in FIG. 12, the retaining wall 50, which is one of such retaining walls, includes a wall surface part 51 and a retaining wall part 52 provided behind the wall surface part 51 (on the slope 55 side). 20 is comprised. The wall surface portion 51 is configured such that the retaining wall blocks 10 are arranged in a line along the slope 55 on the foundation portion 28 in which crushed stone is laid flat, and the stacked retaining wall parts 20 are arranged on the upper side. Indeed, it has a staircase shape that approaches the slope 55 side. A plurality (five) of the retaining portions 52 are provided behind the wall surface portion 51 at intervals. The inside filling space 56 surrounded by the wall surface portion 51 and the holding portion 52 is filled with the inside filling material 57, and the same thing as the inside filling material is provided between the inside filling material 57 and the slope 55. It is filled as a backfill material 59. In the schematic plan view showing the arrangement of the first-stage retaining wall parts, the outer edge of the retaining wall part 20 is indicated by a solid line, and the outer edge of the retaining wall block 10 is indicated by a broken line (FIG. 13 is the same). ).

  Moreover, the retaining wall 65 which is another one of such retaining walls is shown in FIG. The retaining wall 65 has a stepped wall surface portion 51 provided so that each step of the retaining wall block 10 is arranged in two rows along the slope 55, and the interval between the retaining portions 52 is wide. Unlike the retaining wall 50, the connecting retaining wall part 58 is used, and the other points are substantially the same as the retaining wall 50.

  Further, FIG. 14 shows a retaining wall 66 which is still another such retaining wall. The retaining wall 66 is different from the retaining wall 50 in that the slope is steep and the depth of the retaining portion 52 is small (one retaining wall block), and the other points are substantially the same as the retaining wall 50. It is.

  Next, an embodiment of a retaining wall block having a different aspect from the retaining wall block 10 will be described. In addition, also about the retaining wall block demonstrated here, like the retaining wall block 10, two or more can be connected by the steel bar 21, and it can be used as a part for retaining walls.

  As shown in FIG. 15, the retaining wall block 70 of the present embodiment protrudes approximately 20 mm from the upper surface 72 at a substantially central position with an interval of 25 mm from each end of the upper surface 72 of the main body 71. The point that the overlapping portion 73 provided with 78 is formed, and the upper surface 75 of the engaging projection 74 is provided with two grooves 76 that intersect each other, and the relief of the step is not formed. Unlike the block 10, the other points are substantially the same as the retaining wall block 10.

  According to the retaining wall block 70, in addition to the effects obtained when the retaining wall block 10 is used, when the retaining wall block 70 is stacked, the upper surface 77 of the overlapping portion 73 of the lower portion is positioned upward. Since the retaining wall block 70 is a supporting surface that abuts and supports the bottom surface 79 of the main body portion 71, the engaging projection 74 and the overlapping portion 73 are both supporting portions. Therefore, since the area of the support surface of the retaining wall block 70 is larger than the area of the support surface of the retaining wall block 10 (only the upper surface 18 of the engaging protrusion 16), the stability when stacked can be increased.

In addition to the retaining wall block shown above, there is also a retaining wall block obtained by changing the retaining wall block 10 of the first embodiment as follows, as shown in FIG.
(1) A retaining wall block 90 in which the side surface of the engaging protrusion 91 is a curved surface is shown in FIGS.
(2) A retaining wall block 92 in which a groove 93 having a depth of about 5 mm is recessed on the upper surface of the engaging protrusion is shown in FIGS.

  Next, a description will be given of retaining wall parts in which two or more rows in which a plurality of retaining wall blocks 10 are arranged in a substantially straight line are arranged and connected in parallel to each other. As the retaining wall part described here, a retaining wall block having a mode different from the retaining wall block 10 as described in the second embodiment may be used. Further, according to the retaining wall part of the present embodiment, the same effect as that obtained with the retaining wall part 20 can be obtained, and two or more rows in which the retaining wall blocks 10 are arranged are connected side by side. Therefore, the retaining wall having the left and right spaces B and the front and rear spaces C can be easily formed in the retaining wall block 10.

  As shown in FIG. 17, the retaining wall part 23 of this embodiment has five rows in which six retaining wall blocks 10 are arranged in a row, and the retaining wall blocks 10 adjacent to each other are made of stainless steel. The 30 retaining wall blocks 10 are connected by connecting with the modified steel bar 21. The interval between adjacent retaining wall blocks 10 is 50 mm.

  According to the retaining wall part 23 of this embodiment, there is no contact between the blocks, and it is easy to install slope protection retaining walls, rivers, lakes and other revetment retaining walls that have more space around the blocks than the conventional construction method. Can be formed.

  As shown in FIG. 18A, the retaining wall part 43 of this embodiment uses seven retaining wall blocks 10, which are arranged in two rows, and the adjacent retaining wall blocks 10 are made of stainless steel. It is connected with a steel bar 21. And the space | interval of the adjacent retaining wall blocks 10 is 50 mm. Furthermore, in each row, a deletion portion 99 in which the retaining wall block is missing is formed.

  As shown in FIG. 18B, the retaining wall part 44 of the present embodiment uses five retaining wall blocks 10, which are arranged in two rows, and the adjacent retaining wall blocks 10 are made of stainless steel. It is connected with a steel bar 21. And the space | interval of the adjacent retaining wall blocks 10 is 50 mm. Furthermore, in each row, a deletion portion 99 in which the retaining wall block is missing is formed.

  As shown in FIG. 18C, the retaining wall part 45 of this embodiment uses five retaining wall blocks 10, which are arranged in two rows, and the adjacent retaining wall blocks 10 are made of stainless steel. It is connected with a steel bar 21. And the space | interval of the adjacent retaining wall blocks 10 is 50 mm. Furthermore, in each row, a deletion portion 99 in which the retaining wall block is missing is formed. The retaining wall part 44 and the retaining wall part 45 are in a plane-symmetric relationship.

  As shown in FIG. 19, the retaining wall part 43, the retaining wall part 44, the retaining wall part 45, and the retaining wall part 20 of Example 1 in which two retaining wall blocks 10 are connected are combined to form the retaining wall. When the wall surface part is formed, the retaining wall part 43, the retaining wall part 44, and the retaining wall part 45 have the deleted portion 99, thereby reducing the number of retaining wall blocks 10 used when the retaining wall is formed. be able to.

  As shown in FIG. 20A, the retaining wall part 46 of the present embodiment uses eight retaining wall blocks 10, which are arranged in two rows, and the adjacent retaining wall blocks 10 are made of stainless steel. It is connected with a steel bar 21. And the space | interval of the adjacent retaining wall blocks 10 is 50 mm. Furthermore, in one row, a deletion portion 99 in which the retaining wall block is missing is formed.

  As shown in FIG. 20B, the retaining wall part 47 of this embodiment uses seven retaining wall blocks 10, which are arranged in two rows, and the adjacent retaining wall blocks 10 are made of stainless steel. It is connected with a steel bar 21. And the space | interval of the adjacent retaining wall blocks 10 is 50 mm. Furthermore, in one row, a deletion portion 99 in which the retaining wall block is missing is formed.

  As shown in FIGS. 21 and 22, when the retaining wall part 46 and the retaining wall part 47 are combined to form a wall surface portion of the retaining wall, a deletion portion 99 is added to the retaining wall part 46 and the retaining wall part 47. Therefore, the number of retaining wall blocks 10 used when forming the retaining wall can be reduced.

  As shown in FIG. 23, the retaining wall part 48 of the present embodiment uses seven retaining wall blocks 10, which are arranged in two rows, and the adjacent retaining wall blocks 10 are made of stainless steel deformed steel bars 21. Concatenated. And the space | interval of the adjacent retaining wall blocks 10 is 50 mm. Furthermore, in one row, a deletion portion 99 in which the retaining wall block is missing is formed.

  The retaining wall part 48 can be used by filling a crushed stone 29 or the like in a deletion portion 99. In addition, the retaining wall 66 shown in FIG. 14 can be easily formed.

  As shown in FIG. 24, the retaining wall part 49 of the present embodiment uses twelve retaining wall blocks 10, which are arranged in three rows, and the adjacent retaining wall blocks 10 are made of stainless steel bar 21. Concatenated. And the space | interval of the adjacent retaining wall blocks 10 is 50 mm. Further, a deletion portion 99 in which the retaining wall block is missing is formed in the middle row.

  The retaining wall part 49 can be used by filling the center (deletion point 99) of the retaining wall part 49 surrounded by the retaining wall block 10 with crushed stone 29 or the like.

  The present invention is not limited to the above-described embodiments, and can be embodied with appropriate modifications without departing from the spirit of the invention.

Next, two types of retaining wall blocks not according to the present invention will be described.
The retaining wall block 80 is made of concrete like the retaining wall block 10, and as shown in FIG. 25, the main body 81 has a rectangular column shape with a long side of 350 mm, a short side of 243 mm, and a height of 150 mm. . Then, an overlapping portion 83 is formed that protrudes 20 mm from one end of the upper surface 82 of the main body 81 to the other end. An engagement projection 84 having a regular quadrangular pyramid shape is formed at substantially the center of the upper surface 87 of the overlapping portion 83. The engagement projection 84 has a bottom side of 112 mm, an upper side of 75 mm, and a height from the upper surface 82 of 70 mm. ing. Further, an engagement concave portion 86 having a regular quadrangular pyramid shape is formed in the approximate center of the bottom surface 85 of the main body portion 81. The engagement recess 86 has the same size as the engagement recess 14 of the retaining wall block 10 so that the engagement protrusion 84 can be fitted with a margin. In addition, the retaining wall block 80 is made of a steel bar or the like in a space for allowing plants to overgrow or inhabit aquatic organisms when retaining walls are formed between adjacent ones, like the retaining wall block 10. It can also be linked.

  According to the retaining wall block 80, both the overlapping portion 83 and the engaging protrusion 84 serve as a supporting portion, and the support surface is wide, so that the stability when stacked can be increased. In addition, since the center position of the engagement protrusion 84 and the center position of the engagement recess 86 in the plan view are deviated from each other, a gradient (about 3 minutes) can be given to the wall surface when the retaining wall is formed by stacking. it can. In addition, a gap of 20 mm can be formed on the front side of the wall portion of the retaining wall between the bottom surface 85 of the main body portion 81 of the retaining wall block 80 positioned above and the upper surface 82 of the main body portion 81 of the retaining wall block 80 positioned below. ing.

  The retaining wall block 100 is made of concrete, like the retaining wall block 10, and the surface on the front side of the wall surface is wider than the surface on the back side of the wall surface, and when the retaining wall is formed, It has a restraining part that is buried and restrained in the crushed stone to be filled.

As shown in FIG. 26, the retaining wall block 100 has a main body portion 101 having a prismatic shape with a height of 150 mm, a width of the front surface 102 which is the front side of the wall surface portion 111 is 240 mm, and a rear surface 103 which is the back side of the wall surface portion 111. Is a trapezoidal shape in a plan view in which the width between the front surface 102 and the rear surface 103 is 240 mm. In addition, the upper surface 104 is formed with an overlapping portion 105 protruding 20 mm from the substantially center to the end on the rear surface 103 side.
A stainless steel bar 108 protrudes from the rear surface 103 and is 150 mm away from the rear surface 103. The tip of the steel bar 108 has a prismatic shape with a height of 100 mm, and the width of the surface 107 a facing the rear surface 103 is 100 mm. An embedded body 107 having a trapezoidal shape in plan view is provided.

  When the retaining wall block 100 is stacked, the upper surface 106 of the overlapping portion 105 of the retaining wall block 100 positioned below abuts and supports the bottom surface 109 of the main body 101 of the retaining wall block 100 positioned above. The overlapping portion 105 becomes a support portion so that a gap of 20 mm is formed between the upper surface 104 of the main body portion 101 of the retaining wall block 100 positioned below and the bottom surface 109 of the main body portion 101 of the retaining wall block 100 positioned above. It has become.

  The retaining wall 110 using the retaining wall block 100 will be described with reference to FIG. As shown in FIG. 27 (a), the retaining wall 110 is provided on a foundation portion 116 on which crushed stones are laid flat. Then, the retaining wall blocks 100 are stacked so that the wall surface portion 111 is on the slope 117 side as it goes upward in accordance with the slope of the slope 117. The buried body 107 of each retaining wall block 100 is buried in a backfill material 115 such as crushed stone filled between the wall surface portion 111 and the inclined surface 117.

  Further, like the arrangement of the first-stage retaining wall blocks 100 shown in FIG. 27B, the retaining wall blocks 100 are arranged so that the surfaces of the wall surface portions 111 are curved at intervals. .

According to the retaining wall block 100, the following effects can be obtained.
A gap of 20 mm can be provided on the front side of the wall surface portion of the retaining wall between the bottom surface 109 of the stacked upper retaining wall block and the upper surface 104 of the lower retaining wall block.
-Retaining walls can be formed on topographically curved terrain by arranging them at approximately equal intervals.
-Since the buried body 107 is fixed by the interlocking action caused by being buried in the backfill material 115, the positional deviation is less likely to occur.

DESCRIPTION OF SYMBOLS 10 Retaining wall block 11 Main body part 12 Upper surface 13 Bottom surface 14 Engaging recessed part 16 Engaging protrusion 20 Retaining wall part 21 Steel bar 23 Retaining wall part 30 Retaining wall 31 Retaining wall part 32 Retaining wall part 33 Retaining wall part 37 Retaining Wall Parts 40 Retaining Walls 43 Retaining Wall Parts 44 Retaining Wall Parts 45 Retaining Wall Parts 46 Retaining Wall Parts 47 Retaining Wall Parts 48 Retaining Wall Parts 49 Retaining Wall Parts 50 Retaining Walls 58 Retaining Wall Parts 65 Retaining Wall 66 Retaining Wall 70 Retaining Wall Block 71 Main Body 73 Overlapping 74 Engaging Protrusion 79 Bottom 90 Retaining Wall Block 91 Engaging Protrusion 92 Retaining Wall Block A Vertical Space B Left and Right Space C Front and Back Space

Claims (6)

Retaining wall blocks that are arranged side by side and stacked to form a retaining wall,
When the retaining wall is formed, a supporting part that abuts and supports the retaining wall block located above is projected on the upper surface of the main body part,
A retaining wall block, characterized in that a gap formed between the bottom surface of the main body portion of the retaining wall block positioned above and the upper surface of the main body portion of the retaining wall block positioned below can surround the support portion.   2. The retaining wall block according to claim 1, wherein when the retaining wall is formed, adjacent ones in the lateral direction are connected to each other with a space for growing plants or inhabiting aquatic organisms.   An engaging protrusion is provided on the upper part, and an engaging recess for engaging the engaging protrusion is formed on the bottom surface of the main body, the connection is performed by a steel bar, and when the retaining wall is formed, the retaining wall blocks are externally coupled to each other. The retaining wall block according to claim 2, wherein relative displacement without breakage is possible.   The retaining wall block according to claim 3, wherein at least a part of the support portion is the engagement protrusion.   A retaining wall comprising two or more retaining wall blocks according to any one of claims 1 to 4, wherein the retaining wall blocks are connected to each other with an interval between them. Parts.   Using the retaining wall part according to claim 5, at least a part of the retaining wall part positioned above when stacked is disposed so as to straddle between adjacent retaining wall parts positioned below. Retaining wall construction method characterized by that.

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