JP3823075B2 - Retaining wall and retaining wall block - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention prevents collapse of earth and sand on various slopes such as slopes such as cuts or embankments of roads, parks, playgrounds, residential land, etc., and slopes of riversides, lakes, watersides, etc. The present invention relates to a retaining wall and a retaining wall block used therein.
[0002]
[Prior art]
First, as shown in FIG. 13, the applicant of the present application, as shown in FIG. 13, stands the surface plate 52, the holding plate 53 standing up from the surface plate 52, and the connecting plate connecting the surface plate 52 and the holding plate 53. When a retaining wall using the retaining wall block 51 including 54 is proposed (utility model No. 2510846, Japanese Patent No. 2858079), it has been widely used and has been well received. In order to actually construct this retaining wall, a rough granular base material 64 such as crushed stone or chestnut is spread on the groove 62 excavated in the ground 61 immediately in front of the slope 60 and used as a foundation. The bottom retaining wall block 51 is installed thereon, and a space 56 between the surface plate 52 and the holding plate 53 is filled with a coarse granular filler 67 such as crushed stone or chestnut. Subsequently, the retaining wall block 51 in the second and subsequent stages is installed, and the coarse granular filler 67 is similarly filled.
[0003]
The retaining wall constructed in this manner prevents the retaining wall block 51 from moving and maintains the shape and strength of the retaining wall by the coarse granular foundation 64 and the relatively lower and upper coarse granular fillers 67 meshing with each other. Playing a role.
[0004]
[Problems to be solved by the invention]
However, if an unforeseen situation (heavy rain, spring water, flash flood, etc.) occurs, the coarse granular base material 64 that constitutes the foundation moves and the foundation is displaced, and in some cases, the coarse granular basic material 64 may flow out. There is sex. For this reason, when the displacement and outflow are chained upward and the granular filler 67 filled in the space 56 of the retaining wall block 51 moves in the vertical direction (particularly in the downward direction), the retaining wall weakens, There was a possibility that the stabilizing ability of the surface 60 might be lowered.
[0005]
Accordingly, a first object of the present invention is to prevent the displacement of the foundation and the outflow of the coarse granular foundation material, to prevent the retaining wall from weakening, and to maintain the slope stabilization ability. The second object of the present invention is to suppress and stabilize the movement of the filler in the retaining wall block, prevent weakening of the retaining wall, and maintain the slope stabilizing ability.
[0006]
[Means for Solving the Problems]
  The retaining wall according to the present invention connects an upstanding surface plate, a holding plate that stands up away from the surface plate, a middle portion in the left-right direction of the surface plate, and a middle portion in the left-right direction of the holding plate.A pair ofRetaining wall block including connecting plate between surface plate and holding plateA central space between a pair of connecting plates and lateral recesses on the outside of each connecting plateInCoarse grainIn the retaining wall constructed by filling the filling material (filling material) and arranging them in the left and right and stacking up and down in a plurality of stages, the following means (1), (2) or (3) is adopted. Yes.
[0007]
(1) Coarse granular foundation material under the retaining wall block at the bottomIt has a mesh unit that is smaller than the average particle size of the coarse granular base material and that a part of the coarse granular basic material can protrude.Establish a foundation that is surrounded by a geogrid,
  Retaining wall characterized in that, through the geogrid, the coarse granular base material of the foundation and the coarse granular filler filled in the central space and the side recess of the lowermost retaining wall block mesh with each other. .
[0008]
(2) Filler isCentral cavity and side recessStabilizing member that stabilizes by suppressing the vertical movementAs a geogrid having a mesh unit smaller than the average particle size of the coarse granular base material and having a size capable of projecting a part of the coarse granular basic material, the height of the lower end of the central cavity and the side recess is increased. To be at the levelIt is related to at least one of the surface plate, the holding plate and the connecting plateStopProvided,
  A retaining wall characterized in that the coarse granular base material above the geogrid and the coarse granular filler material below the geogrid mesh with each other through the geogrid.
[0009]
(3) Coarse granular foundation material under the bottom retaining wall blockIt has a mesh unit that is smaller than the average particle size of the coarse granular base material and that a part of the coarse granular basic material can protrude.Establish a foundation that is surrounded by a geogrid,
  Through the geogrid, the coarse granular base material of the foundation and the coarse granular filler filled in the central space and the side recess of the lowermost retaining wall block were engaged with each other.With
  Filler isCentral cavity and side recessStabilizing member that stabilizes by suppressing the vertical movementAs a geogrid having a mesh unit smaller than the average particle size of the coarse granular base material and having a size capable of projecting a part of the coarse granular basic material, the height of the lower end of the central cavity and the side recess is increased. To be at the levelIt is related to at least one of the surface plate, the holding plate and the connecting plate.StopProvided,
  A retaining wall characterized in that the coarse granular base material above the geogrid and the coarse granular filler material below the geogrid mesh with each other through the geogrid.
[0010]
  The retaining wall block according to the present invention is:
(4) Connect the standing surface plate, the holding plate that stands up away from the surface plate, and the middle portion of the surface plate in the left-right direction and the middle portion of the holding plate in the left-right direction.A pair ofWith a connecting plateA central space between the pair of connecting plates between the surface plate and the holding plate and a side recess on the outer side of each connecting plate;Retaining wall block including
  Central cavity and side recessFilled inCoarse grainStabilizing member that suppresses and stabilizes the movement of the filler in the vertical directionAs a geogrid having a mesh unit smaller than the average particle size of the coarse granular base material and having a size capable of projecting a part of the coarse granular basic material, the height of the lower end of the central cavity and the side recess is increased. To be at the levelIt is related to at least one of the surface plate, the holding plate and the connecting plateStopProvided,
  Through the geogrid, the coarse granular base material above the geogrid and the coarse granular filler material below the geogrid mesh with each other.It is characterized by that.
[0011]
In the above means (1) or (3), the “coarse granular base material” is not particularly limited, but examples thereof include crushed stone, chestnut stone, and concrete glass. As the concrete glass, waste concrete generated in other places or old concrete retaining walls on site can be used, which is useful for waste reuse and environmental protection.
[0012]
The mesh of “Geogrid” is not particularly limited, but is smaller than the average particle diameter of the coarse granular base material and a part of the coarse granular base material (here, means a part of one coarse granular basic material unit). It is preferable to have a mesh unit of a size that can project. Although the material of a geogrid is not specifically limited, A high density polyethylene resin, a polypropylene resin, etc. can be illustrated. The winding ends of the geogrid may or may not be joined, but are preferably joined. Geogrid uses a number corresponding to the length of the foundation.
[0013]
In the above means (1) to (4), the “filler” is not particularly limited, but is preferably one having a large unit volume weight and not easily affected by water, such as crushed stone, chestnut stone, concrete glass, coarse granular iron, etc. Examples thereof include coarse granular fillers, and powder fillers such as soil, crusher run, and powdered ore. When a coarse granular filler is used, it may be the same as or different from the basic coarse granular base material.
[0014]
When the filler is a coarse granular filler, it is sufficient to provide a stabilizing member in the retaining wall block of one or more stages and half or less of the plurality of stages. If economical efficiency is not ask | required, you may provide a stabilization member in the block for retaining walls of half or more and all the stages.
[0015]
When the filler is a powdery filler, it is preferable to provide the stabilizing member in the retaining wall block that is at least half of the plurality of stages and not more than all stages. However, the present invention can also be implemented by providing a stabilizing member in the retaining wall block having one or more steps and half or less steps.
[0016]
The position of the stabilizing member in the space between the face plate and the holding plate is not particularly limited, but the filler filled in the space in the lower retaining wall block and the space in the upper retaining wall block In order to prevent the relative movement of both retaining wall blocks by meshing with the filled material, it is preferable to be located at a height level excluding the lower end of the void, and the height excluding the lower end and the upper end of the void. More preferably, it is located at a height level, and most preferably at a substantially central height level of the void. Here, the “height level excluding the lower end (and upper end) of the void” means that the lower end of the void 30 mm (and so that coarse granular filler may exist in the void below (and above) the stabilizing member. It is preferable that the height level is excluding the upper end 30 mm).
[0017]
Although it does not specifically limit as a stabilization member, A plate-shaped, perforated plate shape, or a net-like member can be illustrated. In addition, for example, when a pair of connecting plates are provided in parallel on the left and right sides, a plane rectangular space surrounded by the surface plate, the holding plate, and the pair of connecting plates is approximately the height in the middle. Examples of the planar square plate, perforated plate, or net member that can be closed or mostly closed can be given. Although it does not specifically limit as a material of a stabilization member, Concrete, metal (steel, aluminum alloy, etc.), synthetic resin (high density polyethylene resin, polypropylene resin, etc.), ceramic, wood, etc. can be illustrated. The thickness of the stabilizing member is not particularly limited, and the preferred thickness varies depending on the material. For example, in the case of concrete, 50 to 120 mm is preferable.
[0018]
Regardless of the above description regarding the position of the stabilizing member, when the stabilizing member is the net-like member, it is also preferable to provide the stabilizing member so as to be positioned at the height level of the lower end of the void. In other words, the stabilizing member is a net-like member that is locked or integrally formed on at least one lower end surface of the surface plate, the holding plate, and the connecting plate. In this case, the mesh of the net-like member is not particularly limited, but is smaller than the average particle size of the coarse granular base material and a part of the coarse granular base material (here, means a part of one coarse granular basic material unit). .) Has a mesh unit of a size that can be projected, and the geogrid is preferable as a specific product.
[0019]
The stabilizing member may or may not be provided between two retaining wall blocks adjacent to the left and right, or a stabilizing member that does not apply and such a stabilizing member may be provided side by side. .
[0020]
When the stabilizing member is “locked” to at least one of the face plate, the holding plate, or the connecting plate, the locking means is not particularly limited, but it can be latched or fastened by a fastener, the face plate, the holding plate. Examples include engagement or fitting with convex portions or concave portions provided on the plate or the connecting plate, and latching of the extension portion of the stabilizing member with respect to the upper end of the retaining plate or the connecting plate. Although it does not specifically limit as a fastener, An L-shaped angle, a volt | bolt, etc. can be illustrated.
[0021]
In the case where the stabilizing member is “integrally formed” with at least one of the surface plate, the holding plate, and the connecting plate, the integral forming means is not particularly limited, and an integral precast with concrete can be exemplified.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
[First embodiment]
In the first embodiment of the present invention shown in FIGS. 1 to 4, while the retaining wall block 1 is filled with the coarse granular filler 17 in the space 6 between the surface plate 2 and the holding plate 3, In the retaining wall constructed by stacking up and down and stacked in multiple stages, a foundation 13 is provided in which a coarse granular base material 14 is surrounded by a geogrid 15 below the lowermost retaining wall block 1. . In the present example, the dimensions of the following parts are examples and can be changed as appropriate.
[0023]
As shown in FIG. 3A, the retaining wall block 1 used in the present embodiment includes an upstanding surface plate 2, a holding plate 3 standing up away from the surface plate 2, and a surface plate 2. A pair of connecting plates 4, 4 that connect the middle portion in the left-right direction and the middle portion in the left-right direction of the retaining plate 3 are integrally precast with concrete.
[0024]
The surface plate 2 is a rectangular plate having a width of about 2000 mm, a height of about 1000 mm, and a thickness of about 120 mm. The surface plate is provided with a pattern such as a stone wall pattern or a groove pattern on the upper and lower sides of the left and right side end surfaces. Has a shallow recess 5 for forming a drain slit. The holding plate 3 is a rectangular plate having a width of about 1860 mm, a height of about 500 mm, and a thickness of about 120 mm. Each of the pair of connecting plates 4 and 4 has a front and rear length of about 1000 mm and a height of about 500 mm (however, only the front portion coupled to the surface plate 2 is a reinforcing portion 4a and 4a having an increased height of about 900 mm). A plate having a thickness of about 100 mm. The weight of the retaining wall block 1 is about 1300 kg.
[0025]
Since the lower end surfaces of the holding plate 3 and the connecting plates 4 and 4 are adjusted to the same level as the lower end surface of the surface plate 2, the holding plate 3 and the connecting plates 4 and 4 (except for the reinforcing portions 4a and 4a) Each upper end surface is at a height level of about ½ with respect to the upper end surface of the surface plate 2. The connecting plates 4 and 4 face each other in parallel at an interval of about 1000 mm on the left and right, and the center position, the center position in the left and right direction of the surface plate 2, and the center position in the left and right direction of the holding plate 3 are It is adapted to. Therefore, with respect to the outer surface of each connecting plate 4, 4, the surface plate 2 protrudes by about 400 mm to the closer side end surface (protruding portion 2 a), and the holding plate 3 protrudes by about 330 mm to the closer side end surface. (Protruding part 3a).
[0026]
In the case of this embodiment, the space 6 between the surface plate 2 and the retaining plate 3 is a plane quadrangle (in this example, approximately square) surrounded by the surface plate 2, the retaining plate 3, and the pair of connecting plates 4 and 4. ) In the central space 7 and outside the connecting plates 4 and 4, surrounded by the protruding portion 2 a of the surface plate 2, the protruding portion 3 a of the holding plate 3, and the connecting plates 4 and 4. Side recess 8. The retaining wall block 1 having such a central space 7 is said to be a box-type (or container-type or bottle-type) retaining wall block.
[0027]
In the retaining wall of the present embodiment, a groove 12 having an opening front and rear width of 1500 to 2000 mm, a bottom front and rear width of 1000 to 1500 mm, and a depth of 200 to 500 mm is excavated in the field ground 11 immediately in front of the slope 10. Inside, a foundation 13 is provided in which a coarse granular foundation 14 is surrounded by a geogrid 15. For example, single grain crushed stone (S-40 or more) is used for the coarse granular base material 14. As shown in FIG. 4B, the geogrid 15 is made of, for example, a high-density polyethylene resin and is smaller than the average particle diameter of the coarse granular base material 14 and a size that allows a part of the coarse granular basic material 14 to protrude. Those having a mesh unit of are used. As shown in FIG. 4 (a), the foundation 13 is constructed by excavating and compacting the groove 12, and laying the geogrid 15 in the groove 12 so that both ends of the geogrid 12 remain before and after the groove 12. After placing the coarse granular base material 14 on 15, both ends of the remaining geogrid 15 are wound on the coarse granular basic material 14 to form winding ends, and the winding ends are joined by a fastening member, heat welding, or the like. It is done by doing.
[0028]
On this foundation 13, a plurality of retaining wall blocks 1 constituting the lowermost stage (first stage) are installed side by side. A slit is formed between the shallow concave portions 5 of the adjacent retaining wall blocks 1 so that excessive water stored in the retaining wall can be drawn to the front side. As shown in FIG. 3 (b), one of the adjacent retaining wall blocks 1 is installed upside down and installed at the rounded corners and corners where the convexity toward the front side is particularly steep. 3 do not hit the right and left (and thus the formation of the rounded portion and the corner portion is not hindered), and instead, the adjacent holding plates 3 and the connecting plates 4 are in relation to the upper end surface of the surface plate 2 as described above. Because of the height level of about ½, they hit each other vertically.
[0029]
In the space 6 between the surface plate 2 and the holding plate 3 (the central space 7 and the side recess 8 as described above) and the space 16 between the holding plate 3 and the slope 10, a coarse granular filler 17 is provided. Filled and compacted. Further, the coarse granular filler 17 is filled and compacted to the same level as the upper end surface of the surface plate 2 beyond the upper ends of the void 6 and the space 16.
[0030]
A plurality of retaining wall blocks 1 constituting the second stage are installed on the lowermost coarse granular filler 17 in the same manner as the lowermost stage, and the coarse granular filler 17 is filled therewith. Further, when there is a third or subsequent stage, the installation of the retaining wall block 1 and the filling of the coarse granular filler 17 are similarly repeated. In most cases, this type of retaining wall is an inclined wall (including a temple slope), so that the upper retaining wall block is relatively higher than the surface plate 2 of the lower retaining wall block 1. The surface plate 2 of 1 is installed so that it may be located back. Of course, in the case of a vertical wall, the upper and lower surface plates 2 are flush with each other.
[0031]
According to the retaining wall of the present embodiment configured as described above, the following operational effects (1) and (2) are obtained.
(1) Prevent displacement and outflow of foundation 13
As shown in FIG. 4B, since the geogrid 15 has a mesh unit smaller than the average particle diameter of the coarse granular base material 14, the surrounding coarse granular base material 14 is unlikely to spill out of the mesh. Even if an unexpected situation (spring water, heavy rain, flash flood, etc.) occurs, the movement of the coarse granular base material 14 surrounded by the geogrid 15 is restrained. 14 can be prevented from flowing out. For this reason, the displacement and outflow are linked upward, and the coarse granular filler 17 filled in the space 6 of the retaining wall block 1 moves in the vertical direction (particularly in the downward direction), and the retaining wall is weakened. Can be prevented, and the ability to stabilize the slope can be maintained. Moreover, since the displacement of the foundation 13 is prevented in this way, construction is possible even if the site ground 11 has a soft portion, and the slope 10 can be stabilized.
[0032]
(2) Engagement between coarse granular base material 14 and coarse granular filler material 17 through geogrid 15 is possible.
As shown in FIG. 4B, since the geogrid 15 has a mesh unit of a size that allows a part of the coarse granular base material 14 to protrude, a part of the coarse granular base material 14 protrudes from the geogrid 15. Thus, the coarse granular filler 17 filled in the space 6 of the lowest retaining wall block 1 may be engaged, or the coarse granular filler 17 may protrude from the geogrid 15 and be engaged with the coarse granular base material 14. it can. For this reason, similarly to the case where the geogrid 15 is not provided, it is possible to prevent the base 13 and the lowermost retaining wall block 1 from slipping during normal times.
[0033]
[Second Embodiment]
In the second embodiment of the present invention shown in FIGS. 5 to 7, the coarse granular filler 17 (which may be a powdery filler as will be described later) moves up and down the space 6 between the surface plate 2 and the holding plate 3. Only in that the stabilizing members 21 and 22 that suppress and stabilize the movement in the direction are locked or integrally formed with at least one of the surface plate 2, the holding plate 3 or the connecting plates 4 and 4, This is different from the first embodiment. The dimension of each part given in this example is also an example, and can be changed as appropriate.
[0034]
In the present embodiment, a retaining wall block 100 is used which is obtained by adding stabilizing members 21 and 22 to the retaining wall block 1 of the first embodiment at the bottom, and the same as in the first embodiment after the second stage. Retaining wall block 1 is used. However, the retaining wall block 100 is not limited to the lowermost stage, and is used only for the stage below the central stage as viewed from the entire retaining wall (for example, only the lowermost stage and the second stage, or only the second stage). Also good.
[0035]
In the retaining wall block 100, the stabilizing member 21 has a lateral width of about 1000 mm, a front and rear length of about 1000 mm, and a thickness that can substantially close the central space 7 of the plane quadrangle at a height level excluding its lower and upper ends. It is a square plate with a length of about 80 mm. Further, the stabilizing member 22 is placed between two retaining wall blocks 100, 100 adjacent to each other on the left and right sides, and the planar U-shaped side recess 8 is positioned at a height level excluding its lower end and upper end. It is a quadrangular plate having a lateral width of approximately 800 mm, a longitudinal length of approximately 1000 mm, and a thickness of approximately 80 mm that can be substantially closed. The stabilizing members 21 and 22 are formed with water permeable holes 27 having an appropriate size and number so that rainwater, spring water, and the like do not accumulate on the stabilizing members 21 and 22.
[0036]
The stabilizing members 21 and 22 are steel L-shapes firmly attached to the plates 2, 3 and 4 by anchors 24 whose base ends are embedded in the surface plate 2, the holding plate 3 and the connecting plates 4 and 4, respectively. A peripheral portion is placed on the angle member 23 and is attached so as not to move up and down by a bolt (not shown). This placement and attachment is preferably performed on site as described later.
[0037]
The positions of the stabilizing members 21 and 22 are the height levels excluding the lower end and the upper end of the space 6 as described above, and even near the upper end as shown in FIG. The central height level may be close to the lower end as shown in (c), but it is preferable to exclude the lower end 50 mm (and the upper end 50 mm) of the void. In addition, as shown in (d), although it cannot be located in the lower end and upper end of the space 6, the block 1 for retaining walls becomes easy to shift | deviate so that it may mention later.
[0038]
In the retaining wall of the present embodiment, a plurality of retaining wall blocks 100 are installed side by side at the bottom (first stage), and in the rounded and corner portions where the convex toward the front side is particularly steep, As in the embodiment, it is installed upside down. The space 6 (as described above, the central space 7 and the side recess 8) and the space 16 between the retaining plate 3 and the slope 10 are filled with a coarse granular filler 17 and compacted. The coarse granular filler 17 is filled and compacted to the same level as the upper end surface of the surface plate 2 beyond the upper ends of the voids 6 and the spaces 16.
[0039]
This filling is
(1) First, the retaining wall block 100 in a state where the stabilizing members 21 and 22 are not attached is installed, and the lower surface level of the stabilizing members 21 and 22 in the central cavity 7 and the side recess 8 is reached. After filling with coarse granular filler 17 and compacting,
(2) Place the peripheral edge of the stabilizing members 21 and 22 on the L-shaped angle member 23 and attach it with bolts (not shown). ),
(3) Subsequently, the coarse granular filler 17 is filled above the stabilizing members 21 and 22 and compacted.
[0040]
Since the other structure of the retaining wall of this embodiment is the same as that of 1st embodiment, the description in 1st embodiment is used.
[0041]
According to the retaining wall of the present embodiment configured as described above, the following operational effects (3) and (4) are obtained in addition to the operational effects (1) and (2) of the first embodiment.
[0042]
(3) Prevention of movement / outflow of coarse granular filler 17
As described in the above effect (1), the geogrid 15 restrains the movement of the coarse granular base material 14 to prevent the displacement of the basic 13 and the outflow of the coarse granular base material 14. However, it cannot be said that there is no risk of an unexpected situation (spring water, heavy rain, flash flood, etc.) in which the foundation 13 is displaced. Even in such a case, the stabilizing members 21 and 22 stabilize the coarse granular filler 17 in the empty space 6 (7, 8) by suppressing the movement in the vertical direction, so that the displacement of the foundation 13 is the lowest and It is not linked to the movement of the coarse granular filler 17 in the upper stage, so that the weakening of the retaining wall can be prevented, and the stabilizing ability of the slope 10 can be maintained.
[0043]
(4) Prevention of slippage of retaining wall block 1
Since the stabilizing members 21 and 22 are located at a height level excluding the lower end and the upper end of the space 6 (7, 8), the coarse granular filler 17 is formed at the lower end and the upper end of the space 6 (7, 8). Can get in. For this reason, the coarse granular filler 17 filled in the space 6 of the relatively lower retaining wall block 1 or 100 and the coarse granular filler 17 filled in the relatively empty space 6 of the upper retaining wall block 1 It is possible to prevent relative movement (displacement) of both retaining wall blocks by meshing with the material 17.
As shown in FIG. 7D, when the stabilizing members 21 and 22 are positioned at the lower end and the upper end of the space 6, the stabilizing members 21 and 22 and the coarse granular filler 17 at the upper stage or the lower stage. The retaining wall block 1 is likely to be slipped.
[0044]
In addition, in this embodiment, it can also install using the block 100 for retaining walls which provided the stabilizing members 21 and 22 not only in the lowest level (1st level) but in the some level (for example, every other level). Instead of the coarse granular filler 17, the use of the retaining wall block 100 is increased (preferably half or more are preferable), for example, the retaining wall block 100 is used in all stages as shown in FIG. It is also possible to use a powder filler 18 such as.
[0045]
[Third embodiment]
In the third embodiment of the present invention shown in FIGS. 9 to 11, the powdery filler 18 (which may be a coarse granular filler as will be described later) moves up and down the space 6 between the surface plate 2 and the holding plate 3. Only in that the stabilizing member 31 that suppresses and stabilizes movement in the direction is locked or integrally formed on at least one lower end surface of the surface plate 2, the holding plate 3, or the connecting plates 4 and 4, This is different from the first embodiment. The dimension of each part given in this example is also an example, and can be changed as appropriate.
[0046]
In this embodiment, the same retaining wall block 1 as in the first embodiment is used at the bottom, and a retaining wall 31 is added to the retaining wall block 1 of the first embodiment after the second stage. The block 101 for use is used. However, the retaining wall block 101 may also be used in the lowermost stage.
[0047]
In the retaining wall block 101, the stabilizing member 31 is made of, for example, a high-density polyethylene resin similar to the geogrid 15 of the first embodiment, and is smaller than the average particle diameter of the coarse granular base material 14 and coarse granular basic material. A geogrid having a mesh unit of a size that can project a part of 14 is used. This stabilizing member 31 has a lateral width of about 1200 mm and a longitudinal length of about 1240 mm, which can close (cover) the central cavity 7 and the side recesses 8 on both sides at the height level of the lower end in a mesh shape. It is a geogrid cut out to a square. The stabilizing member 31 has one end of the left and right ends protruding about 200 mm beyond the end of the surface plate 2 (the protruding portion 31a), and the lower end surfaces of the surface plate 2, the holding plate 3, and the connecting plates 4 and 4. It is locked by bending the tip of the anchor 32 embedded in the base plate in each of the plates 2, 3, 4 through the mesh of the geogrid.
[0048]
The retaining wall of the present embodiment has the same structure as that of the first embodiment except that the retaining wall block 101 provided with the stabilizing member 31 is used as the block and the powder filler 18 such as soil is used as the filler. Since it is the same as a form, the remainder uses the description in 1st embodiment. When the retaining wall blocks 101 are installed side by side as described above, the stabilizing member 31 of the adjacent retaining wall block 101 overlaps the protruding portion 31a of the stabilizing member 31 as described above, and the overlapping mesh is formed. Since the powdery filler 18 enters, there is an effect of connecting adjacent retaining wall blocks 101 to each other.
[0049]
According to the retaining wall of the present embodiment configured as described above, the following operational effect (5) is obtained in addition to the operational effects (1) and (2) of the first embodiment.
[0050]
(5) Suppression of movement / outflow of powder filler 18
As described in the above effect (3), even when an unexpected situation (spring water, heavy rain, flash flood, etc.) occurs, the stabilizing member 31 is a powder filler in the space 6 (7, 8). 18 is restrained to stabilize the movement in the vertical direction, so that the displacement of the foundation 13 is not linked to the movement of the powder filler 18 in the lowermost stage and the upper stage, and the weakening of the retaining wall can be prevented, Therefore, the stabilizing ability of the slope 10 can be maintained.
[0051]
  In this embodiment, the coarse granular filler 17 can be used instead of the powder filler 18. Also in this case, the upper and lower stages of coarse particlesFillerA part of 17 can protrude from the mesh-like stabilizing member 31 and mesh with each other. For this reason, similarly to the case where the stabilizing member 31 is not provided, it is possible to prevent the retaining wall block of each step from slipping.
[0052]
Note that 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 present invention.
(1) In the first embodiment and the second embodiment, by laying a geogrid under the retaining wall block at each stage, the filler can be further restrained to enhance the stability of the retaining wall. .
[0053]
(2) As shown in FIG. 12 (a), the stabilizing member 21 (same for 22) is formed of a metal plate, and the extended portion 21a from the collar is hung on the upper end of the connecting plate 4 or the holding plate 3. Stop and attach. Moreover, as shown in FIG.12 (b), the stabilization member 21 (22 is also the same) is made into the plate shape with the hole 21b, and is precast integrally with the surface plate 2, the holding plate 3, and the connecting plates 4 and 4. Thus, by providing the hole 21b having the minimum area, the coarse granular filler 17 can be filled downward from the hole 21b during the filling.
[0054]
(3) In 2nd embodiment and 3rd embodiment, it can also be set as the aspect of only the coarse granular base material 14 which does not use the geogrid 15 as the foundation 13. FIG. In the third embodiment in that case, the retaining wall block 101 provided with the stabilizing member 31 at the lowest stage is used.
[0055]
【The invention's effect】
As described above in detail, according to the retaining wall and retaining wall block according to the present invention, even when an unexpected situation (heavy rain, spring water, flash flood, etc.) occurs, the retaining wall is prevented from being weakened. There is an excellent effect that the stabilization ability can be maintained.
[Brief description of the drawings]
FIG. 1 is a perspective view of a retaining wall according to a first embodiment of the present invention.
FIG. 2 is a sectional view of the retaining wall.
FIG. 3 is a perspective view of a retaining wall block used for the retaining wall.
4A is a schematic sectional view showing a construction method, and FIG. 4B is a partially enlarged perspective view of the upper surface of the foundation.
FIG. 5 is a cross-sectional view of a retaining wall according to a second embodiment of the present invention.
FIG. 6 is a perspective view of a retaining wall block used for the retaining wall.
FIG. 7 is a cross-sectional view showing variations in the position of the stabilizing member in the retaining wall block.
FIG. 8 is a perspective view showing a modified example of the retaining wall.
FIG. 9 is a sectional view of a retaining wall according to a third embodiment of the present invention.
FIG. 10 is a perspective view of a retaining wall block used for the retaining wall.
11A is a cross-sectional view of the retaining wall block, and FIG. 11B is a front view of the retaining wall blocks arranged side by side.
FIG. 12 is a perspective view showing a modified example of the retaining wall block.
FIG. 13 is a cross-sectional view of a retaining wall according to a conventional example.
[Explanation of symbols]
1 Retaining wall block
2 Surface plate
3 holding plate
4 Connecting board
6 voids
7 Central space
8 Side recess
13 Basics
14 Coarse granular material
15 Geogrid
17 Coarse granular filler
21 Stabilizing member
22 Stabilizing member
31 Stabilizing member
100 Retaining wall block
101 Retaining wall block

Claims (6)

A holding plate that includes an upstanding surface plate, a holding plate that stands up away from the surface plate, and a pair of connecting plates that connect a middle portion in the left-right direction of the surface plate and a middle portion in the left-right direction of the holding plate. The wall blocks are arranged side by side while filling the center space between the pair of connecting plates between the surface plate and the holding plate and the side recesses on the outer side of the connecting plates with the coarse granular filler. In the retaining wall that is built up and down in multiple stages,
A geogrid having a mesh unit with a coarse granular base material smaller than the average particle diameter of the coarse granular base material and a part of the coarse granular basic material can protrude below the retaining wall block at the lowest level. Establish a foundation surrounded by
Retaining wall characterized in that, through the geogrid, the coarse granular base material of the foundation and the coarse granular filler filled in the central space and the side recess of the lowermost retaining wall block mesh with each other. . A holding plate that includes an upstanding surface plate, a holding plate that stands up away from the surface plate, and a pair of connecting plates that connect a middle portion in the left-right direction of the surface plate and a middle portion in the left-right direction of the holding plate. The wall blocks are arranged side by side while filling the center space between the pair of connecting plates between the surface plate and the holding plate and the side recesses on the outer side of the connecting plates with the coarse granular filler. In the retaining wall that is built up and down in multiple stages,
As a stabilizing member that suppresses and stabilizes movement of the filler in the central cavity and the side recess in the vertical direction, the stabilizer is smaller than the average particle diameter of the coarse granular base material and At least one of the face plate, the holding plate, and the connecting plate is located at a height level at the lower end of the central cavity and the side recess, with a geogrid having a mesh unit that is partially projectable. Locked to one,
A retaining wall characterized in that the coarse granular base material above the geogrid and the coarse granular filler material below the geogrid mesh with each other through the geogrid. A holding plate that includes an upstanding surface plate, a holding plate that stands up away from the surface plate, and a pair of connecting plates that connect a middle portion in the left-right direction of the surface plate and a middle portion in the left-right direction of the holding plate. The wall blocks are arranged side by side while filling the center space between the pair of connecting plates between the surface plate and the holding plate and the side recesses on the outer side of the connecting plates with the coarse granular filler. In the retaining wall that is built up and down in multiple stages,
A geogrid having a mesh unit with a coarse granular base material smaller than the average particle diameter of the coarse granular base material and a part of the coarse granular basic material can protrude below the retaining wall block at the lowest level. Establish a foundation surrounded by
Through the geogrid, the coarse granular base material of the foundation and the coarse granular filler filled in the central space and the side recess of the lowermost retaining wall block are engaged ,
As a stabilizing member that suppresses and stabilizes movement of the filler in the central cavity and the side recess in the vertical direction, the stabilizer is smaller than the average particle diameter of the coarse granular base material and At least one of the face plate, the holding plate, and the connecting plate is located at a height level at the lower end of the central cavity and the side recess, with a geogrid having a mesh unit that is partially projectable. Locked to one,
A retaining wall characterized in that the coarse granular base material above the geogrid and the coarse granular filler material below the geogrid mesh with each other through the geogrid. A standing surface plate, a copy plate standing apart from said surface plate to the back, and a pair of connecting plates connecting the lateral direction middle portions of the right and left direction middle portion and該控plate of the surface plate, the table In the retaining wall block including the central space between the pair of connecting plates between the face plate and the holding plate and the side recesses on the outer side of each connecting plate ,
As a stabilizing member that suppresses and stabilizes the coarse granular filler filled in the central cavity and the side recess in the vertical direction, the stabilizer is smaller than the average particle diameter of the coarse granular base material and the coarse granular filler A geogrid having a mesh unit of a size that allows a part of the granular base material to protrude is positioned at the height level of the lower end of the central space and the side recess, and the surface plate, the holding plate, and the connecting plate Locked to at least one of the plates,
A retaining wall block characterized in that a coarse granular base material above the geogrid and a coarse granular filler material below the geogrid mesh with each other through the geogrid. The retaining wall according to claim 2 or 3, wherein the geogrid is provided such that one of left and right ends thereof protrudes beyond an end of the surface plate . The retaining wall block according to claim 4, wherein the geogrid is provided such that one of left and right ends protrudes beyond an end of the surface plate.

Images