JPH0611979B2 - Earth retaining method using blocks - Google Patents

Description

TECHNICAL FIELD The present invention relates to a construction method for preventing soil from flowing out from a block piled up as a retaining wall such as a river or Mizube.

[Conventional technology]

Conventionally, as a retaining wall for rivers and water, blocks that have vertical pits and grooves or holes (12) in the part facing rivers
It is known that a large number of (1) are stacked vertically and horizontally as shown in FIG. 7 and the soil (2) is embedded in the basin of each block (1). As shown in FIG. 7, grass (3) is planted on such a retaining wall, or grass (3) is naturally rooted and made to grow.

[Problems to be solved by the invention]

If such a construction method is adopted, the groove or hole (12) of the block (1) located near the normal water level L due to the water flow of the river, etc.
From this, the soil (2) in the basin flows out as shown in FIG. If the soil (2) in the basin drains, the grass (3) will die, and the retaining wall that does not contain the soil (2) will lose stability and lose its function. In addition, sand has a high water absorption capacity and does not dissolve in water more than soil, and although there are few problems of outflow,
There is a drawback that earth pressure from above discharges from the groove or hole (12). The present invention aims to overcome these drawbacks.

[Means for solving problems]

In order to achieve this object, in the present invention, the front plate (15),
Front plate (15) of the block, which has a back plate (17) and earth and sand holes (11) surrounded by both side plates (16) in the vertical direction.
Is a block (1) in which a groove or hole (12) is formed in a part of each of the blocks having the same shape.
When forming a retaining wall for rivers, etc. by vertically and horizontally weighting so that they communicate with each other vertically, a fibrous suction preventive material is provided on the back surface (18) of the front plate (15) of the block located at least below the water surface.
(4) is attached, the groove or hole (12) is closed, and then the sand (5) is compacted in each earth and sand hole, and then the block (1) is similarly weighted and these earth and sand holes (11) are It is characterized by embedding soil (2).

[Action]

In this way, the fibrous suction preventive material (4) is attached to the front plate.
The sand (5) in the earth and sand holes (5) is effectively retained by the back surface (18) of (15) and is located at least under the surface of the water through the groove or hole (12) in the block
The outflow of water is blocked by this suction preventive material. As a result, the soil buried above this will not run out. On the other hand, water that has flowed in from the groove or hole (12) is a suction preventive material (4).
Soaks into the sand (5) through the water, and its moisture reaches the soil (5) by a kind of capillary phenomenon.

〔Example〕

 Embodiments of the present invention will be described with reference to the accompanying drawings.

The block (1) used here is, as shown in FIGS. 5 and 6, a front plate (15), a rear plate (17), and side plates (16) on both sides.
Is composed of a substantially rectangular frame, and the earth and sand hole (11) penetrating in the vertical direction is formed in the central portion thereof. Further, the front plate (15) facing the river or the like has a groove (12) in which the rooted grass (3) grows. The opening may be replaced by a hole instead of the groove (12), but the size of the opening is not limited to the front plate (15).
Is smaller than the total area, and a space for attaching a later-described suction preventive plate is left.

To form a retaining wall for a river (R) using this block (1), first, as shown in Fig. 1, foundation stones (6), foundation works (7),
The foundation work of the concrete with back lining (8) is done, and the blocks (1) are lined up in a line on the foundation work (7) and fixed to each other and piled up in 2 to 5 steps. At that time, the river side of each block (1) located near the water surface and below it, that is, the fibrous suction preventive material (4) is attached to the back surface (18) of the front plate (15), and the groove ( Cover 12) from the inside. Next, the sand (2) is compacted in the earth and sand holes (11) of each block (1). At this time, the sand does not harden like soil, so it is easy to be discharged from the groove (12) by the compaction force of the lower part, but the fibrous suction preventive material (4)
Effectively prevent the discharge of sand.

After this work, return to the conventional construction and stack the blocks (1) to the top and fix them. And each block
The work is completed by embedding the soil (2) in the earth and sand hole (11) of (1).

In this case, each block (1) may be sequentially stacked as the groove (12) becomes a zigzag shape as shown in FIG. 2, but the piled blocks (1) have few sand holes (11). Blocks that are connected to each other in the up-down direction with alternate blocks, and are near the normal water level L of the river (R) and below the water surface.
The groove (12) of (1) is entirely covered from the inside by the suction preventive agent (4). Therefore, the sand in the sediment hole (11) is
The (5) will not flow out of the ditch (12) and consequently the soil (2) buried above will not flow out. Meanwhile, the groove
The water flowing from (12) penetrates the sand (5) in the earth and sand hole (11) through the suction preventive material (4), and the water reaches the soil (2) by a kind of capillary phenomenon.

The suction preventive material (4) may be any material that allows water to pass through but not sand, and is, for example, a sheet of coconut fiber or nylon raw yarn knitted. In the embodiment, the suction preventive material is attached to the back surface (18) of the front plate (15) of the block (1) near the normal water level L and below the water surface, but only near the groove (12). OK.

On the other hand, this block (1) can also be used outside the retaining wall of the river (R) as a retaining wall on the waterside as shown in FIGS. 3 and 4. The construction method in this case is basically no different from that of rivers. However, in the case of the embodiment, the block (1) is so-called direct stacking type so that the grooves (12) of the block (1) provided with the suction preventive material (4) are in the same row as shown in FIG. ) Are piled up.

Grass (3) is planted on such a retaining wall or grass (3) is naturally rooted and grown, but this is no different from the conventional case.

In addition, on the upper surface and the lower surface of the block (1) in the embodiment,
As shown in FIGS. 5 and 6, the convex portion (13) and the concave portion (14) are formed, and when the blocks (1) are sequentially stacked, the convex portion (1
The concave portion (14) and the concave portion (3) can be fitted into each other. In this way, the stacked blocks (1) do not shift back and forth and left and right.

〔The invention's effect〕

According to the present invention, there is no outflow of earth and sand, and therefore, the retaining wall is stable, and this state can be maintained for a long time. In addition, since sand is compacted in the lower block located at least below the surface of the water, the effect of wicking sand is increased, and water is contained in the soil in a large amount, so even in summer The effect is that the grass does not die even in the hot season.

[Brief description of drawings]

1 to 6 of the accompanying drawings are for explaining the earth retaining method according to the present invention, and FIG. 1 shows the case where the earth retaining method according to the present invention is applied to construction of a retaining wall of a river. Fig. 2 is a vertical side view showing an example, Fig. 2 is a front view showing an example of block allocation in that case, and Fig. 3 is a case where the earth retaining method according to the present invention is applied to the construction of a water retaining wall. Fig. 4 is a vertical side view showing an example, Fig. 4 is a front view showing an example of block allocation in that case, Fig. 5 is a front view of only blocks used in this construction method, and Fig. 6 is VI- of Fig. 5. Fig. 7 is a cross-sectional view taken along line VI, and Fig. 7 is a vertical sectional side view showing an example of construction of a conventional river retaining wall. (1) …… Block, (11) …… Soil hole, (12) …… Groove or hole (2) …… Soil, (4) …… Suction prevention material, (5) …… Sand.

Claims (1)

[Claims] 1. A front plate (15), a back plate (17), and both side plates.
It has earth and sand holes (11) surrounded by (16) that penetrate vertically.
In addition, it is a block (1) in which a groove or hole (12) is formed in a part of the front plate (15) of the block, and the blocks of the same shape are connected so that the earth and sand holes (11) communicate vertically. When forming a retaining wall such as a river by weighting a large number of columns vertically and horizontally, the back surface (18) of the front plate (15) of the block located at least below the water surface
Attach the fibrous suction preventive material (4) to the groove or hole (1
2) was closed, and then sand (5) was compacted in each hole, then the block (1) was similarly weighted, and the earth (2) was embedded in these holes (11). A soil retaining method using blocks that is characterized.