JPH10311035A - Reinforcement earth forming method, earth retaining wall and earth retaining wall construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a stable filling by repeating the process where a porous plate type body of a foamed material is overlapped for stacking sediment thereon, another plate type body of a foamed material is superposed following rolling compacting the sediment, sediment is again stacked and rolling compaction is applied to the stuck sediment. SOLUTION: Plate type bodies 3 of expanded styrene having a suitable number of circular holes are arrayed on a subsoil 1, and sediment 4 is stuck on the plate type bodies 3. Subsequently, the stuck sediment 4 is sufficiently rolled compacted. Furthermore, plate type bodies 3 of expanded styrene are again arrayed on the rolled sediment 4 and another sediment 4 is stuck thereon. Thereafter, the stuck sediment 4 is sufficient rolled compacted. In this case, the circular holes of the upper plate type bodies 3 are positioned so as not to be overlapped on the circular holes of the lower plate type bodies, thereby causing the weight of the sediment 4 to act on the lower plate type bodies 3. This work is repeated until a desired height is obtained. Finally, concrete 5 is placed. As a result, the sediment and the foamed material are solidified and integrated with each other as a whole, thereby providing a sturdy body structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced earth method using a foam made of a polymer material such as styrofoam or the like and earth and sand, a retaining wall for retaining earth and a method for constructing the retaining wall.

[0002]

2. Description of the Related Art Conventionally, when embankment is performed on soft ground, sand is mixed or lime is applied to solidify the ground in order to increase the supporting capacity of the base, and embankment is performed by increasing the ground supporting capacity. Alternatively, the bottom width of the embankment is widened to withstand the supporting force. However, the methods of mixing earth and sand, performing lime treatment, and widening the bottom width of the embankment all have disadvantages that the construction cost increases.

Conventionally, when constructing an earth retaining wall with concrete or a block, the earth pressure applied to the retaining wall is calculated, and the thickness and the amount of reinforcing steel that can withstand the back pressure are calculated. The drawback of this construction method was that the construction cost was high.

[0004] Recently, a method has been proposed in which the earth and sand on the retaining wall that causes back earth pressure is replaced with styrofoam.

According to this method, the styrofoam replaced with earth and sand is so light that its weight is negligible. Therefore, if all the earth and sand on the angle of repose is replaced, the earth pressure on the retaining wall can be eliminated and the concrete can be removed. And no reinforcing bars are required.

However, in the above-mentioned method, the cost of the styrene foam itself is high, so that the construction cost is relatively high, and because the styrene foam is light, there are adverse effects such as buoyancy. There is also a risk of leaving.

[0007]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks of the conventional method, and enables the amount of earth and sand to be used and the total weight of the embankment to be adjusted. The purpose of the present invention is to provide a reinforced earth method in which a stable embankment can be constructed even when the road is abrupt, construction costs are low, and workability is good.

Another object of the present invention is to provide a retaining wall and a method for constructing the retaining wall because a stable embankment can be constructed if the slope is steep and nearly vertical and a stable embankment can be constructed. It is assumed that.

[0009]

SUMMARY OF THE INVENTION A reinforced earth method according to the present invention comprises:
After setting a perforated plate-like body formed of a foam made of a polymer material such as styrene foam, stacking earth and sand on the foam-made plate, applying rolling pressure to the earth and sand, and then placing the foam thereon The above object has been achieved by repeating the process of superimposing the plate-shaped bodies, stacking the earth and sand again, and applying compaction to the stacked earth and sand.

The retaining wall and the method of constructing the retaining wall according to the present invention are characterized in that a perforated plate-like block made of foam is joined to the rear of a surface block forming the outer wall surface of the retaining wall, In this way, a stable earth retaining wall and a method for constructing the earth retaining wall were successfully provided by alternately forming layers of earth and sand by packing the earth and sand between them.

In the reinforcing earth method, the retaining wall and the method of constructing the retaining wall of the present invention, the plate-like body or the plate-like block is made to have a perforated shape, and earth and sand are filled in the hole of the plate-like body or the plate-like block. pack. At that time, it is important that the position of the hole in the upper plate or the plate block does not correspond to the position of the hole in the lower plate or the plate block. In this way, the earth and sand surround the front and rear, right and left and top and bottom of the plate or the block, and conversely, the plate and block surround the front and rear and left and right of the earth and sand,
The layer of earth and sand and the layer of foam are sandwiched, the weight of the earth and sand is applied to the lower layer of foam, and the earth and sand are solidified as a whole, and the plate or plate-like block and the earth and sand are separated. Combines and becomes stable. If the holes in the upper plate or plate block correspond to the positions of the holes in the lower plate or block, the weight of the earth and sand filled in the holes will be reduced to the lower foam layer. It does not work, so it is not stable.

In practicing the present invention, it goes without saying that the amount of earth and sand used and the total weight of the embankment or retaining wall are adjusted by adjusting the thickness of the plate or block.

In practicing the present invention, the plate-like body or the plate-like block may be formed of a combination of a plurality of plate-like bodies. In this case, a projection is provided at the rear of the plate located at the front, and a window hole for inserting the projection is provided at the front of the plate located at the rear, so that the front plate and the rear plate have the same shape. The body and the projection are inserted in the window hole so that they overlap and join together, and the thickness of both the non-overlapping part and the overlapping part of the front and rear plate-like bodies is constant. In addition, the rear part of the front plate and the front part of the rear plate may be formed to be thin.

Further, when constructing the earth retaining wall of the present invention, a projection for preventing earth and sand flow may be formed at the rear end of the plate-like block. The protrusion for preventing earth and sand flow may not be formed when the soil to be packed has poor fluidity.

In constructing the retaining wall of the present invention,
Although it is possible to form the surface block with a material other than the foam, it is preferable that the surface block be formed of a foam as in the case of the plate-like block.

The earth retaining wall of the present invention is composed of earth and sand and a foam, has a large cross-sectional area as a whole, and has a body weight that is heavier than foam and lighter than earth and sand. Therefore, when considering a leaning retaining wall, considering the bending moment, the cross-sectional shape with a narrow bottom width, specifically an inverted trapezoidal shape, increases the arm length,
This is advantageous because the amount of floor moat is reduced and the force at the end of the arm length is increased mechanically.

[0017]

According to the present invention, the earth and sand layer and the foam layer are sandwiched, and the earth and sand filled in the holes provided in the foam layer are continuous with the earth and sand layer. For,
Since the earth and sand and the foam are solidified as a whole, they have an extremely strong structure. Of course, there is no escape of the foam,
Therefore, a steep gradient can be established. When the slope becomes steep, there is a general danger of settlement on soft ground,
Since the structure of the present invention is quantitative, there is no danger. In addition, the weight of the embankment and retaining wall can be freely adjusted by adjusting the amount of foam such as styrofoam, etc. Stability can be maintained while freely taking a combination form. And, in the case of construction, floor moat soil of the site material can be used, and the amount of foam used is small, so the construction cost is low, the construction can be mechanized, and the workability is good. And other excellent effects can be expected.

[0018]

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

FIGS. 1 and 2 show an example in which the reinforced earth method of the present invention is applied to embankment construction.

That is, a styrofoam plate-like body 3 having an appropriate number of circular holes 2 perforated is laid on the ground 1, and earth and sand 4 are stacked thereon. Subsequently, rolling pressure is sufficiently applied to the piled earth and sand 4. The styrofoam plate-like bodies 3 are laid again thereon, and the earth and sand 4 are stacked thereon, and the stacked earth and sand 4 is stacked thereon.
Apply sufficient compaction. At this time, the circular holes 2 in the upper plate-shaped body 3
It is necessary to take care that the position does not overlap with the position of the circular hole 2 of the lower plate-like body 3. Thus, the weight of the earth and sand 4 is applied to the lower plate-like body 3. This operation is repeated until the desired height is reached. Finally, the concrete 5 is constructed to construct the embankment.

Next, an embodiment of the earth retaining wall and the method of constructing the earth retaining wall according to the present invention will be described with reference to FIGS.

3 to 5, reference numeral 6 denotes a surface block which is stacked to form the outer wall surface of the retaining wall, and is formed of styrene foam. This surface block 6 is a front wall 6
a and a stay 6b extending at a right angle from the front wall 6a.
A notch 6c with which the upper end of the front wall 6a engages is provided, and an engagement projection 6d with the plate-like block 7 is provided at the rear of the stay 6b.

The plate-like block 7 is made of polystyrene foam. The front part of the plate-like block 7 is
Are connected to and connected to the rear surface of the front wall 6a of the surface block 6, the upper surface of the stay 6b, and the lower surface of the stay 6b of the upper surface block 6 in a state of being engaged with the engaging projection 6d. An appropriate number of earth and sand filling holes 8 are formed in the rear part of the plate-shaped block 7.

When the earth and sand 4 to be used for construction has a high fluidity, a protrusion 9 for preventing earth and sand flow is formed at the rear end of the plate-like block 7.

If necessary, the plate-like block 7 is formed by combining a plurality of plate-like bodies. In this case, as shown in FIGS. 6 to 8, a projection 7b is provided at the rear of the plate 7a located at the front, and a window for inserting the projection 7b at the front of the plate 7c located at the rear. A hole 7d is provided, and the front plate-like body 7 is provided.
a and the rear plate 7c are overlapped and coupled in a state where the projection 7b is inserted into the window hole 7d, and non-overlapping portions of the front and rear plate 7a and 7c are also overlapped. The front plate-like body 7a so that the thickness of the
The rear part and the front part of the rear plate-like body 7c may be formed to be thin.

Next, an example of the construction of the retaining wall by the surface block 6 and the plate-like block 7 will be described.

First, a floor moat is laid on the construction site, and a foundation block 10 for supporting the load of the entire retaining wall is installed. Behind the foundation block 10, a drainage earth pipe 11 is laid, and a rubble stone or gravel 12 is laid. Then, the lowermost surface block 6 is installed on the foundation block 10, and the earth and sand 4 are packed behind the lowermost surface block 6 to perform sufficient rolling. next,
The lowermost plate-like block 7 is fitted to and joined to the lowermost surface block 6. The notch 6c of the second surface block 6 is engaged with the upper end of the front wall 6a of the lowermost surface block 6, and the second surface block 6 is stacked on the lowermost surface block 6. Subsequently, the second surface block 6
Behind the above, the earth and sand 4 are stacked on the lowermost plate-shaped block 7 and sufficient rolling is performed. At this time, the earth and sand 4 are filled into the gap between the plate-like blocks 7 and the earth-and-sand filling hole 8 of the lowermost plate-like block 7 and sufficiently compacted. Then the second
The plate-like block 7 of the step fits and joins the surface block 6 of the second step, and the earth and sand 4 are piled up and compacted. in this way,
The installation of the surface block 6, the stacking and compaction of the earth and sand 4, and the joining of the plate-like block 7 to the surface block 6 are repeated to build up to the top. At this time, the position of the earth and sand filling hole 8 of the upper plate-shaped block 7 does not correspond to the position of the earth and sand filling hole 8 of the lower plate-shaped block 7, so that the weight of the earth and sand 4 is reduced to the lower plate-shaped. It is important to go to block 7. During this time, a water permeable sheet 13 made of a non-woven fabric or the like is applied to a contact portion with the back soil, and a backfill portion 14 is formed.
Perform backfilling while performing sufficient rolling while adjusting to the construction block height. Finally, the floor slab concrete 15 is cast at the uppermost part.

In the case of using a plate-like block 7 composed of a combination of a plurality of plate-like bodies at the time of construction, first, as shown in FIGS. 7a
Of the front plate 7a and the front of the rear plate 7c are overlapped, and the projection 7b of the front plate 7a is inserted into the window hole 7d of the rear plate 7c. By inserting, the front plate 7a and the rear plate 7c are connected. And
The gap between the window hole 7d and the projection 7b is filled with earth and sand 4, and sufficient rolling is performed.

It is desirable that the base block 10 protrude outside the outer wall surface of the retaining wall because the retaining wall becomes more stable. At this time, if the protruding portion 16 of the base block 10 is filled with the earth and sand 4, the retaining wall becomes more stable. Furthermore,
If a box-shaped block 17 made of styrofoam or the like is erected on the protruding portion 16 of the base block 10 and filled with earth and sand 4 to form a flower bed 18, it is also useful for environmental protection.

At the time of construction, a sediment stop block 19 for preventing the outflow of the earth and sand 4 is integrally provided at the outer edge of the plate-shaped block 7 located on the outermost side of the retaining wall, or It is desirable that the sediment stop block 19 formed of a foam such as styrene foam be separately fitted and used because the retaining wall becomes more stable.

In the illustrated example, the surface block 6 is formed of styrofoam. However, since styrofoam has low weather resistance, it is desirable to apply mortar to the outer wall surface of the retaining wall.

The retaining wall constructed in this manner is covered by the earth and sand 4 around the front and rear, right and left and upper and lower sides of the plate-like block 7, or conversely, the plate-like block 7 surrounds the front and rear and left and right and upper and lower sides of the earth and sand 4. The earth and sand are combined, the earth and sand 4 and the plate-like block 7 are sandwiched, and the retaining wall is solidified as a box as a whole, and is very stable. Further, since the load of the plate-like block 7 and the earth and sand 4 does not reach the surface block 6, even if the mortar is applied to the surface block 6, the mortar does not peel.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of a reinforced earth method according to the present invention.

FIG. 2 is a plan view of an embodiment of a reinforced earth method according to the present invention.

FIG. 3 is a side view of an embodiment of an earth retaining wall and a method of constructing the earth retaining wall according to the present invention.

FIG. 4 is a plan view of the embodiment of FIG. 3 in a construction state;

FIG. 5 is a front view of the embodiment of FIG. 4;

FIG. 6 is a cross-sectional view of another embodiment of the earth retaining wall and the method of constructing the earth retaining wall according to the present invention.

7 is a plan view of the embodiment of FIG. 6 showing the earth retaining wall and the method of constructing the retaining wall of the present invention in a construction state.

8 is a side view of the plate-like block of the embodiment of FIG. 6 showing the retaining wall of the present invention and a method of constructing the retaining wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ground 2 Circular hole 3 Plate 4 Earth and sand 5 Concrete 6 Surface block 6a Front wall of surface block 6b Retention of surface block 6c Notch of surface block 6d Engagement projection of surface block 7 Plate-shaped block 7a Front plate-shaped Body 7b Protrusion at the rear of the front plate 7c Rear plate 7d Window hole at the rear plate 8 Sediment filling hole 9 Projection for preventing sediment flow 10 Base block 11 Drain pipe for drainage 12 Grindstone or gravel 13 Water-permeable sheet 14 Backfilling part 15 Floor slab concrete 16 Projecting part of foundation block 17 Block 18 Flowerbed 19 Sand block

Claims (6)

[Claims] 1. A perforated plate formed of a foam made of a polymer material such as polystyrene foam is installed, earth and sand are piled up on the perforated plate, and after rolling is applied to the earth and sand, it is placed thereon. A reinforced earth construction method characterized by repeating the step of superimposing a perforated plate made of foam, stacking the earth and sand again, and applying compaction to the stacked earth and sand. 2. The reinforced earth method according to claim 1, wherein a plurality of perforated plates made of foam are connected to each other. 3. An appropriate number of stacked surface blocks;
Perforated plate-shaped blocks made of a foam made of a polymer material such as styrene foam bonded to the rear of the surface block, and earth and sand packed between and between the plate-shaped blocks and in the holes of the plate-shaped blocks. An earth retaining wall comprising: 4. A front part of a perforated plate-shaped block formed of a foam made of a polymer material such as styrene foam is joined to a rear part of a surface block forming an outer wall surface of a retaining wall, and soil and sand are formed in the plate-shaped block. Construction method of earth retaining wall characterized by stacking and rolling. 5. The plate-like block is a combined body of a plurality of plate-like bodies, and a projection is provided at a rear portion of the plate-like body located forward,
A window hole for inserting the projection is provided at a front portion of the plate-shaped body located at the rear, so that the front plate-shaped body and the rear plate-shaped body are overlapped and coupled with the projection inserted into the window hole. And, the rear part of the front plate and the front part of the rear plate so that the thickness of the non-overlapping part of the front and rear plate and the overlapping part is also constant. The retaining wall according to claim 3, wherein the wall is formed thin. 6. The retaining wall according to claim 3, wherein a projection for preventing earth and sand flow is formed at a rear end of the plate-like block.