JPH0726540A - Ground reinforcement structure and ground reinforcement construction method - Google Patents

Abstract

PURPOSE:To prevent ground reinforcement structure from sinking and swelling and thereby stabilize the structure by arranging a bag body packed with a light aerated concrete, a solidifying agent and a curb in the soft ground and heaping up earth on the bag body thereby reincforcing the ground. CONSTITUTION:After leveling a soft ground 11, a polypropylene made construction stablizing sheet 12 is laid thereon. A curb 13, which is logs piled crosswise in two parallels, set on the construction stabilizing sheet 12. Simultaneously, a mixture of a light aerated concrete 14, which is a scrap wood of ALC board shattered to a certain size, and a cement solidifying agent 15 is heaped up and leveled around the curb 13. The surroundings of the curb 13, the light aerated concrete 14 and the cement solidifying agent 15 are completely covered with the construction stabilizing sheet 12. Simultaneously, the overlapping portions of the construction stabilizing sheet are stitched up together and packed. After curing the light aerated concrete 14, the brought-in earth is heaped up thereon.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground reinforcement structure and a construction method for constructing the structure, and more particularly to a ground reinforcement structure using lightweight cellular concrete and a ground reinforcement construction method.

[0002]

2. Description of the Related Art As a conventional ground reinforcement method of this type,
2 and the EPS method (second known technology) shown in FIG. 3, and the Japanese Patent Laid-Open No. 4 (1999) -4100 shown in FIG.
The embankment construction method using waste material (third publicly known technique) of Japanese Patent Publication No. 203023 is known.

In the first known technique, as shown in FIG. 2, a civil engineering stabilization sheet 4 is laid on a soft ground 6, and a girder 2 in which miscellaneous wood saddles 1 and logs are combined in a girder pattern is placed thereon. ,
Further, it is a structure in which the carried-in soil 3 is entirely embanked.

In the second known technique, the civil engineering stabilization sheet 4 is laid on the soft ground 6, the sand 8 having a predetermined thickness is placed thereon, and the expanded polystyrene blocks 9 are stacked. It has a structure in which the incoming soil 7 is entirely embanked from above.

Further, the third known technique is as shown in FIG.
A bag body 23 in which a waste material 20 such as a bottle, a can or a pack and a lightweight material 21 such as styrofoam, urethane foam or polyurethane is filled in a vinyl bag 22 is sequentially laminated in a block shape, and the carry-in soil 24 is placed thereon. This is an embankment construction method with a structure with embankment.

[0006]

However, in the first known technique, since the structure of the bag body 5 has an extremely large weight,
When the bag body 5 is arranged on the soft ground 6, there is a problem that the settlement amount is large. Further, in the second known technique, since the expanded polystyrene block 9 is used, it is light and convenient to handle, but the load dispersibility is poor, the stability is poor, the cost is high, and the chemical resistance is high. Since they are weak in oil resistance and vibration resistance, respectively, there is a problem that they cannot be used in places such as pesticides, bad sewage, and oil leaks from vehicles. In addition, the application place is limited due to the rise of groundwater.

Furthermore, the third known technique is useful for resource reuse and environmental purification because waste materials such as bottles and cans can be used, but it is difficult to disperse the load of the entire bag as a whole. In addition, the allowable load is limited, and when used for a long period of time, there are problems such as the volume phenomenon of the embankment structure due to the use of waste materials such as bottles, cans, and packs, and environmental pollution due to expanded polystyrene and the like.

The ground reinforcement structure and the reinforcement method therefor according to the present invention are completely new technologies developed in view of the above-mentioned conventional problems. In particular, lightweight cellular concrete and double girders such as logs and the like are integrally solidified. This is a completely new technology that reinforces the soft ground by combining with a solidifying agent that is used in the bag. In addition, lightweight cellular concrete and log girders and other girders are appropriately mixed with sand, crushed stone, waste materials such as concrete, or slag, and by combining with a solidifying agent that solidifies these integrally in the bag body, Since the specific gravity can be changed arbitrarily according to the high and low levels, it prevents floating and can be used in a wide range.

[0009]

The ground reinforcement structure according to the present invention is a technique which has fundamentally improved the above-mentioned conventional problems, and the gist thereof is a lightweight cellular concrete for reinforcing soft ground. A ground reinforcement structure using, wherein the bag body containing the light-weight cellular concrete, the solidifying agent, and the cross girder is arranged on the soft ground, and soil is laid on the bag body to reinforce the ground. It is a reinforced structure. Further, the bag body is characterized by mixing at least one kind selected from waste materials such as sand, crushed stone, and concrete, or slag.

[0010] The gist of the ground reinforcement method according to the present invention is to pack lightweight cellular concrete, a solidifying agent, and a cross girder into one body, and then place the light foamed concrete on a soft ground, and then to place it on the bag body. This is a ground reinforcement method that is characterized by filling the ground with soil to reinforce the ground.

[0011]

As described above, the ground reinforcing structure and the reinforcing method therefor according to the present invention fill a large amount of lightweight cellular concrete in the bag body, so that the weight of the bag body itself can be lightened, which allows the soft ground to be ground. It is possible to prevent the bag body from largely sinking when it is placed in. Further, as the lightweight cellular concrete, it is possible to use the crushed material of ALC plate such as waste material and cut-off material as it is.

Further, since the log girders and the like are enclosed in the bag body, the load can be totally dispersed by the action of the girder, and the bag body can be stably arranged on the soft ground. . Furthermore, because a solidifying agent such as cement was mixed with the lightweight cellular concrete in the bag body, the lightweight cellular concrete around the well was solidified as a whole, thereby blocking the entire bag body and significantly improving the overall strength. It can be done.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, a ground reinforcement structure and a reinforcing method therefor according to the present invention will be explained. In the present invention, as shown in FIG. A sheet 12 is laid, and a cross girder 13 in which logs are assembled like a cross girder is placed on the civil engineering stabilization sheet 12.

A mixture of light-weight cellular concrete 14 obtained by crushing waste material of ALC plate to a certain size and cement solidifying agent 15 in a mixing plant in a factory is piled up around the well girder 13 and leveled. 13,
The light-weight cellular concrete 14 and the cement solidifying agent 15 are completely covered with the civil engineering stable sheet 12, and the superposed portions of the civil engineering stable sheet 12 are sewn together and packed.

In this state, the cement-solidifying agent 15 works to solidify the lightweight cellular concrete around the wells 13. After the soil is cultivated for about 1 week, the carry-in soil 16 is filled on the bag body, and the carry-in soil 16 is shaped and compacted to construct the ground reinforcement structure.

In the above embodiment, the mixing ratio of the lightweight cellular concrete and the cement solidifying agent 15 is 95 kg (16%) of the cement solidifying agent 15 and 244 Kg of water (70% w).
et base), lightweight cellular concrete (aggregate) 14 3
After mixing at a rate of 50 kg, the lightweight cellular concrete 14 used as the aggregate could be integrated into a very good state by the hydration reaction by the solidifying agent 15.

The lightweight cellular concrete 14 used as the aggregate in the above embodiment is discharged at the construction site A
Waste material and chips of LC plate can be economically used at low cost. It is effective that the ALC plate is crushed to have a particle size of 0 to 40 m / m. As described above, the civil engineering stabilization sheet 12 is preferably made of polypropylene because of its high tensile strength. Further, nylon, ester, polymer resin net, non-woven fabric and the like are also effective. In addition, it is effective that the cross beam 13 is made of a combination of pine wood and the like that can be obtained at low cost and is resistant to corrosion.

In the case of carrying out the present invention, since the cross girders 13 are present in the bag body, the cross girders 13 serve to disperse the load and prevent the concentrated load from occurring. Further, the lightweight cellular concrete 14 as an aggregate filled around the well girder 13 is solidified by the cement solidifying agent 15 and integrated with the well girder 13, and these well girders 13 and the lightweight cellular concrete 14 are integrated. Since it is entirely packed with the civil engineering stabilization sheet 12, it is stable as a whole, does not collapse, and is extremely convenient to handle. When the present invention was carried out on soft ground such as loam, silt and masa soil, the amount of subsidence was small and good. Further, it was possible to obtain a ground having excellent chemical resistance, oil resistance, vibration resistance and the like. The embodiment shown above is merely an example and is not limited to the above method.

[0019]

The ground reinforcement structure and the ground reinforcement method according to the present invention have the above-described structure and operation, and therefore, the following effects can be obtained.

(1) In the present invention, since lightweight cellular concrete having a small specific gravity is used as an aggregate, its own weight can be reduced and the amount of sinking can be reduced. (2) A large amount of waste ALC plates and the like can be effectively used at low cost. (3) Light-weight cellular concrete is solidified with a solidifying agent and packed with a civil engineering stable sheet, so that it is stable as a whole, does not collapse, and is easy to handle.

(4) Since the bag is provided in the bag, the load dispersibility can be further improved, and thus the concentrated load can be prevented.
(5) Since it is composed of lightweight cellular concrete, solidifying agent and double girder inside the bag, it has excellent oil resistance, chemical resistance, vibration resistance, etc. where pesticides are used, where bad sewage flows, and oil leaks from vehicles. It can be installed as it is even in a place where there is.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a ground reinforcement structure according to the present invention.

FIG. 2 is a cross-sectional explanatory view showing a first example of a conventional ground reinforcement structure.

FIG. 3 is a cross-sectional explanatory view showing a second example of the conventional ground reinforcement structure.

FIG. 4 is a cross-sectional explanatory view showing a third example of a conventional ground reinforcement structure.

[Explanation of symbols]

1 Sodada 2 Cross girder 3 Imported soil 4 Civil engineering stabilization sheet 5 Bag body 6 Soft soil 7 Transport soil 8 Sand 9 Expanded polystyrene block 20 Waste material 21 Lightweight material 22 Vinyl bag 23 Transport soil 10 Bag body 11 Soft soil 12 Civil engineering Stabilization sheet 13 Double girder 14 Lightweight cellular concrete 15 Cement solidifying agent 16 Loading soil

Front Page Continuation (72) Inventor Satoshi Wada 8 1 Seino Construction Co., Ltd. 1159 Miwa, Ibigawa-cho, Ibi-gun, Gifu Prefecture

Claims (3)

[Claims] 1. A ground reinforcement structure using lightweight cellular concrete to reinforce soft ground, wherein a bag body in which the lightweight cellular concrete, a solidifying agent, and a girder is packed is arranged on the soft ground. A ground reinforcement structure characterized by placing soil on top to reinforce the ground. 2. The ground reinforcement structure according to claim 1, wherein the bag body is mixed with at least one kind selected from waste materials such as sand, crushed stone, concrete, etc., or slag. 3. Light-weight cellular concrete, a solidifying agent, and a cross girder are packaged and integrated in a bag body, and then placed on a soft ground, and soil is laid on the bag body to reinforce the ground. Characteristic ground reinforcement method.