JPH07113223A - Construction method by hollow plastic grain body - Google Patents

Abstract

PURPOSE:To make it possible to construct an earth structure economically with high work efficiency even on a soft subsoil or in a land-sliding earth by using hollow plastic grain bodies or sacked grain bodies as filling materials, backing materials, back filling materials, etc. CONSTITUTION:When an earth structure is constructed, hollow plastic grain bodies 3 or sacked grain bodies 2 are used as filling materials on a soft subsoil 1. The hollow plastic grain bodies 3 or the sacked grain bodies 2 are used as backing materials for a retaining wall, the filling materials in a mounting section of the structure and back filling materials in the upper part and peripheral section of a buried substance. In addition, in a lapping type reinforcing soil method using geotextile or geogrid, the sacked grain bodies 2 of the hollow grain bodies 3 are also applicable to sandbags for sandbagging.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method using hollow plastic particles. More specifically, the present invention relates to a construction method using hollow plastic particles useful for embankment, backfilling, backfilling and the like in the field of constructing earth structures and anti-earth pressure structures.

[0002]

2. Description of the Related Art Conventionally, rock, soil and the like have generally been used for embankment, backfilling and backfilling in the construction field of earth structures and anti-earth pressure structures. For this reason, embankment or backfilling on soft ground or landslides causes subsidence and instability of the ground, making it difficult in practice.

[0003] In recent years, a lightweight embankment method capable of securing ground stability and ground subsidence measures for such soft ground has begun to be researched and developed, and several lightweight embankment methods have been proposed. There is also. However, those lightweight embankment methods have problems in terms of cost and workability,
Some were not light enough.

The present invention has been made in view of the above circumstances, and enables embankment even if the ground for constructing a structure is soft ground or landslide causing subsidence or instability. The purpose is to provide a new construction method.

[0005]

Means for Solving the Problems The present invention is to solve the above-mentioned problems, and in the construction of a soil structure, a hollow plastic granule or a hollow plastic granule obtained by bundling the granule is used as an embankment material. A construction method using plastic granules is provided. In addition, use hollow plastic granules as a backfill material for the retaining wall, or those packed in a bag, and use hollow plastic granules as an embankment material at the mounting portion of the structure or a bag of this , The upper part and the peripheral part of the buried object are backfilled with hollow plastic granules or those packed in a bag, and the sandbag in the reinforced earthwork method using geotextile or geogrid. There is also provided a construction method using hollow plastic granules, which is characterized in that a bag of hollow plastic granules is used as the sandbag of the claw.

[0006]

As described above, the present invention uses a lightweight embankment material made of hollow plastic granules for embankment, backfilling and backfilling in the construction field of earth structures and anti-earth pressure structures. More specifically, it enables embankment on soft ground or on landslides where there is a possibility of ground subsidence and stability of the ground. When used for backfilling a retaining wall, horizontal earth pressure can be reduced, and when used for embankment of the attachment part of structures such as abutments, it can reduce horizontal earth pressure and prevent the occurrence of steps in the attachment part due to subsidence. Is also effective. If it is used for backfilling the upper part of the buried object and the surrounding area, vertical earth pressure can be reduced, and hollow plastic granules are packed in the bag instead of the crushed sandbag in the reinforced earthworks method using geotextile. If used, the workability is improved because it is lighter than crushed sandbags.

The hollow plastic granules can be used as recycled plastic waste materials, so that the cost can be kept low, and it is also preferable from the viewpoint of environmental problems. Furthermore, depending on the purpose of use, the strength and weight of the hollow plastic can be changed by changing the degree of hollowness of the plastic granules. By packing the hollow plastic granules in a bag, workability is also improved. There is also an advantage that it can be applied to various shapes. In the case of bag filling, a woven cloth, a non-woven cloth, a net body, a wire mesh body or the like can be used. Further, when the hollow plastic granular material is used as it is, it is possible to carry it out by pressure feeding with air.

The present invention will be described in more detail with reference to the following examples.

[0009]

Example: A waste plastic material such as vinyl chloride resin is melted at a high temperature and blow molded to an outer diameter of 25 to 45 m.
A hollow spherical plastic granular material having m and a wall thickness of 0.3 to 2 mm was prepared. The compressive fracture strength is, for example, 100 to 250.
It is possible to prepare the thing of about kg.

FIGS. 1 and 2 show an example of embankment made by packing hollow plastic granules on a soft ground. In FIG. 1, a net body having hollow plastic granules (2) directly packed on the soft ground (1) is used as a bag. In FIG. 2, the soft ground (1) is excavated and replaced with hollow plastic granules (3), and then the hollow plastic granules (2) directly packed in a bag are piled up.

By replacing the soft ground (1) with the hollow plastic granules (3) and arranging it, the whole ground is further reduced in weight, and it is effective in preventing ground subsidence and stability of the ground. . The hollow plastic granules (2) and (3) may be used in combination with an ordinary embankment material. Alternatively, normal embankment may be performed on the surface layer. FIG. 3 shows an example of embankment with hollow plastic granules (2) packed in a landslide area (4).

In this embodiment, the hollow plastic granules (2) are used to fill the soil so as not to induce landslides, thereby retaining the soil also as a restraining pile. Figure 4
Is an example of using hollow plastic granules (2) for the backfill material of the retaining wall (5). If the embankment (6) is made to have a stable gradient, it is advantageous because earth pressure is not applied. Further, when the hollow plastic granules (2) packed in a bag are stacked, the self-supporting property is good, and the earth pressure applied to the retaining wall (5) is greatly reduced.

FIG. 5 shows an example of using hollow plastic granules (2) as the embankment material on the back surface of the abutment (7). It is effective in reducing the earth pressure and preventing a step in the mounting part (8) due to the subsidence of the abutment back surface (6). The hollow plastic granules (2) may be used in combination with an ordinary embankment material. Alternatively, normal embankment may be performed on the surface layer.

FIG. 6 shows an example of using hollow plastic granules (2) for backfilling the buried pipe (9). Normally, a high vertical earth pressure is applied to the buried pipe (9) in high embankments, but the hollow plastic granules (2) are used to reduce the weight of the embankment to reduce the vertical earth pressure applied to the buried pipe (9). can do.

FIG. 7 is an example of a reinforced embankment using a geotextile having a wall surface (10). By using the sandbag of the hollow plastic granular material (2) having a certain strength, it is lightweight and the workability is improved. Walls can be reinforced concrete walls, concrete panels, shotcrete, block laying, etc.

[0016]

As described above in detail, the construction method using the hollow plastic granules of the present invention enables embankment on soft ground or landslides, which is economical and has high workability. It becomes possible.

[Brief description of drawings]

FIG. 1 is a schematic diagram of Example 1 in which a hollow plastic granular material is used to fill an embankment on soft ground.

FIG. 2 is a schematic view of Example 1 in which a hollow plastic granular material is bag-filled on soft ground to embank it.

FIG. 3 is a schematic diagram of Example 2 in which a landslide ground is filled with hollow plastic particles.

FIG. 4 is a schematic view of Example 3 in which hollow plastic particles are used as a backfill material for a retaining wall.

FIG. 5 is a schematic diagram of Example 4 in which hollow plastic granules are used as the embankment material on the back surface of the abutment.

FIG. 6 is a schematic diagram of Example 5 in which a hollow plastic granular material is used for backfilling a buried pipe.

FIG. 7 is a schematic view of Example 6 in which a hollow plastic granular material having a certain strength is used for a reinforced embankment using a geotextile having partition walls.

[Explanation of symbols]

 1 Soft ground 2 Packed hollow plastic granules 3 Hollow plastic granules (replacement part) 4 Landslide ground 5 Retaining wall 6 Embankment 7 Abutment 8 Mounting part 9 Buried pipe 10 Wall surface

Claims (5)

[Claims] 1. A method of constructing a hollow plastic granular material or a hollow plastic granular material in which the granular plastic is packed in a bag for use as an embankment material in the construction of a soil structure. 2. A construction method using a hollow plastic granular material or a hollow plastic granular material in which the hollow plastic granular material is packaged into a bag as a backfill material for a retaining wall. 3. A construction method using hollow plastic granules or a hollow plastic granules obtained by bundling the hollow plastic granules as an embankment material at a mounting portion of a structure. 4. A method for constructing a hollow plastic granular material in which the upper part and the peripheral part of the buried object are backfilled with a hollow plastic granular material or a bag-packed product. 5. A construction method using hollow plastic granules, which is a wound-up reinforced earth method using a geotextile or a geogrid, in which a bag of hollow plastic granules is used as a sandbag containing sandbags.