JPH0533348A - Foam resin block laminating construction - Google Patents

Abstract

PURPOSE:To enable work to be easily executed by inserting a grid-shaped sheets with resin applied to grid-shaped fiber sheets obtained from woven synthetic fiber bundles, as reinforcing material, into spaces between laminated foam resin blocks, and by laying the blocks to be laminated. CONSTITUTION:Land 4 is graded, and sand or the like is laid, and improved land 5 is formed. After that, grid-shaped sheets 1 with break elongation percentage equal to or less than 20%, tensile cutting-off strength equal to or more than 1 ton/meter, and resin applied to grid-shaped fiber sheets obtained from woven synthetic fiber bundles with gross fineness equal to or more than 1000 deniers, are laid on the improved land 5. After that, foam resin blocks 6 are laid to be laminated on the sheets 1, and after that, the sheets 1 are laid. Then, work for laying and laminating the blocks 6 is repeated up to a specified level. Besides, the sheets 1 are laid on the most front surfaces, and work for a covering layer 7 and a surface layer 8 is executed, and after that, work for covered filling 9 is executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a civil engineering method for laying and laminating foamed resin blocks which are easy to construct.

[0002]

2. Description of the Related Art Recently, the EPS civil engineering method (Expanded Po
A civil engineering method using expanded polystyrene blocks called lystyrol Construction Method was developed.
In this construction method, expanded polystyrene blocks are laid in two or three layers, laid on a grid-shaped welded reinforcing bar as a reinforcing material, and the expanded polystyrene blocks are laid and laminated on the reinforced polystyrene block. It is a high-rise structure and is used for road construction on soft ground, residential land development, and embankment on slopes.

[0003]

The welded reinforcing bar used as a reinforcing material in the conventional EPS civil engineering method is a construction site assembly, or a factory-produced small unit that can be transported is joined at the construction site. However, laying the welded reinforcing bar is a very laborious work. Further, the welded rebar has a problem that durability is deteriorated due to rusting.

It is an object of the present invention to provide a foamed resin block laying / laminating civil engineering work method which uses a lattice-like sheet which is easy to construct and has durability as a reinforcing material.

[0005]

SUMMARY OF THE INVENTION The present invention is a civil engineering work in which a reinforcing material is inserted between laminated foamed resin blocks to lay and stack the foamed resin blocks, and the reinforcing material is a synthetic material having a total fineness of 1000 denier or more. A foamed resin block laminate characterized by using a lattice-shaped sheet obtained by applying resin to a lattice-shaped fiber sheet obtained by weaving and weaving fiber bundles and having a breaking elongation of 20% or less and a tensile breaking strength of 1 ton / m or more. It is a construction method.

The lattice-like fiber sheet used in the present invention has a total fineness of 1,000 denier or more, preferably 2,000-10.
It is obtained by weaving and weaving a synthetic fiber bundle having a denier of 000. If the total fineness is less than 1,000 denier, the lattice is thin and a sufficient reinforcing effect cannot be obtained. On the other hand, the total fineness is 100,
If it exceeds 000 denier, the quality may be excessive and the production cost may be too high. The single fiber constituting the synthetic fiber bundle has a single fiber fineness of 2 to 30 denier, a cutting strength of 8 g / denier or more, preferably 13 g / denier or more, and a cutting elongation of 20% or less, preferably 15%.
It is preferable to use the following high-strength synthetic fibers. Synthetic fibers with a large cutting elongation have poor creep properties and cannot maintain the construction site stably for a long period of time.

As the synthetic fibers constituting the lattice fiber sheet of the present invention, polyvinyl alcohol fibers, aramid fibers, polyamide fibers, wholly aromatic polyester fibers, polyester fibers, polyolefin fibers, acrylic fibers, carbon fibers, etc. Can be mentioned. Among them, polyvinyl alcohol fibers are suitable for the method of the present invention because they have excellent alkali resistance.

The lattice fiber sheet can be obtained, for example, by a weaving method such as plain weave, warp weave, leno weave, triaxial weave, tetraaxial weave, or a knitting method such as Raschel knitting or weft insertion warp knitting. The size and shape of the grid of the fiber sheet may be appropriately determined depending on the intended use, but usually the resin-processed product has an opening of 10 to 120 mm, and the shape of the grid is square, rectangular, or A shape obtained by knitting or weaving such as a square shape is adopted.

The resin applied to the lattice-like fiber sheet is selected from, for example, vinyl chloride resin, melamine resin, epoxy resin, polyester resin, polyamide resin, isocyanate resin or bituminous mixture.
One type or two or more types of compositions are used. If necessary, the resin may be mixed with additives such as a colorant, a filler, a deterioration inhibitor, a flame retardant, a cross-linking agent, a plasticizer and a solvent.

The resin composition is applied in a paste or liquid form to a grid-like fiber sheet by a dipping method or a coating method,
After removing the excess resin composition and drying, 15 if necessary
The resin is solidified by heat treatment at 0 to 200 ° C. for 1 to 10 minutes. The amount of the resin composition attached to the lattice fiber sheet is
The weight ratio of the resin composition to the lattice fiber sheet is 3/1 to 1 /
5 is preferable, and if it is out of this range, the strength may be insufficient and a sufficient reinforcing effect may not be obtained, or the creep characteristics may be impaired, and the sheet may become a lattice-like sheet that cannot stabilize its shape for a long period of time.

The lattice-like sheet of the present invention has a tensile cutting strength of one cord constituting the lattice-like sheet according to JIS L-10.
Measured according to the 96 method, the converted strength obtained by multiplying the number of cords per 1 m width is 1 ton / m or more, and the breaking elongation is 20% or less, preferably 15% or less. Cutting elongation exceeds 20%, converted strength per 1 m width is 1 ton /
If it is less than m, the laying sheet will be greatly deformed, and the form of the construction site cannot be kept stable over a long period of time. Furthermore, the grid sheet is reinforced with resin so that the elongation (creep) after 1000 hours under the condition of temperature 23 ° C and humidity 60% RH is 10% or less by applying a load equivalent to 30% of cutting strength. Is preferable from the viewpoint of morphological stability. The obtained grid-like sheet is a long product that is lightweight and has a small elongation deformation. Also, a flexible grid-like sheet that can be rolled can be obtained.

The foamed resin block used for civil engineering work is a unit obtained by treating a resin such as a polystyrene resin, a polypropylene resin, or a polyvinyl chloride resin by a usual foaming method such as an in-mold method or an extrusion method. Volume weight is 15-30
A foamed resin block having a Kgf / cm ³ and a compressive strength of 0.7 to 2.0 Kgf / cm ² is generally used.

In the foamed resin block laminating method, the construction site of the civil engineering work is leveled in advance, and if necessary, the ground improvement work is performed, and then a grid sheet is laid or one level of the foamed resin block is laid directly on the leveled ground. Or after laying several stages,
Laying a lattice sheet, and further stacking a foamed resin block on it to stack up to a desired height,
This is a construction method in which a grid-like sheet is laid on the outermost surface, then a covering layer is formed by laying concrete or laying concrete plates, and then a surface layer is formed by pavement or embankment.

This civil engineering method is excellent in workability and is particularly effective for construction in places where durability is required, and construction in places with poor environment such as soft ground and high moisture content to which EPS civil engineering method is applied. Suitable for road construction and slope extension work.

The foamed resin block laminating method of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of a lattice-like sheet used in the method of the present invention, which is a lattice-like sheet 1 in which a resin 3 is applied to a lattice-like fiber sheet 2 obtained by weaving and weaving a synthetic fiber bundle for reinforcement. FIG. 2 is a cross-sectional view showing an example of the foamed resin block laminating method of the present invention. The ground 4 at the construction site is leveled, and the grid-like sheet 1 is laid on the ground 5 improved with sand and the like, and then foamed. The resin block 6 is laid and laminated, then the lattice sheet 1 is laid, and further the construction in which the foamed resin block is laid and laminated is repeated up to a predetermined height, and the lattice sheet 1 is laid on the outermost surface to form the covering layer. 7 and the surface layer 8 were constructed, and the covering embankment 9 was constructed to construct the road.

FIG. 3 is a cross-sectional view showing another example of the foamed resin block laminating method of the present invention, in which the ground 4 at the construction site is leveled, and the grid-like sheet 1 is added to the ground 5 improved with sand. Laying and laying the foamed resin block 6 and laying the lattice-shaped sheet 1'on the both ends of the lattice-shaped sheet wrapping the laid-up end of the foamed resin block 6'layed on the lattice-shaped sheet 1 '. The work of laying 'is repeated up to a predetermined height, the grid sheet 1 ⁿ ' is laid on the outermost surface, concrete plates and concrete blocks are stacked on both sides, and the protective wall 10 is constructed by applying mortar, etc. The ring layer 7 and the surface layer 8 were constructed to construct an upright wall road.

[0017]

[Function] By using a lattice-like sheet of low elongation and high strength obtained by reinforcing a lattice-like fiber sheet made by weaving and weaving the synthetic fiber bundle of the present invention with a resin as a reinforcing material for civil engineering work by laying and laminating foamed resin blocks, The work of laying the reinforcing material is easy, durability is not deteriorated due to rusting, etc., and the construction site can be kept stable for a long period of time.

[0018]

EXAMPLES Next, embodiments of the present invention will be described with reference to Examples. The parts and% in the examples relate to weight unless otherwise specified.

Example 1 Polyvinyl alcohol fiber having a breaking strength of 17 g / dr and an elongation of 8.5% was used, and the warp was 1,200 dr-600 fil / 2.
3 multi-filament yarns are ply-twisted, and weft yarns are 1,800 dr-1,000 fil / 2 plies of 2 multi-filament yarns are ply-twisted. A grid-like fiber sheet having a width of 214 cm was prepared. Further, as a reinforcing resin, an epoxy resin composition 5 obtained by adding an amine curing agent to an initial condensation polymer of an epoxy resin 5
A liquid material obtained by blending 0% and 50% of a vinyl chloride resin composition obtained by blending 100 parts of vinyl chloride resin with 50 parts of dioctyl phthalate as a plasticizer and 3 parts of a stabilizer is used for the above lattice fiber sheet. 100%, 130 ° C
After being dried with hot air, heat treatment was performed at 180 ° C. for 2 minutes to obtain a resin-reinforced grid sheet. This grid-like sheet has the flexibility to be rolled up, has a cutting strength of 7 ton / m or more in both warp and weft directions, a cutting elongation of 3.5% and an elongation of 2.
It is 8%, has high strength, is excellent in stability of elongation form, and is easy to handle and laying workability.

The grid-like sheets are laid in three rows in the width direction on the ground in which the paddy fields in the mountains have been preliminarily ground, and the sheets are connected by a string-like material obtained by applying a resin to a polyvinyl alcohol fiber bundle, and then expanded polystyrene. Block (Unit volume weight 2
0 Kgf / m ³ , compressive strength 1.2 Kgf / cm ² , thickness 500 mm,
A road with a width of 1000 mm and a length of 2000 mm) is laid in two steps, and a grid sheet is laid on the two steps, and the test road has a height of about 4 m, a width of 5 m, and a length of 10 m, as shown in the sectional view of FIG. Build the foundation of, and lay a grid sheet on the outermost surface,
Concrete was cast, the surface was paved, and the slope was covered with a protective coating to construct a test road as shown in FIG.

Comparative Example 1 A test road construction work was carried out following Example 1 by a conventional method using grid-like welded reinforcing bars instead of the grid-like sheet laid between the expanded polystyrene blocks of Example 1. The grid-shaped welded reinforcing bars were laid by factory production to a size that could be transported by truck, and the grid-shaped welded reinforcing bars were connected by welding.

As a result, when the road construction of the same scale as that of Example 1 was compared, the construction of Comparative Example 1 took a lot of time and labor for laying the welded reinforcing bars, and the construction period was extended by about 25%.

Example 2 A wholly aromatic polyester fiber having a breaking strength of 26 g / dr and an elongation of 3.7% [trade name “Vectran” manufactured by Kuraray Co., Ltd.] was used, and the warp was made of 1,000 dr-200 fil / 2 strands. Multifilament ply yarn is used for wefts, 1,000dr-200fil /
A lattice-like fiber sheet having an opening of 20 mm and a width of 214 cm was prepared by a Raschel knitting method using a yarn obtained by ply twisting three two multifilament yarns. On the other hand, as a reinforcing resin, a vinyl chloride resin composition prepared by mixing 100 parts of vinyl chloride resin with 60 parts of dioctyl phthalate and chlorinated paraffin plasticizer and 3 parts of stabilizer was used, and 100% of the resin composition is impregnated and applied.
It was dried with hot air of 0 ° C. and heat-treated at 180 ° C. for 2 minutes to obtain a grid sheet. This grid-like sheet has the flexibility of being able to be wound into a roll, and has a breaking strength of 3.5 tons / m or more, a weft of 8 tons / m or more, a cutting elongation of 2%, and an elongation of 1.5%.
It has high strength and excellent stability of stretched form, and has good workability for laying.

Foamed polystyrene block (unit volume weight 25 Kgf / m ³ , compressive strength 1.6 Kgf / cm ² , thickness is prepared by excavating the ground on the slope of a hilly area in advance and laying a concrete foundation on the ground. 500mm, width 1000mm, length 2
000 mm) is laid, the grid sheet is laid on it, and the end of the grid sheet of the slope is fixed with a fiber-reinforced resin pile made of a resin processed polyvinyl alcohol fiber bundle, and the other side of the grid sheet is fixed. End of the foam polystyrene block laid on it is folded and placed on the surface of the laying block, and a grid sheet is laid on it, and the grid sheet end of the slope is the same as above. It was fixed with a pile on the other end, and the work of repeatedly wrapping the end of the expanded polystyrene block laid on it at the other end and folding it back on the surface of the laying block was carried out. If necessary, the folded grid sheet and the laid grid sheet may be fixed by stopping with a string-like material. Then, a grid-like sheet was laid on the outermost surface, concrete was poured, and paved to form the surface. Since the entire wall surface is covered with a lattice-like sheet, mortar was cast to form a covering protection surface to form an upright wall. The lattice-like sheet used was high in strength, excellent in morphological stability, and excellent in adhesiveness with cement, and thus was suitable as a cement reinforcing material.

Although the sloped embankment portion that was created was used as a parking lot, it had good drainage of rainwater and sprinkling water and had a stable form.

[0026]

The foamed resin block laying and laminating method of the present invention is excellent in handleability and workability because it uses a long flexible grid-like sheet having a roll winding property made of a synthetic fiber bundle as a reinforcing material. The construction period can be shortened, and due to the high strength and low elongation, the construction site can be kept stable for a long period of time. Especially, it is effective for civil engineering work in places with bad environment such as soft ground and places with a lot of water, and places with large area. Further, there is no deterioration in durability due to rusting or the like as in the case of using the grid-shaped welded reinforcing bar in the use environment.

[Brief description of drawings]

FIG. 1 is a schematic view of a lattice sheet used as a reinforcing material for civil engineering work of the present invention.

FIG. 2 is a cross-sectional view showing an example of a foamed resin block laminating method of the present invention.

FIG. 3 is a cross-sectional view showing another example of the foamed resin block laminating method of the present invention.

[Explanation of symbols]

1 grid-like sheet, 1 'grid-like sheet, 1 ^n' grid-like sheet, 2 grid-like fiber sheet, 3 resin, 4 ground, 5 improved ground, 6 foamed resin block, 6 'foamed resin block, 7 covering layer, 8 surface layer, 9 covered embankment, 10 protective wall.

Claims (1)

Claim: What is claimed is: 1. In civil engineering work in which a reinforcing material is inserted between laminated foamed resin blocks to lay and stack the foamed resin blocks, the reinforcing material is a synthetic fiber bundle having a total fineness of 1000 denier or more. Resin is added to the lattice fiber sheet obtained by weaving and weaving, and the breaking elongation is 20% or less and the tensile cutting strength is 1 ton.
A foamed resin block laminating method characterized by using a lattice-shaped sheet having a thickness of at least 1 / m.