JPH0355317A - Grid-shaped ground reinforcement material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a lattice-shaped reinforcing material used for reinforcing embankments and the like.

``Prior art'' Conventionally, as a concrete reinforcement G5 material buried in the concrete structure parts of various concrete structures etc. in place of reinforcing reinforcing bars, wire mesh, etc., patent application No. 60-295
There is an application filed as No. 751.

In this concrete reinforcing member, fiber bundles made of a plurality of aligned fibers cross each other to form a lozenge shape, each fiber of the fiber bundles is bound with a resin material, and the fiber bundles are The cross section has a cross-sectional shape in which three or more layers of fiber groups extending in one direction and fiber groups extending in the other direction are laminated. There are also several construction examples that actually use this type of concrete reinforcing member.

On the other hand, in recent years, in the field of civil engineering works such as land development, roads, and railways, efforts have been made to stabilize the embankment by burying, for example, grid-shaped reinforcing materials in layers in the embankment and using the pull-out resistance of the reinforcing materials. These embankment structures are attracting attention due to their strength and stability. Therefore, it has been considered to use a concrete reinforcing member having the above structure as a reinforcing material for such embankments.

``Problem to be solved by the invention'' However, the concrete reinforcing members used for reinforcing concrete structures as described above have a thickness of 2.
Because it is relatively thick (about 100 yen), when it is buried in the soil as a reinforcing material for an embankment, it does not blend well with the soil and has poor workability.In addition, this reinforcing material is hard and rigid and difficult to bend, so the embankment was compacted. Sometimes that rolling force is not evenly transmitted under the reinforcement,
As a result, the lower layer of the embankment may not be sufficiently compacted, or the upper layer of the embankment may not be leveled.
Additionally, there was a risk that the rolling force would be concentrated in one place, leading to damage.

This invention was made in view of the above circumstances, and aims to provide a lattice-shaped reinforcing material that has high strength, is easily compatible with soil, and has sufficient pull-out resistance when buried in embankment. .

"Means for Solving the Problems" The lattice-like reinforcing material of the present invention is a lattice-like reinforcing material used for reinforcing the ground, etc., and is composed of one or more layers of fibers in the main axis direction, consisting of a plurality of aligned fibers. A bundle and two or more layers of fiber bundles extending in the other direction intersect with each other to form a lattice shape,
These fiber bundles are bound by a resin material, and at the intersection of the fiber bundles, each fiber bundle located in the outermost layer extends in the other direction, and the bulge at the intersection is crushed by press molding. Furthermore, the distance between adjacent intersections in the main axis direction is larger than the distance between adjacent intersections in the other direction.

"Function" The lattice-shaped ura reinforcing material of the present invention has one or more layers of fiber bundles in the main axis direction consisting of a plurality of aligned fibers and two or more layers of fiber bundles extending in the other direction, which intersect with each other. The fiber bundles are bound together by a resin material, and each fiber bundle located in the outermost layer extends in the other direction at the intersection of the fiber bundles, and the fiber bundles have a bulge at the intersection. By being crushed by press forming, the strength of the intersection is extremely high, and the thickness is thin, so
When buried in embankment, it integrates with the soil and provides sufficient pull-out resistance.

In addition, in this lattice-shaped reinforcing material, the interval between adjacent intersections in the main axis direction is larger than the interval between adjacent intersections in the other direction, so that the fiber bundles in the main axis direction are bent. It is easy to use, is not easily bent and damaged when buried in embankment and compacted, and blends well with the soil, so when the embankment is compacted, the rolling force is evenly transmitted to the bottom of the reinforcing material.
As a result, the lower layer of the embankment is sufficiently compacted, and
The upper layer of the embankment can be leveled out.

"Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 7.

The lattice-shaped reinforcing material l of this example is a reinforcement material to be buried in layers in the embankment to stabilize the embankment, and as shown in Fig. 1, it consists of a large number of aligned fibers. Fiber bundles 2B, 2B having the same configuration as the fiber bundle 2A in the main axis direction consisting of
intersect with each other to form a lattice shape, and the fiber bundle 2A
and fiber bundles 2B are bound together with a resin material 3.

As shown in FIGS. 2 and 3, the intersection 4 between the fiber bundle 2A and the fiber bundles 2B, 2B is formed by connecting the fiber bundle 2A extending in the main axis direction and the other direction perpendicular to the main axis direction. The extending fiber bundles 2B, 2B are laminated to have a three-layer cross-sectional shape, and the outermost layer at the intersection 4 is the fiber bundle 2B, 2B in the other direction, and a bulge at the intersection. are crushed by the brace cylindrical shape, and furthermore, the distance between adjacent intersecting portions 4, 4 in the main axis direction is larger than the distance between adjacent intersecting portions 4, 4 in the other direction.

The fibers 2 forming the main body of this lattice-like reinforcing material 1 are as follows:
Glass fibers, carbon fibers, etc., which are lightweight and have high strength, are suitable, but other fibers such as organic fibers, ceramic fibers, metal fibers, etc. may be used if necessary. Further, these fibers may be used in appropriate combination.

Further, as the resin material 3 for binding the fibers 2 of the fiber bundles 2A and 2B, for example, vinyl ester resin, which has good adhesion to the fibers 2 and has sufficient strength itself, is suitable, but Other resin materials may be used depending on the type of fiber 2. For other resin materials,
Examples include unsaturated polyester resins, epoxy resins, and phenol resins.

The ratio of the fibers 2 to the resin material 3 is appropriately determined by taking into consideration the type and strength of the fibers 2, and the usage pattern of the lattice reinforcing material l. For example, if the fibers 2 are glass fibers or resin materials, When 3 is a vinyl ester resin, the volume ratio of the fiber 2 should be about 30 to 70%, and when the fiber 2 is, for example, pitch-based carbon fiber, it should be about 20 to 60%. desirable. If the proportion of fibers 2 is below the above, the strength of this lattice-shaped reinforcing material l will be significantly reduced.On the other hand, if the proportion of fiber 2 is increased, a lattice-shaped reinforcing material l of correspondingly high strength can be obtained, but if it is too much A high proportion makes molding difficult, which is not preferable.

The lattice-shaped reinforcing material I having such a structure can be manufactured using, for example, the apparatus shown in FIG. 4.

In the figure, numeral 5 is a surface plate, 6 is a guide frame provided around the surface plate 5, and 7 is provided side by side on the outer surface of the surface plate, and corresponds to the horizontal and vertical components of the lattice-shaped reinforcement 1, respectively. It's a bottle. Regarding the manufacturing method, continuous fibers impregnated with resin are sequentially hooked in the corresponding bins 7 in the vertical and horizontal directions in a so-called one-stroke manner. Make sure to intersect them while holding them in place. FIG. 5 shows an example of a method of laminating the intersection portion 4, in which a fiber bundle 2A and a fiber bundle 2 are constructed by impregnating a resin material 3 with a large number of fibers 612 bundled together.
B. 2B in the order of arrowed numbers in the figure, one layer of fiber bundles 2A in the main axis direction is sandwiched between two layers of fiber bundles 2B, 2B perpendicular to this,
They are stacked so that each intersection 4 has a cross-sectional shape as shown in FIGS. 6 and 7. After doing this, before the resin material 3 of each layer is hardened, it is pressed to reduce the thickness, especially the intersections 4 are crushed, and a three-layer structure as shown in FIGS. 2 and 3 is formed. It is formed into a cross-sectional shape of a layered structure, and is formed into a rectangular lattice shape having substantially the same thickness with almost no steps as a whole.

For example, when constructing an embankment using such a lattice-shaped reinforcing material, first layer earth and sand to a predetermined thickness on the foundation to form a first layer, and then add lattice-shaped reinforcement on top of the first layer. Along with laying the material l, the lattice reinforcement material! By repeating the operation of piling earth and sand on top, the second and third layers are successively stacked, and each time each layer is formed, a layered embankment structure is formed by compacting it using heavy equipment. To go.

As shown in FIG. 1, the lattice-shaped reinforcing material l of this example is formed by press molding into a rectangular lattice shape with almost no steps and approximately the same thickness as a whole, but as shown in FIG. 8. The thickness of the intersection portion 4 is adjusted to the fiber bundle 2B. Press molding to match the thickness of the member in the other direction consisting of 2B,
There is no problem even if the thickness of the member in the main axis direction consisting of the fiber bundle 2A is made thinner than this. In this case, for example, when constructing an embankment and forming a wall by involving the embankment material, it is possible to increase the pull-out resistance acting toward the outside of the embankment.

In addition, in the lattice-shaped reinforcing material l of this embodiment, the fiber bundle 2A in the main axis direction is made of one layer, the fiber bundle 2B in the other direction is made of two layers, and the intersection part 4 has a three-layer structure. For materials, the intersection 4 may have a five-layer structure as shown in FIG. 9, or the intersection 4 may have a seven-layer structure as shown in FIG. It is sufficient that the outermost layer is the fiber bundle 2B in the other direction.

"Effects of the Invention" According to the lattice-shaped reinforcing material of the present invention, one or more layers of fiber bundles in the main axis direction consisting of a plurality of aligned fibers and two or more layers of fiber bundles extending in the other direction. The fiber bundles intersect with each other to form a lattice shape, and the fiber bundles are bound together by a resin material, and at the intersection of the fiber bundles, each fiber bundle located in the outermost layer extends in the other direction, and The bulges of the parts are crushed by press forming, and the distance between adjacent intersections in the main axis direction is larger than the distance between adjacent intersections in the other direction, so the following advantages are achieved. It is possible to achieve the following effects.

That is, the fiber bundles located in the outermost layer extend in the other direction at the intersection of the fiber bundles extending in the main axis direction and the other direction, and the bulge at the intersection is crushed by the shape of the brace. As a result, the strength of the intersection is extremely high and the thickness is thin, so that when buried in embankment, it becomes integrated with the soil and provides sufficient resistance to pulling out. In addition, in this lattice-shaped reinforcing material, the interval between adjacent intersections in the main axis direction is larger than the interval between adjacent intersections in the other direction, so that the fiber bundles in the main axis direction are bent. It is easy to use, does not easily bend and break when buried in embankment and compacted, and blends well with the soil, so when the embankment is compacted, the rolling force is evenly transmitted to the bottom of the reinforcing material. This allows the lower layer of the embankment to be sufficiently compacted and the upper layer of the embankment to be leveled.

[Brief explanation of drawings]

1 to 7 are diagrams showing one embodiment of the present invention, in which FIG. 1 is a perspective view of a lattice-like reinforcing material, and FIG.
FIG. 3 is a cross-sectional view taken along line A-A of the intersection in FIG. 1, FIG. 3 is a cross-sectional view taken along line B-B of the intersection in FIG.
The figure is an explanatory diagram explaining the manufacturing process of the lattice-shaped reinforcing material, Figure 6 is a sectional view of the crossed cross section shown in Figure 2 before press working, and Figure 7 is the cross cross section shown in Figure 3. FIG. 3 is a cross-sectional view before pressing. 8 to 10 are views showing other embodiments of the present invention, in which FIG. 8 is a perspective view of an example in which the thickness of the member in the other direction is increased, and FIG. FIG. 10 is a cross-sectional view of an example of a layered structure, and a perspective view of an example of a seven-layer structure at the intersection. 1... Lattice reinforcement material, 2... Fiber, 2A, 2B... Fiber bundle, 3... Resin material, 4... Intersection, 5. Surface plate, 6. Guide frame, 7. Bin.

Claims (1)

[Claims] A lattice-like reinforcing material used for ground reinforcement, etc., in which one or more fiber bundles in the main axis direction consisting of a plurality of aligned fibers and two or more layers of fiber bundles extending in the other direction are mutually connected. The fiber bundles intersect to form a lattice shape, and the fiber bundles are bound by a resin material, and each fiber bundle located in the outermost layer extends in the other direction at the intersection of the fiber bundles, and A lattice-like reinforcing material characterized in that the bulges of are crushed by press molding, and further, the interval between adjacent intersections in the main axis direction is larger than the interval between adjacent intersections in the other direction. .