JPH0381411A - Ground reinforcing compound reinforcement material - Google Patents

Abstract

PURPOSE:To improve workability for banking and make it possible to effectively drain water in the banking by providing high anticorrosive nonwoven fabric to a lattice like reinforcement member and regulating movement of sediment between respective reinforcement members in the ground to be reinforced. CONSTITUTION:A fiber bundle 4A more than one layer in the main axial direction and fiber bundles 4B more than two layers extending in the other direction are made to cross to each other for forming in like a lattice, the most external layer on the crossing part 6 is made so as to be the fiber bundles 4B in the other direction, a swelling on the crossing part 6 is crushed by press forming and a lattice like reinforcement member 2 is formed. A sheet of nonwoven fabric 3 consisting of synthetic resin is pinched into the lattice like reinforcement members 2 and a ground reinforcing compound reinforcement material 1 is constituted. Further, the ground reinforcing compound reinforcement material 1 is layed on the ground, sediment is piled up over the same for executing banking layer, and this process is repeated over again. It is possible thereby to execute strong banking in a short period and low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a composite reinforcing material for ground reinforcement suitable for use in reinforcing earth, particularly reinforcing embankments.

"Prior Art" Conventionally, when constructing an embankment, various reinforcing measures have been applied to prevent landslides and skidding.

An example of such reinforcing means is a method of burying nonwoven fabric in layers in the embankment to be constructed.

This reinforcing means is carried out by laying a plurality of strip-shaped nonwoven fabrics on the surface of the earth and sand each time the earth and sand constituting the embankment are appropriately heaped up.

In this case, each time the earth and sand is piled up, a belt-shaped nonwoven fabric is laid on the surface of the mound, and adjacent nonwoven fabrics are sewn together to cover the earth and sand.

Then, more earth and sand is piled up on top of the sewn non-woven fabric, the non-woven fabric is laid on the surface of this earth and sand, and the embankment is constructed by repeating this process, and the whole is buried in layers in the embankment. .

On the other hand, in addition to nonwoven fabrics, high-strength continuous fibers are also being introduced as effective reinforcing means for embankments. This high-strength continuous fiber has fiber bundles made of a plurality of aligned fibers crossing each other to form a lattice shape, each fiber of the fiber bundles being bound with a resin material, and 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.

The purpose of this reinforcing means using reinforcing materials is to bury, for example, a grid-shaped reinforcing material in layers in the embankment, and to stabilize the embankment by utilizing the pull-out resistance of the reinforcing material.

``Problems to be Solved by the Invention'' However, if only nonwoven fabric is used as a means of reinforcing embankments, ground, etc., a process of sewing together the nonwoven fabric is required, which causes a delay in work.

In addition, if a method of reinforcing the ground is performed using only a lattice-shaped reinforcing member made of high-strength continuous fibers, there is a risk that the earth and sand will move through the mesh of the lattice-like reinforcing member, leading to fluidization of the earth and sand. In addition, due to the structure of this reinforcing material, it is relatively thick at about 2 mm, so
When buried in the soil as a reinforcing material for embankment, it does not blend well with the soil and has poor workability, and the reinforcing material is hard and rigid, making it difficult to bend, so when the embankment is compacted, the rolling force will be reduced. is not transmitted evenly under the reinforcement, and as a result, the lower layer of the embankment may not be sufficiently compacted, the upper layer of the embankment may not be leveled flat, and the rolling force may not be concentrated in one place. There was also a risk of damage due to concentration.

Therefore, the present invention aims to create a foundation that has good embankment workability, high strength, can eliminate fluidization of earth and sand in the ground to be reinforced, and can effectively drain water in the embankment. The purpose is to provide a composite reinforcement material for reinforcement.

"Means for Solving the Problems" A first aspect of the composite reinforcing material for ground reinforcement of the present invention includes a lattice-shaped reinforcing member formed in a lattice shape by fiber bundles mainly composed of high-strength continuous fibers, and a highly corrosion-resistant The lattice-like reinforcing member is made of a nonwoven fabric in which 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 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. is crushed by press molding, and furthermore, the interval between adjacent intersections in the main axis direction is larger than the interval between adjacent intersections in the other direction, and the lattice-shaped reinforcing member is It is characterized in that it is provided on both sides of the nonwoven fabric.

Further, in a second aspect of the present invention, fiber bundles mainly composed of high-strength continuous fibers are formed in a lattice shape; It is characterized by

Further, in a third aspect of the present invention, a substantially belt-shaped nonwoven fabric is formed along the main axis direction or the other direction on the surface of a lattice-shaped reinforcing member formed in a lattice shape by fiber bundles mainly consisting of high-strength continuous fibers. It is characterized by the fact that it is provided.

"Function" In the composite reinforcing material for ground reinforcement of the present invention, the movement of earth and sand in the ground to be reinforced between each reinforcing material is regulated by the nonwoven fabric provided in the lattice-like reinforcing member. In addition, the lattice-shaped reinforcing member has a lattice-like structure in which one or more layers of fiber bundles in the main axis direction, which are made up of a plurality of fibers that are aligned and overlapped, and two or more layers of fiber bundles that extend in the other direction intersect with each other. None, 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 the bulge at the intersection is formed by press molding. By being crushed, the strength of the intersection is extremely high, and the thickness is thin, so when it is buried in embankment, it integrates with the soil and provides sufficient pull-out resistance. .

In this composite reinforcement material for ground reinforcement, the distance between adjacent intersections in the main axis direction is larger than the distance between adjacent intersections in the other direction, so that The fiber bundles are easy to bend and do not easily bend or break when buried in embankment and compacted, and blend well with the soil.
When the embankment is compacted, the rolling force is evenly transmitted to the bottom of the reinforcing material, which allows the lower layer of the embankment to be sufficiently compacted and the upper layer of the embankment to be leveled.

Furthermore, in the case of structures in which lattice-shaped reinforcing members are provided on both sides of the non-woven fabric, or non-woven fabrics are provided in part of the lattice-shaped reinforcing members, the lattice-shaped reinforcing members come into direct contact with the earth and sand. , the lattice-like reinforcing member effectively restrains the earth and sand.

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

1 to 7 show a first embodiment of the present invention,
Reference numeral 1 in the figure is a composite reinforcing material for ground reinforcement that is buried in layers in the embankment to stabilize the embankment.
As shown in Figures (a) and (b), it consists of a lattice-shaped reinforcing member 2 formed in a lattice shape from fiber bundles mainly consisting of high-strength continuous fibers, and a highly corrosion-resistant nonwoven fabric 3. Here, FIG. 1(B) is a sectional view taken along the line A-A in FIG. 1(A).

The lattice-shaped reinforcing member 2 includes a fiber bundle 4A in the main axis direction consisting of a large number of aligned fibers 4, and fiber bundles 4B, 4B having the same structure, which intersect with each other to form a lattice shape. 4A and fiber bundles 4B are bound together by a resin material 5, and this lattice-like reinforcing member is provided on both sides of the nonwoven fabric 3 to form a composite reinforcing material 1 for ground reinforcement.

Next, the lattice-shaped reinforcing member 2 will be explained in detail. As shown in FIGS. 2 and 3, the intersection 6 between the fiber bundle 4A and the fiber bundles 4B, 4B is formed by connecting the fiber bundle 4A extending in the main axis direction and the fiber bundle 4A extending in the other direction orthogonal to the main axis direction. existing fiber bundle 4B
, 4B are laminated, and the outermost layer at the intersection 6 is the fiber bundle 4B, 4 in the other direction.
B, and the bulges of the intersections 6 are crushed by press molding, and the intervals between the adjacent intersections 6.6 in the main axis direction are equal to the distances between the adjacent intersections 6. It is larger than the interval between 6 and 6.

As the fibers 4 that form the main body of this lattice-shaped reinforcing member 2, glass fibers, carbon fibers, aramid fibers, etc., which are lightweight and have high strength, are mainly used, and other fibers such as synthetic resin fibers may be used as necessary. , ceramic fiber,
A suitable combination of metal fibers and the like is used.

Further, as the resin material 5, for example, vinyl ester resin, which has good adhesiveness to the fibers 4 and has sufficient strength properties itself, is mainly used.
Depending on the type of fiber 4, unsaturated polyester resin, epoxy resin, phenol/silica resin, etc. are used.

Regarding the ratio of these fibers 4 and resin material 5, the fiber 4
It is determined as appropriate by considering the type and strength of the second reinforcing member 2, and the usage pattern of the second reinforcing member 2. For example, if the fiber 4 is glass fiber and the resin material 5 is vinyl ester resin, the fiber 4 has a volume ratio of 30. It is desirable to consider it so that it is about 70%, or about 20 to 60% when the fiber 4 is, for example, pitch-based carbon fiber. If the proportion of fibers 4 is below the above, the strength of this reinforcing member 2 will be significantly reduced.On the other hand, if the proportion of fibers 4 is increased, a reinforcing member 2 with a correspondingly higher strength can be obtained, but if the proportion is too high, Molding becomes difficult, which is not preferable.

The lattice-shaped reinforcing member 2 having such a structure can be manufactured using, for example, the apparatus shown in FIG. 4.

In the same figure, reference numeral 15 indicates a surface plate, 16 indicates a guide frame provided around the surface plate 15, and 17 indicates bins provided side by side on the outer surface of the surface plate, each corresponding to a horizontal component and a vertical component of the reinforcing member 2. It is. Regarding the manufacturing method, continuous fibers impregnated with resin are sequentially hooked in the corresponding bottles 17 in the vertical and horizontal directions in a so-called brush stroke manner, and the intersections 6
Then, make sure that the fiber bundles 4A and 4B overlap alternately.

FIG. 5 shows an example of the method of laminating the intersections, and the fiber bundles 4A, 4B, 4B, which are formed by impregnating a large number of fibers 4 with a resin material, are shown in the arrows in the figure. By passing the fiber bundles 4A in the order of the numbered numbers ■ to
, 4B, and are stacked so that each intersection 6 has a cross-sectional shape as shown in FIGS. 6 and 7. After doing this, the resin material 5 of each layer is pressed to reduce its thickness before it hardens, thereby crushing the intersections 6 in particular and forming the three-layer structure shown in FIGS. 2 and 3. It is formed into a cross-sectional shape of a layered structure, and is formed into a rectangular lattice shape having almost the same thickness as a whole with almost no steps.

Then, a nonwoven fabric 3 made of synthetic fibers such as vinylon and nylon is sandwiched between the lattice-shaped reinforcing members 2 formed in a lattice shape to form a composite reinforcing material 1 for ground reinforcement.

When providing the nonwoven fabric 3 on the lattice-shaped reinforcing member 2, the non-woven fabric 3 may be attached with an adhesive after the press working is completed, or the adhesive force of the resin material 5 may be applied before the lattice-shaped reinforcing member 2 is completely cured. It may also be pasted using. Alternatively, the fiber bundle may be provided so as to be sandwiched between fiber bundles stacked in multiple layers so as to be integrated as a whole.

Next, an example of the use of this composite reinforcing material 1 for ground reinforcement will be described.

First, the composite reinforcing material 1 for ground reinforcement of this embodiment is laid on the ground where the embankment is to be constructed. Then, one layer of embankment is constructed by heaping earth and sand on top of this composite reinforcing material l for the ground.

Furthermore, a composite reinforcement material 1 for ground reinforcement is laid so as to cover the top of this embankment layer.

After the composite reinforcing material 1 for ground reinforcement is laid, earth and sand is further piled up on top of the composite reinforcing material 1 for ground reinforcement to construct one layer of embankment.

Repeat this process, and finally pile up the earth and sand.
Complete the work by constructing the embankment. The interval at which the composite reinforcing material 1 for ground reinforcement is laid is arbitrarily determined each time, and may be formed in several layers. Moreover, it is preferable to similarly lay the composite reinforcement material 1 for ground reinforcement on the surface of the embankment that has been constructed.

In the embankment constructed by such a process, the composite reinforcing material l for ground reinforcement is always laid between the earth and sand, so that the embankment is stable in terms of strength.

That is, since the composite reinforcement material 1 for ground reinforcement placed in this embankment is formed in a lattice shape using high-strength continuous fibers, the force when the embankment slides is absorbed by the shear displacement resistance of the reinforcement material. You can also eliminate the interlock effect:! f! : (Effect of increasing the shear strength as the earth and sand and the composite reinforcement material 1 for ground reinforcement try to move together), it is possible to increase the shear strength of the earth and sand and prevent landslides during construction and after the construction of the embankment. and,
Since the lattice-shaped reinforcing members 2.2 are provided on both sides of the nonwoven fabric 3, they are always in contact with the ground and can hold the ground particularly effectively, so that the interlocking effect can be improved.

Also, this composite reinforcing material 1 for ground reinforcement has a nonwoven fabric 3 made of vinylon, nylon, etc. attached to its surface, so when used for reinforcing embankments, it effectively prevents the fluidization of earth and sand. In addition, water in the embankment can be drained through the nonwoven fabric 3, so that consolidation of the embankment can be successively promoted.

Furthermore, if the lattice-shaped reinforcing member and the non-woven fabric are integrated in advance before reinforcing the ground, etc., it is not necessary to attach the lattice-shaped reinforcing member and the non-woven fabric on-site, thereby shortening the work process. I can do it.

Furthermore, since the conventional work of sewing adjacent nonwoven fabrics one by one can be omitted, it is possible to shorten the work process, thereby shortening the construction period and reducing the construction cost.

Next, a second embodiment of the composite reinforcing material for ground reinforcement of the present invention will be described with reference to FIG. In this embodiment, parts having the same configuration as those in the previous embodiment are given the same reference numerals, and the explanation thereof will be omitted.

The composite reinforcing material 10 for ground reinforcement of this embodiment is one in which a nonwoven fabric 3 is provided so as to cover a part of the surface of a lattice-like reinforcing member 2, and the reinforcing material shown in FIGS. 8(a) and 8(b) In material 10,
A strip-shaped nonwoven fabric 3 is provided along the main axis direction and other directions of the lattice-shaped reinforcing member 2. Here, Fig. 8 (a)
is a perspective view of the reinforcing material 10, and FIG. 8(B) is the same figure (A).
FIG.

Then, the nonwoven fabric 3 provided along the main axis direction of the lattice-like reinforcing member 2 is placed on one side of the lattice-like reinforcing member 2, and the nonwoven fabric 3 provided along the other direction is placed on the other side of the lattice-like reinforcing member 2. Each has its own configuration. Alternatively, as shown in FIG. 8(C), a structure may be adopted in which the nonwoven fabrics 3 provided along the main axis direction of the lattice-like reinforcing member 2 and the other directions are provided on one side of the lattice-like reinforcing member 2, respectively. .

The composite reinforcing material 10 for ground reinforcement of this embodiment can also provide the same effects as those of the embodiments described above.

Furthermore, it is possible to save the nonwoven fabric 3, and when it is used for reinforcing an embankment, water in the embankment can be effectively drained. That is, the portion of the lattice-shaped reinforcing member 2 in contact with the earth and sand restrains the earth and sand, and the portion where the nonwoven fabric 3 is provided collects and drains water within the embankment. In this way, the non-woven fabric 3
Instead of draining all at once, the pore water contained in each embankment layer can be drained uniformly by letting a certain amount of pore water escape to the lower embankment layer.

Note that the details of the composite reinforcing material io for ground reinforcement of this embodiment are not limited to those described above, and, for example, nonwoven fabric may be provided in a lattice pattern or in a checkered pattern. In this case, not only can the nonwoven fabric be saved, but also the interlocking effect on the ground can be adjusted by changing the arrangement of the nonwoven fabric.

Next, a third embodiment of the present invention will be described with reference to FIG. In this embodiment, parts having the same configuration as those in the previous embodiment are given the same reference numerals, and the explanation thereof will be omitted.

The composite reinforcing material 11 for ground reinforcement of this embodiment is attached to the nonwoven fabric 3 along the main axis direction of the lattice-like reinforcing member 2 or in other directions.
In the reinforcing material 11 shown in FIGS. 9(a) and 9(b), the nonwoven fabric 3 is provided on the surface of the lattice-like reinforcing member 2 along its main axis direction. Also, Figure 9 (
As shown in c), a configuration may be adopted in which strip-shaped nonwoven fabrics 3 are alternately provided on both surfaces of the lattice-shaped reinforcing member 2 along the main axis direction.

When using the composite reinforcement material 11 for ground reinforcement of this example,
The extending direction of the nonwoven fabric is made to intersect each layer of the embankment. In this way, by crossing the extending direction of the nonwoven fabric, water in the embankment is drained along the width direction and the longitudinal direction of the embankment.

According to the composite reinforcing material 11 for ground reinforcement of this embodiment, it is possible to achieve the same effects as those of the embodiments described above, and furthermore, by draining moisture in the embankment along the width direction and longitudinal direction of the embankment, , it is possible to uniformly and efficiently drain pore water existing in the embankment.

Note that the details of the composite reinforcing material for ground reinforcement of the present invention are not limited to the above embodiments, and various modifications are possible. For example, as shown in FIG. 1, the lattice-shaped reinforcing member 2 of the above embodiment is formed into a rectangular lattice shape with almost no steps and approximately the same thickness as a whole by bush molding. As shown in FIG. 10, the thickness of the intersection 6 is set to
It is also possible to perform press molding so that the thickness of the member made of fiber bundle 4A in the main axis direction is the same as that of the member made of fiber bundle 4A in the other direction, and to make the thickness of the member made of fiber bundle 4A in the main axis direction thinner than this.

In this case, for example, when constructing an embankment and forming a wall by rolling in the embankment materials,
It is possible to increase the pull-out resistance acting toward the outside of the embankment.

In addition, in the lattice-shaped reinforcing member 2 of this embodiment, the fiber bundle 4A in the main axis direction is made of one layer, the fiber bundle 4B in the other direction is made of two layers, and the intersection part 6 has a three-layer structure. In the composite reinforcing material 1, the intersection 6 may have a five-layer structure as shown in FIG. 11, or the intersection 6 may have an upper layer structure as shown in FIG. It is sufficient that the outermost layer of No. 6 is the fiber bundle 4B in the other direction.

"Effects of the Invention" The composite reinforcing material for ground reinforcement of the present invention consists of a lattice-shaped reinforcing member formed in a lattice shape by fiber bundles mainly consisting of high-strength continuous fibers, and a highly corrosion-resistant nonwoven fabric. The reinforcing member is arranged so that one or more fiber bundles in the main axis direction and two or more layers of fiber bundles extending in the other direction cross each other to form a lattice shape. The 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 collapsed by press molding. Further, the interval between adjacent intersections in the main axis direction is larger than the interval between adjacent intersections in the other direction, and the lattice-like reinforcing member is formed on both sides of the nonwoven fabric. Because of this structure, the force when the ground to be reinforced can slip can be eliminated by the shear displacement resistance of the reinforcing material. This effect increases the shear strength of the earth and sand and prevents landslides during construction and after embankment construction. And, the lattice-shaped reinforcing member is
Since it is provided on both sides of the nonwoven fabric, it is always in contact with the ground and can hold the ground particularly effectively, thereby improving the interlock effect.

Furthermore, if the lattice-shaped reinforcing member and the non-woven fabric are integrated in advance before reinforcing the ground etc., it is not necessary to attach the lattice-shaped reinforcing member and the non-woven fabric on-site, thereby shortening the work process. I can do it. Furthermore, since the work of sewing adjacent nonwoven fabrics one by one can be omitted, it is possible to shorten the work process, thereby shortening the construction period and reducing the construction cost.

The non-woven fabric is provided on the surface of the lattice-shaped reinforcing member, which is formed in a lattice-like shape by fiber bundles mainly composed of high-strength continuous fibers, so that the non-woven fabric covers the lower part of the reinforcing member, which saves on non-woven fabric. In addition, when used for reinforcing an embankment, moisture in the embankment can be effectively drained. That is, the portion of the lattice-shaped reinforcing member in contact with the earth and sand restrains the earth and sand, and the portion provided with the nonwoven fabric collects and drains water within the embankment. In this way, the pore water contained in each embankment layer is drained by releasing a certain amount of pore water to the lower embankment layer, rather than draining the pore water contained in the embankment layer in the − layer all at once using the nonwoven fabric. Can be drained evenly.

In addition, since the structure is such that a substantially belt-shaped nonwoven fabric is provided along the main axis direction or the other direction on the surface of the lattice-shaped reinforcing member formed in a lattice shape by fiber bundles mainly composed of high-strength continuous fibers, Furthermore, by draining water in the embankment along the width and length directions of the embankment, pore water and the like existing within the embankment can be drained uniformly and efficiently.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the first embodiment of the present invention, Figs. 2 and 3 are side sectional views of the intersection of the lattice-shaped reinforcing member, and Figs. 4 and 5 show the creation of the lattice-shaped reinforcing member. FIGS. 6 and 7 are cross-sectional views showing the laminated structure of the intersections of the lattice-like reinforcing members, and FIGS. FIG. 8(a) is a perspective view, and FIG. 8(b) and FIG. 8(c) are diagrams showing the embodiment.
9(a) to 9(c) are views showing the third embodiment of the present invention, and FIG. 9(a) is a perspective view, and FIG. ) and Figure 9 (c) are C in the same figure (a).
-C arrow sectional view, Fig. 10 is a perspective view of an example in which the thickness of the member in the other direction of the lattice-like reinforcing member is thickened, Fig. 11 is a sectional view of an example in which the intersection portion is made of five layers, Fig. 12 is a sectional view of an example in which the intersection is placed on the upper layer. 1.1 2 ... 3 ... 4 ... 5 ... 0511 ... Composite reinforcement material for ground reinforcement, ...
Lattice reinforcing member, ... non-woven fabric, ... fiber, ... resin material.

Claims (3)

[Claims] (1) Composite reinforcing material for ground reinforcement used for ground reinforcement, etc., consisting of a lattice-shaped reinforcing member formed in a lattice shape from fiber bundles mainly consisting of high-strength continuous fibers, and a highly corrosion-resistant nonwoven fabric. , the lattice-shaped reinforcing member has a lattice-like structure in which one or more layers of fiber bundles in the main axis direction and two or more layers of fiber bundles extending in the other direction, which are made of a plurality of aligned fibers, intersect with each other. , these 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 the bulge at the intersection is crushed by press molding. and further formed such that the interval between adjacent intersections in the main axis direction is larger than the interval between adjacent intersections in the other direction,
A composite reinforcing material for ground reinforcement, characterized in that the lattice-shaped reinforcing member is provided on both sides of the nonwoven fabric. (2) A composite for ground reinforcement, characterized in that a nonwoven fabric is provided on the surface of a lattice-shaped reinforcing member formed in a lattice-like shape by fiber bundles mainly consisting of high-strength continuous fibers, so as to partially cover the surface of the lattice-shaped reinforcing member. Reinforcement material. (3) A substantially belt-shaped nonwoven fabric is provided along the main axis direction or the other direction on the surface of the lattice-shaped reinforcing member formed in a lattice shape by fiber bundles mainly composed of high-strength continuous fibers. A composite reinforcement material for ground reinforcement.