JP2000319885A - Reinforcing sheet for civil engineering - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out drainage of moisture in a slope ground without causing clogging by attaching a network body formed of natural fibers, synthetic fibers, or a mixture thereof, to a surface of a sheet-like water absorptive/desorptive basic material formed of a fibrous material such as a non-woven fabric, or inserting the network body into the interior of the basic material, and combining the network body with the basic material in one body. SOLUTION: A network body formed of natural fibers, synthetic fibers, or a mixture thereof is attached to a surface of a non-woven fabric or the like, which is rich in water absorption/ desorption property as a water absorptive/desorptive basic material, or the network body is inserted into the interior of the non-woven fabric, followed by combining the network body with the non-woven fabric in one body. The network body is to sufficiently exhibit its abrasion resistance in earth and sand. When the thus obtained reinforcing sheet 10 for civil engineering is used for executing the slope ground, an end of the reinforcing sheet 10 laid in the first stage, for civil engineering, on a side closer to a baserock 40, is fixed, and a first-stage reinforcing frame 20 is mounted on an external edge of the sheet 10, to thereby fix the edge onto the ground. Next, first-stage soil dressing 30 is carried out so that the external edge of the sheet 10 becomes the interior of the completed slope ground. Further, work of laying a second-stage sheet 10 over the dressed soil 30 is repeatedly carried out over a predetermined number of times.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced sheet for civil engineering, and more particularly to a sheet used to reinforce a slope or a slope such as a cliff.

[0002]

2. Description of the Related Art A new slope will be created at the side of a new road or in a newly constructed area, but protection measures must be taken to prevent the slope from breaking down. In order to prevent occurrence of natural disasters such as debris flows, cliffs and slopes on both sides of the swamp are reinforced. However, protection measures must be taken for the slopes. If these sloping grounds are formed based on strong rock, the protection construction can be performed by means such as concrete spraying. However, in the case of soft ground, as shown in FIG. The slope protection method must be adopted.

In the slope protection method illustrated in FIG. 1, a reinforcing sheet or a metal reinforcing net is laid, and a slope protection frame is installed at the tip of the reinforcing net. The land is formed in between and forms a slope. In this slope protection method, the inner end of the reinforcing net is fixed to the rock and the protective frame is fixed to the outer end of the reinforcing net. Therefore, it is considered that the protection of the slope land can be surely performed.

However, in the conventional method for protecting slopes shown in FIG. 1 as an example, no measures are taken for drainage. When there is
Very soft, containing lots of water and can even collapse. Generally, the reinforcing net connecting the protective frame to the rock side has only the function of flowing water from the upper side to the lower side, and does not actively discharge water to the slope. is there.

[0005] For this reason, for example, Japanese Unexamined Patent Publication No. 1-97715 has proposed a "band drain material for ground improvement". The band-shaped drain material is composed of a synthetic resin hollow thin plate having a width of 150 mm and a thickness of about 10 to 15 mm, and a nonwoven fabric coated on an outer surface of the hollow thin plate. Has a rectangular water passage formed therein, and the water passage is continuous with the nonwoven fabric through a slit-shaped opening.

If the belt-shaped drain material proposed in Japanese Patent Application Laid-Open No. 1-97715 is arranged in place of the reinforcing net shown in FIG. 1, it is considered that moisture in the soil portion can be discharged out of the slope. Can be However, as pointed out in Japanese Utility Model No. 2536755, the upper end opening of the water passage is prevented from being clogged due to the intrusion of sediment into the water passage as pointed out in Japanese Utility Model Registration No. 2536755. It is necessary to cure with polyethylene sheet or tape,
The workability is poor.

[0007] For this reason, the inventor of the present invention has conducted various studies on how to make a sheet having very good workability, not only holding a reinforcing frame for sloping land, but also having a drainage function. And a water-absorbing base material formed into a sheet shape from a fibrous material such as the above, and a reinforced sheet for civil engineering characterized by arranging and integrating synthetic resin strands in the longitudinal direction of the water-absorbing base material. Have already proposed.

[0008] However, when observing the actual landslides such as landslides, it is found that a large amount of rain suddenly penetrates into the landslides on the slopes, and the water in the landslides causes the rainfall. The earth and sand collapses just like riding on a water slider. In other words, the drainage function using the “band-shaped drain material” or “water-absorbing substrate” alone as described above may not be enough to discharge a large amount of water that has permeated the soil in a short time in a short time. Depending on the situation, the sediment lifted by the water may slide down along with the “band-shaped drain material” and the “water-absorbing base material”.

Therefore, the inventor of the present invention has been able to exhibit a sufficient drainage function when there is a normal amount of rainfall, but even if there is a large amount of rainfall in a short time, the slope is not collapsed. As a result of various studies on how to make a reinforced sheet for civil engineering that can prevent it from reaching, it was found that it is good to make effective use of the "earth pressure" itself on the slope. He noticed that it was born and completed the present invention.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an earthwork sheet for sloping land which also has a drainage function. An object of the present invention is to improve the frictional force and make the workability excellent.

That is, the object of the present invention is as follows.
As a matter of course, it is possible to sufficiently hold the reinforcing frame for the sloped land, and it is possible to drain the water in the sloped land without clogging. Another object of the present invention is to provide a reinforced sheet for civil engineering that can sufficiently protect a slope and has very good workability.

[0012]

Means for Solving the Problems In order to solve the above problems, first, means according to the first aspect of the invention will be described with reference numerals used in the embodiments. For civil engineering, natural fibers, synthetic fibers, or reticulated bodies 12a and 12b formed by mixing both are integrated with the surface or inside of a water-absorbing / draining base material 11 formed in a sheet shape from a fibrous material. Reinforcement sheet 10 ".

That is, the reinforcing sheet 10 for civil engineering according to the present invention employs a fibrous material such as a nonwoven fabric which is easy to manufacture and has a high water absorbing and draining property as its water absorbing and draining base material 11.
And, on the surface or inside of this nonwoven fabric, natural fiber, synthetic fiber, which will sufficiently exhibit frictional resistance in earth and sand,
Alternatively, the reticulated body 12a or 1 formed by mixing both
2b is integrated. This reinforced sheet for civil engineering 1
If 0 is composed of only a fibrous material such as a nonwoven fabric, the strength as a civil engineering material may be insufficient,
Although it may be difficult to fix the reinforcing frame 20 as shown in FIG. 1 to the rock 40 side, in the reinforcing sheet for civil engineering 10 of the present invention, each net 12a or 1
2b plays the role of the reinforcement. In addition, since these reticulated bodies 12a and 12b are formed in a fibrous material such as a non-woven fabric or on the surface thereof, they do not impair the water-absorbing and draining properties and the water permeability of the fibrous material itself such as a non-woven fabric. There is no.

The mesh used by the reinforcing sheet for civil engineering 10 is a mesh like a mesh 12a shown in FIGS.
It may be formed by weaving a natural fiber, a synthetic fiber, or a linear body formed by mixing both, and this is the civil engineering reinforced sheet 10 according to claim 2. Also,
The mesh used by the reinforcing sheet 10 for civil engineering is shown in FIG.
As shown in FIG. 1, a net-like body 1 integrally formed of a synthetic resin
2b, which is the civil engineering reinforced sheet 10 according to claim 3.

Further, these nets 12a and 12b
As shown in FIG. 3, it is only necessary to use an adhesive or the like to integrate or bind to the surface side of the water-absorbing and draining base material 11 made of a fibrous material such as a non-woven fabric. The reinforced sheet 10 for civil engineering according to the above can be manufactured very easily. The integration of these nets 12a and 12b on the surface side of the water absorption / drainage base material 11 is performed by chemical bonding using the adhesive, physical bonding by thermocompression bonding, mechanical bonding by knitting or connecting, or Various means such as self-adhesion are employed. The integration of the water-absorbing and draining base material 11 made of a fibrous material such as a nonwoven fabric with the meshes 12a and 12b may be performed by needling. Needling the mesh 12
a · 12b sandwiched in a sandwich shape
The fibers constituting the suction / drainage base material 11 are entangled with the nets 12a and 12b by driving a needle (needle) from the surface of the base material 1.

As shown in FIG. 4A, the mesh members 12a and 12b are integrated with the suction / drainage base material 11 by sandwiching them between the two suction / drainage base materials 11 to form a sandwich. It may be performed by integrating, or as illustrated in FIG. 4 (B), may be performed by being sandwiched and integrated between each of the three suction / drainage substrates 11. In this case, due to the intersections of the meshes 12a and 12b and the existence of the mesh, a sufficient frictional resistance against earth and sand is generated.

As described in detail above, the meshes 12a.
Any material can be used as the material constituting 12b, as long as it can provide resistance to the soil and can secure the strength. Natural fibers, synthetic fibers, or fibers formed by mixing both, and fibers made of these are used. It may be formed by weaving in a shape, and in some cases, a metal wire may be covered with a synthetic resin, rubber, or the like.

When the nets 12a and 12b are made of natural fibers, when the sloping land on which the reinforced sheet for civil engineering 10 is applied is stabilized, most of the lands are not corroded and the natural environment is not destroyed. Of course, when synthetic fibers are employed, it is needless to say that the slope can be protected semipermanently. Also, these fibers are mixed, or a biodegradable material is added as necessary to form a linear body, which is woven into a literal net to form a net 1
2a and 12b may be formed.

Since the water-absorbing / draining base material 11 and the nets 12a and 12b constituting the reinforcing sheet 10 for civil engineering have high flexibility, respectively, the first ground on which this is laid is provided. Needless to say, the following 3
No unevenness (floating from the soil surface) is generated with respect to the upper surface of the zero, and the surface completely conforms to the unevenness of the ground and the surface of the guest soil 30.

Using the above-mentioned reinforced sheet 10 for civil engineering,
In order to construct a slope as shown in FIG. 1, a first-stage civil engineering reinforcing sheet 10 is laid. The reinforced sheet for civil engineering 10 laid at the construction site has its end on the rock 40 side fixed to the rock 40 using the fixing anchor 14 or the like. Also,
The central portion of the civil engineering reinforcing sheet 10 is also fixed on the ground using a fixing tool such as the fixing anchor 14 or a skewer. At this time, the reinforcing sheet for civil engineering 10
Has the flexibility as described above, and therefore completely conforms to the irregularities on the surface of the construction site.

A first-stage reinforcing frame 20 is placed on the outer end of the civil engineering reinforcing sheet 10 and
The reinforcing sheet for civil engineering 10 is inserted into the insertion portion formed inside the reinforced concrete sheet, or the fixing anchor 14 or the like is driven through the reinforcing sheet for civil engineering 10 to fix the reinforcing frame 20 on the ground.

The driving of the fixed anchor 14 or the like is not always necessary depending on the condition of the bedrock 40 or the construction site, and the driving of the fixed anchor 14 may be omitted as shown in FIG. .

Next, the outer end of the civil engineering reinforced sheet 10 is
As shown in FIG. 1, the first stage soil 30 is performed so as to be inside the completed slope. If there is a direct fixing means between the outer end of each civil engineering reinforcing sheet 10 and the reinforcing frame 20, if the outer end of each civil engineering reinforcing sheet 10 is left under each reinforcing frame 20, Since the outer end portion of the water guide passage can be exposed to the slope formed by the surface of each reinforcing frame 20, the drainage of the water on the sloped land can be performed more reliably.

The second-stage civil engineering reinforcing sheet 10 is laid on the first-stage guest soil 30 to perform the above-described operation, and this operation is repeated a predetermined number of times. At this time, since the civil engineering reinforced sheet 10 has sufficient flexibility,
It is completely along the irregularities on the surface of the first stage soil 30. By the above, the reinforced sheet 10 for civil engineering is layered with the soil 30, and the sloped land with the front surface of each reinforcing frame 20 as the surface is completed.

At this time, the reinforcing sheet for civil engineering 10 is shown in FIG.
When the mesh 12a or 12b is integrated with the surface of the water-absorbing / draining base material 11 as shown in the above, a large number of irregularities are formed on the surface side by the mesh of the mesh 12a or 12b. In other words, the frictional force against earth and sand increases due to the unevenness. Further, as shown in FIG. 4A, the reinforced sheet for civil engineering 10
A mesh body 12a or 12b between two suction / drain base materials 11.
Is sandwiched in a sandwich shape, irregularities are formed on the front and back surfaces of each of the water absorbing and draining base materials 11, and the irregularities increase the frictional force against the earth and sand. The same applies to the case shown in b).

When there is rain or the like on the completed sloping land, and water permeates into the soil 30, the water is captured by the reinforced sheets 10 for layers of civil engineering. This is because the basic material constituting each civil engineering reinforced sheet 10 is a water-absorbing and draining substrate 11 formed in a sheet shape from a fibrous material such as a nonwoven fabric. And since each civil engineering reinforced sheet 10 is laid in a substantially horizontal layer shape, water flows in each of the water absorption / drainage base materials 11 and is discharged from the vicinity of each reinforcing frame 20 to the outside of the inclined ground. .

Of course, the fibrous material such as a nonwoven fabric constituting the water absorbing and draining base material 11 is formed by intertwining the fibers in a complicated manner. In addition, there is no hindrance to the permeation of the suction / drainage substrate 11. In addition, since the strand network 12c serves as a guideway for the absorbed water, the drainage action on the sloping ground by the reinforcing sheet for civil engineering 10 is maintained for a long time, and in some cases, semi-permanently. .

On the other hand, if a large amount of heavy rain causes the sloped land to rapidly absorb and drain water, the entire sloped land is softened and
Although the earth pressure is hung on the side, since each reinforcing frame 20 is connected to the rock 40 side through the tough nets 12a and 12b, it can withstand the above earth pressure sufficiently.
And as mentioned above, each civil engineering reinforced sheet 10
Due to the unevenness of the surface of the water absorbing and draining base material 11 formed by the mesh bodies 12a and 12b, the frictional resistance against the upper and lower ground and the earth and sand is high, so that even if the entire slope is softened, This will ensure that the soil is retained. Therefore, the sloping land does not easily collapse even if it suddenly absorbs water.

As described above, if the sloped land repeatedly absorbs water and drains the water through the reinforced sheet for civil engineering 10, a narrow flow path of constant water is formed in the sloped land. Since the water does not flow, the slope 10 is stabilized.

As shown in FIG. 11, a fibrous material such as a nonwoven fabric constituting the water-absorbing / draining base material 11 is formed by spraying a synthetic resin fiber material together with an adhesive onto the surface of the mesh member 12a or 12b. You may make it. This is the civil engineering reinforced sheet 10 according to claim 4. Since the suction / drainage base material 11 configured as described above is also formed by intertwining the fibers in a complicated manner, the soil and sand are not absorbed by the suction / drainage base material 1.
1 and does not impede the permeation of the suction / drainage substrate 11 at all. not only that,
Since the mesh member 12a or 12b serves as a guideway for the absorbed water, the drainage action on the sloping ground by the reinforced sheet for civil engineering 10 is maintained for a long time, and in some cases semipermanently.

In order to solve the above-mentioned problems, means adopted by the invention according to claim 5 is described by attaching reference numerals used in the description of the embodiments described below. Suction and drainage base material 1 formed into a sheet by using materials
1. A reinforced sheet for civil engineering 10 '', comprising: a strand mesh body 12c integrated with the surface or inside of the water absorption / drainage base material 11 and made of synthetic resin and having a knot 13. .

That is, the reinforced sheet for civil engineering 10 according to the fifth aspect of the present invention sufficiently exerts frictional resistance in the soil on the surface or inside of the water-absorbing and draining substrate 11 employing a fibrous material such as a nonwoven fabric. This is an integral structure of the strand net 12c provided with a number of knots 13 to be formed. The strands forming the strand network 12c are
It is a so-called thick thread, literally a "twisted thread" made of synthetic fiber.

The strand net 12c, like the nets 12a and 12b, reinforces the civil engineering reinforcing sheet 10 without impairing the water absorption and drainage of the water absorption and drainage base material 11 itself and water permeability. It plays the role of doing. In addition, the strand network 12c may be integrated when the water-absorbing / water-absorbing substrate 11 made of a fibrous material such as a nonwoven fabric is formed,
Alternatively, the reinforcing sheet for civil engineering 10 according to the fifth aspect of the present invention can be very easily manufactured because the surface of the suction / drainage base material 11 may be integrated using an adhesive or the like. It can also be.

As shown in FIG. 10, the strand net 12c is sandwiched between the two webs 11 to integrate the strand net 12c into a sandwich. It may be done by doing. In this case, due to the presence of each knot 13 of the strand network 12c, as shown in FIG. 10, irregularities are formed on the surface side of the water-absorbing and draining substrate 11 that comes into direct contact with the earth and sand, This unevenness generates sufficient frictional resistance against earth and sand.

That is, as shown in FIG. 8, the reinforced sheet for civil engineering 10 comprising the strand net 12c as a constituent member has the strand net 12c
When the knots 13 are integrated, a large number of irregularities are formed on the surface side by the knot 13 formed in the strand network 12c, and the irregularities increase the frictional force against earth and sand. Is what you can do. As shown in FIG. 10, when the reinforcing sheet for civil engineering 10 is one in which the strand net 12 c is sandwiched between two sheets of the water absorbing and draining base material 11, The irregularities described above are formed on the surface of the material 11, and the irregularities can increase the frictional force against the earth and sand.

The water-absorbing / draining base material 11 and the strand net 12c constituting the reinforced sheet 10 for civil engineering are:
Since each of them has high flexibility, not only the first ground on which they are laid, but also the upper surface of the soil 30 as described below (roughness from the soil surface).
Is not generated, and the surface completely conforms to the unevenness of the ground or the surface of the guest soil 30.

Of course, the reinforcing sheet for civil engineering 10 according to claim 5 is constructed in the same manner as any one of claims 1 to 4 described above, and exhibits the same function as described above. It is.

In order to solve the above-mentioned problems, a means adopted by the invention according to claim 6 is that “a natural or non-woven fabric such as a nonwoven fabric or the like is formed into a sheet shape on the surface or inside thereof. A reinforcing sheet for civil engineering 10 ", wherein a woven fabric 15 formed by mixing fibers, synthetic fibers, or a mixture of both is integrated.

That is, as shown in FIG. 12, the reinforced sheet for civil engineering 10 according to the sixth aspect is provided between two sheets of water-absorbing / draining base material 11 formed of a fibrous material such as a nonwoven fabric.
The woven fabric 15 formed by mixing natural fibers, synthetic fibers, or a mixture of both is integrated, or the upper and lower water-absorbing and draining substrates 11 shown in FIG. And a single piece of woven fabric 15 is integrated.

The woven fabric 15 is literally woven in a cloth shape using yarns made of natural fibers or the like, and corresponds to the mesh member 12a or 12b of the reinforced sheet 10 for civil engineering according to the first to fifth aspects. This woven fabric 15 is woven using natural fibers, such as hemp and jute, which are biodegraded by microorganisms in the soil when the reinforced sheet for civil engineering 10 needs to consider sufficient conservation of the natural environment. It is made of synthetic fiber or a mixture of natural fiber and natural fiber in urgent places and cases such as disaster recovery. The woven fabric 15 may be literally woven in a cloth shape without any gaps, and may be woven in a "net-like" fabric in which a mesh-like gap exists between fibers. It may be carried out.

The woven fabric 15 may be woven using a twisted yarn like a normal cloth, or may be woven using a so-called non-twist yarn. This is the reinforced sheet 10 for civil engineering according to claim 7, but when the woven fabric 15 is woven by untwisted yarn, the yarn to be woven is made flat and has a thickness of, for example, about 1 mm to 2 mm. Is 1/1
The thickness can be reduced to about 0, and a large area as the woven fabric 15 can be secured by a thin and tough material.

As shown in FIG. 12, two wicking base materials 11 may be integrated on both sides of the woven fabric 15, which is a reinforced sheet for civil engineering according to claim 8. It is. In other words, the woven fabric 15 is integrated into the suction / drainage base material 11, and the reinforced sheet 1 for civil engineering according to claim 8.
It is 0.

As a synthetic fiber for weaving the woven fabric 15, polypropylene is suitable, and nylon and Tetron (both are trade names) are also used.

Claims 6 to 8 constructed as described above.
The reinforced sheet for civil engineering 10 according to any one of the above is constructed in the same manner as that of the above-described claims 1 to 5, but the woven fabric 1
5 is used in place of the mesh body 12a or 12b, so that the water absorption and drainage properties of the mesh body 12a and 12b cooperate with those of the water absorption and drainage base material 11 to improve the water absorption and drainage function of the entire reinforced sheet for civil engineering. Instead, the toughness of the woven fabric 15 itself can achieve enhanced protection of the laver surface and the like.

[0045]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a reinforced sheet for civil engineering according to an embodiment of the present invention; FIG. An example is shown in which the sheet 10 is used to reinforce a slope. This civil engineering reinforced sheet 10 is shown in FIG.
As shown in FIG. 7 to FIG. 7, it is composed of a long absorbent base 11 made of a fibrous material such as a nonwoven fabric, and a net 12a or 12b integrated with the base 11. Among the reticulated bodies, the reticulated bodies 12a formed by mixing the natural fibers and the synthetic fibers shown in FIGS.
Is formed by weaving a linear body made of a synthetic resin, for example, as shown in FIG. 6, and the mesh body 12b shown in FIG. 7 is formed by, for example, melting a high-molecular polymer and extruding it from a nozzle. Unstretched plastic mesh. Of course, the plastic mesh may be stretched.

On the other hand, each of the reinforcing sheets 10 for civil engineering shown in FIGS. 8 to 10 is composed of a long absorbent base 11 made of a fibrous material such as a nonwoven fabric, and a strand integrated with the absorbent base 11. And a crossing point of each strand netting 12c having a diameter of about 1 mm to 9 mm.
It is the knot 13 of the degree.

Various fibrous materials can be used as the base material 11, and not only a woven fabric but also a nonwoven fabric can be used. In the present embodiment, a non-woven fabric is mainly used. The material and physical characteristics of each non-woven fabric in each example are as follows.

[0048] Remark 1: According to JIS L-1085 Remark 2: The product is cut into 10 mm square in the width direction. Lay the measurement samples on top of each other, place an aluminum plate of 100 g / 10 cm square on them, and measure the height at two places (eight places in total) on one side. After calculating the average value of the measured eight points, the average value of the thickness per sheet is obtained by further dividing by the number of the superimposed samples.

On the other hand, the reticulated bodies 12a and 12b or the strand reticulated bodies 12c of the embodiment are integrated with the water-absorbing / draining substrate 11 which is a fibrous material such as a nonwoven fabric as described above.
From FIG. 3 or FIG. 4 (A) and (B), or FIG.
Alternatively, as shown in FIG. 10, the base material was integrated with the surface or inside of the base material 11 using an adhesive. Of course, these nets 12a and 12b or strand nets 12c
When the base material 11 is a woven cloth, the base material may be woven into the woven cloth. As shown in FIG. 4 or FIG. As described above, the strand net-like body 12c may be integrated into a sandwich and used.

For the above Examples 1 to 3, the ranges which can withstand the earth pressure applied from the slope side when constructed as shown in FIG. 1 are as follows.

[0051] FIG. 12 shows a reinforced sheet 10 for civil engineering according to claims 6 to 8, wherein the reinforced sheet 10 for civil engineering is formed of two sheets of a water-absorbing and draining base formed of a fibrous material such as a nonwoven fabric. A woven fabric 15 formed of natural fibers, synthetic fibers, or a mixture of both is integrated between materials 11.

The woven fabric 15 is literally woven into a cloth shape by using a thread made of polypropylene, and is woven as a material suitable for an urgent place or a case such as a disaster recovery. The woven fabric 15 of this embodiment is woven using so-called twisted yarn. And this woven cloth 15
Is woven using an untwisted yarn having a width of about 1 mm and a thickness of about 1/10.

[0053]

As described in detail above, in the present invention, as exemplified in the above embodiment, "the surface or inside of the water-absorbing and draining substrate 11 formed in a sheet shape by a fibrous material such as a nonwoven fabric, That the reticulated bodies 12a and 12b formed by mixing natural fibers, synthetic fibers, or a mixture of both are integrated. "
Alternatively, "a sheet 11 made of a fibrous material such as a non-woven fabric or the like and a water absorbing and draining substrate 11 integrated with the surface or inside of the substrate 11 and made of synthetic resin,
And the strand mesh body 12c having the above-mentioned structure), there is a characteristic in its configuration. As a result, it is possible to sufficiently hold the reinforcing frame for the sloped land, and naturally, the drainage of water in the sloped land is clogged. Can be performed without causing any friction, and with sufficient frictional resistance against earth and sand,
The slope can be sufficiently protected against a large amount of infiltration water, and the reinforced sheet 10 for civil engineering with excellent workability can be provided.

The reinforcing sheet 1 for civil engineering according to claim 4
0, regarding the reinforced sheet for civil engineering 10 according to any one of claims 1 to 3, "the net-like body 12a or 1
2b, the synthetic resin fiber material is sprayed together with an adhesive to thereby integrally form the water-absorbing and draining base material 11 ". The same effect as the reinforcing sheet for use 10 can be obtained.
It can be easily integrated on the surface of 2b, and its manufacturing cost can be reduced.

Further, in the invention according to claim 6,
“A woven fabric 15 formed by mixing natural fibers, synthetic fibers, or a mixture of both, is integrated with the surface or inside of the water-absorbing and draining substrate 11 formed in a sheet shape from a fibrous material such as a nonwoven fabric. The reinforced sheet for civil engineering 10 "has a structural feature, and the reinforced sheet for civil engineering 1 according to claim 7.
The reinforced sheet 1 for civil engineering according to claim 6, such as 0.
0, if the woven fabric 15 is characterized by being formed by weaving a non-combustible yarn formed by mixing natural fibers, synthetic fibers, or both, the woven fabric 15 further improves the water absorption and drainage properties. Thus, the reinforced sheet 10 for civil engineering can be provided.

As described in the reinforced sheet 10 for civil engineering according to the eighth aspect, "the water absorbing and draining base material 11 is integrated on both sides of the woven fabric 15". 6 or 7 can exhibit the same effect as the reinforced sheet for civil engineering 10 according to claim 7, and one woven fabric 15
The toughness of each of the two suction / drainage base materials 11 located on both sides of the base material is integrated to make the toughness very high.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state in which a slope is constructed using a civil engineering reinforced sheet according to the present invention.

FIG. 2 is a longitudinal sectional view showing another state in which the sloping land is constructed using the civil engineering reinforced sheet.

FIG. 3 is a partially enlarged cross-sectional view of a civil engineering reinforced sheet according to claims 1 and 2.

FIG. 4 is a partially enlarged cross-sectional view of the reinforcing sheet for civil engineering according to claim 1 and claim 3, wherein (A) shows a case where one net-like body is used, and (B) shows a case where two sheets are used. ing.

FIG. 5 is a partially enlarged plan view of the civil engineering reinforced sheet shown in FIG. 3;

FIG. 6 is a partially enlarged plan view taken along line 1-1 in FIG. 5;

7 is a partially enlarged plan view of the civil engineering reinforced sheet shown in FIG.

FIG. 8 is a partially enlarged sectional view taken along line 2-2 in FIG. 9;

FIG. 9 is a plan view of the civil engineering reinforced sheet.

FIG. 10 is a partially enlarged sectional view corresponding to FIG. 8 showing another embodiment.

FIG. 11 is a partially exploded perspective view showing still another embodiment of the reinforced sheet for civil engineering according to the present invention.

FIG. 12 is a partially exploded perspective view showing still another embodiment of the reinforced sheet for civil engineering according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Reinforcement sheet for civil engineering 11 Substrate for absorbing and draining water 12a and 12b Net-like body 12c Strand net-like body 13 Knot 14 Fixed anchor 15 Woven cloth 20 Reinforcement frame 30 Guest soil 40 Bedrock

Continued on front page F-term (reference) 2D044 CA05 4F100 AJ01B AK01B AK07B AK41A BA02 BA03 BA06 BA07 DC16B DC30B DG01B DG12B DG15A DG15C DG18B EH61B EJ64B GB90 JD15A JD15C JJ07JK01J05J

Claims (8)

[Claims] 1. A net-like body formed by mixing natural fibers, synthetic fibers, or a mixture of both, on the surface or inside of a sheet-shaped water-absorbing and draining substrate formed of a fibrous material such as a nonwoven fabric. And reinforced sheet for civil engineering. 2. The reinforcing sheet for civil engineering according to claim 1, wherein the mesh body is formed by weaving a natural fiber, a synthetic fiber, or a linear material formed by mixing both fibers. . 3. The reinforced sheet for civil engineering according to claim 1, wherein the mesh body is integrally formed of a synthetic resin mesh material. 4. The water-absorbing and draining base material is integrally formed by spraying a synthetic resin fiber material together with an adhesive onto the surface of the net-like body. The reinforced sheet for civil engineering according to any one of the above. 5. A water-absorbing and draining base material formed in a sheet shape from a fibrous material such as a non-woven fabric, and a strand net made of synthetic resin and integrated with a surface of or inside the water-absorbing and draining base material and having a knot. And a reinforced sheet for civil engineering. 6. A woven fabric formed by mixing natural fibers, synthetic fibers, or a mixture of both, on the surface or inside of a sheet-shaped water-absorbing and draining substrate formed of a fibrous material such as a nonwoven fabric. And reinforced sheet for civil engineering. 7. The reinforced sheet for civil engineering according to claim 6, wherein the woven fabric is formed by weaving a non-combustible yarn formed by mixing natural fibers, synthetic fibers, or both. 8. The reinforced sheet for civil engineering according to claim 6, wherein the suction / drainage base material is integrated on both surfaces of the woven fabric.