JPH11241333A - Protective method for ground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve reliability in placing mat members on the ground for protecting the ground by favorably achieving water stopping performance and strength at mat connection parts. SOLUTION: Asphalt mats 10, 10 are disposed to be adjacent to each other to form a mat connection part 30 between the mats 10, wires used for loading the mats 10 are connected to each other by means of fixing members 31, and a wire gauze 32 is disposed on them. Asphalt mastic is placed to cover the connection members 31 and the wire gauze 32 to form a filled layer, thereby a water stopping layer using the wire gauze 32 and elasticity of mastic is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for improving the reliability of a seam of a mat member when laying a mat member on the surface of the ground to protect the ground. And a method of placing asphalt mastic through a reinforcing member.

[0002]

2. Description of the Related Art In order to protect a slope, it has been practiced to spread a thinner asphalt mat than before, and the slope of a dike or the surface of other slopes is eroded by water. To prevent that. Further, in a waste disposal site or the like, a thin rubber mat is laid to prevent rainwater or the like that has passed through the waste from being mixed into the groundwater and contaminating the groundwater. There is a concern that problems may occur in strength and durability. Therefore, in order to improve the reliability of the mat member covering the ground, laying an asphalt mat or providing a surface protection layer similar to asphalt pavement has been performed.

As the ground protection mat, for example,
After impregnating the woven or non-woven fabric with asphalt, the asphalt is covered on the front and back surfaces with a predetermined thickness.
It is known to construct thin sheets of up to 2 cm. In addition, an asphalt mat having a thickness of about 5 cm, which is integrated with a reinforcing woven fabric in the middle in the thickness direction, may be used. In the asphalt mat, when laying on the ground to be protected, in order to prevent gaps from occurring between the mats,
Laying the end of the mat in a state of overlapping by a predetermined width,
2. Description of the Related Art Asphalt or an asphalt-based adhesive is interposed in an overlapped portion to be integrated.

[0004]

However, in the case of the ground protection mat as described above, if the seal at the connection portion of the mat is not perfect or if a force for moving the mat is applied, the mat is not protected. A gap is formed at the seam, which causes problems such as rainwater intrusion and soil flowing through the gap. Further, when the mat is constructed near the water, a protective layer of the mat will be provided both on land and in the water, and in a portion where waves rush, a gap is always formed at a joint portion of the mat. Force acts. Therefore, when the sealing function at the connection portion of the mat cannot be sufficiently exhibited, there is a problem that the soil in the ground is easily scoured by water flowing in and out of the gap. In addition, if a heavy object falls on the mat and receives an impact, a force may be applied to move some of the mats that have been laid. It is conceivable that an abnormal force acts on the seam around the provided mat to form a gap. In any case, since a gap is formed at the mat joint of the protective mat member, the operation of protecting the ground is hindered, and the reliability of the protective mat member is impaired.

[0005] In addition to the use of mats to protect the ground on land as described above, when constructing marine structures such as breakwaters and quays, power plants and other factory facilities located on the coast, etc. In order to protect the seabed from the effects of waves, asphalt mats and rubber mats are laid,
Means that cover the foundation surface and ground are used. When laying the mat member on the surface of the seabed or the surface of a foundation, for example, in an asphalt mat, 5 m × 20 m
The size is about the same. Conventionally, sealing between the mats has been performed, and as the sealing means, means for arranging a sheet member on the lower surface of the connecting portion of the mat, and then filling the gap with asphalt mastic is used. I have.

[0006] However, in the conventional sealing means at the mat connection portion, when the mat is laid in a state where the ends of the mat are overlapped, an extra mat corresponding to the portion where the mats are overlapped is required, and the mat is required to be laid. There is a problem that the installation cost is high. In addition, asphalt mats are very heavy, and the number of manufactured mats increases, which causes a problem that the working period becomes longer. And when laying on the seabed, gaps are easily formed between the mats unless the work of stacking the mats is performed strictly,
The inconvenience that the protection of the ground cannot be performed well is likely to occur.

The present invention solves the problem of mat connection as described above, and provides a means for easily connecting the mat and improving the reliability of the connection portion. The purpose is.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a protection method for protecting a ground by laying mats on the ground. The invention according to claim 1 of the present invention is characterized in that a porous reinforcing member such as a wire mesh is arranged between adjacent mats, and an elastic material is cast so as to wrap the porous reinforcing member. Is formed. The invention according to claim 2 is characterized in that the porous reinforcing member is arranged below the filling layer, and is arranged at a predetermined length on the lower surface of an adjacent mat.

According to a third aspect of the present invention, there is provided a device wherein a connecting member is arranged so as to protrude at predetermined intervals around the mat.
Connecting between adjacent mats using the connection member of the mat, arranging a porous member such as a wire net at the connection portion, and casting a material having elasticity to form a filling layer. Features. According to a fourth aspect of the present invention, a wire rope used for loading and unloading mats is used as the connection member, and the wire ropes are connected to form a connection portion between the mats, and the porous material is formed of a wire mesh. The filling layer is formed by casting an elastic material including the wire net. According to a fifth aspect of the present invention, a wire mesh is used as a reinforcing member of the mat, a part of the wire mesh is provided to protrude around the mat body, and the wire mesh provided to protrude around the mat body is connected. A connection portion is formed.

As described above, a porous reinforcing member such as a wire mesh is disposed at a connection between mats, and then filled with an elastic material to expand and contract the connection between mats. Even if such an action is provided, the filling layer can cope with the expansion and contraction thereof, and the filling layer is not torn by a reinforcing material such as a wire mesh, and no gap is formed between the mats. Also, when connecting the mats using wire ropes used for loading and unloading the mats, even if a force that increases the gap between the mats acts,
It is possible to prevent a gap from being formed in the mat connection portion, and it is possible to satisfactorily exhibit the water stopping effect of the filling layer.

Further, by embedding a member such as a wire net in the filling layer, even if a force for expanding and contracting the mat connection portion is applied, no gap is formed between the mats and the mat is protected. The operation of the mat member can be maintained well. In addition, when a material in which a porous material such as a wire mesh is projected around the mat is used, the work of connecting the mats can be easily performed. By using the reinforcing member as a reinforcing member, a gap can be prevented from being easily generated in response to an external force applied to the mat connection portion.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A ground protection method according to the present invention will be described with reference to the illustrated example. The example shown in FIGS.
The case where the slope of the embankment or the slope is protected by the protective mat member 5 is shown. For example, when the slope 2 of the embankment is protected by the protective mat member 5, a long mat is laid over the ground 3 on the slope 2 and the ground 4 below, and when the range is wide, A large number of mats 6 are arranged side by side, and as shown in FIG. 2, a mat connecting portion 7 is provided between the mats so as to prevent a gap from being generated. A connection method is applied to the mat connection portion 7 so as not to impair the sealing performance of the mat connection portion even when an impact or other force is applied to the mat.

When an asphalt mat is used as the mat, the one configured as shown in FIG. 3 can be used. The asphalt mat 10 has conventionally been used for preventing scouring of the seabed or the like. Alternatively, a mat having the same configuration as that of a mat used for preventing the ground from being sucked out can be used. For example, when the asphalt mat is used to protect the ground on land, a material having a thickness of about 5 cm may be used. Can be done. In the asphalt mat 10 shown in FIG. 3, an internal reinforcing member 13 such as a glass cloth is sandwiched and integrated between the upper and lower asphalt layers 11 and 12, and a wire 14 for cargo handling is provided on the lower surface of the internal reinforcing member. , 14... Are arranged at predetermined intervals. The wire 14 is provided with an eye 16 at an end exposed from the mat body toward the side, and a hook or the like of a crane is engaged with the eye to suspend the mat. The cargo can be handled. Further, the wire 1
4, a fixture 17 made of a sheet metal or the like is arranged,
The wire is held so as not to come out of the asphalt mat.

In addition to the mat shown in FIG. 3, an asphalt mat 10a as shown in FIG. 4 may be used as a ground protection mat. In the asphalt mat 10a, the vertical wires 15, 15... Are also provided in a direction orthogonal to the horizontal wires 14 embedded in the mat.
Are arranged, and the intersection of the vertical and horizontal wires 14 and 15 can be fixed with a fixture or bound by a number line to provide the connecting portion 18. And the vertical wire 1
5 in order to fix and hold in the mat, even when a force is applied to the wire to move the wire in the thickness direction of the mat by embedding the fixtures 17a. A treatment is performed to prevent the wire from tearing the asphalt layer. As shown in FIG. 4, when the wires provided on the asphalt mat are arranged vertically and horizontally, the wires (for example, the horizontal wires 14) used for cargo handling are connected to the vertical wires 15 as described later.
Is used only for connection between mats, it is not necessary to arrange the vertical wires in the entire length direction of the mat, and even if only the horizontal wires are attached to the several wires via the connection portion,
It is also conceivable that it can be used to create seams between mats.

When a protective mat member 5 as shown in FIGS. 1 and 2 is formed by using an asphalt mat as shown in FIGS.
It can be formed as shown in FIGS. As shown in FIGS. 5 and 6, in the mat connection portion 30 constructed to eliminate the gap between the mats, the mats 10 and 10 are arranged with a predetermined gap provided on the ground 1. After that, the connection is made by using a connector 31 such as a turnbuckle via an eye provided at an end of the wire exposed at an end of the mat. As the connection tool 31, besides the turn buckle, it may be bound using a wire or the like. However, as described above, each wire is connected between mats that are separated from each other, Even when a force that moves the mat in the length direction is applied, the protective mat member connected to the mat can integrally resist.

Thereafter, in the mat connection section 30,
A reinforcing member such as a wire mesh 32 is disposed on the wire connection portion, and then asphalt mastic is cast as a material having elasticity, thereby filling the gap and integrating the reinforcing member 32 and the wire to form a mat. Is performed so that a gap is not formed in the hologram. The mat connection part 3
As asphalt mastic to be cast at 0, using a mastic in which fine aggregate is mixed into asphalt so that it can pass through the wire mesh, an adjacent mat is connected to the asphalt mastic by a connecting member, Integrate so that no gap is formed.

Further, in the mat connection section 30,
The wire mesh 32 is used as the internal reinforcing member, and in a combined state of the wires of the wire mesh, a material having the property of expanding and contracting in one of the vertical and horizontal directions and not expanding and contracting in the other can be used. For example, when it is assumed that a force that spreads the gap between mats is applied to the mat connection part, a wire mesh is arranged so that it can follow the expansion and contraction between the mats, and the asphalt mastic also has a large elasticity , It is possible to cope with the assumed power. Then, it is possible to prevent the wire mesh and the asphalt mastic from expanding and contracting integrally with each other in response to a force for expanding or contracting the gap between the mats, thereby preventing cracks or the like from being generated at the mat connection portion.

In the examples shown in FIGS. 5 and 6, a case has been described in which a plurality of mats as shown in FIG. 3 are connected in the lateral direction to form a protective mat member for protecting the ground. On the other hand, when a mat as shown in FIG. 4 is used, a protective mat is formed by arranging a large number of mats connected vertically and horizontally and laying very wide ground in one mat shape. It can be protected by a member. When the protective mat member is formed using the mat shown in FIG. 4,
After arranging a large number of mats vertically and horizontally, the wires of the adjacent mats are connected to each other at a portion around each mat. Then, after arranging a wire mesh so as to cover the connection portion of the wire, it is possible to form a mat connection portion by casting asphalt mastic.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Asphalt mat 20 shown in FIGS.
In addition to the mat shown in FIGS. 3 and 4, an internal reinforcing member 23 such as a glass cloth and a wire netting member 24 are arranged in a superposed manner on the inside of the mat, and an end of the wire netting member 24 is fixed outside the mat body. The length is exposed and provided. Hanging wires 28 are protruded and arranged at predetermined intervals on the surface of the mat 20 and the hanging wires 28 are connected to a hanging frame, so that the mat can be hung horizontally for cargo handling. In addition, in this mat example,
As in the case of the above embodiment, a cargo handling wire may be arranged together with the reinforcing member, and cargo handling may be performed using the wire.

In the mat 20 of this embodiment, the main body buried portion 25 of the wire netting member 24 is arranged between the upper and lower asphalt layers 21 and 22 so as to be integrated with the asphalt layer of the mat main body, and to surround the mat main body. Are formed by exposing the edge protruding portions 26 and 27 to a predetermined length. The mat 20
When creating a mat, a wire mesh member formed to have a size obtained by adding an edge protrusion to the size of the mat body can be arranged, and a wire mesh member exposed from a portion around the mat body forms the mat. After that, it can be constituted by exfoliating from the surrounding portion of the mat and exposing it.

When a protective mat member is formed by using the mat 20 prepared as described above, as shown in FIG. 9, a large number of adjacent mats 20, 20a...
Can be integrated by connecting the edge protrusions exposed around each of the mats. For example, in the example shown, the edge protrusions 2 between the mats
6 and 26c and the edge projections 26a and 26b are connected to each other via a vertical connection 34, and the edge projections 27 and 27a, 27b and 2 are connected using the horizontal connection 34a.
7c can each be connected. When connecting between the mats arranged adjacent to each other by a connecting portion, it is possible to bind with a wire or to use any other binding means. Further, when the mat is configured using the wire mesh member, since the connection portion of each mat is embedded in the asphalt filling material, even if the connection between the wire mesh members is not completely performed, Since the mat is integrated via the asphalt mastic, it is possible to prevent the formation of a gap at the connection portion of the mat.

As shown in FIG. 9, in addition to using a simple wire mesh member connecting means, in this embodiment, mat connecting means as shown in FIGS. 10 and 11 can be used. It is. In the example shown in FIG.
A method in which the edge protruding portions 26 and 26a are arranged in an overlapping state at the connection portions 0 and 20 and the overlapping portions of the wire mesh members are lightly connected by any means, and then the filling layer 35 is cast and integrated. Is used. When this method is used, the method can be applied to a case where mats are arranged with a relatively small gap therebetween, but can also be easily applied to a case where a long edge protrusion is formed. In the example shown in FIG. 11, the edge protruding portions 26 and 26a of the adjacent mats are arranged in an overlapping state, and then another wire mesh 32 is arranged thereon, and each wire mesh is bound with a wire and then filled. The layer 35 can be cast and the edge projection and the wire mesh member can be integrated via the filling layer.

In the mat using the wire mesh member as an internal reinforcing member, a wire mesh using a wire of an arbitrary thickness can be used as the wire mesh member. In addition, a perforated plate member called expanded metal is used. May be used. When a wire mesh is used as a wire mesh member,
The operation of projecting the edge projecting portion from the side portion of the mat can be easily performed, and the large followability can be exhibited with respect to the force in the expansion and contraction direction applied to the mat connecting portion. And
Since the wire mesh is integrated with a filling layer such as asphalt, since the wire mesh and the filling layer can expand and contract integrally, when an external force is applied to the protective mat member, No gap is formed between the mats due to expansion and contraction at the mat connection portions.

In a mat provided with the wire mesh member, when a large force is applied to separate the mats from each other, the mat integrated with the wire mesh member is
A mat can also be constructed by arranging wires as shown in FIGS. In addition, the mats are firmly connected to each other through wires, and the mat connecting portions are filled with a filling layer through the connecting portions of the edge protrusions to be integrated with each other, so that a process for forming no gap is performed. Can be. As the filling layer, an asphalt filler mixed with an aggregate having a size that passes through a mesh of a wire mesh member to be used can be used. It is preferable that the elastic member is configured so as to have a large elasticity even afterward so as to cope with the expansion and contraction effect applied to the mat connection portion.

[0025]

Embodiment 2 The embodiment shown in FIGS. 12 to 14 uses an elastic material without connecting wires or wire nets to gaps 41 generated when laying mats 40 such as asphalt mats. The case where connection is performed using a filling layer is shown. In the example shown in FIG. 12, a wire mesh 45 is arranged in a gap 41 formed between the mats 40,
An elastic filler is cast so as to enclose the mat 5, and both mat sides are connected via the filler. And since the said filling layer 42 is comprised as a layer which has the elasticity which arrange | positioned the wire mesh inside as a reinforcement member, it becomes possible to respond to the expansion and contraction effect | action added to a mat connection part.

In the example shown in FIG. 13, a wire mesh 46 is laid on the ground 1 so as to cover the end of the mat 40 in a predetermined range corresponding to the gap 41 between the mats 40,40. In this embodiment, the mat is laid after the wire netting 46 is arranged so as to correspond to the gap between the mats. When forming the filler, the filler enters the gap between the ground 1 and the mat due to the fluidity of the filler, and the lower additional filler layer 43 is formed over a predetermined range. Therefore, in the filling layer 42, the wire mesh 4
6 is formed around the reinforcing layer.

The example shown in FIG. 14 shows a case where wire meshes 46, 47 are arranged on the upper and lower surfaces of the gaps between the mats 40, 40, and then a filler is cast to form a filler layer 42. ing. In this embodiment, above and below the filling layer provided in the gap between the mats, wire meshes that cover the end portions of the mat in a predetermined range are arranged, and the upper and lower additional packings are wrapped around the wire meshes 46 and 47 inside the filling layer. The layers 43 and 44 are formed integrally.

Therefore, in each of the examples shown in FIGS. 12 to 14, it is possible to form a filling layer combining a filler and a wire mesh in a gap between mats without using means for directly connecting the mats. it can. And
With the configuration as described above, sufficient reliability can be given to an impact or other external force applied to the protective mat member. As the filler, for the asphalt mat, an asphalt-based material is used.However, a material having a large fluidity of the asphalt mastic can be used, or another material that can be adhered to asphalt can be used. The elasticity of the material in the filling layer can be set to an arbitrary value.

Although the embodiments of the present invention have been described on the assumption that the ground is protected on land such as protection of a slope, etc., the ground is protected by the mat on the seabed. It is also applicable to. That is, to spread the asphalt mat on the seabed ground to prevent scouring of the ground due to waves or the like is a technical means generally employed conventionally. Therefore, when the asphalt mat shown in the embodiment of the present invention is used for protection of the seabed and prevention of scouring, as in the case of land, the mats are spread, and the mat connection portion between the mats is used. The connection can be performed by connecting the wire or the edge protruding portion, arranging a wire mesh at the connection portion, and then filling the filling layer.

Further, as a material having elasticity to be filled in the filling layer, an epoxy resin mortar can be used, and even when the resin is used, it can be constructed underwater. As the epoxy resin, a resin obtained by mixing an aggregate and the like in a two-liquid resin is used.
Since the resin material has a relatively small specific gravity,
As it has almost the same specific gravity as asphalt mastic,
A mixture of aggregates having a large specific gravity at a predetermined ratio is used. Depending on the selection of the resin, a resin that can exhibit elasticity even after curing can be manufactured. Further, when the resin as described above is used as the filling layer, the elasticity is small as compared with the case where asphalt is used as the filling layer. Therefore, as shown in FIGS. When applied to a connection that exerts an action that does not spread
The effect of the filler can be exhibited. When the filler may be a hardened body, polymer concrete may be used. As the resin, for example, “polymortar” (trade name) sold by Kowa Kasei can be used.

[0031]

The ground protection method according to the present invention is constructed as described above. After a porous reinforcing member such as a wire mesh is disposed at the connection between mats, the elastic body is protected. Even if the filling of the material gives the effect of expanding and contracting the connection between the mats, the filling layer can cope with the expansion and contraction, and the filling layer is torn by a reinforcing material such as a wire mesh. No gaps are formed between the mats. Also, in the case of connecting the mats using a wire rope used for loading and unloading the mats, it is possible to prevent a gap from being formed in the mat connection portion even when a force for expanding the gap between the mats is applied, The water blocking effect of the packed bed can be exhibited well.

Further, by embedding a member such as a wire mesh inside the filling layer, even when a force for expanding and contracting the mat connection portion is applied, no gap is formed between the mats and the mat is protected. The operation of the mat member can be maintained well. In addition, when a material in which a porous material such as a wire mesh is projected around the mat is used, the work of connecting the mats can be easily performed. By using the reinforcing member as a reinforcing member, a gap can be prevented from being easily generated in response to an external force applied to the mat connection portion. Then, even when a force that locally separates the mat acts on the protective mat member, the entire mat of the protective mat member exerts resistance, and a gap is formed at the mat connection portion, and the waterproofness is reduced. Can be prevented from occurring.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a protective mat member used for protecting a slope.

FIG. 2 is an explanatory diagram of an arrangement state of a mat used in FIG. 1;

FIG. 3 is an explanatory diagram showing a configuration of an asphalt mat that can be used in the present invention.

FIG. 4 is an explanatory diagram of a configuration of another embodiment of an asphalt mat.

FIG. 5 is a plan view showing a configuration of a mat connection portion.

FIG. 6 is a cross-sectional view of the mat connection portion of FIG.

FIG. 7 is an explanatory view of another embodiment of the mat of the present invention.

FIG. 8 is a sectional view of the mat of FIG. 7;

FIG. 9 is an explanatory diagram in the case where the mat of FIG. 7 is laid to form a protective mat member.

FIG. 10 is an explanatory diagram of a connection portion of the mat of FIG. 7;

FIG. 11 is an explanatory diagram of another embodiment of the mat connection portion.

FIG. 12 is an explanatory diagram of an example of forming a filling layer by arranging a wire mesh in a mat gap.

FIG. 13 is an explanatory diagram of an example in which a wire mesh is arranged below a mat gap to form a filling layer.

FIG. 14 is an explanatory diagram of an example in which a wire mesh is arranged above and below a mat gap to form a filling layer.

[Explanation of symbols]

1 ground, 2 slopes, 5 protection mat member, 7 mat connection part, 10.20 asphalt mat, 13 internal reinforcing layer, 14.15 wire, 24 wire mesh member, 26.27 edge protrusion,
28 hanging wire, 31 fixture, 32 wire mesh,
33 connection part, 35 filling layer, 41 gap, 42 filling layer, 45 wire mesh.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tatsuki Waki 1-2-29-4 Tsurugamine, Asahi-ku, Yokohama-shi, Kanagawa Prefecture Inside World Engineering Co., Ltd. (72) Inventor Mitsuru Nonotada 2--11 Tamagawa, Ota-ku, Tokyo No. 20 Japan Road Co., Ltd. (72) Inventor Takahiko Ito 3-13-1 Kyobashi, Chuo-ku, Tokyo Taisei Rotec Co., Ltd. (72) Inventor Katsuo Matsuzaki 2-10-9 Akasaka, Minato-ku, Tokyo Japan Marine Construction Co., Ltd. (72) Inventor Yuzo Kogami 2-10-9, Akasaka, Minato-ku, Tokyo Nihon Marine Construction Co., Ltd. (72) Inventor Hiroshi Nakano 2- 10-9 Akasaka, Minato-ku, Tokyo Nihonkai Construction Inside the corporation

Claims (5)

[Claims] 1. A protection method for protecting a ground by laying mats on the ground, wherein a porous reinforcing member such as a wire mesh is arranged between adjacent mats, and the porous reinforcing member is wrapped. A method for protecting a ground, characterized in that a filling layer is formed by casting an elastic material. 2. The ground protection method according to claim 1, wherein the porous reinforcing member is disposed at a lower portion of the filling layer, and is disposed at a predetermined length on a lower surface of an adjacent mat. 3. A protection method in which a mat is spread over the ground to protect the ground, wherein a connection member is arranged so as to protrude at predetermined intervals around the mat, and a mat is used. And a mat between adjacent mats, a porous member such as a wire mesh is arranged at the connection portion, and a filling layer is formed by casting an elastic material. . 4. A wire rope used for cargo handling of a mat is used as the connection member, the wire rope is connected to form a connection between the mats, and a porous material is formed of a wire mesh. The ground protection method according to claim 3, wherein the filling layer is formed by casting an elastic material including the wire net. 5. A wire mesh is used as a reinforcing member of the mat, a part of the wire mesh is provided so as to protrude around the mat body, and a wire mesh provided so as to protrude around the mat body is connected. The ground protection method according to claim 3, wherein the ground is formed.