JP2005139708A - Civil engineering protective mat and revetment work method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a civil engineering protective mat and a revetment work method using the protective mat, easy in construction, causing no corrosion and settlement, capable of revetment over a long period by holding a natural scenery, safe in suspension, and easy in accurate laying. <P>SOLUTION: This civil engineering protective mat is characterized by inserting and fixing a joining piece having a collar part in a head part into and to a recessed fitting part via a mat-like body, by joining a plurality of massive stone materials bored with the recessed fitting part fittable with the joining piece, and the mat-like body woven by a uniaxially oriented thermoplastic synthetic resin filament body having fineness of 1,000 to 7,000 dt, capable of inserting the joining body and forming a cylindrical part capable of inserting a rigid bar-shaped body into one side of at least an edge part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a protection mat for civil engineering and a revetment construction method suitable for slope protection of embankments, riverbanks, etc., and more specifically, without corrosion, can maintain a natural landscape, and protects the slope for a long time. The present invention relates to a civil engineering protection mat that can be safely and accurately laid, and a revetment method using the same.

  Conventionally, for cutting slopes, coastline revetments, rivers, marsh lakes and other revetments and embankment protection, gabion or futon fences are formed by using a metal wire to form a gabion or futon fence. It has been practiced to fill it with cobblestones. However, filling the gabion or futon bowl with heavy cobblestones is time consuming and is an impediment to improving the efficiency of construction.

  In addition, because of the use of metal wires, the shoreline, hot springs, etc. are immersed in water containing electrolytes, so the rust and corrosion of the metal wires are fast, and the surroundings are contaminated and the aesthetics are impaired. The durability was limited due to the decrease in mechanical strength and wear. Moreover, since the metal wire is exposed on the surface, there is a problem that damages the natural scenery.

  As a revetment construction method that does not impair the natural landscape and avoids the work of filling cobblestones, a number of cobblestones are used by using fittings on flat mesh bodies such as lacquered nets and turtle shell nets instead of gabion and futon fences. After laying on the surface of the revetment, or by laying other cobblestones, quarry stones, pebbles, generated soil, etc. between the cobblestones connected to the net body, However, even in this case, since a wire mesh using a metal wire is used, rusting and corrosion do not change, and a thick metal wire is used as the wire mesh to obtain durability. From the relationship, at the beginning of laying, it was unstable because it did not fit the surface of the revetment, and in the revetment in areas where waves and currents were intense, there was a problem that the sediment at the bottom was sucked out by the flowing water and submerged.

  For these reasons, the present inventors have proposed a method of using a mat made of a thermoplastic synthetic resin instead of a metal wire mesh (Japanese Patent Application No. 2002-129404). The method of using a mat made of thermoplastic synthetic resin has the advantage that the sucking prevention effect is large and the environment is not damaged. However, the mat made of thermoplastic synthetic resin is flexible, and the protective mat for civil engineering is heavy, so when laying the protective mat on one side with a heavy machine and lifting it, However, there is a problem that the laying of the protective mat hangs down, making accurate laying difficult, and when the weight of the protective mat is increased, there are problems such as falling off, which requires safety precautions.

  For this reason, without using a metal wire mesh, it is excellent in durability, is easy to adapt to the surface of the revetment, does not cause subsidence, is easy to hang, and can be laid safely and accurately. Development of a protective mat for civil engineering was requested.

  The present invention is a civil engineering that is easy to construct, has a large anti-suction effect, prevents subsidence, maintains a natural landscape, protects the slope for a long time, is safe to hang, and is easy to lay accurately A protective mat for use and a revetment method using the protective mat are provided.

  The present invention has been made as a result of earnest studies to achieve such an object. Specifically, a plurality of block stones each having a recessed fitting portion into which a connector can be fitted, and a fineness of 1000 to 7000 dt. A mat that is woven with a uniaxially stretched linear body made of thermoplastic synthetic resin, can be inserted into a connector, and has a cylindrical portion into which a rigid rod-like body can be inserted on at least one side of the edge. The present invention provides a civil engineering protection mat characterized in that it is fixed by inserting a connector having a collar at the head and inserting it into the concave fitting portion through a mat-like body.

Further, the present invention provides a woven fabric in which a thick woven portion densely woven and a plurality of void portions communicating between the front and back sides are arranged by a flat yarn made of a thermoplastic synthetic resin in which a mat-like body is uniaxially stretched. The above-mentioned civil engineering protection mat comprising a mat, the above-mentioned civil engineering protective mat comprising a hard synthetic resin, the above-mentioned civil engineering protective mat comprising a rod-like body inserted through the cylindrical portion of the mat-like body, and the connector The above-mentioned protective mat for civil engineering, in which a bonding agent is injected into the block stone and the binder is bonded to the block stone, the hollow portion where the connector has an interruption at the tip and the shaft core is inserted The above-mentioned civil engineering protection mat, in which the shaft core is driven, the hollow portion is expanded in diameter and is fixed to the concave fitting portion, and the mat-like body is sandwiched between the flange portion of the connector and the washer It provides a protection mat for civil engineering as described above, which is combined with a block stone That.

  Further, according to the present invention, the mat-like body is formed by weaving three or more warps and wefts as a set, and a thick portion in which three or more layers of woven yarns overlap each other, and a gap between the front and back sides. The above-mentioned protective mat for civil engineering comprising a woven mat in which gaps communicating with each other are lined up, and the mat-like body from the bottom in the cross section, one or more wefts, two or more warps, two or more wefts, one The block A in which the above warps are sequentially arranged, and one or more warps, two or more wefts, two or more warps, one or more wefts are sequentially arranged from the bottom in the cross section. The thermoplastic composite that constitutes the above-mentioned protective mat for civil engineering, and the striated body, in which the block B has thick portions that are alternately and repeatedly arranged on the front, rear, left, and right sides, and gaps formed at the corners of each block The above-mentioned protective mat for civil engineering, in which the resin is polyolefin, and the mat-like body for heat treatment The above-mentioned protection mat for civil engineering, wherein the warp and the weft are heat-welded, and the above-mentioned mat-like body interweaves with different color stripes to form mark lines. A protective mat for civil engineering is provided.

  Furthermore, the present invention provides a revetment method characterized by laying any one of the above-mentioned protective mats for civil engineering on a revetment target surface with the massive stone side as an upper surface, and as a massive stone material, cobblestones, calculus, pseudo stones Alternatively, the above revetment method using a concrete block is provided.

  Since the present invention comprises such a configuration, there is no risk of rusting, corrosion, no damage to the environment and aesthetics, and the mat-like body is woven with a linear body made of a thermoplastic synthetic resin. A familiar mat with the revetment target ground, which can suppress the occurrence of slipping, has an excellent anti-sucking effect, and is free from subsidence.

  In addition, the suspension by heavy machinery is reliable, it can be laid accurately, and it is possible to work safely.

  As shown in FIG. 1, the civil engineering protection mat 1 according to the present invention is woven with block stones 2 and 2 in which a recessed fitting portion 4 is formed, and a uniaxially stretched linear body made of a thermoplastic synthetic resin. It is obtained by combining the mat-like body 3 and fitting and fixing the connector 8 having a collar portion on the head through the mat-like body 3 to the concave fitting portion 4, and as shown in FIG. Further, the protection mat 1 is laid on the protection target surface 21 with the massive stone 2 side as the upper surface.

  As the massive stone material 2, cobblestone, spar stone, artificial stone, or concrete block can be used, and the size can be arbitrarily selected according to the purpose, but generally 1 to 100 kg, preferably 10 -50 kg. As shown in FIGS. 1 and 2, the massive stone 2 is provided with a concave fitting portion 4 into which a connector 8 can be fitted. The recessed fitting portion 4 has a hole shape or a groove shape with a depth that allows the connector 8 to be fitted and fixed. The number of the recessed fitting portions 4 may be one per block stone, but a plurality of blocks per block stone for safety. It is desirable to provide it. In addition, it is desirable to provide unevenness 4a such as a thread on the inner surface of the recessed fitting portion 4 in order to prevent the connector 8 from coming off.

  The block stone 2 with the recessed fitting portion 4 thus drilled is combined with the mat body 3. Usually, the lump stones 2 are laid out at a predetermined interval and the mat-like body 3 is put on them. The place where the massive stones 2 are laid out is arbitrary, but is generally performed at or near the factory work place, the place to be protected.

  As the mat-like body 3, a uniaxially stretched linear body 12 made of a thermoplastic synthetic resin is used, and the cross-section can be a square, a circle, or other irregular shape, and a flat yarn, monofilament, multifilament, span Can be used as a thread. Of these, flat yarn is preferred. Further, it may be twisted or non-twisted, and may be braided to form a string or a band, or a plurality of pieces may be twisted to form a rope. It may be. In general, a uniaxially stretched synthetic resin film is slit into a predetermined width to form a ribbon, and this is used by focusing in the width direction.

  As the thermoplastic synthetic resin, a thermoplastic synthetic resin having an excellent stretching effect is used, and in general, polyolefin such as high density polyethylene, polypropylene, ethylene / propylene block copolymer, polyester, polyamide, polyaramid, etc. are used. it can. Of these, polyolefins such as high-density polyethylene and polypropylene are preferable.

  Various additives can be added to the thermoplastic synthetic resin forming the filament 12 depending on the purpose. Specifically, antioxidants such as phenols, organic phosphites and phosnite, organic phosphorus and thioethers; hindered amines and other light stabilizers; benzophenone, benzotriazole and benzoate UV absorbers Nonionic, cationic and anionic antistatic agents; bisamide, wax, organometallic salt, etc. dispersant; amide, wax, organometallic salt, ester, etc. lubricant; bromine-containing organic Flame retardants such as phosphoric acid, phosphoric acid, antimony trioxide, magnesium hydroxide and red phosphorus; organic pigments; inorganic pigments; inorganic fillers and organic fillers.

  These additives are blended in any step of producing a material composition that is appropriately combined to form the filament 12. The blending of the additive may be prepared by mixing at a predetermined ratio using a kneading device such as a conventional known twin screw extruder, Banbury mixer, kneader, mixing roll, and melt-kneading the mixture. A so-called master batch having a high concentration may be prepared and used after being diluted.

  There is no restriction | limiting in particular as a shaping | molding method of the linear body 12, An extrusion molding method can be utilized, A thermoplastic synthetic resin film is used using the extrusion molding method using a T die, an inflation molding method, a calendar method, etc. A long flat yarn can be obtained by forming and slitting the obtained film before or after stretching.

  Stretching can be performed by stretching with a hot roll, stretching with a hot plate, stretching with a hot air furnace, or the like. The draw ratio is 3 to 15 times, preferably about 7 to 12 times. The thickness of the flat yarn is a fine yarn having a fineness of 1000 to 7000 dt, preferably about 1500 to 5000 dt, and a tensile strength of 5 to 70 kgf, preferably 8 to 60 kgf.

  As shown in FIG. 5 (A), the linear body 12 may be a single layer body of a thermoplastic resin, and becomes a base layer 13 as shown in FIGS. 5 (B) and 5 (C). A laminate in which the bonding layer 14 is laminated on one side or both sides of a thermoplastic resin can be used. Further, as shown in FIG. 5D, a seascore structure may be adopted, and as shown in FIG. 5E, a side-by-side structure may be adopted.

  The joining layer 14 joins the converging filaments 3 or joins the warp and weft yarns to prevent slippage of the flange 8a of the connector 8 described later, thereby preventing misalignment. A thermoplastic resin having a melting point lower than that of the thermoplastic resin used as the base layer 13 is used. Examples of thermoplastic resins having a low melting point include high pressure method low density polyethylene, linear low density polyethylene, high density polyethylene, ethylene / propylene copolymer, ethylene / vinyl acetate copolymer polyolefin, polyester, polyamide, polyacrylamide, etc. A material having a lower melting point is selected in relation to the thermoplastic resin used as the base layer 13.

  Lamination of the resin layer to be the base layer 13 and the bonding layer 14 can be performed by a method known per se. A film to be the base layer 13 and a film to be the bonding layer 14 are formed in advance, and a dry lamination method or a heat lamination method is used. Known methods such as a means for forming multiple layers, a method of extrusion laminating a thermoplastic synthetic resin for forming a bonding layer 14 on a pre-formed base layer 13 film, or extrusion molding as a laminate by a multilayer coextrusion method However, in terms of ease of molding, cost, and adhesiveness between each layer of the product, a laminate of the base layer 13 and the bonding layer 14 can be obtained in a single layer by the multilayer coextrusion method. The method is desirable. When a seascore structure or a side-by-side structure is used, a multilayer coextrusion method is generally employed.

  Further, as a means for stretching to form the striated body 12, a film that becomes the base layer 13 may be stretched in a uniaxial direction and then laminated with a synthetic resin that becomes the bonding layer 14, and may be slit into a tape shape, or It can also be obtained by slitting a film in which the base layer 13 and the bonding layer 14 are laminated and then stretching in a uniaxial direction.

  As shown in FIG. 1, the filament 12 is knitted to form a mat-like body 3, which is used for the civil engineering protection mat 1 of the present invention. The mat-like body 3 is a woven mat into which a connector 8 to be described later can be inserted to lock the connector 8, and is formed on the head of the connector 8 when a tensile force is applied. It is set as the structure where the collar part 8a does not come out.

  In order to obtain a structure in which the flange 8a of the connector 8 does not come out, the mat-like body 3 is prevented from being misaligned, and is woven using the linear body 12 having the bonding layer 14 as described above. It can be performed by heat-treating the woven mat-like body 3 and fusing between the warp and the weft, but together with the fusing or independently, the misalignment of the mat-like body 3 is caused by the woven structure. Can be prevented.

  For example, as shown in FIG. 6, as the mat-like body 3, thick portions 3 a are arranged in the front, rear, left, and right, and gap portions 3 b that communicate the front and back of the mat-like body 3 between the corner portions of the thick portions 3 a. It can be arranged. In the present invention, the thick portion 3a means a portion where warps and wefts are densely woven so as to form three or more layers, and the gap portion 3b means a gap formed between the warps and the wefts. means.

  Any method may be used to form the mat-like body 3 having the thick portion 3a and the gap portion 3b. However, in order to increase the thickness with the thick portion 3a being bulky, a plurality of filaments are used. It is preferable that each warp is formed by superimposing the bodies 12 and that each weft is a double weave in which a plurality of filaments 12 are overlapped and woven.

  In addition, in order to form a tightly thickened thick portion 3a without a misalignment by firmly combining warp and weft, and to have a structure in which the collar portion 8a formed on the head of the connector 8 does not come out, A woven structure is desirable.

  That is, as shown in FIG. 6, the block A and the block B constituting the thick portion are formed, and the mat-like body 3 is formed by alternately arranging the front, rear, left and right. As shown in FIG. 7 (A), the block A and the block B are composed of three warps and three wefts, and the block A has a weft 5a located at the lowest level in the cross section. The warp yarns 6b and 6c are located, the weft yarns 5b and 5c are arranged on the warp yarns 6b and 6c, and the warp yarn 6a is located on the uppermost stage. Block B is formed at a position adjacent to block A, and in block B, warp 6a is located at the lowest level in the cross section, wefts 5b and 5c are located above, and warp yarns 6b and 6c are located above, and uppermost level. Is woven so that the weft 5a is located.

  The weft 5a straddles two warps 6b and 6c, and is then drawn out to the opposite surface of the mat-like body 3 to form a woven fabric structure. Further, as is clear from FIGS. 7B and 7C, the warp 6a is similarly drawn out on the opposite surface after straddling two wefts 5b and 5c.

  With this configuration, the wefts 5 and the warps 6 are tightened by the wefts 5a and the warps 6a that alternate between the uppermost stage and the lowermost stage, and the wefts 5 and the warps 6 are closely combined. Thus, the block A and the block B which are firmly coupled are formed, and the bulky thick portion 3a is formed, and the gap portion 3b is formed therebetween. 7 and the description thereof are exactly the same when rotated 90 degrees, that is, when the weft 5 and the warp 6 are replaced.

  In FIG. 7, wefts and warps are woven as a set of three, but the number can be further increased. For example, as shown in FIG. It can also be formed by weaving in three pieces.

  7 is formed in a four-stage configuration including weft / warp / weft / warp or warp / weft / warp / weft, it may be a six-stage configuration or an eight-stage configuration.

  The mat-like body 3 has a wall thickness (maximum part) of 2 mm or more, and a tensile strength of 200 kgf / 30 mm or more, preferably 300 kgf / 30 mm or more. Further, the mat-like body 3 can be formed by using flat yarns of different colors with a predetermined interval between the wefts or warps, and by forming the mark lines by weaving the flat yarns of different colors. It can be used as a guide line for adjustment, positioning when laying, and cutting. The mark line can also be written with paint, ink, or the like.

  In the present invention, a cylindrical portion 16 through which the rigid rod-like body 15 can be inserted is formed on at least one side of the mat-like body 3. That is, the cylindrical part 16 into which the rigid rod-like body 15 can be inserted is formed on one side of the end of the mat-like body 3, two opposite sides, two sides orthogonal to each other, or all surrounding sides. As shown in FIG. 9A, the cylindrical portion 16 is formed by folding the edge of the mat-like body 3 and sewing it at a slight interval from the turning point. Can be formed. Depending on the purpose, as shown in FIG. 9 (B), eyelets 17 may be provided directly below the cylindrical portion 16 to form insertion holes for hook collars 20.

  Moreover, the cylindrical part 16 does not necessarily need to be continuous, and as shown in FIG. 9C, the cylindrical part 16 can be formed by attaching the suspension band 18 at a predetermined interval. Furthermore, by forming the notch 19 in the cylindrical portion 16 of the type shown in FIG. 9A, the cylindrical portion 16 can be directly hooked with a hook or the like and suspended.

  The material constituting the rod-like body 15 can be widely adopted as long as it is a rigid material, but in general, natural materials such as wood and bamboo, metals such as iron and aluminum, FRP, that is, fiber reinforced polyester, Reinforced plastics such as fiber reinforced polycarbonate can be used. As the reinforcing fiber of the synthetic resin, glass fiber, carbon fiber, whisker or the like can be used.

  The mat-like body 3 thus obtained is combined with the block stone 2. Normally, the mat-like body 3 is covered on the lump-shaped stone material 2 laid out, and as shown in FIGS. 1 and 2, a connector 8 having a collar 8 a on the head is passed through the mat-like body 3 and the massive stone material 2. The mat-like body 3 and the block stone 2 are combined by fitting into the concave fitting portion 4.

  The connector 8 may be made of a metal such as copper, iron, stainless steel, etc., but is preferably molded from a synthetic resin from the viewpoint of preventing rusting. The synthetic resin forming the connector 8 is polyphenylene. Thermoplastic resins having high rigidity such as ether, polycarbonate, polyester, polyamide, and polyimide, or thermosetting resins such as unsaturated polyester can be used.

  An inorganic filler can be added to the synthetic resin forming the binder 8, and this is a preferred embodiment. As an inorganic filler, it does not ask | require that it is a granular form and a powder form if it is a fibrous thing. Examples of the fibrous filler include glass fiber, carbon fiber, whisker, and the like. Shapes include convergent cut, short fiber, filament, roving, mat, whisker, etc. In the case of convergent cut, those having a length of 0.05 mm to 50 mm and a fiber diameter of 5 to 50 μm are preferable. .

  On the other hand, examples of granular and powder fillers include talc, carbon black, graphite, titanium dioxide, silica, mica, calcium carbonate, calcium sulfate, barium carbonate, magnesium carbonate, magnesium sulfate, barium sulfate, oxysulfate, tin oxide. , Alumina, kaolin, silicon carbide, metal powder, glass powder, glass flakes, glass beads and the like.

  These inorganic fillers improve the affinity with the resin component, improve the dispersibility and mechanical strength of the inorganic filler, and chemically stabilize the surface of the inorganic filler, thereby causing resin discoloration and resin deterioration. Surface treatment to prevent it is desirable, and as surface treatment agents, surfactants, coupling agents, higher fatty acids, higher fatty acid esters, higher fatty acid metal salts, higher alcohols, various waxes, polar olefins, etc. Can be used.

  The connector 8 is provided with irregularities 8c such as screw grooves in a direction substantially perpendicular to the axial direction so that irregularities are generated in the length direction at the leg 8b portion to be fitted to prevent the connector 8 from coming out. It is preferable to keep it.

  The flange portion 8a of the connector 8 is locked so that the head of the connector 8 does not come out of the mat-like body 3, and may have a structure enlarged in the radial direction, and its cross-sectional shape is not limited. However, it is usually formed in a disk shape. The flange portion 8a may be formed integrally with the leg portion 8b of the connector 8, and a disc-like body having a through hole formed in the center portion is fitted to the leg portion 8b formed with a bulge in the head portion. You may do it.

  Further, as shown in FIG. 2 (D), a washer 15 can be attached to the connector 8 on the side of the massive stone 2 of the mat-like body 3 to stabilize the connection with the mat-like body 3. This is the preferred method. The washer 15 is preferably formed of the same type and the same material as the connector 8.

  As shown in FIG. 2 (A), the connector 8 is joined by fitting the leg 8b of the connector 8 to the concave fitting portion 4 of the block stone 2 and bonding with an adhesive 7 such as cement mortar or epoxy resin. can do. Moreover, as shown in FIG. 2 (B), by using a connector 8 having a hollow portion 8d into which the tip 9 is broken and the shaft core 9 is inserted, the connector 8 is driven into the recessed fitting portion 4. The shaft core 9 can also be coupled by being pushed into the hollow portion 8d to increase the diameter of the hollow portion 8d.

  Further, as shown in FIG. 2 (C), the cylindrical stator 10 is inserted into the recessed fitting portion 4, and the legs 10b of the connector 8 are coupled to the inserted stator 10 for coupling. Can do. By fitting the leg portion 8 b of the connector 8 to the stator 10, the stator 10 is expanded in diameter and coupled to the recessed fitting portion 4.

  In the civil engineering protection mat 1, a rod-like body 15 is inserted into a cylindrical portion 16 and is suspended and laid on a protective surface. The civil engineering protection mat 1 thus obtained can be lifted by sandwiching the cylindrical portion 16 in which the rod-like body 15 is inserted and formed by using a hook crane or the like. The rod-like body 15 can be hung by being inserted into the mat-like body 3 immediately below or the eyelet 17 formed immediately below. In the types shown in FIGS. 9C and 9D, the hook 20 can be hooked on the rod-shaped body 15 and lifted.

  In this way, the mat-like body 3 in which the massive stone material 2 is bonded to a predetermined density is placed between the massive stone materials 2a that are turned upside down and laid at the revetment target position with the massive stone material 2 side as the upper part and joined to the mat-like body 3 as necessary. As shown in FIGS. 3 and 4, the revetment target position is protected without damaging the natural landscape by laying lump stone material 2b such as other cobblestones, chopping stones, pebbles, etc. be able to.

  Further, as shown in FIG. 3 (B), it is also possible to vegetate the plant 11 by placing gravel 2c, construction generated soil, or the like between the block stones 2a coupled to the mat-like body 3.

  After laying the civil engineering protection mat 1, the rod-shaped body 15 may be pulled out or left as it is. When the rod-like body 15 is left, it can be used for connection of the civil engineering protection mat 1 as shown in FIG.

  In addition, the protection mat 1 for civil engineering can be stabilized by placing a pile body at a predetermined interval on the mat-like body 3 of the protection mat 1 for civil engineering, and the mat shape of the protection mat 1 for civil engineering is also possible. It is also possible to connect and stabilize the mat-like body 3 by laying the body 3 so as to overlap and placing a pile body in the overlapping portion.

Longitudinal cross section showing how to join massive stones (A), (B), (C), (D) is a longitudinal cross-sectional view showing a method for joining massive stones Longitudinal section showing an example of laying a protection mat for civil engineering The perspective view which shows the state of this invention revetment construction Longitudinal sectional view showing examples of striatum Plan view showing an example of a mat-like body Longitudinal sectional view showing an example of woven structure of mat-like body Longitudinal sectional view showing another example of woven structure of mat-like body The perspective view which shows the example of the cylindrical part of a mat-like body Longitudinal sectional view showing an example of mat-like body connection

Explanation of symbols

1: Protection mat for civil engineering 2: Massive stone material 3: Mat-like body 3a: Thick part 3b: Cavity part 4: Recessed part 5: Weft 6: Warp thread 7: Bonding agent 8: Connector 8a: Saddle part 8b: Leg Part 8d: Hollow part 9: Shaft core 10: Stator 11: Plant 12: Striated body 13: Base layer 14: Joining layer 15: Rod-like body 16: Tubular part 17: Eyelet 18: Suspension band 19: Notch 20: Spear

Claims (15)

  It is woven with a plurality of massive stones with recessed fittings into which the connector can be fitted, and a linear body made of thermoplastic synthetic resin that is uniaxially stretched with a fineness of 1000 to 7000 dt. The mating body having a cylindrical portion in which a rigid rod-like body can be inserted on at least one side of the edge portion is combined, and a connector having a collar portion on the head is passed through the mat-like body to the concave fitting portion. A protection mat for civil engineering, which is fixed by insertion.   The mat-like body is composed of a woven mat in which a thick portion woven densely by a flat yarn made of a uniaxially stretched thermoplastic synthetic resin and a plurality of voids communicating between the front and back are arranged in rows. Item 1. A civil engineering protection mat according to Item 1.   The civil engineering protection mat according to claim 1 or 2, wherein the connector is made of a hard synthetic resin.   The civil engineering protection mat according to any one of claims 1 to 3, wherein a rod-like body is inserted through the cylindrical portion of the mat-like body.   The civil engineering protection mat according to any one of claims 1 to 4, wherein the connector is inserted into the recessed fitting portion and a bonding agent is injected to bond the connector to the block stone.   The connector has an interrupt at the tip, has a hollow portion into which the shaft core is inserted, and the shaft core is driven, and the hollow portion is expanded in diameter and fixed to the recessed fitting portion. The protection mat for civil engineering in any one of 1-4.   The civil engineering protection mat according to any one of claims 1 to 6, wherein irregularities are formed on a peripheral surface of the connector.   The protective mat for civil engineering according to any one of claims 1 to 7, wherein the mat-like body is combined with the block stone in a state of being sandwiched between the collar of the connector and a washer.   The mat-like body weaves three or more warps and wefts as a set, and a thick portion where three or more layers of woven yarn overlap each other, and a gap portion that connects between the front and back is arranged between the thick portions The protective mat for civil engineering according to any one of claims 1 to 8, comprising a woven mat formed.   The mat-like body has a block A in which one or more wefts, two or more warps, two or more wefts, one or more warps are sequentially arranged from the bottom in the cross section, and one from the bottom in the cross section. The above-mentioned warp, two or more wefts, two or more warps, a block B configured by sequentially disposing one or more wefts, and a thick portion in which the front and rear, left and right are alternately disposed; The civil engineering protection mat according to any one of claims 1 to 9, further comprising a gap formed in each block corner.   The protective mat for civil engineering according to any one of claims 1 to 10, wherein the thermoplastic synthetic resin constituting the filament is a polyolefin.   The civil mat protection mat according to any one of claims 1 to 11, wherein the mat body is heat-welded between the warp and the weft by heat treatment.   The civil engineering protection mat according to any one of claims 1 to 12, wherein a mark line is formed by weaving striated bodies of different colors into the mat-like body at predetermined intervals.   A revetment method comprising laying the protection mat for civil engineering according to any one of claims 1 to 13 on a revetment target surface with the massive stone side as an upper surface. The revetment method according to claim 14, wherein cobble stones, rubble stones, artificial stones, or concrete blocks are used as the block stone material.

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