JP2004339902A - Synthetic resin-made pile body for civil engineering - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive, non-bulky, lightweight, easily conveyable, rustless, high strength and highly safe pile body for civil engineering. <P>SOLUTION: The synthetic resin-made pile body for civil engineering comprises: a rod-like body 1A continuously providing a locking projection 3 projected sideward upward of the rod-like body 1A, and forming a conical arrowhead part 4 widening a cross section toward an upper part downward; and a plate-like flange body 1B forming an insertion hole 5 inserting the rod-like body 1A in a center part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a synthetic resin civil engineering pile which has high rigidity and is suitable as a retaining pile for a civil engineering sheet such as a woven cloth or a net.
[0002]
[Prior art]
When reclaiming soft ground and embankment, if embankment is performed directly on soft ground, soft mud flows in the peripheral direction due to the load of the embankment and is expelled, causing a side force flow phenomenon where the embankment sinks, There is a problem that requires embankment more than the calculated value.
[0003]
For this reason, conventionally, in reclaiming and embankment of soft ground, it has been practiced to lay a synthetic resin woven cloth on the soft ground and put the soil thereon. In this case, if the embankment is performed only in the state where the woven fabric is merely laid, there is a problem that the settlement is locally caused and the surrounding woven fabric is drawn, so that the settlement of the embankment cannot be prevented. The woven fabric is used in such a manner that the whole is connected so that a pulling phenomenon does not occur.
[0004]
As a method of connecting the woven fabrics, there are sewing and adhesion, but to sew a large-area woven fabric, it takes time and effort to increase the efficiency and increase the cost. Also, the method of bonding using an adhesive has a problem that the bonding strength is not constant depending on the environment such as weather. For example, when trying to bond at a laying site, if the site is wet with rain etc., it is difficult to work so that the woven fabric is not stained, and if the woven fabric becomes dirty, poor adhesion occurs and the purpose is There is a problem that the adhesive strength cannot be obtained.
[0005]
For this reason, it has been practiced to lay a woven fabric so as to overlap the edges, drive a pile into the overlapped portion, connect the woven fabric, and prevent the pulling phenomenon.
[0006]
In addition, civil engineering piles are used for various other purposes. For example, on a cut surface in laying a road, a railroad, etc., a net-like body is covered to prevent falling of earth and sand and stone blocks to ensure safety. In order to prevent landslides on the slopes, piles are used alternately in a net-like body called a geogrid and earth and sand. In this case, piles are also used for laying the net.
[0007]
Conventionally, L-shaped, U-shaped, and inverted-J-shaped metal rods have been used as piles for such purposes, but in the case of civil engineering sheets laid on soft ground, the pulling force is from any direction. It is difficult to predict whether it will be applied, and depending on the direction of the pulling force, the civil engineering sheet may easily fall out of the pile body. In addition, even in the civil engineering sheet laid on the slope or the like, the pile body may rotate due to vibration or the like, and the civil engineering sheet may slip out, or the pile body may fall out due to a decrease in the escape resistance of the piled pile body. Furthermore, when the pile body is manufactured from steel or the like, there is a problem of rusting and corrosion, and the surroundings of construction materials and the like may be discolored to impair the aesthetic appearance and a problem of maintaining strength.
[0008]
For this reason, it is conceivable to form the pile body with a synthetic resin and provide a flange having a sufficient size on the upper part of the pile body, or to project protrusions for preventing escape from both wings. When the body is provided, it is inconvenient to transport because it is bulky, and when a large protrusion for preventing the protrusion is extended on both wings, there is a possibility that the hammer or the like hits the protrusion for preventing the protrusion at the time of setting the pile and may be broken. .
[0009]
For this reason, there is a demand for the development of an inexpensive, low-bulk, lightweight, easy-to-transport, high-strength, and high-safety civil engineering pile without such problems.
[0010]
[Patent Document 1] JP-A-2003-41580 [Patent Document 2] JP-A-10-191934
[Problems to be solved by the invention]
The present invention provides an inexpensive, non-bulky, lightweight, easy-to-transport, rust-free, high-strength, and high-safety civil engineering pile.
[0012]
[Means for Solving the Problems]
The present invention has been made as a result of intensive studies in order to achieve such an object. Specifically, locking projections that protrude laterally upward are continuously provided, and the cross-section widens downward and upward. A synthetic resin civil engineering pile, comprising: a rod-shaped body having a conical arrowhead-shaped portion formed therein; and a plate-shaped flange-shaped body having an insertion hole formed in a central portion thereof through which the rod-shaped body can be inserted. It provides the body.
[0013]
Further, the present invention provides a plate-like body in which a locking projection is continuously provided along a length direction of the rod-like body, a lower edge of the plate-like body is an inclined surface that rises toward a tip, and an upper edge is an upper end of the rod-like body. Or the above-mentioned synthetic resin civil construction pile connected to a slightly lower portion thereof, and the above-mentioned synthetic resin formed of a horizontal board-like body having a locking projection and connected to the upper end of the rod-like body or slightly below the lower end thereof. The above-mentioned synthetic resin civil engineering civil engineering pile, wherein the insertion hole of the flange-like body is formed in a size and shape in which a lower part of a locking projection connected to the rod-like body is fitted and engaged. An object of the present invention is to provide a pile body and the above-mentioned synthetic resin civil construction pile body, in which a plurality of grooves extending in the length direction over the main body and the barbed portion of the rod-shaped body are formed on a peripheral surface.
[0014]
Further, the present invention provides the above-mentioned synthetic resin civil engineering pile body, wherein the flange-shaped body is made of a synthetic resin having elasticity to bending stress, the flange-shaped body is a high-density polyethylene, an ethylene / α-olefin copolymer, Or, the above-mentioned synthetic resin civil engineering pile made of polypropylene, the above-mentioned synthetic resin civil engineering pile made of a rod-shaped body integrally formed of a synthetic resin containing an inorganic filler, and an inorganic filler glass fiber, The above-mentioned synthetic resin civil construction pile body which is carbon fiber or whisker, the above-mentioned synthetic resin civil construction pile body in which a steel rod is internally provided in a rod-like body, and a metal made at the tip of the barbed part. An object of the present invention is to provide the above-mentioned synthetic resin civil engineering pile body fitted with an umbrella-like body.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIG. 1, a synthetic resin civil engineering pile 1 of the present invention has a bar-shaped body 1A integrally formed with a locking projection 3 at an upper part, an arrowhead-shaped part 4 at a lower part, and the rod-shaped body at a central part. And a plate-like flange 1B having an insertion hole 5 through which the body 2 of the body 1A can be inserted.
[0016]
As the synthetic resin forming the rod-shaped body 1A of the present invention, a resin having high rigidity is preferable, and a heat-resistant resin such as polyphenylene ether, polycarbonate, polyester, polyamide, polyimide, high-density polyethylene, ethylene-propylene copolymer, polypropylene, and ABS resin is used. A thermoplastic resin or a thermosetting resin such as an unsaturated polyester can be used.
[0017]
It is desirable to add an inorganic or organic filler to the synthetic resin forming the rod-shaped body 1A. The rigidity can be improved by adding a filler. It does not matter whether the inorganic filler is fibrous, granular or powdery.
[0018]
Examples of the fibrous filler include glass fiber, carbon fiber, and whisker. As the fibrous filler, the shape may be a cut cut shape, a short fiber, a filament shape, a roving shape, a mat shape, a whisker, or the like. Those having a diameter of 5 to 50 μm are preferred.
[0019]
On the other hand, as the granular or powdery filler, for example, 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 flake, glass beads and the like.
[0020]
Among the various fillers described above, a vitreous filler such as glass powder, glass filament, and glass fiber is particularly preferable. In particular, a composite resin in which glass fiber is blended with a rigid resin such as polycarbonate in an amount of 5 to 50% by weight, preferably 10 to 45% by weight, and more preferably 20 to 40% by weight is desirable.
[0021]
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 to change the color of the resin. It is desirable that the surface treatment is carried out to prevent resin deterioration. As the surface treatment agent, surfactants, coupling agents, higher fatty acids, higher fatty acid esters, and higher fatty acid metal salts, higher alcohols, various waxes, Polar olefins and the like can be used.
[0022]
The coupling agent used for the surface treatment is used for improving the adhesiveness between the filler and the resin, and includes a so-called silane coupling agent, a titanium coupling agent, and the like. Any one can be selected and used. Above all, γ-aminopropyltrimethoxysilane, N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane Aminosilane, epoxysilane, and isopropyl tri (N-amidoethyl, aminoethyl) titanate are preferred.
[0023]
The cross-sectional shape of the main body 2 in the rod-shaped body 1A is basically a circle, but may be any shape such as a quadrangle, a hexagon, and an oval. Further, the main body 2 can be solid as shown in FIG. 3 (A), and can be hollow as shown in FIG. 3 (B). When the main body 2 is hollow, by opening the upper and lower parts of the main body 2, surplus water in the ground can be drained, and the ground can be stabilized. Further, as shown in FIG. 3C, a metal rod-shaped body 2a may be provided. As the metallic rod-shaped body 2a provided in the main body 2, steel, copper, brass, bronze, aluminum, and the like can be widely used, but steel is generally used.
[0024]
Further, it is desirable to form a groove 13 extending in the length direction on the peripheral surface of the main body 2. By forming the groove 13, the material can be saved, the escape resistance can be improved by increasing the surface area of the main body 2, and the drop resistance due to the rotation of the rod-shaped body 1 </ b> A after the casting can be prevented. The effect of preventing the resistance from lowering is great, and it is possible to prevent the pile body 1 from slipping out. The cross-sectional shape of the groove 13 is arbitrary and may be a U-shape, a U-shape, or a V-shape. In general, about 1 to 6 bars are formed over the barbed portion 4.
[0025]
On the upper part of the main body 2, a locking projection 3 is continuously provided so as to protrude to the side. As shown in FIG. 1, the locking projection 3 can be formed in a wing shape, and plate-like bodies 6 a and 6 b can be formed on both upper ends of the main body 2 so as to protrude along the length direction of the main body 2. It is desirable that the plate-like bodies 6a, 6b have lower edges 7a, 7b as inclined surfaces rising toward the front end. By making the lower edge an inclined surface, even when the civil engineering pile 1 is inclined and driven, the engagement with the flange-shaped body 1B is stabilized, and the civil engineering sheet and the like can be properly locked. Can be.
[0026]
Also, the upper edges 8a, 8b of the plate-like bodies 6a, 6b are connected so as to be connected to the upper end 9 of the main body 2 or slightly below the upper end 9. Preferably, the upper end 9 of the main body 2 is formed so as to be higher than the uppermost portions of the upper edges 8a, 8b of the plate-like bodies 6a, 6b. By setting the upper end 9 of the main body 2 to be equal to or higher than the upper edges 8a, 8b of the plate-like bodies 6a, 6b, the plate-like body 1 is cast when the civil engineering pile 1 is driven using a hammer, a hook or the like. It is possible to avoid breaking by hitting 6a and 6b.
[0027]
The thickness of the plate-like bodies 6a and 6b is not particularly limited and can be arbitrarily formed, but is generally thinner than the thickness of the main body 2. Further, ribs 10a and 10b are attached to the lower edges 7a and 7b of the plate-shaped members 6a and 6b to increase mechanical strength and stabilize engagement with the flange-shaped member 1B. It is desirable to form so as to protrude from both sides.
[0028]
Further, as shown in FIG. 2, the locking projection 3 can be a disk-shaped body 6c extending in the horizontal direction. The disc-shaped body 6c is desirably a disc-shaped body having a flat upper surface 11a and an inclined surface formed so that the lower surface 11b gradually decreases in thickness in the radial direction. In addition, as shown in FIG. 8, a step can be provided on the lower inclined surface 11b. The inclination of the lower surface 11b or the lower edges 7a, 7b of FIG. 1 is set to be about 10 to 30 degrees, preferably about 15 to 20 degrees with respect to a line orthogonal to the axis of the rod-shaped portion 2.
[0029]
The locking projections 3 can be prevented from falling out of any direction by receiving a pulling force by making the locking projections 3 into a plate shape. Since the pile body 1 for fixing the laid object can be made inconspicuous when it is installed, it does not impair the landscape, and by setting the lower surface 11b as an inclined surface, when the casting portion is locally inclined. This also enables the pile body 1 for fixing the laid object to be driven vertically. Further, as shown in FIG. 4, it is desirable to form a protruding portion 9a at the center of the upper surface for hitting with a hammer at the time of driving.
[0030]
In addition, from the viewpoint of convenience of transportation and handling and prevention of the escape of the civil engineering sheet, the overhang amount of the disc-shaped body 6c, that is, the radial length from the peripheral surface of the main body 2 to the outer periphery of the disc-shaped body 6c is generally The diameter is 0.5 to 3.0 times, preferably 0.5 to 2.0 times, more preferably 1.0 to 1.5 times the diameter of the main body 2.
[0031]
The shape of the upper surface of the disk-shaped body 6c is basically circular, but it may be deformed into an elliptical shape, a rectangular shape, or the like according to the purpose, or a knurled shape with notches provided at intervals in the circumferential direction.
[0032]
At the lower end of the main body 2 of the rod-shaped body 1A, an arrowhead-shaped portion 4 is continuously provided. The barbed portion 4 is formed in a conical shape whose cross section widens toward the upper part. The conical shape may be a conical shape or a pyramid shape. In the present invention, a part in which a groove is formed in a conical body or the like, or a part in which a projection is formed is included in a cone as a deformed cone.
[0033]
Generally, as shown in FIG. 6, the upper part of the barbed portion 4 is protruded from the peripheral surface of the main body 2 so as to prevent the pile body 1 after casting from coming out, and a hook portion 4 a is formed. If necessary, a metal umbrella-shaped body 12 can be fitted and attached to the tip of the barbed-shaped portion 4.
[0034]
The length and thickness of the synthetic resin civil engineering pile 1 of the present invention can be arbitrarily selected depending on the purpose, but generally, the pile diameter is about 5 to 80 mm, and the pile length is about 250 to 2500 mm. You.
[0035]
Further, a detent portion 14 can be formed on the main body 2 of the rod-shaped body 1A of the present invention, as shown in FIG. The anti-rotation part 14 functions to prevent a drop in the strength of the driving due to the pulling force after the driving or the looseness caused by the vibration and to improve the resistance to the pull-out force. It is formed in the lower part of the middle of the main body 2 so as to protrude from the peripheral surface of the main body 2. The diameter of the detent portion 14 is 1.5 to 3.5 times, preferably 2.0 to 2.5 times the diameter of the main body 2, and is lower than half the length of the rod 2. Preferably it is formed below one third. The rotation preventing portion 14 has a size and a shape that can be inserted into the insertion hole 5 of the flange 1B.
[0036]
Further, the upper surface of the rotation preventing portion 14 is made horizontal so that a hooking action is exerted on the soil, and the lower portion is formed so as to be reduced in diameter downward so as to facilitate casting. The inclination of the lower part is about 20 to 40 degrees, preferably about 25 to 35 degrees with respect to the axis of the main body 2.
[0037]
Further, a groove 15 extending in the vertical direction is formed on the peripheral surface of the rotation preventing portion 14, as shown in FIG. By forming the groove 15, it is possible to save material, to improve the resistance to withdrawal by increasing the surface area of the main body 2, and to increase the action of preventing the drop of the driving strength due to the rotation of the pile 1 after driving. it can.
[0038]
The cross-sectional shape of the groove 15 is arbitrary and may be a U-shape, a U-shape, or a V-shape, and generally 1 to 8, preferably about 2 to 6 are formed.
[0039]
The synthetic resin civil engineering pile 1 of the present invention is used in combination with a rod-shaped body 1A and a plate-shaped flange-shaped body 1B having a central portion formed with an insertion hole 5 through which the rod-shaped body 1A can be inserted. .
[0040]
As the synthetic resin constituting the flange 1B, a material that is not damaged even when a hammer or the like accidentally hits the flange 1B at the time of placing the civil engineering pile 1 is desirable, and has appropriate rigidity. A synthetic resin having elasticity and elasticity against bending stress and excellent in impact resistance is desirable, and generally has a tensile fracture strength (MPa) of 10 or more, preferably 20 or more, and a flexural modulus (MPa) of A synthetic resin having a bending strength (MPa) of at least 500, preferably at least 600, and preferably at least 10 is used.
[0041]
Specifically, high-density polyethylene, medium-density polyethylene, polypropylene, olefinic polymers such as ethylene-propylene copolymers, polyesters such as polyethylene terephthalate and polybutylene terephthalate, modified polyesters, polyamides of nylon 6, nylon 66, and polyamides Thermoplastic resins such as acrylonitrile, polyphenylene ether, polycarbonate, polyester, polyamide, polyimide and ABS resin, or thermosetting resins such as unsaturated polyester can be used. Among them, olefin polymers such as high-density polyethylene, ethylene-propylene copolymer, and polypropylene are desirable because they have both impact resistance and elastic processability in addition to rigidity.
[0042]
The upper surface shape of the flange-shaped body 1B is basically circular, but may be deformed into an oval shape, a square shape, or the like according to the purpose, or may be formed in a knurled shape by providing cutouts at intervals in the circumferential direction. Further, an insertion hole 5 through which the main body 2 of the rod-shaped body 1A can be inserted is formed at the center of the flange-shaped body 1B. The insertion hole 5 has a shape and a size into which the main body 2, the barbed portion 4, and the rotation preventing portion 14 can be inserted, and preferably, as shown in FIGS. 7 and 8, a part of the lower portion of the locking projection 3. It is desirable to have a structure that fits and joins.
[0043]
The color of the synthetic resin civil engineering pile 1 of the present invention is not limited and can be arbitrarily selected according to the purpose. However, it is environmentally friendly, and a dark color is preferable from the viewpoint of preventing deterioration of the synthetic resin. , Black, brown and dark green.
[0044]
When laying a civil engineering sheet using the synthetic resin civil engineering pile 1 thus obtained, for example, when laying a civil engineering sheet 18 for reclaiming soft ground, as shown in FIG. The civil engineering sheet 18 is laid so that the edge thereof has an overlapping portion, the flange 1B is disposed at a predetermined position of the overlapping portion 18a, and the main body 2 is inserted into the insertion hole 5 of the flange 1B, and The civil engineering sheets 18 can be connected by simultaneously driving the pile 1 using a hammer, a hook, a pile driver, or the like, and the civil engineering sheets 18 can be fixed at the same time. Of course, if necessary, the civil engineering pile 1 can also be cast and fixed at the center of the civil engineering sheet 18.
[0045]
Further, as shown in FIG. 10, the laying of the civil engineering sheet 18 is performed for the purpose of a protection sheet for protecting a slope 20 such as embankment of a river or the like, a cut, an embankment, a natural slope, or a weed prevention sheet. Can be laid. In addition, when placing on a slope such as cut or embankment, it is desirable to place in a direction orthogonal to the maximum danger sliding surface.
[0046]
Furthermore, a method of reinforcing a soft ground, a slope, or a slope by driving many piles on a soft ground, a soft slope, a slope, or the like is known. Also suitable as a pile for construction methods. It is also possible to prevent a landslide by driving a large number of piles 1 alone on the slope of a bank, a natural slope, or the like.
[0047]
【The invention's effect】
Since the present invention has such a configuration, it is inexpensive, does not rust, has high strength, and since the rod-shaped body 1A and the flange-shaped body 1B are formed separately and used in combination, they are transported without bulk during transportation. In addition, even if the hammer or the like is accidentally hit at the time of casting, the stress is dispersed, so that damage is less likely to occur, and a highly safe pile for civil engineering can be obtained.
[Brief description of the drawings]
1 is a perspective view showing a synthetic resin civil engineering pile of the present invention; FIG. 2 is a perspective view showing another example of the synthetic resin civil engineering pile of the present invention; FIG. 3 is a cross-sectional view showing an example of a rod-shaped body; FIG. 4 is a cross-sectional view showing an example of a locking projection. FIG. 5 is a cross-sectional view showing a detent part. FIG. 6 is a perspective view showing an arrowhead-like part. FIG. 8 is a cross-sectional view showing another example of a state in which a rod-shaped body and a flange-shaped body are combined. FIG. 9 is a longitudinal section showing an example in which the synthetic resin civil engineering pile of the present invention is used for soft ground reclamation. FIG. 10 is a perspective view showing an example in which the synthetic resin civil engineering pile of the present invention is used for slope protection.
1: Pile 1A for civil engineering civil engineering: Rod 1B: Flange 2: Body 3: Locking projection 4: Barbed part 4a: Hook 5: Insertion hole 6: Plate 7: Lower edge 8 : Upper edge 9: Upper end 12: Umbrella 18: Civil engineering sheet 19: Soft ground 20: Slope

Claims (11)

A rod-shaped body having a conical barbed-shaped portion with a cross-section widening toward the top and a central part can be inserted into the rod-shaped body, with a locking projection protruding laterally connected to the upper part. A synthetic resin civil engineering pile body comprising a plate-like flange-shaped body having a large insertion hole formed therein. The locking projection is formed of a plate-like body connected continuously along the length of the rod-like body, the lower edge is an inclined surface rising toward the tip, and the upper edge is at the upper end of the rod-like body or slightly below it. The synthetic resin civil engineering pile according to claim 1, which is connected. 2. The synthetic resin civil engineering pile according to claim 1, wherein the locking projection is formed of a horizontal plate-like body, and is continuously provided at an upper end of the rod-like body or slightly below the rod-like body. The synthetic hole according to any one of claims 1 to 3, wherein the insertion hole of the flange-shaped body is formed in a size and a shape in which a part below a locking projection connected to the rod-shaped body is fitted and engaged. Resin civil engineering pile. The synthetic resin civil engineering pile according to any one of claims 1 to 4, wherein a plurality of grooves extending in the length direction over the main body and the barbed portion of the rod-shaped body are formed on the peripheral surface. The synthetic resin civil engineering pile according to any one of claims 1 to 5, wherein the collar member is made of a synthetic resin having elasticity against bending stress. The synthetic resin civil engineering pile according to any one of claims 1 to 6, wherein the collar body is made of high-density polyethylene, ethylene / α-olefin copolymer, or polypropylene. The synthetic resin civil engineering pile according to any one of claims 1 to 7, wherein the rod-shaped body is integrally formed of a synthetic resin containing an inorganic filler. The synthetic resin civil engineering pile according to claim 8, wherein the inorganic filler is glass fiber, carbon fiber, or whisker. The synthetic resin civil engineering pile according to any one of claims 1 to 9, wherein a steel rod is provided inside the rod. The synthetic resin civil engineering pile according to any one of claims 1 to 10, wherein a metal umbrella-like body is fitted to a tip of the barbed part.

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