JP2003313865A - Synthetic resin pile body for civil engineering - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a civil engineering pile body low in cost, volume, and weight, easily transportable, providing no rust, and high in strength and safety. <P>SOLUTION: In this synthetic resin pipe body for civil engineering, plate-like bodies 5a and 5b having lower edges 6a and 6b formed in inclined faces raising toward tips and upper edges 7a and 7b connected to the upper end 8 or a part slightly lower than the upper end 8 of a bar-like part 2 are arranged continuously with the upper part of the bar-like part 2 on both sides of the bar-like part 2 along the longitudinal direction of the bar-like part 2 to form wing-like parts 3a and 3b. A conical body having a width in cross section increasing toward an upper part is arranged continuously with a lower part to form an arrow-like part 4. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin civil engineering pile which has high rigidity and is suitable as a retaining pile for civil engineering sheets such as woven fabrics and nets.

[0002]

2. Description of the Related Art When filling soft ground and embankment,
When embankment is performed directly on soft ground, the soft mud flows in the peripheral direction due to the load of the embankment and is expelled, causing a side force flow phenomenon in which the embankment sinks. There is.

For this reason, conventionally, in the filling and embankment of soft ground, a synthetic resin woven cloth is laid on the soft ground and the soil is placed on it. in this case,
When embankment is performed only with the woven fabric laid, local subsidence occurs and the surrounding woven fabric is attracted,
There is a problem that the settlement of the embankment cannot be prevented, and the woven fabric is generally used by connecting the entire fabric so that the pulling phenomenon does not occur.

As a method for connecting the woven fabrics for this purpose, there are stitching, bonding and the like, but it takes time and labor to sew a large area woven fabric, and the cost is high. Further, 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 attempting to bond at a laying site, if the site is wet due to rain or the like, it is difficult to work so that the woven cloth does not get dirty, and the woven cloth becomes dirty, resulting in poor adhesion and the purpose. There is a problem that the adhesive strength cannot be obtained.

For this reason, a woven fabric is laid in such a manner that the edges are overlapped with each other, and piles are struck at the overlapped portions to connect the woven fabrics, and the pulling phenomenon is prevented. .

[0006] Civil engineering piles are also used for various other purposes. For example, on a cut surface in laying roads, railways, etc., mesh piles are used to prevent falling of earth and sand and stone blocks and to ensure safety. It is practiced to cover the body, a pile is used for its attachment, and when embankment, in order to prevent landslides on the slope, a mesh-like body called geogrid and earth and sand are used. The method of stacking them in piles alternately is adopted, and piles are also used for laying the net-like body at that time.

Conventionally, as a pile body for this purpose,
L-shaped, U-shaped, and inverted J-shaped metal rods are used, but in the case of civil engineering sheets laid on soft ground, it is difficult to predict from which direction the pulling force will be applied, and the pulling direction Depending on the situation, the civil engineering sheet may easily come out. In addition, even for civil engineering sheets laid on slopes, etc., the pile body may rotate due to vibration and the civil engineering sheet may slip out,
There is a risk that the resistance of the piles that have been driven out will decrease and the piles will fall out.

In order to prevent the civil engineering sheet from slipping out, it is conceivable to provide a collar body having a sufficient size on the upper part of the pile body or to project the slip-out preventing projections on both wings. When it is provided, it is inconvenient to carry because it is bulky to store, and it takes time to process the protrusion prevention protrusions on both wings.
Further, when the pile body is manufactured from steel or the like, there is a problem of rusting or corrosion, which may discolor the surroundings of construction materials or the like to impair aesthetics and cause a problem of strength retention.

Therefore, there is a demand for the development of a pile body for civil engineering which is inexpensive, not bulky, lightweight and easy to carry, and has high strength and safety.

[0010]

DISCLOSURE OF THE INVENTION The present invention is inexpensive, bulky, lightweight and easy to carry, and is free from rust.
It is intended to provide a pile body for civil engineering which has high strength and high safety.

[0011]

SUMMARY OF THE INVENTION The present invention has been made as a result of intensive studies for achieving the above-mentioned object. Specifically, the inclination of the lower edge rising toward the tip above the rod portion. A plate-shaped body whose upper edge is connected to the upper end of the rod-shaped portion or slightly below the rod-shaped portion is continuously provided on both sides of the rod-shaped portion along the length direction of the rod-shaped portion to form a wing-shaped portion, and below. It is intended to provide a synthetic resin civil engineering pile, which is characterized in that a pyramidal body having a cross-section that widens toward the upper part is continuously formed to form a barbed portion.

According to the present invention, the synthetic resin civil engineering pile body, the rod-shaped portion, and the wing-shaped portion, each having a plurality of grooves extending in the longitudinal direction over the rod-shaped portion and the barbed portion, are formed on the peripheral surface. , And the above-mentioned synthetic resin pile for civil engineering, wherein the barbed portion is integrally formed of synthetic resin containing an inorganic filler,
Inorganic filler is glass fiber, carbon fibers or whiskers synthetic resin civil engineering pile body, steel rod-shaped portion of the synthetic resin civil engineering pile for interior, and,
It is intended to provide the above-mentioned synthetic resin civil engineering pile body in which a metal umbrella-shaped body is fitted to the tip end portion of the arrowhead-shaped portion.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Synthetic resin pile 1 for civil engineering of the present invention
As shown in FIG. 1, the rod-shaped portion 2, the wing-shaped portions 3a and 3b above the rod-shaped portion 2, and the barbed portion 4 are integrally formed below.

As a synthetic resin for forming the synthetic resin civil engineering pile 1 of the present invention, a resin having high rigidity is preferable, and polyphenylene ether, polycarbonate, polyester, polyamide, polyimide, high density polyethylene, polypropylene, ABS resin or the like is used. A thermoplastic resin or a thermosetting resin such as unsaturated polyester can be used.

It is desirable to add an inorganic or organic filler to the synthetic resin forming the synthetic resin civil engineering pile 1. Stiffness can be improved by adding fillers. The inorganic filler may be fibrous, granular or powdery.

Examples of the fibrous filler include glass fiber, carbon fiber, whiskers and the like. The shape includes a bundle cut shape, a short fiber, a filament shape, a roving shape, a mat shape, a whisker and the like. In the case of the bundle cut shape, the length is 0.05 mm to 50 mm and the fiber diameter is 5 to 50.
It is preferably μm.

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

Of the above-mentioned various fillers, glass fillers such as glass powder, glass filaments and glass fibers are particularly preferable.

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 discolor the resin. It is desirable that the surface treatment is carried out to prevent resin deterioration and resin, and as the surface treatment agent, a surfactant, a coupling agent, a higher fatty acid, a higher fatty acid ester, and a higher fatty acid metal salt, a higher alcohol, various waxes, A polar olefin or the like can be used.

The coupling agent used for the surface treatment is
It is used to improve the adhesiveness between the filler and the resin, and so-called silane coupling agents, titanium coupling agents, etc. may be selected and used from any conventionally known ones. it can. Among them, γ-aminopropyltrimethoxysilane, N-β- (aminoethyl)
Aminosilane such as -γ-aminopropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, epoxysilane, isopropyltri (N
-Amidoethyl, aminoethyl) titanate is preferred.

The shape of the rod-shaped portion 2 is basically circular in cross section, but may be any shape such as quadrangular, hexagonal, and oval in cross section. Also, the rod-shaped portion 2 can be solid as shown in FIG.
It can be hollow, as shown in FIG. When the rod-shaped portion 2 is hollow, by opening the upper portion and the lower portion of the rod-shaped portion 2, excess water in the ground can be drained and the ground can be stabilized. Further, as shown in FIG. 2 (C), a metallic rod-shaped body 2a may be incorporated. As the metallic rod-shaped body 2a to be installed in the rod-shaped portion 2, steel, copper, brass, bronze, aluminum, etc. can be widely used, but steel is generally used.

Further, it is desirable to form grooves 2b, 2b extending in the longitudinal direction on the peripheral surface of the rod-shaped portion 2. Groove 2
Material saving, pile 1 by forming b, 2b
It is possible to improve the pullout resistance by increasing the surface area of the pile, and to prevent the pile body 1 from slipping out by turning after driving, and in particular, the effect of preventing the dropout resistance from decreasing due to vibration is great.
It is possible to prevent the pile body 1 from coming out. Groove 2b,
2b is generally about 1 to 6.

On both sides of the upper end of the rod-shaped portion 2, plate-shaped members 5a, 5
b is formed so as to project along the length direction of the rod-shaped portion 2 to form wing-shaped portions 3a and 3b. The plate-shaped bodies 5a and 5b have a lower edge 6
a and 6b are inclined surfaces that rise toward the tip. By setting the lower edges 6a and 6b as the rising slopes, the civil engineering work sheet or the like can be accurately locked even when the civil engineering pile body 1 is placed with an inclination, and the wing-shaped portions 3a and 3b are It is possible to prevent breakage.

Further, the upper edges 7a, 7b of the wing-shaped portions 3a, 3b.
Are connected so as to be connected to the position of the upper end 8 of the rod-shaped portion 2 or slightly below it. Preferably, the upper end 8 of the rod-shaped portion 2 is higher than the uppermost portions of the upper edges 7a, 7b of the blade-shaped portions 3a, 3b. The upper end 8 of the rod-shaped portion 2 is connected to the upper edge 7 of the wing-shaped portions 3a and 3b.
By setting the height to be equal to or higher than a and 7b, it is possible to prevent the wing portions 3a and 3b from becoming an obstacle when the civil engineering pile body 1 is driven by using a hammer, a hook or the like.

The thickness of the plate-like members 5a and 5b is not particularly limited and can be arbitrarily formed.
It is generally thinner than the thickness of. In addition, the plate-like body 5
The ribs 9a, 6b are provided on the lower edges 6a, 6b of the ribs 5a, 5b in order to increase the mechanical strength and ensure the locking of the civil engineering sheet.
It is desirable to form 9b so as to project on both surfaces of the plate-shaped bodies 5a and 5b.

A barbed portion 4 is continuously provided at the lower end of the rod portion 2. The barbed portion 4 is formed in a cone shape whose cross section widens upward. The cone shape may be a cone shape or a pyramid shape. In the present invention, a cutout part of which is formed by forming a groove in a conical body or a part of which a projection is formed is included in a conical shape as a modified conical shape.

Generally, as shown in FIG. 3, the upper portion of the barbed portion 4 is extended from the peripheral surface of the rod-shaped portion 2 so that the pile body 1 after driving is prevented from coming off, and a hooked portion 4a is formed. It
In addition, the umbrella-shaped body 10 made of metal can be fitted and attached to the tip of the arrow-shaped portion 4 if necessary.

The length of the synthetic resin pile 1 for civil engineering of the present invention,
The thickness can be arbitrarily selected according to the purpose, but generally, the pile diameter is 5 to 80 mm and the pile length is 250 to 2500.
It is about mm.

The thus obtained synthetic resin pile body 1 for civil engineering
When laying a civil engineering sheet by using, for example, when laying the civil engineering sheet 11 for land reclamation of soft ground, as shown in FIG. 4, the civil engineering sheet 11 has its edges overlapped on the ground 12. It is possible to connect the civil engineering sheets 11 and fix the civil engineering sheets 11 at the same time by laying the piles and laying the civil engineering piles 1 in the overlapping portion with a hammer, a hammer, a pile driving machine, or the like. Of course, it is also possible to drive the civil engineering work pile 1 to the center portion of the civil engineering work sheet 11 and fix it, if necessary.

Further, as shown in FIG. 5, the civil engineering sheet 11 is laid by a protection sheet for protecting a bank 13 such as a bank, cut soil, embankment, natural slope, or a weed-proof sheet. It can be used for laying the seat 14 of. When placing on a slope such as cut or embankment, it is desirable to place it in a direction orthogonal to the maximum dangerous slip surface.

In particular, as shown in FIG. 6, a sheet 14 such as a woven cloth or a mesh is laid on the surface of a sloped surface, a cut surface or the like 13 having a weathered or softened surface layer 15 to protect and strengthen the surface. In this case, it is preferable to drive the synthetic resin civil engineering work pile body 1 densely, and by collapsing it densely, collapse of the soil layer can be prevented and a reinforced soil layer can be formed. .

Geogrid 1 for stabilizing the embankment 17
When it is used to fix 6, as shown in FIG. 7, soil is set to a predetermined thickness to form the embankment 17a, the geogrid 16 is laid, and the pile 1 for civil engineering is laid. After fixing the geogrid 16, the operation of forming the embankment 17b again and laying the geogrid 16 is repeated a predetermined number of times so that the embankment of a predetermined height can be performed.

Furthermore, there is known a method of reinforcing and strengthening the soft ground, slopes or slopes by driving a large number of piles on the soft ground, soft slopes or slopes. 1 is also suitable as a pile for such a construction method. Further, a large number of piles 1 can be individually driven on the slope of the embankment, the natural slope, etc. to prevent landslides. In particular,
As shown in FIG. 5 and FIG. 6, the integration by the combined use with the mesh body can obtain an excellent reinforcing and reinforcing effect.

[0034]

EFFECTS OF THE INVENTION Since the present invention has such a constitution, it is possible to obtain a pile for civil engineering which is inexpensive, bulky, lightweight, easy to carry, has no rust, has high strength and is highly safe. You can

[Brief description of drawings]

FIG. 1 is a perspective view showing a synthetic resin pile body according to the present invention.

FIG. 2 is a sectional view showing an example of a rod-shaped portion.

FIG. 3 is a perspective view showing a barbed portion.

FIG. 4 is a vertical cross-sectional view showing a case where the synthetic resin pile body of the present invention is used for land reclamation on soft ground.

FIG. 5 is a perspective view showing the case where the synthetic resin pile body of the present invention is used for strengthening slope protection.

FIG. 6 is a perspective view showing another example in which the synthetic resin civil engineering work pile of the present invention is used for strengthening slope protection.

FIG. 7 is a longitudinal sectional view showing a case where the synthetic resin civil engineering pile of the present invention is used for embankment work.

[Explanation of symbols]

1: Pile for civil engineering made of synthetic resin 2: Bar part 3a, 3b: Wing portion 4: Arrowhead 4a: Hook 5a, 5b: plate-like body 6a, 6b: lower edge 7a, 7b: upper edge 9a, 9b: rib 10: Umbrella 11: Civil engineering sheet 12: Soft ground 13: Slope 14: Sheet 15: Weathered and weakened surface layer 16: Geogrid 17: Embankment

Claims (6)

[Claims] 1. A plate-like body having a lower edge which is an inclined surface that rises toward the tip and an upper edge which is connected to the upper end of the rod-like portion or slightly below the rod-like portion above the rod-like portion. Characterized in that a wing-shaped portion is formed by continuously connecting along a length direction of the portion, and a pyramidal body whose cross section widens toward the upper portion is continuously formed below to form a barbed portion. Pile for civil engineering made of synthetic resin. 2. The synthetic resin civil engineering pile according to claim 1, wherein a plurality of grooves extending in the lengthwise direction are formed on the peripheral surface over the rod-shaped portion and the barbed portion. 3. The synthetic resin civil engineering pile according to claim 1, wherein the rod-shaped portion, the wing-shaped portion, and the barbed portion are integrally formed of a synthetic resin containing an inorganic filler. 4. A synthetic resin civil engineering pile according to claim 3, wherein the inorganic filler is glass fiber, carbon fiber or whiskers. 5. The synthetic resin civil engineering pile according to claim 1, wherein the rod-shaped portion is internally provided with a steel rod-shaped body. 6. The synthetic resin civil engineering pile according to any one of claims 1 to 5, wherein a metal umbrella-shaped body is fitted to the tip end portion of the barbed portion.