JPH0657949B2 - Method for manufacturing earthwork frame - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a frame for earthwork used for slope greening foundation work, embankment work and the like.

[Conventional technology]

As a conventional frame of this type, there is one described in JP-A-56-16730.

This frame has a rigidity that allows it to stand by passing water such as a plastic net or a metal net, and flexibility that allows it to be bent manually, and a flat plate having water resistance and durability is cut into a predetermined width. Items are overlapped and alternately joined at regular intervals,
It is a frame body that allows square cells to be continuously formed when extended, and is laid in a state of being extended on the slope,
It is used for slope revegetation foundation work, etc., where the slope is secured by anchor pins on the slope and then the soil is excavated.

[Problems to be solved by the invention]

The frame used for earthwork such as slope revegetation foundation work and embankment has unevenness on the ground surface on which it is installed, so gaps are likely to form between it and the ground surface.
In addition, since the soil is thrown into the installed frame body to roll it, the frame body resists deformation when throwing in soil and rolling,
In addition, it is necessary to maintain sufficient flexibility to follow the unevenness of the ground surface. At the same time, when it is installed on an unstable slope such as a slope, it is also necessary to maintain the self-supporting property to maintain its shape during the work at the time of loading the soil.

Although the conventional plastic net material and metal net material have their own flexibility, they cannot stand on their own without fixing each intersection to the ground surface by piles, blinds, etc., and their workability was very poor. That is, the conventional frame body does not maintain flexibility and self-supporting property suitable for earthwork by itself. Furthermore, since the conventional frame body uses a plastic net material or a metal net material, the joining method is heat fusion, welding, or a method of connecting using a connecting metal fitting, which improves productivity. It was difficult to raise.

This invention uses paper, non-woven fabric or cloth as a base material and has the flexibility and self-supporting property required as a frame body used for earthwork. An object of the present invention is to provide a highly productive manufacturing method of a frame body for earthwork used for slope greening foundation work or embankment work.

[Means for solving problems]

In order to achieve the above-mentioned object, according to the method for manufacturing a frame for earthwork used for slope greening foundation work or embankment according to the present invention, a plurality of base materials made of paper, non-woven fabric or cloth are bonded together. Then, when it is extended, it is impregnated with a thermoplastic resin after it is formed into a frame body in which polygonal cells are continuously formed.
The frame body is characterized in that it retains both self-supporting property and flexibility, and further, after a base material made of paper, nonwoven fabric or cloth is impregnated with a thermoplastic resin, a plurality of the base materials are provided. It is characterized in that it is formed by bonding to a frame body in which polygonal cells are continuously formed when extended, and the frame body retains both independence and flexibility. ,
A frame is constructed by laminating a plurality of base materials made of paper, non-woven fabric or cloth, impregnated with a thermosetting resin, and then the frame is held in an expanded state and cured by irradiation with an electron beam or ultraviolet rays. Is provided so that the frame body retains both independence and flexibility.

[Action]

Since the paper, the non-woven fabric and the cloth constituting the frame are adhered using an adhesive, it is possible to carry out each of the steps of applying the adhesive, laminating, impregnating the resin, spreading and curing as a continuous step. The frame can be manufactured with high productivity.

Example of Invention

 First, the frame body according to the present invention will be described.

FIG. 1 is a plan view of a structural example of a frame body (1) manufactured according to the present invention, and FIG. 2 is a side view thereof. Tape-shaped kraft paper with a width D, paper such as paperboard, non-woven fabric or cloth. A base material (2) such as is bonded on a wide surface so that a hexagonal cell (3) having a side length of W is continuously formed when extended, and a thermosetting resin such as unsaturated polyester Is applied or vacuum impregnated and then heat-cured in an expanded state or impregnated with a thermo-flexible resin.

The tensile strength, bending rigidity, size of the cell (3), height D of the frame body (1) and the like required for the frame body (1) vary greatly depending on the construction mode, but the height D (base The width of the material (2) is 5 to 10 cm, and the length W of one side of the cell (3) is 5 to 20 c.
m, one frame (1) has a width W of 40 to 150 cm and a length L of 1 to
A size of 5 m and a thickness of the base material (2) of about 0.1 to 2 mm is an appropriate range from the characteristics of the raw material and from the workability during construction.

A phenol resin, an epoxy resin, or the like can be applied to the thermosetting resin with which the base material (2) is impregnated, and polyethylene, polypropylene,
A thermoplastic resin such as polyvinyl chloride can also be used, and in this case, the frame body can have a large flexibility so that it can be folded.

Further, the amount of the synthetic resin impregnated is sufficient as long as it can stand on its own when the frame is laid on a slope, etc. Therefore, it depends on the thickness of the base material used, the size of the cells to be formed, etc. Since it depends on the properties of the synthetic resin used, it is necessary to treat the frame body so that it has appropriate rigidity and flexibility according to the purpose of use.

Next, an embodiment of a method for manufacturing a frame body according to the present invention using a paperboard having a thickness of 1 mm as a base material (2) will be described.

(A) First, make a crease with a width W on a regular-sized paperboard.

(B) Next, every four folds are coated with an adhesive, and a predetermined number of sheets are overlapped by alternately shifting so that hexagonal cells are formed when the folds are extended.

(C) Next, the frame body (1) which is not impregnated is obtained by cutting with a width D.

(D) Next, with a plurality of the frame bodies (1) stacked, the unsaturated polyester resin is vacuum-impregnated.

(E) Next, squeeze between the rollers, or press a flat plate with a large number of layers stacked to remove excess resin. If this product is left for one day, it will be dry to the touch, and it will be easier to handle thereafter, and the finished surface of the frame will be improved.

(F) Next, the resin-impregnated base material is extended and held by a jig, heated in a hot-air oven for several minutes to be cured, and then removed from the jig to complete the frame (1).

The steps (a) to (c) until the unimpregnated frame body (1) having the width D is obtained are not limited to this example. For example, the paperboard is previously cut into the width D and the base material ( Make a crease in 2) for each width W, and apply an adhesive on each of the fourth surfaces,
Alternately shift the base materials (2) and stack a predetermined number of them,
You may make it press and bond.

Further, the impregnation of the resin is sufficient if the base material (2) is thin, simply by dipping or applying.

Further, the impregnation of the resin is not limited to the one after the base material (2) is adhered to form the frame body, and the paperboard is vacuum-impregnated in a standard size or cut into the width D to obtain an excessive amount. After removing the resin, the frame body (1) may be formed by adhering it to a touch-dried state by leaving it for about one day.

When a thermoplastic resin is used, it can be bonded by forming it in the shape of a frame and then impregnating it, or by impregnating a tape-shaped substrate and then pressing the parts to be bonded together and heating them. it can.

The thermosetting resin can be cured by electron beam irradiation in a few seconds, and when the substrate is thin such as kraft paper or nonwoven fabric, it can be irradiated with ultraviolet rays.

When an ultraviolet curable resin is used, it is also possible to develop a frame body that has not been subjected to a curing treatment on a slope or the like and cure it by irradiating it with ultraviolet rays from sunlight.

FIG. 3 is a plan view of another structural example of the frame body (1) manufactured according to the present invention, in which the connection base material (2b) is provided between the base materials (2a).
Are arranged in a staggered manner, and the base material (2
It is bonded to a) and the cell (3) is attached to the connecting base material (2b).
The base material (2a) receives the weight of the soil filled therein and receives these loads as tensile loads. This frame body (1) does not cause the entire deformation of the frame body (1) even if the connection base material (2b) is peeled off, and the connection base materials (2b) are arranged in a staggered manner. The familiarity with the slope when laying on the cut slope is
It is as good as the hexagonal cell shown in FIG.

FIG. 4 is a plan view of still another configuration example of the frame body, in which the connecting base material (2b) is arranged on the same line to form a rectangular cell (3). ) Has a large flexural rigidity, so it is not suitable for laying inside a embankment.
The frame body (1) constructed in a) can be used.

It should be noted that the frame body (1) may be provided with appropriate size and number of water passage holes at appropriate positions (for example, in the vicinity of the apex angle when the cell (3) has a hexagonal shape). Good.

Next, the slope greening method using the frame manufactured according to the present invention will be described. FIG. 5 is a perspective view of a slope surface subjected to slope revegetation using the frame body according to the present invention, and FIG. 6 is FIG.
In the cross-sectional view taken along the line VI, (4) is the cut slope, (5) is the embankment, (6) is the embankment slope, (7) is the road, (8) is the slope (4), (6). An anchor made of metal or synthetic resin that is driven into the slope to fix the laid frame (1),
When the frame body (1) forming the hexagonal cell shown in FIG. 1 is used, it is mounted so as to be supported at the apex of the hexagon. The frame body (1) is laid so that the sides where the base materials (2a) and (2b) are overlapped and adhered are aligned with the longitudinal direction of the slope. By doing so, it is possible to obtain a rational structure that can withstand the tensile stress applied to the frame body at the double side having a large tensile strength, which is adhered on a wide surface. The adjacent frame (1) is
The base materials (2) that are in contact with each other are bound together by a stapler or the like, or they are bonded together by an adhesive to integrally connect them.

In this way, after laying the frame body (1) on the entire slope surface, or after seeding in each cell (3) of the frame body (1), or
Soil mixed with seeds and fertilizer is filled in the cell by the spraying method or is made into soil by the vegetation bag method. In this case, it goes without saying that the soil should be kept so that the frame is not pushed down.

Since the frame body (1) according to the present invention retains its strength for several years, it is possible to prevent the soil from flowing away until the slope is covered with grass.

The greening of the embankment slope can be performed according to the greening of the cut slope, but in general, the slope is gentle compared to the cut slope, and the unevenness of the slope is small, so the thickness D is small. It is suitable to form a rectangular cell (3) having a large bending rigidity as shown in FIG.

〔The invention's effect〕

A method of manufacturing a frame body according to the present invention, a plurality of base materials (paper,
Non-woven fabric or cloth) is attached to form a frame that continuously forms polygonal cells when stretched, and then impregnated with a thermoplastic resin or a base material impregnated with a thermoplastic resin is overlaid. In the manufacturing method in which the parts to be joined and bonded are heated under a pressure-bonded state to be bonded to form a frame body, and in the case of a frame body impregnated with a thermosetting resin, a plurality of bases are used. After bonding the materials to form a frame, it is impregnated with a thermosetting resin, and then the frame is held in an extended state to carry out curing treatment, so all steps are performed continuously. Since it can be applied, a frame body having paper, non-woven fabric or cloth as a base material can be produced with high productivity.

[Brief description of drawings]

FIG. 1 is a plan view showing the shape of a frame body produced by the present invention when it is extended, FIG. 2 is a side view taken along the line II-II in FIG. 1, and FIGS. 3 and 4 are frame bodies, respectively. FIG. 5 is a plan view showing another configuration example of FIG. 5, FIG. 5 is a perspective view for explaining a slope greening method using this frame, and FIG. 6 is a sectional view taken along the line IV-IV in FIG. (1) …… Frame, (2), (2a) …… Tape-shaped substrate, (2b)…
… Continuous material, (3) …… cell. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (3)

[Claims] 1. A plurality of base materials made of paper, non-woven fabric or cloth are pasted together to form a frame body in which polygonal cells are continuously formed when expanded, and then impregnated with a thermoplastic resin, A method for manufacturing a frame for earthwork, which is used for a slope revegetation foundation work or embankment, in which the frame body retains both independence and flexibility. 2. A base material made of paper, non-woven fabric or cloth is impregnated with a thermoplastic resin, and then a plurality of the base materials are stuck together,
Formed in a frame body in which polygonal cells are continuously formed when extended, and used for slope slope greening foundation work or embankment in which the frame body retains both independence and flexibility Method for manufacturing earthwork frame. 3. A frame body is formed by laminating a plurality of base materials made of paper, non-woven fabric or cloth, impregnated with a thermosetting resin, and then the frame body is held in an expanded state to obtain an electron beam or A method for manufacturing a frame for earthwork, which is subjected to a curing treatment by irradiation of ultraviolet rays so as to maintain both self-supporting property and flexibility in the frame, for use in a slope revegetation foundation work or embankment work.