JPS6322174Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an erosion-prevention lining pine for protecting slopes, river revetments, etc.

[Conventional technology]

Conventionally, erosion prevention lining mats have been constructed by fixing heavy blocks made of concrete to the surface of a filter material that prevents the outflow of earth and sand and has water permeability. This conventional pine filter material is originally required to have the functions of preventing earth and sand from flowing out and having water permeability. However, a large number of heavy blocks are fixed to the surface of the filter material over a wide area, and as the lining pine has to be lifted and transported or laid, a large load from the heavy blocks acts on the filter material. do. Therefore, in order to withstand the load of heavy blocks, conventional filter materials are
Thick yarns are used, filter materials reinforced by weaving high-strength reinforcing yarns in a striped pattern as seen in Japanese Utility Model Application Publication No. 51-23339, or thin fabrics used as filter materials are used as supporting materials. By layering high-strength fabrics,
As seen in the publication, a filter material with a reinforcing material integrated on the back side was used. As the conventional filter materials are expensive, the mats are also unnecessarily expensive. Furthermore, as seen in Japanese Utility Model Application Publication No. 51-23339, in filter materials reinforced by weaving high-strength reinforcing threads such as polyester fibers in a striped pattern, the high-strength fibers are woven and therefore present in a curved manner. death,
Therefore, even if high-strength fibers are present, they have a relatively large elongation, and when attempting to hang the lining pine,
This is undesirable because it partially elongates at the part where the load is most applied, resulting in uneven block spacing and uneven density of the structure of the filter material.

[Problem that the invention attempts to solve]

The pine filter material conventionally used has been integrally reinforced as described above, making it expensive. This idea was devised in view of the above circumstances, and its purpose was to support a heavy block with support cables separate from the filter material.
To provide a lining pine which does not require reinforcement of the filter material itself, enhances the filter function, and can reduce costs.

[Means for solving problems]

In this invention, grooves are provided on the lower surface of the heavy load block, and a plurality of heavy load blocks, which are connected by inserting support cables into the grooves, are attached to the upper surface of the filter material that prevents the outflow of earth and sand. The lining mat for preventing erosion is characterized in that the supporting cables are arranged in a straight line and fixed, and both ends of the supporting cables extend outside the heavy blocks at both ends arranged in series.

In this invention, the load of the heavy block is supported by the support cables and does not act on the filter material, so the filter material used for this lining pine is one that has only water permeability and a filter function to prevent soil and sand from flowing out. For example, a rationally designed fabric suitable for its intended use, such as an unreinforced polyethylene fabric or a nonwoven fabric, can be used.

The support cables used in the lining mat of the present invention are preferably those that can withstand the load of the heavy object block and have a low elongation rate under load. If the elongation rate is large, the filter material may be elongated during hanging, and when it is laid, the intervals between the heavy blocks may become uneven, or distortion may be imparted to the filter material, which is undesirable. For example, tapes, strings, ropes, etc. made of synthetic resins such as polyethylene and polypropylene, or paper tapes reinforced with thin metal strips, wires, and steel wires are suitable. Among them, packing tapes made of polyethylene and polypropylene are low cost and high cost. It has high strength and low elongation, making it more suitable.

Embodiments of the present invention will be described below with reference to FIGS. 1, 2, and 3. In the drawing, the mesh is approximately
On the surface of a 150 cm wide filter material 1 made of 0.2 mm polyethylene fabric, heavy blocks 2 made of concrete are arranged in five rows in a straight line along the length direction of the filter material 1. A heavy concrete block 2 is fixed to the filter material 1 with an adhesive 3 on its lower surface.

The heavy object block 2 has a substantially rectangular parallelepiped shape, with a circular through hole 4 penetrating vertically in the center, 1/4 circular longitudinally long notches 5 in the four corners, and 1/2 in the center of each side.
A circular notch 6 that is long in the vertical direction is provided. Furthermore, a wide and shallow groove 7 is bored in the lower surface of each block 2, connecting the centers of two opposing sides in the longitudinal direction of the filter material 1. Since the heavy blocks 2 are arranged in a straight line along the longitudinal direction of the filter material 1, the grooves 7 on the lower surface of the heavy blocks 2 are also arranged in a straight line.
A supporting cord 8 made of polypropylene tape is inserted into the groove 7. Both ends of the support cable extend outward from the heavy blocks 2, 2 at both ends. This support rope 8 is fixed to the lower surface of the heavy object block 2 within the groove 7 with an adhesive 3, and is temporarily fixed to the filter material 1 with a stapler hardware 9 at a desired position between the heavy object blocks 2, 2. There is.

In manufacturing this lining mat, support cables are placed along the position where the approximate center line of the heavy blocks 2 should be located when the heavy blocks 2 are lined up in a straight line on the upper surface of the filter material 1. The strips 8 are fixed or temporarily fixed using stapler metal fittings 9, adhesive, sewing, etc., and the heavy blocks 2 are fixed on top of them with adhesive 3 while maintaining a predetermined interval, and the lining mat is made. able to make.

[Effect]

When transporting or laying the lining pine according to the present invention constructed as described above, both ends of the support cables 8 are gripped and lifted, and suspended. Therefore, as mentioned above, the load of the heavy object block 2 is supported by the support cables 8 and does not act on the filter material 1, so the filter material 1 used for this lining pine has good water permeability and dirt resistance as mentioned above. It is sufficient to have only a filter function to prevent leakage, and for example, a rationally designed fabric suitable for the intended purpose, such as an unreinforced polyethylene fabric or a nonwoven fabric, can be used. Furthermore, since the groove 7 is provided on the lower surface of the heavy load block 2, even if the support cable 8 is inserted, the heavy load block 2
The bottom surface is flat and the installation stability is improved.

[Effect of idea]

The lining pine of the present invention does not require the filter material to have the strength to support heavy blocks.
Only the filter function needs to be added. Further, during manufacturing, the support cables can be easily assembled and attached. Therefore, this lining pine can achieve high performance and low cost at the same time.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a lining pine according to an embodiment of the present invention, Fig. 2 is a vertical cross-sectional view of its side surface, and Fig.
FIG. 3 is a vertical cross-sectional view of the front main part of the figure. 1...Filter material, 2...Heavy block,
3...Adhesive, 4...Through hole, 5, 6...Notch, 7...Slot, 8...Support cable, 9...Stapler hardware.

Claims (1)

[Scope of utility model registration request] A groove is provided on the lower surface of the heavy object block, and a plurality of heavy object blocks are connected by inserting and fixing supporting cables into the groove, forming a straight line on the upper surface of the filter material that prevents the outflow of earth and sand. They are lined up and stuck together,
A lining mat for preventing erosion, characterized in that both ends of the support cables extend outside of heavy blocks at both ends in series.