JPH02210117A - Manufacture of block mat - Google Patents

Abstract

PURPOSE:To prevent an extreme dimensional error between blocks and the falling off of the blocks, from being generated even if the lifting or the like of the blocks is performed by bonding the concrete blocks to be solidified on the surface of filter cloth in a state that a tensile force is applied to the filter cloth and the cloth is stretched. CONSTITUTION:On the plywoods laid on a floor surface, filter cloth 4 is spread, and both the end sections are retained between two iron sheets 6, 6. After that, a wire rope 8 is hooked to the iron sheets 6, 6, and is stretched in both the directions, and in a state that it is stretched, on the filter cloth 4, concrete blocks 5 are bonded to be solidified at specified intervals. After they are solidified, and when the stretched state is released, then the filter cloth 4 shrinks, and a block mat in a state that spaces between the blocks are reduced is formed. As a result, even if a heavy load is applied to the blocks by the lifting or the like, the spaces between the blocks are hardly widened, and the generation of dimensional errors is reduced, and the blocks can be prevented from falling off or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a block mat for the purpose of protecting slopes and the like.

[Problem to be solved by the invention]

Block mats, which are made by adhering concrete blocks to the surface of a filter cloth made of synthetic fiber fabric to restrict the permeation of earth and sand, are widely used and laid on the ground surface for the purpose of protecting slopes, etc. Conventionally, the process shown in Figure 3 was used to manufacture block mats by bonding concrete blocks to filter cloth. That is, ■ Lay plywood 2 on a flat floor surface 1, ■ Cover it with a sheet 3 such as a vinyl sheet, ■ Spread a filter cloth 4 on top of it, and ■ Place a concrete block 5 on its surface with adhesive. It was glued.

In this conventional method, the filter cloth, which is wound into a roll, is simply laid out on a sheet, so the filter cloth has considerable elongation and, in some cases, wrinkles remain. Therefore, when a block mat made by gluing concrete blocks to a filter cloth in this state is transported or laid, the stretch that occurs in the filter cloth when lifting by grasping the edge of the mat creates gaps between the blocks. This has the disadvantage of increasing dimensional errors as a product.

Furthermore, if a block is glued and fixed onto a wrinkled filter cloth, the filter cloth will stretch when lifted as a block mat, destroying the adhesive layer and causing the block to fall, causing an accident.

This invention was made in view of the above-mentioned problems, and its purpose is to provide blocks that do not cause large dimensional errors between blocks even when a large load is applied during lifting, etc., and that prevent blocks from falling off. This article proposes a method for manufacturing mats.

[Means and Examples for Solving the Problems] This block mat manufacturing method is a method of manufacturing a block mat by bonding concrete blocks to the surface of a filter cloth, in which tension is applied to the filter cloth when bonding the concrete blocks. , characterized by being in a tense state.

The present invention will be explained below with reference to illustrated embodiments.

In Fig. 1.2, both ends (the drawing shows only one end) of the filter cloth 4 spread out on the plywood 2 laid on the floor 1 are sandwiched between two iron plates 6.6, respectively. Tighten with ten thousand cuffs and secure. Both ends of a wire rope 8 are tied to both ends of the iron plates 6, 6, and the central part thereof is hooked to a heavy pedestal 9. The wire rope 8 is tightened with a chain block (not shown) or the like, and the filter cloth 4 is tightened. Apply tension between both ends to create a tensioned state.

Concrete blocks 5 are adhered to the filter cloth 4 in this state while maintaining a predetermined spacing and arrangement. Once the adhesive has solidified and bonding is complete, the tension is released and the production of the block mat is completed.

The tension introduced into the filter cloth using this manufacturing method is preferably equal to the tension introduced into the filter cloth due to its own weight when the manufactured block mat is lifted by grasping the remaining ends of the filter cloth at both ends. It is.

The filter cloth is usually manufactured as a long woven fabric having a width of 1500 mm, and during manufacturing, tension may be applied in the length direction. Since the tension applied to the produced block mat is mainly in the length direction, there is no need to apply a particularly large tension in the width direction during production.

[For production]

This invention consists of the above configuration. In this manufacturing method, tension is introduced and the blocks are bonded to the filter cloth under tension, so when the tension is released after the blocks are bonded, the filter cloth contracts, making it possible to produce a block mat with tightly packed gaps between the blocks. . Even if tension is introduced into the block mat due to lifting or the like, the gaps between the blocks are unlikely to widen, resulting in small dimensional errors. For example, the conventional type produced a gap of about 1 to 2 cm, but the gap produced by this manufacturing method was only about 2 to 3 W. Also,
Since there are no wrinkles left in the filter cloth, there is no fear that the wrinkles will stretch out under the influence of tension, destroy the adhesive layer, and cause the block to fall.

〔Effect of the invention〕

The second invention is as described above, and according to this manufacturing method,
Even if tension is applied to the block mat due to lifting or the like, large dimensional errors will not occur between the bonded blocks, and troubles such as block mats falling off are unlikely to occur.

[Brief explanation of the drawing]

Figure 1.2 shows a plan view and a side view of the end of the filter cloth to which concrete blocks are bonded using this manufacturing method;
FIG. 3 is a side view of the end of a filter cloth bonded to concrete blocks using a conventional manufacturing method. 1... Floor surface, 2... Plywood, 3... Sheet m, 4...
...Filter cloth, 5...Concrete block, 6...Iron plate, 7...Vise, 8...Wire lob, 9...Pedestal.

Claims (1)

[Claims] (1) A method for producing a block mat by adhering concrete blocks to the surface of a filter cloth, the method comprising applying tension to the filter cloth to create a tensioned state when adhering the concrete blocks.