JPH07103572B2 - How to lay a block mat - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of laying a block mat used for slope protection, and more particularly to a method of laying a long slope.

[Problems to be solved by the invention]

Conventionally, when laying and protecting a block mat, if the slope etc. is long in the vertical direction, it was necessary to make a block mat long in the vertical direction and lay it. However, in terms of transportation and construction, there is a limit to the length of the block mat, and if the slope is very long, it was not possible to handle it.

The present invention is intended to solve this problem. Even if the purpose is a long slope with a vertical direction of 20 to 30 m,
It proposes a method of laying block mats that enables construction of protection works using block mats with long slopes by successively laying short block mats of about 5 to 10 m.

[Means for solving problems]

The method of laying this block mat is such that a concrete block is fixed to the surface of a filter cloth made of synthetic fiber, and a block mat having extra ends that do not fix the block at both ends in its length direction is laid on the slope. The lower part of the upper block mat, which is orientated in the length direction of the block mats from the lower part of the slope to the upper part of the upper part of the upper part of the existing lower block mat, is installed in series and is laid in sequence. Are stacked, the lower end surplus portion of the upper block mat is cut, and the lower end block of the upper block mat is abutted against the upper end block of the lower block mat.

3. The laying method according to claim 2, wherein a vertical through hole is provided at the center of each concrete block, and the U-shaped anchor extends over the through holes of the two blocks of the upper and lower block mats that are abutted by the above laying method. It is characterized by hitting.

Hereinafter, description will be made with reference to the illustrated embodiment. FIG. 1 shows a block mat 1 used in this laying method, in which a substantially rectangular parallelepiped concrete block 3 is butted and affixed with an adhesive on the surface of a filter cloth 2 made of synthetic fiber woven fabric or non-woven fabric. Is configured. The block mat usually has a length of 200 to 900 cm and a width of 150 to 200 cm, and has an extra end portion 6 to which the block mat is not fixed, at both longitudinal end portions and one side edge. The lengthwise margin is 40 to 60 cm, and the side margin margin is about 10 to 30 cm in width. The concrete block 3 fixed to the block mat shown in FIG. 1 has a size of 20 × 20 × 10 cm (height), a through hole 4 in the vertical direction at the center, and a notch 5 with a semicircular cross section on the four side faces. The concrete block 3 has various other forms. FIG. 3 shows a block mat 1 in which a block 3 having dimensions of 30 × 20 × 15.5 cm (height) and having semicircular cutouts 5 on four sides is laid and fixed on the surface of a filter cloth 2. .

In order to form a slope protection work by laying this block mat on a long slope, as shown in FIG. 2, lengthen the block mat 1 from the lower part of the slope 7 to the upper direction and along the vertical direction of the slope. They are orientated in the vertical direction and are laid one after another in series (see Fig. (A)). At this time, the lower end portion of the upper mat 1-2 to be laid next is overlapped on the upper end surplus portion 6-1 of the lower mat 1-1 that has already been laid (see (b) figure). The surplus end portion 6-2 is bent along the upper surface of the upper end block 3 of the lower mat 1-1, cut at the height of the upper surface of the block 3 (see (c) figure), and the upper end block 3 of the lower mat 1-1 is cut. And a lower end block 3 of the upper block 1-2, a surplus end portion 6 left uncut.
Are arranged in abutment with a gap between them. Further, if necessary, the two blocks 3 and 3 arranged in abutment straddle the through holes 4 and 4,
Drive the U-shaped anchor 8 (see Figure (d)), or drive the U-shaped anchor 8 over the notches 5 and 5 of the two blocks 3 and 3 having a semicircular cross section to fix it (see Figure (e)). .

In the above embodiment, the lower end surplus portion 6 of the upper mat 1-2 is
-2 was cut at the height position of the upper surface of the block 3, but may be cut along the lower edge of the lower block of the upper mat 1-2.

[Action]

This block mat laying method consists of the above configuration,
A plurality of block mats can be used and sequentially laid to form a slope protection work. The upper and lower block mats that have been laid overlap with each other at the upper end of the lower mat, and the upper and lower blocks of the upper and lower mats are arranged in abutting relation, so that they behave like a single continuous mat and the laying stability is high. , The original mat protection function of the block mat can be demonstrated.

In addition, if a U-shaped anchor is driven into a block provided in abutment between the upper and lower mats and connected and fixed, the laying stability can be further enhanced.

〔The invention's effect〕

This block mat laying method makes it possible to form a protective work on a long slope by using a short block mat that is easy to handle and has excellent workability.

[Brief description of drawings]

FIG. 1 is a plan view of the block mat, FIG. 2 (a),
(B), (c), (d) and (e) are longitudinal sectional views showing a method of laying the block mat of the embodiment in the order of steps, and FIG. 3 is a plan view of the block mat of another embodiment. 1 ... Block mat, 2 ... Filter cloth, 3 ...
… Concrete blocks, 4 …… Through holes, 5 …… Notches,
6 ... surplus part, 7 ... slope, 8 ... anchor.

Claims (2)

[Claims] 1. A method of laying on a slope a block mat having a concrete block fixed to the surface of a filter cloth made of synthetic fiber and having an extra end not fixing the block at both ends in the length direction, the lower part of the slope From the above, a plurality of block mats are orientated in the length direction in the upward direction, laid in series and sequentially laid, and the lower end portion of the upper block mat laid above the upper end surplus portion of the existing lower block mat is overlaid, A method of laying a block mat, comprising cutting an excess lower end portion of an upper block mat and arranging a lower end block of the upper block mat to abut an upper end block of a lower block mat. 2. The upper and lower block mats 2 provided with a through hole in the vertical direction at the center of each concrete block and arranged in abutment with each other.
The method for laying a block mat according to claim 1, wherein a U-shaped anchor is driven so as to straddle the through holes of one block.