JPH03161611A - Method and device for continuously laying drainage material on bottom of water - Google Patents

Abstract

PURPOSE:To demonstrate a uniform drainage effect extending over the whole surface of a water-bottom ground by laying and arranging a beltlike drainage base material led out of a wind-up drum on a laying boat and a filter material while edge sections are superposed on the bottom of water. CONSTITUTION:A plurality of wind-up drums 3, 3' are disposed onto a laying boat 1 under the state in which they are displaced mutually in the progressive direction, and casings 7, 7 guiding beltlike drainage materials D, D' wound on and led out of these drums are installed. Shooters 8, 8' for throwing down a weight member such as crushed stone are mounted on the rear sides of the casings 7, 7'. The drainage materials D, D' composed of beltlike drainage base materials 4, 4 and filter materials 5, 5 are led out of the wind-up drums 3, 3' of the laying boat 1 which rectilinearly advances on water, and laid on the bottom of water under the state in which edge sections are superposed. The weight member is thrown down onto the drainage materials D, D', and the drainage materials D, D' are pushed stably against the bottom of water.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method and apparatus for continuously laying drainage material on an underwater ground such as a seabed or lake bed on which vertical drainage material such as sand pile has been constructed. It is. [Jubai's technique 1 Jubei's method of laying this type of drainage material is to continuously lay out strips of drainage material on the bottom of the water from a laying ship that moves straight ahead, and to place weight materials such as crushed stones on top of the drainage material. A method has been developed to stably lay drainage material by dropping it.

On the other hand, the present inventors have developed a belt-shaped drainage base material in which concavities and convexities are formed continuously and alternately, and a drainage base H that surrounds the drainage base village.
By installing ``cvJ.'' number of floating water II4 in parallel, it is possible to reduce the cost of expensive drainage bases. We have developed a drainage village that can achieve M-efficiency by reducing the amount of wood used, and can also ensure uniform drainage effects over the entire surface of the underwater ground. Problem 1 However, with the conventional installation method described above, it was not possible to simultaneously lay multiple rows of the drainage material developed above in parallel. The present invention has been made in order to solve the above-mentioned problem of lamination, and its purpose is to arrange a plurality of drainage materials in parallel with the extended portions of adjacent filter materials slightly overlapping each other. The purpose of this invention is to provide a method for continuously laying drainage material underwater and vLra. [Means for Solving the Problems 1] The method of continuously laying drainage material on the water bottom of the present invention is to lay a plurality of strips of drainage material on the water bottom surface from a straight-moving laying ship, and to spread out the edges of adjacent drainage materials. It is characterized in that it is laid in an overlapping state, and in that a weight member is dropped onto the drainage material laid on the water bottom surface to stably press the drainage material against the water bottom surface. be.
Further, the underwater continuous laying device for drainage material of the present invention includes a laying ship that moves straight on the water, a plurality of winding drums arranged on the laying ship in a state shifted from each other in the traveling direction, and windings on the winding drums. It is characterized by being composed of casings arranged to guide and guide each band-shaped drainage material that is being turned and pulled out to the bottom of the water, and being staggered from each other in the direction of movement, and further, a weight member is dropped on the rear side of the casing. It is characterized by having a chute along the side for use. The drainage material used in the above method and apparatus includes a strip-shaped drainage base material in which irregularities are formed in a continuous manner, and a filter material that surrounds the drainage base material and is provided at both ends of the drainage base material. Preferably, it is structured from [Example] An example of the present invention will be described below with reference to the drawings. In Figures 1 and 3, reference numeral 1 denotes a purge as a construction vessel, on which a pedestal 2 is rotatably and slidably mounted. On the pedestal 2 are two winding drums 3,
3' is installed, and band-shaped drainage materials D and D' are respectively wound around this. The drainage materials D and D' are composed of a drainage base material 4 and a filter material 5, as shown in FIG. The floating base material 4 is formed with concave and conical concave portions 4a that are alternately continuous, and spaces through which water can flow freely in all directions are formed on both sides, and the overall shape is It has flexibility.

Note that the shape of the uneven portion 4a is not limited to this, and may be any shape as long as it forms a free water passage space. In addition, through holes may be formed in the top surface of the uneven portion 4a, etc., within a range that does not impair the structural strength. Examples of the material for the drainage base material 4 include hard thermoplastic resins such as hard vinyl chloride, polystyrene, polyethylene, polypropylene, nylon, polyester, and ABS, but are not limited thereto. The filter material 4 may be made of fiber threads, woven fabrics, wrapped fabrics, or non-woven fabrics, either alone or in combination. Examples of m-fibers include natural fibers such as cotton, linen, and wool, metal, glass, and carbon fibers, recycled fibers such as cellulose, protein-based fibers, polyamide, polyester, polyolefin, and polyurethane. , polystyrene, polyvinyl chloride, polyvinylidene chloride, polyacrylic, polyvinyl alcohol, etc.! &a fibers, etc. can be used alone or in combination. In addition, the above-mentioned woven fabrics include plain weave, twill weave, satin weave, special fibers, etc., knitted fabrics include W4 knit, 9 knit, warp knit, special knit, etc., and non-woven fabrics include spunbond method, 21 dollar punch method, etc. Alternatively, there are paper-making methods, etc. Further, the filter material 5 is treated with a surfactant to impart hydrophilicity and is made to have a high 9L surfability. As surface-activating materials, for example, higher alkali acid salts, quaternary alkali salts, quaternary alkali acid salts, polyethylene glycone realyl ether, higher amine halodates, alkyl sulfonic acid salts, sulfosuccinic acid ester salts, etc. are used. do.

The drainage base 4 is surrounded by the filter material 5, and the filter material 5 has extending portions 5a extending from both ends of the drainage base 4.

It is preferable that the filter material 5 is joined by sewing the receiving part 5a' of the extending part 5a or by welding or cutting. In this case, do not obstruct the flow of water from Nobu, Yaku section 5a to Wamizu J, (4.4 4.\).

1 and 2 again, the winding drum 3' is positioned behind the winding drum 3 in the direction of travel of the burner 1 (arrow A), and these drums 3 ，
The extending portions 5a of the seven filter materials 5 of the drainage materials r) and r)' fed out from the drain material 3' overlap each other to some extent.

These drainage materials D and D' are rolled out from the winding drums 3 and 3' while being sandwiched between rollers 6t6' of 1 jt in the upper and lower sides, respectively. At the rear of the burner 1, a casing 7,7゛ is hung vertically into the water.
Drainage materials D and D' sent out from the rollers 6 and 6' are inserted into these, respectively, and the drainage materials D and D' sent out from the rollers 6 and 6' are inserted into the bottom of the water (sea IIE).
) will provide guidance and guidance. These casings 7 and 7' are also located offset in the direction of the rear no. Each of the casing arms 7' has a double cylindrical shape, and can be expanded and contracted in the vertical direction W! 4, and its lower end can always be kept at a constant distance (for example, 50c+n) from the bottom surface of the water. This casing 7,
A method for maintaining the lower end of barge 7' at a constant position from the water bottom is to detect the water depth of the barge 1 using a water pressure sensor (not shown) or the like in accordance with changes in the water level (tide level), water bottom ground surface, etc. The expansion and contraction of the casings 7, 7' can be automatically adjusted, or a ground ring (not shown) can be installed at the lower end of the casings 7, 7'.
may be attached and elastically biased so that the grounding ring is always in contact with the bottom surface of the water.

The drainage materials D and D' let out from the lower ends of the casings 7 and 7' are laid on the water bottom surface with their ends, that is, the ends of the filter materials 5a, overlapping each other as shown in the figure. (Refer to Fig. 4) Shooters 8 and 8' are respectively disposed in the rows of the casings 7 and 7', and the lower ends of the chutes 8 and 8' move downward as the lower ends of the casings 7 and 7' move downward. Flexible Ilg that can be expanded and contracted in the middle so that it can move up and down! It has been sent.

At the upper end of the computer 8, 8' there is a feed hole and a filler hole 9.
9' is arranged and belt conveyor 10.1 0'
The crushed stone G sent from the supply hopper 11 via the chutes 8 and 8' is fed into the chutes 8 and 8'.

Next, a method of laying the drainage materials D and D' on a predetermined water bottom by the above-mentioned laying M position will be explained.

First, the drainage materials D and D' are placed on the winding drums 3 and 3', and the unrolled portions are sandwiched between the rollers 6 and 6', and further inserted into the casings 7 and 7', and the tip of the part from the lower end of the casing 7, 7',
Crushed stone G is loaded into the supply hopper 11, and work preparation is completed.

Next, while operating the barge 1, the drainage materials D and D'' are paid out from the lower ends of the casings 7 and 7' and laid on the water bottom surface with the ends of the filter material 5a overlapping each other.

On the other hand, the crushed stone G discharged from the supply hopper 11 is sent backward by the belt conveyor 10.10', is charged into the chute 8.8' from the input hopper 9, 9'', and is loaded from the lower end of the chute 8.8' into the chute 8.8'. Immediately after, the drainage materials D and D' are discharged onto the drainage materials D and D', and the drainage materials D and D' are stably pressed onto the bottom surface of the water. If you set it up and open and close it incessantly, crushed stone G
are dropped onto drainage materials D and D' at intervals. Also,
The weight material is not limited to crushed stone G, but any weight material such as gravel, sand, steel slag, etc. may be used.

As described above, according to the installation method of the present invention, although the relatively expensive drainage base materials 4 are arranged at intervals, the bottom surface of the water is completely covered with the filter material 5. Since the water that has risen and been absorbed by the extended portion 5a of the filter material 5 moves in one direction of the drainage base material and is drained, the water can be drained evenly and there is no risk of subsidence. FIG. 5 shows another embodiment in which a comparatively strong auxiliary filter material 5' is surrounded around the drainage base material 4. It is effective when there is a risk of the inside being blocked. Figure 6 shows the drainage base material. 4 is lined up with two rows apart and covered with 7 Ilter material 5. In this case, although the width of the drainage material becomes wider,
The effectiveness of laying work is improved. In addition, the said drainage base village 4 is not limited to two rows, but may be one in which a plurality of rows are arranged. [Effects of the invention j 1) By laying a plurality of drainage materials side by side with the edges of adjacent drainage materials slightly overlapping each other, the amount of expensive drainage base material used can be reduced as much as possible and liX can be achieved. In addition to improving drainage efficiency, it is also possible to expect an even drainage effect over the entire surface of the underwater ground. 2) Installation work can be done reliably and efficiently. 3) Drainage material can be laid stably by dropping a weight member onto the drainage material that has been laid.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the continuous drainage material laying device of the present invention, Fig. 2 is a plan view of the main parts thereof, Fig. 3 is an explanatory diagram of the structure of the drainage material, and Fig. 4 is the laying state. FIG. 5 and FIG. 6 are cross-sectional views showing different embodiments of the drainage material. DESCRIPTION OF SYMBOLS 1... Purge, 2... Frame, 3.3'... Winding drum, 4... Drainage base material, 4a... Uneven part, 5...
...filter material, 5a...extension part, 5a'...base, 5'...sode support 7 router 114, 6,0'...
Roller, ma, 7'...casing, 8.8'...shooter, 9.9'...feeding honopa, 1 0.1 0'
...Belt conveyor, 11... (J'< Feed ho-/
P, A... Direction of purge progress, D, D'... Drainage material, G... Crushed stone. stomach

Claims (1)

[Claims] 1. A drainage system characterized by laying a plurality of strips of drainage material on the bottom surface of the water from a laying ship moving straight ahead, and laying the adjacent drainage materials with their edges overlapped. Continuous laying method of lumber under water. 2. Continuous laying of drainage material on the water bottom according to claim 1, characterized in that a weight member is dropped onto the drainage material laid on the water bottom surface to stably press the drainage material on the water bottom surface. Method. 3. A laying ship moving straight on the water, a plurality of winding drums arranged on the laying ship so as to be offset from each other in the traveling direction, and each strip of drainage material wound around the winding drums to be drawn out. 1. An apparatus for continuously laying drainage material at the bottom of the water, characterized in that it is comprised of casings arranged on the bottom of the water to be guided and guided and shifted from each other in the direction of travel. 4. The continuous underwater laying device for drainage material according to claim 3, wherein a chute for dropping a weight member is provided along the rear side of the casing. 5. The drainage material is characterized by comprising a strip-shaped drainage base material in which irregularities are continuously formed, and a filter material surrounding the drainage base material and extending on both ends of the drainage base material. The method or device for continuously laying a drainage material under water according to claim 1, 2, 3 or 4.