JPS631403B2 - - Google Patents

Description

[Detailed Description of the Invention] Conventionally, various construction methods have been adopted for the purpose of preventing uneven settling of rubble of underwater structures and scouring in areas with large waves or severe scouring, but all of them are complicated to construct. However, it was not always possible to achieve the intended purpose.

The present invention has been proposed to solve these problems, and involves laying a sheet whose tip is curved in a semicircular shape at the base of an underwater structure, and forming a sheet around the periphery of the rubble mound at the base. This invention relates to a rubble tip protection construction method characterized in that rubble is thrown between the pine and the tip of the pine that protrudes outward from the peripheral edge.

In the present invention, as described above, a sheet for stabilizing the base of an underwater structure is used, the tip of which is bent into a semicircular shape, and after the mat is laid at the base of the underwater structure, the base is stabilized. Since the debris is dumped between the peripheral edge of the rubble mound and the tip of the sheet that protrudes outward from the peripheral edge, the debris is disposed of by the semicircular part curved at the tip of the mound. The rubble thus held on the tip of the sheet prevents the tip of the rubble from falling off and scattering, and scouring is prevented.

At this time, the rubble and the rubble are compatible with each other and maintain a stable state in their natural state, the rubble and the sheet are made to fit well into the underwater ground, and the tips of the rubble are reliably protected.

As described above, according to the present invention, by using a sheet for stabilizing the base of an underwater structure with a simple structure in which the tip is bent into a semicircular shape, the base of the underwater structure can be stabilized with rubble without using a complicated device. The desired purpose can be achieved by simply dumping stones between the periphery of the mound and the tip of the sheet protruding from the periphery, shortening the construction period and reducing construction costs. be.

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

1 is a sand control sheet for stabilizing the foundations of underwater structures made of vinyl chloride, rubber, etc., and has a semicircular portion 2 curved at its tip. Note that the sheet 1
By appropriately selecting the material, the semicircular portion 2 can be easily processed and manufactured, and the fluctuation and damage of the sheet tip can be reduced. Note that 3 in the figure is a cable stretched between the main body of the sheet 1 and an anchor cable 5 made of polypropylene or the like that is connected and fixed to the locking pieces 4 arranged in a row on the tip edge of the semicircular part 2. This tension rope is made of shape-retaining polypropylene. Reference numeral 6 denotes an anchoring piece for the tension rope 3 disposed on the main body of the seat 1. (See Figure 3) Then, the sheet 1 is laid on the underwater ground 8 over the base of the underwater structure and the base of the rubble 7 around it (see Figure 1). , the rubble 9 is thrown between the tip semicircular portion 2 of the sheet 1 that protrudes from the rubble 7 (see FIG. 2).

The debris 9 thrown away in this way is held by the semicircular portion 2 at the tip of the sheet 1, and the debris 9 prevents the tip of the debris from falling off and scattering, thereby preventing scouring. .

Therefore, the rubble 9 is compatible with the rubble 7, and a stable state is maintained on the underwater ground 8 in a natural state,
The tip of the rubble 7 is reliably protected.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIGS. 1 and 2 are longitudinal cross-sectional views showing steps of an embodiment of the rubble tip protection method according to the present invention, and FIG. 3 is a partial slope view of the sheet. 1... Sheet, 2... Semicircular portion, 7... Rubble, 9... Miscellaneous stones.

Claims (1)

[Claims] 1. A sheet whose tip is curved into a semicircular shape is laid at the base of an underwater structure, and between the periphery of the rubble mound at the base and the tip of the pine that protrudes outward from the periphery. A rubble tip protection method characterized by throwing away rubble.