JPS6040661Y2 - Covering sheet for the revetment surface on the reclaimed side - Google Patents

Description

[Detailed description of the invention] This invention forms a transparent window for water drainage and a transparent window for air ventilation in the lower part of the impermeable sheet and near the shoulder, and a closing plate large enough to close the transparent window. This relates to a covering sheet for a revetment surface on the reclaimed side, in which one end of a plurality of ropes with slack is fixed and the other end of the plurality of ropes with slack is fixed to the impermeable sheet. In addition to eliminating differences in sea level, the covering sheet can be prevented from floating or being stirred up, and the seawall on the back side of the covering sheet can be prevented from collapsing.

Conventionally used covering sheets for the revetment surface on the reclaimed side do not have water passage or ventilation devices, so they can be lifted up or agitated by waves and wind pressure from the sea side, causing damage and the collapse of the revetment on the back side of the revetment sheet. However, as a result of various experimental studies, the present inventor has developed the present invention which does not have these drawbacks.

Embodiments of the present invention will be described below with reference to FIGS. 1, 2, and 3. The slope 3 and the top surface 4 of a revetment 2 made of split rocks thrown into the reclaimed side of the reclamation embankment 1 are shown below. A transparent window for water drainage is provided in the lower part 6 and near the shoulder 7 of the impermeable sheet 5 such as a polyvinyl chloride sheet or polyethylene sheet with a thickness of 2 to 10 mm, a width of 1 to 3 mm, and a length of 2 to 20 r71. A closing plate 1 formed of the same material as the impermeable sheet 5 and sized to close the transparent windows 8 and 9 for air venting.
One end of a plurality of ropes 12 having a slack of 11 to 0 is fixed by an appropriate fixing means, and the other end of the rope 12 is fixed to the impermeable sheet 5 by an appropriate fixing means.

The impermeable sheet 5 is connected to the left and right sides by suitable connecting means to cover the entire length of the slope 3 and top surface 4 of the landfill side revetment 2 of the reclamation embankment body 1, and also has a transparent window for air venting. 9 may be formed on the portion of the impermeable sheet 5 that covers the top end surface 4.

This invention passes through the reclamation embankment body 1, the revetment 2, and the slope 3 of the revetment 2.
The seawater that has reached this level passes through the water drainage transparent window 8, presses the closing plate 10, moves the closing plate 10 by the slack 11 of the rope 12, flows into the landfill side through the created gap, and floats the impermeable sheet 5. This eliminates the difference in sea level between the sea side and the reclaimed side without causing any disturbance, and when the air inside the reclamation embankment body 1 and seawall 2 is compressed by wind pressure or waves from the sea side, the air This prevents the water from flowing out by pushing up the closing plate 10 through the drainage window 9 and causing the impermeable sheet 5 to float or stir, and when the water level on the reclaimed side increases as the landfill progresses, the drainage window 8 is closed by a closing plate 10, and the water is gradually discharged from the bottom of the water through a small gap at the connection part of the impermeable sheet 5, so that there is no outflow of earth and sand.

The present invention forms a transparent window 8 for water drainage and a transparent window 9 for air ventilation in the lower part 6 of the impermeable sheet 5 and near the shoulder 7, and the transparent window 8
, 9, one end of a plurality of ropes 12 having slack 11 is fixed to a closing plate 10 large enough to close the plurality of ropes 10, and the other ends of the plurality of ropes 12 having slack 11 are fixed to the impermeable sheet 5. Since it is a covering sheet for the revetment surface on the reclaimed side, it eliminates the difference in sea level between the sea side and the reclaimed side, stably holds the stretched impermeable sheet on the slope 3 and top surface 4 of the revetment 2, and also reduces wind pressure. The impermeable sheet 5 does not float or stir due to waves, and the seawall 2 is not damaged due to this floating or stir, and if the water level on the reclaimed side rises, the transparent window 8 for water drainage is closed by a closing plate. Transparent window 8 for water drainage closed by 10
Only a small amount of water leaks from the tank, and the seawall 2 will not collapse.

Another embodiment shown in FIGS. 4 and 5 has one side 1 of the closing plate 10.
0' is fixed to the impermeable sheet 5 by welding or other suitable fixing means, and the lower part is rotated and opened by wind pressure and water pressure from the seawall 2 side. The operation and effect are the same as in the above embodiment.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part in use, Fig. 2 is a plan view of the main part, Fig. 3 is a sectional view taken along the line A-A in Fig. 2, and Fig. 4 is a plan view of the main part of another embodiment. FIG. 5 is a sectional view taken along the line B--B in FIG. 4. 5... Impermeable sheet, 6... Lower part,
7...Shoulder, butt...Transparent window for draining water, 9.
... Transparent window for air vent, 10 ... Closing plate,
11... slack, 12... tap.

Claims (1)

[Scope of utility model registration request] A transparent window 8 for water drainage and a transparent window 9 for air ventilation are formed in the lower part 6 of the impermeable sheet 5 and near the shoulder 7, and a closing plate 10 having a size to close the transparent windows 8 and 9 is provided with slack. 11, and the other ends of the ropes 12 having the slack 11 are fixed to the impermeable sheet 5.