| 摘要 |
PROBLEM TO BE SOLVED: To prevent a water shielding sheet from being damaged or sliding downwards due to damages even when the load of waste deposited in an accumulation place and a treated soil layer, etc., is added to the water shielding sheet and tension to a side lower part acts and to prevent the function of the facilities of a waste disposal place or the like from being impaired. SOLUTION: In the facilities where a recessed part 2 is formed on the ground 1 and the water shielding sheet 6 is laid on the recessed part 2, the middle of the upper part of the water shielding sheet 6 is folded along a peripheral direction and the folded part is picked with this picking tool 10 and turned to the pulling stretch margin 11 of the water shielding sheet 6. For the downward tension to the water shielding sheet 6 accompanying load increase by the accumulation of fed objects in the recessed part 2, the picking tool 10 is loosened, the pulling stretch margin 11 is appropriately pulled out in a pulling direction and the laying length of the water shielding sheet 6 is adjusted.
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