| 摘要 |
PURPOSE:To efficiently pressurize and permeate water underground earth, by a method wherein a strainer is located to the lower end of a casing for restoring water underground and an enclosed cover is situated to the upper end thereof, water is fed as the interior of the casing is pressurized, and a means for removing choking of the strainer is installed. CONSTITUTION:A strainer 2, having the same size as that of a casing, is attached to the lower end of the casing 3 for restoring water underground. The upper end of the casing 3 is closed, and the interior of the casing 3 is pressurized. Water is fed in the casing against the inner pressure thereof, and the water in the casing 3 is pressurized to permeate underground earth with the water in the casing 3. Meanwhile, a safety mechanism 6, which automatically drains pressurized water in the casing when a pressure in the casing 3 is increased to a specified value, is provided, and further a device 10, which removes choke making slide contact with the inner surface of the strainer in the casing 4, is installed. This enables water for preventing subsidence of land to be inexpensively and efficiently pressurized and restored in the ground. |
