| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a device capable of effectively and quickly draining water accumulated between a first and a second impervious sheets. <P>SOLUTION: A drain device 1 for an impervious structure, where impervious sheets 37 and 39 are doubly laid on an inner surface of a water shielding object 31, comprises: a water collection section 6 which is installed at a lowest section 33 of the water shielding object 31, communicated with a space between a first and a second impervious sheets 37 and 39, and kept in an air tight state; a gas introduction means 25 which is installed at least one location in the water shielding object 31 to introduce air or gas having pressure higher than the air into the space between the first and the second impervious sheets 37 and 39; and a drainage means 15 which collects water from the space between the first and the second impervious sheets 37 and 39 into the water collection section 6 by reducing the pressure therein and drains the water out of the water collection section 6 by suctioning the collected water. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
