| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an anchor device for drain material that exhibits small resistance at drain material installation time and sufficient pull-out resistance at mandrel pulling-out time, and suppresses co-lifting of drain materials. <P>SOLUTION: The anchor device for drain material includes: a plate-like anchor plate 3 fitted to a ground insertion-side end of a drain material A; and an auxiliary plate 4 arranged to be overlaid on a ground insertion side of the anchor plate 3 and installed movably by a certain distance relatively to the anchor plate 3. At least one edge of the auxiliary plate 4 is arranged projecting outward from a periphery of the anchor plate 3. <P>COPYRIGHT: (C)2013,JPO&INPIT |
