| 摘要 |
<P>PROBLEM TO BE SOLVED: To smoothly and excellently drive a sheet pile in simple configuration. <P>SOLUTION: A partition frame 31 is inserted into bored first drilling 30, 32, ... and an inner area is partitioned by the partition frame 31. A continuous lap hole 40 is formed while maintaining the state where cobble stones or boulder stones are prevented from intruding into the inner area of the partition frame 31. Thereafter, the partition frame 31b in a portion interfering with a sheet pile 41 is extracted, and the sheet pile 41 is then driven easily into the continuous lap hole 40. <P>COPYRIGHT: (C)2013,JPO&INPIT |
