| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for forming a skeleton structure caisson, which can sink by own weight depending on excavation of ground under the inside of the caisson, on a ground and making the same to stably sink by the excavation, upon structuring an underground structure. <P>SOLUTION: In a caisson sinking method, a suitable spacing is provided between a ground wall surface formed by the outermost peripheral part of a leading blade in a lower part of a caisson and an outer peripheral surface of the caisson (a caisson forming form, a caisson wall concrete surface, or a protective layer surface formed on the caisson wall concrete surface), and an aggregate layer is formed in the spacing to decrease friction when the caisson is sinking. Accordingly, the caisson sinks stably by its own weight. <P>COPYRIGHT: (C)2012,JPO&INPIT |
