SELF-WEIGHT-SETTLING CAISSON CONSTRUCTION METHOD AND UNDERGROUND STRUCTURE CONSTRUCTED BY THE SAME

摘要

PROBLEM TO BE SOLVED: To effectively, stably and inexpensively settle a caisson regardless of soil property in constructing an underground structure where a skeleton structure of a caisson is constructed above the ground and settled by a self weight as inner bottom surface of the caisson is excavated.

SOLUTION: A skeleton caisson is provided with, at a bottom thereof, a leading wedge having a shape of an inverted triangle made of at least partially a metal. The leading wedge is configured so that: an angle of a sharp tip thereof as well as the angle between an outer surface of a rising portion and a vertical line are prescribed; an inner rising portion has a bended portion inwardly extending with the angle perpendicular to the vertical line; and at least the outer and inner rising portions as well as the bended portion are made of the metal. Also, a concrete part of the caisson and the concrete part inside the leading wedge are integrated.

COPYRIGHT: (C)2012,JPO&INPIT