| 摘要 |
PROBLEM TO BE SOLVED: To provide the improvement method for a soft ground and the construction method for a structure in the soft ground, in which no settlement, landslide, elevation and ground collapse is generated in a ground in the periphery of a ground to be improved, the vibrations and noises of construction works are lowered and accuracy and safety are obtained and cost can be reduced. SOLUTION: The soft ground S is excavated in critical height of approximately 1.5 m, a plurality of small-sized pontoons 2a are floated on the excavated soft ground S, these pontoons are connected by connecting members 2b and a hull 2c is formed, a travelling rail 2e is laid on the hull, a traversing base 2d is placed on the travelling rail, and a soft-ground improving machine 2f is installed onto the traversing base. The hull 2c is moved by a winch 2 m mounted at a remote place at that time, the soft-ground traversing machine 2f is traversed and beltlike soft-ground improvement is conducted, the hull 2c is moved forward and the beltlike soft-ground improvement is performed similarly and the ground is improved, and a structure is constructed after the curing of the ground.
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