| 摘要 |
PROBLEM TO BE SOLVED: To provide a restoration method of a structure in which the structure can be returned to the original location while using an existing underground structure and a soft ground around the underground structure can be stabilized at the same time to prevent subsidence of the ground in the future. SOLUTION: A rise control ruler 7 is laid between piles 3 on the ground above an underground structure 1a and a hydraulic device and a pressing member 9 are installed. A buoyant force acting on the underground structure 1a becomes larger than the weight by excavating soil above the underground structure 1a and removing it and hence, the underground structure rises. The upper and lower parts of the underground structure 1b after rising are filled with a light-weight backfill material 11. Finally, the whole part or a part of the rise control ruler 7, the hydraulic device, the pressing member 9, the piles 3, and ground anchors 5 is removed.
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