| 摘要 |
PROBLEM TO BE SOLVED: To provide the floating prevention structure for a buried construction capable of simply and surely preventing floating even when the construction is small-sized or one which does not require earth retaining by a circumferential sheet pile. SOLUTION: The bottom board outer face 12a of a common ditch 12 is made symmetrical on an axial center M, and made both side upward curved line shapes. A block layer 13a brought into contact with the bottom board outer face 12a performs a base board supporting the common ditch 12, and a support member such as a pile 14 is provided on the lower side. In addition, a block layer 13b is brought into contact with the side 12b of the common ditch 12. Even when excessive gap water produces in a ground at the time of an earthquake and collides with the bottom board outer face of the common ditch 12 according to the floating prevention structure, it is uniformly dispersed, smoothly flows in the water discharge passage 15a of the block layer 13a coinciding with the bottom board outer face of both the side upward curved line shape, enters the water discharge passage 15c of the block layer 13b brought into contact with the side 12b of the common ditch 12, climbs the water discharge passage 15c, and flows out on the ground through non-liquefaction ground 2c including crushed stone 18 or the like.
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