| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a construction method for preventing liquefaction of ground, which enables a high liquefaction prevention effect to be obtained by composite liquefaction countermeasures and which makes maintenance therefor easy and inexpensive.SOLUTION: In a construction method for preventing liquefaction of ground, cylindrical drain materials 2, 2... with water permeability are buried in a liquefaction layer 1; a suction pipe 4 is inserted into the cylindrical drain material 2; and groundwater is pumped through the suction pipe 4 to lower a groundwater level WL in the liquefaction layer 1. Subsequently, the groundwater level is restored to an approximately natural groundwater level NL to put the liquefaction layer 1 into an unsaturated state; the suction pipe 4 is extracted from the cylindrical drain materials 2, 2...; and the cylindrical drain materials 2, 2... are left in the liquefaction layer 1.</p> |
