| 摘要 |
PROBLEM TO BE SOLVED: To provide a countermeasure structure against liquefaction of a foundation for a construction, which can stably bear the construction even if the ground undergoes liquefaction, and is implemented by drastically reducing costs for the countermeasures against liquefaction and by drastically shortening a construction period. SOLUTION: The construction 4 is built on the ground 1 consisting of a liquidised stratum 2 and a non-liquidised stratum 3 under the same. Then a soil improving body 5 having a stratum thickness that is set so as to reduce a settlement of the construction 4 due to liquefaction of the liquidised stratum 2 to an allowable tolerance value or less, is formed immediately below an outer peripheral portion of the construction 4, but a region enclosed by the soil improving body 5 remains as an unimproved soil section 6. The soil improving body 5 need not be a continuous body as viewed in a plan but only composite ground consisting of the soil improving body 5 immediately below the outer peripheral portion of the construction 4 and the unimproved soil section 6 enclosed by the soil improving body 5 needs to have a predetermined equivalent shearing modulus. The soil improved bodies 5 may be arranged immediately below the outer peripheral portion of the construction 4 at predetermined intervals. COPYRIGHT: (C)2005,JPO&NCIPI
|
