EFFECTS OF DENSITY AND CONFINING STRESS ON LIQUEFACTION RESISTANCE OF COARSE-GRAIED RECLAIMED SOILS USED FOR CONSTRUCTION OF MAN-MADE ISLANDS IN KOBE

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  • 神戸人工島における埋立土の液状化強度に及ぼす密度・拘束圧の影響
  • コウベ ジンコウトウ ニ オケル ウメタテド ノ エキジョウカ キョウド ニ オヨボス ミツド コウソクアツ ノ エイキョウ

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A series of undrained cyclic triaxial tests was carried out to investigate the effects of density and confining stress on liquefaction resistance of isotropically consolidated the coarse-grained reclaimed gravelly soil obtained from the reiquefied area on the man-made islands in Kobe (Port Island and Rokko Island). Test results shows the followings.<br>Reclaimed soil of Port Island is a granite-origin gravelly soil (locally called Masado-soil), that of Rokko Island is a mixed gravelly soil composed from mud stone-origin, tuff-origin and so on, and these reclaimed soils has a characteristics features of a high compressibility as the ground and the breakage of particle contacts. Although these coarse-grained soils contain a large portion of gravel, the liquefaction resistance is very low compared with that of the uniform and clean sand as Toyoura Sands and is depend on the density increased with the increasing confining stress.

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