In Japan, soft alluvial clay ground has frequently been encountered in on land and marine constructions, which is so soft and compressible that large ground settlement and failure are concerned. Sandy soil has relatively desirable properties for compressibility and stability, but liquefaction may happen during earthquake in a case of loose and saturated condition. In fact, port and harbor facilities at Kobe Port were heavily damaged in the 1995 Hyogoken-Nambu earthquake. In the earthquake, gravity type of sea revetments displaced a couple of meters toward sea together with large ground settlement at backfill yard. There are many kinds of soil stabilization techniques that were developed and available in Japan for countermeasure of stability, ground deformation and liquefaction. Among them, cement admixture stabilization techniques have frequently been applied to improvement of clayey and sandy soils. In this paper, some applications of three cement stabilization techniques to earthquake disaster mitigation are briefly introduced.
Subjects: cement stabilization technique, earthquake, disaster mitigation
Author: Masaki Kitazume, Prof.
Publisher: DFI, EFFC