Liquefied Sites of Geomorphological and Geological Features, during The 2011 off the Pacific coast of Tohoku Earthquake

-In Inagekaigan, Chibaplains-

Abstract

 The 2011 off the pacific coast of Tohoku earthquake caused widespread liquefaction. We mainly investigated, liquefaction concentrated. Geomorphologicall setting of mainly liquefaction traced fairway of the tideland, Inagekaigan, Chiba Prefecture. Geotechnical condition is sandy soil deposits, N-value less than 5. Especially, creek of the tideland is sandy soil and groundwater gather easily. Other type Liquefaction is generated on the boundary in reclaimed lands. These liquefaction generated the 1987 Chiba-ken Toho-Oki Earthquake.