PROJECT OF RESILIENT COASTAL LEVEE IN SENDAI BAY SOUTH COAST EXAMPLE OF INGENUITY ACCORDING TO THE SITE CONDITIONS IN IDOURA AREA

Abstract

 On the southern coast of Sendai Bay, coastal levees damaged due to the Great East Japan Earthquake Tsunami on 11^th March 2011 were restored as the "Resilient Coastal Levee". In Idoura area located on the northern side of the Natori River estuary, the restoration work with "CSG coastal levee" was completed in consideration of the precious natural environment such as landscape and ecosystem, as well as land acquisitions and availability of materials for levees etc.
 This paper reports case studies employed in Idoura area including process of solutions of challenges in construction of CSG coastal levee, design approaches applied for loose geological conditions, and adoption of CSG containing maximum 70% sand with diameter of 5mm or less (unit cement amount is 40kg/m³).