Publication Abstract

Proceedings of the Deep Mixing 2015 Conference, (DFI)

Mixing Proportion Design and Construction Management for Application of Cement Deep Mixing Method to Construction Project on Controlled Final Landfill Site in Japan
Kenji Sasa, City of Yokohama Port & Harbor Bureau, Japan; Yoshinori Kurumada, Penta-Ocean Construction Co., Ltd., Japan; Masaya Watanabe, Penta-Ocean Construction Co., Ltd., Japan

The Port of Yokohama is strengthening its international competitiveness as a strategic container port in order to respond appropriately to global exchange and shipping demands. Thus, the Minami Honmoku main Pier is currently being developed. The high-standard container terminals MC-1 and MC-2 have already started their service, and the development of the container terminals MC-3 and MC-4 is currently in progress. Because the South Honmoku Pier plays an important role in waste disposal management of Yokohama, a final waste disposal site (controlled final landfill site) is being developed in Block 5 to provide long-term and stable reception of waste that will be generated in the city. For this project, a revetment with water-blocking properties and an extension approximately 1.7 km in length is being built in order to prevent water from leaking from the disposal site. The base part of the revetment will be subjected to foundation improvement using the Cement Deep Mixing (CDM) method in order to secure water shielding of the soft sediment underneath the water, prevent slipping of the seawall, reduce the amount of subsidence, and increase the foundation support force. This report presents a preliminary study on using CDM on reclaimed soil and the construction process of the development project of the disposal site in Block 5 of the Minami Honmoku Pier, which has been underway since 2007.

 article #2041; publication #1013 (DM-2015)