Design and Long-Term Monitoring of Tokyo International Airport Extension Project Constructed on Super-Soft Ground |
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| Authors: | K Morohoshi K Yoshinaga M Miyata I Sasaki H Saitoh M Tokoro N Fukuda T Fujii K Yamada and M Ishikawa |
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| Institution: | (1) Ministry of Land, Infrastructure and Transport, Yokohama, Japan;(2) Fukken Co., Ltd., Fukuoka Branch Office, 2-17-19, Hakata-ekimae, Hakata-ku Fukuoka, 812-0011, Japan;(3) Fukken Co., Tokyo Branch Office, 3-8-15 Iwamoto-cho, Chiyoda-ku, Tokyo 101-0032, Japan; |
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| Abstract: | To meet the increasing demand for air transportation, Ministry of Land, Infrastructure and Transport had carried out the offshore
extension project at Tokyo International Airport (Haneda Airport). The airport should be constructed to be perfectly level,
but the ground conditions with very thick layers of super soft dredged soils and need for reclamation made the task very difficult.
Because of large amount of consolidation settlement, ground improvement by combined vertical drain method was applied to decrease
residual and differential settlement after opening of new airport. This paper is aimed to introduce the design concept and
method of ground improvement for this project. In addition the result of ground improvement is keeping satisfactory performance
for operating airport confirmed by long-term monitoring for airport facilities. |
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