Topics on Micropiles in Japan

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Presentation transcript:

Topics on Micropiles in Japan IWM 2004

Topics on Micropiles in Japan Construction Example Seismic Retrofitting of Existing Piles. New foundation of Retaining wall. PWRI Collaboration Project with Private Companies Development of Rapid Overpass Method(The application of micropiles is researched as a new foundation.) Research Report Analytical Study of the Bearing Capacity of a Foundation Reinforced with Prestressed Micropiles. Thank you chairman. I would like to speak three topics.

Construction Example(1) Seismic Retrofitting of Existing Piles. ground plan Seismic Retrofitting of a service water pond at KAMEIDO in TOKYO It was built in 1970. It is a structure of 8m in height. Width is 100m×100m. It can store up the drinking water of 60,000m3. a cross section

Kamaido service water pond In the upper part, there are a baseball ground and tennis courts. In the upper part, there are a baseball ground and tennis courts.

Kamaido service water pond HMP The Existing piles were constructed by a houndstooth check at intervals of 2m. Existing pile is PC pile. It is about 35m length and 600mm in the diameter. We learn a lesson from The Hyogoken-nanbu earthquake, and Specifications for Water installations was revised in 1997. Kamaido service water pond did not satisfy Specifications for Water installations after it was revised. Seismic retrofit was needed for it and HMP was applied. I will introduce details tomorrow. 2m間隔の千鳥各子で杭が施工されています

Construction Example(2) New foundation of Retaining wall. New foundation of Retaining wall by using Batter pile.

Construction Example(2) New foundation of Retaining wall. Construction completion

PWRI Collaboration Project with Private Companies Development of Rapid Overpass Method The application of micropiles is researched as a new foundation. We have often traffic jam at the intersection. It is a social problem in Japan. ???started three years ago. Design and construction manual

PWRI Collaboration Project with Private Companies (Development of Rapid Overpass Method) 平 面 図 ※橋梁区間に充腹式アーチ橋を用いた例 ※ 側 面 図 HMP

Research Report Analytical Study of the Bearing Capacity of a Foundation Reinforced with Prestressed Micropiles. 1St Lizzi Scholarship recipient(Shogo Morimasa)