Mechanisms of settlement and earth pressure-increase in the backfill subjected to cyclic lateral loading and its reStraint by geosynthetic-reinforcing
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- TATSUOKA Fumio
- 東京理科大学土木工学科
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- HIRAKAWA Daiki
- 東京理科大学土木工学科
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- AIZAWA Hiroyuki
- 東京理科大学土木工学科
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- NISHIKIORI Daiki
- 東京理科大学土木工学科
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- SOMA Ryoichi
- 東京理科大学土木工学科
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- SONODA Yosuke
- 東京理科大学土木工学科
Bibliographic Information
- Other Title
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- 繰返し水平載荷による盛土の沈下・土圧増加とジオテキスタイル補強による解決
- クリカエシ スイヘイサイカ ニ ヨル モリド ノ チンカ ドアツ ゾウカ ト ジオ テキスタイル ホキョウ ニ ヨル カイケツ
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Abstract
A new bridge system, called the GRS integral bridge, is proposed. The GRS integral bridge combines integrated girder and full-height rigid (FHR) facing with the backfill reinforced with geosynthetic-reinforcement layers that are connected to the back of the FHR facing constructed after the construction of the backfill. The top of the facing of an integral bridge displaces cyclically due to annual thermal expansion and contraction of the girder. Results from model tests revealed that the backfill may largely settle down and the earth pressure may largely increase by cyclic lateral displacements of the facing. When the bottom of the facing is hinge-supported, the earth pressure may increase largely, which may damage the facing. When the bottom of the facing is free, the active failure takes place easily in the backfill and the settlement in the backfill may become very large. It is shown that the GRS integral bridge is free from these problems.
Journal
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- Geosynthetics Engineering Journal
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Geosynthetics Engineering Journal 22 69-76, 2007
Japan Chapter of International Geosynthetics Society