DEVELOPMENT OF A SEGMENTAL LINING OF OPEN-SANDWICH STRUCTURE FOR SHIELD DRIVEN TUNNELS OF RECTANGULAR CROSS SECTION AND VERIFICATION OF EFFECTIVENESS THROUGH ACTUAL CONSTRUCTION

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  • 矩形シールドトンネル覆工としてのオープンサンドイッチ構造の開発と実施工による有効性の検証
  • クケイ シールドトンネルフクコウ ト シテ ノ オープンサンドイッチ コウゾウ ノ カイハツ ト ジッシコウ ニ ヨル ユウコウセイ ノ ケンショウ

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Abstract

The demand for shield driven tumels of rectangular cross section is increasing in recent years, and the development of an economical segmental lining structure has become necessary.<br>In order to be able to employ in segmental linings an open sandwich structure constructed by first erecting a steel segments and then placing reinforced within this segments, development activity was performed with respect to joint structure selection and tightening control method, high fluidity concrete mix design and placing method, and structural analysis models.<br>The results of this development were applied to a rectangular shield driven tumel that is one of the largest in the world. Their effectiveness was verified through this construction.

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