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タイトル: | Investigation of soil deformation characteristics during pullout of a ribbed reinforcement using X-ray micro CT |
著者: | Kido, Ryunosuke https://orcid.org/0000-0002-5204-0130 (unconfirmed) Sawamura, Yasuo Kimura, Koshi Kimura, Makoto |
著者名の別形: | 木戸, 隆之祐 澤村, 康生 木村, 亮 |
キーワード: | Pullout test Ribbed reinforcement Rib-inclination angle Pullout resistance X-ray micro CT |
発行日: | Jun-2021 |
出版者: | Elsevier BV The Japanese Geotechnical Society |
誌名: | Soils and Foundations |
巻: | 61 |
号: | 3 |
開始ページ: | 642 |
終了ページ: | 657 |
抄録: | Steel-strip reinforced earth walls stabilize through the pullout resistance of the reinforcements. Soil dilation during the pullout of ribbed reinforcements may contribute to the evolution of pullout resistance; however, few studies have clarified this mechanism by investigating how soils behave with increasing pullout displacement. The ribs of the reinforcements enhance the pullout resistance, although the influence of the rib dimensions on the evolution of pullout resistance with increasing pullout displacement has not been sufficiently revealed. In the present study, a triaxial pullout apparatus is developed and pullout tests are conducted using ribbed reinforcements with different rib-inclination angles under isotropic stress. The displacement and strain fields in the soils during the pullout of the reinforcements are investigated by X-ray micro CT and a digital image correlation technique. It is found that larger rib-inclination angles provide higher pullout resistance at an early stage of the pullout because of the higher bearing resistance related to the more significant soil densification above the ribs. With increasing pullout displacement, the reinforcements with different rib-inclination angles come to behave as almost one in the same since a rigid soil wedge related to the passive soil failure is generated above the ribs. This tendency results in similar soil deformation characteristics and pullout resistance levels for every reinforcement beyond the soil failure state, although the rib-inclination angles are different. |
著作権等: | © 2021 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society. This is an open access article under the CC BY-NC-ND license. |
URI: | http://hdl.handle.net/2433/276536 |
DOI(出版社版): | 10.1016/j.sandf.2021.01.013 |
出現コレクション: | 学術雑誌掲載論文等 |
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