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Geomechanics and Engineering Volume 18, Number 4, July20 2019 , pages 363-371 DOI: https://doi.org/10.12989/gae.2019.18.4.363 |
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Effects of rock-support and inclined-layer conditions on load carrying behavior of piled rafts |
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Yanghoon Roh, Garam Kim, Incheol Kim and Junhwan Lee
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| Abstract | ||
| In this study, the load carrying behavior of piled rafts installed in inclined bearing rock layer was investigated for rock-mounted and -socketed conditions. It was found that settlements induced for an inclined bearing rock layer are larger than for a horizontal layer condition. The load capacity of piled rafts for the rock-mounted condition decreased as rock-layer inclination angle (theta) increased, while vice versa for the rock-socketed condition. The load capacities of raft and piles both decreased with increasing theta for the rock-mounted condition. When bearing rock layer was inclined, loads carried by uphill-side piles were greater than those by downhill-side piles. The values of differential settlements of rock-mounted and -socketed conditions were not significantly different whereas slightly higher for the rock-socketed condition. The values of load sharing ratio (alpha_p) and its variation with settlement were not markedly changed by the inclination of bedrock. It was shown that alpha_p for piled rafts installed in rock layer was not affected by theta whereas actual loads carried by raft and piles may vary depending on the pile installation and rock-layer inclination conditions. | ||
| Key Words | ||
| piled rafts; rock socketed condition, inclined rock layer, load carrying capacity; settlement; load sharing ratio | ||
| Address | ||
| Yanghoon Roh: 1.) School of Civil and Environmental Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea 2.) Geotechnical and Tunnel Division, Dohwa Engineering Co., LTD., 438 Samseong-ro, Gangnam-gu, Seoul 06178, Republic of Korea Garam Kim, Incheol Kim and Junhwan Lee: School of Civil and Environmental Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea | ||