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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
 


Effects of rock-support and inclined-layer conditions on load carrying behavior of piled rafts
Yanghoon Roh, Garam Kim, Incheol Kim and Junhwan Lee

 
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
 

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