Response of shaft friction along existing piles to deep excavation

• Published in: Geotechnical and geological engineering Vol. 39; no. 3; pp. 2487 - 2501
• Main Authors: Yu, Feng, Kou, Hai-lei, Guo, Yao-bo, Xie, Zheng-bing
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.03.2021; Springer Nature B.V
• Subjects: Case histories; Civil Engineering; Dredging; Earth and Environmental Science; Earth Sciences; Excavation; Feasibility studies; Friction; Geotechnical Engineering & Applied Earth Sciences; Hydrogeology; Numerical analysis; Original Paper; Piles; Shaft friction; Terrestrial Pollution; Waste Management/Waste Technology; Numerical analysis; Interface normal stress; Shaft friction; Deep excavation; Relative displacement
• ISSN: 0960-3182; 1573-1529
• DOI: 10.1007/s10706-020-01640-8

Excavation following the installation of pile may significantly affect the original behavior of installed piles. To better understand the shaft friction response of existing piles during deep excavation, the principle of pile loading transfer was discussed in this study. Based on the concept of interface normal stress and interface relative displacement, a 5-segment distribution pattern of pile shaft friction was proposed. The varying law and practical calculation model of shaft friction subject to deep excavation was also proposed through numerical analysis. Its feasibility was verified against case histories and this could provide possible reference to pile design incorporating excavation effect.