Sensitivity Analysis on Influencing Factors of Double-Row Piles for Excavation

Abstract:

Sensitivity analysis of double-row piles is often obtained by changing the value of single influencing factor and doesn’t considering the interaction of influencing factors. So, a new sensitivity analysis method is proposed which can consider the interaction of influencing factors. In this method, uniform design (UD) and alternating conditional expectations regression (ACE) are used. The embedded depth of the forward pile, row space, length of the back pile, equivalent thickness of forward pile, equivalent thickness of coupling beam, and equivalent thickness of back pile are six input parameters called influencing factors. The maximum horizontal displacement of the pile head (MDP), maximum bending moment of forward pile (MMF), maximum ground settlement (GS), and coefficient of global stabilization (CGS) are four outputs as target parameters. The sensitivity can be obtained in this geological condition, excavation depth and surrounding environment. It is showed that the stiffness of back pile is the critical influence factor to MDP, the stiffness of forward pile is the critical influence factor to MMF and GS, and the length of back pile is the critical influence factor to CGS.

• Periodical: Advanced Materials Research (Volumes 671-674)
• Pages: 290-295
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.671-674.290
• Online since: March 2013
• Authors: Kai Yu Jiang, Jing Cao, Hai Ming Liu, Hui Min Zhao
• Keywords: ACE, Double-Row Pile, Retaining and Protecting for Excavation, Sensitivity, Uniform Design

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