Experimental Study on Deformation and Load Transfer Mechanisms of Symmetrical Batter Piles under Vertical Loading

• Published in: Applied sciences 2021-04, Vol.11 (7), p.3169
• Main Authors: Liu, Kaiyuan, Han, Chao, Xu, Chengshun, Nie, Zhibao
• Format: Article
• Language: English
• Subjects: Batter piles; Bending moments; Conformation; Deformation; Deformation effects; deformation mode; Friction; Internal forces; Laboratories; Load; Load distribution; Load transfer; load transfer mechanism; Mechanical properties; Pile tests; Piles; Shear tests; Strain gauges; Stress concentration; symmetrical batter piles; tests; vertical loading; Vertical loads
• ISSN: 2076-3417; 2076-3417
• DOI: 10.3390/app11073169

Under the action of vertical loading, batter piles rarely appear individually, as they undergo horizontal and vertical displacements at the same time and produce a sizeable additional bending moment. However, previous studies have mainly focused on a single batter pile, which is inconsistent with engineering practices. Although single pile tests can easily reveal its working behavior, they also ignore two important factors, namely, the internal force redistribution caused by the deformation limitation of the mirror-like pile, and the interaction between the symmetrical piles and “clamped” soil (the soil between two symmetrical piles). Therefore, this paper took symmetrical batter piles as the test object to explore the influence of the two factors on the load transfer mechanism. Moreover, the deformation mode, distribution of inertial forces, and group effect of symmetrical batter piles were also discussed. The results showed that the “clamping effect” caused by the pile deformation had a significant impact on the load transfer. Under vertical loading, the flexible symmetrical floating batter piles were the only deformation mode. Under the constraint of the cap and mirror-like batter piles, the symmetrical conformation partially compensated for the disadvantage of the additional bending moment.