Shaking Table Test on Mitigation of Liquefaction-Induced Tunnel Uplift by Helical Pile

The tunnels located in the shallow depths of loose saturated sand are significantly prone to liquefaction-induced uplift. Research works are, therefore, progress propose efficient techniques for mitigating In this study, 1 g physical modeling was used assess performance helical piles decreasing effects pile length, number helixes, and spacing plan view were investigated. uplift mechanism tunnel system also analyzed. results demonstrate that penetration into dense layer underlying superficial liquefiable has decreased significantly. However, excessive close along resulted shear surface interference, efficiency detailed showed utilization extended transition phase during shaking. Helical can efficiently restrict possibility rapid shorten duration primary phase.