Behavior of single pile subject to oblique uplift load in sandy soil under global scouring

Abstract

Soil scouring is one of the most dangerous causes of geotechnical collapse, which can result in catastrophic disasters. An experimental scaled laboratory model was used to investigate the effects of lowering the embedded length of tension pile owing to surface scouring and varying relative densities of sand soil for vertical and angled uplift force. The designs for the uplift piles beneath the concentric oblique loads exposed to surface soil scouring have not been made known up until this point. The lateral and vertical responses of the uplift piles in sandy soil were examined in a series of 1-g experimental tests that included secondary characteristics such as soil relative density, the inclination angle of the uplift load, and various applied uplift loads. By applying statistical analysis to the experimental data, it was found that global scour caused reductions in overall pile capacity where the sum of the applied uplift load ratio and the scour depth ratio was equal to 0.70. Idealized P-y curves for piles with axially vertical, horizontal, or oblique uplift loads were developed, and they can be utilized to calculate the ultimate uplift capacity at the preliminary design stage.