Numerical Exploration and Optimisation on Pullout Capacity Behaviour for Under-Reamed Piles in Dry and Partially Saturated Sand. Tikrit j. eng. sci. [Internet]. 2026 Apr. 28 [cited 2026 Sep. 9];33(1):1-13. Available from: https://www.tj-es.com/ojs/index.php/tjes/article/view/1444