Lateral Deflection and Backfill Settlement of Sheet Pile Under Circular Surcharge Loading
摘要
Sheet pile walls are commonly employed in deep excavation with surcharge loads, occasionally in the form of a circular surcharge load. In this study, the behavior of sheet piles with a circular footing was investigated using a three-dimensional finite element approach. Front fill soil is excavated sequentially in four layers to account for construction effects during wall installation. The wall deflection and backfill ground settlements are determined with surcharge loads. A parametric study is executed by changing the parameters, such as the diameter of circular footing, the magnitude of surcharge, and the soil type to estimate the wall deflection and ground settlement behavior, which are found to be significantly affected by the parameters. Results indicate that with the increase in the diameter of the footing, the wall deflection increases significantly. However, dense sand will reduce wall deflection by 2.57 times and a backfill ground settlement by 3.28 times than loose sand for a 100 kPa surcharge placed at the top of the wall.