Numerical analysis of deformation and stability of bucket foundation revetment under backfill loads

Bucket foundation is a new type of structure suitable for offshore soft soil foundation. Combining with the revetment project of Xuwei harbour district of Lianyungang Port, the three-dimensional finite element model for the bucket foundation revetment is established, and the variation laws of structural stress and earth pressure on the bucket wall and structural displacement under different backfill loads and water levels are analyzed. The results show that the earth pressure on the bucket wall is mainly affected by the water level on the sea side. With the decreasing water level, the earth pressures on both the port and the sea side increase. Under the joint control of structural displacement and rotation, the earth pressure on the wall of the port side shows the phenomenon of active and passive zone transitions along the depth. Under the backfill loads, the structure tends to incline to the port side and move towards the sea side. The research results may provide a basis for the stability study of bucket foundation structure. © 2021, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.