Design of deep excavations under consideration of spatial earth pressure

摘要

The spatial support and deformation behavior of excavations with rectangular plan is characterized by an increase of deformations of the retaining walls and ground surface along the side walls with increasing distance from the excavation corners. Large-scale stress arches in the soil continuum lead to stress concentrations in the area of the excavation corners. In the engineering practice these effects are usually not taken into account in the approach of the displacement dependent earth pressure, even though a technically and economically optimized design of the excavation structure could be achieved. The investigation of spatial active earth pressure on excavations of rectangular shape and varying system stiffness of the retaining walls is subject of an ongoing research project.