Lateral Deformation of Cellular Diaphragm Wall at Excavation Stage

To get the general rules of stress and deformation of cellular diaphragm wall, a centrifugal model test and field monitoring were made to analyze the lateral deformation rule, effects of design parameters on wall deformation, and relationship between maximum lateral displacement and excavation depth. The research results show that horizontal displacement of wall top is large and gravitated, and front and back walls have a similar deformation rule. Excavation depth, front and rear walls' spacing, partition wall spacing, soil property and temporary bracing have great effects on the horizontal displacement. Compared with anchored diaphragm wall, cellular diaphragm wall has large and strong integral rigidity and resistance, its maximum lateral displacement is on average about 0.15% to 0.5% of excavation depth, meeting the basic deformation requirement of deep foundation pit in soft soil areas.