ABSTRACT
In recent years, cross-walls have been often used in deep excavations in urban Taiwan area to reduce diaphragm wall deflections and associated ground movements. Well documented case histories permitted to assess the effectiveness of cross-walls in reducing excavation-induced displacements (Hsiung et al., 2001; Ou et al., 2006), provided that the joints between the perimeter diaphragm walls and the cross-walls are well constructed (Hsieh et al., 2008). The beneficial effects were evaluated by comparing horizontal wall deflections monitored at locations affected by the presence of cross-walls with those measured at sites with no special support (Hsiung et al., 2001) or computed under plane strain conditions assuming no cross-walls (Ou et al., 2011).
