Z-Wall. A Z-Wall is constructed with patented, steel-reinforced concrete panels set on edge in a
zigzag fashion and joined with large threaded connectors (Figure 40). The structure is designed for
placement close to shore on the existing bottom without use of a filter. Heavy construction equipment
and trained personnel are required for installation. A single bolt acts as a hinge to connect adjacent
panels and allow them to settle nonuniformly but with limited tolerance, which makes Z-Walls sensitive
to bottom conditions. If the tolerable differential settlement is exceeded, the panels lean against or pull
apart from each other, causing the concrete to spall in stressed areas. The nut on the bolt also tends to
49
Previous Page
