Two different wall types can be accounted for in DReW Seismic. These are diaphragm wall and sheet-pile wall.
Geometry
DIAPHRAGM WALL
Diaphragm walls refer to the scheme reported in the figure shown in the following.
Sketch of a diaphragm wall
When the wall type is set on diaphragm wall, the following data is required as input:
•excavation height, H
•embedment depth, D
•wall thickness, B
Input for diaphragm walls
The fields "pile diameter" and "center-to-center spacing" are ignored in this case, as they are used only when the wall type is set on sheet-pile wall.
SHEET-PILE WALL
Sheet-pile walls refer to the scheme reported in the figure shown in the following.
Sketch of a sheet-pile wall
When the wall type is set on sheet-pile wall, the following data is required as input:
•excavation height, H
•embedment depth, D
•pile diameter, d
•center-to-center spacing, s
Input for sheet-pile walls
In this case, the sheet-pile wall is considered as an equivalent plate element. In this context, DReW Seismic calculates an equivalent thickness, deq, to be employed in the calculation, according to the following equation:
where Ip is the moment of inertia of the pile and s is the spacing. The value of the equivalent thickness calculated according to this equation is shown in the input space, but cannot be changed.