Sheet piling is an earth retention and excavation support technique that retains soil using steel sheet sections with interlocking edges. Sheet piles are installed in sequence to design depth along the planned excavation perimeter or seawall alignment. The interlocked sheet piles form a wall for permanent or temporary lateral earth support with reduced groundwater inflow. Anchors can be included to provide additional lateral support if required.
Sheet pile walls have been used to support excavations for below grade parking structures, basements, pump houses, foundations, construct cofferdams, and to construct seawalls and bulkheads. Permanent steel sheet piles are designed to provide a long service life.
Vibratory hammers are used to install sheet piles. If soils are too hard or dense an impact hammer can be used to complete the installation. At certain sites where vibrations are a concern the sheets can be hydraulically pushed into the ground.
Sheet piles are also a sustainable option since they are constructed with recycled steel and they can often be reused.