Some Basics about the Sheet Pile

Sheet piling is a technique of earth retention and excavation support that also retains soil, using steel sheet sections with interlocking edges. Sheet piles are usually installed in sequence to design depth along the planned excavation perimeter or seawall alignment. Sheet pile walls are constructed by driving prefabricated sections into the ground. Soil conditions may allow for the sections to be vibrated into ground instead of it being hammer driven. The full wall is formed by connecting the joints of adjacent sheet pile sections in sequential installation. sheet-pile-info-10

Sheet pile walls provide structural resistance by utilizing the full section. Steel sheet piles are most commonly used in deep excavations, although reinforced concrete sheet piles have also being used successfully.

Source.