Sheet Piling is achieved by driving prefabricated sections into the ground. The best Sheet Pile System ‘Steel Sheets or Vinyl Sheets’ will depend on the environment and the load resistance requirements in which the Sheet Pile Wall must resist. 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 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.
A wide range of sheet pile sections and profiles are available from many steel and vinyl manufacturers. Cold-rolled sections have a weaker interlock than hot-rolled sections. In hard driving conditions this interlock might “unzip” or cause alignment problems which would require replacement of the sheet piles. Cold-rolled sections also are usually thinner than hot rolled and thus may be more prone to overstressing during driving.
Sheet piled retaining walls are often restrained by use of internal propping, bracing, anchors or deadmen. It is often possible to extract and reuse sheet piles making this an economically attractive retaining wall system.
One of the main applications for sheet piles is for temporary retaining walls or cofferdams used to allow permanent in ground construction to be undertaken. The durability of sheet piles can be extended with protective coatings.
Driven sheet piles are often installed by vibrating hammers operated off leaders mounted on tracked base machines or suspended from crawler cranes. Diesel impact hammers and hydraulic press in machines can also be used to drive or push the piles into place. Sometimes water jetting or preboring is used to assist penetration through stiff or hard layers.
Vinyl Sheet Pile