This is a retaining wall using our original technique. It is constructed by installing steel sheet piles at an angle and preloading near the top of the piles to make them bend into a bow shape.
Warped wall body tries to return to its original, straight shape. This force is used to hold the earth fill behind the wall more firmly in place, making the wall stronger than a normal vertical retaining wall.
Furthermore, if the ground at the bottom of the excavated area is preloaded, the wall will be more resistant to displacement when it is loaded upon completion. This is due to the fact that soil typically becomes more rigid with repeated loading.
This is useful in cases where load-bearing timberings or buttresses need to be omitted.
