Combined walls with CU box piles

Combined walls built up with U-type box piles (CU-2 / CAU-2 / CGU-2) and standard single, double or triple U-type sheet piles. There are several combinations possible to achieve high bending moments and moment of inertia.

These solutions are selected most often for retaining walls with a bearing function, where the box-piles increase the rigidity of the wall and/or the vertical bearing capacity, and are usually longer than the infill sheet piles.



Notes:

• the equivalent elastic section modulus shown in the tables below is applicable to the element that takes the largest stresses (lowest equivalent section modulus of the system),
• if the king piles have a different steel grade than the infill sheets, then the stresses in both elements have to be checked separately (with two different equivalent elastic section modulus!!)
• for double and triple piles, the section properties shown in the table is based on the assumption that the common interlocks are either crimped or welded.