The flexible column breaks. The rigid wall overturns.
The pre-tensioned and compacted wall with the ground does not overturn does not break. This design stops distortion and without distortion there is no failure.
Yes I know. I have solved the problem. I have also done experiments on the ground and simulations with various anchoring mechanisms. But I need a certificate of anchoring and a computer program that will be integrated into the existing programs. The method I use is with the same tendon I apply two pretensions. The first prestress is applied between the surface of the foundation soil and the mechanism at the depths of the borehole, with an intensity twice the design loads. The second prestress is applied from the sides of the walls from the upper level and has an intensity of 70% of the breaking point of the cross-section. The method is effective in rigid precast reinforced concrete structures.