Remarks on wet deep soil mixing quality control

As wet soil mixing has a lot of advantages in comparison to other soil improvement methods it is used more often all over the world. It can be used as sealing element instead of diaphragm walls or also as load bearing element as an alternative to stone columns or even to piles. For these challenging uses the quality control is important to guarantee that the values in the field match with the original design criteria. Since a soil mixing element consists mainly of the in‐situ subsoil also the quality of the final product has a natural spread. To ensure the quality of the product and thereby the stability of the founded building quality control is a big issue that has to be followed, keeping in mind that the base material is natural and a certain spread of the samples is normal. This article gives a general overview of different methods of taking samples, analyses UCS values of different jobsites and different methods. The article outlines a possible way for quality control on soil mixing projects.