ABSTRACT
The dry jet mixing method has been used extensively in Sweden and Finland since the beginning of the 1990th to stabilise excavations and slopes in soft clay. To increase the interaction between the columns and the surrounding soft soil the columns are usually installed in rows. There is however a lack of understanding of the behaviour of the columns. This paper describes a direct shear box apparatus intended for testing of the interaction of the columns with the soft soil with respect to a horizontal slip surface passing through the columns. The paper describes the preparation of the soft soil and of the made lime/cement columns. The model tests with the shear box apparatus will provide a basis for qualitative field tests.
