In this paper, the behaviour of lime/cement columns under lateral loading has been examined by performing five shear box model tests. Tests were conducted with singular lime/cement columns and with rows of columns with and without screw anchors. The lime/cement columns were installed in the shear box by mixing dry lime and cement in place with soft clay. The results show that single lime/cement columns do not contribute greatly to the shear resistance in the direct shear zone. The rows of columns increased the shear resistance considerably. The test results also show that the shear resistance of the rows of columns can be increased further by using screw anchors. The paper discusses the various failure mechanisms observed.