In situ soil cementation with ureolytic bacteria by surface percolation

► New application for MICP as a consolidation technique for unsaturated ground. ► Alternating layers of cementation/bacteria solution enhance bacterial fixation. ► Percolation treatment enables srength improvement without crust formation. ► Lower soil water content enables selective growth of calcite at contact points. ► Costs can be reduced by using percolation compared to submersed application.