The book reviews the experiences with, as well as recent developments and research results on excavations and foundations in and on soft soil deposits. Geotechnical design and execution of civil engineering structures on very soft soils are usually associated with substantial difficulties. The aim of the authors is to give the readers an overview of the state of the art of material properties of soft soils and their application in excavations, different types of foundations and stabilization methods. The authors emphasize, however, that an underground with soft soil layer should not a priori be classified as extremely difficult and highly cost intensive. By making use of advance knowledge in soft soil engineering so far as available in the field of geotechnical engineering, it is possible to attain a technically safe and economically justifiable solution for a particular construction project. The book is expected to contribute much in this regard. The book is intended to serve practising as well as research engineers in the field of geotechnical engineering, moreover civil and structural engineers and advanced students may also find it a useful reference work.