The thesis regards the characterisation and determination of properties of Søvind Marl, a Danish highly fissured and plastic clay. Highly fissured, plastic clays are present at great depths several places in Denmark, where extensive development activity is currently ongoing. Nonetheless, the knowledge of these highly clays is very limited. The thesis consists of three parts based on five scientific papers and a monograph covering a range of different geotechnical tests and properties.
The first part describes the geotechnical description and properties of Søvind Marl in order to get a general knowledge of the material and an idea of potential challenges. The second part deals with the preconsolidation and stiffness of Søvind Marl. This study herein evaluates the preconsolidation stresses and clarifies and discusses potential difficulties. During continuous loading oedometer tests, the earth pressure at rest is measured at various stress levels and assessed to known correlations. The third part concerns the strength parameters of Søvind Marl. The study consists of conducting undrained triaxial tests normalised using SHANSEP to determine the undrained shear strength, and the study will determine the correlation factors from field tests to undrained shear strength. Finally, the thesis is concluded with recommendations for further work within the field of plastic clays.
|Series||Ph.d.-serien for Det Teknisk-Naturvidenskabelige Fakultet, Aalborg Universitet|
- Ph.D. thesis
- Søvind Marl
- Geotechnical testing
- Laboratory tests
- Fissured clay
- Highly plastic clays