ESR-7-01

Quantitative Geotechnical Characterization of Seismic Strengthening Effect on Subaquatic Slope Stability

Ting-Wei Wu | Marum

Research

This project consists in a laboratory based, generic study that aims at quantifying the strengthening effect of earthquake loading on marine slope sediment deposits. The main goal is to explore the nature and significance of seismic strengthening in sediments of different mineralogical and grain size compositions. Expected scientific outcome is to enhance our understanding of:

  • Seismic strengthening of granular material and its dependence on parameters such as the seismic intensity, number of seismic events and overburden stresses.
  • Seismic strengthening of geotechnically more complex types of soils, for example silts, clays, sand-silt-clay mixtures, tephra, and diatom ooze.
  • Case study on natural samples incorporating real earthquake signals.

Methods

The MARUM Dynamic Triaxial Testing Device (description in Kreiter et al., 2010) is the essential apparatus to investigate marine sediment’s shear strength under static and cyclic loading conditions. Cyclic tests are carried out on different kinds of samples and will also be complemented using machines at Ifremer, NGI or Fugro laboratories during the secondments (extended research stays). Additional geotechnical methods to fully characterize the tested materials will also be used.

References

Kreiter, S., Moerz, T., Strasser, M., Lange, M., Schunn, W., Schlue, B.F., Otto, D., Kopf, A., 2010. Advanced Dynamic Soil Testing — Introducing the New Marum Dynamic Triaxial Testing Device, in: Submarine Mass Movements and Their Consequences, Advances in Natural and Technological Hazards Research. Springer, Dordrecht, pp. 31–41. https://doi.org/10.1007/978-90-481-3071-9_3

Hosting institute
 
       
Working Group
  • Marine Geotechnics
Supervisor

TEAM

Ting-Wei Wu
MARUM
PhD student – ESR 7
tingweiwu@marum.de
Homepage
Achim Kopf
MARUM
Principal Investigator – ESR 7
akopf@marum.de
Homepage

NEWS

Review of ECORD Training Course 2018
@ MARUM, Bremen, Germany

ESR 11, ESR 2, ESR 3, ESR 4, ESR 6, ESR 7, ESR 9, News | 2018-06-18
 

From 23rd to 27th April, a group of seven SLATE ESRs participated in the ECORD Training Course 2018, which took place at MARUM – Center for Marine Environmental Sciences, Bremen. This one-week course provided a “Virtual Ship Experience” and prepared the young researchers for sailing in an offshore drillship expedition.