Experimental and numerical investigations of dyke failures involving soft materials
| Autor: | Johannes Antonius Maria Teunissen, Elliot James Fern, Alexander Rohe, C. Zwanenburg, Kenichi Soga, Dirk Arie de Lange |
|---|---|
| Přispěvatelé: | Fern, Elliot James [0000-0003-1607-2378], Apollo - University of Cambridge Repository |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
021110 strategic
defence & security studies geography Centrifuge geography.geographical_feature_category 0211 other engineering and technologies Stiffness Geology 02 engineering and technology Slip (materials science) Geotechnical Engineering and Engineering Geology 4019 Resources Engineering and Extractive Metallurgy Brittleness medicine Geotechnical engineering 4005 Civil Engineering medicine.symptom Levee Subsoil Scale model Material point method 021101 geological & geomatics engineering 40 Engineering |
| DOI: | 10.17863/cam.4205 |
| Popis: | This paper presents the results of an experimental and numerical investigation on the collapse of dykes involving soft soils. Nine centrifuge tests were carried out to investigate the dyke-subsoil interaction. The tests consisted in placing a dyke made out of Speswhite clay or Baskarp sand on a subsoil. The dykes and the subsoils were alternatively changed to explore the different contrast in stiffness ranging from stiff dykes on soft subsoil to soft dykes on stiff subsoils. The small scale models were placed in the centrifuge and were progressively accelerated up to a maximum of 100 G. The recordings, which were then processed by Particle Image Velocimetry (PIV), offered an insight onto the deformation and failure mechanisms. The results showed that dykes placed on a stiff subsoil underwent brittle failures with the development of slip surfaces whereas the same dyke placed on a soft subsoil underwent large deformation which presented a serviceability issue. These tests were then modelled with the Material Point Method (MPM), which is a continuum-based method for numerical simulation dedicated for large deformation problems. Simple constitutive models were used for which the parameters could be estimated using state indices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|