Modelling earthquake-induced bedrock landslides with a seismic wave tank – Initial phase

Progress is reported in initiating a research project intended to utilise a small-scale laboratory model, dynamically-similar to large rock mountain edifices, to acquire data on the response of large rock slopes to seismic shaking. 

A small prototype seismic wave tank has been cast in concrete so that experimental techniques can be tested before committing to the design of a larger model. Fabrication and assembly of the vibration input device and of the accelerometer array are in progress. The choice of model material has been narrowed down to urethane; gelatine and silicone have both been eliminated for different reasons. 

Field inspection of the Acheron and Craigieburn rock avalanche source areas has yielded some interesting ideas, such as the relationship between coseismic rock avalanches and “Sackungen” or antiscarps. Map analysis of the source areas of the Whitehouse (1983) data set has demonstrated that there is considerable variation in morphology and setting, which requires further analysis using aerial photos. The project is on track for satisfactory completion in 2007.