ADVANCED NUMERICAL MODELLING OF GEOGRID-REINFORCED ROCKFALL PROTECTION EMBANKMENTS
Abstract
Currently, empirical or simplified analytical methods are used to design such
embankments. In order to assess behaviour of rockfall protection embankments in more detail,
Opus carried out 3D numerical simulation using the finite element software ABAQUS. In the
simulation process rock blocks were thrown onto a geogrid reinforced embankment at different
impact angles. The effects of geogrid spacing, the presence of the steel facing mesh and impact
angle have been investigated. The numerical simulation procedure can be used to develop and
optimise the design of geogrid-reinforced rockfall protection embankments.
References
Chau K.T., Wong R.H.C., Wu J.J. (2002) Coefficient of restitution and rotational motions of rockfall
impacts. Rock Mechanics and Mining Science 39.
Lambert S. & Bourrier F. (2013) Design of Rockfall Protection Embankments. Engineering Geology
Journal 154, 2013.
Maegawa K. & Van P.T. (2011) Experiments on Rockfall Protection Embankments with Geogrids and
Cushions. International Journal of Geomate. Oct. 2011, Vol. 1, no. 1 (Sl. No. 1).
ONR, 2012. ÖNORM 24810: Technical protection against rockfall – Terms and definitions, effects of
actions, design, monitoring and maintenance. Austrian standard institute, Vienna (draft 21 August 2012, in
German).
Peila D., Oggeri C., Castiglia C., Recalcati P. &Rimoldi P. (2002) Testing and modelling geogrid
reinforced soil embankments subject to high energy rock impacts. Geosynthetics - 7 ICG – Delmas.
Peila D., Oggeri C. &Castiglia C. (2007) Ground reinforced embankments for rockfall protection: design
and evaluation of full scale tests. Landslides, Vol. 4(3), Springer-Verlag, Sep. 2007.
UNI, 2012.UNI 11211–4 – Opere di difesa dallacaduta massi. Parte 4: Progetto definitive ed esecutivo
(in Italian).
