WIT Press

An Experimental Comparison Of Half-scale Rockfall Protection Sandwich Structures


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15 - 26




803 kb

Paper DOI



WIT Press


A. Heymann, S. Lambert, E. Haza-Rozier, G. Vinceslas & P. Gotteland


Protection against falling rocks often requires the building of civil engineering structures such as soil reinforced embankments. A recent development consists of building a sandwich cellular structure for this purpose. Cellular structures are efficient technological solutions widely used in civil engineering for various applications. These structures also appear to be well suited to resist rockfall and to act as protective structures against impacts. This paper investigates the behaviour of three sandwich structures based on half-scale experiments. The 1.5 m high cellular sandwich structures were leaned against a concrete wall with the facing made of geocells filled with a coarse granular material. Three different granular materials were used for the kernel part of the sandwich (between the facing and the wall). The experiments were carried out with dead load \“pendular” impacts by a 260 kg spherical boulder with maximal impact energy of 10 kJ. The aim was to evaluate the ability of each kernel material for reducing the stress on the concrete wall. Keywords: impact, gabion, scrapped tyres. 1 Introduction Passive structural countermeasures against rockfall consist of structures placed in the vicinity of the elements at risks in order to intercept or deflect the rocks falling from slopes or cliffs. Among the possible structures, some are partly or totally constructed from natural granular materials as for instance galleries covered with cushion layers and embankments, the latter being appropriate for


impact, gabion, scrapped tyres