Six non conventional in situ shear tests were carried out in order to investigate the strength properties of the Shale Limestone Chaotic Complex bimrock at the Santa Barbara disused open-pit mine. The testing procedure ensures that the failure surface is free to develop in a tortuous way along block/matrix contacts, thus allowing for the evaluation of the bimrock strength parameters by taking into account the influence of blocks, and ultimately to overcome the size limitation of laboratory specimens. The evaluated operative strength parameters show an overall larger friction angle and a lower cohesion compared to that of the clayey matrix, in agreement with the common bimrock mechanical behaviour.
In situ non conventional shear tests for the mechanical characterizationof a bimrock / N. Coli; P. Berry; D. Boldini. - STAMPA. - -:(2010), pp. 585-588. (Intervento presentato al convegno Eurock2010 – European Rock Mechanics Symposium tenutosi a Lausanne, Svizzera nel 15-18 June 2010).
In situ non conventional shear tests for the mechanical characterizationof a bimrock
COLI, NICCOLO';BERRY, PAOLO;BOLDINI, DANIELA
2010
Abstract
Six non conventional in situ shear tests were carried out in order to investigate the strength properties of the Shale Limestone Chaotic Complex bimrock at the Santa Barbara disused open-pit mine. The testing procedure ensures that the failure surface is free to develop in a tortuous way along block/matrix contacts, thus allowing for the evaluation of the bimrock strength parameters by taking into account the influence of blocks, and ultimately to overcome the size limitation of laboratory specimens. The evaluated operative strength parameters show an overall larger friction angle and a lower cohesion compared to that of the clayey matrix, in agreement with the common bimrock mechanical behaviour.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
