The ultimate pull-out tensile load of ground anchors is strongly dependent onsoil nature, grout injection and effective stress state around the bulb. In this paper, the comparison between the results of conventional pull-out testson instrumented anchors built in a flysch formation and those of small scale pull-out tests performed in the laboratory, on undisturbed soil samples recovered at the depth of the anchor bulb, allowed to closely examine the skin friction that can be mobilizedin undrained conditionsat the soil-structure interface. The experiments highlight a strong scale effect, probably depending on the real size androughness ofthe lateral surface of the bulb. In fact, theirregular bulb profiledue to flysch features strongly contributes to the pull-outstrength.
Performance of ground anchorsbuilt in a flysch deposit / Di Gregorio, M. C. .; Papa, R.; Urciuoli, Gianfranco; Picarelli, L.; Zeni, L.; Minardo, A.. - In: PROCEDIA EARTH AND PLANETARY SCIENCE. - ISSN 1878-5220. - 16:(2016), pp. 71-80. [10.1016/j.proeps.2016.10.008]
Performance of ground anchorsbuilt in a flysch deposit
URCIUOLI, GIANFRANCO;
2016
Abstract
The ultimate pull-out tensile load of ground anchors is strongly dependent onsoil nature, grout injection and effective stress state around the bulb. In this paper, the comparison between the results of conventional pull-out testson instrumented anchors built in a flysch formation and those of small scale pull-out tests performed in the laboratory, on undisturbed soil samples recovered at the depth of the anchor bulb, allowed to closely examine the skin friction that can be mobilizedin undrained conditionsat the soil-structure interface. The experiments highlight a strong scale effect, probably depending on the real size androughness ofthe lateral surface of the bulb. In fact, theirregular bulb profiledue to flysch features strongly contributes to the pull-outstrength.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
