TY - GEN A1 - Grandas Tavera, Carlos Eduardo A1 - Vogelsang, Jakob A1 - Triantafyllidis, Theodoros T1 - Simplified simulation of the installation of vibro-piles in water saturated soil T2 - Soil Dynamics and Earthquake Engineering N2 - This paper presents a novel and simplified approach to simulate the effects of the vibro-pile installation on the deformation of deep excavation shoring walls at high ground water levels. Although commonly-used finite element simulations provide acceptable predictions of the wall displacements caused by underwater excavations, anchor installation, or pit dewatering processes, they could not explain the unexpected large wall movements measured in different excavations during the vibro-pile installation stage. Previous dynamic finite element … Y1 - 2019 UR - https://www.sciencedirect.com/science/article/pii/S0267726118306754 SN - 1879-341X SN - 0267-7261 IS - 121 SP - 491 EP - 498 ER - TY - CHAP A1 - Niemunis, Andrzej A1 - Grandas Tavera, Carlos Eduardo ED - Wu, Wei T1 - Essential Concepts of Neohypoplasticity T2 - Desiderata Geotechnica N2 - The neohypoplastic model [12] eliminates several shortcomings of the hypoplastic vW-HP model [17]. The most important improvements are presented here. The general form of the constitutive equation is slightly modified by two additional terms in brackets. The functions and are completely reformulated in order to deal with numerous problems of the old model: perpetuum mobile of the second kind, too small dilatancy during triaxial tension paths, poor predictions of peak stress and inconsistent behaviour of the model at the upper density limit. A new state variable similar to the one from the Sanisand model [3] is introduced. The hitherto used state variables: the stress and the void ratio are preserved, of course. Moreover, a new kind of nonlinearity is proposed: the rotation of the deviatoric stress response. The problems connected to the extension intergranular-strain extension are not discussed here. Y1 - 2019 UR - https://link.springer.com/chapter/10.1007/978-3-030-14987-1_16 SN - 978-3-030-14986-4 SN - 978-3-030-14987-1 U6 - https://doi.org/10.1007/978-3-030-14987-1 SP - 132 EP - 142 PB - Springer CY - Cham ER -