Skip to Main content Skip to Navigation
Journal articles

A coupled elastoplastic and visco-plastic damage model for hard clay and its application for the underground gallery excavation

Abstract : The numerical modelling of the excavation of an underground gallery in hard clay has been discussed in current article. A constitutive model is proposed to describe poromechanical behaviour of the hard clay. The main features of the hard clay observed in laboratory and in-situ experimental investigation have been taken into account in the proposed constitutive model, in particular the plastic deformation, the visco-plastic deformation, the damage, etc. The influence of the initial in-situ stress and the pore pressure has been taken into consideration. The numerical modelling of the underground excavation has been implemented by using a fully coupled hydro-mechanical finite element calculation code. The performance of the model is examined by comparing numerical simulations with in situ measurements. The proposed model and the calculation procedure for the modelling of the excavation of an underground gallery have the capacity to reproduce well the excavation damaged/distributed zone and other main features and phenomena observed during the excavation process. However, the in-situ observed convergence could not be reproduced correctly. More effort on the discontinuous problem should be made for the reproduce the observed convergence.
Complete list of metadata

https://hal.univ-lorraine.fr/hal-03250566
Contributor : Farid Abed-Meraim Connect in order to contact the contributor
Submitted on : Friday, June 4, 2021 - 5:26:46 PM
Last modification on : Wednesday, November 3, 2021 - 8:56:29 AM

Links full text

Identifiers

Citation

Hanbing Bian, Xiaotian Zhang, Jianfu Shao. A coupled elastoplastic and visco-plastic damage model for hard clay and its application for the underground gallery excavation. Underground Space, Elsevier, 2017, 2 (1), pp.60-72. ⟨10.1016/j.undsp.2017.03.002⟩. ⟨hal-03250566⟩

Share

Metrics

Record views

24