Effects of seepage and weak interlayer on the failure modes of surrounding rock: model tests and numerical analysis.

ABSTRACT: The presence of weak interlayers and groundwater are common adverse geological conditions in tunnels. To investigate the modes of failure of rock masses surrounding tunnels owing to weak interlayers and groundwater, model tests and numerical simulations were conducted in this study based on two cases, and a model that considers only the weak interlayer was conducted for comparison. Based on the tests, differences between two models in terms of rock pressure, displacement, cracks and strain were analysed. The results reveal that the presence of groundwater has a significant effect on the space-time distribution of stress, displacement and cracks in the surrounding rock. Furthermore, based on the numerical model, the seepage field was analysed in terms of pore water pressure, permeability an

SUBMITTER: Hu J 

PROVIDER: S-EPMC6774976 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature