Computational reliability assessment in mechanized tunneling requires realistic numerical models accounting for the uncertainty of geotechnical and tunneling process parameters. For real-time prognoses, surrogate models are in general inevitable to substitute expensive complex numerical simulations. In this paper, different strategies for surrogate modeling in mechanized tunneling simulations a...

The article presents features that distinguish geokhods from other tunneling systems. relevance of the research is determined by fact requirements for mechanized lining carrying out emergency rescue operations with use geokhod have been developed and, on basis requirements, technical solutions developed.

The mathematical model of single-phase flow of gas was established based on the k-ε two-equation model and numerically simulated the eddy air-curtain dust controlled flow field in hard rock mechanized driving face with the help of FLUENT software on account of the collocated grid SIMPLE algorithm. The result showed that, after all the pressure ventilation blown out by the radial clearance of mu...

The present paper validates two alternative global sensitivity analysis methods, namely variance-based and elementary effect, for the purpose of detecting key subsoil parameters that influence the output of mechanized tunnel finite element simulation. In the elementary effect method, a strategy for considering the dependencies, that result from a set of constraints between different parameters,...

The lining structure of Tunnel Boring Machine (TBM) excavated tunnels is composed of series of precast Reinforced Concrete (RC) pieces which are called segment. At the present paper, a novel method is introduced for seismic retrofitting of segmental tunnels located at active fault zones in rock environment with case study of Amirkabir dam to Tehran water transfer tunnel (Karadj tunnel). The mai...

energy-based optimized design of polymer fiber-reinforced tunnel lining mohammad safi                   analysis of underwater tunnels considering strain-softening behavior in plastic zone ahmad fahimifar; hamed ghadami; masoud ahmadvand; arvin abdolmaleki                                 the effect of operational parameters on penetration rate of a tbm using artificial neural networks- a case s...

With widespread increasing applications of mechanized tunneling in almost all ground conditions, prediction of tunnel boring machine (TBM) performance is required for time planning, cost control and choice of excavation method in order to make tunneling economical. Penetration rate is a principal measure of full-face TBM performance and is used to evaluate the feasibility of the machine and pre...