Computational modelling of the mechanised excavation of deep tunnels in weak rock

Numerical Analysis and Back Calculation of Embankment Dam Using Monitoring Results (Case Study: Iran-Lurestan Rudbar)

“…One of the parameters for stability analysis of earth and rockfill dams is the most of settlement experience of earth rockfill dams during construction [24]. Fig.…”

“…In addition, the results of settlement showed that after the first impounding, the reservoir increased, but the value of settlement decreased and tended to be fixed over time [21]. From back analysis in Geotechnical projects, studying the type of stability of slopes and correction methods of instability can be mentioned [22], analyzing types of tunnel, caverns and galleries stability [19], and also the calibration of models [23], analyzing, and estimation of probability of fracture expansion and its effect on the safety of concrete dams [24], analyzing earth and rock fill dams during all stages of construction and completion of construction [25]. The use of back analysis as a suitable method for selection of foundation and loan sources [26].…”

Effects of Construction Sequences and Volume Loss on Perpendicularly Crossing Tunnels

“…No horizontal displacement is allowed at the tunnel face during each tunnel advancing step. e tunnel excavation modelling strategy is also adopted by Zhao et al [20] and Boonyarak and Ng [19], who conducted the tunnel excavation experiment and compared the measured data with the numerical results. e considerable consistency between the measured data and the numerical results proved that the tunnel excavation modelling strategy in this study can be used to correctly estimate the soil and lining deformations for this problem.…”

Analysis and modelling of longitudinal deformation profiles of tunnels excavated in strain-softening time-dependent rock masses

“…In a geomechanics framework, accidents are frequently related to fractures. The complexity of different geomaterials makes the study of these fractures a critical topic for the understanding of their behaviour; such a study constitutes a very important step in the mitigation of accidents that may occur in mining or civil engineering works such as tunnel excavation [1,2]. Rock masses undergo progressive damage and long-term viscous behaviour throughout excavation and construction.…”

“…Most tunnel designs are currently based on empirical, analytical or numerical methods [1,3,. Among all these methods, the convergence-confinement method (CCM) is an analytical method that was developed in the 1930s [45] and later refined by other researchers [7,26,29,32,36,37,46].…”