Tunnels and Underground Cities: Engineering and Innovation Meet Archaeology, Architecture and Art 2019
DOI: 10.1201/9780429424441-349
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Stability analysis for tunnel faces supported by means of polymer solutions

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“…Stability checks are an important tool for the prediction of possible collapse mechanisms of fluid-supported earth walls as well as economical precalculations for piles or shafts constructed with fluid support [2,21,22,26,29,31,32]. If filter velocities can indeed be approximated with sufficient accuracy by capillary bundle approaches with empirical interaction factors such as a à down to around ¼ 0:18 cm/h, then these models can be considered a suitable basis for existing formulations for stability checks, as the corresponding penetration rates for v\0:18 cm/h are practically negligible for temporary fluid support.…”
Section: Practical Implicationsmentioning
confidence: 99%
“…Stability checks are an important tool for the prediction of possible collapse mechanisms of fluid-supported earth walls as well as economical precalculations for piles or shafts constructed with fluid support [2,21,22,26,29,31,32]. If filter velocities can indeed be approximated with sufficient accuracy by capillary bundle approaches with empirical interaction factors such as a à down to around ¼ 0:18 cm/h, then these models can be considered a suitable basis for existing formulations for stability checks, as the corresponding penetration rates for v\0:18 cm/h are practically negligible for temporary fluid support.…”
Section: Practical Implicationsmentioning
confidence: 99%