Print Email Facebook Twitter Analytical solutions for excess pore water pressures generated by TBM tunnelling in a semi-confined aquifer Title Analytical solutions for excess pore water pressures generated by TBM tunnelling in a semi-confined aquifer Author Xu, Tao (Southeast University) Bezuijen, Adam (Universiteit Gent) Broere, W. (TU Delft Geo-engineering) Date 2021 Abstract Tunnel-boring machine (TBM) tunnelling through an aquifer will generate excess pore water pressures in the soil around the tunnel face. Accurately predicting the magnitude of the excess pore water pressures is significant because it directly determines the effective face support pressure. In this study, an analytical solution for transient cylindrical flow caused by TBM tunnelling considering the elastic storage of the aquifer is developed. Furthermore, a quasi-static solution to couple the effect of slurry infiltration with the elastic storage is presented. It is shown that the pore water pressures derived from the analytical solution match quite well with the measurements obtained in proximity to as well as far away from the TBM. The coupled quasi-static solution also agrees with the measurements for the places close to the tunnel face, but underestimates the observations far away from the tunnel face. The results also show that a larger infiltration distance leads to a slower dissipation of excess pore water pressures, which does not make a difference during excavation (when excavation velocity is faster than the pore fluid velocity). Subject Analytical solutionExcess pore water pressureSemi-confined aquiferSlurry infiltrationTBM Tunnelling To reference this document use: http://resolver.tudelft.nl/uuid:1c08ffbb-231c-4bcb-a6ab-f79a21e0772e DOI https://doi.org/10.1016/j.tust.2021.104162 Embargo date 2022-03-13 ISSN 0886-7798 Source Tunnelling and Underground Space Technology, 118 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2021 Tao Xu, Adam Bezuijen, W. Broere Files PDF 1_s2.0_S0886779821003539_main.pdf 4.43 MB Close viewer /islandora/object/uuid:1c08ffbb-231c-4bcb-a6ab-f79a21e0772e/datastream/OBJ/view