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dc.contributor.authorZhang, Wengangen
dc.contributor.authorWang, Weien
dc.contributor.authorZhou, Dongen
dc.contributor.authorZhang, Runhongen
dc.contributor.authorGoh, Anthony Teck Cheeen
dc.contributor.authorHou, Zhongjieen
dc.identifier.citationZhang, W., Wang, W., Zhou, D., Zhang, R., Goh, A. T. C., & Hou, Z. (2018). Influence of groundwater drawdown on excavation responses – A case history in Bukit Timah granitic residual soils. Journal of Rock Mechanics and Geotechnical Engineering, in press. doi:10.1016/j.jrmge.2018.04.006en
dc.description.abstractPerformances of a braced cut-and-cover excavation system for mass rapid transit (MRT) stations of the Downtown Line Stage 2 in Singapore are presented. The excavation was carried out in the Bukit Timah granitic (BTG) residual soils and characterized by significant groundwater drawdown, due to dewatering work in complex site conditions, insufficient effective waterproof measures and more permeable soils. A two-dimensional numerical model was developed for back analysis of retaining wall movement and ground surface settlement. Comparisons of these measured excavation responses with the calculated performances were carried out, upon which the numerical simulation procedures were calibrated. In addition, the influences of groundwater drawdown on the wall deflection and ground surface settlement were numerically investigated and summarized. The performances were also compared with some commonly used empirical charts, and the results indicated that these charts are less applicable for cases with significant groundwater drawdowns. It is expected that these general behaviors will provide useful references and insights for future projects involving excavation in BTG residual soils under significant groundwater drawdowns.en
dc.format.extent9 p.en
dc.relation.ispartofseriesJournal of Rock Mechanics and Geotechnical Engineeringen
dc.rights© 2018 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( licenses/by-nc-nd/4.0/).en
dc.subjectBukit Timah Granitic (BTG) Residual Soilen
dc.subjectDRNTU::Engineering::Civil engineeringen
dc.subjectBraced Excavationen
dc.titleInfluence of groundwater drawdown on excavation responses – A case history in Bukit Timah granitic residual soilsen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Civil and Environmental Engineeringen
dc.description.versionPublished versionen
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