Please use this identifier to cite or link to this item:
Title: Influence of groundwater drawdown on excavation responses – A case history in Bukit Timah granitic residual soils
Authors: Zhang, Wengang
Wang, Wei
Zhou, Dong
Zhang, Runhong
Goh, Anthony Teck Chee
Hou, Zhongjie
Keywords: Bukit Timah Granitic (BTG) Residual Soil
DRNTU::Engineering::Civil engineering
Braced Excavation
Issue Date: 2018
Source: Zhang, 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.2018.04.006
Series/Report no.: Journal of Rock Mechanics and Geotechnical Engineering
Abstract: Performances 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.
ISSN: 1674-7755
DOI: 10.1016/j.jrmge.2018.04.006
Schools: School of Civil and Environmental Engineering 
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/).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

Citations 5

Updated on Jul 12, 2024

Web of ScienceTM
Citations 5

Updated on Oct 27, 2023

Page view(s)

Updated on Jul 11, 2024

Download(s) 20

Updated on Jul 11, 2024

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.