Optimization of site exploration effort to improve the accuracy of tunneling-induced ground settlement prediction in soft clays

Wenping Gong, Zhe Luo, Lei Wang, Hongwei Huang, C. Hsein Juang

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

Uncertainty of soil parameters can lead to either an overestimation or underestimation of tunneling-induced ground settlement in soft clays. Thus, both site exploration and soil testing are important in the prediction of tunneling-induced ground settlement. In this study, the Loganathan and Poulos model, a closed-form analytical model, was used to predict the tunneling-induced settlement in clays, and the effect of the uncertainty of input soil parameters on the variation of predicted tunneling-induced settlement in clays was investigated. A series of parametric analyses were performed to investigate the relationship between the extent of site exploration and the accuracy of the tunneling-induced ground settlement prediction. To this end, soil properties at a site were first randomly generated using Monte Carlo simulation (MCS) with predefined sample statistics and spatial variability. Next, the maximum likelihood approach was used to evaluate the statistics of soil parameters, followed by a probabilistic analysis of the tunneling-induced ground settlement. Analysis with different sample sizes was carried out to simulate different levels of site exploration effort. The level of site exploration effort was found to have a limited influence on the mean of the predicted ground settlement; however, it exhibited a great influence on the variation of the predicted ground settlement. Furthermore, a nondominant optimization technique was used to determine the number of tests needed to develop a robust prediction of tunneling-induced ground settlement. The effectiveness and significance of the proposed approach was demonstrated through an illustrative example.

原文???core.languages.en_GB???
主出版物標題Geo-Congress 2014 Technical Papers
主出版物子標題Geo-Characterization and Modeling for Sustainability - Proceedings of the 2014 Congress
發行者American Society of Civil Engineers (ASCE)
頁面505-514
頁數10
版本234 GSP
ISBN(列印)9780784413272
DOIs
出版狀態已出版 - 2014
事件2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014 - Atlanta, GA, United States
持續時間: 23 2月 201426 2月 2014

出版系列

名字Geotechnical Special Publication
號碼234 GSP
ISSN(列印)0895-0563

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???event.eventtypes.event.conference???2014 Congress on Geo-Characterization and Modeling for Sustainability, Geo-Congress 2014
國家/地區United States
城市Atlanta, GA
期間23/02/1426/02/14

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