Robust design optimization applied to braced excavations

Sara Khoshnevisan, Lei Wang, Wenping Gong, C. Hsein Juang

研究成果: 書貢獻/報告類型會議論文篇章同行評審

1 引文 斯高帕斯(Scopus)

摘要

Design of an excavation support system must satisfy the minimum factors of safety for stability requirements and the wall deformation and/or ground settlement requirements. In this paper, the authors present an application of robust geotechnical design (RGD) method on the design of braced excavations. The essence of RGD is to derive an optimal design through a careful adjustment of the design parameters so that the response of the braced excavation system is insensitive to the variation of "noise factors" such as uncertain soil parameters, model errors, and construction variation. The robust design of a diaphragm-wall-supported excavation requires an optimal selection of the design parameters such as the length (L) and thickness (t) of the wall, the vertical spacing of the struts (S), and the stiffness (EA) of the strut. Within the RGD framework, the effect of uncertainties in the noise factors on the variation of the system response is evaluated. Furthermore, the design robustness is sought along with the cost efficiency and safety. Thus, the RGD methodology involves a multi-objective optimization. As cost and robustness are conflicting objectives, such optimization usually leads to a Pareto front, which offers a tradeoff that can aid in making an informed decision.

原文???core.languages.en_GB???
主出版物標題IFCEE 2015 - Proceedings of the International Foundations Congress and Equipment Expo 2015
編輯J. Brian Anderson, Magued Iskander, Muhannad T. Suleiman, Debra F. Laefer
發行者American Society of Civil Engineers (ASCE)
頁面1380-1388
頁數9
ISBN(電子)9780784479087
DOIs
出版狀態已出版 - 2015
事件International Foundations Congress and Equipment Expo 2015, IFCEE 2015 - San Antonio, United States
持續時間: 17 3月 201521 3月 2015

出版系列

名字Geotechnical Special Publication
GSP 256
ISSN(列印)0895-0563

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???event.eventtypes.event.conference???International Foundations Congress and Equipment Expo 2015, IFCEE 2015
國家/地區United States
城市San Antonio
期間17/03/1521/03/15

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