Continuous field based upper bound analysis for three-dimensional tunnel face stability in undrained clay
| Autor: | Jian Yu, Sen Li, Jorgin Qi Wen Tan, Maosong Huang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Engineering
business.industry 0211 other engineering and technologies 02 engineering and technology Structural engineering 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Upper and lower bounds Stability (probability) Finite element method Computer Science Applications Face (geometry) Cover (algebra) Geotechnical engineering business Continuous field 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Computers and Geotechnics. 94:207-213 |
| ISSN: | 0266-352X |
| DOI: | 10.1016/j.compgeo.2017.09.014 |
| Popis: | A new numerical upper-bound method applicable to three-dimensional stability problems in undrained clay is proposed and applied in the analysis of tunnel face stability. Comparisons with the elasto-plastic finite element method (FEM) reveal that this method could provide sufficiently accurate upper-bound prediction for the tunnel face stability factors. For tunnels with large cover depth, the obtained results greatly improve the existing upper-bound solutions. Their corresponding velocity fields are investigated, which show a similar evolving pattern with those of the FEM. A discussion is made to compare the various advantages of multi-block mechanisms and continuous mechanisms in tunnel face stability. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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