Upper Bound Solution of Surrounding Rock Pressure for Deep Cavity Using Nonlinear Hoek–Brown Failure Criterion
| Autor: | Jun-zhe Liu, Helin Fu, Cheng-yang Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Article Subject
0211 other engineering and technologies Tangent 02 engineering and technology Mechanics Stability (probability) Upper and lower bounds 020501 mining & metallurgy Physics::Geophysics Nonlinear system 0205 materials engineering Hoek–Brown failure criterion Limit analysis lcsh:TA1-2040 Rock pressure lcsh:Engineering (General). Civil engineering (General) Geology 021101 geological & geomatics engineering Civil and Structural Engineering Upper bound theorem |
| Zdroj: | Advances in Civil Engineering, Vol 2018 (2018) |
| ISSN: | 1687-8086 |
| DOI: | 10.1155/2018/1490848 |
| Popis: | The linear failure criterion is generally adopted in the stability problem of geotechnical engineering, whereas the experiments have indicated that there is a nonlinear relationship between the maximum and minimum principal stresses in weak surrounding rock. According to the characteristics of weak rock, the failure mechanism of deep cavity is constructed by combining the nonlinear Hoek–Brown failure criterion and the upper bound theorem of limit analysis. The upper bound solution of the surrounding rock pressure was deduced using the tangent method. The results show that the surrounding rock pressure of deep cavity is affected by surrounding rock grade, cavity depth, and section size. Especially, the influence of the disturbance factor is quite obvious. Upper bound solution based on nonlinear Hoek–Brown failure criterion can fully take the influence of parameters on surrounding rock pressure. Therefore, this method is more scientific than the linear failure criterion to calculate the surrounding rock pressure. |
| Databáze: | OpenAIRE |
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