Mechanical Analysis of the Circular Tunnel considering the Interaction between the Ground Response Curve and Support Response Curve
| Autor: | Tianming Su, Hanyu Peng, Hongyan Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Yield (engineering)
Article Subject Field (physics) General Mathematics lcsh:Mathematics 0211 other engineering and technologies General Engineering 02 engineering and technology Mechanics Radius Circumference lcsh:QA1-939 Displacement (vector) 020501 mining & metallurgy Stress (mechanics) 0205 materials engineering lcsh:TA1-2040 Cohesion (geology) Resistance force lcsh:Engineering (General). Civil engineering (General) Geology 021101 geological & geomatics engineering |
| Zdroj: | Mathematical Problems in Engineering, Vol 2018 (2018) |
| ISSN: | 1563-5147 |
| Popis: | The viewpoint that the ground initial elastic displacement and the interaction between the ground response curve (GRC) and support response curve (SRC) in the surrounding rock should be considered at the same time in the mechanical analysis of the circular tunnel is proposed, and its solution method is also established. Meanwhile, in order to consider the effect of the intermediate principle stress, Drucker-Prager criterion is introduced to describe the yield property of the surrounding rock. The calculation example indicates that the final radial displacement of the tunnel circumference will increase when the ground initial elastic displacement in the surrounding rock is considered before the support structure is applied, which indicates that it is necessary to consider the ground initial elastic displacement in the surrounding rock before the support structure is applied. With increasing the support resistance force and the initial field stress, the plastic zone radius in the surrounding rock and the radial displacement of the tunnel circumference will decrease and increase, respectively, while with increasing the rock internal friction angle and cohesion, the plastic zone radius in the surrounding rock and the radial displacement of the tunnel circumference both decrease. Meanwhile, with the stress Lode parameter increasing from −1 to 1, the plastic zone radius in the surrounding rock and the radial displacement of the tunnel circumference both greatly decrease and then slightly increase. It indicates that the intermediate principle stress has some effect on the calculation results. |
| Databáze: | OpenAIRE |
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