| Autor: |
Wang Ying-chao, Shang Yue-quan, Yan Xi-shui, Xu Xing-hua |
| Předmět: |
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| Zdroj: |
Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban; 2012, Vol. 44 Issue 2, p142-148, 7p |
| Abstrakt: |
In order to reveal collapse mechanism in loose wall rock of shallow tunnel under rainfall, the cusp-catastrophic model is established based on catastrophe theory. Considering the case that surrounding rock of shallow tunnel is combined with different rock and soil mass, the instability criterions are derived when surrounding rock is combined with double strain-softening mediums or with single strain-hardening layer and strain-softening layer. The main influence factors and mechanism of collapse are analyzed. Then, the viewpoint is put forward that collapse of shallow tunnel can be predicted by data of ground settlement based on the catastrophe theory. It's feasibility and reasonability is tested by the collapse that occurs in construction of Maanshan tunnel. The results show that the derived instability criterions can analyze the collapse mechanism effectively. It is more feasible and tally with the actual that the data of ground settlement is used to predict the collapse in loose wall rock of shallow tunnel. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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