【摘 要】
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The model of catastrophic destabilization of tunnel under rock slipping in fault zone based on catastrophic theory and the potential function of fault movement were presented. On the basis of the results above, through Taylor series expansion of the equat
【机 构】
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College of Civil Engineering and Architecture, Liaoning Technical University, Fuxin 123000, China
论文部分内容阅读
The model of catastrophic destabilization of tunnel under rock slipping in fault zone based on catastrophic theory and the potential function of fault movement were presented. On the basis of the results above, through Taylor series expansion of the equation of equilibrium surface, its standard form was obtained. Analysis show that catastrophic destabilization of tunnel will occur only when stiffness ratio between elastic sector and strain weakening sector of soft rocks was larger than or equal to 1. On the other hand,sliding behavior and evolution path of fault were directly affected by exogenous process,and it was a major extraneous factor which leads to catastrophic destabilization of tunnel.In the condition of system catastrophe could be generated, if external forces vary from smaller to larger, firstly, fault sticks or creeps, and secondly, when external force equal to or larger than critical value, fault turns to slip suddenly. Inverse, if external forces vary from larger to smaller, fault smoothly slips firstly, when external force equal to or smaller than critical value, and fault turns to stick or creep suddenly.
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