Stability analysis of unstable rock collapsing based on limit analysis upper bound method

Abstract：In limit analysis upper bound method, from the deformation conditions and through the establishment of a sub-optimal oblique be permitted speed mobile market, the stability factor of the rock-collapse is obtained according to the external and internal power dissipation rate to the principle of equlibrium.In the method, the impact of external forces such as self-respect, seismic force and pore water pressure is taken account in the analysis, and it can not be affected by the impact of the structural geometry and complexity of the case load.With the above-mentioned analysis, stabilitilies of three forms (toppling, sliding and falling) of rock body are calculated on a bank of the Daduhe hydropower station.Stability factor F of limit analysis upper bound method is obtained, which response to the state of rock-stability in various operating conditions objectively.

Keyword：unstable rock;avalanche;upper bound imit analysis;stability;