Connected with the engineering concrete example

through the collection

arrangement and analysis of related data

the site investigation and exploration of engineering geology

indoor and outdoor physico-mechanical tests

adopting the analytic means of mathematic statistics

unbalanced-thrust method and non-separation contact elastoplastic FEM together

the influencing factor sensitivity of debris landslide has been analyzed and researched. The results show as follows. First

through the sensitivity analysis of main factors to influence on the stability of debris landslide

its main influenced factors are internal friction angle of sliding surface

topographic grade

saturation-area ratio of slope-mass and cohesion of sliding surface by descending order of their sensitivity coefficients. Second

the integral stability coefficient of debris landslide with large topographic grade and the slip surface of small internal friction angle is more inferior. But steady rain and intensive rainfall can raise groundwater level

augment saturation-area ratio of slope-mass

lower the rock and soil shear strength of slip-surface

and increase downward sliding force

which will bring about the most disadvantage influence on the stability of a concrete debris landslide. Meanwhile

on reinforcing and treating the debris landslide

the measure raising equivalent angle of slip-surface internal friction and lowering topographic grade connected with lowering groundwater level must be taken the prior step

and may be thought over taking the next measure to increase the soil and rock cohesion of slip surface.