There are some important influences of the fault structure and its activity on the slope body stress distribution.Using the FEM based on shear strength reduction method

this paper makes the study into the fault influence on the stress field of slope body and its destruction mechanism by an example of combination of the normal faults and reverse faults with the slope body and reveals the plastic zone breakthrough process of the slope body with fault.Research shows that there are obvious difference in the stress distribution and slope deformation-destruction mechanism between the fault slopes and no-fault slopes: the maximum principal stress tracing lines near the slope surface and fault surface are parallel to the slope surfaces and fault surfaces respectively in the slope body containing fault

and the plastic area occures mainly at the slope toe and behind fault plane under natural condition.As the reduction coefficient increases

the plastic areas develop respectively from the slope toe and fault plane to the deep and upper part of the slope body

until the two plastic zones impenetrate each other.The influencing degree of the fault to the slope deformation and destruction are as follows: the reverse fault is the strongest

the normal fault is the second

and the last is the inactive fault.