Highway slopes in a mountainous area in central China have been mornitored.The deformation characteristic of the slope is recognized based on analyses of various disvantageous factors affecting the slope stability associated with reconnaissance

design and construction.Three typical profiles have been selected and several representative points are chosen for monitoring slope deformation

stresses in anchors and rainfall.Based on the mornitored data that exhibit the deformation state of slope after excavation

the factors influencing the slope deformation are investigated and the reason is found for slope displacements in the direction downward and opposite to the slope inclination.On the basis of original design and construction of anchors

anti-sliding piles and drainage measures

long-term warning thresholds are suggested for this type of slopes under different states of stability.The analytical results show that the slope is at the critical state

susceptible to rainfall

blasting and other extrinsic factors

and the original scheme of design and construction is not appropriate for the treatment of this slope.By employing the modified scheme based on optimization

the slope has been successfully stabilized in time.