It is difficult to reinforce loose and fractured rock mass due to the poor quality

large deformation and low strength.Therefore

the key to ensure rock anchoring effect is efficient anchoring technologies of which the pressure dispersion-type pre-stressed anchor cable is the proper one.According to the slope characteristics for K81 in Jinhua-Lishui-Wenzhou Expressway in Zhejiang Province

the supporting design scheme is optimized through consideration of various factors and the construction key technologies of the pressure dispersion-type pre-stressed anchor cable such as anchoring force short-term loss controlling technology

compensation tension controlling technology and initial lock value controlling technology

are explored.Field monitoring data shows that the optimized scheme can improve the anchoring effect and enhance the stability of the slope.