It is rare that a 28 meter vertical slope of the highway＇ s roadbed is formed in need of topography and planning. Anti-slide piles with pre-stress anchor cable were adopted for reinforcement of the slope, the length of piles is 39 meter, and the most cantilever height of piles is 28 meter. Anchor cables of three anti-slide piles （7 # , 2 # .4 # ） have been regularly tested since they were tensioned. Quantity of the pre-stress loss of anchor cable of the anti-slide piles was calculated for construction safety and normal operation of landslide with remedial work, each factor which affects the pre-stress loss of anchor cable in system was analyzed in the paper, it provides theoretical basis for the design and management of the anchor cables thereafter.
Hydrogeology and Engineering Geology