Abstract:There are shale,clay stone,silty clay stone in plunge pool and sliding slope of Wujiang Goupitan Hydropower Station,and there are marlite folium and a few medium and thin particle diameter calcareous sandstone,which are typical asymmetric soft rocks. In order to overcome uplift force in operation period and reinforcement of slide slope,more than 1 200 anchor piles have been applied to reinforcement of the soft rock layer. Three main indices such as ultimate bearing capacity,space of pile group,rock socketed depth have to be determined by in-situ test. Distance of anchor pile and rock socketed depth is usually determined by calculation,rarely by in-situ test method. The generic method of wavelet transform measurement and deep space stress measurement is applied to radial transform and influencing range of longitudinal stress. Five anchor piles pullout tests are performed,and a series of test method are designed. According to the research on collapse mode of anchor pile in different boundary conditions,the normal value of ultimate bearing capacity about anchor piles is established. According to the radial distribution rule of vertical transform about rock mass around anchor pile,influencing range of soft rock caused by anchor pile is researched,and it is confirmed that the space of pile group is 12D. Value of stress in different depths is tested by premed reinforcing steel bar apparatus;distribution rule of stress in deep place of anchor pile is researched and it is confirmed that rock socketed depth of anchor pile is 42D.