DEFORMATION ZONING BASED DETERMINATION METHOD FOR LOCKED SEGMENT OF DEFORMABLE BODY IN BENDING ROCK BANK SLOPE

To the creeping slope, accurate determination of creep segment and lock segment is the basement of stability evaluating and evolution trend predicting. This paper examines a deformable body of bending rock bank slope in southwest mountainous of China. The examination is based on the comprehensive analysis on the slope engineering geological conditions. The field investigation, ground displacement monitoring, drilling, adit, underground displacement monitoring and geophysical prospecting are used to detecting the structural characteristics of the bank slope. Then, the ground and underground deformation zoning is taking to the slope. The present stability status is examined. The locked segment and creeping segment are divided accordingly. The results show the follows.(1)The bank slope has occurred bending and toppling during the river bed scour. The depth of bending fracture plane is between 20m and 80m.(2)Creeping segment is located in middle-anterior and posterior of the slope. The locked segment is located in the middle of the slope. These results can be used to stability evaluating of these slopes. They have some reference meaning to investigation method and comprehensive analysis of other creeping slopes.