In this paper we analyze these data and find that the deformation wave of long period comes from pre-movement before a strong earthquake.

We can get the safety factor and position of any sliding surface of a slope by the program;and also we can get the most dangerous sliding surface and its safety factor of a slope.

The performances are mainly focused on the following: (1)landslide sliding surface Searching and analysis; (2)the gravel-soil shear strength in Three Georges Reservoir Zone; (3) Computation precision study on limit equilibrium slices method of slope stability analysis; (4) The practical method for determining the phreatic line .

When there are some parallel interfaces (like faults) in accordance with the slope in the bedrock slope, sometimes it is difficult to determine the slip surface and judge whether the slope has already slidden or not by some macro exploring only.

Soil samples from freshly exposed slip surface and adjacent surface have been studied at two landslides in the Three Gorges Reservoir area,China.

It is thought that, in order to improve the level of landslide prediction, landslide prediction should be based on the thorough study on landslide types, landslide characteristics and deformation feature and mechanism.

On the basis of mechanism analysis for slope deformation\|failure and discussiopn for basic problems of landslide prediction,authors introduce the nonlinear scientific theory and gray system theory,which are proved to be effective in the solution of complex problems,into the landsli.

Application of Slip-reserved Thin Wallboard Installation Techniques;