ABSTRACT
Man-made slopes exist all over the world. In mountainous areas, natural slopes are adapted for construction of roads and other infrastructure, and design of manmade slopes becomes an inevitable and important problem. Observational method in design for cutting high slope should consider the effect of time and based on evaluation of the natural physical, hydrological and rock and soil mechanical conditions and a considerable amount of insight into the information from in-situ monitoring and on-site cutting. The procedure of observational method in design for cutting high slope can be summarized and generalized as follows. At the beginning of design process, the engineering geological information just as the sliding mode of the slope, soil or rock mass strength on the potential failure surface and so on is uncertain. With further development, information data on slope are gradually accumulated and the understanding on the slope failure is growing.
