| Based on 200 slopes data collected from different areas of highway and railway in China by research group of rock slope of Southwest Jiaotong University, the stability of structured rock slope is researched with method of Case-Based reasoning. The main research of this paper is briefly mentioned as follows:1. The structured rock slope is chosen from slope database and the key stability influencing factors of this type of slopes are determined as block stability coefficient K, movable block number N and synthetical joint length L by statistic analysis and pilot calculation.2. The stability of structured rock slopes is evaluated by Case-based reasoning method based on Euclidean distance, Manhattan distance, Fuzzy analog optimum and the results are compared each other.3. Considering the sensitivity of attribute weights to the environment, the algorithm of attribute weights is set up on the basis of the concept of changeable weights.4. To manage and analyze the large numbers of slope data scientifically and conveniently, the slope database system based on DOS operation system is turned into WINDOWS interface. The slope stability analysis program based on case-based reasoning is added in the database system.Based on K, N and L as the attribute parameters of structured rock slope, the 154 rock slopes are re-evaluated with case-based reasoning. The results show that the accuracy ratios of re-evaluation based on Euclidean distance, Manhattan distance, Fuzzy analog optimum are 85.06%, 83.77% and 85.71% respectively. The accuracy ratio that the result is the same with three methods is 82.47%.The results using case-based reasoning method based on parameters K, N and L on slope stability analysis in Neijiang-Kunming railway show that this method is rational and convenient.
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