Decision-making approach for geohazard treatment of pipelines based on case-based reasoning

A large number of prevention and treatment measures for geohazard have been developed by the pipeline construction and operation enterprises.However, how to apply successful disaster treatment experience to other similar pipeline geohazard prevention projects is still lack of in-depth research.The hazard points to be treated and the similar hazard points having been treated share some commonalities in terms of the development mechanism, damage mode, damage to pipelines, and the treatment method.Accordingly, a fuzzy analogy preferred retrieval model was established through case-based reasoning, so that a reasonable relationship could be built between the case to be solved(the target case)and the solved case(the base case): (1) A case base was established, comprising the identification area, attribute feature area and project construction information area.(2) The attribute features were weighted with the variable weight method.(3)The fuzzy analogy preferred relationship was established between the target and base cases of each attribute, and the fuzzy analogy preferred ratio matrix was formed.(4) The similar series between the target and base cases of different attributes were obtained by pairwise comparison.(5) The base case that is most similar to the target case was found out according to the comprehensive similar series considering the attribute weight.Although this method cannot replace the experience judgment of professional technicians on engineering prevention and treatment schemes, it is an intuitive and reasonable computer aided decision-making method.