Abstract: To resolve the problem existing in the non-geometric information expressions of concrete dam blocks, this paper firstly describes the product breakdown structure (PBS) and work breakdown structure (WBS) of concrete dam blocks based on dam construction process and sub-projects. Then, using the PBS-WBS composite map, we develop a feature model of dam blocks that describes their geometric information with basic parameters and their non-geometric information with feature trees. Finally, OWL ontology language is used to express the features of dam blocks, and storage, query and update of the feature information are realized. Case analysis proves that this method improves the comprehensive understanding and accuracy of the information of dam blocks and can help construction technicians reasonably assign construction tasks and allocate construction resources.

Key words: concrete dam, dam block, ontology feature model, information expression, feature tree