Abstract: To ensure the scientific and reasonable operation of an urban underground integrated pipe gallery, a multi-dimensional risk analysis model combining the Analytic Hierarchy Process (AHP) and cloud model theory was proposed, considering the multi-level and complexity during operation and maintenance. The multi-level evaluation index system of the urban underground integrated pipeline corridor is established by the method of work decomposition structure. The AHP is employed to calculate the weight of each risk factor layer. Forward and backward generators are utilized to create evaluation standard clouds and a comprehensive evaluation cloud, which are then compared to obtain risk analysis results. The results show that the corridor body has a great influence on normal operation during the operation and maintenance period. Within the sub-test layer, the lack of legal regulations and the damage to the tunnel body structure have a higher weight.

Key words: integrated pipe gallery, operation and maintenance, AHP-cloud model, risk assessment