Abstract: Existing technologies for scaffold construction in operational railway tunnels present multiple disadvantages, including time consumption, high cost, and low construction efficiency. To address these issues, the analytic hierarchy process(AHP)TRIZ multitheory set method has been utilized to develop a disease treatment trolley scheme. Utilizing AHP, the critical design elements of the trolley are identified, and their weights are calculated and ranked as follows: B3>B2 > C3 > B1 > D2 > C1 = C2 > D1 > D4 > D3. Based on this ranking and the boundary conditions for disease control construction, eight design elements are prioritized: protective barriers, equipment antislip and emergency recovery, high strength and stiffness, rapid entry and exit, compact nonworking size, quick expansion and contraction, fullsection operational platform, and mechanized installation of steel arch frames. Through pairwise comparison of design elements and construction of a contradiction matrix, physical and technical contradictions are identified and addressed using TRIZ theory, which clarifies the principles for resolving these contradictions. Subsequently, a trolley scheme is designed, and a prototype is developed. These findings indicate that the AHPTRIZ method provides an objective analysis of functional requirements and effectively resolves conflicts between design elements, leading to a trolley that exhibits excellent crosssectional adaptability.

Key words:  operational railway tunnels, disease treatment, analytic hierarchy process, TRIZ, trolley scheme