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.
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