Risk assessment and evaluation method for adjacent bridge damage caused by subway construction

Abstract

The invention discloses a risk assessment and evaluation method for an adjacent bridge damage caused by subway construction. The method comprises: step one, carrying out discretization on index continuity attribute data by using a cloud model and constructing a five state zones of an index based on risk zone identification and division; step two, establishing an inference rule base piece formed by a plurality of IF-THEN rules by combining a rough set; (3), converting a practical observation index attribute value and then inputting the converted value into a corresponding first piece cloud generator, thereby generating an attribute cloud droplet; (4), after synthesis of a plurality of inference rules, carrying out step-by-step inference processing on the attribute cloud droplet by using a membership degree of a minimum inference engine as a weight of an inference result so as to obtain a final output value and a membership degree cloud droplet; and (5), setting a variable coefficient of the attribute value of the practical observation index, carrying out inference processing to obtain a plurality of cloud droplets, inputting the plurality of cloud droplets into a backward cloud generator, and outputting an expectation value used as a final risk value.

Description

technical field [0001] The invention belongs to the technical field related to engineering risk assessment, and more specifically relates to a method for estimating and evaluating the risk of adjacent bridge damage induced by subway construction. Background technique [0002] In response to problems such as population increase, traffic development, and space constraints, subways, as an important part of urban traffic infrastructure, are being built on a larger scale and faster. During the construction of the subway, it will affect the normal use of the bridge and even lead to safety problems. Therefore, how to effectively evaluate the safety risks of adjacent bridges induced by subway construction, and carry out the damage degree estimation and safety risk assessment of adjacent bridges during subway construction has great practical significance. [0003] The impact of subway construction on adjacent bridges is a complex tunnel-soil-bridge interaction process. Relevant tech...

AI Technical Summary

Problems solved by technology

In recent years, research methods have mainly focused on numerical simulation, but numerical simulation methods need to establish accurate models, and it is difficult to deal with uncertain factors in the construction process. When the simulated environment is different from the actual situation, it will lead to deviations in the analysis results

In addition, the existing safety risk assessment methods, such as analytic hierarchy process, safety checklist, fuzzy evaluation method, etc., fail to consider the nonlinear relationship between influencing factors and risks, and it is difficult to reflect the complex interaction between tunnel-soil-bridge mechanism

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