Method for identifying safety risk in bridge construction period

Abstract

A method for identifying safety risk in a bridge construction period comprises the following steps: 1. building a n-row m-column matrix to each construction stage; 2. setting Xij to be an original value of jth index in ith danger source in a system according to LEC (likelihood exposure consequence) scoring method in construction, wherein i is equal to 1, 2, 3, ..., n, and j is equal to 1, 2, 3; 3. determining the most dangerous value set of the index to be X0=(x1, x2, x3), and performing standardization treatment on the most dangerous index value; 4. calculating gray associated coefficients of the jth index of the ith danger source and the jth most dangerous index after the treatment according to a formula (1); 5. calculating the weight of the jth index on the basis of the gray associated coefficients according to a formula (2); and 6. calculating the association degree between the ith danger source and the most dangerous state of the danger source according to the gray associated coefficients and the weight of the jth index. By using an improved gray association analysis method and introducing maximal deviation to calculate the weight so as to identify the risk source; and compared with the LEC multiplication of the prior art, the method provided by the invention is more objective and more scientific in identification.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a safety risk identification method during bridge construction. Background technique [0002] Safety risks during the construction period should be centered on personal safety. Anything that affects personal safety is called a risk source and is a potential factor causing a safety accident. Risk identification is the first important work to be carried out in risk analysis. Risk identification must be able to solve at least three problems: first, what risks should be considered; second, what are the main factors that cause these risks; and third, what are the severity of the consequences caused by these risks. [0003] During the construction process, the bridge itself is in the state of the lowest bearing capacity, and there are many external influences, and the man-machine environment system is complex, which is a stage where personnel safety and engineering accid...

AI Technical Summary

Problems solved by technology

Although the LEC evaluation method is relatively simple, due to differences in the age, experience, specialty, and preferences of experts, it also has a greater impact on the LEC score, which is not scientific and objective enough, and the final risk source identification results are more uncertain.

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