Abstract
This paper investigates and analyzes the risk factors of large-scale complex bridge construction through questionnaire survey and Delphi method, and obtains the risk factors and basic data that affect the construction of large complex bridges. On this basis, according to the principle of factor analysis, using SPSS V21.0 software to statistically analyze the basic data, the main factors affecting the construction risk of large complex bridges and their importance index are obtained, which provide a basis for the development of control decisions. The application of the example shows that the method given in this paper is simple in operation and the result is clear. According to the size of the factor importance index, measures can be taken to deal with major risks to ensure the smooth construction of the bridge.
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