Abstract
Based on the basic theory of factor analysis, this paper analyzes the risk factors of large-scale bridge construction through questionnaire surveys and expert scoring methods, summarizes the basic data of factors affecting bridge construction, and then analyzes the possible application of factor analysis in bridge construction risk analysis Sex. Based on the statistical processing of the data by the IBM SPSS Statistics V21.0 software, the applicability of the method was verified through factor extraction, factor rotation, consistency analysis and construction validity, and pointed out that six types of main factors affecting the safety of bridge construction Factors, calculate the importance index and correlation of each risk factor, and sort them by size, so as to estimate the risk consequences of bridge construction in a targeted manner, and invest reasonable efforts to control according to the size and importance of the risk, so that the risk control process is more Reasonable and targeted.
Highlights
The construction of large bridges often has to face the complex social environment and natural conditions
Zhao SJ[2] made statistics on bridge collapse accidents in recent 20 years in China, and the results show that the collapse proportion of bridges in construction period accounts for one third of 151 samples
Cho t [3] put forward quantitative risk assessment method for suspension bridge construction stage based on finite element model; Azis S[4] used risk decomposition structure (RBS) method to classify and manage risks to determine the construction method of steel frame bridge; Haslam r a [5] and others studied 100 construction accidents and found that construction personnel, construction equipment and management personnel played an important role in construction accidents; Ning x [6] established the safety risk assessment function according to the probability of accidents and the linear attenuation law, and verified the effectiveness of the model through an example
Summary
The construction of large bridges often has to face the complex social environment and natural conditions It needs a long construction period, complex structural system, relatively high construction technology, and complex external relations, which makes a series of uncertain factors in the process of bridge construction, causing construction safety risks [1]. The measurability of risk factors means that through large bridges is used to evaluate quantitatively, and the the numerical quantification method, the size of the risk interference of no key indexes can be eliminated, which degree is expressed with specific numbers, which is more can improve the accuracy of bridge construction risk concise and easy to distinguish, so as to improve the assessment, and reasonably invest energy to control accuracy of risk identification process. According to the risk size and importance, so as to ensure the construction quality
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