Importance evaluation of construction collapse influencing factors based on grey correlation analysis

In order to clarify the monitoring focus of construction collapse, the Gray Correlation Analysis method is used to sort the important degree of its influencing factors. Firstly, the construction collapse accidents happened between 2006 and 2010 are selected as the sample data, and then this paper screens out 18 kinds of influencing factors through the split-merge-removed method from human factors, management factors, materials and equipment, external soft environment and external natural environment, all of which will induce construction collapse accident. Secondly, based on the frequency statistics of influencing factors a multidimensional data model is established. At last, this paper makes the Gray Correlation Analysis and evaluates the importance level according to the results of gray correlation grade, so as to identify the key points preventing accidents, and it is also benefit for making targeted control programs and clearing the main responsibility of all relevant subjects.