Research On Construction Safety Risk Of High-rise Building

With high speed development of urbanization,the trend of high-rise building construction is irreversible,and many problems have appeared.Among them,it is necessary to research on the evaluation of high-rise building construction safety urgently.This paper used the high-rise building project as the research object,built a safely risk assessment model,and took measures to avoid the occurrence of construction accidents in advance.The specific research contents are as follows:(1)This paper can be summarized building construction accidents as six types of injury which based on analysis of domestic building construction accidents types from 2010 to 2014.The author summed up the accident risk source from analysis of 72 cases of typical accidents with Causality diagram analysis,which established on the theory of Accident-causing and the analysis of accidents types.The author determined the main and secondary hazards of accident by using quantitative analysis by Pareto diagram.(2)The author refined secondary rating index and gave second order index evaluation factors from five factors(man,machine,material,method,environment)by analysis of dangerous source.The author built a high-rise building construction safety evaluation index system which includes 5 first indexes,12 secondary rating indexes and 23 second order index evaluation factors.Descriptive statistical method can be prdicted the index correctly which isbased on 30 investigations(3)The high-rise building construction safety risk assessment model is established which based on Entropy weight method,AHP and Fuzzy comprehensive evaluation method.Among them,Entropy weight method got the data from 4 books on High-risk building construction safety accident cases,and AHP got the data from builders.Combining objective evaluation of Entropy weight method with subjective evaluation of AHP determine the weight.The Membership Grade of fuzzy comprehensive assessment is determined by data from builders in"Yang Guang Community".The combined weight method maike sure the evaluation model scientifically and reasonablely.(4)the author evaluates three high-building constructions of the "Yang Gang Community" project by using Entropy weight fuzzy comprehensive evaluation model,then the author proves the model feasibility.Finally,the author put forward reasonable proposals based on evaluation results by the established mode.