Research Of Construction Safety Risk Assessment System And Application Of Urban Underground Complex

With the rapid development of urban population,urban land becomes insufficient.The traditional ground buildings have failed to meet the demand of large space in the city.More and more architectures are looking for underground space,so as to derive the urban underground complex.In the commercial concentration area with high density and large traffic flow,reasonable urban underground complex construction can effectively relieve the land shortage and traffic congestion,increase the safety of the municipal infrastructure,and can be used as a wartime air defense system to protect people's life and property.But the complicated construction process of the urban underground complex makes the process very uncertain.Not only may endanger the safety of the surrounding buildings,pipelines and roads,but also directly harm workers lives and property and the construction quality of building.At present,there lack a set of perfect construction safety risk assessment system of the urban underground complex.It is not conducive to the construction safety management.Therefore,it is necessary to have a further research on the construction safety risk assessment system of the urban underground complex,so as to provide the basis and safeguard for the construction safety management.This text built a risk index system according to the identification and analysis of the urban underground complex construction safety risk source,and established a refined construction safety risk assessment system combined with the fuzzy comprehensive evaluation method and conduct the example verification.The main research and content are as follows:From foundation pit construction and the main structure construction analysis the construction safety risk of urban underground complex.Based on cause analysis of 100 foundation pit accident,find out the risk source;Using brainstorming and expert consultation method to find out the main structure construction safety risk source.Through classifying,summary,screening,refining the identified risk source,it established the evaluation index system of urban underground complex construction safety risk,which contains 8 primary index,36 secondary index and 105 indicators.the is it has also made detailed instructions for each index of classification criteria and formed detailed index rules.Based on fuzzy comprehensive evaluation method,grey comprehensive evaluation method and analytic hierarchy process(AHP),it established the construction risk assessment system of the urban underground complex.This system uses analytic hierarchy process(AHP)to determine the weight of index and the grey fuzzy comprehensive evaluation to evaluate the construction safety risk.What's more,it used the risk assessment system to evaluate a urban underground complex and the result is consistent with the actual situation which verified the effective of the system.Finally,it put forward the corresponding control measures in view of the high risk factors.