Research On The Safety Risk Management Of Construction Stage Of Five One Village Bridge Of Ruchen Highway

After the reform and open policy,the country's economic strength has been increasing rapidly,and it is gradually caused attention to the transport infrastructure,however,the bridge occupies a pivotal position in the construction of transportation infrastructure.In recent years,with the innovation of structure and the increase of bridge span,it has been getting the rapid development of continuous rigid frame bridge with large-span and high-pier characteristics,but which also increases the difficulty to construct.Because it has the characteristics of the construction of large scale,high technical content,long construction period,investment personnel,a large amount of funds and more complexity of the construction environment in continuous rigid frame bridge with large-span and high-pier,so there are many potential risk factors in the construction process.Once the accident,the loss caused by the great influence is very serious,so it should be paid attention to research on safety management of the construction stage.It based on five one village bridge of RuChen highway in this paper,continuous rigid frame bridge with large-span and high-pier at cantilever construction safety risk management are as following:(1)According to the relevant literatures and the bridge construction accident case collected by Internet,and it is the necessity of the safety risk management of construction stage that should be to study,and according to the security risk management contents of bridge,the concept of risk and the concept and method of bridge construction risk identification,risk assessment of bridge construction and bridge construction risk management is expounded.(2)According to the five one village bridge construction documents and related literatures of similar projects,the risk sources according to the pile foundation construction,pier construction and Box Girder Cantilever Construction is surveyed.Then the method of expert investigation and factor analysis is used to identify the safety risk factors of the construction phase of the five one village bridge,At the same time the data are collected to test of reliability and validity by SPSS13.0 software,making the results more accurate,and according to the results of SPSS13.0 software,it is named of the public factors.(3)According to the method of Bayesian Network,evaluation model of security risk during construction phase of five one village bridge is established.First it is based on the expert knowledge to build a Bayesian Network topological structure,and then based on the Bayesian estimation method and normalized data,it is learned of parameters of Bayesian Network,finally,according to the Bayesian network with backward reasoning function,it is obtained of posterior probability of the safety risk factors of five one village bridge construction phase,so as to get the safety risk of five one village bridge which has relatively large risk factors.(4)It is controlled of safety risk factors of the five one village bridge from the points of personnel management,construction technology,machinery and materials.And due to the specific major risk factors,it is token corresponding measures to control the safety risk factors.