An Analysis Of Risk Factors About Long-span Continuous Bridges Construction Stage

With the advancement of science and technology, construction machinery, equipment and materials development, bridge construction techniques continue to improve, enhance and progressive development and enrichment. Correspondingly, the risk of bridge construction are increasingly diverse, it is very important to understand the risks in the process of bridge construction on the building of the bridge. Construction risk analysis more and more attention to the scholars, bridge construction risk analysis has become an essential part of the construction process. The bridge construction risk analysis of various risk factors analysis and research is the basis and prerequisite for risk analysis. In this paper, From the actual needs of the bridge construction starting on the bridge during construction to study the risk theory, the main work and conclusions are as follows:1.Bridge construction process of risk identification. Induction of the bridge during the induction of risk sources and, based on progress of the project risks for new sources of expansion and deletion.2. Long-span continuous bridge construction stage of the analysis of risk factors. To cable-stayed bridge and suspension bridge, the bridge structure construction in all the various factors were analyzed in detail and the comprehensive identification, analysis and research. And human factors on the bridge construction risks are described in detail. Risk factors about long-span continuous bridges are separately concluded From the foundation construction and main beam construction.3. Bridge construction safety risk control. From the analysis and study of human risk control, technology risk control and natural risk control and other aspects in the bridge construction process, and proposed a number of risk control measures and programs. Discusses the importance of construction safety risk control, pointed out that the construction safety risk control targets of the process of bridge to reduce work loss, ensure quality and reduce the construction accidents are of positive significance.4. Against a backdrop of Nanxijiang Bridge, risk about a long-span continuous bridge construction stage is identified, and main risks are analyzed by Analytic hierarchy process, to sequence the risk, at last, risk control method is given in this paper.