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| Risk Analysis and Countermeasures on Stage of Large Span Self － anchored Suspension Bridge Construction |
| LI Tao1，ZHANG Fu － yang2 |
| 1． China Railway Shanghai Design Institute Group Co． Ltd，Shanghai 200070，China; 2． Changan University，Xi'an，Shanxi，710061，China |
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Abstract Research purposes: All risks existing design and construction were recognized on design scheme of main bridge of Yangmeizhou bridge and structure system innovation using engineering risk assessment method and main risk factors were put forward． According to risk occurrence probability and risk loss，grade judgment of bridge risks was given． At last，preventive measures to reduce and control risk were proposed．
Research conclusions: Four items of main risk factors were showed in this design by risk identification，namely?structure system innovation risk of Long － span Self － anchored Suspension Bridges，adverse weather condition risk on construction safety，? box beam? multiple points incremental launching construction risk on deformation and stability，boats accidental collision risk on temporary piers during construction． According to risk occurrence probability and risk loss， the whole risk level belongs to the second grade，which could be accepted，and preventive measures should been put into implement to promote the safety of bridge construction．
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Received: 20 October 2011
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2011, Vol. 28 
