Practical Method Of Bridge Construction Risk Assessment And Its Applications In The Construction Of Bored Piles

Combining with the research status of risk analysis in China, according to the target of bridge risk evaluation, the thesis analyzes the risk analysis theory and method from bridge construction risk factors identification, risk estimation and risk comprehensive evaluation, and applies the theory to the risk analysis of bridge bored piles during construction.1. The necessary knowledge of risk identification, risk estimation and risk assessment of bridge construction stage is introduced, while the bridge risk analysis, especially the research status and target of risk evaluation during construction are discussed.2. By proposing the risk factors identification method of work-risk decomposition ( WBS—RBS ) which is combined with expert investigation and taking construction operation as the basic element of risk identification, the thesis systematizes and modularizes the risk identification. No matter what kind of construction work, for example, specific construction work or a full bridge construction, this method can be used.3. By applying the risk factors identification method proposed by the author to the traditional integral risk analysis method, which makes the hierarchical analysis before fuzzy analysis, the multi-target integral risk analysis method is further improved.4. A single-factor risk analytic method is established by Summing up the hierarchical analysis method, expert investigation and risk matrix evaluation method basede on ALARP.5. By using risk factors identification, multi-target integral risk analysis and single-factor risk analytic method, the thesis analyzes the construction risks of bored piles in a bridge, obtains the corresponding strategies of risk level and main risk factors of the bored piles, and provides theoretical basis for construction risk control.6. In order to provide reference for similar work in the future, a simple feasible questionnaire survey table is designed.