越江隧道盾构法施工的风险评价方法及应用

Evaluation and Application of Underwater Tunnel Shield Construction

以往的隧道盾构风险评价方法偏重于静态的、定性的、主观的,且缺少对人为风险因素的评价。而在施工过程中存在众多随机因素,常常使评价结果和实际相差较大,为了弥补动态风险对评价结果的影响,针对越江隧道盾构法施工的特点,引入熵理论进行风险评价,提高了风险评价结果的精确度,为工程管理人员提供评价工程风险的方法,提出风险预防措施。然后,将该风险分析方法应用于某越江隧道盾构施工实例中,研究结果表明该方法的优越性,为相似隧道盾构施工的风险评价和工程管理提供经验和技术上的参考,降低了施工风险度。

providing preventive methods of engineering risk for management workers. Previous risk assessment methods of tunnel shield tend to be static, qualitative and subjective, lacking the evaluation on human risk factors. Besides, during the construction process, many random factors lead to larger difference between evaluation results and actual situation. Therefore, The paper aims to carry out risk e- valuation with respect to the tunnel shield construction. The paper introduces the entropy theory in order to compensate for the impact of dynamic risks on the evaluation results, thus improving the accuracy of risk assessment, putting forward risk analysis methods and applying the risk analysis methods to an exam- ple of river crossing shield tunnel construction. The research demonstrates the superiority of the method, providing experience and technical reference for the risk assessment and project management of similar tunnel constructions so as to lower the risk degree of construction.