地下水封石油洞库施工期安全风险评估研究

Risk assessment for an underground crude oil storage facility with water-curtaining system during construction phase

地下水封石油洞库建设具有投资大、无成熟设计施工规范、不确定因素多等特点,建设过程中存在着一定安全风险,开展地下水封石油洞库施工期安全风险评估研究具有重要意义。针对地下水封石油洞库施工期安全风险,从洞库稳定性与水封性两个方面,开展了洞库施工期安全风险评估研究,结合中国首座大型地下水封石油洞库工程对研究结论进行了验证。研究中,开展了地下水封石油洞库风险因子识别,进行了风险因子重要性和引发功能失效概率调查;采用模糊数学方法获得了风险因子模糊权重集和模糊评价集,得到了风险因子影响程度排序;总结了某地下水封石油洞库建设中典型稳定性和水封性风险事故,分析了事故发生原因,并与上文所得风险因子影响程度进行了对比验证。研究结果不但为提高地下水封石油洞库风险管理水平提供支撑,而且还可丰富地下工程安全风险评估研究内容。

The construction of underground oil storage facility with water-curtaining is characterized by large investment, lack of mature design and construction specifications and many uncertain factors, which will induce risks for the construction. It is very important to assess the risks involved in the construction of such facilities. In this study, the risk assessment is performed for both the stability and containment properties for the facilities, which are the critical concerns. The assessment results are compared with the practical experience in the first large underground oil storage facility in China. The risk sources for the stability and containment properties are identified. A survey on the significance and probability of risk resources is performed. Using the fuzzy mathematical theory, the fuzzy weight set of each risk source and fuzzy evaluation set are obtained, and the rating of the influence of each risk source is determined. The typical accidents of instability and loss of containment property during construction of Huangdao underground oil storage facility are introduced. The causes of the accidents are analyzed and compared with the risk sources rating results. The research can be helpful for the risk management and mitigation for such facilities and for enriching the assessment methods and scope of underground engineering risk assessment.