大型油罐基础沉降国内外评价标准对比

基础沉降对大型油罐的运行安全造成严重影响，特别是罐周不均匀沉降。以我国某油库在役储罐的实测沉降数据为基础，分别采用国内外储罐基础沉降控制标准SH／T3123-2001、SY／T5921-2011、API653-2009及EEMUA159—2003对其进行安全评价。建立储罐沉降的有限元计算模型，分析基础不均匀沉降对储罐强度的影响。对比有限元计算方法，评价国内外标准的差异性，结果表明：国内外地基沉降控制标准对储罐沉降的要求较保守，特别是我国标准SY／T5921-2011，比API653—2009和EEMUS159—2003对沉降量的要求更加严格。此外，目前国内外相关规范规定的储罐地基沉降指标不尽合理，沉降标准的制定应充分考虑储罐结构对地基变形的响应。（图11，表5，参12）

Comparison of evaluation standards for large oil tank foundation settlement in China and abroad

Foundation settlement has serious influence on the operation safety of large oil tank, especially the uneven settlement of tank wall. Based on the measured settlement data of storage tanks in service in a tankfarm in China, several applicable standards in China and abroad, i.e. SH/T 3123-2001, SY/T 5921 2011, API 653-2009 and EEMUA 159-2003, are employed for safety evaluation. Finite element model of settlement is built, and the influence of uneven settlement on the intensity of tank is analyzed. Compared with the finite element calculation method, the differences between above standards are evaluated. Results show that the requirements for foundation settlement in Chinese and foreign standards are relatively conservative, especially the Chinese standard S Y/T 5921-2011, which provides stricter requirements than API 653-2009 and EEMUS 159-2003. Finally, it is pointed out that foundation settlement indicators of storage tank prescribed in the rules and regulations in China and abroad are unreasonable, and the response of the tank structure on foundation deformation should be fully considered in setting the settlement standards. （11 Figures, 5 Tables, 12 References）