高填方地基沉降大、稳定慢、易发生不均匀沉降，且填土性质复杂，其蠕变特性对地基沉降影响显著。油罐地基对变形非常敏感，为了评价西南地区谷立高填方场地油罐地基的长期变形性能，考虑干湿循环作用、干密度和荷载等因素，开展一维固结蠕变试验，然后根据试验结果进行数值模拟研究。结果表明：随着荷载的增大，土体的蠕变效应明显增强，蠕变趋于稳定所需时间增加；随着干密度的增加，蠕变最终累积变形先保持基本不变后急剧减小；经历干湿循环后，土体产生裂隙，颗粒间的联结力减弱，累计变形增加；干湿循环作用对各级荷载下土体蠕变变形影响不同，仅当荷载小于临界荷载时，干湿循环作用才会增加土体的蠕变变形；根据试验取得的蠕变参数，进行大型油罐高填方地基长期变形有限元分析，发现油罐注满水条件下，地基的沉降变形在1年后趋于稳定，运营30年后，1#、2#和3#油罐沉降值较不考虑蠕变变形的计算结果分别增加了0.47 ~ 2.03 mm、0.71 ~ 1.52 mm和1.12 ~ 1.76 mm。考虑填土的蠕变变形后，计算的油罐地基变形指标仍满足《钢制储罐地基基础设计规范》（GB 50473—2008）控制要求。研究成果对类似高填方储罐地基变形设计计算及施工具有参考价值。

The high-fill foundation has large settlement, slow stability, and is prone to uneven settlement. Moreover, the complex nature of the fill soil and its creep characteristics have a significant impact on the foundation settlement. The oil tank foundation is highly sensitive to deformation. In order to evaluate the long-term deformation performance of the oil tank foundation at Guli high fill site in Southwest China, one-dimensional consolidation creep tests were conducted considering wet dry cycle, dry density, and load. Numerical simulation studies were then conducted based on the test results. The results show that as the load increases, the creep effect of soil is significantly enhanced, and the time required for creep to stabilize increases. With increasing dry density, the creep final cumulative deformation remains basically unchanged before rapidly decreasing. After experiencing dry-wet cycles, the soil develops cracks, and the binding force between particles weakens, meanwhile, the cumulative deformation increases. The effects of dry-wet cycles on the creep deformation of soil under various levels of load are different. Only when the load is less than the critical load, the effect of dry-wet cycles will increase the creep deformation of soil. Based on the creep parameters obtained from tests, a finite element analysis was conducted on the long-term deformation of the high-fill foundation for large oil tanks. It is found that under the condition of filling the oil tank with water, the settlement deformation of the foundation tends to stabilize after 1 year. After 30 years of operation, the settlement values of 1#, 2#, and 3# oil tanks increase by 0.47 ~ 2.03 mm, 0.71 ~ 1.52 mm, and 1.12 ~ 1.76 mm, respectively, compared to the calculation results without considering creep deformation. After considering the creep deformation of the fill soil, the calculated deformation index of the oil tank foundation still meets the control requirements of The Design Code for Foundation of Steel Storage Tanks (GB 50473—2008). The research results have reference value for the deformation design and calculation, and construction of similar high fill foundation for large oil tanks.