本文结合国家石油储运舟山岙山基地成品油罐区4个10000m3油罐的实践，对采用搅拌桩复合地基加固深厚软土建大型油罐问题进行试验研究，简单介绍了设计方法和实施情况，对室内试验和现场测试结果进行了详细分析，提出了一些有价值的结论。 Based on the practice of the national oil storage and transportation of four 10000m3 oil tanks in the finished oil tank area of ​​Zhoushan Lushan base, this paper conducts experimental research on the application of the composite foundation of the mixing pile to reinforce the deep soft soil to build a large oil tank. The design method and implementation are briefly introduced. A detailed analysis of the results of indoor and field tests was conducted and some valuable conclusions were presented.