16万m^3原油储罐基础沉降计算及施工方案的确定

Foundation Settlement Calculation and Construction Scheme Determination of 16 × 10~4 m^3 Oil Storage Tank

阿布扎比原油管道项目的2座16万m3浮顶原油储罐位于沙漠中,地质结构复杂,储罐自身荷载大,罐基础设计难度大。文章详细介绍了这2座储罐罐基础的沉降计算,通过对地质结构、储罐构造和荷载的计算分析,针对不同地层分别确定模型参数,利用Plaxis软件构造了二维储罐基础沉降模型,计算得出罐底部沉降曲线;通过计算沉降量与沉降标准的对比,拟采用预压法和强夯法相结合的施工方案,以控制沉降量;经现场试夯前后试验结果的对比,确定强夯施工方案及参数;证明强夯对于改善罐底部基础机械特性和控制沉降量的效果是显著的,设计的罐基础施工方案可以满足对沉降量的控制要求。

This article describes the foundation settlement calculation of two 16 × 104 m3 floating roof tanks located in desert which belong to Abu Dhabi crude oil pipeline project.A 2-D axisymmetric model was created for each tank by applying the software Plaxis based on the research of ground condition,tank configurations and loads.The settlement curve of tank foundation was calculated based on modeling parameters of different layers.Preloading and dynamic compaction(DC) were adopted to control the settlement after making the comparison of the calculated settlement with the criteria.DC construction procedure and parameters were confirmed by the comparison of test results before and after the DC trail.It is concluded that DC has an obvious effect to improve the mechanical characteristics and settlement control,and the construction procedure adopted is satisfactory for settlement control.