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首先,通过K_0固结三轴试验等室内试验探讨了金山粘土的应力应变关系以及强度和刚度各向异性。采用有限单元法研究了圆形贮罐上部结构、垫层与地基共同作用以及土体各向异性对沉降的效应。其次,在试验研究的基础上,提出一组考虑初始应力状态和土体固有各向异性的非线性弹性系数实用方程式。通过强度发挥度,可以把土体刚度和强度联系起来。最后,应用比奥(Biot)固结理论有限单元法分析了二只大型油罐(容量分别为10000m~3和30000m~3)地基试水期间的固结过程,分析中考虑了上部结构、环基和垫层的刚度。计算沉降过程线和孔隙压力过程线与现场实测值接近。
Firstly, the stress-strain relationship, strength and stiffness anisotropy of the Jinshan clay were investigated through laboratory tests such as the K_0 consolidation triaxial test. The finite element method was used to study the effects of the interaction between the upper structure of the circular tank, the cushion and the foundation, and the anisotropy of the soil. Secondly, on the basis of experimental research, a set of practical equations of nonlinear elasticity coefficient considering the initial stress state and the inherent anisotropy of soil is proposed. Through the exertion of strength, soil stiffness and strength can be linked. Finally, using Biot's consolidation theory finite element method, the consolidation process during the test of two large oil tanks (capacity of 10,000m~3 and 30,000m~3) was analyzed. The upper structure and rings were considered in the analysis. Base and cushion stiffness. The calculation of the settlement process line and the pore pressure process line is close to the actual field measurement value.