土体固结对筒型基础结构工作性能的影响

为了分析土体固结对筒型基础结构工作性状的影响,使用大型通用有限元软件ABAQUS建立筒型基础结构与土相互作用的三维弹塑性模型,模拟在波浪荷载和结构自重作用下土体的固结过程。得到筒壁的土压力、筒底的竖向位移和基底水平切力在固结作用下的变化趋势,重点分析固结对筒型基础结构稳定性的影响。结果表明,固结使作用在结构上的力和结构产生的位移发生变化,土体发生不均匀沉降,抗倾覆稳定性降低为0.625倍,抗滑动稳定性增大为1.25倍。

Influence of soil consolidation upon working performance of cylindrical bucket foundation structure

To analyze the influence on the working performance of the cylindrical bucket foundation structure by the soil consolidation,we establish three-dimensional elastic-plastic structure-soil interaction finite element model by ABAQUS to simulate the soil consolidation process under the wave force and the structure deadweight,and obtain the variation trend under consolidation of the soil pressure on the cylinder wall,the vertical displacement on the bottom and the variation tendency of base shear stress.Analyzing the influence of consolidation for the stability of the cylindrical bucket foundation structure,we achieve results which show that the pressure on the structure and the displacement of the structure were changed under the soil consolidation,differential settlement of soil was occurred.The coefficient of overturn stability reduced to 0.625 times and the safety factor against sliding increased to 1.25 times.