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基于平面变形、空间渗流(PDSS)理论,从路基工后沉降角度出发,用岩土工程静力分析有限元程序PDSS2000,进行袋装砂井处治深厚层软基的数值模拟分析,研究全过程的软基沉降、侧移、孔压分布规律。结果表明,袋装砂井能有效加速软基的排水固结。对于福厦线一般地段,当路基高度为6m时,采用间距为1 0m的袋装砂井处治软基能满足路基工后沉降要求。
Based on the theory of plane deformation and space seepage (PDSS), from the perspective of post-construction settlement of subgrade, the numerical simulation analysis of soft soil foundation of deep sand bed treated with bag sand was carried out by the finite element program of geotechnical analysis PDSS2000. Soft foundation settlement, lateral displacement, pore pressure distribution The results show that the bagged sand can effectively accelerate the drainage of soft foundation consolidation. For the general section of Fuxia Line, when the height of subgrade is 6m, the soft sand foundation treated with bagged sand pit with a spacing of 10m can meet the requirement of post-construction settlement of subgrade.