摘要
高速公路软土地基的工后沉降很大部分来自软土的次固结沉降,因此采用有限元计算工后沉降有必要考虑软土的蠕变特性。利用Plaxis软件对揭普高速某断面软土地基路堤填土施工进行数值模拟,通过等效渗透系数将砂井地基简化为天然地基进行计算,考虑软土蠕变特性,采用软土蠕变(SSC)模型,结合B iot固结有限元,计算施工期沉降和工后沉降,得到与实际较相符的结果。
Secondary compression occupies a significant part of post -construction settlement. Soft soil creep behavior shall be taken into account when estimate the post - construction settlement. This paper presents results of consolidation analyse of the soft clay layers underneath embankment in Jiepu expressway using a soft soil creep model（SSC） in the FE Plaxis program. The sand drains improved ground can be converted into homogeneous subsoil with equivalent consolidation coefficient. Numerical results from the FE analyse are in good agreement with field measured values.
出处
《盐城工学院学报（自然科学版）》
CAS
2007年第1期64-67,共4页
Journal of Yancheng Institute of Technology:Natural Science Edition
关键词
软土地基
有限元分析
揭普软土
蠕变
工后沉降
soft ground
finite element analysis
Jiepu soft soil
creep
postconstruction settlement
