摘要
本文采用广义Voigt模型,导出普遍适用于各种粘弹性土的竖向固结和轴对称固结基本方程及其解析解。它概括了太沙基、巴隆的弹性解和钱家欢60年代发表的粘弹性解等。对于砂井地基真空或堆载预压固结分析,提出一种孔隙压力按解析解近似计算,位移数值求解的半解析方法,全面考虑了土的粘弹性、砂井地基固结三向性、井阻、涂抹、砂井群和成层地基的共同影响。理论计算与工地实测较吻合。
This paper is a review of recent studies on the consolidation theory of viscoelastic solils and 3-D calculation methods of sand drain foundations.With the generallized Voigt model,the governing equation and the analytic soulutions of 1-D and symmetric consolidation for various viscoelastic soils are derived.Terzaghi′s and Barron′s elastic solutions and Qian Jiahuan′s viscoelastic solutions are only specific ones of the generlized solution in this paper.A method for consolidation analysis of founda- tions with sand drains by vacuum and surcharge preloadings is also presented,in which excess pore pressure is calculated with the analytic solution and displaceement with a numerical method.This method takes account of the effects of 3-D consolidation,soil viscoelasticity,smear,well resistance and group action of sand drain.The presented method is simple.The calculated results for layered foundations are in fairly good agreement with field measurements.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1991年第6期1-8,共8页
Journal of Hohai University(Natural Sciences)
关键词
土
粘弹性
砂井
地基处理
边界元
sand drain for improving foundation
viscoelasticity of soil
boundary element method
