真空-堆载联合预压软基中PVD单元的构造及应用  

Structure of PVD element and its application to soft ground improved by vacuum-surcharge preloading

作　　者：彭劼[1] 刘汉龙[1] 

机构地区：[1]河海大学岩土工程研究所,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2005年第6期663-667,共5页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金资助项目(50379010)

摘　　要：根据真空-堆载联合预压软基中塑料排水板的作用特点,提出了PVD单元的概念以及有限元格式、矩阵表达式,并将其结合到三维Biot固结有限元程序中.对真空-堆载联合预压计算例题,用PVD单元有限元法、常规有限元法进行了计算、比较,结果表明PVD单元有限元法能较好地模拟塑料排水板在真空-堆载联合预压地基中的应用.Based on the characteristics of prefabricated vertical drains （PVD） in soft ground, the FE form and matrix expression of PVD were proposed and introduced to the 3-D Biot program. A case Study of numerical calculation of a soft ground improved by vacuum-surcharge preloading with PVD element-FEM and conventional FEM shows that the present method is good in simulation of PVD applied to soft ground improved by vacuum-surcharge preloading.

关 键 词：塑料排水板 PVD单元 三维Biot有限元 

分 类 号：TU473[建筑科学—结构工程]