平面应变有限元分析中砂井的处理方法.doc

平面应变有限元分析中砂井的处理方法
赵维炳　陈永辉　龚友平
(河海大学岩土工程研究所)
摘　要　为了能用平面应变有限元来分析砂井地基，本文首先推导出了砂墙地基(砂井地基在平面应变条件下的表现形式)双向渗流等应变固结理论解，然后将此解与巴隆轴对称固结理论解相比较，得到砂井地基平面应变情况和轴对称情况之间的等效公式.此公式即考虑了地基水平变形，也考虑了砂井的涂抹作用.这种等效方法能方便、准确地用于砂井地基的平面应变有限元分析之中.
关键词　砂井，固结，平面应变有限元，砂墙.
　　目前，砂井(包括砂桩、塑料排水板)排水方法已广泛地应用于各种软基处理工程当中.在常规的工程设计中，一般把砂井群地基简化成单井地基，按轴对称
Plane strain finite element analysis approach Sand
Weibing CHEN Yong-hui Gong Youping
(Hohai University, Geotechnical Engineering Research Institute)
Abstract The finite element plane strain can be used to analyze the sand drain foundation, this paper derived the foundation wall of sand (sand drains ground plane strain conditions in the form of) two-way flow solutions of equal strain consolidation theory, then this solution with the Palestinians Long axisymmetric consolidating soil compared to the foundation by sand drain plane strain condition and axisymmetric equivalent between the formula. This formula is considered the foundation level of deformation, also considered the role of sand coated well. that the equivalent method is convenient and accurate foundation for the Sand Plane Strain Finite Element analysis.
Key words sand wells, consolidation, plane strain finite element, sand walls.
At present, the sand wells (including sand pile, plastic drain) drainage method has been widely used in various soft soil which. In conventional engineering, the general foundation of the Sand Group simplified into single well foundation, according to axis Duicheng