摘要
根据等应变条件下竖墙地基水平向固结解与竖井地基径向固结解同一深度处平均固结度在任一时刻相等原则,提出了两者之间的等效方法。以比奥固结理论为基础,采用修正剑桥模型,编制了平面固结有限元程序。通过将一高速公路试验段竖井地基等效为平面应变问题,并对其在真空堆载联合预压作用下的固结变形进行了弹塑性有限元分析,分析结果与现场实测数据较为吻合,验证了本文计算方法的合理性。
An equivalent calculation method is presented to convert axisymmetric vertical drains foundation into plane strain vertical wall foundation on the principle that solution for the horizontal consolidation of vertical wall under the condition of equal vertical strain and the solution for the radial consolidation of vertical drain wells under the same condition should have the same average degree of consolidation of arbitrary depth at each time step. Based on the Biot consolidation theory, a plane strain consolidation finite element program PCONMCC taking the Modified Cam-clay constitutive model is compiled. A highway test section stabilized with vertical drains was converted into vertical wall foundation using the equivalent calculation method mentioned above, and the consolidation and elastic-plastic deformation of which were analyzed using PCONMCC. The results tallied with the field observation, which verified the reasonableness of the calculating method.
出处
《水运工程》
北大核心
2003年第6期1-4,9,共5页
Port & Waterway Engineering
关键词
真空堆载联合预压
竖井
固结
有限元
combined vacuum-surcharge preloading
vertical drain wells
consolidation
finite element
