均质未贯穿竖井地基粘弹性固结分析.pdf

第24 卷 第11 期 岩石力学与工程学报 Vol.24 No.11 2005 年6 月 Chinese Journal of Rock Mechanics and Engineering June ，2005 均质未贯穿竖井地基粘弹性固结分析 1 2 2 1 刘加才 ，赵维炳 ，明经平 ，黄家清 (1. 南京工业大学 土木工程学院，江苏 南京 210098 ；2. 南京水利科学研究院 土工研究所，江苏 南京 210024) 摘要：针对均质深厚软土地基竖井未打穿情况，采用Merchant 流变模型，将现有未贯穿竖井地基线弹性固结理论 进行了推广，推导了竖井未打穿均质地基的粘弹性固结解析解。该解考虑了涂抹和井阻作用以及竖井打设区和下 卧层的相互影响。将解答编制成应用程序，用该程序分析了一竖井未打穿均质地基。分析表明，土体粘滞性对前 期固结几乎没有影响，但后期固结度明显降低。土体粘滞性对下卧层的影响程度大于对竖井打设区的影响程度。 关键词：土力学；固结；均质地基；粘弹性；竖井；流变模型 中图分类号：TU 447 文献标识码：A 文章编号：1000 –6915(2005)11 –1972 –06 VISCOELASTIC CONSOLIDATION ANALYSIS OF HOMOGENEOUS GROUND WITH PARTIALLY PENETRATED VERTICAL DRAINS 1 2 2 1 LIU Jia-cai ，ZHAO Wei-bing ，MING Jing-ping ，HUANG Jia-qing (1. College of Civil Engineering ，Nanjing University of Technology ，Nanjing 210098 ，China； 2. Geotechnical Engineering Department ，Nanjing Hydraulic Research Institute ，Nanjing 210024 ，China) Abstract ：Soft soil layer is sometimes too deep to be penetrated by vertical drains in engineering practice. Merchant rheological model is adopted ；and the viscoelastic analytical solutions are derived for the consolidation of homogeneous ground with partially penetrated vertical drains based on the existing consolidation theory of ground with partially penetrated vertical drains. Interaction relation between the section with vertical drains and the section without has been taken into account in the solution. In addition ，the effects of both well resistance and smear action also have been considered. The solutions